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Perl: the Markov chain saw

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system() doesn't return the output, just the exit status. There are other ways of executing programs that will give you the exit status. For instance, use open() with a pipe:

open(EXEC, '-|', 'ps', '-deaf | ', 'grep', 'httpd |', 'grep', '-v', 'grep |', 'wc', '-l') or die "Can't exec: $!\n"; # Now read the output just like a file while(my $line = <EXEC>) { chomp $line; print "$line\n"; } close(EXEC);

Backticks and qx// also work:

my $input = `ps -deaf | grep httpd | grep -v grep | wc -l`; my $input2 = qx/ps -deaf | grep httpd | grep -v grep | wc -l/; # Same +thing

Reinvent a rounder wheel.

Note: All code is untested, unless otherwise stated

In reply to Re: Capturing System Output by hardburn
in thread Capturing System Output by Anonymous Monk

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