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[*]
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
charset = utf-8
indent_style = space
indent_size = 8
[Makefile.am]
indent_style = tab
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/.gitignore 0000664 0000000 0000000 00000000020 15116374247 0022213 0 ustar 00root root 0000000 0000000 *.cache
/build/
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/.gitlab-ci.yml 0000664 0000000 0000000 00000002532 15116374247 0022671 0 ustar 00root root 0000000 0000000 include:
- project: 'freedesktop/ci-templates'
ref: master
file: '/templates/fedora.yml'
# Let's define some stages to get the correct order of jobs.
stages:
- container
- build
variables:
# The upstream repository path on gitlab.freedesktop.org to check
# for existing container images.
FDO_UPSTREAM_REPO: pipewire/rtkit
# A simple template so we only have one place where we need to
# define the Fedora version and the image tag
# Using a date as tag is best practice but it can be any string
# allowed by the GitLab registry.
.rtkit.fedora:43:
variables:
FDO_DISTRIBUTION_VERSION: 43
FDO_DISTRIBUTION_TAG: '2025-12-09.0'
# A job to build a Fedora 43 container with required deps
build-fedora-container:
extends:
- .fdo.container-build@fedora # the CI template
- .rtkit.fedora:43 # our template job above
stage: container
variables:
# Packages to install on the container
FDO_DISTRIBUTION_PACKAGES: >-
dbus-devel
gcc
git
libcap-devel
meson
polkit-devel
systemd-devel
xxd
# The build job for your project. Extending from the CI Templates
# .fdo.distribution-image makes it use the same image we built above.
build:
extends:
- .fdo.distribution-image@fedora
- .rtkit.fedora:43
stage: build
script:
- meson setup build
- ninja -C build
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/GPL 0000664 0000000 0000000 00000104515 15116374247 0020606 0 ustar 00root root 0000000 0000000 GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
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17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
Copyright (C)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
Copyright (C)
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
.
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/LICENSE 0000664 0000000 0000000 00000000363 15116374247 0021242 0 ustar 00root root 0000000 0000000 LICENSES
The daemon itself is GPL3 licensed, for more information see the GPL
file.
The client library is BSD licensed, for more information see the
headers of the appropriate files.
Lennart Poettering, 2009
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/README 0000664 0000000 0000000 00000024156 15116374247 0021123 0 ustar 00root root 0000000 0000000 REALTIMEKIT Realtime Policy and Watchdog Daemon
GIT:
https://github.com/heftig/rtkit
NOTES:
RealtimeKit is a D-Bus system service that changes the
scheduling policy of user processes/threads to SCHED_RR
(i.e. realtime scheduling mode) on request. It is intended to
be used as a secure mechanism to allow real-time scheduling to
be used by normal user processes.
RealtimeKit enforces strict policies when handing out
real-time security to user threads:
* Only clients with RLIMIT_RTTIME set will get RT scheduling
* RT scheduling will only be handed out to processes with
SCHED_RESET_ON_FORK set to guarantee that the scheduling
settings cannot 'leak' to child processes, thus making sure
that 'RT fork bombs' cannot be used to bypass RLIMIT_RTTIME
and take the system down.
* Limits are enforced on all user controllable resources, only
a maximum number of users, processes, threads can request RT
scheduling at the same time.
* Only a limited number of threads may be made RT in a
specific time frame.
* Client authorization is verified with PolicyKit
RealtimeKit can also be used to hand outh high priority
scheduling (i.e. negative nice level) to user processes.
In addition to this a-priori policy enforcement, RealtimeKit
also provides a-posteriori policy enforcement, i.e. it
includes a canary-based watchdog that automatically demotes
all real-time threads to SCHED_OTHER should the system
overload despite the logic pointed out above. For more
information regarding canary-based RT watchdogs, see the
Acknowledgments section below.
In its duty to manage real-time scheduling *securely*
RealtimeKit runs as unpriviliged user, and uses capabalities,
resource limits and chroot() to minimize its security impact.
RealtimeKit probably has little use in embedded or server use
cases, use RLIMIT_RTPRIO there instead.
WHY:
If processes that have real-time scheduling privileges enter a
busy loop they can freeze the entire the system. To make sure
such run-away processes cannot do this RLIMIT_RTTIME has been
introduced. Being a per-process limit it is however easily
cirumvented by combining a fork bomb with a busy loop.
RealtimeKit hands out RT scheduling to specific threads that
ask for it -- but only to those and due to SCHED_RESET_ON_FORK
it can be sure that this won't 'leak'.
In contrast to RLIMIT_RTPRIO the RealtimeKit logic makes sure
that only a certain number of threads can be made realtime,
per user, per process and per time interval.
CLIENTS:
An MIT-licensed reference implementation of the client is
available in rtkit.[ch] as part of the package. If you just
want rtkit realtime scheduling and don't care about the details,
you may copy these files into your source tree, then run this
function to enable realtime scheduling:
if (rtkit_make_realtime_simple() < 0) {
fprintf(stderr, "Failed to switch to realtime scheduling.\n");
}
This implementation depends on dbus. Run
pkgconf --cflags dbus-1
for the C flags necessary for compiling and
pkgconf --libs dbus-1
for the libs necessary for linking.
However, given how simple the D-Bus interface is, you might
choose to implement your own client implementation.
ADVANCED CLIENTS:
Clients communicate with rtkit through a small D-Bus interface:
service: org.freedesktop.RealtimeKit1
object: /org/freedesktop/RealtimeKit1
interface: org.freedesktop.RealtimeKit1
This interface has the following properties:
s32 MaxRealtimePriority;
s32 MinNiceLevel;
s64 RTTimeUSecMax;
To request realtime scheduling, a client calls this method:
void MakeThreadRealtime(u64 thread_id, u32 priority);
priority may be any value between 1 and MaxRealtimePriority.
Use setrlimit() to set RLIMIT_RTTIME to any value between 1
and RTTimeUSecMax before calling this method, or it will fail.
This method merely reduces niceness without changing the
scheduling policy:
void MakeThreadHighPriority(u64 thread_id, s32 nice_level);
nice_level may be any value between MinNiceLevel and 0.
In both cases, the thread IDs need to be passed as kernel
tids as returned by gettid(), not a pthread_t!
It is possible to promote thread in process to realtime/high
priority from another process, that will make the DBUS call,
using:
void MakeThreadRealtimeWithPID(u64 process, u64 thread_id, u32 priority);
void MakeThreadHighPriorityWithPID(u64 process, u64 thread_id, s32 nice_level);
where process is the PID of the process that has thread thread_id.
It is advisable to try acquiring realtime scheduling with
sched_setsheduler() first, so that systems where RLIMIT_RTPRIO
is set can be supported.
Here's an example using the reference implementation. Replace
this:
struct sched_param p;
memset(&p, 0, sizeof(p));
p.sched_priority = 3;
sched_setscheduler(0, SCHED_RR|SCHED_RESET_ON_FORK, &p);
by this:
struct sched_param p;
memset(&p, 0, sizeof(p));
p.sched_priority = 3;
if (sched_setscheduler(0, SCHED_RR|SCHED_RESET_ON_FORK, &p) < 0
&& errno == EPERM)
rtkit_make_realtime(system_bus, 0, p.sched_priority);
But of course add more appropriate error checking! Also,
falling back to plain SCHED_RR when SCHED_RESET_ON_FORK causes
EINVAL migt be advisable).
DAEMON:
The daemon is automatically started on first use via D-Bus
system bus activation.
Currently the daemon does not read on any configuration file,
however it can be configured with command line parameters. You
can edit
/usr/share/dbus-1/system-services/org.freedesktop.RealtimeKit1.service
to set those.
Run
/usr/libexec/rtkit-daemon --help
to get a quick overview on the supported parameters and their
defaults. Many of them should be obvious in their meaning. For
the remaining ones see below:
--max-realtime-priority= may be used to specify the maximum
realtime priority a client can acquire through
RealtimeKit. Please note that this value must be smaller than
the value passed to --our-realtime-priority=.
--our-realtime-priority= may be used to specify the realtime
priority of the daemon itself. Please note that this priority
is only used for a very short time while processing a client
request. Normally the daemon will not be running with a
realtime scheduling policy. The real-time priorities handed
out to the user must be lower than this value. (see above).
--min-nice-level= may be used to specify the minimum nice
level a client can acquire through RealtimeKit.
--our-nice-level= may be used to specify the nice level the
the daemon itself uses most of the time (except when
processing requests, see above). It is probably a good idea to
set this to a small positive value, to make sure that if the
system is overloaded already handing out further RT scheduling
will be delayed a bit.
--rttime-usec-max= may be used to control which RLIMIT_RTTIME
value clients need to have chosen at minimum before they may
acquire RT scheduling through RealtimeKit.
--users-max= specifies how many users may acquire RT
scheduling at the same time for one or multiple of their
processes.
--processes-per-user-max= specifies how many processes per
user may acquire RT scheduling at the same time.
--threads-per-user-max= specifies how many threads per user
may acquire RT scheduling at the same time. Of course this
value should be set higher than --process-per-user-max=.
--actions-burst-sec= may be used to influence the rate
limiting logic in RealtimeKit. The daemon will only pass
realtime scheduling privileges to a maximum number of threads
within this timeframe (see below).
--actions-per-burst-max= may be used to influence the rate
limiting logic in RealtimeKit. The daemon will only pass
realtime scheduling privileges to this number of threads
within the time frame configured via
--actions-burst-sec=. When this limit is reached clients need
to wait until that time passes before requesting RT scheduling
again.
--canary-cheep-msec= may be used to control how often the
canary thread shall cheep.
--canary-watchdog-msec= may be used to control how quickly the
watchdog thread expects to receive a cheep from the canary
thread. This value must be chosen larger than
--canary-cheep-msec=. If the former is set 10s and the latter
to 7s, then the canary thread can trigger and deliver the
cheep with a maximum latency of 3s.
ACKNOWLEDGMENTS:
The canary watchdog logic is inspired by previous work of
Vernon Mauery, Florian Schmidt, Kjetil Matheussen:
http://rt.wiki.kernel.org/index.php/RT_Watchdog
LICENSE:
GPLv3+ for the daemon
MIT for the client reference implementation
AUTHOR:
Lennart Poettering
REQUIREMENTS:
Linux kernel >= 2.6.31
D-Bus
PolicyKit >= 0.92
OPTIONAL DEPENDENCIES:
libsystemd - to let rtkit talk to systemd using the sd-daemon API
logind (runtime) - to gracefully handle system-suspend
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/config.h.meson 0000664 0000000 0000000 00000000160 15116374247 0022766 0 ustar 00root root 0000000 0000000 #ifndef fooconfighfoo
#define fooconfighfoo
#mesondefine PACKAGE_VERSION
#mesondefine HAVE_LIBSYSTEMD
#endif
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/m4/ 0000775 0000000 0000000 00000000000 15116374247 0020553 5 ustar 00root root 0000000 0000000 rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/m4/acx_pthread.m4 0000664 0000000 0000000 00000025423 15116374247 0023305 0 ustar 00root root 0000000 0000000 # ===========================================================================
# http://www.nongnu.org/autoconf-archive/acx_pthread.html
# ===========================================================================
#
# SYNOPSIS
#
# ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
#
# DESCRIPTION
#
# This macro figures out how to build C programs using POSIX threads. It
# sets the PTHREAD_LIBS output variable to the threads library and linker
# flags, and the PTHREAD_CFLAGS output variable to any special C compiler
# flags that are needed. (The user can also force certain compiler
# flags/libs to be tested by setting these environment variables.)
#
# Also sets PTHREAD_CC to any special C compiler that is needed for
# multi-threaded programs (defaults to the value of CC otherwise). (This
# is necessary on AIX to use the special cc_r compiler alias.)
#
# NOTE: You are assumed to not only compile your program with these flags,
# but also link it with them as well. e.g. you should link with
# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
#
# If you are only building threads programs, you may wish to use these
# variables in your default LIBS, CFLAGS, and CC:
#
# LIBS="$PTHREAD_LIBS $LIBS"
# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# CC="$PTHREAD_CC"
#
# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
# has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name
# (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
#
# ACTION-IF-FOUND is a list of shell commands to run if a threads library
# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
# is not found. If ACTION-IF-FOUND is not specified, the default action
# will define HAVE_PTHREAD.
#
# Please let the authors know if this macro fails on any platform, or if
# you have any other suggestions or comments. This macro was based on work
# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
# Alejandro Forero Cuervo to the autoconf macro repository. We are also
# grateful for the helpful feedback of numerous users.
#
# LICENSE
#
# Copyright (c) 2008 Steven G. Johnson
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see .
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
AC_DEFUN([ACX_PTHREAD], [
AC_REQUIRE([AC_CANONICAL_HOST])
AC_LANG_SAVE
AC_LANG_C
acx_pthread_ok=no
# We used to check for pthread.h first, but this fails if pthread.h
# requires special compiler flags (e.g. on True64 or Sequent).
# It gets checked for in the link test anyway.
# First of all, check if the user has set any of the PTHREAD_LIBS,
# etcetera environment variables, and if threads linking works using
# them:
if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
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PTHREAD_CFLAGS=""
fi
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
fi
# We must check for the threads library under a number of different
# names; the ordering is very important because some systems
# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
# libraries is broken (non-POSIX).
# Create a list of thread flags to try. Items starting with a "-" are
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acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
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# none: in case threads are in libc; should be tried before -Kthread and
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# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
# -pthreads: Solaris/gcc
# -mthreads: Mingw32/gcc, Lynx/gcc
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
# doesn't hurt to check since this sometimes defines pthreads too;
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# ... -mt is also the pthreads flag for HP/aCC
# pthread: Linux, etcetera
# --thread-safe: KAI C++
# pthread-config: use pthread-config program (for GNU Pth library)
case "${host_cpu}-${host_os}" in
*solaris*)
# On Solaris (at least, for some versions), libc contains stubbed
# (non-functional) versions of the pthreads routines, so link-based
# tests will erroneously succeed. (We need to link with -pthreads/-mt/
# -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
# a function called by this macro, so we could check for that, but
# who knows whether they'll stub that too in a future libc.) So,
# we'll just look for -pthreads and -lpthread first:
acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags"
;;
esac
if test x"$acx_pthread_ok" = xno; then
for flag in $acx_pthread_flags; do
case $flag in
none)
AC_MSG_CHECKING([whether pthreads work without any flags])
;;
-*)
AC_MSG_CHECKING([whether pthreads work with $flag])
PTHREAD_CFLAGS="$flag"
;;
pthread-config)
AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
if test x"$acx_pthread_config" = xno; then continue; fi
PTHREAD_CFLAGS="`pthread-config --cflags`"
PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
;;
*)
AC_MSG_CHECKING([for the pthreads library -l$flag])
PTHREAD_LIBS="-l$flag"
;;
esac
save_LIBS="$LIBS"
save_CFLAGS="$CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# Check for various functions. We must include pthread.h,
# since some functions may be macros. (On the Sequent, we
# need a special flag -Kthread to make this header compile.)
# We check for pthread_join because it is in -lpthread on IRIX
# while pthread_create is in libc. We check for pthread_attr_init
# due to DEC craziness with -lpthreads. We check for
# pthread_cleanup_push because it is one of the few pthread
# functions on Solaris that doesn't have a non-functional libc stub.
# We try pthread_create on general principles.
AC_TRY_LINK([#include ],
[pthread_t th; pthread_join(th, 0);
pthread_attr_init(0); pthread_cleanup_push(0, 0);
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[acx_pthread_ok=yes])
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
AC_MSG_RESULT($acx_pthread_ok)
if test "x$acx_pthread_ok" = xyes; then
break;
fi
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
done
fi
# Various other checks:
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save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
AC_MSG_CHECKING([for joinable pthread attribute])
attr_name=unknown
for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
AC_TRY_LINK([#include ], [int attr=$attr; return attr;],
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AC_MSG_RESULT($attr_name)
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AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
[Define to necessary symbol if this constant
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fi
AC_MSG_CHECKING([if more special flags are required for pthreads])
flag=no
case "${host_cpu}-${host_os}" in
*-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
*solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
esac
AC_MSG_RESULT(${flag})
if test "x$flag" != xno; then
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LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
# More AIX lossage: must compile with xlc_r or cc_r
if test x"$GCC" != xyes; then
AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC})
else
PTHREAD_CC=$CC
fi
else
PTHREAD_CC="$CC"
fi
AC_SUBST(PTHREAD_LIBS)
AC_SUBST(PTHREAD_CFLAGS)
AC_SUBST(PTHREAD_CC)
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$acx_pthread_ok" = xyes; then
ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
:
else
acx_pthread_ok=no
$2
fi
AC_LANG_RESTORE
])dnl ACX_PTHREAD
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/m4/attributes.m4 0000664 0000000 0000000 00000023156 15116374247 0023212 0 ustar 00root root 0000000 0000000 dnl Macros to check the presence of generic (non-typed) symbols.
