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From: Slawek Zak <zaks@prioris.mini.pw.edu.pl>
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Subject: Re: metapost not invoked? mpgraph.1 not created
Date: 15 Mar 2001 12:10:12 +0100
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Hans Hagen <pragma@wxs.nl> writes:

> Hi, 
>  
> >Again, I missed Hans' original query, so I don't know if this
> >is relevant.
> 
> It may be relevenat. I hope that the three of you can sort it out, so that
> the solution can go into the faq. 

I don't know whether this is not the same problem I've had. When you
uncompress the context archive it doesn't have the +x bits which make
the scripts being executable.

In texexec 2.5 you have:

sub RunPerlScript
  { my ($ScriptName, $Options) = @_ ;
    if ($dosish)
      { if (-e "$TeXScriptsPath$ScriptName.pl")
          { system ("perl $TeXScriptsPath$ScriptName.pl $Options") } }
    else
      { system ("$ScriptName $Options") } }

Which makes perl try to run the script on UNIX systems without
checking if it's executable (texutil was -x in my case) and, which is
more problematic, doesn't check for possible execution errors. I've
proposed some time ago to change the call to something like:

  ...
  if (! -x $ScriptName) {
        die("Nonexecutable script, fix the permisions for $ScriptName\n");
  } else {
         system ("$ScriptName $Options") or die $!;
  }
  ...

What do you think?

/S