diff options
Diffstat (limited to 'openbsd-compat/regress/snprintftest.c')
-rw-r--r-- | openbsd-compat/regress/snprintftest.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/openbsd-compat/regress/snprintftest.c b/openbsd-compat/regress/snprintftest.c new file mode 100644 index 00000000..e25bf223 --- /dev/null +++ b/openbsd-compat/regress/snprintftest.c @@ -0,0 +1,72 @@ +/* + * 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> + +static int failed = 0; + +static void +fail(const char *m) +{ + fprintf(stderr, "%s", 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; +} |