From:
Operating system: Platform agnostic
PHP version: 5.3.8
Package: *General Issues
Bug Type: Bug
Bug description:When a script exits due to write/flush failure, php cli still
returns 0
Description:
------------
Here is the scenario that causes the issue:
In php.ini, ignore_user_abort=0
Have a PHP script that writes to standard out using 'echo'. The php script
is
launched by a shell script that redirects standard out to a file. If the
partition/disk that receives the standard out file fills up while the
script is
running, eventually the 'echo' will cause the script to bail out because
PHP was
unable to write to the output stream due to the disk being full. However,
the
php process will exit with error code 0 even though the script never
completed.
The root cause is in main.c php_execute_script. If an error occurs and
zend_execute_scripts returns via longjmp, both retval and EG(exit_status)
will
still both be 0. This makes it difficult to ascertain whether or not your
script ran successfully.
The obvious fix seems to be to add a zend_catch block that would set retval
and
EG(exit_status) to FAILURE, but I am unsure if that would have any unwanted
impact. This fix doesn't make the situation any easier to debug, but it at
least allows php to exit with a proper error code.
Test script:
---------------
<?php
$logfile = $argv[1];
function doLog($msg)
{
global $logfile;
$datestr = date("Y-M-d H:i:s T",time());
$msg="[".$datestr."]". $msg . "\n";
file_put_contents($logfile, $msg, FILE_APPEND);
}
doLog("Starting test");
$i = 0;
while(true)
{
echo "Echoing a string to standard out!!!\n";
if((++$i % 10) == 0)
{
doLog("Completed $i iterations");
}
}
doLog("Script exited normally");
return 0;
?>
Expected result:
----------------
Expect the script to either run to completion or that PHP would exit with
an error
Actual result:
--------------
In the case of the above script, the script bails out without running to
completion, but an error code of 0 is returned to the parent process.
--
Edit bug report at https://bugs.php.net/bug.php?id=60505&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=60505&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=60505&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=60505&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=60505&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=60505&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=60505&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=60505&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=60505&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=60505&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=60505&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=60505&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=60505&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=60505&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=60505&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=60505&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=60505&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=60505&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=60505&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=60505&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=60505&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=60505&r=mysqlcfg
