#30784 [NEW]: is_writable fails with apache user/group set

From: max at warped dot org Operating system: Linux - Redhat ES3 PHP version: 4.3.9 PHP Bug Type: Filesystem function related Bug description: is_writable fails with apache user/group set Description: ------------ is_writable() only returns one for files that are writable by the apache user, not by the current UID. Apache is running as user/group nobody, but is setup with virtual hosts. Each virtual host uses its own user/group. The current UID as returned by getmyuid() verifies that my PHP scripts are running as "me" and not as "nobody". test_file is permission 0644. If I chmod test_file to user "me" is_writable() returns nothing. If I chmod test_file to user "nobody" is_writable() returns 1. PHP needs to check the current uid an use that to verify if something is writable, or it needs to defer to the operating system. I imagine this is mod_php specific. Reproduce code: --------------- httpd.conf : User nobody Group nobody <VirtualHost ...> User me Group me </VirtualHost> $ touch test_file $ chmod 0644 test_file $ chown nobody test_file <? print getmyuid() ?> <? print is_writable('test_file') ?> 514 1 $ chown me test_file <? print getmyuid() ?> <? print is_writable('test_file') ?> 514 (nothing) Expected result: ---------------- I expect is_writable() to return 1 if PHP fully has permission to write the file. As a result, I have to chmod sensitive data to 0666 on a shared server, which is bad. -- Edit bug report at http://bugs.php.net/?id=30784&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=30784&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=30784&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=30784&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=30784&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=30784&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=30784&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=30784&r=needscript Try newer version: http://bugs.php.net/fix.php?id=30784&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=30784&r=support Expected behavior: http://bugs.php.net/fix.php?id=30784&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=30784&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=30784&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=30784&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=30784&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=30784&r=dst IIS Stability: http://bugs.php.net/fix.php?id=30784&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=30784&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=30784&r=float MySQL Configuration Error: http://bugs.php.net/fix.php?id=30784&r=mysqlcfg