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 #include "config.h"
  21
  22 static GKeyFile *config;
  23 static int config_descr;
  24 static gchar *data_dir;
  25
  26 /* NULL if key doesn't exist */
  27 gchar *get_option(gchar *key, gchar *group) {
  28
  29     if(!group)
  30         group = "default";
  31
  32     return g_key_file_get_string(config, group, key, NULL);
  33 }
  34
  35 /* false if key isn't already defined or value is invalid */
  36 gboolean set_option(gchar *key, gchar *value, gchar *group) {
  37
  38     if(!group)
  39         group = "default";
  40
  41     if(!g_key_file_get_string(config, group, key, NULL))
  42         return FALSE;
  43
  44     //TODO safteycheck value
  45     g_key_file_set_string(config, group, key, value);
  46     return TRUE;
  47 }
  48
  49 /* initial load/check */
  50 gboolean config_init() {
  51
  52     config = g_key_file_new();
  53
  54     const gchar *config_path;
  55     GStatBuf *config_lstat;
  56         int config_lstat_ret;
  57
  58     config_path = "/etc/systemd_compat.conf";
  59         config_lstat_ret = g_lstat(config_path, config_lstat);
  60
  61     /* does conf exist? */
  62     if(config_lstat_ret) {
  63
  64         /* if not, can we write to where it should be? */
  65         if(g_access("/etc/", W_OK)) {
  66             g_printf("%s\n", "no write permissions for /etc/! exiting..");
  67             return FALSE;
  68         }
  69
  70         int config_descr;
  71         config_descr = g_open(config_path, O_CREAT, 644);
  72
  73         gchar *posix_hostname;
  74         posix_hostname = g_malloc(HOST_NAME_MAX);
  75
  76         gethostname(posix_hostname, HOST_NAME_MAX);
  77
  78         g_key_file_set_string(config, "hostnamed", "Hostname", posix_hostname);
  79         g_key_file_set_string(config, "hostnamed", "PrettyHostname", "");
  80         g_key_file_set_string(config, "hostnamed", "IconName", "Computer");
  81         g_key_file_set_string(config, "hostnamed", "ChassisType", "laptop"); //TODO set these correctly
  82
  83         if(!g_key_file_save_to_file(config, config_path, NULL)) {
  84             g_printf("failed to write config to %s!\n", config_path);
  85             g_free(posix_hostname);
  86             return FALSE;
  87         }
  88
  89         g_printf("wrote config to %s\n", config_path);
  90
  91         g_free(posix_hostname);
  92
  93         return TRUE;
  94
  95     /* it does exist, read it */
  96     } else {
  97
  98         if(g_access(config_path, W_OK)) {
  99             g_printf("%s\n", "no write permissions for /etc/! exiting..");
 100             return FALSE;
 101         } else if(g_key_file_load_from_file(config, config_path, G_KEY_FILE_KEEP_COMMENTS, NULL))
 102             return TRUE;
 103
 104         g_printf("could not read config at %s! exiting..", config_path);
 105         return FALSE;
 106     }
 107 }
 108
 109 gboolean init_xml() {
 110
 111         const gchar * const *data_dir_prefix;
 112         int xml_lstat_ret;
 113         GStatBuf *xml_lstat;
 114
 115         data_dir_prefix = g_get_system_data_dirs();
 116         data_dir = g_strconcat(data_dir_prefix[0], "systemd_compat", NULL);
 117
 118         xml_lstat_ret = g_lstat(data_dir, xml_lstat);
 119
 120         /* does xml dir exist? */
 121         if(xml_lstat_ret) {
 122
 123                 /* if not, can we write to where it should be? */
 124                 if(g_access(data_dir_prefix[0], W_OK)) {
 125                         g_printf("no write permissions for %s! exiting...\n", data_dir_prefix[0]);
 126                         return FALSE;
 127                 }
 128
 129                 g_printf("creating xml data directory %s...\n", data_dir);
 130
 131                 if(g_mkdir(data_dir, 644) || g_access) {
 132                         g_printf("failed to create dir %s...\n", data_dir);
 133                         return FALSE;
 134                 }
 135
 136                 /* read in xml files from conf/ */
 137                 if(!read_xml_from_installconf()) {
 138                         g_printf("failed to read xml configs in conf/...\n");
 139                         return FALSE;
 140                 }
 141
 142                 /* write our configs to system data dir */
 143                 if(!populate_xml_data_dir()) {
 144                         g_printf("failed to write xml configs to %s...\n", data_dir);
 145                         return FALSE;
 146                 }
 147
 148                 /* get descriptors from freshly-installed configs */
 149                 if(!set_xml_descriptors()) {
 150                         g_printf("failed to fopen xml configs...\n");
 151                         return FALSE;
 152                 }
 153
 154                 return TRUE;
 155
 156         /* it does exist, read it */
 157         } else {
 158
 159                 if(!set_xml_descriptors()) {
 160                         g_printf("failed to fopen xml configs...\n");
 161                         return FALSE;
 162                 }
 163
 164                 return TRUE;
 165         }
 166 }
 167
 168 void clean_config() {
 169
 170         //TODO g_ptr_array all of this
 171         g_free(config);
 172         g_free(data_dir);
 173         g_close(config_descr, NULL);
 174 }