ID: 48576 Updated by: j...@php.net Reported By: yolcoyama at gmail dot com -Status: Open +Status: Bogus Bug Type: Filesystem function related Operating System: Linux ubo 2.6.28-11-generic PHP Version: 5.2.9 New Comment:
Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2009-06-23 19:42:57] sjoerd-php at linuxonly dot nl Thank you for your bug report. On my system, crontab returns 1, as shown by these commands: crontab -l -u USER; echo $? This thus means that PHP returns the correct exit status. Instead, the system() system call behaves strangely. You can show this by compiling a program which returns 1 in its main loop and call that program using system(). It will return 256 as return status. Python documents this somewhat better than the C++ system call: [It will] return a tuple containing its pid and exit status indication: a 16-bit number, whose low byte is the signal number that killed the process, and whose high byte is the exit status (if the signal number is zero); the high bit of the low byte is set if a core file was produced. ------------------------------------------------------------------------ [2009-06-17 06:35:23] yolcoyama at gmail dot com Description: ------------ Trying to install crontab with PHP cli, system (and passthru) function returned error-code of "1" with output "no crontab for USER" (USER should be replaced with real system user to whom crontab should be installed). the code is: $ php -r '$c="crontab -u USER -l";system($c,$status); printf("%s (%d)\n",$c,$status);' the output is: no crontab for USER crontab -u USER -l (1) Since no crontab is been installed for the USER, the output was expected, but I don't think error code should be 1 for this. For comparison, python and c++ both returns 256 of error code for this error ("no crontab for USER be installed"). According to an error code definition of unix system (in ubuntu, /usr/include/asm-generic/errno-base.h and errno.h), 1 be translated as "permission denied". Followings are comparison code and result for other languages. They returned error number 256 but PHP. * c++ #include <iostream> #include <cstdlib> using namespace std; int main(int argc,char *argv[]){ string cmnd("crontab -u USER -l"); int errcode=system(cmnd.data()); printf( "%s (%d)\n", cmnd.data(), errcode ); return 0; } r...@server2:~/diary# ./a.out no crontab for USER crontab -u USER -l (256) * python r...@server2:~/diary# python -c 'import os; c="crontab -u USER -l"; print "%s (%d)" % (c, os.system(c))' no crontab for USER crontab -u USER -l (256) * php r...@server2:~/diary# php -r '$c="crontab -u USER -l";system($c,$status); printf("%s (%d)\n",$c,$status);' no crontab for USER crontab -u USER -l (1) * error number refference r...@server2:~/diary# awk '/[\x20\t]+1[\x20\t]+/' /usr/include/asm-generic/errno-base.h #define EPERM 1 // Operation not permitted Reproduce code: --------------- # make sure there's NO crontab installed for USER. $ php -r '$c="crontab -u USER -l";system($c,$status); printf("%s (%d)\n",$c,$status);' Expected result: ---------------- Output: no crontab for USER crontab -u USER -l (256) Actual result: -------------- Output: no crontab for USER crontab -u USER -l (1) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=48576&edit=1
