Can we define exit status intereger values for our purpose except 0?
like can i set custom exit status messages:
"1" for error occured because of reason #1
"2" for error occured because of reason #2
...
Is there any document which displays all the exit status code values from 0-255?
There are no system wide standard exit codes other than 0 is success
and other than 0 is generally regarded as an error. It is completely up
to you how you want to handle exit codes.
Some exit codes are expected under certain circumstances in decent shell code and should be used for those conditions:
http://www.tldp.org/LDP/abs/html/exitcodes.html#EXITCODESREF
Another point of view is to standardize your exit codes using the values taken from the C header file sysexits.h
http://cvs.opensolaris.org/source/xref/on/usr/src/head/sysexits.h
Granted, you should not use those codes, but you also do not need to attempt to handle these conditions for yourself either. The system/shell will generally take care of these for you.
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