Re: [9fans] /sys/include/ape/errno.h

[Charles Forsyth <forsyth@terzarima.net>]

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they certainly differ between Unix system variants
they differ between xBSD and Linux.

finding them on Linux is fun:
	errno.h -> bits/errno.h + ifdefs + defs -> linux/errno.h -> asm/errno.h [whew!]

which i note in passing has
	#define EWOULDBLOCK EAGAIN

amongst other values, i find for example on FreeBSD:

#define	ENETDOWN	50		/* Network is down */
#define	ENETUNREACH	51		/* Network is unreachable */
#define	ENETRESET	52		/* Network dropped connection on reset */

but on Linux:

#define	ENETDOWN	100	/* Network is down */
#define	ENETUNREACH	101	/* Network is unreachable */
#define	ENETRESET	102	/* Network dropped connection because of reset */

and on Irix5.3 and Solaris

#define ENETDOWN        127             /* Network is down */
#define ENETUNREACH     128             /* Network is unreachable */
#define ENETRESET       129             /* Network dropped connection because

so all in all it seems a relative waste of time
and effort to make Plan 9's match
one rather than the other.

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From: "Russ Cox" <rsc@swtch.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] /sys/include/ape/errno.h
Date: Tue, 06 Jan 2004 08:25:42 -0500
Message-ID: <E1AdrDL-000JNk-Ng@t40.swtch.com>

> What would be safe here?  Renumber all the error codes to match
> NetBSD (I'm sure all *BSDs are identical, but I guess I ought to
> check) and submit the changed header file to Bell Labs so that a
> new copy of libap.a can be generated to match?

down that path lies madness.  use the names, that's what they're for.
the numbers aren't supposed to matter!

russ