file-tail-1.0.12/ 0000755 0000041 0000041 00000000000 12055510146 013470 5 ustar www-data www-data file-tail-1.0.12/.travis.yml 0000644 0000041 0000041 00000000250 12055510146 015576 0 ustar www-data www-data rvm:
- 1.8.7
- 1.9.2
- 1.9.3
- ruby-head
- ree
- rbx-18mode
- rbx-19mode
- jruby-18mode
- jruby-19mode
matrix:
allow_failures:
- rvm: ruby-head
file-tail-1.0.12/examples/ 0000755 0000041 0000041 00000000000 12055510146 015306 5 ustar www-data www-data file-tail-1.0.12/examples/pager.rb 0000755 0000041 0000041 00000000643 12055510146 016737 0 ustar www-data www-data #!/usr/bin/env ruby
# A poor man's pager... :)
require 'file/tail'
filename = ARGV.shift or fail "Usage: #$0 filename [height]"
height = (ARGV.shift || ENV['LINES'] || 23).to_i - 1
File::Tail::Logfile.open(filename, :break_if_eof => true) do |log|
begin
log.tail(height) { |line| puts line }
print "Press return key to continue!" ; gets
print " "
redo
rescue File::Tail::BreakException
end
end
file-tail-1.0.12/examples/tail.rb 0000755 0000041 0000041 00000000347 12055510146 016573 0 ustar www-data www-data #!/usr/bin/env ruby
require 'file/tail'
filename = ARGV.pop or fail "Usage: #$0 number filename"
number = (ARGV.pop || 0).to_i.abs
File::Tail::Logfile.open(filename) do |log|
log.backward(number).tail { |line| puts line }
end
file-tail-1.0.12/tests/ 0000755 0000041 0000041 00000000000 12055510146 014632 5 ustar www-data www-data file-tail-1.0.12/tests/test_helper.rb 0000644 0000041 0000041 00000000250 12055510146 017472 0 ustar www-data www-data if ENV['START_SIMPLECOV'].to_i == 1
require 'simplecov'
SimpleCov.start do
add_filter "#{File.basename(File.dirname(__FILE__))}/"
end
end
require 'test/unit'
file-tail-1.0.12/tests/file_tail_test.rb 0000644 0000041 0000041 00000020070 12055510146 020145 0 ustar www-data www-data #!/usr/bin/env ruby
require 'test_helper'
require 'file/tail'
require 'timeout'
require 'thread'
Thread.abort_on_exception = true
class FileTailTest < Test::Unit::TestCase
include File::Tail
def setup
@out = File.new("test.#$$", "wb")
append(@out, 100)
@in = File.new(@out.path, "rb")
@in.extend(File::Tail)
@in.interval = 0.4
@in.max_interval = 0.8
@in.reopen_deleted = true # is default
@in.reopen_suspicious = true # is default
@in.suspicious_interval = 60
end
def test_forward
[ 0, 1, 2, 10, 100 ].each do |lines|
@in.forward(lines)
assert_equal(100 - lines, count(@in))
end
@in.forward(101)
assert_equal(0, count(@in))
end
def test_backward
[ 0, 1, 2, 10, 100 ].each do |lines|
@in.backward(lines)
assert_equal(lines, count(@in))
end
@in.backward(101)
assert_equal(100, count(@in))
end
def test_backward_small_buffer
[ 0, 1, 2, 10, 100 ].each do |lines|
@in.backward(lines, 100)
assert_equal(lines, count(@in))
end
@in.backward(101, 100)
assert_equal(100, count(@in))
end
def test_backward_small_buffer2
@in.default_bufsize = 100
[ 0, 1, 2, 10, 100 ].each do |lines|
@in.backward(lines)
assert_equal(lines, count(@in))
end
@in.backward(101)
assert_equal(100, count(@in))
end
def test_tail_with_block_without_n
timeout(10) do
lines = []
@in.backward(1)
assert_raises(TimeoutError) do
timeout(1) { @in.tail { |l| lines << l } }
end
assert_equal(1, lines.size)
#
lines = []
@in.backward(10)
assert_raises(TimeoutError) do
timeout(1) { @in.tail { |l| lines << l } }
end
assert_equal(10, lines.size)
#
lines = []
@in.backward(100)
assert_raises(TimeoutError) do
timeout(1) { @in.tail { |l| lines << l } }
end
assert_equal(100, lines.size)
#
lines = []
@in.backward(101)
assert_raises(TimeoutError) do
timeout(1) { @in.tail { |l| lines << l } }
end
end
end
def test_tail_with_block_with_n
timeout(10) do
@in.backward(1)
lines = []
timeout(1) { @in.tail(0) { |l| lines << l } }
assert_equal(0, lines.size)
#
@in.backward(1)
lines = []
timeout(1) { @in.tail(1) { |l| lines << l } }
assert_equal(1, lines.size)
#
@in.backward(10)
lines = []
timeout(1) { @in.tail(10) { |l| lines << l } }
assert_equal(10, lines.size)
#
@in.backward(100)
lines = []
@in.backward(1)
assert_raises(TimeoutError) do
timeout(1) { @in.tail(2) { |l| lines << l } }
end
assert_equal(1, lines.size)
#
end
end
def test_tail_without_block_with_n
timeout(10) do
@in.backward(1)
lines = []
timeout(1) { lines += @in.tail(0) }
assert_equal(0, lines.size)
#
@in.backward(1)
lines = []
timeout(1) { lines += @in.tail(1) }
assert_equal(1, lines.size)
#
@in.backward(10)
lines = []
timeout(1) { lines += @in.tail(10) }
assert_equal(10, lines.size)
#
@in.backward(100)
lines = []
@in.backward(1)
assert_raises(TimeoutError) do
timeout(1) { lines += @in.tail(2) }
end
assert_equal(0, lines.size)
end
end
def test_tail_withappend
@in.backward
lines = []
logger = Thread.new do
begin
timeout(1) { @in.tail { |l| lines << l } }
rescue TimeoutError
end
end
appender = Thread.new { append(@out, 10) }
appender.join
logger.join
assert_equal(10, lines.size)
end
def test_tail_truncated
@in.backward
lines = []
logger = Thread.new do
begin
timeout(10) do
@in.tail do |l|
lines << l
end
end
rescue TimeoutError
end
end
appender = Thread.new do
until logger.stop?
