#37367 [Opn->Fbk]: WNOHANG option causes no PID to be returned.

ID: 37367 Updated by: tony2001@php.net Reported By: doprea at chimesnet dot com -Status: Open +Status: Feedback Bug Type: PCNTL related Operating System: Fedora 4 PHP Version: 5.1.4 New Comment: Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If possible, make the script source available online and provide an URL to it here. Try to avoid embedding huge scripts into the report. Previous Comments: ------------------------------------------------------------------------ [2006-05-08 16:59:55] doprea at chimesnet dot com Sorry for the multiple posts: There is only one file at that location, called 'multitiered.php'. Clearly, I'm losing my mind. ------------------------------------------------------------------------ [2006-05-08 16:58:07] doprea at chimesnet dot com Please use email address doprea at chimesnet dot com. ------------------------------------------------------------------------ [2006-05-08 16:56:44] doprea@php.net (email change.) ------------------------------------------------------------------------ [2006-05-08 16:55:22] doprea at chimesnet dot com Description: ------------ Thanks in advance for helping me to resolve this issue-- It will be a great help!! Passing the WNOHANG option will cause pcntl_wait() and pcntl_waitpid() to never return a PID, but only 0 or -1 (0 before a child returns, and -1 after). I have tested this under version 5.0.4-10, 5.1.2-5, and 5.1.4, both with and without the --enable-sigchild build option. Reproduce code: --------------- ftp://www.redplanet5.net, user= temp@redplanet5.net, pass= temp. Expected result: ---------------- It will fork a child from the parent, and then a second child from the first. If you send a TERM from the shell to the first child, it will attempt to end the second child, and report whether or not it received an acceptable wait() response. Just remove the WNOHANG flag and it works flawlessly. As written, the WNOHANG option was passed to the pcntl_wait() function, and the program will report that "there may have been a problem with the termination of the child." Actual result: -------------- If the WNOHANG option is removed, the program says that the child exited nicely. This should be the case regardless of whether or not the WNOHANG option was passed. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=37367&edit=1