#40566 [NEW]: Fgets screws up php on a nonblocked socket

From: myself at ligesh dot com Operating system: Linux PHP version: 5.2.1 PHP Bug Type: Sockets related Bug description: Fgets screws up php on a nonblocked socket Description: ------------ If i do an fgets on a socket that has been noblocked using stream_set_blocking($fp, false);, then php goes into a loop. stream_set_blocking($socket, false); fgets($socket, 1024); Instead of returning instantly at teh fgets, php goes into an internal loop. The strace is: -------------- read(4, 0x98b9180, 5) = -1 EAGAIN (Resource temporarily unavailable) Continiously repeated. -------------------- This is a very nasty bug, and i am really suprised how it got in there. It was working fine with 5.2.0, but i made a mistake of upgrading to 5.2.1 and my major program has completely broken down. Reproduce code: --------------- ---------- $fd = stream_socket_client("ssl://$serv_addr:$serv_port") stream_set_blocking($fd, false); fgets($fd, 1024); ------------- Expected result: ---------------- Return immediately. Actual result: -------------- Goes into a manic loop of read returning einval. -- Edit bug report at http://bugs.php.net/?id=40566&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=40566&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=40566&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=40566&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=40566&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=40566&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=40566&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=40566&r=needscript Try newer version: http://bugs.php.net/fix.php?id=40566&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=40566&r=support Expected behavior: http://bugs.php.net/fix.php?id=40566&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=40566&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=40566&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=40566&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40566&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=40566&r=dst IIS Stability: http://bugs.php.net/fix.php?id=40566&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=40566&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=40566&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=40566&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=40566&r=mysqlcfg