#25727 [Opn]: popen returns wrong exitcode

ID: 25727 Updated by: sniper@php.net Reported By: eru@php.net Status: Open Bug Type: Filesystem function related Operating System: i386 Linux PHP Version: 4CVS-2003-10-02 (stable) New Comment: For me the output is (when replaced fread with fgets) this: FOO int(0) Previous Comments: ------------------------------------------------------------------------ [2003-10-02 09:12:04] eru@php.net I always questions "suggestions" given without explanation and I will continue to do so in the future. Now that you've given me one I can assure you that the outcome is just the same. Please note, that I tested this snippet on at least 4 different systems with different accounts and got the behaviours described in expected/actual result. ------------------------------------------------------------------------ [2003-10-02 09:00:17] wez@php.net If you pclose before all the data has been read, you might cause the child process to terminate abnormally, and this might explain the exit code. In addition, fread() will only read a "packet" from a pipe, so you might not be getting all the data before you pclose it. *that's* what fread/fgets() has got to do with it; in future, please don't question my suggestions and just provide the requested feedback. ------------------------------------------------------------------------ [2003-10-02 08:38:42] eru@php.net What has the fread/fgets to do with the problem? I'm talking about the exitcode here. The fread-line is just a demonstration, that the command is carried out correctly. ------------------------------------------------------------------------ [2003-10-02 08:20:43] wez@php.net Try using fgets() ------------------------------------------------------------------------ [2003-10-02 08:00:43] eru@php.net Description: ------------ Apparently this has something to do with the environment-variables in the shell, popen uses to execute the command. If I replace "echo FOO" with "export" I get the whole line of variables and then it fails, whereas the successful execution only has one, BASH=/bin/sh. I use php -n so no php.ini is used. Reproduce code: --------------- <?php $pp = popen("echo FOO", "r"); echo fread($pp, 4096); var_dump(pclose($pp)); ?> Expected result: ---------------- FOO int(0) Actual result: -------------- FOO int(-1) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=25727&edit=1