From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <f2c50e3e2222c1459e0d7cfe8032f37f@vitanuova.com>
To: 9fans@cse.psu.edu
Subject: Re: Error reporting (Was: [9fans] GNU Make)
Date: Thu,  3 Jun 2004 20:35:38 +0100
From: rog@vitanuova.com
In-Reply-To: <000c01c4499e$39145230$637f7d50@SOMA>
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> > as far as i remember, most error codes in unix were
> > either EINVAL or EIO...
>
> bzzzzt!  no

well, i might have exaggerated a little, but a quick poke around the
bsd man pages gives me the following percentages (of all error codes
mentioned, 1129 total):

13.55 EINVAL
 10.36 EFAULT
  7.09 EIO
  6.82 EACCES
  6.64 EPERM
  5.49 EBADF
  4.87 ENOENT
  4.51 ENOTDIR
  4.25 ELOOP
  4.25 ENAMETOOLONG
  3.37 EROFS
  2.39 EAGAIN
  [...]

so EINVAL and EIO are definitely up there.  EFAULT pretty much always
means the same thing, so it doesn't count.