1 /* $OpenBSD: strndup.c,v 1.2 2015/08/31 02:53:57 guenther 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 "config.h" 20 #if !defined(HAVE_STRNDUP) || defined(BROKEN_STRNDUP) 21 #include <sys/types.h> 22 23 #include <stddef.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 char * 28 strndup(const char *str, size_t maxlen) 29 { 30 char *copy; 31 size_t len; 32 33 len = strnlen(str, maxlen); 34 copy = malloc(len + 1); 35 if (copy != NULL) { 36 (void)memcpy(copy, str, len); 37 copy[len] = '\0'; 38 } 39 40 return copy; 41 } 42 DEF_WEAK(strndup); 43 #endif /* HAVE_STRNDUP */ 44