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/*
* Copyright (C) 2010-2011 Robert Ancell.
* Author: Robert Ancell <robert.ancell@canonical.com>
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2 or version 3 of the License.
* See http://www.gnu.org/copyleft/lgpl.html the full text of the license.
*/
#include <string.h>
#include "lightdm/system.h"
/**
* SECTION:system
* @title: System Information
* @short_description: Get system information
* @include: lightdm.h
*
* Helper functions to get system information.
*/
/**
* lightdm_get_hostname:
*
* Return value: The name of the host we are running on.
**/
const gchar *
lightdm_get_hostname (void)
{
return g_get_host_name ();
}
static gboolean os_release_loaded = FALSE;
static gchar *os_id = NULL;
static gchar *os_name = NULL;
static gchar *os_version = NULL;
static gchar *os_version_id = NULL;
static gchar *os_pretty_name = NULL;
static void
use_os_value (const gchar *name, const gchar *value)
{
if (strcmp (name, "ID") == 0)
os_id = g_strdup (value);
if (strcmp (name, "NAME") == 0)
os_name = g_strdup (value);
if (strcmp (name, "VERSION") == 0)
os_version = g_strdup (value);
if (strcmp (name, "VERSION_ID") == 0)
os_version_id = g_strdup (value);
if (strcmp (name, "PRETTY_NAME") == 0)
os_pretty_name = g_strdup (value);
}
static void
load_os_release (void)
{
if (os_release_loaded)
return;
g_autofree gchar *data = NULL;
if (!g_file_get_contents ("/etc/os-release", &data, NULL, NULL))
return;
g_auto(GStrv) lines = g_strsplit (data, "\n", -1);
for (guint i = 0; lines[i] != NULL; i++)
{
g_auto(GStrv) tokens = g_strsplit (lines[i], "=", 2);
if (tokens[0] != NULL && tokens[1] != NULL)
{
const gchar *name = g_strstrip (tokens[0]);
gchar *value = g_strstrip (tokens[1]);
size_t value_length = strlen (value);
if (value_length > 1 && value[0] == '\"' && value[value_length - 1] == '\"')
{
value[value_length - 1] = '\0';
value++;
use_os_value (name, value);
}
}
}
os_release_loaded = TRUE;
}
/**
* lightdm_get_os_id:
*
* Get a word describing the OS, suitable for checking which OS the greeter is running on.
* e.g. "ubuntu"
*
* Return value: (nullable): a string (ID variable from /etc/os-release) or %NULL if not set.
**/
const gchar *
lightdm_get_os_id (void)
{
load_os_release ();
return os_id;
}
/**
* lightdm_get_os_name:
*
* Get a line of text describing the OS without version information, suitable for presentation to the user.
* e.g. "Ubuntu"
*
* Return value: (nullable): a string (NAME variable from /etc/os-release) or %NULL if not set.
**/
const gchar *
lightdm_get_os_name (void)
{
load_os_release ();
return os_name;
}
/**
* lightdm_get_os_pretty_name:
*
* Get a line of text describing the OS, suitable for presentation to the user.
* e.g. "Ubuntu 16.04.1 LTS"
*
* Return value: (nullable): a string (PRETTY_NAME variable from /etc/os-release) or %NULL if not set.
**/
const gchar *
lightdm_get_os_pretty_name (void)
{
load_os_release ();
return os_pretty_name;
}
/**
* lightdm_get_os_version:
*
* Get a line of text describing the OS version, suitable for presentation to the user.
* e.g. "16.04.1 LTS (Xenial Xapus)"
*
* Return value: (nullable): a string (VERSION variable from /etc/os-release) or %NULL if not set.
**/
const gchar *
lightdm_get_os_version (void)
{
load_os_release ();
return os_version;
}
/**
* lightdm_get_os_version_id:
*
* Get a word descibing the OS version, suitable for checking which version of the OS this greeter is running on.
* e.g. "16.04"
*
* Return value: (nullable): a string (VERSION_ID variable from /etc/os-release) or %NULL if not set.
**/
const gchar *
lightdm_get_os_version_id (void)
{
load_os_release ();
return os_version_id;
}
/**
* lightdm_get_motd:
*
* Get a system message that should be presented to the user.
* e.g. "Welcome to Yoyodyne"
*
* Return value: (nullable): a string (the contents of /etc/motd) or %NULL if not set.
**/
gchar *
lightdm_get_motd (void)
{
gchar *data = NULL;
g_file_get_contents ("/etc/motd", &data, NULL, NULL);
return data;
}
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