1 /* $OpenBSD: strnlentest.c,v 1.1 2010/06/02 12:20:47 millert Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com> 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 /* Enable malloc security options. */ 33 setenv("MALLOC_OPTIONS", "S", 0); 34 35 bufsize = getpagesize(); /* trigger guard pages easily */ 36 buf = malloc(bufsize); 37 if (buf == NULL) { 38 fprintf(stderr, "unable to allocate memory\n"); 39 return 1; 40 } 41 memset(buf, 'a', bufsize); 42 43 len = strnlen(buf, bufsize); 44 if (len != bufsize) { 45 fprintf(stderr, "strnlen: failed unterminated buffer test (1)"); 46 failures++; 47 } 48 49 len = strnlen(buf, bufsize / 2); 50 if (len != bufsize / 2) { 51 fprintf(stderr, "strnlen: failed unterminated buffer test (2)"); 52 failures++; 53 } 54 55 buf[bufsize - 1] = '\0'; 56 len = strnlen(buf, bufsize); 57 if (len != bufsize - 1) { 58 fprintf(stderr, "strnlen: failed NUL-terminated buffer test (1)"); 59 failures++; 60 } 61 62 len = strnlen(buf, (size_t)-1); 63 if (len != bufsize - 1) { 64 fprintf(stderr, "strnlen: failed NUL-terminated buffer test (2)"); 65 failures++; 66 } 67 68 return failures; 69 } 70