Getting return code "127" after execution of program

Getting return code "127" after execution of program

[rajesh kesavan]

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Hi,

We are Trying to execute a program like ./sample.exe on 64 bit Cygwin. This
executable is built with CMake on Cygwin 64 bit.
The Program is not throwing any error or success details. it simply comes
out from the running screen without any error and success states.
and we checked output status using "*$?*" It returns "*127*" output.

We checked the missing libraries by using "cygcheck sample.exe" and added
the required libraries as per the *cygcheck* report.


*Details:*
$ gcc --version
*gcc (GCC) 11.3.0*
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ ld --version
*GNU ld (GNU Binutils) 2.40*
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later
version.
This program has absolutely no warranty.

$ cygcheck --version
*cygcheck (cygwin) 3.4.6*
System Checker for Cygwin
Copyright (C) 1998 - 2023 Cygwin Authors
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Please let me know if you want more details.


Regards,

Rajesh K

Re: Getting return code "127" after execution of program

[Eliot Moss]

On 6/2/2023 5:58 AM, rajesh kesavan via Cygwin wrote:
> Hi,
> 
> We are Trying to execute a program like ./sample.exe on 64 bit Cygwin. This
> executable is built with CMake on Cygwin 64 bit.
> The Program is not throwing any error or success details. it simply comes
> out from the running screen without any error and success states.
> and we checked output status using "*$?*" It returns "*127*" output.
> 

A wondering: Is the program's main declared to return an int, and does
it explicitly return 0?

(I also don't think you needed to include all those lists in your
original post; cygwin@cygwin.com would be enough for now, so I have
trimmed other lists from my response.)

Eliot Moss

RE: [EXTERNAL] Getting return code "127" after execution of program

[Lavrentiev, Anton (NIH/NLM/NCBI) [C]]

> The Program is not throwing any error or success details. it simply comes
> out from the running screen without any error and success states.

127 is a POSIX return code meaning the binary file is not executable and cannot be started.

Check what "ldd ./sample" shows.  Most likely you are missing the required runtime (dlls).

HTH,

Anton Lavrentiev
Contractor NIH/NLM/NCBI

Re: [EXTERNAL] Getting return code "127" after execution of program

[Brian Inglis]

On 2023-06-02 09:07, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrote:
>> The Program is not throwing any error or success details. it simply comes
>> out from the running screen without any error and success states.

> 127 is a POSIX return code meaning the binary file is not executable and cannot be started.
> Check what "ldd ./sample" shows.  Most likely you are missing the required runtime (dlls).

Especially check that the DLL dependencies including cygwin1.dll are all 
installed in some .../bin/ directory which is at or near the start of your PATH, 
and that any other file dependencies are also installed under the same upper 
level Cygwin "ROOT" directory (the directory above the cygwin1.dll)!

What those file dependencies are will depend on what your program calls e.g.

$ ls -gloU /etc/{mtab,hosts,networks,protocols,services}
lrwxrwxrwx 1 12 Sep  1  2015 /etc/mtab -> /proc/mounts
lrwxrwxrwx 1 53 Sep  1  2015 /etc/hosts -> 
../proc/cygdrive/c/Windows/System32/drivers/etc/hosts
lrwxrwxrwx 1 56 Sep  1  2015 /etc/networks -> 
../proc/cygdrive/c/Windows/System32/drivers/etc/networks
lrwxrwxrwx 1 56 Sep  1  2015 /etc/protocols -> 
../proc/cygdrive/c/Windows/System32/drivers/etc/protocol
lrwxrwxrwx 1 56 Sep  1  2015 /etc/services -> 
../proc/cygdrive/c/Windows/System32/drivers/etc/services

also /etc/{fstab,fastab.d/,nsswitch}, /dev/{mqueue,shm}, 
/var/run/{cygfork/,utmp} and others.

Some may be set up by the initialization code, others by the Cygwin Setup 
program, or postinstall scripts, and may need to be set up externally if the 
Cygwin Setup program is not used, e.g. /home/, /tmp/, /usr/, /var/ if the 
program calls functions which use those.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

Re: Getting return code "127" after execution of program

[Andrey Repin]

Greetings, rajesh kesavan!

> We are Trying to execute a program like ./sample.exe on 64 bit Cygwin. This
> executable is built with CMake on Cygwin 64 bit.
> The Program is not throwing any error or success details. it simply comes
> out from the running screen without any error and success states.
> and we checked output status using "*$?*" It returns "*127*" output.

> We checked the missing libraries by using "cygcheck sample.exe" and added
> the required libraries as per the *cygcheck* report.

What is more interesting is the output of cygcheck -svr as per

>> Problem reports:      https://cygwin.com/problems.html

> Please let me know if you want more details.

Did you install cygwin on the target system or you naively tried to copy only
DLL's you think are needed?


-- 
With best regards,
Andrey Repin
Saturday, June 3, 2023 20:32:30

Sorry for my terrible english...

Re: Getting return code "127" after execution of program

[Jon Turney]

On 02/06/2023 13:42, Eliot Moss via Cygwin wrote:
> On 6/2/2023 5:58 AM, rajesh kesavan via Cygwin wrote:
>> Hi,
[...]
> (I also don't think you needed to include all those lists in your
> original post; cygwin@cygwin.com would be enough for now, so I have
> trimmed other lists from my response.)

Indeed not.

Rajesh,

You should only ever send mail to the mailing list 'owner' address if 
you have a problem with your subscription to the mailing list.

Therefore, it is probably never appropriate to send mail to both the 
list, and the owner of the list.

Further, cygwin-developers@cygwin.com is explicitly described as for 
"contributing to the development of Cygwin [...]  If you have an issue 
and hope that someone will look into it for you then please do not send 
email here".  That seems a clear request to not send this kind of mail 
there.

By spamming all these addresses, you signal that you are impatient, 
inconsiderate and not respectful of the boundaries of others.

This won't help you engage members of our community who are willing to 
help you solve your problem.

Please don't do it ever again.