From: Operating system: CentOS 5.5 PHP version: 5.3.3 Package: PCNTL related Bug Type: Bug Bug description:No SIGCHLD signal received
Description: ------------ The included CLI test script forks a child process and should terminate when the child process finishes after two seconds with the message that SIGCHLD signal (17) was received. This works as expected on my Fedora system with PHP 5.3.3-1 installed, but the process never receives SIGCHLD on my CentOS system with identically built PHP 5.3.3-1. The configure line for the CentOS system is the one below, the Fedora one is the same except for some differences in paths but not options: './configure' '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/usr/com' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--cache-file=../config.cache' '--with-libdir=lib64' '--with-config-file-path=/etc' '--with-config-file-scan-dir=/etc/php.d' '--disable-debug' '--with-pic' '--disable-rpath' '--without-pear' '--with-bz2' '--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '--enable-gd-native-ttf' '--with-t1lib=/usr' '--without-gdbm' '--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-dir=/usr' '--with-openssl' '--with-pcre-regex=/usr' '--with-zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' '--enable-sysvsem' '--enable-sysvshm' '--enable-sysvmsg' '--with-kerberos' '--enable-ucd-snmp-hack' '--enable-shmop' '--enable-calendar' '--with-libxml-dir=/usr' '--enable-xml' '--with-apxs2=/usr/sbin/apxs' '--without-mysql' '--without-gd' '--disable-dom' '--disable-dba' '--without-unixODBC' '--disable-pdo' '--disable-xmlreader' '--disable-xmlwriter' '--without-sqlite' '--without-sqlite3' '--disable-phar' '--disable-fileinfo' '--disable-json' '--without-pspell' '--disable-wddx' '--without-curl' '--disable-posix' '--disable-sysvmsg' '--disable-sysvshm' '--disable-sysvsem' I rebuilt the CentOS PHP with explicit option --disable-sigchld but that didn't help, it is the default after all. Test script: --------------- <?php if (($pid = pcntl_fork()) === 0) usleep(2000000); else if ($pid !== -1) { $signals = array(SIGINT, SIGCHLD); pcntl_sigprocmask(SIG_BLOCK, $signals, $prevSignals); $signal = pcntl_sigwaitinfo($signals, $info); echo "received signal ${signal}\n"; } Expected result: ---------------- > php test.php received signal 17 Actual result: -------------- > php test.php process runs forever until SIGINT is received (CTRL+C), the child process is defunct after two seconds -- Edit bug report at http://bugs.php.net/bug.php?id=52992&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=52992&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=52992&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=52992&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=52992&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=52992&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=52992&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=52992&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=52992&r=needscript Try newer version: http://bugs.php.net/fix.php?id=52992&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=52992&r=support Expected behavior: http://bugs.php.net/fix.php?id=52992&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=52992&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=52992&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=52992&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52992&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=52992&r=dst IIS Stability: http://bugs.php.net/fix.php?id=52992&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=52992&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=52992&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=52992&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=52992&r=mysqlcfg