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test/ruby/test_process.rb: test for fd=3 usability in child

Ensure we can redirect anything to fd=3 in a child process.  This
test exists because fd=3 is a commonly reserved FD for a timer
thread pipe in the parent Ruby VM, but fd=3 is the first FD used by
the sd_listen_fds function for systemd.

This means there is a possibility for a bug to slip in where the
redirect to fd=3 fails to work.  This test should ensure the
continued viability of systemd replacements in Ruby :>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51146 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
normal 2015-07-05 00:40:14 +00:00
parent 4ea870cdb1
commit 033e8e5b61
2 changed files with 28 additions and 0 deletions

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@ -1,3 +1,7 @@
Sun Jul 5 09:31:40 2015 Eric Wong <e@80x24.org>
* test/ruby/test_process.rb: test for fd=3 usability in child
Sat Jul 4 19:43:31 2015 SHIBATA Hiroshi <hsbt@ruby-lang.org>
* Add test case for empty array and first method with args.

View file

@ -2029,4 +2029,28 @@ EOS
}
assert_equal(th, x)
end if defined?(fork)
def test_exec_fd_3_redirect
# ensure we can redirect anything to fd=3 in a child process.
# fd=3 is a commonly reserved FD for the timer thread pipe in the
# parent, but fd=3 is the first FD used by the sd_listen_fds function
# for systemd
assert_separately(['-', RUBY], <<-INPUT, timeout: 60)
ruby = ARGV.shift
begin
a = IO.pipe
b = IO.pipe
pid = fork do
exec ruby, '-e', 'print IO.for_fd(3).read(1)', 3 => a[0], 1 => b[1]
end
b[1].close
a[0].close
a[1].write('.')
assert_equal ".", b[0].read(1)
ensure
a.each(&:close) if a
b.each(&:close) if b
end
INPUT
end if defined?(fork)
end