sleep 0.1
end
@out.close
File.truncate(@out.path, 0)
@out = File.new(@in.path, "ab")
append(@out, 10)
end
appender.join
logger.join
assert_equal(10, lines.size)
end
def test_tail_remove
return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
@in.backward
reopened = false
@in.after_reopen { |f| reopened = true }
lines = []
logger = Thread.new do
begin
timeout(2) do
@in.tail do |l|
lines << l
end
end
rescue TimeoutError
end
end
appender = Thread.new do
until logger.stop?
sleep 0.1
end
@out.close
File.unlink(@out.path)
@out = File.new(@in.path, "wb")
append(@out, 10)
end
appender.join
logger.join
assert_equal(10, lines.size)
assert reopened
end
def test_tail_remove2
return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
@in.backward
reopened = false
@in.after_reopen { |f| reopened = true }
lines = []
logger = Thread.new do
begin
timeout(2) do
@in.tail do |l|
lines << l
end
end
rescue TimeoutError
end
end
appender = Thread.new do
until logger.stop?
sleep 0.1
end
@out.close
File.unlink(@out.path)
@out = File.new(@in.path, "wb")
append(@out, 10)
sleep 1
append(@out, 10)
File.unlink(@out.path)
@out = File.new(@in.path, "wb")
append(@out, 10)
end
appender.join
logger.join
assert_equal(30, lines.size)
assert reopened
end
def test_tail_remove3
return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
@in.backward
reopened = false
@in.after_reopen { |f| reopened = true }
lines = []
logger = Thread.new do
begin
timeout(2) do
@in.tail(15) do |l|
lines << l
end
end
rescue TimeoutError
end
end
appender = Thread.new do
until logger.stop?
sleep 0.1
end
@out.close
File.unlink(@out.path)
@out = File.new(@in.path, "wb")
append(@out, 10)
sleep 1
append(@out, 10)
File.unlink(@out.path)
@out = File.new(@in.path, "wb")
append(@out, 10)
end
appender.join
logger.join
assert_equal(15, lines.size)
assert reopened
end
def test_tail_change
return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
@in.forward
reopened = false
assert_equal 0, @in.lineno
@in.after_reopen { |f| reopened = true }
lines = []
logger = Thread.new do
begin
timeout(2) do
@in.tail(110) do |l|
lines << l
end
end
rescue TimeoutError
end
end
appender = Thread.new do
until logger.stop?
sleep 0.1
end
@out.close
File.unlink(@out.path)
@out = File.new(@in.path, "wb")
append(@out, 10)
end
appender.join
logger.join
assert_equal(110, lines.size)
assert reopened
assert_equal 10, @in.lineno
end
def test_tail_change2
return if File::PATH_SEPARATOR == ';' # Grmpf! Windows...
@in.forward
reopened = false
assert_equal 0, @in.lineno
@in.after_reopen { |f| reopened = true }
lines = []
logger = Thread.new do
begin
timeout(2) do
@in.tail(110) do |l|
lines << l
end
end
rescue TimeoutError
end
end
appender = Thread.new do
until logger.stop?
sleep 0.1
end
@out.truncate 0
@out.close
@out = File.new(@in.path, "wb")
append(@out, 10)
end
appender.join
logger.join
assert_equal(110, lines.size)
assert reopened
assert_equal 10, @in.lineno
end
def teardown
@in.close
@out.close
File.unlink(@out.path)
end
private
def count(file)
n = 0
until file.eof?
