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#!/usr/bin/ruby
#
# send-hook-info.rb: test helper script that reads a hook info dump from
# a specified file and sends it to a specified command
# through a file descriptor (useful to test
# "apt-listbugs apt" without the need to invoke APT)
#
# Copyright (C) 2013 Google Inc
# Copyright (C) 2013-2014 Francesco Poli <invernomuto@paranoici.org>
#
# 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 with
# the Debian GNU/Linux distribution in file /usr/share/common-licenses/GPL-2;
# if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA 02111-1307 USA
#
def usage
$stderr.print "Usage: ", $0, " <file> <command>\n"
end
# parse command-line arguments
if ARGV.length != 2
usage
exit 1
end
file = ARGV[0]
command = ARGV[1]
# check whether the specified file actually exists
if ! FileTest.exist?(file)
$stderr.print "Cannot find file \"#{file}\"\n"
exit 2
end
read_fd, write_fd = IO.pipe
# this variable tells the child command (e.g.: apt-listbugs) which
# file descriptor to read from
ENV['APT_HOOK_INFO_FD'] = read_fd.to_i.to_s
puts "APT_HOOK_INFO_FD set to #{ENV['APT_HOOK_INFO_FD']}"
if Process.fork().nil?
# the child
write_fd.close
exec command, read_fd=>read_fd
read_fd.close
exit 0
else
# the parent
read_fd.close
begin
open(file).each { |line|
write_fd.puts "#{line}"
}
rescue Errno::EACCES
$stderr.print "Cannot read from file \"#{file}\"\n"
exit 3
end
write_fd.close
Process.waitall
end
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