coreutils/lib/strndup.c

/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.

NOTE: The canonical source of this file is maintained with the GNU C Library.
Bugs can be reported to bug-glibc@prep.ai.mit.edu.

This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>
#include <sys/types.h>

#ifdef STDC_HEADERS
# include <string.h>
# include <stdlib.h>
#else
char *malloc ();
#endif

/* Duplicate S, returning an identical malloc'd string.  */
char *
strndup (const char *s, size_t n)
{
  char *new = malloc (n + 1);

  if (new == NULL)
    return NULL;

  new[n] = '\0';
  return (char *) memcpy (new, s, n);
}