To: beginners@perl.org From: onlineviewer <[EMAIL PROTECTED]> Subject: kill process when file number reached... Date sent: Tue, 1 Jul 2008 11:26:42 -0700 (PDT) Organization: http://groups.google.com
> Hello All, > > I am trying to run a tcpdump and have perl kill the tcpdump once 10 > files have been created by the tcpdump. Here is my code, not sure...if > my logic is screwy > Thanks, > > system "tcpdump -i bge1 -s0 -w /tmp/file.out -C 1"; > sleep 2; The system() doesn't return until the tcpdump exits. You probably want to fork() and exec() instead. Or use system 1, "tcpdump -i bge1 -s0 -w /tmp/file.out -C 1"; "system(1, @args) spawns an external process and immediately returns its process designator, without waiting for it to terminate. Return value may be used subsequently in wait or waitpid. Failure to spawn() a subprocess is indicated by setting $? to "255 << 8". $? is set in a way compatible with Unix (i.e. the exitstatus of the subprocess is obtained by "$? >> 8", as described in the documentation). " HTH, Jenda ===== [EMAIL PROTECTED] === http://Jenda.Krynicky.cz ===== When it comes to wine, women and song, wizards are allowed to get drunk and croon as much as they like. -- Terry Pratchett in Sourcery -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
