Exit status

vedanu · 06-23-2007, 01:52 AM

Hello ...,

I have noticed in some programs... there will be an exit statement to terminate the application.

like

Quote:

exit(0),exit(1),exit(30)...

what does these numbers actually means... does it make any difference in using different status number
can any one list the exit status number and the meaning or the actual usage of the exit status number.

nc3b · 06-23-2007, 02:41 AM

The exit status is relative to every program (that is it can mean different things for different programs).

It is used primarily to determine the exit reason, the exit conditions, and error etc. For instance, in the unix world, an exit 0 usually means success, the program performed and exited without problems. exit 1 means some problem occurred. To see the exit status of a program type echo $? just after running it.

vedanu · 06-23-2007, 02:55 AM

Quote:

Originally Posted by nc3b

To see the exit status of a program type echo $? just after running it.

I am able to see 30 or 99 .. when I type echo $? after I run the application
But I want to know what does it actually mean to the programmer... while giving the status

nc3b · 06-23-2007, 09:35 AM

Well, you could ask the programmer, read the sourcecode or read some documentation. How else did you think you could find the meaning of the exit status?

H_TeXMeX_H · 06-23-2007, 05:13 PM

Here's a neat thing you can do if you can't find a list.

Open up python (if you have it, if not, install it, it's very useful), and run this:

Code:

import os
os.strerror(0)

Instead of 0, you can put any error code. These are the standard error codes ... some programmers may not abide by them ...

error code 0 is, of course 'Success'