dnl Copyright (c) 2006-2008 Diego Pettenò
dnl Copyright (c) 2006-2008 xine project
dnl Copyright (c) 2012 Lucas De Marchi
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2, or (at your option)
dnl any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
dnl 02110-1301, USA.
dnl
dnl As a special exception, the copyright owners of the
dnl macro gives unlimited permission to copy, distribute and modify the
dnl configure scripts that are the output of Autoconf when processing the
dnl Macro. You need not follow the terms of the GNU General Public
dnl License when using or distributing such scripts, even though portions
dnl of the text of the Macro appear in them. The GNU General Public
dnl License (GPL) does govern all other use of the material that
dnl constitutes the Autoconf Macro.
dnl
dnl This special exception to the GPL applies to versions of the
dnl Autoconf Macro released by this project. When you make and
dnl distribute a modified version of the Autoconf Macro, you may extend
dnl this special exception to the GPL to apply to your modified version as
dnl well.
dnl Check if FLAG in ENV-VAR is supported by compiler and append it
dnl to WHERE-TO-APPEND variable
dnl CC_CHECK_FLAG_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG])
AC_DEFUN([CC_CHECK_FLAG_APPEND], [
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AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
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dnl CC_CHECK_FLAGS_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG1 FLAG2])
AC_DEFUN([CC_CHECK_FLAGS_APPEND], [
for flag in $3; do
CC_CHECK_FLAG_APPEND($1, $2, $flag)
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dnl Check if the flag is supported by linker (cacheable)
dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
AC_DEFUN([CC_CHECK_LDFLAGS], [
AC_CACHE_CHECK([if $CC supports $1 flag],
AS_TR_SH([cc_cv_ldflags_$1]),
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LDFLAGS="$LDFLAGS $1"
AC_LINK_IFELSE([int main() { return 1; }],
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LDFLAGS="$ac_save_LDFLAGS"
])
AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
[$2], [$3])
])
dnl define the LDFLAGS_NOUNDEFINED variable with the correct value for
dnl the current linker to avoid undefined references in a shared object.
AC_DEFUN([CC_NOUNDEFINED], [
dnl We check $host for which systems to enable this for.
AC_REQUIRE([AC_CANONICAL_HOST])
case $host in
dnl FreeBSD (et al.) does not complete linking for shared objects when pthreads
dnl are requested, as different implementations are present; to avoid problems
dnl use -Wl,-z,defs only for those platform not behaving this way.
*-freebsd* | *-openbsd*) ;;
*)
dnl First of all check for the --no-undefined variant of GNU ld. This allows
dnl for a much more readable commandline, so that people can understand what
dnl it does without going to look for what the heck -z defs does.
for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
break
done
;;
esac
AC_SUBST([LDFLAGS_NOUNDEFINED])
])
dnl Check for a -Werror flag or equivalent. -Werror is the GCC
dnl and ICC flag that tells the compiler to treat all the warnings
dnl as fatal. We usually need this option to make sure that some
dnl constructs (like attributes) are not simply ignored.
dnl
dnl Other compilers don't support -Werror per se, but they support
dnl an equivalent flag:
dnl - Sun Studio compiler supports -errwarn=%all
AC_DEFUN([CC_CHECK_WERROR], [
AC_CACHE_CHECK(
[for $CC way to treat warnings as errors],
[cc_cv_werror],
[CC_CHECK_CFLAGS_SILENT([-Werror], [cc_cv_werror=-Werror],
[CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all])])
])
])
AC_DEFUN([CC_CHECK_ATTRIBUTE], [
AC_REQUIRE([CC_CHECK_WERROR])
AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2]) ))],
AS_TR_SH([cc_cv_attribute_$1]),
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([$3])],
[eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"],
[eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
CFLAGS="$ac_save_CFLAGS"
])
AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],
[AC_DEFINE(
AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,
[Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]
)
$4],
[$5])
])
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
CC_CHECK_ATTRIBUTE(
[constructor],,
[void __attribute__((constructor)) ctor() { int a; }],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
CC_CHECK_ATTRIBUTE(
[format], [format(printf, n, n)],
[void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
CC_CHECK_ATTRIBUTE(
[format_arg], [format_arg(printf)],
[char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
CC_CHECK_ATTRIBUTE(
[visibility_$1], [visibility("$1")],
[void __attribute__((visibility("$1"))) $1_function() { }],
[$2], [$3])
])
AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
CC_CHECK_ATTRIBUTE(
[nonnull], [nonnull()],
[void __attribute__((nonnull())) some_function(void *foo, void *bar) { foo = (void*)0; bar = (void*)0; }],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
CC_CHECK_ATTRIBUTE(
[unused], ,
[void some_function(void *foo, __attribute__((unused)) void *bar);],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
CC_CHECK_ATTRIBUTE(
[sentinel], ,
[void some_function(void *foo, ...) __attribute__((sentinel));],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
CC_CHECK_ATTRIBUTE(
[deprecated], ,
[void some_function(void *foo, ...) __attribute__((deprecated));],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
CC_CHECK_ATTRIBUTE(
[alias], [weak, alias],
[void other_function(void *foo) { }
void some_function(void *foo) __attribute__((weak, alias("other_function")));],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_MALLOC], [
CC_CHECK_ATTRIBUTE(
[malloc], ,
[void * __attribute__((malloc)) my_alloc(int n);],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_PACKED], [
CC_CHECK_ATTRIBUTE(
[packed], ,
[struct astructure { char a; int b; long c; void *d; } __attribute__((packed));],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_CONST], [
CC_CHECK_ATTRIBUTE(
[const], ,
[int __attribute__((const)) twopow(int n) { return 1 << n; } ],
[$1], [$2])
])
AC_DEFUN([CC_FLAG_VISIBILITY], [
AC_REQUIRE([CC_CHECK_WERROR])
AC_CACHE_CHECK([if $CC supports -fvisibility=hidden],
[cc_cv_flag_visibility],
[cc_flag_visibility_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden],
cc_cv_flag_visibility='yes',
cc_cv_flag_visibility='no')
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
[AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1,
[Define this if the compiler supports the -fvisibility flag])
$1],
[$2])
])
AC_DEFUN([CC_FUNC_EXPECT], [
AC_REQUIRE([CC_CHECK_WERROR])
AC_CACHE_CHECK([if compiler has __builtin_expect function],
[cc_cv_func_expect],
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
AC_COMPILE_IFELSE([AC_LANG_SOURCE(
[int some_function() {
int a = 3;
return (int)__builtin_expect(a, 3);
}])],
[cc_cv_func_expect=yes],
[cc_cv_func_expect=no])
CFLAGS="$ac_save_CFLAGS"
])
AS_IF([test "x$cc_cv_func_expect" = "xyes"],
[AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1,
[Define this if the compiler supports __builtin_expect() function])
$1],
[$2])
])
AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
AC_REQUIRE([CC_CHECK_WERROR])
AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],
[cc_cv_attribute_aligned],
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
for cc_attribute_align_try in 64 32 16 8 4 2; do
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
int main() {
static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0;
return c;
}])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
done
CFLAGS="$ac_save_CFLAGS"
])
if test "x$cc_cv_attribute_aligned" != "x"; then
AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned],
[Define the highest alignment supported])
fi
])
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/meson.build 0000664 0000000 0000000 00000011473 15116374247 0022403 0 ustar 00root root 0000000 0000000 project(
'rtkit', 'c',
version: '0.14',
license: 'GPL3',
meson_version: '>=0.58.0',
default_options: ['c_std=c99', 'warning_level=2'],
)
add_project_arguments(
'-D_GNU_SOURCE', '-DHAVE_CONFIG_H',
language: 'c'
)
cc = meson.get_compiler('c')
sh = find_program('sh')
xxd = find_program('xxd', required: false)
all_warnings = [
'-Wno-unused-parameter',
]
supported_warnings = cc.get_supported_arguments(all_warnings)
add_project_arguments(supported_warnings, language: 'c')
dbus_dep = dependency('dbus-1')
libcap_dep = dependency('libcap')
libsystemd_dep = dependency('libsystemd', required: get_option('libsystemd'))
polkit_dep = dependency('polkit-gobject-1', required: false)
systemd_dep = dependency('systemd', required: false)
thread_dep = dependency('threads')
librt_dep = cc.find_library('rt')
cc.check_header('sched.h', dependencies: librt_dep)
cc.has_function('sched_setscheduler', dependencies: librt_dep)
libexecdir = get_option('libexecdir')
testsdir = get_option('libexecdir') / 'installed-tests' / meson.project_name()
busservicedir = get_option('dbus_systemservicedir')
if busservicedir == ''
busservicedir = dbus_dep.get_variable(
'system_bus_services_dir',
default_value: get_option('datadir') / 'dbus-1' / 'system-services',
)
endif
interfacedir = get_option('dbus_interfacedir')
if interfacedir == ''
interfacedir = dbus_dep.get_variable(
'interfaces_dir',
default_value: get_option('datadir') / 'dbus-1' / 'interfaces',
)
endif
rulesdir = get_option('dbus_rulesdir')
if rulesdir == ''
rulesdir = get_option('datadir') / 'dbus-1' / 'system.d'
endif
policydir = get_option('polkit_actiondir')
if policydir == '' and polkit_dep.found()
policydir = polkit_dep.get_variable('actiondir', default_value: '')
endif
if policydir == ''
policydir = get_option('datadir') / 'polkit-1' / 'actions'
endif
systemunitdir = get_option('systemd_systemunitdir')
if systemunitdir == '' and systemd_dep.found()
systemunitdir = systemd_dep.get_variable(
'systemdsystemunitdir',
default_value: '',
)
endif
if systemunitdir == ''
systemunitdir = get_option('libdir') / 'systemd' / 'system'
endif
sysusersdir = ''
if sysusersdir == '' and systemd_dep.found()
sysusersdir = systemd_dep.get_variable(
'sysusersdir',
default_value: '',
)
endif
if sysusersdir == ''
sysusersdir = get_option('libdir') / 'sysusers.d'
endif
config = configuration_data()
config.set('LIBEXECDIR', get_option('prefix') / libexecdir)
config.set_quoted('PACKAGE_VERSION', meson.project_version())
config.set('HAVE_LIBSYSTEMD', libsystemd_dep.found())
config_h = configure_file(
input: 'config.h.meson',
output: 'config.h',
configuration: config,
)
if xxd.found()
xml_introspection_h = configure_file(
input: 'org.freedesktop.RealtimeKit1.xml',
output: 'xml-introspection.h',
command: [
sh, '-c', '"$1" -i < "$2" > "$3"', sh,
xxd, '@INPUT@', '@OUTPUT@'
],
)
else
warning('xxd not found, cannot compile introspection XML. Looking for existing one...')
xml_introspection_h = files('xml-introspection.h')
endif
executable(
'rtkit-daemon',
'rtkit-daemon.c', 'rtkit.c', 'rtkit.h', config_h, xml_introspection_h,
dependencies: [
dbus_dep,
libcap_dep,
librt_dep,
libsystemd_dep,
thread_dep
],
install: true,
install_dir: libexecdir,
)
executable(
'rtkit-test',
'rtkit-test.c', 'rtkit.c', 'rtkit.h', config_h,
dependencies: [dbus_dep, librt_dep],
install: get_option('installed_tests'),
install_dir: testsdir,
)
executable(
'rtkitctl',
'rtkitctl.c', 'rtkit.h', config_h,
install: true,
install_dir: get_option('sbindir'),
dependencies: [dbus_dep],
)
install_man('rtkitctl.8')
install_data('org.freedesktop.RealtimeKit1.xml', install_dir: interfacedir)
install_data('org.freedesktop.RealtimeKit1.conf', install_dir: rulesdir)
install_data('org.freedesktop.RealtimeKit1.policy', install_dir: policydir)
configure_file(
input: 'org.freedesktop.RealtimeKit1.service.in',
output: 'org.freedesktop.RealtimeKit1.service',
configuration: config,
install_dir: busservicedir,
)
configure_file(
input: 'rtkit-daemon.service.in',
output: 'rtkit-daemon.service',
configuration: config,
install_dir: systemunitdir,
)
install_data(
'rtkit.sysusers',
rename: 'rtkit.conf',
install_dir: sysusersdir,
)
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/meson_options.txt 0000664 0000000 0000000 00000001753 15116374247 0023676 0 ustar 00root root 0000000 0000000 option(
'dbus_interfacedir',
type: 'string',
value: '',
description: 'Directory for D-Bus interface definitions',
)
option(
'dbus_rulesdir',
type: 'string',
value: '',
description: 'Directory for D-Bus system bus policy rules',
)
option(
'dbus_systemservicedir',
type: 'string',
value: '',
description: 'Directory for D-Bus system services',
)
option(
'libsystemd',
type: 'feature',
value: 'auto',
description: 'Use the libsystemd sd-daemon API to communicate with systemd'
)
option(
'polkit_actiondir',
type: 'string',
value: '',
description: 'Directory for Polkit actions',
)
option(
'systemd_systemunitdir',
type: 'string',
value: '',
description: 'Directory for systemd system units',
)
option(
'installed_tests',
type: 'boolean',
value: true,
description: 'Install tests'
)
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/org.freedesktop.RealtimeKit1.conf 0000664 0000000 0000000 00000003305 15116374247 0026476 0 ustar 00root root 0000000 0000000
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/org.freedesktop.RealtimeKit1.policy 0000664 0000000 0000000 00000003371 15116374247 0027053 0 ustar 00root root 0000000 0000000
Lennart Poettering
Grant high priority scheduling to a user process
Bir sürece yüksek öncelikli çalışabilme yetkisi ver
Authentication is required to grant an application high priority scheduling
Sürecin yüksek öncelikli çalıştırılabilmesi için yetki gerekiyor
no
yes
yes
Grant realtime scheduling to a user process
Bir sürece gerçek zamanlı çalışabilme yetkisi ver
Authentication is required to grant an application realtime scheduling
Sürecin gerçek zamanlı çalıştırılabilmesi için yetki gerekiyor
no
yes
yes
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/org.freedesktop.RealtimeKit1.service.in 0000664 0000000 0000000 00000001501 15116374247 0027612 0 ustar 00root root 0000000 0000000 # This file is part of RealtimeKit.
#
# Copyright 2009 Lennart Poettering
#
# RealtimeKit is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# RealtimeKit is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with RealtimeKit. If not, see .
[D-BUS Service]
Name=org.freedesktop.RealtimeKit1
Exec=@LIBEXECDIR@/rtkit-daemon
SystemdService=rtkit-daemon.service
User=root
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/org.freedesktop.RealtimeKit1.xml 0000664 0000000 0000000 00000004724 15116374247 0026357 0 ustar 00root root 0000000 0000000
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkit-daemon.c 0000664 0000000 0000000 00000272516 15116374247 0023012 0 ustar 00root root 0000000 0000000 /*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of RealtimeKit.
