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Date:	Fri, 20 Apr 2012 21:02:29 +0800
From:	De-Jian Zhao <dejian DOT zhao AT gmail DOT com>
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To:	CygwinList <cygwin AT cygwin DOT com>
Subject:	Why /usr/bin/*.dll must be executable?
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Hi,

When I type "cyg" and Tab, many executables starting with "cyg" are 
listed (Display all 262 possibilities? (y or n) y). I find that many of 
them are *.dll libraries under /usr/bin/. This is inconvenient to find 
the real executable applications (*.exe). Since *.dll files are only 
libraries, they are not necessary to have the attribute of "x". Thus, I 
run the command "chmod a-x /usr/bin/*.dll". Unexpectedly, cygwin is 
corrupted. I closed the terminal and failed to restart Cygwin. I started 
my  older version of Cygwin (I did not deleted it after installing a new 
version), and added "x" to the previous *.dll files. The dead Cygwin 
revived.

I am confused why /usr/bin/*.dll should be executable. I thought they 
were only library files. When I tried to run a dll file, bash says 
"cannot execute binary file". Are there some hidden stories?

The error messages are as follows:

Administrator AT acer /usr/bin
$ chmod a-x *.dll

Administrator AT acer /usr/bin
$ lh
      18 [main] -bash 4512 fork: child -1 - forked process died 
unexpectedly, retry 0, exit code -1073741790, errno 11
-bash: fork: retry: Resource temporarily unavailable
2020930 [main] -bash 4512 fork: child -1 - forked process died 
unexpectedly, retry 0, exit code -1073741790, errno 11
-bash: fork: retry: Resource temporarily unavailable
4039235 [main] -bash 4512 fork: child -1 - forked process died 
unexpectedly, retry 0, exit code -1073741790, errno 11
-bash: fork: retry: Resource temporarily unavailable
8057832 [main] -bash 4512 fork: child -1 - forked process died 
unexpectedly, retry 0, exit code -1073741790, errno 11
-bash: fork: retry: Resource temporarily unavailable
16074662 [main] -bash 4512 fork: child -1 - forked process died 
unexpectedly, retry 0, exit code -1073741790, errno 11
-bash: fork: Resource temporarily unavailable


DJ

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