file.readline
n += 1
end
return n
end
def append(file, n, size = 70)
(1..n).each { |x| file << "#{x} #{"A" * size}\n" }
file.flush
end
end
file-tail-1.0.12/tests/file_tail_group_test.rb 0000644 0000041 0000041 00000003565 12055510146 021373 0 ustar www-data www-data #!/usr/bin/env ruby
require 'test_helper'
require 'file/tail'
require 'timeout'
require 'thread'
require 'tempfile'
Thread.abort_on_exception = true
class FileTailGroupTest < Test::Unit::TestCase
include File::Tail
def test_create_group
t, = make_file
g = Group[t]
assert_equal t.path, g.each_tailer.first.file.path
assert_equal t.path, g.each_file.first.path
end
def test_stop_group
t, = make_file
g = Group[t]
assert_equal t.path, g.each_tailer.first.file.path
assert_equal t.path, g.each_file.first.path
g.stop
assert_nil g.each_file.first
end
def test_add_file_to_group
g = Group.new
t, = make_file
g.add_file t
assert_equal t.path, g.each_tailer.first.file.path
assert_equal t.path, g.each_file.first.path
end
def test_add_filename_to_group
g = Group.new
t, name = make_file
t.close
g.add_filename name
assert_equal name, g.each_tailer.first.file.path
assert_equal t.path, g.each_file.first.path
end
def test_add_generic_to_group
g = Group.new
t1, n1 = make_file
t1.close
t2, n1 = make_file
g << n1
g << t2
assert g.each_tailer.any? { |t| t.file.path == n1 }
assert g.each_tailer.any? { |t| t.file.path == t2.path }
assert g.each_file.any? { |t| t.path == n1 }
assert g.each_file.any? { |t| t.path == t2.path }
end
def test_tail_multiple_files
t1, = make_file
t1.max_interval = 0.1
t2, = make_file
t2.max_interval = 0.1
g = Group[t1, t2]
q = Queue.new
t = Thread.new do
g.tail { |l| q << l }
end
t1.puts "foo"
assert_equal "foo\n", q.pop
t2.puts "bar"
assert_equal "bar\n", q.pop
ensure
t and t.exit
end
private
def make_file
name = File.expand_path(File.join(Dir.tmpdir, "tmp.#$$"))
file = File.open(name, 'w+')
file.extend File::Tail
return file, name
end
end
file-tail-1.0.12/README.rdoc 0000644 0000041 0000041 00000003570 12055510146 015303 0 ustar www-data www-data = File::Tail for Ruby
== Description
This is a small ruby library that allows it to "tail" files in Ruby, including
following a file, that still is growing like the unix command 'tail -f' can.
== Download
The latest version of File::Tail (file-tail) can be found at
http://www.ping.de/~flori
Online Documentation should be located at
http://flori.github.com/file-tail
== Installation
To install file-tail via its gem type:
# gem install file-tail
To install from the source repository, just type into the command line as root:
# rake install
== Usage
File::Tail is a module in the File class. A lightweight class interface for
logfiles can be seen under File::Tail::Logfile.
Direct extension of File objects with File::Tail works like that:
File.open(filename) do |log|
log.extend(File::Tail)
log.interval = 10
log.backward(10)
log.tail { |line| puts line }
end
It's also possible to mix File::Tail in your own File classes
(see also File::Tail::Logfile):
class MyFile < File
include File::Tail
end
log = MyFile.new("myfile")
log.interval = 10
log.backward(10)
log.tail { |line| print line }
The forward/backward method returns self, so it's possible to chain
methods together like that:
log.backward(10).tail { |line| puts line }
A command line utility named rtail, that uses File::Tail is provided as well.
== Documentation
To create the documentation of this module, type
$ rake doc
and the API documentation is generated.
In the examples direcotry is a small example of tail and
pager program that use this module. You also may want look
at the end of file/tail.rb for a little example.
== Author
Florian Frank mailto:flori@ping.de
== License
This is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License Version 2 as published by
the Free Software Foundation: http://www.gnu.org/copyleft/gpl.html
file-tail-1.0.12/Rakefile 0000644 0000041 0000041 00000001772 12055510146 015144 0 ustar www-data www-data # vim: set filetype=ruby et sw=2 ts=2:
require 'gem_hadar'
GemHadar do
name 'file-tail'
path_name 'file/tail'
author 'Florian Frank'
email 'flori@ping.de'
homepage "http://github.com/flori/#{name}"
summary "#{path_name.camelize} for Ruby"
description 'Library to tail files in Ruby'
test_dir 'tests'
ignore '.*.sw[pon]', 'pkg', 'Gemfile.lock', 'coverage', '*.rbc', '.rbx'
readme 'README.rdoc'
dependency 'tins', '~>0.5'
development_dependency 'test-unit', '~>2.4.0'
install_library do
cd 'lib' do
libdir = CONFIG["sitelibdir"]
dest = File.join(libdir, 'file')
mkdir_p(dest)
dest = File.join(libdir, path_name)
install(path_name + '.rb', dest + '.rb', :verbose => true)
mkdir_p(dest)
for file in Dir[File.join(path_name, '*.rb')]
install(file, dest, :verbose => true)
end
end
bindir = CONFIG["bindir"]
install('bin/rtail', bindir, :verbose => true, :mode => 0755)
end
end
file-tail-1.0.12/VERSION 0000644 0000041 0000041 00000000007 12055510146 014535 0 ustar www-data www-data 1.0.12
