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