diff options
Diffstat (limited to 'lib/libc/stdio/snprintf.c')
| -rw-r--r-- | lib/libc/stdio/snprintf.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/lib/libc/stdio/snprintf.c b/lib/libc/stdio/snprintf.c index 2afabe725a0..9523431bf00 100644 --- a/lib/libc/stdio/snprintf.c +++ b/lib/libc/stdio/snprintf.c @@ -35,9 +35,10 @@ */ #if defined(LIBC_SCCS) && !defined(lint) -static char rcsid[] = "$OpenBSD: snprintf.c,v 1.4 1997/11/29 19:28:29 millert Exp $"; +static char rcsid[] = "$OpenBSD: snprintf.c,v 1.5 1998/01/12 06:14:31 millert Exp $"; #endif /* LIBC_SCCS and not lint */ +#include <limits.h> #include <stdio.h> #ifdef __STDC__ #include <stdarg.h> @@ -60,18 +61,21 @@ snprintf(str, n, fmt, va_alist) va_list ap; FILE f; - if ((int)n < 1) - return (-1); + /* While snprintf(3) specifies size_t stdio uses an int internally */ + if (n > INT_MAX) + n = INT_MAX; #ifdef __STDC__ va_start(ap, fmt); #else va_start(ap); #endif + f._file = -1; f._flags = __SWR | __SSTR; f._bf._base = f._p = (unsigned char *)str; - f._bf._size = f._w = n - 1; + f._bf._size = f._w = n ? n - 1 : 0; ret = vfprintf(&f, fmt, ap); - *f._p = 0; + if (n) + *f._p = 0; va_end(ap); return (ret); } |