Copyright 2009 Lennart Poettering
Copyright 2010 Maarten Lankhorst
RealtimeKit is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
RealtimeKit is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with RealtimeKit. If not, see .
***/
#ifdef HAVE_CONFIG_H
#include
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#ifdef HAVE_LIBSYSTEMD
#include
#endif
#include "rtkit.h"
#ifndef __linux__
#error "This stuff only works on Linux!"
#endif
#ifndef SCHED_RESET_ON_FORK
/* "Your libc lacks the definition of SCHED_RESET_ON_FORK. We'll now define it ourselves, however make sure your kernel is new enough! */
#define SCHED_RESET_ON_FORK 0x40000000
#endif
#ifndef RLIMIT_RTTIME
#define RLIMIT_RTTIME 15
#endif
/* The introspection XML from org.freedesktop.RealtimeKit1.xml */
static const char introspect_xml[] = {
#include "xml-introspection.h"
,0x00};
/* Similar to assert(), but has side effects, and hence shall never be optimized away, regardless of NDEBUG */
#define assert_se(expr) \
do { \
if (__builtin_expect(!(expr), 0)) { \
fprintf(stderr, "Assertion %s failed at %s:%u, function %s(). Aborting.\n", #expr, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
abort(); \
} \
} while(0)
#define ELEMENTSOF(x) (sizeof(x)/sizeof(x[0]))
#define TIMESPEC_MSEC(ts) (((int64_t) (ts).tv_sec * 1000LL) + ((int64_t) (ts).tv_nsec / 1000000LL))
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif
/* If we actually execute a request we temporarily upgrade our realtime priority to this level */
static unsigned our_realtime_priority = 21;
/* Normally we run at this nice level */
static int our_nice_level = 1;
/* The maximum realtime priority to hand out */
static unsigned max_realtime_priority = 20;
/* The minimum nice level to hand out */
static int min_nice_level = -15;
/* Username we shall run under */
static const char *username = "rtkit";
/* Enforce that clients have RLIMIT_RTTIME set to a value <= this */
static unsigned long long rttime_usec_max = 200000ULL; /* 200 ms */
/* How many users do we supervise at max? */
static unsigned users_max = 2048;
/* How many processes of a single user do we supervise at max? */
static unsigned processes_per_user_max = 15;
/* How many threads of a single user do we supervise at max? */
static unsigned threads_per_user_max = 25;
/* Refuse further requests if one user issues more than ACTIONS_PER_BURST_MAX in this time */
static unsigned actions_burst_sec = 20;
/* Refuse further requests if one user issues more than this many in ACTIONS_BURST_SEC time */
static unsigned actions_per_burst_max = 25;
/* Drop privileges */
static bool do_drop_privileges = TRUE;
/* Change root directory to /proc */
static bool do_chroot = TRUE;
/* Limit resources */
static bool do_limit_resources = TRUE;
/* Run a canary watchdog */
static bool do_canary = TRUE;
/* Canary cheep interval */
static unsigned canary_cheep_msec = 5000; /* 5s */
/* Canary watchdog interval */
static unsigned canary_watchdog_msec = 10000; /* 10s */
/* Watchdog realtime priority */
static unsigned canary_watchdog_realtime_priority = 99;
/* How long after the canary died shall we refuse further RT requests? */
static unsigned canary_refusal_sec = 5*60;
/* Demote root processes? */
static bool canary_demote_root = FALSE;
/* Demote unknown processes? */
static bool canary_demote_unknown = FALSE;
/* Log to stderr? */
static bool log_stderr = FALSE;
/* Also log debugging messages? */
static bool log_debug = FALSE;
/* Scheduling policy to use */
static int sched_policy = SCHED_RR;
/* Current suspend state */
static bool suspended = FALSE;
/* Logind sleep inhibitor pipefd */
static int inhibit_sleep_fd = -1;
struct thread {
/* We use the thread id plus its starttime as a unique identifier for threads */
pid_t pid;
unsigned long long starttime;
unsigned priority;
int nice_level;
struct thread *next;
};
struct process {
/* We use the process id plus its starttime as a unique identifier for processes */
pid_t pid;
unsigned long long starttime;
struct thread *threads;
struct process *next;
};
struct rtkit_user {
uid_t uid;
time_t timestamp;
unsigned n_actions;
struct process *processes;
unsigned n_processes;
unsigned n_threads;
struct rtkit_user *next;
};
static struct rtkit_user *users = NULL;
static unsigned n_users = 0;
static unsigned n_total_processes = 0;
static unsigned n_total_threads = 0;
static const char *proc = NULL;
static int quit_fd = -1, canary_fd = -1;
static pthread_t canary_thread_id = 0, watchdog_thread_id = 0;
static volatile uint32_t refuse_until = 0;
static int start_canary(void);
static void stop_canary(void);
static const char *get_proc_path(void) {
/* Useful for chroot environments */
if (proc)
return proc;
return "/proc";
}
static char* get_user_name(uid_t uid, char *user, size_t len) {
struct passwd *pw;
if ((pw = getpwuid(uid))) {
strncpy(user, pw->pw_name, len-1);
user[len-1] = 0;
return user;
}
snprintf(user, len-1, "%llu", (unsigned long long) uid);
user[len-1] = 0;
return user;
}
static int read_starttime(pid_t pid, pid_t tid, unsigned long long *st) {
char fn[128], line[256], *p;
int r;
FILE *f;
if (tid != 0)
assert_se(snprintf(fn, sizeof(fn)-1, "%s/%llu/task/%llu/stat", get_proc_path(), (unsigned long long) pid, (unsigned long long) tid) < (int) (sizeof(fn)-1));
else
assert_se(snprintf(fn, sizeof(fn)-1, "%s/%llu/stat", get_proc_path(), (unsigned long long) pid) < (int) (sizeof(fn)-1));
fn[sizeof(fn)-1] = 0;
if (!(f = fopen(fn, "r")))
return -errno;
if (!(fgets(line, sizeof(line), f))) {
r = -errno;
fclose(f);
return r;
}
fclose(f);
/* Let's skip the pid and comm fields. The latter is enclosed
* in () but does not escape any () in its value, so let's
* skip over it manually */
if (!(p = strrchr(line, ')')))
return -EIO;
p++;
if (sscanf(p, " "
"%*c " /* state */
"%*d " /* ppid */
"%*d " /* pgrp */
"%*d " /* session */
"%*d " /* tty_nr */
"%*d " /* tpgid */
"%*u " /* flags */
"%*u " /* minflt */
"%*u " /* cminflt */
"%*u " /* majflt */
"%*u " /* cmajflt */
"%*u " /* utime */
"%*u " /* stime */
"%*d " /* cutime */
"%*d " /* cstime */
"%*d " /* priority */
"%*d " /* nice */
"%*d " /* num_threads */
"%*d " /* itrealvalue */
"%llu " /* starttime */,
st) != 1)
return -EIO;
return 0;
}
static void free_thread(struct thread *t) {
free(t);
}
static void free_process(struct process *p) {
struct thread *t;
while ((t = p->threads)) {
p->threads = t->next;
free_thread(t);
}
free(p);
}
static void free_user(struct rtkit_user *u) {
struct process *p;
while ((p = u->processes)) {
u->processes = p->next;
free_process(p);
}
free(u);
}
static bool user_in_burst(struct rtkit_user *u) {
time_t now = time(NULL);
return now < u->timestamp + (time_t) actions_burst_sec;
}
static bool verify_burst(struct rtkit_user *u) {
if (!user_in_burst(u)) {
/* Restart burst phase */
time(&u->timestamp);
u->n_actions = 0;
return true;
}
if (u->n_actions >= actions_per_burst_max) {
char user[64];
syslog(LOG_WARNING, "Warning: Reached burst limit for user '%s', denying request.\n", get_user_name(u->uid, user, sizeof(user)));
return false;
}
u->n_actions++;
return true;
}
static int find_user(struct rtkit_user **_u, uid_t uid) {
struct rtkit_user *u;
for (u = users; u; u = u->next)
if (u->uid == uid) {
*_u = u;
return 0;
}
if (n_users >= users_max) {
syslog(LOG_WARNING, "Warning: Reached maximum concurrent user limit, denying request.\n");
return -EBUSY;
}
if (!(u = malloc(sizeof(struct rtkit_user))))
return -ENOMEM;
u->uid = uid;
u->timestamp = time(NULL);
u->n_actions = 0;
u->processes = NULL;
u->n_processes = u->n_threads = 0;
u->next = users;
users = u;
n_users++;
*_u = u;
return 0;
}
static int find_process(struct process** _p, struct rtkit_user *u, pid_t pid, unsigned long long starttime) {
struct process *p;
for (p = u->processes; p; p = p->next)
if (p->pid == pid && p->starttime == starttime) {
*_p = p;
return 0;
}
if (u->n_processes >= processes_per_user_max) {
char user[64];
syslog(LOG_WARNING, "Warning: Reached maximum concurrent process limit for user '%s', denying request.\n", get_user_name(u->uid, user, sizeof(user)));
return -EBUSY;
}
if (!(p = malloc(sizeof(struct process))))
return -ENOMEM;
p->pid = pid;
p->starttime = starttime;
p->threads = NULL;
p->next = u->processes;
u->processes = p;
u->n_processes++;
n_total_processes++;
*_p = p;
return 0;
}
static int find_thread(struct thread** _t, struct rtkit_user *u, struct process *p, pid_t pid, unsigned long long starttime) {
struct thread *t;
for (t = p->threads; t; t = t->next)
if (t->pid == pid && t->starttime == starttime) {
*_t = t;
return 0;
}
if (u->n_threads >= threads_per_user_max) {
char user[64];
syslog(LOG_WARNING, "Warning: Reached maximum concurrent threads limit for user '%s', denying request.\n", get_user_name(u->uid, user, sizeof(user)));
return -EBUSY;
}
if (!(t = malloc(sizeof(struct thread))))
return -ENOMEM;
t->pid = pid;
t->starttime = starttime;
t->next = p->threads;
t->priority = (unsigned) -1;
t->nice_level = 0;
p->threads = t;
u->n_threads++;
n_total_threads++;
*_t = t;
return 0;
}
static bool thread_relevant(struct process *p, struct thread *t, bool reset) {
unsigned long long st;
int r;
/* This checks if a thread still matters to us, i.e. if its
* PID still refers to the same thread and if it is still high
* priority or real time */
if ((r = read_starttime(p->pid, t->pid, &st)) < 0) {
/* Did the thread die? */
if (r == -ENOENT)
return FALSE;
syslog(LOG_WARNING, "Warning: failed to read start time: %s\n", strerror(-r));
return FALSE;
}
/* Did the thread get replaced by another thread? */
if (st != t->starttime)
return FALSE;
/* If suspended, don't verify scheduling unless it's a reset. */
if (suspended && !reset)
return TRUE;
if ((r = sched_getscheduler(t->pid)) < 0) {
/* Maybe it died right now? */
if (errno == ESRCH)
return FALSE;
syslog(LOG_WARNING, "Warning: failed to read scheduler policy: %s\n", strerror(errno));
return FALSE;
}
/* Is this a realtime thread? */
r &= ~SCHED_RESET_ON_FORK;
if (r == SCHED_RR || r == SCHED_FIFO)
return TRUE;
errno = 0;
r = getpriority(PRIO_PROCESS, t->pid);
if (errno != 0) {
/* Maybe it died right now? */
if (errno == ESRCH)
return FALSE;
syslog(LOG_WARNING, "Warning: failed to read nice level: %s\n", strerror(errno));
return FALSE;
}
/* Is this a high priority thread? */
if (r < 0)
return TRUE;
return FALSE;
}
static void thread_gc(struct rtkit_user *u, struct process *p, bool reset) {
struct thread *t, *n, *l;
/* Cleanup dead theads of a specific user we don't need to keep track about anymore */
for (l = NULL, t = p->threads; t; t = n) {
n = t->next;
if (!thread_relevant(p, t, reset)) {
free_thread(t);
if (l)
l->next = n;
else
p->threads = n;
assert(u->n_threads >= 1);
u->n_threads--;
assert(n_total_threads >= 1);
n_total_threads--;
} else
l = t;
}
assert(!p->threads || u->n_threads);
}
static void process_gc(struct rtkit_user *u, bool reset) {
struct process *p, *n, *l;
/* Cleanup dead processes of a specific user we don't need to keep track about anymore */
for (l = NULL, p = u->processes; p; p = n) {
n = p->next;
thread_gc(u, p, reset);
if (!p->threads) {
free_process(p);
if (l)
l->next = n;
else
u->processes = n;
assert(u->n_processes >= 1);
u->n_processes--;
assert(n_total_processes >= 1);
n_total_processes--;
} else
l = p;
}
assert(!u->processes == !u->n_processes);
}
static void user_gc(bool reset) {
struct rtkit_user *u, *n, *l;
/* Cleanup all users we don't need to keep track about anymore */
for (l = NULL, u = users; u; u = n) {
n = u->next;
process_gc(u, reset);
if (!u->processes && !user_in_burst(u)) {
free_user(u);
if (l)
l->next = n;
else
users = n;
assert(n_users >= 1);
n_users--;
} else
l = u;
}
assert(!users == !n_users);
}
static bool startswith(const char *s, const char *prefix) {
return strncmp(s, prefix, strlen(prefix)) == 0;
}
static int self_set_realtime(unsigned priority) {
struct sched_param param;
int r;
memset(¶m, 0, sizeof(param));
param.sched_priority = priority;
if (sched_setscheduler(0, sched_policy|SCHED_RESET_ON_FORK, ¶m) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to make ourselves RT: %s\n", strerror(errno));
goto finish;
}
r = 0;
finish:
return r;
}
static void self_drop_realtime(int nice_level) {
struct sched_param param;
memset(¶m, 0, sizeof(param));
if (sched_setscheduler(0, SCHED_OTHER, ¶m) < 0)
syslog(LOG_WARNING, "Warning: Failed to reset scheduling to SCHED_OTHER: %s\n", strerror(errno));
if (setpriority(PRIO_PROCESS, 0, nice_level) < 0)
syslog(LOG_WARNING, "Warning: Failed to reset nice level to %u: %s\n", our_nice_level, strerror(errno));
}
/* Verifies that RLIMIT_RTTIME is set for the specified process */
static int verify_process_rttime(struct process *p) {
char fn[128];
FILE *f;
int r;
bool good = false;
assert_se(snprintf(fn, sizeof(fn)-1, "%s/%llu/limits", get_proc_path(), (unsigned long long) p->pid) < (int) (sizeof(fn)-1));
fn[sizeof(fn)-1] = 0;
if (!(f = fopen(fn, "r"))) {
r = -errno;
syslog(LOG_ERR, "Failed to open '%s': %s\n", fn, strerror(errno));
return r;
}
for (;;) {
char line[128];
char soft[32], hard[32];
unsigned long long rttime;
char *e = NULL;
if (!fgets(line, sizeof(line), f))
break;
if (!startswith(line, "Max realtime timeout"))
continue;
if (sscanf(line + 20, "%s %s", soft, hard) != 2) {
syslog(LOG_WARNING, "Warning: parse failure in %s.\n", fn);
break;
