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/*
* Copyright (c) 2005 Darren Tucker
* Copyright (c) 2005 Damien Miller
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define BUFSZ 2048
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
static int failed = 0;
static void
fail(const char *m)
{
fprintf(stderr, "snprintftest: %s\n", m);
failed = 1;
}
int x_snprintf(char *str, size_t count, const char *fmt, ...)
{
size_t ret;
va_list ap;
va_start(ap, fmt);
ret = vsnprintf(str, count, fmt, ap);
va_end(ap);
return ret;
}
int
main(void)
{
char b[5];
char *src;
snprintf(b,5,"123456789");
if (b[4] != '\0')
fail("snprintf does not correctly terminate long strings");
/* check for read overrun on unterminated string */
if ((src = malloc(BUFSZ)) == NULL) {
fail("malloc failed");
} else {
memset(src, 'a', BUFSZ);
snprintf(b, sizeof(b), "%.*s", 1, src);
if (strcmp(b, "a") != 0)
fail("failed with length limit '%%.s'");
}
/* check that snprintf and vsnprintf return sane values */
if (snprintf(b, 1, "%s %d", "hello", 12345) != 11)
fail("snprintf does not return required length");
if (x_snprintf(b, 1, "%s %d", "hello", 12345) != 11)
fail("vsnprintf does not return required length");
return failed;
}
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