Problem with exec and LD_LIBRARY_PATH

From: Noah (noah_at_noah.org)
Date: 04/30/04 

Date: 30 Apr 2004 11:26:56 -0700

Is there a way to get PHP to define LD_LIBRARY_PATH when using
exec to start an external program?

I wrote an xml validation utility in C++ that links to the Xerces C library.
I linked with the -rpath option, so that I should not have to
manually set the LD_LIBRARY_PATH to find the Xerces shared object.
This works fine from the command line. I can run my tool and it finds
the library without having LD_LIBRARY_PATH set.
(If -rpath is not used when linking an ELF executable,
the contents of the environment variable "LD_RUN_PATH"
will be used if it is defined.)

But when I try to run the tool through PHP using exec()
I get this error:
    xml_validate: error while loading shared libraries:
    libxerces-c.so.25: cannot open shared object file:
    No such file or directory
This is the error I would get from the command line if I
didn't use the -rpath linker option and had not set LD_LIBRARY_PATH.
Does PHP do something that bypasses the run time linker options?
If so then I assume this is for safety, but checking my safe_mode options
I find this:
    safe_mode: Off
    safe_mode_exec_dir: no value
    safe_mode_gid: Off
    safe_mode_include_dir: no value

Is there a way to get PHP to define LD_LIBRARY_PATH when using
exec to start an external program?

I'm using PHP 4.3.5.

Any help or advice is appreciated.

Yours,
Noah

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