Xref: utzoo comp.bugs.4bsd:1663 comp.std.c:4176
Path: utzoo!utgpu!watserv1!watmath!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!apple!well!jef
From: jef@well.sf.ca.us (Jef Poskanzer)
Newsgroups: comp.bugs.4bsd,comp.std.c
Subject: Re: Bug in users command
Message-ID: <22855@well.sf.ca.us>
Date: 24 Jan 91 02:37:16 GMT
References: <12360:Jan2320:15:5291@kramden.acf.nyu.edu>
Reply-To: Jef Poskanzer <jef@well.sf.ca.us>
Organization: Paratheo-Anametamystikhood Of Eris Esoteric, Ada Lovelace Cabal
Lines: 19

In the referenced message, brnstnd@kramden.acf.nyu.edu (Dan Bernstein) wrote:
}(The most
}obvious implementation, of course, is to use char *'s, and add bytes
}manually.

Yeah, that's what I did when I wrote a users clone last year:

    #define MAXNAMES 1000
    static char users[MAXNAMES][UT_NAMESIZE+1];
    (void) strncpy( users[nusers], u.ut_name, UT_NAMESIZE );
    users[nusers][UT_NAMESIZE] = '\0';

And yes, this will fail if more than 1000 users are logged in at
the same time.  Imagine how concerned I am.
---
Jef

  Jef Poskanzer  jef@well.sf.ca.us  {apple, ucbvax, hplabs}!well!jef
      If ignorance is bliss, why aren't there more happy people?