From: joe dot maldonado at gmail dot com
Operating system: Linux kernel 2.4.25
PHP version: 5.0.5
PHP Bug Type: Scripting Engine problem
Bug description: pcntl_waitpid blocks signal handling
Description:
------------
Ran a test script using pcntl_waitpid (below) to see if it could be
interrupted via a signal. The result was that the child process was not
terminated upon sending the parent a signal.
Reproduce code:
---------------
#!/usr/local/bin/php -c/usr/local/lib/php.ini
<?php
declare(ticks = 1);
$child_pid = 0;
function sig_handler($signo) {
global $child_pid;
echo "got signal {$signo}\n";
echo "Child pid = $child_pid\n";
if ($child_pid != 0) {
posix_kill($child_pid, SIGTERM);
}
exit(0);
}
if (!pcntl_signal(SIGTERM, "sig_handler", true))
echo "did not install sigterm\n";
function run_child() {
global $child_pid;
$child_pid = pcntl_fork();
if ($child_pid == -1) {
echo "fork failed\n";
} else if ($child_pid > 0) {
echo "parent = " . getmypid() . "\n";
echo "child = {$child_pid}\n";
echo "waiting...\n";
pcntl_waitpid($child_pid, $status);
} else {
$cmd = "/root/sigchild.sh";
exec($cmd);
echo "could not exec child";
}
}
run_child();
?>
contents of sigchild.sh
!/bin/sh
sleep 100;
echo "done sleeping"
Expected result:
----------------
When a SIGTERM is sent to the parent process it should be handled by the
signal handler and pass the signal to the child process, then exit.
Actual result:
--------------
when a SIGTERM is sent to the parent process it is not currently being
handled, instead the child will continue to sleep and exit normally.
--
Edit bug report at http://bugs.php.net/?id=35244&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=35244&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=35244&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=35244&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=35244&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=35244&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=35244&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=35244&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=35244&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=35244&r=support
Expected behavior: http://bugs.php.net/fix.php?id=35244&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=35244&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=35244&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=35244&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35244&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=35244&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=35244&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=35244&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=35244&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=35244&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=35244&r=mysqlcfg
