Joerg Schilling wrote:
> Darren Reed <dr146992 at sac.sfbay.sun.com> wrote:
> 
>> EXAMPLES
>>
>>      The main() function of a network server could look like this:
>>
>>      int background; /* background flag */
>>
>>      /* Load and verify the configuration. */
>>
>>      /* Go into background. */
>>      if (background && daemon(0, 0) < 0)
>>              err(1, "daemon");
> 
> Does libc include a function called err()?

Yes:

changeset:   4891:f4f971e9574d
date:        Sat Aug 18 10:07:23 2007 -0700
description:
         PSARC/2006/662 Make err/warn part of Solaris's libc
         6495220 add err() et al. to libc

-- 
Darren J Moffat

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