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Re: Cannot exec() program outside of /bin if PATH is unset

Andrey Repin wrote:
Hmm... is postfix actually broken?
Unsetting PATH is IMO sane (from the POSIX POV) if all exec() calls use
absolute path names.
If all exec() calls are made with full paths, unsetting $PATH does not improve
security in any way,

Of course. But postfix could be configured to run "unknown" external programs through its various daemons. In this case, a fixed (here: empty) PATH improves security. If not convinced, please discuss with the author of postfix :-)

but leave underlying system in an inconsistent state.

I don't see any added inconsistencies, please explain.

This is not limited to Cygwin1.dll, but to all other system DLL's that you
might need to load.

No. The "system" (aka "Windows") DDLs are always found due to the built-in defaults which *precede* PATH:

The Cygwin "system" DLLs may be not found if PATH is modified/unset, therefore I suggested to fix this by a SetDllDirectory() call.

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