}
errno = 0;
rttime = strtoll(hard, &e, 10);
if (errno != 0 || !e || *e != 0)
break;
if (rttime <= rttime_usec_max)
good = true;
break;
}
fclose(f);
return good ? 0 : -EPERM;
}
static int verify_process_user(struct rtkit_user *u, struct process *p) {
char fn[128];
int r;
struct stat st;
assert_se(snprintf(fn, sizeof(fn)-1, "%s/%llu", get_proc_path(), (unsigned long long) p->pid) < (int) (sizeof(fn)-1));
fn[sizeof(fn)-1] = 0;
memset(&st, 0, sizeof(st));
if (stat(fn, &st) < 0) {
r = -errno;
if (r != -ENOENT)
syslog(LOG_WARNING, "Warning: Failed to stat() file '%s': %s\n", fn, strerror(-r));
return r;
}
return st.st_uid == u->uid ? 0 : -EPERM;
}
static int verify_process_starttime(struct process *p) {
unsigned long long st;
int r;
if ((r = read_starttime(p->pid, 0, &st)) < 0) {
if (r != -ENOENT)
syslog(LOG_WARNING, "Warning: Failed to read start time of process %llu: %s\n", (unsigned long long) p->pid, strerror(-r));
return r;
}
return st == p->starttime ? 0 : -EPERM;
}
static int verify_thread_starttime(struct process *p, struct thread *t) {
unsigned long long st;
int r;
if ((r = read_starttime(p->pid, t->pid, &st)) < 0) {
if (r != -ENOENT)
syslog(LOG_WARNING, "Warning: Failed to read start time of thread %llu: %s\n", (unsigned long long) t->pid, strerror(-r));
return r;
}
return st == t->starttime ? 0 : -EPERM;
}
static int thread_reset(pid_t tid) {
struct sched_param param;
int r = 0;
memset(¶m, 0, sizeof(param));
param.sched_priority = 0;
if (sched_setscheduler(tid, SCHED_OTHER, ¶m) < 0) {
if (errno != ESRCH)
syslog(LOG_WARNING, "Warning: Failed to reset scheduling to SCHED_OTHER for thread %llu: %s\n", (unsigned long long) tid, strerror(errno));
r = -1;
}
if (setpriority(PRIO_PROCESS, tid, 0) < 0) {
if (errno != ESRCH)
syslog(LOG_WARNING, "Warning: Failed to reset nice level to 0 for thread %llu: %s\n", (unsigned long long) tid, strerror(errno));
r = -1;
}
return r;
}
static int process_set_realtime(struct rtkit_user *u, struct process *p, struct thread *t, unsigned priority) {
int r;
struct sched_param param;
char user[64];
if ((int) priority < sched_get_priority_min(sched_policy) ||
(int) priority > sched_get_priority_max(sched_policy))
return -EINVAL;
/* We always want to be able to get a higher RT priority than
* the client */
if (priority >= our_realtime_priority ||
priority > max_realtime_priority)
return -EPERM;
/* Temporarily become a realtime process. We do this to make
* sure that our verification code is not preempted by an evil
* client's code which might have gotten RT through
* us. */
if ((r = self_set_realtime(our_realtime_priority)) < 0)
return r;
/* Let's make sure that everything is alright before we make
* the process realtime */
if ((r = verify_process_user(u, p)) < 0 ||
(r = verify_process_starttime(p)) < 0 ||
(r = verify_process_rttime(p)) < 0 ||
(r = verify_thread_starttime(p, t)) < 0)
goto finish;
/* Ok, everything seems to be in order, now, let's do it */
memset(¶m, 0, sizeof(param));
param.sched_priority = (int) priority;
if (sched_setscheduler(t->pid, sched_policy|SCHED_RESET_ON_FORK, ¶m) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to make thread %llu RT: %s\n", (unsigned long long) t->pid, strerror(errno));
goto finish;
}
/* We do some sanity checks afterwards, to verify that the
* caller didn't play games with us and replaced the process
* behind the PID */
if ((r = verify_thread_starttime(p, t)) < 0 ||
(r = verify_process_rttime(p)) < 0 ||
(r = verify_process_starttime(p)) < 0 ||
(r = verify_process_user(u, p)) < 0) {
thread_reset(t->pid);
goto finish;
}
syslog(LOG_INFO, "Successfully made thread %llu of process %llu owned by '%s' RT at priority %u.\n",
(unsigned long long) t->pid,
(unsigned long long) p->pid,
get_user_name(u->uid, user, sizeof(user)),
priority);
r = 0;
finish:
self_drop_realtime(our_nice_level);
return r;
}
static int process_set_realtime_request(struct rtkit_user *u, struct process *p, struct thread *t, int priority) {
int r;
/* Make sure users don't flood us with requests */
if (!verify_burst(u))
return -EBUSY;
if (suspended)
return -EBUSY;
if (!(r = process_set_realtime(u, p, t, priority)))
t->priority = priority;
return r;
}
static int process_set_high_priority(struct rtkit_user *u, struct process *p, struct thread *t, int nice_level) {
int r;
struct sched_param param;
char user[64];
if (nice_level < PRIO_MIN || nice_level >= PRIO_MAX)
return -EINVAL;
if (nice_level < min_nice_level)
return -EPERM;
/* Temporarily become a realtime process */
if ((r = self_set_realtime(our_realtime_priority)) < 0)
return r;
/* Let's make sure that everything is alright before we make
* the process high priority */
if ((r = verify_process_user(u, p)) < 0 ||
(r = verify_process_starttime(p)) < 0 ||
(r = verify_thread_starttime(p, t)) < 0)
goto finish;
/* Ok, everything seems to be in order, now, let's do it */
memset(¶m, 0, sizeof(param));
param.sched_priority = 0;
if (sched_setscheduler(t->pid, SCHED_OTHER|SCHED_RESET_ON_FORK, ¶m) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to make process %llu SCHED_NORMAL: %s\n", (unsigned long long) t->pid, strerror(errno));
goto finish;
}
if (setpriority(PRIO_PROCESS, t->pid, nice_level) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to set nice level of process %llu to %i: %s\n", (unsigned long long) t->pid, nice_level, strerror(errno));
goto finish;
}
if ((r = verify_thread_starttime(p, t)) < 0 ||
(r = verify_process_starttime(p)) < 0 ||
(r = verify_process_user(u, p)) < 0) {
thread_reset(t->pid);
goto finish;
}
syslog(LOG_INFO, "Successfully made thread %llu of process %llu owned by '%s' high priority at nice level %i.\n",
(unsigned long long) t->pid,
(unsigned long long) p->pid,
get_user_name(u->uid, user, sizeof(user)),
nice_level);
r = 0;
finish:
self_drop_realtime(our_nice_level);
return r;
}
static int process_set_high_priority_request(struct rtkit_user *u, struct process *p, struct thread *t, int nice_level) {
int r;
/* Make sure users don't flood us with requests */
if (!verify_burst(u))
return -EBUSY;
if (suspended)
return -EBUSY;
if (!(r = process_set_high_priority(u, p, t, nice_level)))
t->nice_level = nice_level;
return r;
}
static int thread_resume(struct rtkit_user *u, struct process *p, struct thread *t) {
if (t->priority != (unsigned) -1)
return process_set_realtime(u, p, t, t->priority);
else
return process_set_high_priority(u, p, t, t->nice_level);
}
static void reset_known(void) {
struct rtkit_user *u;
struct process *p;
struct thread *t;
unsigned n_demoted = 0;
syslog(LOG_INFO, "Demoting known real-time threads.\n");
for (u = users; u; u = u->next)
for (p = u->processes; p; p = p->next)
for (t = p->threads; t; t = t->next)
if (verify_process_user(u, p) >= 0 &&
verify_process_starttime(p) >= 0 &&
verify_thread_starttime(p, t) >= 0)
if (thread_reset(t->pid) >= 0) {
syslog(LOG_NOTICE, "Successfully demoted thread %llu of process %llu.\n",
(unsigned long long) t->pid,
(unsigned long long) p->pid);
n_demoted++;
}
syslog(LOG_NOTICE, "Demoted %u threads.\n", n_demoted);
}
static int reset_all(void) {
DIR *pd;
int r;
unsigned n_demoted = 0;
/* Goes through /proc and demotes *all* threads to
* SCHED_OTHER */
syslog(LOG_INFO, "Demoting known and unknown real-time threads.\n");
if (!(pd = opendir(get_proc_path()))) {
r = -errno;
syslog(LOG_ERR, "opendir(%s) failed: %s\n", get_proc_path(), strerror(errno));
return r;
}
for (;;) {
const struct dirent *pde;
char *e = NULL;
unsigned long long pid;
char fn[128];
DIR *td;
struct stat st;
if (!(pde = readdir(pd)))
break;
if (!(pde->d_type & DT_DIR))
continue;
errno = 0;
pid = strtoull(pde->d_name, &e, 10);
if (errno != 0 || !e || *e != 0)
continue;
if ((pid_t) pid == getpid() ||
pid == 1)
continue;
assert_se(snprintf(fn, sizeof(fn)-1, "%s/%llu", get_proc_path(), pid) < (int) (sizeof(fn)-1));
fn[sizeof(fn)-1] = 0;
if (stat(fn, &st) < 0) {
if (errno != ENOENT)
syslog(LOG_WARNING, "Warning: stat(%s) failed: %s\n", fn, strerror(errno));
continue;
}
if (!S_ISDIR(st.st_mode))
continue;
if (!canary_demote_root && st.st_uid == 0)
continue;
assert_se(snprintf(fn, sizeof(fn)-1, "%s/%llu/task", get_proc_path(), pid) < (int) (sizeof(fn)-1));
fn[sizeof(fn)-1] = 0;
if (!(td = opendir(fn)))
continue;
for (;;) {
const struct dirent *tde;
unsigned long long tid;
if (!(tde = readdir(td)))
break;
if (!(tde->d_type & DT_DIR))
continue;
e = NULL;
errno = 0;
tid = strtoull(tde->d_name, &e, 10);
if (errno != 0 || !e || *e != 0)
continue;
if ((r = sched_getscheduler(tid)) < 0) {
if (errno != ESRCH)
syslog(LOG_WARNING, "Warning: sched_getscheduler() failed: %s\n", strerror(errno));
continue;
}
if (r == SCHED_FIFO || r == SCHED_RR ||
r == (SCHED_FIFO|SCHED_RESET_ON_FORK) || r == (SCHED_RR|SCHED_RESET_ON_FORK))
if (thread_reset((pid_t) tid) >= 0) {
syslog(LOG_NOTICE, "Successfully demoted thread %llu of process %llu.\n",
(unsigned long long) tid,
(unsigned long long) pid);
n_demoted++;
}
}
closedir(td);
}
closedir(pd);
syslog(LOG_NOTICE, "Demoted %u threads.\n", n_demoted);
return 0;
}
static void suspend(void) {
if (suspended)
return ;
suspended = TRUE;
stop_canary();
reset_known();
}
static void resume(void) {
struct rtkit_user *u;
struct process *p;
struct thread *t;
unsigned n_resumed = 0;
if (!suspended)
return;
syslog(LOG_INFO, "Resuming known real-time threads.\n");
/* It is not possible for there to be more resumable processes and
* threads than user limits, as suspended processes and threads can
* only be created when non-suspended, subject to normal enforcement.
*/
for (u = users; u; u = u->next) {
/* Force restart burst phase, extending time window. */
time(&u->timestamp);
for (p = u->processes; p; p = p->next) {
for (t = p->threads; t; t = t->next) {
if (thread_resume(u, p, t) >= 0) {
n_resumed++;
}
}
}
}
syslog(LOG_NOTICE, "Resumed scheduling %u threads.\n", n_resumed);
start_canary();
suspended = FALSE;
}
static int logind_inhibit_sleep(DBusConnection *connection) {
DBusError error;
DBusMessage *m, *r;
const char *arg_what = "sleep";
const char *arg_who = "Realtime Kit";
const char *arg_why = "Demote realtime scheduling and stop canary.";
const char *arg_mode = "delay";
int fd = -1;
dbus_error_init(&error);
assert_se(m = dbus_message_new_method_call(
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"Inhibit"));
assert_se(dbus_message_append_args(
m,
DBUS_TYPE_STRING, &arg_what,
DBUS_TYPE_STRING, &arg_who,
DBUS_TYPE_STRING, &arg_why,
DBUS_TYPE_STRING, &arg_mode,
DBUS_TYPE_INVALID));
r = dbus_connection_send_with_reply_and_block(connection, m, -1, &error);
dbus_message_unref(m);
if (!r)
goto finish;
if (dbus_set_error_from_message(&error, r)) {
syslog(LOG_NOTICE, "Could not setup logind system-suspend handling: %s", error.message);
goto finish;
}
if (!dbus_message_get_args(
r, &error,
DBUS_TYPE_UNIX_FD, &fd,
DBUS_TYPE_INVALID)) {
syslog(LOG_DEBUG, "Failed to parse inhibit sleep reply: %s", error.message);
}
finish:
if (r)
dbus_message_unref(r);
dbus_error_free(&error);
return fd;
}
/* This mimics dbus_bus_get_unix_user() */
static unsigned long get_unix_process_id(
DBusConnection *connection,
const char *name,
DBusError *error) {
DBusMessage *m, *r;
uint32_t pid = (uint32_t) -1;
assert_se(m = dbus_message_new_method_call(
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetConnectionUnixProcessID"));
assert_se(dbus_message_append_args(
m,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID));
r = dbus_connection_send_with_reply_and_block(connection, m, -1, error);
dbus_message_unref (m);
if (!r)
goto finish;
if (dbus_set_error_from_message(error, r))
goto finish;
if (!dbus_message_get_args(
r, error,
DBUS_TYPE_UINT32, &pid,
DBUS_TYPE_INVALID)) {
pid = (uint32_t) -1;
goto finish;
}
finish:
if (r)
dbus_message_unref(r);
return (unsigned long) pid;
}
static int lookup_client(
struct rtkit_user **_u,
struct process **_p,
struct thread **_t,
DBusConnection *c,
DBusMessage *m,
pid_t pid,
pid_t tid) {
DBusError error;
int r;
unsigned long uid;
unsigned long long starttime;
struct rtkit_user *u;
struct process *p;
struct thread *t;
dbus_error_init(&error);
/* Determine caller credentials */
if ((uid = dbus_bus_get_unix_user(c, dbus_message_get_sender(m), &error)) == (unsigned long) -1) {
syslog(LOG_ERR, "dbus_message_get_unix_user() failed: %s\n", error.message);
r = -EIO;
goto fail;
}
if (pid == (pid_t) -1 &&
(pid = get_unix_process_id(c, dbus_message_get_sender(m), &error)) == (pid_t) -1) {
syslog(LOG_ERR, "get_unix_process_id() failed: %s\n", error.message);
r = -EIO;
goto fail;
}
/* Find or create user structure */
if ((r = find_user(&u, (uid_t) uid) < 0))
goto fail;
/* Find or create process structure */
if ((r = read_starttime((pid_t) pid, 0, &starttime)) < 0)
goto fail;
if ((r = find_process(&p, u, (pid_t) pid, starttime)) < 0)
goto fail;
/* Find or create thread structure */
if (tid == 0)
tid = p->pid;
if ((r = read_starttime(p->pid, tid, &starttime)) < 0)
goto fail;
if ((r = find_thread(&t, u, p, (pid_t) tid, starttime)) < 0)
goto fail;
*_u = u;
*_p = p;
*_t = t;
return 0;
fail:
dbus_error_free(&error);
return r;
}
static const char *translate_error_forward(int error) {
switch (error) {
case -EPERM:
case -EACCES:
case -EBUSY:
return DBUS_ERROR_ACCESS_DENIED;
case -ENOMEM:
return DBUS_ERROR_NO_MEMORY;
default:
return DBUS_ERROR_FAILED;
}
}
