From:             php dot chad at cropcirclesystems dot net
Operating system: FreeBSD 5.1-p11
PHP version:      4.3.4
PHP Bug Type:     CGI related
Bug description:  with CGI, shell_exec()/backtick operator never returns

Description:
------------
Using the Apache module or the CLI, everything works 
just fine.
However, when using PHP via CGI, the backticks operator 
and the shell_exec() function both never return, 
however, they DO successfully execute the command! php 
blocks idle, not racing.

Seems similar to #11224 in effect, but #11224 claims it 
was fixed in 4.0.6! Also, #11224 is on Windows using 
IIS! (yuck!)

I've built PHP 4.3.4 via FreeBSD's port system, so it 
could be their problem. I have yet to test this with 
another operating system. My php.ini is your php.ini-
recommended. My configure line is rather large, but can 
be 
seen at 'http://www.cropcirclesystems.net/phpinfo.php', 
although I have many optional modules, I've also tried 
this with FreeBSD's port's default module selections. I 
built using: cd /usr/ports/lang/php4; make 
WITHOUT_CLI=yes WITHOUT_APACHE=yes install; cp /usr/
local/etc/php.ini-recommended /usr/local/etc/php.ini

Reproduce code:
---------------
<?php
print shell_exec('/full/path/to/some/executable');
?>

Expected result:
----------------
the stdout of the executable

Actual result:
--------------
indefinate waiting. The executable gets executed, 
though.

I'd be happy to follow up with more testing/information. 
I'll let you know after I try the same thing on FreeBSD 
4.9 and Gentoo Linux.

-- 
Edit bug report at http://bugs.php.net/?id=26786&edit=1
-- 
Try a CVS snapshot (php4):  http://bugs.php.net/fix.php?id=26786&r=trysnapshot4
Try a CVS snapshot (php5):  http://bugs.php.net/fix.php?id=26786&r=trysnapshot5
Fixed in CVS:               http://bugs.php.net/fix.php?id=26786&r=fixedcvs
Fixed in release:           http://bugs.php.net/fix.php?id=26786&r=alreadyfixed
Need backtrace:             http://bugs.php.net/fix.php?id=26786&r=needtrace
Need Reproduce Script:      http://bugs.php.net/fix.php?id=26786&r=needscript
Try newer version:          http://bugs.php.net/fix.php?id=26786&r=oldversion
Not developer issue:        http://bugs.php.net/fix.php?id=26786&r=support
Expected behavior:          http://bugs.php.net/fix.php?id=26786&r=notwrong
Not enough info:            http://bugs.php.net/fix.php?id=26786&r=notenoughinfo
Submitted twice:            http://bugs.php.net/fix.php?id=26786&r=submittedtwice
register_globals:           http://bugs.php.net/fix.php?id=26786&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=26786&r=php3
Daylight Savings:           http://bugs.php.net/fix.php?id=26786&r=dst
IIS Stability:              http://bugs.php.net/fix.php?id=26786&r=isapi
Install GNU Sed:            http://bugs.php.net/fix.php?id=26786&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=26786&r=float

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