"kill -l" ???????????

[pdstatha]

We've been asked to program the kill -l linux command in C. Here's the passage

kill -l
list the signals sent by this command. Your version of kill should recognise SIGTERM, SIGKILL and SIGHUP. It should provide a list of both the name of the signals and their numbers.

I understand what those signals are, and I'm presuming when the program is run output will be something similar to

SIGTERM
SIGKILL
SIGHUP

But when it says their numbers should be listed aswell, what in sam hell does that mean???

[adrianxw]

I would start by havng a look in the signal.h header file, you may see what you want there. Since these tend to be compiler specific, it would be dangerous for me to suggest otherwise.

In general for portability, you should treat a signal as a signal and not assume anything about it's internals, (same is, of course true of other structures).

[Deckard]

Well, if you have to print the numeric value of the signal (which is found in signal.h as Adrian pointed out), you could always do this:

printf( "SIGTERM: %d\n", SIGTERM );