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author: Perberos <[email protected]> 2011-11-14 18:24:48 -0300
committer: Perberos <[email protected]> 2011-11-14 18:24:48 -0300
commit: 312ba610a1e98fc656fb58178227d7d45a64494e (patch)
tree: 54a3c2b6084c80e63fb0526c6e7b8e01627acbd7 /cpufreq/src/cpufreq-utils.c
download: mate-applets-312ba610a1e98fc656fb58178227d7d45a64494e.tar.bz2
mate-applets-312ba610a1e98fc656fb58178227d7d45a64494e.tar.xz
1 files changed, 311 insertions, 0 deletions
diff --git a/cpufreq/src/cpufreq-utils.c b/cpufreq/src/cpufreq-utils.c
new file mode 100644
index 00000000..47b80c1f
--- /dev/null
+++ b/cpufreq/src/cpufreq-utils.c
@@ -0,0 +1,311 @@
+/*
+ * MATE CPUFreq Applet
+ * Copyright (C) 2006 Carlos Garcia Campos <[email protected]>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Authors : Carlos Garc�a Campos <[email protected]>
+ */
+
+#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 <dbus/dbus-glib.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)
+{
+ DBusGProxy *proxy;
+ static DBusGConnection *system_bus = NULL;
+ GError *error = NULL;
+ gboolean result;
+
+ if (!system_bus) {
+ system_bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
+ if (!system_bus) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+
+ return FALSE;
+ }
+ }
+
+ proxy = dbus_g_proxy_new_for_name (system_bus,
+ "org.mate.CPUFreqSelector",
+ "/org/mate/cpufreq_selector/selector",
+ "org.mate.CPUFreqSelector");
+
+ if (!dbus_g_proxy_call (proxy, "CanSet", &error,
+ G_TYPE_INVALID,
+ G_TYPE_BOOLEAN, &result,
+ G_TYPE_INVALID)) {
+ g_warning ("Error calling org.mate.CPUFreqSelector.CanSet: %s", error->message);
+ g_error_free (error);
+ result = FALSE;
+ }
+
+ 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;
+}
author	Perberos <[email protected]>	2011-11-14 18:24:48 -0300
committer	Perberos <[email protected]>	2011-11-14 18:24:48 -0300
commit	312ba610a1e98fc656fb58178227d7d45a64494e (patch)
tree	54a3c2b6084c80e63fb0526c6e7b8e01627acbd7 /cpufreq/src/cpufreq-utils.c
download	mate-applets-312ba610a1e98fc656fb58178227d7d45a64494e.tar.bz2 mate-applets-312ba610a1e98fc656fb58178227d7d45a64494e.tar.xz