From: arekm at maven dot pl Operating system: PHP version: 5.2.9 PHP Bug Type: Feature/Change Request Bug description: upcoming apr closes descriptors by default
Description: ------------ Upcoming apr 2.0.0 (or 1.3 with backported patch) uses O_CLOEXEC for own descriptors by default. This means that when using shell_exec() the run script/binary has no stdin/stdout/stderr due to O_CLOEXEC. This also means that if any output is produced then script ends with EPIPE. Tested with apache + apr 1.3 with backported patch. http://svn.apache.org/viewvc/apr/apr/trunk/CHANGES?r1=747357&r2=748988 Reproduce code: --------------- <?php echo shell_exec("LC_ALL=C strace -o /tmp/WYNIK -f -F -s 200 ls -l /notexistingfile"); ?> Run from apache + php + apr 1.3 + backported O_CLOEXEC patch like this one http://cvs.pld-linux.org/cgi-bin/cvsweb/packages/apr/apr-bug-46425.patch?rev=1.8 Expected result: ---------------- run "ls -l" and produce some output about file not existing Actual result: -------------- 30120 lstat("/notexistingfile", 0x18f55f0) = -1 ENOENT (No such file or directory) 30120 write(2, "ls: ", 4) = -1 EBADF (Bad file descriptor) 30120 write(2, "cannot access /notexistingfile", 30) = -1 EBADF (Bad file descriptor) 30120 write(2, ": No such file or directory", 27) = -1 EBADF (Bad file descriptor) 30120 write(2, "\n", 1) = -1 EBADF (Bad file descriptor) 30120 close(1) = 0 30120 close(2) = -1 EBADF (Bad file descriptor) 30120 exit_group(2) As you can see there is no file descriptor 2 and this means that ls output is lost. Probably the best for php is to always provide own descriptors without relying on apache provided one. -- Edit bug report at http://bugs.php.net/?id=48506&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48506&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48506&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48506&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=48506&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48506&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=48506&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=48506&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=48506&r=needscript Try newer version: http://bugs.php.net/fix.php?id=48506&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=48506&r=support Expected behavior: http://bugs.php.net/fix.php?id=48506&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=48506&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=48506&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=48506&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48506&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=48506&r=dst IIS Stability: http://bugs.php.net/fix.php?id=48506&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=48506&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=48506&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=48506&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=48506&r=mysqlcfg
