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 static int config_descr;
  23
  24 static gchar *data_dir;
  25
  26 static int hostnamed_ispect_xml_descr, hostnamed_dbus_xml_descr;
  27 static int localed_ispect_xml_descr, localed_dbus_xml_descr;
  28 static int timedated_ispect_xml_descr, timedated_dbus_xml_descr;
  29 static int logind_ispect_xml_descr, logind_dbus_xml_descr;
  30
  31 /*TODO depending on builtin xml flag, these should be matched to checksums */
  32 static gchar **hostnamed_ispect_xml, hostnamed_dbus_xml;
  33 static gchar **localed_ispect_xml, localed_dbus_xml;
  34 static gchar **timedated_ispect_xml, timedated_dbus_xml;
  35 static gchar **logind_ispect_xml, logind_dbus_xml;
  36
  37 static const gchar *CONFIG_KEYS[] = {
  38     "PrettyHostname",
  39     "IconName",
  40     "ChassisType"
  41 };
  42
  43 /* NULL if key doesn't exist */
  44 gchar *get_option(gchar *key, gchar *group) {
  45
  46     if(!group)
  47         group = "default";
  48
  49     return g_key_file_get_string(config, group, key, NULL);
  50 }
  51
  52 /* false if key isn't already defined or value is invalid */
  53 gboolean set_option(gchar *key, gchar *value, gchar *group) {
  54
  55     if(!group)
  56         group = "default";
  57
  58     if(!g_key_file_get_string(config, group, key, NULL))
  59         return FALSE;
  60
  61     //TODO safteycheck value
  62     g_key_file_set_string(config, group, key, value);
  63     return TRUE;
  64 }
  65
  66 /* initial load/check */
  67 gboolean config_init() {
  68
  69     if(config)
  70         return TRUE; //already init'd
  71
  72     config = g_key_file_new();
  73
  74     const gchar *config_path;
  75     GStatBuf *config_lstat;
  76
  77     config_path = "/etc/systemd_compat.conf";
  78
  79     /* does conf exist? */
  80     if(g_lstat(config_path, config_lstat)) {
  81
  82         /* if not, can we write it */
  83         if(g_access("/etc/", W_OK)) {
  84             g_printf("%s\n", "no write permissions for /etc/! exiting..");
  85             return FALSE;
  86         }
  87
  88         int config_descr;
  89         config_descr = g_open(config_path, O_CREAT, 644);
  90
  91         gchar *posix_hostname;
  92         posix_hostname = g_malloc(HOST_NAME_MAX);
  93
  94         gethostname(posix_hostname, HOST_NAME_MAX);
  95
  96         g_key_file_set_string(config, "hostnamed", "Hostname", posix_hostname);
  97         g_key_file_set_string(config, "hostnamed", "PrettyHostname", "");
  98         g_key_file_set_string(config, "hostnamed", "IconName", "Computer");
  99         g_key_file_set_string(config, "hostnamed", "ChassisType", "laptop"); //TODO set these correctly
 100
 101         if(!g_key_file_save_to_file(config, config_path, NULL)) {
 102             g_printf("failed to write config to %s!\n", config_path);
 103             g_free(posix_hostname);
 104             return FALSE;
 105         }
 106
 107         g_printf("wrote config to %s\n", config_path);
 108
 109         g_free(posix_hostname);
 110
 111         return TRUE;
 112
 113     /* it does exist, read it */
 114     } else {
 115
 116         if(!g_access(config_path, W_OK)) {
 117             g_printf("%s\n", "no write permissions for /etc/! exiting..");
 118             return FALSE;
 119         } else if(g_key_file_load_from_file(config, config_path, G_KEY_FILE_KEEP_COMMENTS, NULL))
 120             return TRUE;
 121
 122         g_printf("could not read config at %s! exiting..", config_path);
 123         return FALSE;
 124     }
 125 }
 126 }