Bug #74685 [Opn->Fbk]: signal listion is wrong

Edit report at https://bugs.php.net/bug.php?id=74685&edit=1 ID: 74685 Updated by: requinix@php.net Reported by: shan dot liu at msn dot com Summary: signal listion is wrong -Status: Open +Status: Feedback Type: Bug Package: PCNTL related Operating System: Linux PHP Version: 7.1.3 Block user comment: N Private report: N New Comment: You're misunderstanding what is happening. Change the child's sleep to 10 seconds, run, kill the parent, and DON'T kill the child. Just wait. Previous Comments: ------------------------------------------------------------------------ [2017-06-02 01:20:17] shan dot liu at msn dot com PHP CODE: <?php pcntl_fork() && exit; $parent = posix_getpid(); if ($child = pcntl_fork()) { echo "parent: parent is " . posix_getpid() . "\n"; echo "parent: child is {$child}\n"; echo "parent running\n"; } else { echo "child running\n"; sleep(1000); //child processes not register signal exit;//child processes stop here } //only parent run this code... pcntl_signal(SIGTERM, function() use ($child) { echo $child ? "parent sigterm\n" : "child sigterm\n"; }); declare(ticks = 1){ while (true){ //on term kill parent processes ,no response //but i kill child processes,parent processes receive a term signal,why? $pid=pcntl_wait($status); if($pid==-1)break; } } ?> // test history... // [root@rabbitmq-node02 gs]# php -v // PHP 7.1.3 (cli) (built: Mar 21 2017 10:38:32) ( NTS ) // Copyright (c) 1997-2017 The PHP Group // Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies // with Zend OPcache v7.1.3, Copyright (c) 1999-2017, by Zend Technologies // [root@rabbitmq-node02 gs]# php tt.php // parent: parent is 77506 // parent: child is 77507 // parent running // child running // [root@rabbitmq-node02 gs]# kill 77506 // kill parent processes,No output // [root@rabbitmq-node02 gs]# kill 77507 //kill child processes,parent processes receive a term signal,why,child not register signal function // [root@rabbitmq-node02 gs]# parent sigterm ------------------------------------------------------------------------ [2017-06-02 01:17:29] shan dot liu at msn dot com pcntl_fork() && exit; $parent = posix_getpid(); if ($child = pcntl_fork()) { echo "parent: parent is " . posix_getpid() . "\n"; echo "parent: child is {$child}\n"; echo "parent running\n"; } else { echo "child running\n"; sleep(1000); //child processes not register signal exit;//child processes stop here } //only parent run this code... pcntl_signal(SIGTERM, function() use ($child) { echo $child ? "parent sigterm\n" : "child sigterm\n"; }); declare(ticks = 1){ while (true){ //on term kill parent processes ,no response //but i kill child processes,parent processes receive a term signal,why? $pid=pcntl_wait($status); if($pid==-1)break; } } // [root@rabbitmq-node02 gs]# php -v // PHP 7.1.3 (cli) (built: Mar 21 2017 10:38:32) ( NTS ) // Copyright (c) 1997-2017 The PHP Group // Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies // with Zend OPcache v7.1.3, Copyright (c) 1999-2017, by Zend Technologies // [root@rabbitmq-node02 gs]# php tt.php // parent: parent is 77506 // parent: child is 77507 // parent running // child running // [root@rabbitmq-node02 gs]# kill 77506 // kill parent processes,No output // [root@rabbitmq-node02 gs]# kill 77507 //kill child processes,parent processes receive a term signal,why,child not register signal function // [root@rabbitmq-node02 gs]# parent sigterm ------------------------------------------------------------------------ [2017-06-01 10:40:34] requinix@php.net > kill parent id,not output > kill child id,is output:parent id I think you have that backwards. Are you sure you were killing the right processes? Here's a test script I just wrote: https://pastebin.com/vwGiFYGT It all seems to be working correctly for me. ------------------------------------------------------------------------ [2017-06-01 09:42:42] requinix@php.net Oh, wait, I misread that. ------------------------------------------------------------------------ [2017-06-01 09:40:53] requinix@php.net Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.php.net/how-to-report.php If you can provide more information, feel free to add it to this bug and change the status back to "Open". Thank you for your interest in PHP. signal_pro won't fire if you kill the parent, and when you kill the child posix_getpid will return the PID of the current process (which is the parent). What do you think it should do? ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=74685 -- Edit this bug report at https://bugs.php.net/bug.php?id=74685&edit=1