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| | #!/usr/bin/ruby
# frozen_string_literal: true
# Copyright (C) mwrap hackers <mwrap-public@80x24.org>
# License: GPL-2.0+ <https://www.gnu.org/licenses/gpl-2.0.txt>
help = <<EOM
usage: mwrap COMMAND [ARGS]
see https://80x24.org/mwrap/README.html for more info
EOM
ARGV.empty? and abort help
ARGV.each do |x|
case x
when '--version', '-v'
require 'mwrap/version'
puts "mwrap #{Mwrap::VERSION} - #{RUBY_DESCRIPTION}"
exit 0
when '--help', '-h'
puts help
exit 0
else # don't intercept --version/--help intended for commands we wrap
break
end
end
require 'mwrap'
mwrap_so = $".grep(%r{/mwrap\.so\z})[0] or abort "mwrap.so not loaded"
cur = ENV['LD_PRELOAD']
if cur
cur = cur.split(/[:\s]+/)
if !cur.include?(mwrap_so)
# drop old versions
cur.delete_if { |path| path.end_with?('/mwrap.so') }
cur.unshift(mwrap_so)
ENV['LD_PRELOAD'] = cur.join(':')
end
else
ENV['LD_PRELOAD'] = mwrap_so
end
# work around close-on-exec by default behavior in Ruby:
opts = {}
if ENV['MWRAP'] =~ /dump_fd:(\d+)/
dump_fd = $1.to_i
if dump_fd > 2
dump_io = IO.new(dump_fd)
opts[dump_fd] = dump_io
end
end
# allow inheriting FDs from systemd
n = ENV['LISTEN_FDS']
if n && ENV['LISTEN_PID'].to_i == $$
n = 3 + n.to_i
(3...n).each { |fd| opts[fd] = IO.new(fd) }
end
exec *ARGV, opts
|