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# File 'lib/rbbt/util/cmd.rb', line 29
def self.cmd(cmd, options = {}, &block)
options = Misc.add_defaults options, :stderr => Log::DEBUG
in_content = options.delete(:in)
stderr = options.delete(:stderr)
pipe = options.delete(:pipe)
post = options.delete(:post)
log = options.delete(:log)
no_fail = options.delete(:no_fail)
no_wait = options.delete(:no_wait)
dont_close_in = options.delete(:dont_close_in)
log = true if log.nil?
if stderr == true
stderr = Log::HIGH
end
cmd_options = process_cmd_options options
if cmd =~ /'\{opt\}'/
cmd.sub!('\'{opt}\'', cmd_options)
else
cmd << " " << cmd_options
end
in_content = StringIO.new in_content if String === in_content
sout, serr, sin = Misc.pipe, Misc.pipe, Misc.pipe
pid = fork {
begin
Misc.purge_pipes(sin.last,sout.last,serr.last)
sin.last.close
sout.first.close
serr.first.close
if IO === in_content
in_content.close if in_content.respond_to?(:close) and not in_content.closed?
in_content.join if in_content.respond_to?(:join) and not in_content.joined?
end
STDERR.reopen serr.last
serr.last.close
STDIN.reopen sin.first
sin.first.close
STDOUT.reopen sout.last
sout.last.close
STDOUT.sync = STDERR.sync = true
exec(ENV, cmd)
exit(-1)
rescue Exception
Log.debug{ "ProcessFailed: #{$!.message}" } if log
Log.debug{ "Backtrace: \n" + $!.backtrace * "\n" } if log
raise ProcessFailed, $!.message
end
}
sin.first.close
sout.last.close
serr.last.close
sin = sin.last
sout = sout.first
serr = serr.first
Log.debug{"CMD: [#{pid}] #{cmd}" if log}
if in_content.respond_to?(:read)
in_thread = Thread.new(Thread.current) do |parent|
begin
begin
while c = in_content.readpartial(Misc::BLOCK_SIZE)
sin << c
end
rescue EOFError
end
sin.close unless sin.closed?
unless dont_close_in
in_content.close unless in_content.closed?
in_content.join if in_content.respond_to? :join
end
rescue
parent.raise $!
Process.kill "INT", pid
ensure
sin.close unless sin.closed?
end
end
else
in_thread = nil
sin.close
end
pids = [pid]
if pipe
err_thread = Thread.new do
while line = serr.gets
Log.log "STDERR [#{pid}]: " + line, stderr if Integer === stderr and log
end
serr.close
end
ConcurrentStream.setup sout, :pids => pids, :threads => [in_thread, err_thread].compact, :autojoin => no_wait, :no_fail => no_fail
sout
else
err = ""
err_thread = Thread.new do
while not serr.eof?
err << serr.gets if Integer === stderr
end
serr.close
end
ConcurrentStream.setup sout, :pids => pids, :threads => [in_thread, err_thread].compact, :autojoin => no_wait, :no_fail => no_fail
out = StringIO.new sout.read
sout.close unless sout.closed?
Process.waitpid pid
if not $?.success? and not no_fail
raise ProcessFailed.new "Command [#{pid}] #{cmd} failed with error status #{$?.exitstatus}.\n#{err}"
else
Log.log err, stderr if Integer === stderr and log
end
out
end
end
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