Re^13: show a message only during the sleep time

No. You're confusing backquotes with system again.

If you want to launch the program as a child process:

system "/usr/local/www/cgi-bin/ntop/ntop.sh", "stop" and die "... ";
[download]

If you want to capture the output of the ntop command:

my $output = `/usr/local ...`;
[download]

Don't take the output of ntop, and feed it back to system!

-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.

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Re^14: show a message only during the sleep time by cc (Beadle) on Jul 25, 2005 at 22:09 UTC
thanks, I changed to: my $stop = `/usr/local/bin/sudo /usr/local/www/cgi-bin/ntop/ntop.sh st +op` or die "cannot stop ntop: $!"; [download]	[reply] [d/l]
Re^15: show a message only during the sleep time by merlyn (Sage) on Jul 25, 2005 at 22:13 UTC
So, that lives if "ntop.sh" says something, and dies otherwise. I can't tell if that's what you want, since you haven't yet given me any information. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
Re^16: show a message only during the sleep time by cc (Beadle) on Jul 25, 2005 at 23:41 UTC
or has someone any other idea ?	[reply]
Re^17: show a message only during the sleep time by merlyn (Sage) on Jul 26, 2005 at 00:15 UTC
Re^18: show a message only during the sleep time by cc (Beadle) on Jan 24, 2006 at 23:30 UTC
Re^18: show a message only during the sleep time by cc (Beadle) on Jul 26, 2005 at 23:11 UTC
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Re^16: show a message only during the sleep time by cc (Beadle) on Jul 25, 2005 at 22:51 UTC
this script should stop the ntop and start it again after 8 seconds. I did some tests and ntop will be stopped with: my $stop = `/usr/local/bin/sudo /usr/local/www/cgi-bin/ntop/ntop.sh st +op` or die "cannot stop ntop: $!"; [download] and started again with: <br> my $start = `/usr/local/bin/sudo /usr/local/www/cgi-bin/ntop/ntop.sh s +tart` or die "cannot start ntop: $!"; [download] I cannot see errors on the ntop output. I have only one problem if the ntop is already running, an I start the script, I don't get any errors, but if it was stopped before, then I get an error: `Software error: cannot stop ntop: at /usr/local/www/cgi-bin/ntop/ntop.cgi line 41.` [download] it needs to check first if the ntop is already running and then stop it.	[reply] [d/l] [select]