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Using command lines

Posted on 1998-10-07
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Last Modified: 2010-03-05
I want to get the uptime by using the command line :

set `cat /proc/uptime`

and then using the variables $1 and $2

How do I do this in perl??
Writing set `cat /proc/uptime`, gives my a syntax error!!!

How do I use command lines like this???
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Question by:lar_jens
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Accepted Solution

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b2pi earned 70 total points
ID: 1205177
using /proc/uptime is rather linux (and a few others) specific.  Since
I don't have a linux box here, and don't offhand know the format here,
the following sample code should do the trick for you.  If not, let me
know.

$a = `cat /proc/uptime`;
$a =~ s/^\s+|\s+$//g;
print "$a\n";
 
@z = split(/\s+/,$a);
for ($i = 0; $i <= $#z; $i++) {
   print "$i\t\"$z[$i]\"\n";
}
 


## Interestingly enough, I'd be willing to be you could do something
## similar by doing:

open(UPTIME, '</proc/uptime');
$a = <UPTIME>;
close(UPTIME);
$a =~ s/^\s+|\s+$//g;
print "$a\n";
 
@z = split(/\s+/,$a);
for ($i = 0; $i <= $#z; $i++) {
   print "$i\t\"$z[$i]\"\n";
}
 

## which is a tad bit more efficient.
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by:lar_jens
ID: 1205178
Adjusted points to 75
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LVL 1

Author Comment

by:lar_jens
ID: 1205179
oki... thx!
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