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

[Christian Franke]

Corinna Vinschen wrote:
> ...
> I implemented this in the latest snapshot.  It calls SetDllDirectory
> on Cygwin's /bin, and dlopen addiotnally tries to load the DLL with
> LoadLibraryEx(LOAD_WITH_ALTERED_SEARCH_PATH) if all else failed.

For some reason, the SetDllDirectory() call has no effect for exec():

Testcase:

$ unset PATH

$ uname -srvm
-bash: uname: No such file or directory

$ /bin/uname -srvm
CYGWIN_NT-6.1-WOW64 1.7.33s(0.277/5/3) 20141014 19:44:03 i686

$ /usr/sbin/alternatives
/usr/sbin/alternatives: error while loading shared libraries: ?: cannot 
open shared object file: No such file or directory

$ PATH=/bin /usr/sbin/alternatives
alternatives version 1.3.30c - ...

$ cd /bin

$ /usr/sbin/alternatives
alternatives version 1.3.30c - ...



> Please give the latest snapshot from https://cygwin.com/snapshots/
> a try.

No regressions found yet :-)

Christian


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