file-tail-1.0.12/bin/ 0000755 0000041 0000041 00000000000 12055510146 014240 5 ustar www-data www-data file-tail-1.0.12/bin/rtail 0000755 0000041 0000041 00000002523 12055510146 015303 0 ustar www-data www-data #!/usr/bin/env ruby
require 'file/tail'
require 'tins/go'
include Tins::GO
require 'thread'
Thread.abort_on_exception = true
$opt = go 'n:m:Mh'
if $opt['h']
puts <
- !ruby/object:Gem::Version
version: 0.1.8
type: :development
prerelease: false
version_requirements: !ruby/object:Gem::Requirement
none: false
requirements:
- - ~>
- !ruby/object:Gem::Version
version: 0.1.8
- !ruby/object:Gem::Dependency
name: test-unit
requirement: !ruby/object:Gem::Requirement
none: false
requirements:
- - ~>
- !ruby/object:Gem::Version
version: 2.4.0
type: :development
prerelease: false
version_requirements: !ruby/object:Gem::Requirement
none: false
requirements:
- - ~>
- !ruby/object:Gem::Version
version: 2.4.0
- !ruby/object:Gem::Dependency
name: tins
requirement: !ruby/object:Gem::Requirement
none: false
requirements:
- - ~>
- !ruby/object:Gem::Version
version: '0.5'
type: :runtime
prerelease: false
version_requirements: !ruby/object:Gem::Requirement
none: false
requirements:
- - ~>
- !ruby/object:Gem::Version
version: '0.5'
description: Library to tail files in Ruby
email: flori@ping.de
executables: []
extensions: []
extra_rdoc_files:
- README.rdoc
- lib/file/tail/group.rb
- lib/file/tail/line_extension.rb
- lib/file/tail/logfile.rb
- lib/file/tail/tailer.rb
- lib/file/tail/version.rb
- lib/file/tail.rb
- lib/file-tail.rb
files:
- .gitignore
- .travis.yml
- CHANGES
- COPYING
- Gemfile
- README.rdoc
- Rakefile
- VERSION
- bin/rtail
- examples/pager.rb
- examples/tail.rb
- file-tail.gemspec
- lib/file-tail.rb
- lib/file/tail.rb
- lib/file/tail/group.rb
- lib/file/tail/line_extension.rb
- lib/file/tail/logfile.rb
- lib/file/tail/tailer.rb
- lib/file/tail/version.rb
- tests/file_tail_group_test.rb
- tests/file_tail_test.rb
- tests/test_helper.rb
homepage: http://github.com/flori/file-tail
licenses: []
post_install_message:
rdoc_options:
- --title
- File-tail - File::Tail for Ruby
- --main
- README.rdoc
require_paths:
- lib
required_ruby_version: !ruby/object:Gem::Requirement
none: false
requirements:
- - ! '>='
- !ruby/object:Gem::Version
version: '0'
segments:
- 0
hash: 677393849118984260
required_rubygems_version: !ruby/object:Gem::Requirement
none: false
requirements:
- - ! '>='
- !ruby/object:Gem::Version
version: '0'
requirements: []
rubyforge_project:
rubygems_version: 1.8.24
signing_key:
specification_version: 3
summary: File::Tail for Ruby
test_files:
- tests/file_tail_group_test.rb
- tests/file_tail_test.rb
- tests/test_helper.rb
file-tail-1.0.12/COPYING 0000644 0000041 0000041 00000043302 12055510146 014525 0 ustar www-data www-data GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
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
convey 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision 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, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
, 1 April 1989
Ty Coon, President of Vice
This 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 Library General
Public License instead of this License.
file-tail-1.0.12/Gemfile 0000644 0000041 0000041 00000000174 12055510146 014765 0 ustar www-data www-data # vim: set filetype=ruby et sw=2 ts=2:
source :rubygems
gemspec
group :development do
gem 'simplecov'
gem 'utils'
end
file-tail-1.0.12/CHANGES 0000644 0000041 0000041 00000011600 12055510146 014461 0 ustar www-data www-data 2012-05-31 * 1.0.10 * Use rewind to force IO#lineno to be reset.
2012-05-31 * 1.0.9 * Reopen file in :top mode at the beginning.
2011-12-24 * 1.0.8 * Support simplecov.
2011-07-15 * 1.0.7 * Use gem_hadar to shorten Rakefile.
2011-06-25 * 1.0.6 * Create a gem spec file again.
* Added a File::Tail::Group to tail multiple files more easily.
2010-03-25 * 1.0.5 * Added rtail executable, a nice app to supervise logfiles
and logdirs.
* Disabled creation of gem spec file.
* Cleaned up documentation a bit.
2009-08-21 * 1.0.4 * Fixed the threaded tests for Ruby 1.9.
* Create a gem spec file.
* Some cleanup.
2008-04-07 * 1.0.3 * Danny Colligan reported a
memory leak in long running scripts using file-tail. I
think this might be a ruby related problem, which is
caused/aggravated by using yield after having &block
parameter in a method. I changed file-tail to only use
block.call, which seems to improve the memory behaviour. I
am still not sure, where the problem actually stems
from, though.
2007-04-19 * 1.0.2 * make_doc.rb was missing from the source archive. Thanks to
Rick Ohnemus for reporting it.
2007-04-19 * 1.0.1 * Bugfix: File::Tail::Logfile#open with block, now closes
the file like File#open does. Found by Alex Doan
, ruby-talk:248383.
2007-03-30 * 1.0.0 * Bugfix: David.Barzilay@swisscom.com reported, that file
tails may skip some log file lines, after rotating it. I
think, that I fixed that problem.
I added a after_reopen callback as well, that is called
after reopening of the tailed file has occured.
