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| author | ache <ache@FreeBSD.org> | 2016-09-08 07:14:48 +0000 |
|---|---|---|
| committer | ache <ache@FreeBSD.org> | 2016-09-08 07:14:48 +0000 |
| commit | 11eb45c08752b180e8521ee076638d3e021bc9db (patch) | |
| tree | a7b689fdd8cd6809acae1e5ffe01ad39f86ee1a8 /lib/libc | |
| parent | 56ade7a489e1dc176faf0206cbed2f8659a92648 (diff) | |
| download | FreeBSD-src-11eb45c08752b180e8521ee076638d3e021bc9db.zip FreeBSD-src-11eb45c08752b180e8521ee076638d3e021bc9db.tar.gz | |
MFC r305413
Fix error handling.
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/stdio/fgets.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/libc/stdio/fgets.c b/lib/libc/stdio/fgets.c index 9abf559..a2e39ed 100644 --- a/lib/libc/stdio/fgets.c +++ b/lib/libc/stdio/fgets.c @@ -37,6 +37,7 @@ static char sccsid[] = "@(#)fgets.c 8.2 (Berkeley) 12/22/93"; __FBSDID("$FreeBSD$"); #include "namespace.h" +#include <errno.h> #include <stdio.h> #include <string.h> #include "un-namespace.h" @@ -55,11 +56,16 @@ fgets(char * __restrict buf, int n, FILE * __restrict fp) char *s; unsigned char *p, *t; - if (n <= 0) /* sanity check */ - return (NULL); - FLOCKFILE(fp); ORIENT(fp, -1); + + if (n <= 0) { /* sanity check */ + fp->_flags |= __SERR; + errno = EINVAL; + FUNLOCKFILE(fp); + return (NULL); + } + s = buf; n--; /* leave space for NUL */ while (n != 0) { @@ -69,7 +75,7 @@ fgets(char * __restrict buf, int n, FILE * __restrict fp) if ((len = fp->_r) <= 0) { if (__srefill(fp)) { /* EOF/error: stop with partial or no line */ - if (s == buf) { + if (!__sfeof(fp) || s == buf) { FUNLOCKFILE(fp); return (NULL); } |
