Why /usr/bin/*.dll must be executable?

De-Jian Zhao dejian.zhao@gmail.com
Fri Apr 20 13:05:00 GMT 2012


On 2012-4-20 21:02, De-Jian Zhao wrote:
> 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@acer /usr/bin
> $ chmod a-x *.dll
>
> Administrator@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
>

lh is an alias to 'ls -lh'.

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