src/config.c

   1 #include <unistd.h>
   2 #include <fcntl.h>
   3 #include <gio/gio.h>
   4
   5 static GKeyFile *config;
   6 static int config_descr;
   7
   8 static const gchar *CONFIG_KEYS[] = {
   9         "PrettyHostname",
  10         "IconName",
  11         "ChassisType"
  12 };
  13
  14 /* NULL if key doesn't exist */
  15 gchar *get_option(gchar *key, gchar *group) {
  16
  17         if(!group)
  18                 group = "default";
  19
  20         return g_key_file_get_string(config, group, key, NULL);
  21 }
  22
  23 /* false if key isn't already defined or value is invalid */
  24 gboolean set_option(gchar *key, gchar *value, gchar *group) {
  25
  26         if(!group)
  27                 group = "default";
  28
  29         if(!g_key_file_get_string(config, group, key, NULL))
  30                 return FALSE;
  31
  32         //TODO safteycheck value
  33         g_key_file_set_string(config, group, key, value);
  34         return TRUE;
  35 }
  36
  37 /* initial load/check */
  38 gboolean config_init() {
  39
  40         if(config)
  41                 return TRUE; //already init'd
  42
  43         config = g_key_file_new();
  44
  45         const gchar *config_path;
  46         GStatBuf *config_lstat;
  47
  48         config_path = "/etc/systemd_compat.conf";
  49
  50         /* does conf exist? */
  51         if(g_lstat(config_path, config_lstat)) {
  52
  53                 /* if not, can we write it */
  54                 if(g_access("/etc/", W_OK)) {
  55                         g_printf("%s\n", "no write permissions for /etc/! exiting..");
  56                         return FALSE;
  57                 }
  58
  59                 config_descr = g_open(config_path, O_CREAT, 644);
  60
  61                 gchar *posix_hostname;
  62                 posix_hostname = g_malloc(255);
  63
  64                 gethostname(posix_hostname, 255);
  65
  66                 g_key_file_set_string(config, "hostnamed", "Hostname", posix_hostname);
  67                 g_key_file_set_string(config, "hostnamed", "PrettyHostname", "");
  68                 g_key_file_set_string(config, "hostnamed", "IconName", "Computer");
  69                 g_key_file_set_string(config, "hostnamed", "ChassisType", "laptop"); //TODO set these correctly
  70
  71                 if(!g_key_file_save_to_file(config, config_path, NULL)) {
  72                         g_printf("failed to write config to %s!\n", config_path);
  73                         g_free(posix_hostname);
  74                         return FALSE;
  75                 }
  76
  77                 g_printf("wrote config to %s\n", config_path);
  78
  79                 g_free(posix_hostname);
  80
  81                 return TRUE;
  82
  83         /* it does exist, read it */
  84         } else {
  85
  86                 if(!g_access(config_path, W_OK)) {
  87                         g_printf("%s\n", "no write permissions for /etc/! exiting..");
  88                         return FALSE;
  89                 } else if(g_key_file_load_from_file(config, config_path, G_KEY_FILE_KEEP_COMMENTS, NULL)) {
  90                         config_descr = g_open(config_path, O_RDWR, 644);
  91                         return TRUE;
  92                 }
  93
  94                 g_printf("could not read config at %s! exiting..", config_path);
  95                 return FALSE;
  96         }
  97 }
  98
  99 void clean_config() {
 100
 101         if(config)
 102                 g_free(config);
 103
 104         if(config_descr)
 105                 g_close(config_descr, NULL);
 106
 107 }