* Removed rewind/wind methods even earlier than planned: I
placed the deprecation warning for rewind method in File
instead of File::Tail, which caused rewind to stop working
completely after loading file/tail. Duh! I blame vim's
matchit, because it jumped to the wrong end keyword.
2007-02-08 * 0.1.4 * Renamed rewind method to backward, and wind method to
forward, because someone already had the good idea to name
a method IO#rewind, which was overwritten by the mixed in
File::Tail methods. The old methods are now deprecated and
will be removed in a new 0.2.x version of the library.
* Added a bit more of documentation.
2005-08-20 * 0.1.3 * Applied LOAD_PATH patch by Daniel Berger, binary mode
changes were already in the CVS. Seemed to be like cheating
to me, though. ;)
* Skipping one windows test for the moment, too. Sigh!
2004-09-30 * 0.1.2 * First Rubyforge release
* Added Rakefile
* Supports gem build now.
2004-09-01 * 0.1.1 * Josh Endries found a bug
that caused File::Tail to malfunction on FreeBSD.
Hotfix: Use a side effect of seek to clearerr the tailed
file handle after EOFError has been raised.
2004-04-13 * 0.1.0 * API documentation with rdoc.
* return_if_eof attribute added.
* Added array return mode for finite tail call without block
given.
* install.rb now uses ruby version site_dir.
* Some code and directory structure cleanup.
2002-08-02 * 0.0.2 * Heavy refactoring, more and smaller methods
and expception handling
* Added check for inode and device equality of files
as suggested by
James F.Hranicky and
Curt Sampson to cover remove
rotation
* If filesize shrinks suddenly, File::Tail assumes that
copy and truncate rotation has happend: The file
is reopened and every new line is handled.
* NFS-Fix: Errno::ESTALE is caught.
* wind added to skip the first n lines, as
James F.Hranicky's suggested and changed
name of last-method to rewind, because I liked
his method names better than mine ;)
* Renamed next to tail either.
* The API has changed - but I think very few people
care at the moment.
* Lots of tests added.
2002-07-30 * 0.0.1 * Initial Release
file-tail-1.0.12/.gitignore 0000644 0000041 0000041 00000000060 12055510146 015454 0 ustar www-data www-data *.rbc
.*.sw[pon]
.rbx
Gemfile.lock
coverage
pkg
file-tail-1.0.12/lib/ 0000755 0000041 0000041 00000000000 12055510146 014236 5 ustar www-data www-data file-tail-1.0.12/lib/file-tail.rb 0000644 0000041 0000041 00000000024 12055510146 016425 0 ustar www-data www-data require 'file/tail'
file-tail-1.0.12/lib/file/ 0000755 0000041 0000041 00000000000 12055510146 015155 5 ustar www-data www-data file-tail-1.0.12/lib/file/tail/ 0000755 0000041 0000041 00000000000 12055510146 016106 5 ustar www-data www-data file-tail-1.0.12/lib/file/tail/group.rb 0000644 0000041 0000041 00000007011 12055510146 017566 0 ustar www-data www-data require 'thread'
class File
module Tail
# This class can be used to coordinate tailing of many files, which have
# been added to the group.
class Group
# Creates a new File::Tail::Group instance.
#
# The following options can be given as arguments:
# :files:: an array of files (or filenames to open) that are placed into
# the group.
def initialize(opts = {})
@tailers = ThreadGroup.new
if files = opts[:files]
Array(files).each { |file| add file }
end
end
# Creates a group for +files+ (IO instances or filename strings).
def self.[](*files)
new(:files => files)
end
# Add a file (IO instance) or filename (responding to to_str) to this
# group.
def add(file_or_filename)
if file_or_filename.respond_to?(:to_io)
add_file file_or_filename.to_io
elsif file_or_filename.respond_to?(:to_str)
add_filename file_or_filename
end
end
alias << add
# Add the IO instance +file+ to this group.
def add_file(file)
setup_file_tailer file
self
end
# Add a file created by opening +filename+ to this group after stepping
# +n+ lines backwards from the end of it.
def add_filename(filename, n = 0)
file = Logfile.open(filename.to_str, :backward => n)
file.backward n
setup_file_tailer file
self
end
# Iterate over all files contained in this group yielding to +block+ for
# each of them.
def each_file(&block)
each_tailer { |t| t.file }.map(&block)
end
# Iterate over all tailers in this group yielding to +block+ for each of
# them.
def each_tailer(&block)
@tailers.list.map(&block)
end
# Stop all tailers in this group at once.
def stop
each_tailer { |t| t.stop }
each_tailer { |t| t.join }
self
end
# Tail all the lines of all the files in the Tail::Group instance, that
# is yield to each of them.
#
# Every line is extended with the LineExtension module, that adds some
# methods to the line string. To get the path of the file this line was
# received from call line.file.path.
def tail
wait_for_activity do |tailer|
tailer.pending_lines.each do |line|
line.extend LineExtension
line.instance_variable_set :@tailer, tailer
yield line
end
end
end
private
def setup_file_tailer(file)
file.extend File::Tail
setup = ConditionVariable.new
mutex = Mutex.new
ft = nil
mutex.synchronize do
ft = Tailer.new do
t = Thread.current
t[:queue] = Queue.new
t[:file] = file
mutex.synchronize do
setup.signal
end
file.tail { |line| t[:queue] << line }
end
setup.wait mutex
end
@tailers.add ft
nil
end
# Wait until new input is receŃ–ved on any of the tailers in the group. If
# so call +block+ with all of these trailers as an argument.
def wait_for_activity(&block)
loop do
pending = each_tailer.select(&:pending_lines?)
