Subject: err(3) and error handling
To: None <current-users@NetBSD.ORG>
From: VaX#n8 <email@example.com>
Date: 02/04/1995 16:44:05
I was looking at a strange error message given by mount_msdos the
other day... if you don't send it a proper partition (i.e. a MS-DOS one),
"mount_msdos: invalid argument"
This was a bit puzzling to my friend who is new to Unix. I eventually
tracked down why a bad partition was an invalid argument; EINVAL was being
returned from mount(2), and err(3) was spitting out the error message.
So my question is, what is the right way to give a more descriptive
1) Special-case the EINVAL and print something better out. Taken to the
extreme, this implies making a lot of source much bigger and harder to read.
2) Add another E* error code and description. Again, taken to the extreme,
this means a lot of E* error codes
3) Wait around for some kind of system-wide message database thing, probably
one that supports natural language for different locales... is there such a
thing in the works? This probably (at least) means defining a big array
of error messages for your code and then calling the nl-supp funcs with an
VaX#n8 (vak-sa-nate) - n, CS senior++ and Unix junkie - firstname.lastname@example.org
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