Dear all,

I dont get this problem if I run the software locally, but it crashes with a segmentation fault if I try to run it via CGI.

Basically i have a XML-RPC cgi file set-up, and when the method inside is called, it runs the main external perl script.

This perl script, amongst other things, uses two external C programs to do some work...

here's the two lines that uses the two programs: 
qx "$msms $coords1 $coords2 $$Vertex_Density >$mslog 2>&1";
qx "$hbplus $pdbfile >$hblog 2>&1";

[download]

the first program runs without a hitch, the second program is the one that crashes, EVEN though the main perl script runs ok locally.

I've pinpointed two possible areas of fault:

  1. the second program is designed so that it's output occurs in the directory it is run from, thus there is a chdir $path command before it. This chdir works, but does the change in dir crash the program?
  2. the first program is run from a fork deliberately created by perl, because it is run twice, in parallel. there is no deliberate fork for the second as it runs once on it's own. should this be the case?
thanks
Sam Seaver

ps there is no output, just "Segmentation Fault"; pps all uids are go. I hope.

20030516 Edit by Corion Removed PRE tags, added formatting

In reply to External C ran from External Perl ran from CGI by seaver

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