From: kshukri at empirica-delasasse dot de
Operating system: debian 3.0 with linux 2.4.24
PHP version: 4.3.4
PHP Bug Type: POSIX related
Bug description: pcntl_waitpid with WNOHANG | WUNTRACED same as WNOHANG
Description:
------------
pcntl_waitpid with option WNOHANG | WUNTRACED behaves just like WNOHANG
alone, that means it never returns PID of children that have exited
before.
This could be a bug in Linux too.
Please excuse me if I just don't understand the way pcntl_waitpid should
work.
Here's my php config:
./configure --with-apxs --with-config-file-path=/usr/local/lib --with-zlib
--enable-ftp --enable-calendar --enable-track-vars --with-pgsql
--with-unixodbc --with-mysql --enable-sigchild --enable-pcntl --with-gd
--enable-cli --with-snmp --enable-ucd-snmp-hack --with-openssl
--enable-sockets --prefix=/usr/local/stow/php-4.3.4 --with-curl
Reproduce code:
---------------
function CheckExited () {
while (($c=pcntl_waitpid(-1, $stat, WUNTRACED | WNOHANG))>0) {
ExitTest($c,$stat);
}
}
function ExitTest($c,$stat) { blabla..;}
while ($condition) {
.
.
.
$CHILD_PID = pcntl_fork();
.
.
.
CheckExited();
}
Expected result:
----------------
pcntl_waitpid(...WNOHANG|WUNTRACED) should return PIDs of all children
that have exited since the last call of CheckExited().
Actual result:
--------------
pcntl_waitpid(...WNOHANG|WUNTRACED) doesn't return any PIDs
--
Edit bug report at http://bugs.php.net/?id=27993&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27993&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27993&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27993&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27993&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27993&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27993&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27993&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27993&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27993&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27993&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27993&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27993&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27993&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27993&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27993&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27993&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27993&r=float
