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#1 (**permalink**) 01-05-2008, 09:52 AM

How can we find the exit code of the process that we run using the
truss command. If i check the value of $? i get the exit code for the
truss command and not for the process started using truss.

I see that in HP-UX the -k option helps out in this case. When this
option is used, tusc exits with the exit code of the process that was
last traced.

Please help.

Thanks in Advance
mmsganesh

#2 (**permalink**) 01-05-2008, 09:53 AM

Can some1 help on this please

neoganesh wrote:
> How can we find the exit code of the process that we run using the
> truss command. If i check the value of $? i get the exit code for the
> truss command and not for the process started using truss.
>
> I see that in HP-UX the -k option helps out in this case. When this
> option is used, tusc exits with the exit code of the process that was
> last traced.
>
> Please help.
>
> Thanks in Advance
> mmsganesh

#3 (**permalink**) 01-05-2008, 09:53 AM

neoganesh wrote:
> How can we find the exit code of the process that we run using the
> truss command. If i check the value of $? i get the exit code for the
> truss command and not for the process started using truss.
>
> I see that in HP-UX the -k option helps out in this case. When this
> option is used, tusc exits with the exit code of the process that was
> last traced.
>
> Please help.
>
> Thanks in Advance
> mmsganesh

#4 (**permalink**) 01-05-2008, 09:54 AM

neoganesh wrote:
> How can we find the exit code of the process that we run using the
> truss command. If i check the value of $? i get the exit code for the
> truss command and not for the process started using truss.
>
> I see that in HP-UX the -k option helps out in this case. When this
> option is used, tusc exits with the exit code of the process that was
> last traced.
>
> Please help.
>
> Thanks in Advance
> mmsganesh

Curiously the exit status for truss does not appear to be defined (at
http://publib.boulder.ibm.com/infoce...formation.htm).
I suspect that it will always return 0 if it finds and executes the
command. It looks like it returns 2 if no command is found or an
invalid flag is specified.
To capture the exit code of your program you will have to scan the
output of truss, eg
truss false 2>&1 | awk -F'[()]' '{status=$1} END {print status}'
The awk script is there to expect a final line like "_exit(1)" and
print the value within parentheses, ie "1". Note that this was done
from a ksh prompt. If you don't want to redirect stderr to stdout you
could use the -o flag instead and process that output file with the awk
command after the truss command has completed, ie truss and awk on
separate lines.
Hope this helps.
Jeffrey

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Exit code of process run using truss