1 /* $OpenBSD: strndup.c,v 1.1 2010/05/18 22:24:55 tedu 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/cdefs.h> 20 #include <stddef.h> 21 #include <stdlib.h> 22 #include <string.h> 23 24 char * 25 strndup(const char *str, size_t maxlen) 26 { 27 char *copy; 28 size_t len; 29 30 len = strnlen(str, maxlen); 31 copy = malloc(len + 1); 32 if (copy != NULL) { 33 (void)memcpy(copy, str, len); 34 copy[len] = '\0'; 35 } 36 37 return copy; 38 } 39