Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!seismo!brl-tgr!gwyn From: gwyn@brl-tgr.ARPA (Doug Gwyn) Newsgroups: net.unix-wizards Subject: Re: Re: SHMOP (SYSV) returns -1 on error Message-ID: <2408@brl-tgr.ARPA> Date: Thu, 24-Oct-85 16:54:31 EDT Article-I.D.: brl-tgr.2408 Posted: Thu Oct 24 16:54:31 1985 Date-Received: Sat, 26-Oct-85 04:10:26 EDT References: <2391@brl-tgr.ARPA> Organization: Ballistic Research Lab Lines: 6 > I thought that every SYSTEM CALL returned -1 on error. For example, read > returns -1 if you give it a fid that hasn't been opened, is not readable etc. > EOF is NOT considered an error, and is signalled by a 0 return. Thus SHMOP > returning -1 on an error would be consistent with all other system calls. So tell me, what does that mean for a (char *)-valued function?