src/strlcpy.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2009, 2010 Daniel Borkmann.
   5  * Subject to the GPL, version 2.
   6  */
   7
   8 /*
   9  * strlcpy, Copyright (C) 1991, 1992  Linus Torvalds
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  19  * for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
  24  */
  25
  26 #define _BSD_SOURCE
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <stdarg.h>
  30
  31 #include "strlcpy.h"
  32
  33 size_t strlcpy(char *dest, const char *src, size_t size)
  34 {
  35         size_t ret = strlen(src);
  36
  37         if (size) {
  38                 size_t len = (ret >= size) ? size - 1 : ret;
  39                 memcpy(dest, src, len);
  40                 dest[len] = '\0';
  41         }
  42
  43         return ret;
  44 }
  45
  46 int slprintf(char *dst, size_t size, const char *fmt, ...)
  47 {
  48         int ret;
  49         va_list ap;
  50
  51         va_start(ap, fmt);
  52         ret = vsnprintf(dst, size, fmt, ap);
  53         dst[size - 1] = '\0';
  54         va_end(ap);
  55
  56         return ret;
  57 }
  58