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[2002-05-30 21:19 UTC] kims at contrail dot com dot au
proc_close() seems to always return -1, instead of the exit value of the process it closed. I feel that this a bug in proc_close(). If proc_close() is returning -1 because of some sort of error or problem, then the online manual (http://www.php.net/proc_close) needs to specify what conditions make proc_close return -1. Here's a script that reproduces the problem. Thanks :) <? /* costants to use with the $pipes array */ define(BASH_STDIN, 0); define(BASH_STDOUT, 1); /* a random exit code, just to keep things interesting */ $bashexit = rand(100, 199); /* a shell script to write to bash's STDIN */ $shellscript .= " echo I am bash, and I will return an exit code of $bashexit exit $bashexit "; /* run bash, with pipes to/from stdin and stdout */ $bash = proc_open( "bash", array( 0 => array("pipe", "r"), 1 => array("pipe", "w"), 2 => array("file", "/tmp/bashstderr", "a") ), $pipes ); /* write the prepared shell script to bash's STDIN */ fwrite($pipes[BASH_STDIN], $shellscript); /* close pipe to bash's STDIN */ fclose($pipes[BASH_STDIN]); echo "bash's stdout:\n"; /* read and echo output from bash, one byte at a time */ while(!feof($pipes[BASH_STDOUT])) echo fread($pipes[BASH_STDOUT], 1); /* close pipe from bash's STDOUT */ fclose($pipes[BASH_STDOUT]); echo "\n"; $realexit = proc_close($bash); echo "bash's exit code: $realexit\n\n"; if ($realexit != $bashexit) echo "process exit code was $bashexit proc_close() returned $realexit!\n"; ?> PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Do you think this could do it? Index: ext/standard/exec.c =================================================================== RCS file: /repository/php4/ext/standard/exec.c,v retrieving revision 1.77 diff -u -r1.77 exec.c --- ext/standard/exec.c 8 Jul 2002 12:52:22 -0000 1.77 +++ ext/standard/exec.c 1 Aug 2002 15:47:29 -0000 @@ -567,7 +567,7 @@ do { wait_pid = waitpid(child, &wstatus, 0); - } while (wait_pid == -1 && errno = EINTR); + } while (wait_pid == -1 && errno == EINTR); if (wait_pid == -1) FG(pclose_ret) = -1;With the renewed interest in this bug, here's a patch I posted to php-dev some time ago. You need the other code in this patch so as to actually return the *correct* exit value, which I don't think the other patch will neccesarily do (although it won't return -1). ? proc_close_patch Index: ext/standard/exec.c =================================================================== RCS file: /repository/php4/ext/standard/exec.c,v retrieving revision 1.76 diff -u -r1.76 exec.c --- ext/standard/exec.c 23 May 2002 10:17:07 -0000 1.76 +++ ext/standard/exec.c 13 Jun 2002 00:03:21 -0000 @@ -559,23 +559,33 @@ GetExitCodeProcess(child, &wstatus); FG(pclose_ret) = wstatus; #else -# if HAVE_SYS_WAIT +#if HAVE_SYS_WAIT_H int wstatus; pid_t child, wait_pid; child = (pid_t)rsrc->ptr; do { + /* fetch status of child process */ wait_pid = waitpid(child, &wstatus, 0); - } while (wait_pid == -1 && errno = EINTR); + + /* if wait_pid == 1 and errno == EINTR, then waitpid() is just + * alerting of a signal that's been caught - so keep looping + * until wait_pid != -1 (the child process has exited) or + * errno != EINTR (there was a real error, not just a caught + * signal) + */ + } while (wait_pid == -1 && errno == EINTR); - if (wait_pid == -1) - FG(pclose_ret) = -1; - else - FG(pclose_ret) = wstatus; -# else + /* if the child process exited normally, set pclose_ret to the exit + * status of the child process, otherwise set it to -1 (this might + * happen if there's no child process, or it didn't exit normally) + */ + FG(pclose_ret) = wait_pid > 0 && WIFEXITED(wstatus) ? + WEXITSTATUS(wstatus) : -1; +#else FG(pclose_ret) = -1; -# endif +#endif #endif }