1 /* $OpenBSD: strnlentest.c,v 1.3 2021/09/01 09:26:32 jasper Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Todd C. Miller <millert@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <unistd.h> 25 26 int main(int argc, char *argv[]) 27 { 28 char *buf; 29 int failures = 0; 30 size_t len, bufsize; 31 32 bufsize = getpagesize(); /* trigger guard pages easily */ 33 buf = malloc(bufsize); 34 if (buf == NULL) { 35 fprintf(stderr, "unable to allocate memory\n"); 36 return 1; 37 } 38 memset(buf, 'a', bufsize); 39 40 len = strnlen(buf, bufsize); 41 if (len != bufsize) { 42 fprintf(stderr, "strnlen: failed unterminated buffer test (1)"); 43 failures++; 44 } 45 46 len = strnlen(buf, bufsize / 2); 47 if (len != bufsize / 2) { 48 fprintf(stderr, "strnlen: failed unterminated buffer test (2)"); 49 failures++; 50 } 51 52 buf[bufsize - 1] = '\0'; 53 len = strnlen(buf, bufsize); 54 if (len != bufsize - 1) { 55 fprintf(stderr, "strnlen: failed NUL-terminated buffer test (1)"); 56 failures++; 57 } 58 59 len = strnlen(buf, (size_t)-1); 60 if (len != bufsize - 1) { 61 fprintf(stderr, "strnlen: failed NUL-terminated buffer test (2)"); 62 failures++; 63 } 64 65 return failures; 66 } 67