On 02/26/2012 03:14 PM, Peter Rosin wrote: > Sorry for the late reply, but this might be relevant. Personally, I wouldn't > classify the below as a working "test -x", but I'm not sure what working is in > this context... Thanks for chiming in. I still haven't pushed my proposed patches to autoconf, and I'd like to make sure that what I'm proposing for autoconf still gets by on your MSYS system (I don't have MSYS set up myself, so getting feedback from you would be fastest). I assume that some of MSYS behavior on FAT is similar to cygwin on FAT, and I have been testing Cygwin on FAT, but I also know that Cygwin and MSYS have diverged so that is not necessarily a reliable result. > $ uname -a > MINGW32_NT-6.1 PEDA-PC 1.0.17(0.48/3/2) 2011-04-24 23:39 i686 Msys > $ touch gurka > $ test -x gurka > $ echo $? > 1 This says an empty file is not executable. Fine - there's no #! in the file, and MSYS tends to store files on FAT filesystems that can't track real permissions, anyway, so faking things based on contents is not an issue. What does './gurka; echo $?' do in this situation? > $ chmod +x gurka > $ test -x gurka > $ echo $? > 1 You didn't show $? nor 'ls -l' after 'chmod +x', but your transcript implies that since the filesystem can't record executable bits, that chmod is silently ignored, and the faking of executability is still being done. > $ touch gurka.exe > $ test -x gurka > $ echo $? > 0 This says part of the faking is done via file extension (although an empty length .exe should never occur in practice). I'm also interested in the behavior of the following (which is what I have proposed that autoconf adds to all configure scripts, and will fail if it cannot find a shell that claims to work): test -x /; echo $? test -x .; echo $? printf '#!/bin/sh\nexit 0\n' > foo.sh ./foo.sh; echo $? test -x foo.sh; echo $? chmod a+x foo.sh; echo $? ./foo.sh; echo $? test -x foo.sh; echo $? Once I know those behaviors, I think I can ensure that my proposed test to require a "working" 'test -x' as a pre-req of finding a sane shell should still work for MSYS. -- Eric Blake eblake@xxxxxxxxxx +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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