if pending.empty?
interval = each_file.map { |t| t.interval }.compact.min || 0.1
sleep interval
else
pending.each(&block)
end
end
end
end
end
end
file-tail-1.0.12/lib/file/tail/version.rb 0000644 0000041 0000041 00000000434 12055510146 020121 0 ustar www-data www-data module File::Tail
# File::Tail version
VERSION = '1.0.12'
VERSION_ARRAY = VERSION.split(/\./).map { |x| x.to_i } # :nodoc:
VERSION_MAJOR = VERSION_ARRAY[0] # :nodoc:
VERSION_MINOR = VERSION_ARRAY[1] # :nodoc:
VERSION_BUILD = VERSION_ARRAY[2] # :nodoc:
end
file-tail-1.0.12/lib/file/tail/line_extension.rb 0000644 0000041 0000041 00000000555 12055510146 021463 0 ustar www-data www-data class File
module Tail
# This module is used to extend all lines received via one of the tailers
# of a File::Tail::Group.
module LineExtension
# The file as a File instance this line was read from.
def file
tailer.file
end
# This is the tailer this line was received from.
attr_reader :tailer
end
end
end
file-tail-1.0.12/lib/file/tail/logfile.rb 0000644 0000041 0000041 00000005552 12055510146 020063 0 ustar www-data www-data class File
module Tail
# This is an easy to use Logfile class that includes
# the File::Tail module.
#
# === Usage
# The unix command "tail -10f filename" can be emulated like that:
# File::Tail::Logfile.open(filename, :backward => 10) do |log|
# log.tail { |line| puts line }
# end
#
# Or a bit shorter:
# File::Tail::Logfile.tail(filename, :backward => 10) do |line|
# puts line
# end
#
# To skip the first 10 lines of the file do that:
# File::Tail::Logfile.open(filename, :forward => 10) do |log|
# log.tail { |line| puts line }
# end
#
# The unix command "head -10 filename" can be emulated like that:
# File::Tail::Logfile.open(filename, :return_if_eof => true) do |log|
# log.tail(10) { |line| puts line }
# end
class Logfile < File
include File::Tail
# This method creates an File::Tail::Logfile object and
# yields to it, and closes it, if a block is given, otherwise it just
# returns it. The opts hash takes an option like
# * :backward => 10 to go backwards
# * :forward => 10 to go forwards
# in the logfile for 10 lines at the start. The buffersize
# for going backwards can be set with the
# * :bufsiz => 8192 option.
# To define a callback, that will be called after a reopening occurs, use:
# * :after_reopen => lambda { |file| p file }
#
# Every attribute of File::Tail can be set with a :attributename =>
# value option.
def self.open(filename, opts = {}, &block) # :yields: file
file = new filename
opts.each do |o, v|
writer = o.to_s + "="
file.__send__(writer, v) if file.respond_to? writer
end
if opts.key?(:wind) or opts.key?(:rewind)
warn ":wind and :rewind options are deprecated, "\
"use :forward and :backward instead!"
end
if backward = opts[:backward] || opts[:rewind]
(args = []) << backward
args << opt[:bufsiz] if opts[:bufsiz]
file.backward(*args)
elsif forward = opts[:forward] || opts[:wind]
file.forward(forward)
end
if opts[:after_reopen]
file.after_reopen(&opts[:after_reopen])
end
if block_given?
begin
block.call file
ensure
file.close
nil
end
else
file
end
end
# Like open, but yields to every new line encountered in the logfile in
# +block+.
def self.tail(filename, opts = {}, &block)
if ([ :forward, :backward ] & opts.keys).empty?
opts[:backward] = 0
end
open(filename, opts) do |log|
log.tail { |line| block.call line }
end
end
end
end
end
file-tail-1.0.12/lib/file/tail/tailer.rb 0000644 0000041 0000041 00000002027 12055510146 017714 0 ustar www-data www-data class File
module Tail
# This class supervises activity on a tailed fail and collects newly read
# lines until the Tail::Group fetches and processes them.
class Tailer < ::Thread
# True if there are any lines pending on this Tailer, false otherwise.
def pending_lines?
!queue.empty?
end
# Fetch all the pending lines from this Tailer and thereby remove them
# from the Tailer's queue.
def pending_lines
Array.new(queue.size) { queue.deq(true) }
end
alias stop exit # Stop tailing this file and remove it from its File::Tail::Group.
