/usr/lib/ruby/2.3.0/shell/system-command.rb is in libruby2.3 2.3.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | # frozen_string_literal: false
#
# shell/system-command.rb -
# $Release Version: 0.7 $
# $Revision$
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
require "shell/filter"
class Shell
class SystemCommand < Filter
def initialize(sh, command, *opts)
if t = opts.find{|opt| !opt.kind_of?(String) && opt.class}
Shell.Fail Error::TypeError, t.class, "String"
end
super(sh)
@command = command
@opts = opts
@input_queue = Queue.new
@pid = nil
sh.process_controller.add_schedule(self)
end
attr_reader :command
alias name command
def wait?
@shell.process_controller.waiting_job?(self)
end
def active?
@shell.process_controller.active_job?(self)
end
def input=(inp)
super
if active?
start_export
end
end
def start
notify([@command, *@opts].join(" "))
@pid, @pipe_in, @pipe_out = @shell.process_controller.sfork(self) {
Dir.chdir @shell.pwd
$0 = @command
exec(@command, *@opts)
}
if @input
start_export
end
start_import
end
def flush
@pipe_out.flush if @pipe_out and !@pipe_out.closed?
end
def terminate
begin
@pipe_in.close
rescue IOError
end
begin
@pipe_out.close
rescue IOError
end
end
def kill(sig)
if @pid
Process.kill(sig, @pid)
end
end
def start_import
notify "Job(%id) start imp-pipe.", @shell.debug?
_eop = true
Thread.start {
begin
while l = @pipe_in.gets
@input_queue.push l
end
_eop = false
rescue Errno::EPIPE
_eop = false
ensure
if !ProcessController::USING_AT_EXIT_WHEN_PROCESS_EXIT and _eop
notify("warn: Process finishing...",
"wait for Job[%id] to finish pipe importing.",
"You can use Shell#transact or Shell#check_point for more safe execution.")
redo
end
notify "job(%id}) close imp-pipe.", @shell.debug?
@input_queue.push :EOF
@pipe_in.close
end
}
end
def start_export
notify "job(%id) start exp-pipe.", @shell.debug?
_eop = true
Thread.start{
begin
@input.each do |l|
ProcessController::block_output_synchronize do
@pipe_out.print l
end
end
_eop = false
rescue Errno::EPIPE, Errno::EIO
_eop = false
ensure
if !ProcessController::USING_AT_EXIT_WHEN_PROCESS_EXIT and _eop
notify("shell: warn: Process finishing...",
"wait for Job(%id) to finish pipe exporting.",
"You can use Shell#transact or Shell#check_point for more safe execution.")
redo
end
notify "job(%id) close exp-pipe.", @shell.debug?
@pipe_out.close
end
}
end
alias super_each each
def each(rs = nil)
while (l = @input_queue.pop) != :EOF
yield l
end
end
# ex)
# if you wish to output:
# "shell: job(#{@command}:#{@pid}) close pipe-out."
# then
# mes: "job(%id) close pipe-out."
# yorn: Boolean(@shell.debug? or @shell.verbose?)
def notify(*opts)
@shell.notify(*opts) do |mes|
yield mes if iterator?
mes.gsub!("%id", "#{@command}:##{@pid}")
mes.gsub!("%name", "#{@command}")
mes.gsub!("%pid", "#{@pid}")
mes
end
end
end
end
|