/*
* MATE CPUFreq Applet
* Copyright (C) 2006 Carlos Garcia Campos <carlosgc@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Authors : Carlos Garc�a Campos <carlosgc@gnome.org>
*/
#include <config.h>
#include <glib.h>
#include <gtk/gtk.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "cpufreq-utils.h"
#ifdef HAVE_POLKIT
#include <gio/gio.h>
#endif /* HAVE_POLKIT */
guint
cpufreq_utils_get_n_cpus (void)
{
gint mcpu = -1;
gchar *file = NULL;
static guint n_cpus = 0;
if (n_cpus > 0)
return n_cpus;
do {
if (file)
g_free (file);
mcpu ++;
file = g_strdup_printf ("/sys/devices/system/cpu/cpu%d", mcpu);
} while (g_file_test (file, G_FILE_TEST_EXISTS));
g_free (file);
if (mcpu >= 0) {
n_cpus = (guint)mcpu;
return mcpu;
}
mcpu = -1;
file = NULL;
do {
if (file)
g_free (file);
mcpu ++;
file = g_strdup_printf ("/proc/sys/cpu/%d", mcpu);
} while (g_file_test (file, G_FILE_TEST_EXISTS));
g_free (file);
if (mcpu >= 0) {
n_cpus = (guint)mcpu;
return mcpu;
}
n_cpus = 1;
return 1;
}
void
cpufreq_utils_display_error (const gchar *message,
const gchar *secondary)
{
GtkWidget *dialog;
g_return_if_fail (message != NULL);
dialog = gtk_message_dialog_new (NULL,
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_OK,
"%s", message);
if (secondary) {
gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
"%s", secondary);
}
gtk_window_set_title (GTK_WINDOW (dialog), ""); /* as per HIG */
gtk_window_set_skip_taskbar_hint (GTK_WINDOW (dialog), TRUE);
g_signal_connect (G_OBJECT (dialog),
"response",
G_CALLBACK (gtk_widget_destroy), NULL);
gtk_widget_show (dialog);
}
#ifdef HAVE_POLKIT
#define CACHE_VALIDITY_SEC 2
static gboolean
selector_is_available (void)
{
GDBusProxy *proxy;
static GDBusConnection *system_bus = NULL;
GError *error = NULL;
GVariant *reply;
gboolean result;
if (!system_bus) {
system_bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error);
if (!system_bus) {
g_warning ("%s", error->message);
g_error_free (error);
return FALSE;
}
}
proxy = g_dbus_proxy_new_sync (system_bus,
G_DBUS_PROXY_FLAGS_NONE,
NULL,
"org.mate.CPUFreqSelector",
"/org/mate/cpufreq_selector/selector",
"org.mate.CPUFreqSelector",
NULL,
&error);
if (!proxy) {
g_warning ("%s", error->message);
g_error_free (error);
return FALSE;
}
reply = g_dbus_proxy_call_sync (proxy,
"CanSet",
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
&error);
if (!reply) {
g_warning ("Error calling org.mate.CPUFreqSelector.CanSet: %s", error->message);
g_error_free (error);
result = FALSE;
} else {
g_variant_get (reply, "(b)", &result);
g_variant_unref (reply);
}
g_object_unref (proxy);
return result;
}
gboolean
cpufreq_utils_selector_is_available (void)
{
static gboolean cache = FALSE;
static time_t last_refreshed = 0;
time_t now;
time (&now);
if (ABS (now - last_refreshed) > CACHE_VALIDITY_SEC) {
cache = selector_is_available ();
last_refreshed = now;
}
return cache;
}
#else /* !HAVE_POLKIT */
gboolean
cpufreq_utils_selector_is_available (void)
{
struct stat *info;
gchar *path = NULL;
path = g_find_program_in_path ("cpufreq-selector");
if (!path)
return FALSE;
if (geteuid () == 0) {
g_free (path);
return TRUE;
}
info = (struct stat *) g_malloc (sizeof (struct stat));
if ((lstat (path, info)) != -1) {
if ((info->st_mode & S_ISUID) && (info->st_uid == 0)) {
g_free (info);
g_free (path);
return TRUE;
}
}
g_free (info);
g_free (path);
return FALSE;
}
#endif /* HAVE_POLKIT_MATE */
gchar *
cpufreq_utils_get_frequency_label (guint freq)
{
gint divisor;
if (freq > 999999) /* freq (kHz) */
divisor = (1000 * 1000);
else
divisor = 1000;
if (((freq % divisor) == 0) || divisor == 1000) /* integer */
return g_strdup_printf ("%d", freq / divisor);
else /* float */
return g_strdup_printf ("%3.2f", ((gfloat)freq / divisor));
}
gchar *
cpufreq_utils_get_frequency_unit (guint freq)
{
if (freq > 999999) /* freq (kHz) */
return g_strdup ("GHz");
else
return g_strdup ("MHz");
}
gboolean
cpufreq_utils_governor_is_automatic (const gchar *governor)
{
g_return_val_if_fail (governor != NULL, FALSE);
if (g_ascii_strcasecmp (governor, "userspace") == 0)
return FALSE;
return TRUE;
}
gboolean
cpufreq_file_get_contents (const gchar *filename,
gchar **contents,
gsize *length,
GError **error)
{
gint fd;
GString *buffer = NULL;
gchar *display_filename;
g_return_val_if_fail (filename != NULL, FALSE);
g_return_val_if_fail (contents != NULL, FALSE);
display_filename = g_filename_display_name (filename);
*contents = NULL;
if (length)
*length = 0;
fd = open (filename, O_RDONLY);
if (fd < 0) {
gint save_errno = errno;
g_set_error (error,
G_FILE_ERROR,
g_file_error_from_errno (save_errno),
"Failed to open file '%s': %s",
display_filename,
g_strerror (save_errno));
g_free (display_filename);
return FALSE;
}
while (TRUE) {
ssize_t bytes_read;
gchar buf[1024];
bytes_read = read (fd, buf, sizeof (buf));
if (bytes_read < 0) { /* Error */
if (errno != EINTR) {
gint save_errno = errno;
g_set_error (error,
G_FILE_ERROR,
g_file_error_from_errno (save_errno),
"Failed to read from file '%s': %s",
display_filename,
g_strerror (save_errno));
if (buffer)
g_string_free (buffer, TRUE);
g_free (display_filename);
close (fd);
return FALSE;
}
}
else if (bytes_read == 0) { /* EOF */
break;
}
else {
if (!buffer)
buffer = g_string_sized_new (bytes_read);
buffer = g_string_append_len (buffer, buf, bytes_read);
}
}
g_free (display_filename);
if (buffer) {
*contents = g_string_free (buffer, FALSE);
if (length)
*length = strlen (*contents);
}
close (fd);
return TRUE;
}