libcli/dns/resolvconftest.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Internal DNS query structures
   4  *  Copyright (C) Volker Lendecke 2018
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program 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 General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <talloc.h>
  23 #include <errno.h>
  24 #include "libcli/dns/resolvconf.h"
  25 #include "lib/util/memory.h"
  26
  27 static int resolvconftest1(void)
  28 {
  29         const char *content =
  30                 "#foo\nbar\nnameserver 1.2.3.4\nnameserver 2.3.4.5";
  31         char *file;
  32         FILE *fp;
  33         int ret;
  34         char **nameservers;
  35         size_t num_nameservers;
  36
  37         file = strdup(content);
  38         if (file == NULL) {
  39                 perror("strdup failed");
  40                 return ENOMEM;
  41         }
  42         fp = fmemopen(file, strlen(file), "r");
  43         if (fp == NULL) {
  44                 perror("fmemopen failed");
  45                 return errno;
  46         }
  47
  48         ret = parse_resolvconf_fp(fp, NULL, &nameservers, &num_nameservers);
  49         if (ret != 0) {
  50                 fprintf(stderr, "parse_resolvconf_fp failed: %s\n",
  51                         strerror(ret));
  52                 return ret;
  53         }
  54
  55         if (num_nameservers != 2) {
  56                 fprintf(stderr, "expected 2 nameservers, got %zu\n",
  57                         num_nameservers);
  58                 return EIO;
  59         }
  60         if ((strcmp(nameservers[0], "1.2.3.4") != 0) ||
  61             (strcmp(nameservers[1], "2.3.4.5") != 0)) {
  62                 fprintf(stderr, "got wrong nameservers\n");
  63                 return EIO;
  64         }
  65
  66         TALLOC_FREE(nameservers);
  67         fclose(fp);
  68         SAFE_FREE(file);
  69
  70         return 0;
  71 }
  72
  73 int main(void) {
  74         int ret;
  75
  76         ret = resolvconftest1();
  77         if (ret != 0) {
  78                 return 1;
  79         }
  80
  81         return 0;
  82 }