Are there any standard exit status codes in Linux

Question

A process is considered to have completed correctly in Linux if its exit status was 0.

I've seen that segmentation faults often result in an exit status of 11, though I don't know if this is simply the convention where I work (the applications that failed like that have all been internal) or a standard.

Are there standard exit codes for processes in Linux?

Answer 1

Aside from 0 indicating success, there are no conventional exit codes. In addition, non-zero does not always imply failure.

EXIT FAILURE is set to 1 and EXIT SUCCESS is set to 0, but that's about it in the header file stdlib.h.

The 11 on segmentation fault is noteworthy since 11 is the signal number used by the kernel to terminate a process when it encounters a segmentation fault. There's probably a mechanism somewhere, either in the kernel or in the shell, that converts that to an exit code.