static int translate_error_backwards(const char *name) {
if (strcmp(name, DBUS_ERROR_NO_MEMORY) == 0)
return -ENOMEM;
if (strcmp(name, DBUS_ERROR_SERVICE_UNKNOWN) == 0 ||
strcmp(name, DBUS_ERROR_NAME_HAS_NO_OWNER) == 0)
return -ENOENT;
if (strcmp(name, DBUS_ERROR_ACCESS_DENIED) == 0 ||
strcmp(name, DBUS_ERROR_AUTH_FAILED) == 0)
return -EACCES;
return -EIO;
}
static int verify_polkit(DBusConnection *c, struct rtkit_user *u, struct process *p, const char *action) {
DBusError error;
DBusMessage *m = NULL, *r = NULL;
const char *unix_process = "unix-process";
const char *pid = "pid";
const char *uid = "uid";
const char *start_time = "start-time";
const char *cancel_id = "";
uint32_t flags = 0;
uint32_t pid_u32 = p->pid;
uint32_t uid_u32 = (uint32_t)u->uid;
DBusMessageIter iter_msg, iter_struct, iter_array, iter_dict, iter_variant;
uint64_t start_time_u64 = p->starttime;
int ret;
dbus_bool_t authorized = FALSE;
dbus_error_init(&error);
assert_se(m = dbus_message_new_method_call(
"org.freedesktop.PolicyKit1",
"/org/freedesktop/PolicyKit1/Authority",
"org.freedesktop.PolicyKit1.Authority",
"CheckAuthorization"));
dbus_message_iter_init_append(m, &iter_msg);
assert_se(dbus_message_iter_open_container(&iter_msg, DBUS_TYPE_STRUCT, NULL, &iter_struct));
assert_se(dbus_message_iter_append_basic(&iter_struct, DBUS_TYPE_STRING, &unix_process));
assert_se(dbus_message_iter_open_container(&iter_struct, DBUS_TYPE_ARRAY, "{sv}", &iter_array));
assert_se(dbus_message_iter_open_container(&iter_array, DBUS_TYPE_DICT_ENTRY, NULL, &iter_dict));
assert_se(dbus_message_iter_append_basic(&iter_dict, DBUS_TYPE_STRING, &pid));
assert_se(dbus_message_iter_open_container(&iter_dict, DBUS_TYPE_VARIANT, "u", &iter_variant));
assert_se(dbus_message_iter_append_basic(&iter_variant, DBUS_TYPE_UINT32, &pid_u32));
assert_se(dbus_message_iter_close_container(&iter_dict, &iter_variant));
assert_se(dbus_message_iter_close_container(&iter_array, &iter_dict));
assert_se(dbus_message_iter_open_container(&iter_array, DBUS_TYPE_DICT_ENTRY, NULL, &iter_dict));
assert_se(dbus_message_iter_append_basic(&iter_dict, DBUS_TYPE_STRING, &start_time));
assert_se(dbus_message_iter_open_container(&iter_dict, DBUS_TYPE_VARIANT, "t", &iter_variant));
assert_se(dbus_message_iter_append_basic(&iter_variant, DBUS_TYPE_UINT64, &start_time_u64));
assert_se(dbus_message_iter_close_container(&iter_dict, &iter_variant));
assert_se(dbus_message_iter_close_container(&iter_array, &iter_dict));
assert_se(dbus_message_iter_open_container(&iter_array, DBUS_TYPE_DICT_ENTRY, NULL, &iter_dict));
assert_se(dbus_message_iter_append_basic(&iter_dict, DBUS_TYPE_STRING, &uid));
assert_se(dbus_message_iter_open_container(&iter_dict, DBUS_TYPE_VARIANT, "u", &iter_variant));
assert_se(dbus_message_iter_append_basic(&iter_variant, DBUS_TYPE_UINT32, &uid_u32));
assert_se(dbus_message_iter_close_container(&iter_dict, &iter_variant));
assert_se(dbus_message_iter_close_container(&iter_array, &iter_dict));
assert_se(dbus_message_iter_close_container(&iter_struct, &iter_array));
assert_se(dbus_message_iter_close_container(&iter_msg, &iter_struct));
assert_se(dbus_message_iter_append_basic(&iter_msg, DBUS_TYPE_STRING, &action));
assert_se(dbus_message_iter_open_container(&iter_msg, DBUS_TYPE_ARRAY, "{ss}", &iter_array));
assert_se(dbus_message_iter_close_container(&iter_msg, &iter_array));
assert_se(dbus_message_iter_append_basic(&iter_msg, DBUS_TYPE_UINT32, &flags));
assert_se(dbus_message_iter_append_basic(&iter_msg, DBUS_TYPE_STRING, &cancel_id));
if (!(r = dbus_connection_send_with_reply_and_block(c, m, -1, &error))) {
ret = translate_error_backwards(error.name);
goto finish;
}
if (dbus_set_error_from_message(&error, r)) {
ret = translate_error_backwards(error.name);
goto finish;
}
if (!dbus_message_iter_init(r, &iter_msg) ||
dbus_message_iter_get_arg_type(&iter_msg) != DBUS_TYPE_STRUCT) {
ret = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter_msg, &iter_struct);
if (dbus_message_iter_get_arg_type(&iter_struct) != DBUS_TYPE_BOOLEAN) {
ret = -EIO;
goto finish;
}
dbus_message_iter_get_basic(&iter_struct, &authorized);
ret = authorized ? 0 : -EPERM;
finish:
if (m)
dbus_message_unref(m);
if (r)
dbus_message_unref(r);
if (error.message)
syslog(LOG_WARNING, "Warning: PolicyKit call failed: %s\n", error.message);
dbus_error_free(&error);
return ret;
}
static int verify_canary_refusal(void) {
struct timespec now;
assert_se(clock_gettime(CLOCK_MONOTONIC, &now) == 0);
if (now.tv_sec < (time_t) refuse_until) {
syslog(LOG_WARNING, "Recovering from system lockup, not allowing further RT threads.\n");
return -EPERM;
}
return 0;
}
static void add_variant(
DBusMessage *m,
int type,
const void *data) {
DBusMessageIter iter, sub;
char t[2];
t[0] = (char) type;
t[1] = 0;
dbus_message_iter_init_append(m, &iter);
assert_se(dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, t, &sub));
assert_se(dbus_message_iter_append_basic(&sub, type, data));
assert_se(dbus_message_iter_close_container(&iter, &sub));
}
static int handle_dbus_prop_get(const char* property, DBusMessage *r) {
if (strcmp(property, "RTTimeUSecMax") == 0)
add_variant(r, DBUS_TYPE_INT64, &rttime_usec_max);
else if (strcmp(property, "MaxRealtimePriority") == 0)
add_variant(r, DBUS_TYPE_INT32, &max_realtime_priority);
else if (strcmp(property, "MinNiceLevel") == 0)
add_variant(r, DBUS_TYPE_INT32, &min_nice_level);
else
return -1;
return 0;
}
static int handle_dbus_prop_get_all(DBusMessage *r) {
DBusMessageIter iter, dict_iter;
struct {
const char *name;
int type;
const char *type_string;
void *value;
} props[] = {
{
.name = "RTTimeUSecMax",
.type = DBUS_TYPE_INT64,
.type_string = DBUS_TYPE_INT64_AS_STRING,
.value = &rttime_usec_max,
},
{
.name = "MaxRealtimePriority",
.type = DBUS_TYPE_INT32,
.type_string = DBUS_TYPE_INT32_AS_STRING,
.value = &max_realtime_priority,
},
{
.name = "MinNiceLevel",
.type = DBUS_TYPE_INT32,
.type_string = DBUS_TYPE_INT32_AS_STRING,
.value = &min_nice_level,
}
};
size_t i;
dbus_message_iter_init_append(r, &iter);
assert_se(dbus_message_iter_open_container(&iter,
DBUS_TYPE_ARRAY,
DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
DBUS_TYPE_STRING_AS_STRING
DBUS_TYPE_VARIANT_AS_STRING
DBUS_DICT_ENTRY_END_CHAR_AS_STRING,
&dict_iter));
for (i = 0; i < ARRAY_SIZE(props); i++) {
DBusMessageIter dict_entry_iter, sub;
assert_se(dbus_message_iter_open_container(&dict_iter,
DBUS_TYPE_DICT_ENTRY, NULL,
&dict_entry_iter));
assert_se(dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING,
&props[i].name));
assert_se(dbus_message_iter_open_container(&dict_entry_iter,
DBUS_TYPE_VARIANT,
props[i].type_string,
&sub));
assert_se(dbus_message_iter_append_basic(&sub, props[i].type, props[i].value));
assert_se(dbus_message_iter_close_container(&dict_entry_iter, &sub));
assert_se(dbus_message_iter_close_container(&dict_iter, &dict_entry_iter));
}
assert_se(dbus_message_iter_close_container(&iter, &dict_iter));
return 0;
}
static DBusHandlerResult dbus_handler(DBusConnection *c, DBusMessage *m, void *userdata) {
DBusError error;
DBusMessage *r = NULL;
int is2 = 0;
dbus_error_init(&error);
/* We garbage collect on every user call */
user_gc(FALSE);
if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "MakeThreadRealtime") ||
(is2 = dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "MakeThreadRealtimeWithPID"))) {
uint64_t thread, process = (uint64_t) -1;
uint32_t priority;
struct rtkit_user *u;
struct process *p;
struct thread *t;
int ret;
if ((ret = verify_canary_refusal()) < 0) {
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
if (is2)
ret = dbus_message_get_args(m, &error,
DBUS_TYPE_UINT64, &process,
DBUS_TYPE_UINT64, &thread,
DBUS_TYPE_UINT32, &priority,
DBUS_TYPE_INVALID);
else
ret = dbus_message_get_args(m, &error,
DBUS_TYPE_UINT64, &thread,
DBUS_TYPE_UINT32, &priority,
DBUS_TYPE_INVALID);
if (!ret) {
syslog(LOG_DEBUG, "Failed to parse MakeThreadRealtime() method call: %s\n", error.message);
assert_se(r = dbus_message_new_error(m, error.name, error.message));
goto finish;
}
if ((ret = lookup_client(&u, &p, &t, c, m, (pid_t)process, (pid_t) thread)) < 0) {
syslog(LOG_DEBUG, "Failed to look up client: %s\n", strerror(-ret));
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
if ((ret = verify_polkit(c, u, p, "org.freedesktop.RealtimeKit1.acquire-real-time")) < 0) {
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
if ((ret = process_set_realtime_request(u, p, t, priority))) {
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
assert_se(r = dbus_message_new_method_return(m));
} else if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "MakeThreadHighPriority")
|| (is2 = dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "MakeThreadHighPriorityWithPID"))) {
uint64_t thread, process = (uint64_t) -1;
int32_t nice_level;
struct rtkit_user *u;
struct process *p;
struct thread *t;
int ret;
if ((ret = verify_canary_refusal()) < 0) {
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
if (is2)
ret = dbus_message_get_args(m, &error,
DBUS_TYPE_UINT64, &process,
DBUS_TYPE_UINT64, &thread,
DBUS_TYPE_INT32, &nice_level,
DBUS_TYPE_INVALID);
else
ret = dbus_message_get_args(m, &error,
DBUS_TYPE_UINT64, &thread,
DBUS_TYPE_INT32, &nice_level,
DBUS_TYPE_INVALID);
if (!ret) {
syslog(LOG_DEBUG, "Failed to parse MakeThreadHighPriority() method call: %s\n", error.message);
assert_se(r = dbus_message_new_error(m, error.name, error.message));
goto finish;
}
if ((ret = lookup_client(&u, &p, &t, c, m, (pid_t)process, (pid_t) thread)) < 0) {
syslog(LOG_DEBUG, "Failed to look up client: %s\n", strerror(-ret));
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
if ((ret = verify_polkit(c, u, p, "org.freedesktop.RealtimeKit1.acquire-high-priority")) < 0) {
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
if ((ret = process_set_high_priority_request(u, p, t, nice_level))) {
assert_se(r = dbus_message_new_error_printf(m, translate_error_forward(ret), "%s", strerror(-ret)));
goto finish;
}
assert_se(r = dbus_message_new_method_return(m));
} else if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "ResetAll")) {
reset_all();
user_gc(TRUE);
assert_se(r = dbus_message_new_method_return(m));
} else if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "ResetKnown")) {
reset_known();
user_gc(TRUE);
assert_se(r = dbus_message_new_method_return(m));
} else if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "Suspend")) {
suspend();
assert_se(r = dbus_message_new_method_return(m));
} else if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "Resume")) {
resume();
assert_se(r = dbus_message_new_method_return(m));
} else if (dbus_message_is_method_call(m, "org.freedesktop.RealtimeKit1", "Exit")) {
assert_se(r = dbus_message_new_method_return(m));
assert_se(dbus_connection_send(c, r, NULL));
dbus_message_unref(r);
r = NULL;
dbus_connection_close(c);
} else if (dbus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get")) {
const char *interface, *property;
if (!dbus_message_get_args(m, &error,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &property,
DBUS_TYPE_INVALID)) {
syslog(LOG_DEBUG, "Failed to parse property get call: %s\n", error.message);
assert_se(r = dbus_message_new_error(m, error.name, error.message));
goto finish;
}
if (strcmp(interface, "org.freedesktop.RealtimeKit1") == 0) {
assert_se(r = dbus_message_new_method_return(m));
if (handle_dbus_prop_get(property, r) < 0) {
dbus_message_unref(r);
assert_se(r = dbus_message_new_error_printf(
m,
DBUS_ERROR_UNKNOWN_PROPERTY,
"Unknown property %s",
property));
}
} else
assert_se(r = dbus_message_new_error_printf(
m,
DBUS_ERROR_UNKNOWN_PROPERTY,
"Unknown interface %s",
interface));
goto finish;
} else if (dbus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "GetAll")) {
const char *interface;
if (!dbus_message_get_args(m, &error,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_INVALID)) {
syslog(LOG_DEBUG, "Failed to parse property get call: %s\n", error.message);
assert_se(r = dbus_message_new_error(m, error.name, error.message));
goto finish;
}
if (strcmp(interface, "org.freedesktop.RealtimeKit1") == 0) {
assert_se(r = dbus_message_new_method_return(m));
handle_dbus_prop_get_all(r);
} else
assert_se(r = dbus_message_new_error_printf(
m,
DBUS_ERROR_UNKNOWN_PROPERTY,
"Unknown interface %s",
interface));
} else if (dbus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
const char *xml = introspect_xml;
assert_se(r = dbus_message_new_method_return(m));
assert_se(dbus_message_append_args(
r,
DBUS_TYPE_STRING, &xml,
DBUS_TYPE_INVALID));
goto finish;
} else
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
syslog(LOG_DEBUG, "Supervising %u threads of %u processes of %u users.\n",
n_total_threads,
n_total_processes,
n_users);
#ifdef HAVE_LIBSYSTEMD
sd_notifyf(0,
"STATUS=Supervising %u threads of %u processes of %u users.",
n_total_threads,
n_total_processes,
n_users);
#endif
finish:
if (r) {
assert_se(dbus_connection_send(c, r, NULL));
dbus_message_unref(r);
}
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_HANDLED;
}
static DBusHandlerResult dbus_logind_handler(DBusConnection *c, DBusMessage *m, void *userdata) {
if (dbus_message_is_signal(m, "org.freedesktop.login1.Manager", "PrepareForSleep")) {
DBusError error;
bool active;
dbus_error_init(&error);
