1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifdef HAVE_CONFIG_H 19 #include <config.h> 20 #endif 21 22 #if defined _LIBC || defined STDC_HEADERS 23 # include <stdlib.h> 24 # include <string.h> 25 #else 26 char *malloc (); 27 char *memcpy (); 28 #endif 29 30 #undef __strdup 31 #undef strdup 32 33 #ifndef weak_alias 34 # define __strdup strdup 35 #endif 36 37 /* Duplicate S, returning an identical malloc'd string. */ 38 char * __strdup(const char * s)39__strdup (const char *s) 40 { 41 size_t len = strlen (s) + 1; 42 void *new = malloc (len); 43 44 if (new == NULL) 45 return NULL; 46 47 return (char *) memcpy (new, s, len); 48 } 49 #ifdef libc_hidden_def 50 libc_hidden_def (__strdup) 51 #endif 52 #ifdef weak_alias 53 weak_alias (__strdup, strdup) 54 #endif 55