From: poehler at interworx dot com Operating system: CentOS 5.4 PHP version: 5.2.13 PHP Bug Type: *General Issues Bug description: Exec family of functions runs a script piped into 'head' too until script end
Description: ------------ See reproduce code and expected / actual result sections for details. Short story is when exec'ing with a pipe to 'head', we're getting unexpected results. I'm aware this may be 'correct' behavior, by some definition, but for the life of me I can't figure out where this behavior is documented, if that is the case. So if that is the case, please point me in the right direction, if you could be so kind. Reproduce code: --------------- test.sh: ================= #!/bin/sh for i in 1 2 3 4 5 do echo "Welcome $i times" sleep 1 done ================== test.php: ================== <? passthru( '/bin/sh test.sh | head -n1' ); ================== Expected result: ---------------- Here is the output of running the same command at the shell, which is correct. ================== [r...@me]# time /bin/sh test.sh | head -n1 Welcome 1 times real 0m1.030s user 0m0.002s sys 0m0.027s ================== And I would expect identical (save minor timing differences) when test.php is run. Actual result: -------------- [r...@me]# php test.php Welcome 1 times test.sh: line 5: echo: write error: Broken pipe test.sh: line 5: echo: write error: Broken pipe test.sh: line 5: echo: write error: Broken pipe test.sh: line 5: echo: write error: Broken pipe real 0m5.191s user 0m0.002s sys 0m0.038s Note that this took 5 seconds instead of 1. -- Edit bug report at http://bugs.php.net/?id=51160&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=51160&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=51160&r=trysnapshot53 Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=51160&r=trysnapshot60 Fixed in SVN: http://bugs.php.net/fix.php?id=51160&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51160&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=51160&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=51160&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=51160&r=needscript Try newer version: http://bugs.php.net/fix.php?id=51160&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=51160&r=support Expected behavior: http://bugs.php.net/fix.php?id=51160&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=51160&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=51160&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=51160&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51160&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=51160&r=dst IIS Stability: http://bugs.php.net/fix.php?id=51160&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=51160&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=51160&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=51160&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=51160&r=mysqlcfg