if (dbus_message_get_args(m, &error, DBUS_TYPE_BOOLEAN, &active, DBUS_TYPE_INVALID)) {
if (active) {
suspend();
if (inhibit_sleep_fd >= 0) {
close(inhibit_sleep_fd);
inhibit_sleep_fd = -1;
}
} else {
if (inhibit_sleep_fd < 0)
inhibit_sleep_fd = logind_inhibit_sleep(c);
resume();
}
} else
syslog(LOG_DEBUG, "Failed to parse signal argument: %s\n", error.message);
dbus_error_free(&error);
} else
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
return DBUS_HANDLER_RESULT_HANDLED;
}
static void setup_logind(DBusConnection *c) {
DBusError error;
inhibit_sleep_fd = logind_inhibit_sleep(c);
if (inhibit_sleep_fd < 0)
return;
dbus_error_init(&error);
dbus_bus_add_match(c, "type='signal',path='/org/freedesktop/login1',member='PrepareForSleep'", &error);
if (dbus_error_is_set(&error)) {
syslog(LOG_ERR, "Failed to add match for logind signals: %s\n", error.message);
close(inhibit_sleep_fd);
inhibit_sleep_fd = -1;
dbus_error_free(&error);
return;
}
assert_se(dbus_connection_add_filter(c, dbus_logind_handler, NULL, NULL));
syslog(LOG_INFO, "Handling system-suspend using logind.\n");
}
static int setup_dbus(DBusConnection **c) {
static const DBusObjectPathVTable vtable = {
.message_function = dbus_handler,
};
DBusError error;
dbus_error_init(&error);
if (!(*c = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
syslog(LOG_ERR, "Failed to connect to system bus: %s\n", error.message);
goto fail;
}
if (dbus_bus_request_name(*c, RTKIT_SERVICE_NAME, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) < 0) {
syslog(LOG_ERR, "Failed to register name on bus: %s\n", error.message);
goto fail;
}
assert_se(dbus_connection_register_object_path(*c, RTKIT_OBJECT_PATH, &vtable, NULL));
return 0;
fail:
dbus_error_free(&error);
return -EIO;
}
static void block_all_signals(void) {
sigset_t set;
assert_se(sigfillset(&set) == 0);
assert_se(pthread_sigmask(SIG_BLOCK, &set, NULL) == 0);
}
static void* canary_thread(void *data) {
struct timespec last_cheep, now;
struct pollfd pollfd;
assert(canary_fd >= 0);
assert(quit_fd >= 0);
/* Make sure we are not disturbed by any signal */
block_all_signals();
self_drop_realtime(0);
memset(&pollfd, 0, sizeof(pollfd));
pollfd.fd = quit_fd;
pollfd.events = POLLIN;
assert_se(clock_gettime(CLOCK_MONOTONIC, &now) == 0);
last_cheep = now;
syslog(LOG_DEBUG, "Canary thread running.\n");
for (;;) {
int r;
int64_t msec;
msec = TIMESPEC_MSEC(last_cheep) + canary_cheep_msec - TIMESPEC_MSEC(now);
if (msec < 0)
msec = 0;
r = poll(&pollfd, 1, (int) msec);
assert_se(clock_gettime(CLOCK_MONOTONIC, &now) == 0);
if (r < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
syslog(LOG_ERR, "poll() failed: %s\n", strerror(errno));
break;
}
if (pollfd.revents) {
syslog(LOG_DEBUG, "Exiting canary thread.\n");
break;
}
if (TIMESPEC_MSEC(last_cheep) + canary_cheep_msec <= TIMESPEC_MSEC(now)) {
eventfd_t value = 1;
if (eventfd_write(canary_fd, value) < 0) {
syslog(LOG_ERR, "eventfd_write() failed: %s\n", strerror(errno));
break;
}
last_cheep = now;
continue;
}
}
return NULL;
}
static void* watchdog_thread(void *data) {
enum {
POLLFD_CANARY,
POLLFD_QUIT,
_POLLFD_MAX
};
struct timespec last_cheep, now;
struct pollfd pollfd[_POLLFD_MAX];
assert(canary_fd >= 0);
assert(quit_fd >= 0);
/* Make sure we are not disturbed by any signal */
block_all_signals();
self_set_realtime(canary_watchdog_realtime_priority);
memset(pollfd, 0, sizeof(pollfd));
pollfd[POLLFD_CANARY].fd = canary_fd;
pollfd[POLLFD_CANARY].events = POLLIN;
pollfd[POLLFD_QUIT].fd = quit_fd;
pollfd[POLLFD_QUIT].events = POLLIN;
assert_se(clock_gettime(CLOCK_MONOTONIC, &now) == 0);
last_cheep = now;
syslog(LOG_DEBUG, "Watchdog thread running.\n");
for (;;) {
int r;
int64_t msec;
msec = TIMESPEC_MSEC(last_cheep) + canary_watchdog_msec - TIMESPEC_MSEC(now);
if (msec < 0)
msec = 0;
r = poll(pollfd, _POLLFD_MAX, (int) msec);
assert_se(clock_gettime(CLOCK_MONOTONIC, &now) == 0);
if (r < 0) {
if (errno == EINTR || errno == EAGAIN)
continue;
syslog(LOG_ERR, "poll() failed: %s\n", strerror(errno));
break;
}
if (pollfd[POLLFD_QUIT].revents) {
syslog(LOG_DEBUG, "Exiting watchdog thread.\n");
break;
}
if (pollfd[POLLFD_CANARY].revents) {
eventfd_t value;
if (eventfd_read(canary_fd, &value) < 0) {
syslog(LOG_ERR, "eventfd_read() failed: %s\n", strerror(errno));
break;
}
last_cheep = now;
continue;
}
if (TIMESPEC_MSEC(last_cheep) + canary_watchdog_msec <= TIMESPEC_MSEC(now)) {
last_cheep = now;
syslog(LOG_WARNING, "The canary thread is apparently starving. Taking action.\n");
refuse_until = (uint32_t) now.tv_sec + canary_refusal_sec;
__sync_synchronize();
if (canary_demote_unknown)
reset_all();
else
reset_known();
continue;
}
}
return NULL;
}
static void stop_canary(void) {
int r;
if (quit_fd >= 0) {
eventfd_t value = 1;
if (eventfd_write(quit_fd, value) < 0)
syslog(LOG_WARNING, "Warning: eventfd_write() failed: %s\n", strerror(errno));
}
if (canary_thread_id != 0) {
if ((r = pthread_join(canary_thread_id, NULL)) != 0)
syslog(LOG_WARNING, "Warning: pthread_join() failed: %s\n", strerror(r));
canary_thread_id = 0;
}
if (watchdog_thread_id != 0) {
if ((r = pthread_join(watchdog_thread_id, NULL)) != 0)
syslog(LOG_WARNING, "Warning: pthread_join() failed: %s\n", strerror(r));
watchdog_thread_id = 0;
}
if (canary_fd >= 0) {
close(canary_fd);
canary_fd = -1;
}
if (quit_fd >= 0) {
close(quit_fd);
quit_fd = -1;
}
}
static int start_canary(void) {
int r;
if (!do_canary)
return 0;
if ((canary_fd = eventfd(0, EFD_NONBLOCK|EFD_CLOEXEC)) < 0 ||
(quit_fd = eventfd(0, EFD_NONBLOCK|EFD_CLOEXEC)) < 0) {
r = -errno;
syslog(LOG_ERR, "eventfd() failed: %s\n", strerror(errno));
goto fail;
}
if ((r = -pthread_create(&canary_thread_id, NULL, canary_thread, NULL)) < 0 ||
(r = -pthread_create(&watchdog_thread_id, NULL, watchdog_thread, NULL)) < 0) {
syslog(LOG_ERR, "pthread_create failed: %s\n", strerror(-r));
goto fail;
}
return 0;
fail:
stop_canary();
return r;
}
static int drop_privileges(void) {
struct passwd *pw = NULL;
int r;
if (do_drop_privileges) {
/* First, get user data */
if (!(pw = getpwnam(username))) {
syslog(LOG_ERR, "Failed to find user '%s'.\n", username);
return -ENOENT;
}
}
if (do_chroot) {
/* Second, chroot() */
if (chroot("/proc") < 0 ||
chdir("/") < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to chroot() to /proc: %s\n", strerror(errno));
return r;
}
proc = "/";
syslog(LOG_DEBUG, "Successfully called chroot.\n");
}
if (do_drop_privileges) {
static const cap_value_t cap_values[] = {
CAP_SYS_NICE, /* Needed for obvious reasons */
CAP_DAC_READ_SEARCH /* Needed so that we can verify resource limits */
};
cap_value_t c, m;
cap_t caps;
m = CAP_LAST_CAP;
/* In case the number of caps in the kernel is increased, drop them too */
if (m < 63)
m = 63;
/* Third, reduce bounding set */
for (c = 0; c <= m; c++) {
unsigned u;
bool keep = false;
for (u = 0; u < ELEMENTSOF(cap_values); u++)
if (cap_values[u] == c) {
keep = true;
break;
}
if (!keep)
assert_se(prctl(PR_CAPBSET_DROP, c) == 0 || errno == EINVAL || errno == EPERM);
}
/* Fourth, say that we want to keep caps */
if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
r = -errno;
syslog(LOG_ERR, "PR_SET_KEEPCAPS failed: %s\n", strerror(errno));
return r;
}
/* Fifth, drop privs */
if (setgroups(0, NULL) < 0 ||
setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) < 0 ||
setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to become %s: %s\n", username, strerror(errno));
return r;
}
/* Sixth, reset caps flag */
if (prctl(PR_SET_KEEPCAPS, 0) < 0) {
r = -errno;
syslog(LOG_ERR, "PR_SET_KEEPCAPS failed: %s\n", strerror(errno));
return r;
}
/* Seventh, reduce caps */
assert_se(caps = cap_init());
assert_se(cap_clear(caps) == 0);
assert_se(cap_set_flag(caps, CAP_EFFECTIVE, ELEMENTSOF(cap_values), cap_values, CAP_SET) == 0);
assert_se(cap_set_flag(caps, CAP_PERMITTED, ELEMENTSOF(cap_values), cap_values, CAP_SET) == 0);
if (cap_set_proc(caps) < 0) {
r = -errno;
syslog(LOG_ERR, "cap_set_proc() failed: %s\n", strerror(errno));
return r;
}
assert_se(cap_free(caps) == 0);
/* Eigth, update environment */
setenv("USER", username, 1);
setenv("USERNAME", username, 1);
setenv("LOGNAME", username, 1);
setenv("HOME", get_proc_path(), 1);
syslog(LOG_DEBUG, "Successfully dropped privileges.\n");
}
return 0;
}
static int set_resource_limits(void) {
static struct {
int id;
const char *name;
rlim_t value;
} table[] = {
{ .id = RLIMIT_FSIZE, .name = "RLIMIT_FSIZE", .value = 0 },
{ .id = RLIMIT_MEMLOCK, .name = "RLIMIT_MEMLOCK", .value = 0 },
{ .id = RLIMIT_MSGQUEUE, .name = "RLIMIT_MSGQUEUE", .value = 0 },
{ .id = RLIMIT_NICE, .name = "RLIMIT_NICE", .value = 20 },
{ .id = RLIMIT_NOFILE, .name = "RLIMIT_NOFILE", .value = 50 },
{ .id = RLIMIT_NPROC, .name = "RLIMIT_NPROC", .value = 3 },
{ .id = RLIMIT_RTPRIO, .name = "RLIMIT_RTPRIO", .value = 0 }, /* Since we have CAP_SYS_NICE we don't need this */
{ .id = RLIMIT_RTTIME, .name = "RLIMIT_RTTIME", .value = 0 }
};
unsigned u;
int r;
assert(table[7].id == RLIMIT_RTTIME);
table[7].value = rttime_usec_max; /* Do as I say AND do as I do */
if (!do_limit_resources)
return 0;
for (u = 0; u < ELEMENTSOF(table); u++) {
struct rlimit rlim;
if (getrlimit(table[u].id, &rlim) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to get %s: %s\n", table[u].name, strerror(errno));
return r;
}
if (rlim.rlim_max < table[u].value)
continue;
rlim.rlim_cur = rlim.rlim_max = table[u].value;
if (setrlimit(table[u].id, &rlim) < 0) {
r = -errno;
syslog(LOG_ERR, "Failed to set %s: %s\n", table[u].name, strerror(errno));
return r;
}
}
syslog(LOG_DEBUG, "Successfully limited resources.\n");
return 0;
}
enum {
ARG_HELP = 256,
ARG_VERSION,
ARG_SCHEDULING_POLICY,
ARG_OUR_REALTIME_PRIORITY,
ARG_OUR_NICE_LEVEL,
ARG_MAX_REALTIME_PRIORITY,
ARG_MIN_NICE_LEVEL,
ARG_USER_NAME,
ARG_RTTIME_USEC_MAX,
ARG_USERS_MAX,
ARG_PROCESSES_PER_USER_MAX,
ARG_THREADS_PER_USER_MAX,
ARG_ACTIONS_BURST_SEC,
ARG_ACTIONS_PER_BURST_MAX,
ARG_NO_DROP_PRIVILEGES,
ARG_NO_CHROOT,
ARG_NO_LIMIT_RESOURCES,
ARG_NO_CANARY,
ARG_CANARY_CHEEP_MSEC,
ARG_CANARY_WATCHDOG_MSEC,
ARG_CANARY_DEMOTE_ROOT,
ARG_CANARY_DEMOTE_UNKNOWN,
ARG_CANARY_REFUSE_SEC,
ARG_STDERR,
ARG_DEBUG,
ARG_INTROSPECT
};
/* Table for getopt_long() */
static const struct option long_options[] = {
{ "help", no_argument, 0, ARG_HELP },
{ "version", no_argument, 0, ARG_VERSION },
{ "scheduling-policy", required_argument, 0, ARG_SCHEDULING_POLICY },
{ "our-realtime-priority", required_argument, 0, ARG_OUR_REALTIME_PRIORITY },
{ "our-nice-level", required_argument, 0, ARG_OUR_NICE_LEVEL },
{ "max-realtime-priority", required_argument, 0, ARG_MAX_REALTIME_PRIORITY },
{ "min-nice-level", required_argument, 0, ARG_MIN_NICE_LEVEL },
{ "user-name", required_argument, 0, ARG_USER_NAME },
{ "rttime-usec-max", required_argument, 0, ARG_RTTIME_USEC_MAX },
{ "users-max", required_argument, 0, ARG_USERS_MAX },
{ "processes-per-user-max", required_argument, 0, ARG_PROCESSES_PER_USER_MAX },
{ "threads-per-user-max", required_argument, 0, ARG_THREADS_PER_USER_MAX },
{ "actions-burst-sec", required_argument, 0, ARG_ACTIONS_BURST_SEC },
{ "actions-per-burst-max", required_argument, 0, ARG_ACTIONS_PER_BURST_MAX },
{ "no-drop-privileges", no_argument, 0, ARG_NO_DROP_PRIVILEGES },
{ "no-chroot", no_argument, 0, ARG_NO_CHROOT },
{ "no-limit-resources", no_argument, 0, ARG_NO_LIMIT_RESOURCES },
{ "no-canary", no_argument, 0, ARG_NO_CANARY },
{ "canary-cheep-msec", required_argument, 0, ARG_CANARY_CHEEP_MSEC },
{ "canary-watchdog-msec", required_argument, 0, ARG_CANARY_WATCHDOG_MSEC },
{ "canary-demote-root", no_argument, 0, ARG_CANARY_DEMOTE_ROOT },
{ "canary-demote-unknown", no_argument, 0, ARG_CANARY_DEMOTE_UNKNOWN },
{ "canary-refuse-sec", required_argument, 0, ARG_CANARY_REFUSE_SEC },
{ "stderr", no_argument, 0, ARG_STDERR },
{ "debug", no_argument, 0, ARG_DEBUG },
{ "introspect", no_argument, 0, ARG_INTROSPECT },
{ NULL, 0, 0, 0}
};
static char* get_file_name(const char *p) {
char *e;
if ((e = strrchr(p, '/')))
return e + 1;
else
return (char*) p;
}
static void show_help(const char *exe) {
static const char * const sp_names[] = {
[SCHED_OTHER] = "OTHER",
[SCHED_BATCH] = "BATCH",
[SCHED_FIFO] = "FIFO",
[SCHED_RR] = "RR"
};
printf("%s [options]\n\n"
"COMMANDS:\n"
" -h, --help Show this help\n"
" --version Show version\n\n"
"OPTIONS:\n"
" --stderr Log to STDERR in addition to syslog\n"
" --debug Also log debugging mssages\n"
" --user-name=USER Run daemon as user (%s)\n\n"
" --scheduling-policy=(RR|FIFO) Choose scheduling policy (%s)\n"
" --our-realtime-priority=[%i..%i] Realtime priority for the daemon (%u)\n"
" --our-nice-level=[%i..%i] Nice level for the daemon (%i)\n"
" --max-realtime-priority=[%i..%i] Max realtime priority for clients (%u)\n"
" --min-nice-level=[%i..%i] Min nice level for clients (%i)\n\n"
" --rttime-usec-max=USEC Require clients to have set RLIMIT_RTTIME\n"
" not greater than this (%llu)\n\n"
" --users-max=INT How many users this daemon will serve at\n"
" max at the same time (%u)\n"
" --processes-per-user-max=INT How many processes this daemon will serve\n"
" at max per user at the same time (%u)\n"
" --threads-per-user-max=INT How many threads this daemon will serve\n"
" at max per user at the same time (%u)\n\n"
" --actions-burst-sec=SEC Enforce requests limits in this time (%u)\n"
" --actions-per-burst-max=INT Allow this many requests per burst (%u)\n\n"
