pw/fileupd.c

   1 /*-
   2  * Copyright (C) 1996
   3  *      David L. Nugent.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #ifndef lint
  28 static const char rcsid[] =
  29   "$FreeBSD$";
  30 #endif /* not lint */
  31
  32 #include <stdio.h>
  33 #include <fcntl.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #include <sys/param.h>
  39 #include <errno.h>
  40 #include <unistd.h>
  41
  42 #include "pwupd.h"
  43
  44 int
  45 extendline(char **buf, int * buflen, int needed)
  46 {
  47         if (needed > *buflen) {
  48                 char    *tmp = realloc(*buf, needed);
  49                 if (tmp == NULL)
  50                         return -1;
  51                 *buf = tmp;
  52                 *buflen = needed;
  53         }
  54         return *buflen;
  55 }
  56
  57 int
  58 extendarray(char ***buf, int * buflen, int needed)
  59 {
  60         if (needed > *buflen) {
  61                 char    **tmp = realloc(*buf, needed * sizeof(char *));
  62                 if (tmp == NULL)
  63                         return -1;
  64                 *buf = tmp;
  65                 *buflen = needed;
  66         }
  67         return *buflen;
  68 }