OK, different problem now. When you say 'it does not work' when used in backticks, is the file created in the wrong directory, or does it fail to read the input?
It could be that the chdir is affecting the redirection. This will be done by the bourne shell. Try providing the full path name of the input file with your redirection.
Failing that, you could try:
`cd $target;../../progs/<script> < <param input file>`

[download]
You are invoking a shell anyway (because of the redirection) so adding a cd won't be any more of an overhead.
If you still have problems then we could run it in a pipe, which is much neater.

In reply to Re^3: running process from CGI by cdarke
in thread running process from CGI by kota_rocks

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