[Rpm-maint] [rpm] Add lua function posix.close (#44)

Zbigniew Jędrzejewski-Szmek notifications at github.com
Wed Mar 2 19:29:52 UTC 2016

OK, so... I could add `open` and `dup2`. But maybe a better option is to add a higher level call like `util.close_stderr` that would do
   if (!have_forked)
	return luaL_error(L, "exec not permitted in this context");
   fd = open('/dev/null', 'w');
   if (fd == 2)
       return pushresult(L, 0, NULL);
   return pushresult(L, dup2(fd, 2), NULL);
and similar for `util.close_stdout`. This should be easy to use in scriptlets and hard to abuse.

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