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Old 05-08-2005, 11:34 AM   #1
Registered: Apr 2004
Distribution: Debian -unstable
Posts: 700

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exit codes

most programs exit 0 on success and non 0 on failure . what if we have some sort of server wich is password protected . on every new connection , a child process is spawned . the child process asks for a password and gets an incorrect one . after this , it will shutdown the socket and exit . question is .. should it exit 0 or non 0 ? is a bad password considered "failure" or not ? wich cases are considered program failures ?
Old 05-08-2005, 11:49 AM   #2
LQ Newbie
Registered: Apr 2005
Posts: 26

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Thats more like a personal decision, if you need to say someway that the password was wrong you could make an exit(EXIT_FAILURE); (i think thats the name of the constant) , if the succed of the program dependes on a succesfull logon, you can consider that if it fails, the program fails too, cuz it couldent fullfill it's objective.

I hope i was in some way helfull for you, Dam.
Old 05-08-2005, 12:53 PM   #3
jim mcnamara
Registered: May 2002
Posts: 964

Rep: Reputation: 36
There is a convention that is defined for error return codes.
They are defined in sysexits.h For example bad user data like a password that you want to exit with error is
exit( EX_USAGE);


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