src/config.c

   1 /*
   2  * Copyright (c) 2014 Ian Sutton <ian@kremlin.cc>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <unistd.h>
  18 #include <fcntl.h>
  19 #include <gio/gio.h>
  20
  21 static GKeyFile *config;
  22
  23 static const gchar *CONFIG_KEYS[] = {
  24         "PrettyHostname",
  25         "IconName",
  26         "ChassisType"
  27 };
  28
  29 /* NULL if key doesn't exist */
  30 gchar *get_option(gchar *key, gchar *group) {
  31
  32         if(!group)
  33                 group = "default";
  34
  35         return g_key_file_get_string(config, group, key, NULL);
  36 }
  37
  38 /* false if key isn't already defined or value is invalid */
  39 gboolean set_option(gchar *key, gchar *value, gchar *group) {
  40
  41         if(!group)
  42                 group = "default";
  43
  44         if(!g_key_file_get_string(config, group, key, NULL))
  45                 return FALSE;
  46
  47         //TODO safteycheck value
  48         g_key_file_set_string(config, group, key, value);
  49         return TRUE;
  50 }
  51
  52 /* initial load/check */
  53 gboolean config_init() {
  54
  55         if(config)
  56                 return TRUE; //already init'd
  57
  58         config = g_key_file_new();
  59
  60         const gchar *config_path;
  61         GStatBuf *config_lstat;
  62
  63         config_path = "/etc/systemd_compat.conf";
  64
  65         /* does conf exist? */
  66         if(g_lstat(config_path, config_lstat)) {
  67
  68                 /* if not, can we write it */
  69                 if(g_access("/etc/", W_OK)) {
  70                         g_printf("%s\n", "no write permissions for /etc/! exiting..");
  71                         return FALSE;
  72                 }
  73
  74                 int config_descr;
  75                 config_descr = g_open(config_path, O_CREAT, 644);
  76
  77                 gchar *posix_hostname;
  78                 posix_hostname = g_malloc(255);
  79
  80                 gethostname(posix_hostname, 255);
  81
  82                 g_key_file_set_string(config, "hostnamed", "Hostname", posix_hostname);
  83                 g_key_file_set_string(config, "hostnamed", "PrettyHostname", "");
  84                 g_key_file_set_string(config, "hostnamed", "IconName", "Computer");
  85                 g_key_file_set_string(config, "hostnamed", "ChassisType", "laptop"); //TODO set these correctly
  86
  87                 if(!g_key_file_save_to_file(config, config_path, NULL)) {
  88                         g_printf("failed to write config to %s!\n", config_path);
  89                         g_free(posix_hostname);
  90                         return FALSE;
  91                 }
  92
  93                 g_printf("wrote config to %s\n", config_path);
  94
  95                 g_free(posix_hostname);
  96
  97                 return TRUE;
  98
  99         /* it does exist, read it */
 100         } else {
 101
 102                 if(!g_access(config_path, W_OK)) {
 103                         g_printf("%s\n", "no write permissions for /etc/! exiting..");
 104                         return FALSE;
 105                 } else if(g_key_file_load_from_file(config, config_path, G_KEY_FILE_KEEP_COMMENTS, NULL))
 106                         return TRUE;
 107
 108                 g_printf("could not read config at %s! exiting..", config_path);
 109                 return FALSE;
 110         }
 111 }