On Tue, Mar 12, 2002 at 02:43:14PM +0800, a wrote: > i use popen to run a command and read output from the command, > but the command outputs error message to something else than std out. > > how can i read the error message? Another homework question? Please don't. There's plenty of documentation installed on any reasonable Unix system which should help you figure it out. -- Colin Watson [cjwatson@flatline.org.uk]