Bug #63731 [Nab]: shell_exec() cannot run some commands
Edit report at https://bugs.php.net/bug.php?id=63731&edit=1
ID: 63731
User updated by: scott at smashcat dot org
Reported by: scott at smashcat dot org
Summary: shell_exec() cannot run some commands
Status: Not a bug
Type: Bug
Package: *General Issues
Operating System: Linux
PHP Version: 5.4.9
Block user comment: N
Private report: N
New Comment:
Yep, was totally user error - output from $zip=which zip adds a linefeed which was not
being trimmed, so the command was sending zip to stdout. My bad! Removing...
Previous Comments:
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[2012-12-08 23:43:47] rasmus@php.net
Sorry, this has nothing to do with PHP. All PHP does is call popen() here which
creates a pipe and forks a shell to run the command. To debug it try switching to
your web server user id from the command line and trying it and if you are really
stuck write a little popen() wrapper in C and try to figure out where it is
failing. My guess is that it is a permissions issue.
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[2012-12-08 23:37:17] scott at smashcat dot org
Description:
------------
When attempting to call the zip command from php, it silently fails. Other commands to create and
delete files etc work fine. Using correct path to zip etc. No errors, just fails. Running same
command from terminal works.
Test script:
---------------
$zip=which zip;
$res=shell_exec("$zip test.zip test.txt");
Expected result:
----------------
zip file should be created
Actual result:
--------------
Nothing. No errors, although the response variable $res contains what appears to be part of the zip
file data. Seems like the output from zip is not going to the file, but being sent to the virtual
terminal.
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Edit this bug report at https://bugs.php.net/bug.php?id=63731&edit=1
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