# Return true if the thread local variable +id+ is defined or if this
# object responds to the method +id+.
def respond_to?(id)
!self[id].nil? || super
end
# Return the thread local variable +id+ if it is defined.
def method_missing(id, *args, &block)
if args.empty? && !(value = self[id]).nil?
value
else
super
end
end
end
end
end
file-tail-1.0.12/lib/file/tail.rb 0000644 0000041 0000041 00000023472 12055510146 016443 0 ustar www-data www-data class File
# This module can be included in your own File subclasses or used to extend
# files you want to tail.
module Tail
require 'file/tail/version'
require 'file/tail/logfile'
require 'file/tail/group'
require 'file/tail/tailer'
require 'file/tail/line_extension'
# This is the base class of all exceptions that are raised
# in File::Tail.
class TailException < Exception; end
# The DeletedException is raised if a file is
# deleted while tailing it.
class DeletedException < TailException; end
# The ReturnException is raised and caught
# internally to implement "tail -10" behaviour.
class ReturnException < TailException; end
# The BreakException is raised if the break_if_eof
# attribute is set to a true value and the end of tailed file
# is reached.
class BreakException < TailException; end
# The ReopenException is raised internally if File::Tail
# gets suspicious something unusual has happend to
# the tailed file, e. g., it was rotated away. The exception
# is caught and an attempt to reopen it is made.
class ReopenException < TailException
attr_reader :mode
# Creates an ReopenException object. The mode defaults to
# :bottom which indicates that the file
# should be tailed beginning from the end. :top
# indicates, that it should be tailed from the beginning from the
# start.
def initialize(mode = :bottom)
super(self.class.name)
@mode = mode
end
end
# The maximum interval File::Tail sleeps, before it tries
# to take some action like reading the next few lines
# or reopening the file.
attr_accessor :max_interval
# The start value of the sleep interval. This value
# goes against max_interval if the tailed
# file is silent for a sufficient time.
attr_accessor :interval
# If this attribute is set to a true value, File::Tail persists
# on reopening a deleted file waiting max_interval seconds
# between the attempts. This is useful if logfiles are
# moved away while rotation occurs but are recreated at
# the same place after a while. It defaults to true.
attr_accessor :reopen_deleted
# If this attribute is set to a true value, File::Tail
# attempts to reopen it's tailed file after
# suspicious_interval seconds of silence.
attr_accessor :reopen_suspicious
# The callback is called with _self_ as an argument after a reopen has
# occured. This allows a tailing script to find out, if a logfile has been
# rotated.
def after_reopen(&block)
@after_reopen = block
end
# This attribute is the invterval in seconds before File::Tail
# gets suspicious that something has happend to it's tailed file
# and an attempt to reopen it is made.
#
# If the attribute reopen_suspicious is
# set to a non true value, suspicious_interval is
# meaningless. It defaults to 60 seconds.
attr_accessor :suspicious_interval
# If this attribute is set to a true value, File::Fail's tail method
# raises a BreakException if the end of the file is reached.
attr_accessor :break_if_eof
# If this attribute is set to a true value, File::Fail's tail method
# just returns if the end of the file is reached.
attr_accessor :return_if_eof
# Default buffer size, that is used while going backward from a file's end.
# This defaults to nil, which means that File::Tail attempts to derive this
# value from the filesystem block size.
attr_accessor :default_bufsize
# Skip the first n lines of this file. The default is to don't
# skip any lines at all and start at the beginning of this file.
def forward(n = 0)
rewind
while n > 0 and not eof?
readline
n -= 1
end
self
end
# Rewind the last n lines of this file, starting
# from the end. The default is to start tailing directly from the
# end of the file.
#
# The additional argument bufsize is
# used to determine the buffer size that is used to step through
# the file backwards. It defaults to the block size of the
# filesystem this file belongs to or 8192 bytes if this cannot
# be determined.
def backward(n = 0, bufsize = nil)
if n <= 0
seek(0, File::SEEK_END)
return self
end
bufsize ||= default_bufsize || stat.blksize || 8192
size = stat.size
begin
if bufsize < size
seek(0, File::SEEK_END)
while n > 0 and tell > 0 do
start = tell
seek(-bufsize, File::SEEK_CUR)
buffer = read(bufsize)
n -= buffer.count("\n")
seek(-bufsize, File::SEEK_CUR)
end
else
rewind
buffer = read(size)
n -= buffer.count("\n")
rewind
end
rescue Errno::EINVAL
size = tell
retry
end
pos = -1
while n < 0 # forward if we are too far back
pos = buffer.index("\n", pos + 1)
n += 1
end
seek(pos + 1, File::SEEK_CUR)
self
end
# This method tails this file and yields to the given block for
# every new line that is read.
# If no block is given an array of those lines is
# returned instead. (In this case it's better to use a
# reasonable value for n or set the
# return_if_eof or break_if_eof
# attribute to a true value to stop the method call from blocking.)
#
# If the argument n is given, only the next n
# lines are read and the method call returns. Otherwise this method
# call doesn't return, but yields to block for every new line read from
# this file for ever.
def tail(n = nil, &block) # :yields: line
@n = n
result = []
array_result = false
unless block
block = lambda { |line| result << line }
array_result = true
end
preset_attributes unless @lines
loop do
begin
restat
read_line(&block)
redo
rescue ReopenException => e
until eof? || @n == 0
block.call readline
@n -= 1 if @n
end
reopen_file(e.mode)
@after_reopen.call self if @after_reopen
rescue ReturnException
return array_result ? result : nil
end
end
end
private
def read_line(&block)
if @n
until @n == 0
block.call readline
@lines += 1
@no_read = 0
@n -= 1
output_debug_information
end
raise ReturnException
else
block.call readline
@lines += 1
@no_read = 0
output_debug_information
end
rescue EOFError
seek(0, File::SEEK_CUR)
raise ReopenException if @reopen_suspicious and
@no_read > @suspicious_interval
raise BreakException if @break_if_eof
raise ReturnException if @return_if_eof
sleep_interval
rescue Errno::ENOENT, Errno::ESTALE, Errno::EBADF
raise ReopenException
end
def preset_attributes
@reopen_deleted = true if @reopen_deleted.nil?
