You probably want to close STDIN and STDERR too

You probably don't want to do any of this stuff, but you'll find you have to... :(

Even though the valuable information found by following links to merlyn's nodes/articles elsewhere in this thread only talk about closing STDOUT, I found I had to close STDIN and STDERR, as well. This is for Apache 2. I had to jump through some hoops to redirect the child's STDERR to a file and later send anything found there to the apache error_log, rather than lose any STDERR output produced by the child... a bit ugly, but it works.

Also, I found I had to reopen all 3 filehandles (to/from /dev/null for STDOUT and STDIN, to a file for STDERR) as well, since my child is opening other files, and if you just close STD(IN|OUT|ERR), the next time you open a file it will get file descriptor 0, 1, or 2, which is essentially reopening STD(IN|OUT|ERR), and I found this causes apache to hang again! Ugh. forker beware!

HTH

--
edan

In reply to Re: Re: Re: Closing parent CGI after fork() by edan
in thread Closing parent CGI after fork() by hambo

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