flock() fails under Solaris

Take a look at the following code: function log_system_output($cmd,$outp,$st,$ts,$te) { global $LOG_DIR; $fp = fopen("$LOG_DIR/output.log","a"); flock($fd,2); fwrite($fp,"--------------------------------------------------------------------------------\n"); fwrite($fp,"Kommando: $cmd\n"); fwrite($fp,sprintf("Gestartet: %s Terminiert: %s Gesamtlaufzeit: %-.3lf\n", strftime("%Y-%m-%d %H:%M:%S",$ts),strftime("%Y-%m-%d %H:%M:%S",$te),$te-$ts)); fwrite($fp,"Exitcode: $st\n"); fwrite($fp,"Ausgabe: \n$outp\n"); // flock($fd,3); fclose($fp); } The execution of the function fails with the message: Warning: Supplied argument is not a valid File-Handle resource in ... When I remove the flock() call the function works as expected. Environ: Solaris 2.7,gcc-2.95-2,PHP4RC1 Andreas Jung -- _\\|//_ (' O-O ') ------------------------------ooO-(_)-Ooo-------------------------------------- Andreas Jung, Saarbrücker Zeitung Verlag und Druckerei GmbH Saarbrücker Daten-Innovations-Center Untertürkheimerstraße 15, D-66103 Saarbrücken, Germany Phone: +49-(0)681-502-1528, Fax: +49-(0)681-502-1509 Email: ajung@sz-sb.de (PGP key available) -------------------------------------------------------------------------------