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Message-ID: <54403DCD.7090107@t-online.de>
Date: Thu, 16 Oct 2014 23:51:09 +0200
From: Christian Franke <Christian.Franke@t-online.de>
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To: cygwin@cygwin.com
Subject: Re: Cannot exec() program outside of /bin if PATH is unset
References: <20141009100317.GI29235@calimero.vinschen.de> <54369ADE.7060201@redhat.com> <20141009162906.GA25389@calimero.vinschen.de> <571726.85545.bm@smtp112.sbc.mail.ne1.yahoo.com> <20141010103446.GJ2681@calimero.vinschen.de> <CAO1jNwt5UyB9CDKJdotXUND--mg1sY-5Fu+-ZHf2atM5_=HArA@mail.gmail.com> <CAMCbSMrar1Zu4p6gN=gc8-XqE-8RUTmP3er0ujeN--CHKzCNAQ@mail.gmail.com> <816144.8551.bm@smtp119.sbc.mail.ne1.yahoo.com> <CAMCbSMpWKbSVhVu85_02fN3sgWXiFBkUzjOOAJ6+Jxot8X6E=Q@mail.gmail.com> <20141010153925.GL2681@calimero.vinschen.de> <20141014193045.GF2681@calimero.vinschen.de>
In-Reply-To: <20141014193045.GF2681@calimero.vinschen.de>
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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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