Grabbing return value from a program

[scorpio_IITR]

Hi all,
I am working on a project in which I need to run a program (I don't have the code, only the executable) and as programme terminates, I need to recive the return value it emits with its return statement.
Plz help me....
Thanks in advance...

Scorpio

[jim mcnamara]

If the OS is Unix the return value is in a shell variable named -- $?

I think we need a little more information, please.

[Emmanuel Delaha]

I am working on a project in which I need to run a program (I don't have the code, only the executable) and as programme terminates, I need to recive the return value it emits with its return statement.

It's not a C question. It's a system shell question...

[Hammer]

Off to the tech forum we go....

In a Windows console, use %ERRORLEVEL%

Type "help if" and you might get something that contains this:

 %ERRORLEVEL% will expand into a string representation of
 the current value of ERRORLEVEL, provided that there is not already
 an environment variable with the name ERRORLEVEL, in which case you
 will get its value instead.  After running a program, the following illustrates ERRORLEVEL use:
 
 	goto answer%ERRORLEVEL%
 	:answer0
 	echo Program had return code 0
 	:answer1
 	echo Program had return code 1
 
 You can also using the numerical comparisons above:
 
 	IF %ERRORLEVEL% LEQ 1 goto okay

[scorpio_IITR]

I am working in Linux, I wanted my C programme to pickup the return value directly. I am currently using shell script to do the same thing, recive the value and generate a kill signal if not equal to zero.....

I want to eliminate dependence on shell script....

Help Plz....

[Hammer]

Post some code showing what you're trying to achieve.

[anonytmouse]

int return_value = system(my_program);
printf("The return value from my program was %d\n", return_value);