From:	adf AT mentor-systems DOT com (Austin David France)
Subject:	B20, bash, #! & relative script execution
20 Nov 1998 05:45:58 -0800 :
Message-ID:	<000001be1485$514e89a0$010120c0.cygnus.cygwin32.developers@menpc1>
Mime-Version:	1.0
To:	<cygwin32-developers AT cygnus DOT com>

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B20.0 (0.1/1/1) -11-8 11:59:08
Bash 2.02.1(2)
PATH=/e/gnuwin32/CYGWIN~1/H-I586~1/bin:/c/winnt/system32:/d/mentor/bin
NTW40SP4

I have a script called "xx" in /d/Mentor/Bin

   #!/bin/bash
   echo $@

From the bash command line, if I type "xx", nothing happens - bash hangs -
until I hit ^c

The last few cygwin1.dll traces output by this are:
--------------------------------------------------------------------------
[main] bash 1001 (0) find_exec:
e:\GnuWin32\cygwin-b20\H-i586-cygwin32\bin\bash.exe = find_exec (/bin/bash)
[main] bash 1001 (0) spawn_guts: getting path of /d/mentor/bin/xx
[main] bash 1001 (0) spawn_guts: path is
[sig] bash 1001 (0) wait_sig: sigcatch_nonmain 0x15
----------------------------------------------------------------------------
-
The problems seem to start in spawn.cc around line 381 (based on the 981116
snapshot of winsup), in particular the debug at line 384 (spawn_guts: path
is) above outputs an empty string, suggesting a problem perhaps in
split_path(), or should ptr be modified to point at buf?

If I type /d/mentor/bin/xx this code is not executed (because an absolute
path is supplied) and the script runs correctly, i.e. bash does not hang.
So the problem appears to be a combination of a script found by searching
the path.

Interestingly, if I rename the script to be xx34567 and type "xx34567" the
script executes correctly, anything shorter and the script hangs.  A
colleague who also has NTW40SP4 & B20 has exactly the same problem, except
he can run scripts with names > 4 characters in length.

This is my first dip into the source code so apologies for not investigating
further.  I will continue to investigate, but you peeps can probably sort it
in a much more timely manner.

Austin David France
Mentor Systems plc
mailto:adf AT mentor-systems DOT com

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