diff options
| author |   pjanzen <pjanzen@openbsd.org> | 2003-05-17 10:28:33 +0000 |
|---|---|---|
| committer | pjanzen <pjanzen@openbsd.org> | 2003-05-17 10:28:33 +0000 |
| commit | cc31c7cdc76a897db3195b460346d80d9d16415d (patch) | |
| tree | 7fbf0e93146d5564f736a1912c234eb5e7109788 /lib/libc | |
| parent | tweak; 10x jmc (diff) | |
| download | wireguard-openbsd-cc31c7cdc76a897db3195b460346d80d9d16415d.tar.xz wireguard-openbsd-cc31c7cdc76a897db3195b460346d80d9d16415d.zip | |
Document behaviour when size = 1. ok millert@
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/stdio/fgets.3 | 15 | ||||
| -rw-r--r-- | lib/libc/stdio/fgets.c | 3 |
2 files changed, 16 insertions, 2 deletions
diff --git a/lib/libc/stdio/fgets.3 b/lib/libc/stdio/fgets.3 index 00f708d6be8..8d0df4d816d 100644 --- a/lib/libc/stdio/fgets.3 +++ b/lib/libc/stdio/fgets.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: fgets.3,v 1.15 2003/03/06 20:48:35 jmc Exp $ +.\" $OpenBSD: fgets.3,v 1.16 2003/05/17 10:28:33 pjanzen Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -96,6 +96,19 @@ do not distinguish between end-of-file and error, and callers must use and .Xr ferror 3 to determine which occurred. +Whether +.Fn fgets +can possibly fail with a +.Ar size +argument of 1 is implementation-dependent. +On +.Ox , +.Fn fgets +will never return +.Dv NULL +when +.Ar size +is 1. .Sh ERRORS .Bl -tag -width Er .It Bq Er EBADF diff --git a/lib/libc/stdio/fgets.c b/lib/libc/stdio/fgets.c index c2bf76f79cf..4e527978998 100644 --- a/lib/libc/stdio/fgets.c +++ b/lib/libc/stdio/fgets.c @@ -35,7 +35,7 @@ */ #if defined(LIBC_SCCS) && !defined(lint) -static char rcsid[] = "$OpenBSD: fgets.c,v 1.3 2001/07/09 06:57:44 deraadt Exp $"; +static char rcsid[] = "$OpenBSD: fgets.c,v 1.4 2003/05/17 10:28:33 pjanzen Exp $"; #endif /* LIBC_SCCS and not lint */ #include <stdio.h> @@ -46,6 +46,7 @@ static char rcsid[] = "$OpenBSD: fgets.c,v 1.3 2001/07/09 06:57:44 deraadt Exp $ * Read at most n-1 characters from the given file. * Stop when a newline has been read, or the count runs out. * Return first argument, or NULL if no characters were read. + * Do not return NULL if n == 1. */ char * fgets(buf, n, fp) |