Path: utzoo!mnetor!uunet!husc6!hao!ames!pasteur!ucbvax!ucsfcgl!cca.ucsf.edu!rk9005
From: rk9005@cca.ucsf.edu (Roland McGrath)
Newsgroups: comp.unix.wizards
Subject: (stdio) What should pay attention to the error indicator?
Message-ID: <1194@ucsfcca.ucsf.edu>
Date: 17 Mar 88 02:37:57 GMT
Reply-To: roland@rtsg.lbl.gov (Roland McGrath)
Organization: Hackers Anonymous International, Ltd., Inc. (Applications welcome)
Lines: 18

Can any of you Unix wizards out there tell me what the
various stdio functions and macros should do when trying to talk
to a stream whose error indicator (as returned by ferror()) is set?

For example, if a stream's error indicator is set because of
a previous write error, should subsequent read and write attempts
fail until the indicator is cleared?  What should clear the
error indicator other than clearerr()?

I would like both explanations of what various Unices do,
what you all think *should* be done and definitely what the ANSI
C standard has to say about it (I have been unable to find anything
in the January draft about it except that a write error should
set the error indicator).
-- 
	Roland McGrath
ARPA: roland@rtsg.lbl.gov roland@lbl-rtsg.arpa
UUCP: ...!ucbvax!lbl-rtsg.arpa!roland