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Date: Wed, 9 Oct 2002 17:53:10 +0800 (KRAST)
From: Eugene Grosbein <eugen@grosbein.pp.ru>
To: FreeBSD-gnats-submit@freebsd.org
Subject: undocumented possibiliny of non-zero errno *printf(3)
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>Number:         43854
>Category:       docs
>Synopsis:       undocumented possibiliny of non-zero errno *printf(3)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-doc
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 09 03:00:09 PDT 2002
>Closed-Date:    Thu Dec 19 23:38:21 PST 2002
>Last-Modified:  Thu Dec 19 23:38:21 PST 2002
>Originator:     Eugene Grosbein
>Release:        FreeBSD 4.6-STABLE i386
>Organization:
Svyaz Service JSC
>Environment:
System: FreeBSD www.svzserv.kemerovo.su 4.6-STABLE FreeBSD 4.6-STABLE #1: Sat Sep 28 00:20:38 KRAST 2002 eu@www.svzserv.kemerovo.su:/home4/obj/home2/src/sys/WWW i386

>Description:
		man page for printf(3) does not mention that errno may
		be set to non-zero value as error condition indicator

>How-To-Repeat:

man 3 printf | col -b | grep errno
cd /usr/src/lib/libc/stdio; grep errno *printf.c

		You can see that at least asprintf/vasprintf may set errno
		themselves, but they and any other can perhaps return errno!=0
		that was set by lower layer functions (f.e., write(2)).

>Fix:

		Create ERRORS section.
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: tjr 
State-Changed-When: Thu Dec 19 23:36:54 PST 2002 
State-Changed-Why:  
Duplicate of docs/39257, which I am about to fix. 
http://www.freebsd.org/cgi/query-pr.cgi?pr=docs/39257 

http://www.freebsd.org/cgi/query-pr.cgi?pr=43854 
>Unformatted:
