#33909 [Asn->Fbk]: fread of a pipe hang after opening a pipe with a < entry

ID: 33909 Updated by: wez@php.net Reported By: phil at adigital dot com dot mx -Status: Assigned +Status: Feedback Bug Type: Filesystem function related Operating System: * PHP Version: 5CVS-2005-07-29 Assigned To: wez New Comment: Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If possible, make the script source available online and provide an URL to it here. Try to avoid embedding huge scripts into the report. Previous Comments: ------------------------------------------------------------------------ [2005-07-29 02:05:50] sniper@php.net Yet another streams issue. ------------------------------------------------------------------------ [2005-07-28 19:25:14] phil at adigital dot com dot mx I just tried both snapshots on windows and linux, same problem happens - Phil ------------------------------------------------------------------------ [2005-07-28 19:03:25] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip ------------------------------------------------------------------------ [2005-07-28 18:55:33] phil at adigital dot com dot mx Description: ------------ Opening a pipe for read , for example for a cgi (in this example) will block on the fread AFTER a call to a call with an entry file I got the error on Windows, Linux, from PHP 5.0.2, PHP 5.0.4, PHP5.1 on CVS (did not try on other versions either) For example: Call 1: popen("/usr/bin/php5"); with SCRIPT_FILENAME=info.php WORKS perfectly, and is repeatible X times Call 2: popen("/usr/bin/php5"); with SCRIPT_FILENAME=info.php<tempfile WORKS perfectly... BUT Call 3: after the call 2 popen("/usr/bin/php5"); with SCRIPT_FILENAME=info.php WILL HANG AND TOTALLY BLOCK but without using CPU time. compile: compiled downloaded version on windows, natural php.ini without modifications On linux: compiled as CLI, CGI, no more options than mysql The bug do not depends on what is compiled with php Thx Reproduce code: --------------- For linux code example : http://www.thomassigny.org/bugpipe/linux/ For windows code example : http://www.thomassigny.org/bugpipe/windows/ Expected result: ---------------- i expect the code does not hang... Actual result: -------------- no backtrace, the running code hang ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=33909&edit=1