From: onlineviewer <[EMAIL PROTECTED]> > On Jul 1, 9:02 pm, [EMAIL PROTECTED] (Jenda Krynicky) wrote: > > From: onlineviewer <[EMAIL PROTECTED]> > > > 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). " > > thanks, for the info, although im not really sure how to implement > this into my code. > can you show me how that would be inserted ?
Change system "tcpdump -i bge1 -s0 -w /tmp/file.out -C 1"; to system 1, "tcpdump -i bge1 -s0 -w /tmp/file.out -C 1"; 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/
