[PHP-DEV] PHP 4.0 Bug #6104: popen returns -1 From: Alan <email protected>
Date: 08/11/00

From: Alan <email protected>
Operating system: Solaris 8
PHP version: 4.0.1pl2
PHP Bug Type: Misbehaving function
Bug description: popen returns -1

This code snippit from horde.lib (www.horde.org):
                                                                                
 // Finally, send the mail.
        if ( <email protected>($default->path_to_sendmail)) {
                $mail = popen("$default->path_to_sendmail -i -f$from -- $recipients", 'w');
                $result = fputs($mail, $bhdrs . $hdrs);
                echo "1: " . $result;
                $result += fputs($mail, "\n"); // trailing \n to end the
headers section
                echo "2: " . $result;
                $result += fputs($mail, $body);
                echo "3: " . $result;
                if (pclose($mail) != 0)
                        $result = 0;
          echo "4: " . $result;
        } else {
                if (empty($envelope['To'])) $envelope['To'] = '';
                if (empty($envelope['Subject'])) $envelope['Subject'] = '';
                if (mail($envelope['To'], $envelope['Subject'], $body, $hdrs .
 $mhdrs))
                        $result = 1;
                else
                        $result = 0;
        }
                                                                                
Yields the following output:
1: 345
2: 346
3: 354
4: 0
                                                                                
The return value of pclose() is not the exit status of the program, but a value as returned by waitpid() of wait4(). I've run what the popen command-line calls by hand using truss, and sendmail is returning exit(0). So, I dug a bit further... pclose($mail) is returning -1. Any ideas on how I can track down why? This function is not reported to be misbehaving on other platforms. 

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