merge license, hostname buffer changes from master branch

[systembsd.git] / src / config.c

/*
 * Copyright (c) 2014 Ian Sutton <ian@kremlin.cc>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <unistd.h>
#include <fcntl.h>
#include <gio/gio.h>

static GKeyFile *config;
static int config_descr;

static gchar *data_dir;

static int hostnamed_ispect_xml_descr, hostnamed_dbus_xml_descr;
static int localed_ispect_xml_descr, localed_dbus_xml_descr;
static int timedated_ispect_xml_descr, timedated_dbus_xml_descr;
static int logind_ispect_xml_descr, logind_dbus_xml_descr;

/*TODO depending on builtin xml flag, these should be matched to checksums */
static gchar **hostnamed_ispect_xml, hostnamed_dbus_xml;
static gchar **localed_ispect_xml, localed_dbus_xml;
static gchar **timedated_ispect_xml, timedated_dbus_xml;
static gchar **logind_ispect_xml, logind_dbus_xml;

static const gchar *CONFIG_KEYS[] = {
    "PrettyHostname",
    "IconName",
    "ChassisType"
};

/* NULL if key doesn't exist */
gchar *get_option(gchar *key, gchar *group) {

    if(!group)
        group = "default";

    return g_key_file_get_string(config, group, key, NULL);
}

/* false if key isn't already defined or value is invalid */
gboolean set_option(gchar *key, gchar *value, gchar *group) {

    if(!group)
        group = "default";

    if(!g_key_file_get_string(config, group, key, NULL))
        return FALSE;

    //TODO safteycheck value
    g_key_file_set_string(config, group, key, value);
    return TRUE;
}

/* initial load/check */
gboolean config_init() {

    if(config)
        return TRUE; //already init'd

    config = g_key_file_new();
    
    const gchar *config_path;
    GStatBuf *config_lstat;

    config_path = "/etc/systemd_compat.conf";

    /* does conf exist? */
    if(g_lstat(config_path, config_lstat)) {

        /* if not, can we write it */
        if(g_access("/etc/", W_OK)) {
            g_printf("%s\n", "no write permissions for /etc/! exiting..");
            return FALSE;
        }

        int config_descr;
        config_descr = g_open(config_path, O_CREAT, 644);

        gchar *posix_hostname;
        posix_hostname = g_malloc(HOST_NAME_MAX); 

        gethostname(posix_hostname, HOST_NAME_MAX);

        g_key_file_set_string(config, "hostnamed", "Hostname", posix_hostname);
        g_key_file_set_string(config, "hostnamed", "PrettyHostname", "");
        g_key_file_set_string(config, "hostnamed", "IconName", "Computer"); 
        g_key_file_set_string(config, "hostnamed", "ChassisType", "laptop"); //TODO set these correctly

        if(!g_key_file_save_to_file(config, config_path, NULL)) {
            g_printf("failed to write config to %s!\n", config_path);
            g_free(posix_hostname);
            return FALSE;
        }

        g_printf("wrote config to %s\n", config_path);

        g_free(posix_hostname);

        return TRUE;

    /* it does exist, read it */
    } else {

        if(!g_access(config_path, W_OK)) {
            g_printf("%s\n", "no write permissions for /etc/! exiting..");
            return FALSE;
        } else if(g_key_file_load_from_file(config, config_path, G_KEY_FILE_KEEP_COMMENTS, NULL))
            return TRUE;

        g_printf("could not read config at %s! exiting..", config_path);
        return FALSE;
    }
}
}