@reopen_suspicious = true if @reopen_suspicious.nil?
@break_if_eof = false if @break_if_eof.nil?
@return_if_eof = false if @return_if_eof.nil?
@max_interval ||= 10
@interval ||= @max_interval
@suspicious_interval ||= 60
@lines = 0
@no_read = 0
end
def restat
stat = File.stat(path)
if @stat
if stat.ino != @stat.ino or stat.dev != @stat.dev
@stat = nil
raise ReopenException.new(:top)
end
if stat.size < @stat.size
@stat = nil
raise ReopenException.new(:top)
end
else
@stat = stat
end
rescue Errno::ENOENT, Errno::ESTALE
raise ReopenException
end
def sleep_interval
if @lines > 0
# estimate how much time we will spend on waiting for next line
@interval = (@interval.to_f / @lines)
@lines = 0
else
# exponential backoff if logfile is quiet
@interval *= 2
end
if @interval > @max_interval
# max. wait @max_interval
@interval = @max_interval
end
output_debug_information
sleep @interval
@no_read += @interval
end
def reopen_file(mode)
$DEBUG and $stdout.print "Reopening '#{path}', mode = #{mode}.\n"
@no_read = 0
reopen(path)
if mode == :bottom
backward
elsif mode == :top
forward
end
rescue Errno::ESTALE, Errno::ENOENT
if @reopen_deleted
sleep @max_interval
retry
else
raise DeletedException
end
end
def output_debug_information
$DEBUG or return
STDERR.puts({
:path => path,
:lines => @lines,
:interval => @interval,
:no_read => @no_read,
:n => @n,
}.inspect)
self
end
end
end
if $0 == __FILE__
filename = ARGV.shift or fail "Usage: #$0 filename [number]"
number = (ARGV.shift || 0).to_i
File.open(filename) do |log|
log.extend(File::Tail)
# Some settings to make watching tail.rb with "ruby -d" fun
log.interval = 1
log.max_interval = 5
log.reopen_deleted = true # is default
log.reopen_suspicious = true # is default
log.suspicious_interval = 20
number >= 0 ? log.backward(number, 8192) : log.forward(-number)
#loop do # grab 5 lines at a time and return
# log.tail(5) { |line| puts line }
# print "Got 5!\n"
#end
log.tail { |line| puts line }
end
end
file-tail-1.0.12/file-tail.gemspec 0000644 0000041 0000041 00000003747 12055510146 016716 0 ustar www-data www-data # -*- encoding: utf-8 -*-
Gem::Specification.new do |s|
s.name = "file-tail"
s.version = "1.0.12"
s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
s.authors = ["Florian Frank"]
s.date = "2012-10-02"
s.description = "Library to tail files in Ruby"
s.email = "flori@ping.de"
s.extra_rdoc_files = ["README.rdoc", "lib/file/tail/group.rb", "lib/file/tail/line_extension.rb", "lib/file/tail/logfile.rb", "lib/file/tail/tailer.rb", "lib/file/tail/version.rb", "lib/file/tail.rb", "lib/file-tail.rb"]
s.files = [".gitignore", ".travis.yml", "CHANGES", "COPYING", "Gemfile", "README.rdoc", "Rakefile", "VERSION", "bin/rtail", "examples/pager.rb", "examples/tail.rb", "file-tail.gemspec", "lib/file-tail.rb", "lib/file/tail.rb", "lib/file/tail/group.rb", "lib/file/tail/line_extension.rb", "lib/file/tail/logfile.rb", "lib/file/tail/tailer.rb", "lib/file/tail/version.rb", "tests/file_tail_group_test.rb", "tests/file_tail_test.rb", "tests/test_helper.rb"]
s.homepage = "http://github.com/flori/file-tail"
s.rdoc_options = ["--title", "File-tail - File::Tail for Ruby", "--main", "README.rdoc"]
s.require_paths = ["lib"]
s.rubygems_version = "1.8.24"
s.summary = "File::Tail for Ruby"
s.test_files = ["tests/file_tail_group_test.rb", "tests/file_tail_test.rb", "tests/test_helper.rb"]
if s.respond_to? :specification_version then
s.specification_version = 3
if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
s.add_development_dependency(%q, ["~> 0.1.8"])
s.add_development_dependency(%q, ["~> 2.4.0"])
s.add_runtime_dependency(%q, ["~> 0.5"])
else
s.add_dependency(%q, ["~> 0.1.8"])
s.add_dependency(%q, ["~> 2.4.0"])
s.add_dependency(%q, ["~> 0.5"])
end
else
s.add_dependency(%q, ["~> 0.1.8"])
s.add_dependency(%q, ["~> 2.4.0"])
s.add_dependency(%q, ["~> 0.5"])
end
end