1  /* Copyright (C) 1991, 1996-1998, 2002-2004, 2006-2007, 2009-2023 Free Software
       2     Foundation, Inc.
       3  
       4     This file is part of the GNU C Library.
       5  
       6     This file is free software: you can redistribute it and/or modify
       7     it under the terms of the GNU Lesser General Public License as
       8     published by the Free Software Foundation; either version 2.1 of the
       9     License, or (at your option) any later version.
      10  
      11     This file is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public License
      17     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _LIBC
      20  # include <config.h>
      21  #endif
      22  
      23  /* Get specification.  */
      24  #include <string.h>
      25  
      26  #include <stdlib.h>
      27  
      28  #undef __strdup
      29  #ifdef _LIBC
      30  # undef strdup
      31  #endif
      32  
      33  #ifndef weak_alias
      34  # define __strdup strdup
      35  #endif
      36  
      37  /* Duplicate S, returning an identical malloc'd string.  */
      38  char *
      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