" --canary-cheep-msec=MSEC Canary cheep interval (%u)\n"
" --canary-watchdog-msec=MSEC Watchdog action delay (%u)\n"
" --canary-demote-unknown When the canary dies demote unknown\n"
" processes too?\n"
" --canary-demote-root When the canary dies demote root\n"
" processes too?\n"
" --canary-refuse-sec=SEC How long to refuse further requests\n"
" after the canary died (%u)\n\n"
" --no-canary Don't run a canary-based RT watchdog\n\n"
" --no-drop-privileges Don't drop privileges\n"
" --no-chroot Don't chroot\n"
" --no-limit-resources Don't limit daemon's resources\n",
exe,
username,
sp_names[sched_policy],
sched_get_priority_min(sched_policy), sched_get_priority_max(sched_policy), our_realtime_priority,
PRIO_MIN, PRIO_MAX-1, our_nice_level,
sched_get_priority_min(sched_policy), sched_get_priority_max(sched_policy), max_realtime_priority,
PRIO_MIN, PRIO_MAX-1, min_nice_level,
rttime_usec_max,
users_max,
processes_per_user_max,
threads_per_user_max,
actions_burst_sec,
actions_per_burst_max,
canary_cheep_msec,
canary_watchdog_msec,
canary_refusal_sec);
}
static int parse_command_line(int argc, char *argv[], int *ret) {
int c;
while ((c = getopt_long(argc, argv, "h", long_options, NULL)) >= 0) {
switch (c) {
case 'h':
case ARG_HELP:
show_help(get_file_name(argv[0]));
*ret = 0;
return 0;
case ARG_VERSION:
printf("%s " PACKAGE_VERSION "\n", get_file_name(argv[0]));
*ret = 0;
return 0;
case ARG_USER_NAME:
username = optarg;
break;
case ARG_SCHEDULING_POLICY: {
if (strcasecmp(optarg, "rr") == 0)
sched_policy = SCHED_RR;
else if (strcasecmp(optarg, "fifo") == 0)
sched_policy = SCHED_FIFO;
else {
fprintf(stderr, "--scheduling-policy parameter invalid.\n");
return -1;
}
break;
}
case ARG_OUR_REALTIME_PRIORITY: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u < (unsigned) sched_get_priority_min(sched_policy) || u > (unsigned) sched_get_priority_max(sched_policy)) {
fprintf(stderr, "--our-realtime-priority parameter invalid.\n");
return -1;
}
our_realtime_priority = u;
break;
}
case ARG_OUR_NICE_LEVEL: {
char *e = NULL;
long i;
errno = 0;
i = strtol(optarg, &e, 0);
if (errno != 0 || !e || *e || i < PRIO_MIN || i > PRIO_MAX*2) {
fprintf(stderr, "--our-nice-level parameter invalid.\n");
return -1;
}
our_nice_level = i;
break;
}
case ARG_MAX_REALTIME_PRIORITY: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u < (unsigned) sched_get_priority_min(sched_policy) || u > (unsigned) sched_get_priority_max(sched_policy)) {
fprintf(stderr, "--max-realtime-priority parameter invalid.\n");
return -1;
}
max_realtime_priority = u;
break;
}
case ARG_MIN_NICE_LEVEL: {
char *e = NULL;
long i;
errno = 0;
i = strtol(optarg, &e, 0);
if (errno != 0 || !e || *e || i < PRIO_MIN || i >= PRIO_MAX) {
fprintf(stderr, "--min-nice-level parameter invalid.\n");
return -1;
}
min_nice_level = i;
break;
}
case ARG_RTTIME_USEC_MAX: {
char *e = NULL;
errno = 0;
rttime_usec_max = strtoull(optarg, &e, 0);
if (errno != 0 || !e || *e || rttime_usec_max <= 0) {
fprintf(stderr, "--rttime-usec-max parameter invalid.\n");
return -1;
}
break;
}
case ARG_USERS_MAX: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--users-max parameter invalid.\n");
return -1;
}
users_max = u;
break;
}
case ARG_PROCESSES_PER_USER_MAX: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--processes-per-user-max parameter invalid.\n");
return -1;
}
processes_per_user_max = u;
break;
}
case ARG_THREADS_PER_USER_MAX: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--threads-per-user-max parameter invalid.\n");
return -1;
}
threads_per_user_max = u;
break;
}
case ARG_ACTIONS_BURST_SEC: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--actions-burst-sec parameter invalid.\n");
return -1;
}
actions_burst_sec = u;
break;
}
case ARG_ACTIONS_PER_BURST_MAX: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--actions-per-burst-max parameter invalid.\n");
return -1;
}
actions_per_burst_max = u;
break;
}
case ARG_NO_DROP_PRIVILEGES:
do_drop_privileges = FALSE;
break;
case ARG_NO_CHROOT:
do_chroot = FALSE;
break;
case ARG_NO_LIMIT_RESOURCES:
do_limit_resources = FALSE;
break;
case ARG_NO_CANARY:
do_canary = FALSE;
break;
case ARG_CANARY_WATCHDOG_MSEC: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--canary-watchdog-msec parameter invalid.\n");
return -1;
}
canary_watchdog_msec = u;
break;
}
case ARG_CANARY_CHEEP_MSEC: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e || u <= 0) {
fprintf(stderr, "--canary-cheep-msec parameter invalid.\n");
return -1;
}
canary_cheep_msec = u;
break;
}
case ARG_CANARY_DEMOTE_ROOT:
canary_demote_root = TRUE;
break;
case ARG_CANARY_DEMOTE_UNKNOWN:
canary_demote_unknown = TRUE;
break;
case ARG_CANARY_REFUSE_SEC: {
char *e = NULL;
unsigned long u;
errno = 0;
u = strtoul(optarg, &e, 0);
if (errno != 0 || !e || *e) {
fprintf(stderr, "--canary-refuse-sec parameter invalid.\n");
return -1;
}
canary_refusal_sec = (uint32_t) u;
break;
}
case ARG_STDERR:
log_stderr = TRUE;
break;
case ARG_DEBUG:
log_debug = TRUE;
break;
case ARG_INTROSPECT:
fputs(introspect_xml, stdout);
*ret = 0;
return 0;
case '?':
default:
fprintf(stderr, "Unknown command.\n");
return -1;
}
}
if (optind < argc) {
fprintf(stderr, "Too many arguments.\n");
return -1;
}
if (max_realtime_priority >= our_realtime_priority) {
fprintf(stderr, "The maximum realtime priority (%u) handed out to clients cannot be higher then our own (%u).\n",
max_realtime_priority,
our_realtime_priority);
return -1;
}
if (canary_cheep_msec >= canary_watchdog_msec) {
fprintf(stderr, "The canary watchdog interval must be larger than the cheep interval.\n");
return -1;
}
if (!log_debug)
setlogmask(LOG_UPTO(LOG_INFO));
assert(our_realtime_priority >= (unsigned) sched_get_priority_min(sched_policy));
assert(our_realtime_priority <= (unsigned) sched_get_priority_max(sched_policy));
assert(max_realtime_priority >= (unsigned) sched_get_priority_min(sched_policy));
assert(max_realtime_priority <= (unsigned) sched_get_priority_max(sched_policy));
assert(canary_watchdog_realtime_priority >= (unsigned) sched_get_priority_min(sched_policy));
assert(canary_watchdog_realtime_priority <= (unsigned) sched_get_priority_max(sched_policy));
assert(our_nice_level >= PRIO_MIN);
assert(our_nice_level < PRIO_MAX);
assert(min_nice_level >= PRIO_MIN);
assert(min_nice_level < PRIO_MAX);
return 1;
}
int main(int argc, char *argv[]) {
DBusConnection *bus = NULL;
int ret = 1;
struct rtkit_user *u;
unsigned long slack_ns;
if (parse_command_line(argc, argv, &ret) <= 0)
goto finish;
if (getuid() != 0) {
fprintf(stderr, "Need to be run as root.\n");
goto finish;
}
openlog(get_file_name(argv[0]),
LOG_NDELAY|LOG_PID|(log_stderr ? LOG_PERROR : 0),
LOG_DAEMON);
/* Raise our timer slack, we don't really need to be woken up
* on time. */
slack_ns = (((unsigned long) canary_watchdog_msec - (unsigned long) canary_cheep_msec) / 2UL) * 1000000UL;
if (prctl(PR_SET_TIMERSLACK, slack_ns) < 0)
syslog(LOG_WARNING, "PRT_SET_TIMERSLACK failed: %s\n", strerror(errno));
self_drop_realtime(our_nice_level);
if (setup_dbus(&bus) < 0)
goto finish;
if (drop_privileges() < 0)
goto finish;
if (set_resource_limits() < 0)
goto finish;
if (start_canary() < 0)
goto finish;
setup_logind(bus);
umask(0777);
syslog(LOG_DEBUG, "Running.\n");
#ifdef HAVE_LIBSYSTEMD
sd_notify(0, "STATUS=Running.");
#endif
dbus_connection_set_exit_on_disconnect(bus, FALSE);
while (dbus_connection_read_write_dispatch(bus, -1))
;
ret = 0;
syslog(LOG_DEBUG, "Exiting cleanly.\n");
finish:
if (bus) {
if (dbus_connection_get_is_connected(bus))
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
reset_known();
while ((u = users)) {
users = u->next;
free_user(u);
}
stop_canary();
dbus_shutdown();
return ret;
}
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkit-daemon.service.in 0000664 0000000 0000000 00000002000 15116374247 0024610 0 ustar 00root root 0000000 0000000 # This file is part of RealtimeKit.
#
# Copyright 2010 Lennart Poettering
#
# RealtimeKit is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# RealtimeKit is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with RealtimeKit. If not, see .
[Unit]
Description=RealtimeKit Scheduling Policy Service
[Service]
ExecStart=@LIBEXECDIR@/rtkit-daemon
Type=dbus
BusName=org.freedesktop.RealtimeKit1
NotifyAccess=main
CapabilityBoundingSet=CAP_SYS_NICE CAP_DAC_READ_SEARCH CAP_SYS_CHROOT CAP_SETGID CAP_SETUID
PrivateNetwork=yes
[Install]
WantedBy=multi-user.target
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkit-test.c 0000664 0000000 0000000 00000010463 15116374247 0022515 0 ustar 00root root 0000000 0000000 /*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of RealtimeKit.
Copyright 2009 Lennart Poettering
RealtimeKit is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
RealtimeKit is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with RealtimeKit. If not, see .
***/
#include
#include
#include
#include
#include
#include
#include "rtkit.h"
#ifndef SCHED_RESET_ON_FORK
#define SCHED_RESET_ON_FORK 0x40000000
#endif
#ifndef RLIMIT_RTTIME
#define RLIMIT_RTTIME 15
#endif
static void print_status(const char *t) {
int ret;
if ((ret = sched_getscheduler(0)) < 0) {
fprintf(stderr, "sched_getscheduler() failed: %s\n", strerror(errno));
return;
}
printf("%s:\n"
"\tSCHED_RESET_ON_FORK: %s\n",
t,
(ret & SCHED_RESET_ON_FORK) ? "yes" : "no");
if ((ret & ~SCHED_RESET_ON_FORK) == SCHED_RR) {
struct sched_param param;
if (sched_getparam(0, ¶m) < 0) {
fprintf(stderr, "sched_getschedparam() failed: %s\n", strerror(errno));
return;
}
printf("\tSCHED_RR with priority %i\n", param.sched_priority);
} else if ((ret & ~SCHED_RESET_ON_FORK) == SCHED_OTHER) {
errno = 0;
ret = getpriority(PRIO_PROCESS, 0);
if (errno != 0) {
fprintf(stderr, "getpriority() failed: %s\n", strerror(errno));
return;
}
printf("\tSCHED_OTHER with nice level: %i\n", ret);
} else
fprintf(stderr, "Neither SCHED_RR nor SCHED_OTHER.\n");
}
int main(int argc, char *argv[]) {
DBusError error;
DBusConnection *bus;
int r, max_realtime_priority, min_nice_level;
long long rttime_usec_max;
struct rlimit rlim;
dbus_error_init(&error);
if (!(bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error))) {
fprintf(stderr, "Failed to connect to system bus: %s\n", error.message);
return 1;
}
if ((max_realtime_priority = rtkit_get_max_realtime_priority(bus)) < 0)
fprintf(stderr, "Failed to retrieve max realtime priority: %s\n", strerror(-max_realtime_priority));
else
printf("Max realtime priority is: %d\n", max_realtime_priority);
if ((r = rtkit_get_min_nice_level(bus, &min_nice_level)))
fprintf(stderr, "Failed to retrieve min nice level: %s\n", strerror(-r));
else
printf("Min nice level is: %d\n", min_nice_level);
if ((rttime_usec_max = rtkit_get_rttime_usec_max(bus)) < 0)
fprintf(stderr, "Failed to retrieve rttime limit: %s\n", strerror(-rttime_usec_max));
else
printf("Rttime limit is: %lld ns\n", rttime_usec_max);
memset(&rlim, 0, sizeof(rlim));
rlim.rlim_cur = rlim.rlim_max = 100000ULL; /* 100ms */
if ((setrlimit(RLIMIT_RTTIME, &rlim) < 0))
fprintf(stderr, "Failed to set RLIMIT_RTTIME: %s\n", strerror(errno));
print_status("before");
if ((r = rtkit_make_high_priority(bus, 0, -10)) < 0)
fprintf(stderr, "Failed to become high priority: %s\n", strerror(-r));
else
printf("Successfully became high priority.\n");
print_status("after high priority");
if ((r = rtkit_make_realtime(bus, 0, 10)) < 0)
fprintf(stderr, "Failed to become realtime: %s\n", strerror(-r));
else
printf("Successfully became realtime.\n");
print_status("after realtime");
dbus_connection_unref(bus);
return 0;
}
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkit.c 0000664 0000000 0000000 00000024250 15116374247 0021537 0 ustar 00root root 0000000 0000000 /*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
Copyright 2009 Lennart Poettering
Copyright 2010 David Henningsson
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
***/
#include
#include "rtkit.h"
#ifdef __linux__
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include
#include
#include
#include
#include
static pid_t _gettid(void) {
return (pid_t) syscall(SYS_gettid);
}
static int translate_error(const char *name) {
if (strcmp(name, DBUS_ERROR_NO_MEMORY) == 0)
return -ENOMEM;
if (strcmp(name, DBUS_ERROR_SERVICE_UNKNOWN) == 0 ||
strcmp(name, DBUS_ERROR_NAME_HAS_NO_OWNER) == 0)
return -ENOENT;
if (strcmp(name, DBUS_ERROR_ACCESS_DENIED) == 0 ||
strcmp(name, DBUS_ERROR_AUTH_FAILED) == 0)
return -EACCES;
return -EIO;
}
static long long rtkit_get_int_property(DBusConnection *connection, const char* propname, long long* propval) {
DBusMessage *m = NULL, *r = NULL;
DBusMessageIter iter, subiter;
dbus_int64_t i64;
dbus_int32_t i32;
DBusError error;
int current_type;
long long ret;
const char * interfacestr = "org.freedesktop.RealtimeKit1";
dbus_error_init(&error);
if (!(m = dbus_message_new_method_call(
RTKIT_SERVICE_NAME,
RTKIT_OBJECT_PATH,
"org.freedesktop.DBus.Properties",
"Get"))) {
ret = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(
m,
DBUS_TYPE_STRING, &interfacestr,
DBUS_TYPE_STRING, &propname,
DBUS_TYPE_INVALID)) {
ret = -ENOMEM;
goto finish;
}
if (!(r = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
ret = translate_error(error.name);
goto finish;
}
if (dbus_set_error_from_message(&error, r)) {
ret = translate_error(error.name);
