Description of problem:
The following script no longer
generates the vlf6.plt file as it used to.  The ds5 program works
properly when invoked from the shell.

<?php
     $command = "ds5 +2000 -0.25 1 2 3 4 5 6 7 8  >/u/h/vlf6.plt 
2>/dev/null";
     system($command);
     $command ="cd /u/h;  tek2gif vlf6.plt 2>/dev/null";
     system($command);
?>

Version-Release number of selected component (if applicable):


How reproducible:

run this script or something similar using redirection
Steps to Reproduce:
1.
2.
3.

Actual results:
nothing seems to happen anymore

Expected results:
programs executed, files generated/updated

Additional info: