Hi. I'll make this short and sweet.
Doing ps -ef to check for some processes running on a machine. when they're running, there's no problem. When the proc ISN'T running (which is what I want to know) I'm getting nothing. Basically doing this.
use strict;
my @procs = qw|mozilla evolution|;
foreach my $process(@procs) {
open ( PROCS, "ps -ef |grep $process |grep -v grep|" ) or die "Cou
+ldn't open procs $!";
while ( my $proc = <PROCS> ) {
chomp $proc;
if ( defined( $proc ) ) {
print "looks okay here\n";
} else {
print "couldn't find $process - you're screwed\n";
}
}
}
To test this, I'll change Mozilla to Gozilla in the array assignemnt at the top. Since when it loops through, running ps, grepping for Gozilla, it'll get nothing - is that not undefined in this case?
In short, if I run the above, grepping for procs that don't exist, I get nothing in standard output.
If I'm totally off on that, can someone point me into the direction I need to go in to check for when something WON'T be there?
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