Hi all,

My first post here - hope somebody can help. I'm on Linux - Slackware 12.2 32 bit and Slackware 13.0 64 bit. Both using Perl 5.10.0 as distributed by Slackware. I have 4Gb RAM.

My actual script creates two large arrays, writes some files and then runs a system command to execute PovRay raytracer. It works fine on Slackware 12.2 32 bit but fails on Slackware 13.0 64 bit. The problem is that on Slackware 13.0 64 bit the system command fails to execute. It fails silently and the return code is 0.

I have created a small demo script, see below, which shows the fault using system("date"); It is 100% repeatable on my system. You can see that the second system("date"); command fails to execute on 64 bit.

Anybody able to duplicate this problem? And more important - any solution?

Cheers, Peter 

#!/usr/bin/perl

system("date");
if ( $? == -1 ) { print "Level 0 command failed: $!\n"; }
  else { print "Level 0 command exited with value ",($? >> 8),"\n"; }

for ($i = 1; $i <= 5760; $i++) {
  for ($j = 1; $j <= 2880; $j++) {
    $array1[$i][$j] = "<1234567890,1234567890,1234567890>";
    $array2[$i][$j] = "<1234567890,1234567890,1234567890>";
  }
}

system("date");
if ( $? == -1 ) { print "Level 0 command failed: $!\n"; }
  else { print "Level 0 command exited with value ",($? >> 8),"\n"; }

print "End\n";

exit;

[download]

Bad output from Slackware 13.0 64 bit: 

Tue Feb 16 23:09:22 GMT 2010
Level 0 command exited with value 0
Level 0 command exited with value 0
End

[download]

Good output from Slackware 12.2 32 bit: 

Tue Feb 16 23:13:52 GMT 2010
Level 0 command exited with value 0
Tue Feb 16 23:14:13 GMT 2010
Level 0 command exited with value 0
End

[download]

In reply to system command - OK on 32 bit, fails on 64 bit Linux - why? by geep999

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