Doc #54586 [Opn]: not documented that exec returns -1 if pcntl_signal(SIGCHLD,.. is used

Edit report at http://bugs.php.net/bug.php?id=54586&edit=1 ID: 54586 Updated by: frozenfire@php.net Reported by: johncart at cisco dot com Summary: not documented that exec returns -1 if pcntl_signal(SIGCHLD,.. is used Status: Open Type: Documentation Problem Package: Documentation problem Operating System: n/a PHP Version: 5.3.6 Block user comment: N Private report: N New Comment: I feel that this edge-case is obscure enough that it's not really worth documenting. The reason why exec() will return false when binding a handler to SIGCHLD is that the handler is intercepting the result before it can "bubble" down to the native signal handler. Anyone with the expertise to be installing POSIX signal handlers should already be aware that they're intercepting process behaviours, and should be able to code around this. Previous Comments: ------------------------------------------------------------------------ [2011-04-21 11:02:27] johncart at cisco dot com Description: ------------ If pcntl_signal(SIGCHLD,... has been used then exec() will always have a return code of -1. This gotcha should be documented. Someone's added a comment with details: http://us.php.net/manual/en/function.exec.php#76687 Test script: --------------- n/a ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54586&edit=1