goto finish;
}
ret = -EBADMSG;
dbus_message_iter_init(r, &iter);
while ((current_type = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID) {
if (current_type == DBUS_TYPE_VARIANT) {
dbus_message_iter_recurse(&iter, &subiter);
while ((current_type = dbus_message_iter_get_arg_type (&subiter)) != DBUS_TYPE_INVALID) {
if (current_type == DBUS_TYPE_INT32) {
dbus_message_iter_get_basic(&subiter, &i32);
*propval = i32;
ret = 0;
}
if (current_type == DBUS_TYPE_INT64) {
dbus_message_iter_get_basic(&subiter, &i64);
*propval = i64;
ret = 0;
}
dbus_message_iter_next (&subiter);
}
}
dbus_message_iter_next (&iter);
}
finish:
if (m)
dbus_message_unref(m);
if (r)
dbus_message_unref(r);
dbus_error_free(&error);
return ret;
}
int rtkit_get_max_realtime_priority(DBusConnection *connection) {
long long retval;
int err;
err = rtkit_get_int_property(connection, "MaxRealtimePriority", &retval);
return err < 0 ? err : retval;
}
int rtkit_get_min_nice_level(DBusConnection *connection, int* min_nice_level) {
long long retval;
int err;
err = rtkit_get_int_property(connection, "MinNiceLevel", &retval);
if (err >= 0)
*min_nice_level = retval;
return err;
}
long long rtkit_get_rttime_usec_max(DBusConnection *connection) {
long long retval;
int err;
err = rtkit_get_int_property(connection, "RTTimeUSecMax", &retval);
return err < 0 ? err : retval;
}
int rtkit_make_realtime(DBusConnection *connection, pid_t thread, int priority) {
DBusMessage *m = NULL, *r = NULL;
dbus_uint64_t u64;
dbus_uint32_t u32;
DBusError error;
int ret;
dbus_error_init(&error);
if (thread == 0)
thread = _gettid();
if (!(m = dbus_message_new_method_call(
RTKIT_SERVICE_NAME,
RTKIT_OBJECT_PATH,
"org.freedesktop.RealtimeKit1",
"MakeThreadRealtime"))) {
ret = -ENOMEM;
goto finish;
}
u64 = (dbus_uint64_t) thread;
u32 = (dbus_uint32_t) priority;
if (!dbus_message_append_args(
m,
DBUS_TYPE_UINT64, &u64,
DBUS_TYPE_UINT32, &u32,
DBUS_TYPE_INVALID)) {
ret = -ENOMEM;
goto finish;
}
if (!(r = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
ret = translate_error(error.name);
goto finish;
}
if (dbus_set_error_from_message(&error, r)) {
ret = translate_error(error.name);
goto finish;
}
ret = 0;
finish:
if (m)
dbus_message_unref(m);
if (r)
dbus_message_unref(r);
dbus_error_free(&error);
return ret;
}
int rtkit_make_high_priority(DBusConnection *connection, pid_t thread, int nice_level) {
DBusMessage *m = NULL, *r = NULL;
dbus_uint64_t u64;
dbus_int32_t s32;
DBusError error;
int ret;
dbus_error_init(&error);
if (thread == 0)
thread = _gettid();
if (!(m = dbus_message_new_method_call(
RTKIT_SERVICE_NAME,
RTKIT_OBJECT_PATH,
"org.freedesktop.RealtimeKit1",
"MakeThreadHighPriority"))) {
ret = -ENOMEM;
goto finish;
}
u64 = (dbus_uint64_t) thread;
s32 = (dbus_int32_t) nice_level;
if (!dbus_message_append_args(
m,
DBUS_TYPE_UINT64, &u64,
DBUS_TYPE_INT32, &s32,
DBUS_TYPE_INVALID)) {
ret = -ENOMEM;
goto finish;
}
if (!(r = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
ret = translate_error(error.name);
goto finish;
}
if (dbus_set_error_from_message(&error, r)) {
ret = translate_error(error.name);
goto finish;
}
ret = 0;
finish:
if (m)
dbus_message_unref(m);
if (r)
dbus_message_unref(r);
dbus_error_free(&error);
return ret;
}
int rtkit_make_realtime_simple(void)
{
DBusConnection *dc;
long long rtt;
int ret;
struct rlimit old_rlim;
struct rlimit rlim;
int prio;
dc = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
if (dc == NULL)
return -ENETUNREACH;
rtt = rtkit_get_rttime_usec_max(dc);
if (rtt < 0) {
ret = rtt;
goto finish;
}
ret = getrlimit(RLIMIT_RTTIME, &old_rlim);
if (ret < 0) {
ret = -errno;
goto finish;
}
rlim.rlim_cur = rtt;
rlim.rlim_max = rtt;
ret = setrlimit(RLIMIT_RTTIME, &rlim);
if (ret < 0) {
ret = -errno;
goto finish;
}
prio = rtkit_get_max_realtime_priority(dc);
if (prio < 0) {
ret = prio;
setrlimit(RLIMIT_RTTIME, &old_rlim);
goto finish;
}
ret = rtkit_make_realtime(dc, 0, prio);
if (ret < 0)
setrlimit(RLIMIT_RTTIME, &old_rlim);
finish:
dbus_connection_unref(dc);
return ret;
}
#else
int rtkit_make_realtime(DBusConnection *connection, pid_t thread, int priority) {
return -ENOTSUP;
}
int rtkit_make_high_priority(DBusConnection *connection, pid_t thread, int nice_level) {
return -ENOTSUP;
}
int rtkit_get_max_realtime_priority(DBusConnection *connection) {
return -ENOTSUP;
}
int rtkit_get_min_nice_level(DBusConnection *connection, int* min_nice_level) {
return -ENOTSUP;
}
long long rtkit_get_rttime_usec_max(DBusConnection *connection) {
return -ENOTSUP;
}
int rtkit_make_realtime_simple()
{
return -ENOTSUP;
}
#endif
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkit.h 0000664 0000000 0000000 00000006564 15116374247 0021554 0 ustar 00root root 0000000 0000000 /*-*- Mode: C; c-basic-offset: 8 -*-*/
#ifndef foortkithfoo
#define foortkithfoo
/***
Copyright 2009 Lennart Poettering
Copyright 2010 David Henningsson
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
***/
#include
#include
#ifdef __cplusplus
extern "C" {
#endif
/* This is the reference implementation for a client for
* RealtimeKit. You don't have to use this, but if do, just copy these
* sources into your repository */
#define RTKIT_SERVICE_NAME "org.freedesktop.RealtimeKit1"
#define RTKIT_OBJECT_PATH "/org/freedesktop/RealtimeKit1"
/* This is mostly equivalent to sched_setparam(thread, SCHED_RR, {
* .sched_priority = priority }). 'thread' needs to be a kernel thread
* id as returned by gettid(), not a pthread_t! If 'thread' is 0 the
* current thread is used. The returned value is a negative errno
* style error code, or 0 on success. */
int rtkit_make_realtime(DBusConnection *system_bus, pid_t thread, int priority);
/* This is mostly equivalent to setpriority(PRIO_PROCESS, thread,
* nice_level). 'thread' needs to be a kernel thread id as returned by
* gettid(), not a pthread_t! If 'thread' is 0 the current thread is
* used. The returned value is a negative errno style error code, or 0
* on success.*/
int rtkit_make_high_priority(DBusConnection *system_bus, pid_t thread, int nice_level);
/* Return the maximum value of realtime priority available. Realtime requests
* above this value will fail. A negative value is an errno style error code.
*/
int rtkit_get_max_realtime_priority(DBusConnection *system_bus);
/* Retreive the minimum value of nice level available. High prio requests
* below this value will fail. The returned value is a negative errno
* style error code, or 0 on success.*/
int rtkit_get_min_nice_level(DBusConnection *system_bus, int* min_nice_level);
/* Return the maximum value of RLIMIT_RTTIME to set before attempting a
* realtime request. A negative value is an errno style error code.
*/
long long rtkit_get_rttime_usec_max(DBusConnection *system_bus);
/* Make the current thread realtime in one function call.
* Returns 0 on success and -errno on failure.
* A failure to connect to dbus counts as -ENETUNREACH.
*/
int rtkit_make_realtime_simple(void);
#ifdef __cplusplus
}
#endif
#endif
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkit.sysusers 0000664 0000000 0000000 00000000156 15116374247 0023214 0 ustar 00root root 0000000 0000000 #Type Name ID GECOS Home directory Shell
u rtkit - "RealtimeKit" - -
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkitctl.8 0000664 0000000 0000000 00000003214 15116374247 0022164 0 ustar 00root root 0000000 0000000 .\" Hey, EMACS: -*- nroff -*-
.\" First parameter, NAME, should be all caps
.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
.\" other parameters are allowed: see man(7), man(1)
.TH RTKITCTL 8 "October 16, 2023"
.\" Please adjust this date whenever revising the manpage.
.\"
.\" Some roff macros, for reference:
.\" .nh disable hyphenation
.\" .hy enable hyphenation
.\" .ad l left justify
.\" .ad b justify to both left and right margins
.\" .nf disable filling
.\" .fi enable filling
.\" .br insert line break
.\" .sp insert n+1 empty lines
.\" for manpage-specific macros, see man(7)
.SH NAME
rtkitctl \- Realtime Policy and Watchdog daemon control
.SH SYNOPSIS
.B rtkitctl
.RI [ options ]
.SH DESCRIPTION
.B RealtimeKit
is a D-Bus system service that changes the scheduling policy of user processes/threads to SCHED_RR (i.e. realtime scheduling mode) on request. It is intended to be used as a secure mechanism to allow real-time scheduling to be used by normal user processes.
.SH OPTIONS
.TP
.B \-h, \-\-help
Show a summary of options.
.TP
.B \-\-version
Show version.
.TP
.B \-\-reset\-known
Reset real-time status of known threads.
.TP
.B \-\-reset\-all
Reset real-time status of all threads.
.TP
.B \-\-suspend
Temporarily reset real-time status of known threads.
.TP
.B \-\-resume
Restore real-time status of known threads temporarily reset by suspend.
.TP
.B \-\-start
Start RealtimeKit if it is not running already.
.TP
.B \-k, \-\-exit
Terminate running RealtimeKit daemon.
.SH AUTHOR
RealtimeKit was written by Lennart Poettering .
rtkit-v0.14-c52db0a9849908613ab8775b519834671b7bec8b/rtkitctl.c 0000664 0000000 0000000 00000017202 15116374247 0022241 0 ustar 00root root 0000000 0000000 /*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of RealtimeKit.
Copyright 2009 Lennart Poettering
RealtimeKit is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
RealtimeKit is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with RealtimeKit. If not, see .
***/
#ifdef HAVE_CONFIG_H
#include
#endif
#include
#include
#include
#include "rtkit.h"
static char* get_file_name(const char *p) {
char *e;
if ((e = strrchr(p, '/')))
return e + 1;
else
return (char*) p;
}
static void show_help(const char *exe) {
printf("%s [options]\n\n"
" -h, --help Show this help\n"
" --version Show version\n\n"
" --reset-known Reset real-time status of known threads\n"
" --reset-all Reset real-time status of all threads\n"
" --start Start RealtimeKit if it is not running already\n"
" -k, --exit Terminate running RealtimeKit daemon\n"
" --suspend Suspend real-time status of known threads and reject new requests\n"
" --resume Resume real-time status of known threads and allow new requests\n",
exe);
}
int main (int argc, char*argv[]) {
enum {
ARG_HELP = 256,
ARG_VERSION,
ARG_START,
ARG_EXIT,
ARG_RESET_KNOWN,
ARG_RESET_ALL,
ARG_SUSPEND,
ARG_RESUME,
};
static const struct option long_options[] = {
{ "help", no_argument, 0, ARG_HELP },
{ "version", no_argument, 0, ARG_VERSION },
{ "start", no_argument, 0, ARG_START },
{ "exit", no_argument, 0, ARG_EXIT },
{ "reset-known", no_argument, 0, ARG_RESET_KNOWN },
{ "reset-all", no_argument, 0, ARG_RESET_ALL },
{ "suspend", no_argument, 0, ARG_SUSPEND },
{ "resume", no_argument, 0, ARG_RESUME },
{ NULL, 0, 0, 0}
};
enum {
OPERATION_START,
OPERATION_EXIT,
OPERATION_RESET_KNOWN,
OPERATION_RESET_ALL,
OPERATION_SUSPEND,
OPERATION_RESUME,
_OPERATION_MAX
};
static const char *method[_OPERATION_MAX] = {
[OPERATION_START] = "StartServiceByName",
[OPERATION_EXIT] = "Exit",
[OPERATION_RESET_KNOWN] = "ResetKnown",
[OPERATION_RESET_ALL] = "ResetAll",
[OPERATION_SUSPEND] = "Suspend",
[OPERATION_RESUME] = "Resume"
};
DBusError error;
DBusConnection *bus = NULL;
int operation = -1;
int ret = 1;
DBusMessage *m = NULL, *r = NULL;
int c;
dbus_error_init(&error);
while ((c = getopt_long(argc, argv, "hk", long_options, NULL)) >= 0) {
switch (c) {
case 'h':
case ARG_HELP:
show_help(get_file_name(argv[0]));
ret = 0;
goto finish;
case ARG_VERSION:
printf("%s " PACKAGE_VERSION "\n", get_file_name(argv[0]));
ret = 0;
goto finish;
case ARG_START:
operation = OPERATION_START;
break;
case 'k':
case ARG_EXIT:
operation = OPERATION_EXIT;
break;
case ARG_RESET_KNOWN:
operation = OPERATION_RESET_KNOWN;
break;
case ARG_RESET_ALL:
operation = OPERATION_RESET_ALL;
break;
case ARG_SUSPEND:
operation = OPERATION_SUSPEND;
break;
case ARG_RESUME:
operation = OPERATION_RESUME;
break;
case '?':
default:
fprintf(stderr, "Unknown command.\n");
goto finish;
}
}
if (optind < argc) {
fprintf(stderr, "Too many arguments.\n");
goto finish;
}
if (operation < 0) {
fprintf(stderr, "Need to specify operation.\n");
goto finish;
}
if (!(bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error))) {
fprintf(stderr, "Failed to connect to system bus: %s\n", error.message);
goto finish;
}
if (operation == OPERATION_START) {
const char *service = RTKIT_SERVICE_NAME;
dbus_uint32_t flags = 0;
if (!(m = dbus_message_new_method_call(
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
method[operation]))) {
fprintf(stderr, "Failed to allocated message.\n");
goto finish;
}
if (!(dbus_message_append_args(
m,
DBUS_TYPE_STRING, &service,
DBUS_TYPE_UINT32, &flags,
DBUS_TYPE_INVALID))) {
fprintf(stderr, "Failed to append to message.\n");
goto finish;
}
} else {
if (!(m = dbus_message_new_method_call(
RTKIT_SERVICE_NAME,
RTKIT_OBJECT_PATH,
"org.freedesktop.RealtimeKit1",
method[operation]))) {
fprintf(stderr, "Failed to allocated message.\n");
goto finish;
}
}
if (!(r = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
fprintf(stderr, "Failed to send %s request: %s\n", method[operation], error.message);
goto finish;
}
if (dbus_set_error_from_message(&error, r)) {
fprintf(stderr, "%s request failed: %s\n", method[operation], error.message);
goto finish;
}
ret = 0;
finish:
if (m)
dbus_message_unref(m);
if (r)
dbus_message_unref(r);
if (bus)
dbus_connection_unref(bus);
return ret;
}