Bug Summary

File:cpufreq/src/cpufreq-utils.c
Warning:line 62, column 10
This statement is never executed

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name cpufreq-utils.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/rootdir/cpufreq/src -fcoverage-compilation-dir=/rootdir/cpufreq/src -resource-dir /usr/lib/llvm-21/lib/clang/21 -D HAVE_CONFIG_H -I . -I ../.. -D CPUFREQ_MENU_UI_DIR="/usr/share/cafe/ui" -I /usr/include/cafe-panel-4.0/libcafe-panel-applet -I /usr/include/glib-2.0 -I /usr/lib/x86_64-linux-gnu/glib-2.0/include -I /usr/include/sysprof-6 -I /usr/include/libmount -I /usr/include/blkid -I /usr/include/ctk-3.0 -I /usr/include/pango-1.0 -I /usr/include/harfbuzz -I /usr/include/freetype2 -I /usr/include/libpng16 -I /usr/include/fribidi -I /usr/include/cairo -I /usr/include/pixman-1 -I /usr/include/gdk-pixbuf-2.0 -I /usr/include/glycin-2 -I /usr/include/gio-unix-2.0 -I /usr/include/atk-1.0 -I /usr/include/at-spi2-atk/2.0 -I /usr/include/at-spi-2.0 -I /usr/include/dbus-1.0 -I /usr/lib/x86_64-linux-gnu/dbus-1.0/include -I /usr/include/dbus-1.0 -I /usr/lib/x86_64-linux-gnu/dbus-1.0/include -I /usr/include/glib-2.0 -I /usr/lib/x86_64-linux-gnu/glib-2.0/include -I /usr/include/sysprof-6 -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/15/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -analyzer-checker deadcode.DeadStores -analyzer-checker security.ArrayBound -analyzer-checker unix.cstring.NotNullTerminated -analyzer-checker alpha.deadcode.UnreachableCode -analyzer-checker alpha.core.CastToStruct -analyzer-checker alpha.security.ReturnPtrRange -analyzer-checker alpha.unix.SimpleStream -analyzer-checker alpha.unix.cstring.BufferOverlap -analyzer-checker alpha.unix.cstring.OutOfBounds -analyzer-checker alpha.core.FixedAddr -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /rootdir/html-report/2026-02-26-094826-83678-1 -x c cpufreq-utils.c
1/*
2 * CAFE CPUFreq Applet
3 * Copyright (C) 2006 Carlos Garcia Campos <carlosgc@gnome.org>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public
16 * License along with this library; if not, write to the Free
17 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
18 *
19 * Authors : Carlos García Campos <carlosgc@gnome.org>
20 */
21
22#include <config.h>
23
24#include <glib.h>
25#include <ctk/ctk.h>
26#include <sys/types.h>
27#include <sys/stat.h>
28#include <fcntl.h>
29#include <unistd.h>
30#include <string.h>
31#include <errno(*__errno_location ()).h>
32
33#include "cpufreq-utils.h"
34
35#ifdef HAVE_POLKIT1
36#include <dbus/dbus-glib.h>
37#endif /* HAVE_POLKIT */
38
39guint
40cpufreq_utils_get_n_cpus (void)
41{
42 gint mcpu = -1;
43 gchar *file = NULL((void*)0);
44 static guint n_cpus = 0;
45
46 if (n_cpus > 0)
47 return n_cpus;
48
49 do {
50 if (file)
51 g_free (file);
52 mcpu ++;
53 file = g_strdup_printf ("/sys/devices/system/cpu/cpu%d", mcpu);
54 } while (g_file_test (file, G_FILE_TEST_EXISTS));
55 g_free (file);
56
57 if (mcpu >= 0) {
58 n_cpus = (guint)mcpu;
59 return mcpu;
60 }
61
62 mcpu = -1;
This statement is never executed
63 file = NULL((void*)0);
64 do {
65 if (file)
66 g_free (file);
67 mcpu ++;
68 file = g_strdup_printf ("/proc/sys/cpu/%d", mcpu);
69 } while (g_file_test (file, G_FILE_TEST_EXISTS));
70 g_free (file);
71
72 if (mcpu >= 0) {
73 n_cpus = (guint)mcpu;
74 return mcpu;
75 }
76
77 n_cpus = 1;
78
79 return 1;
80}
81
82void
83cpufreq_utils_display_error (const gchar *message,
84 const gchar *secondary)
85{
86 CtkWidget *dialog;
87
88 g_return_if_fail (message != NULL)do { if ((message != ((void*)0))) { } else { g_return_if_fail_warning
(((gchar*) 0), ((const char*) (__func__)), "message != NULL"
); return; } } while (0);
89
90 dialog = ctk_message_dialog_new (NULL((void*)0),
91 CTK_DIALOG_DESTROY_WITH_PARENT,
92 CTK_MESSAGE_ERROR,
93 CTK_BUTTONS_OK,
94 "%s", message);
95 if (secondary) {
96 ctk_message_dialog_format_secondary_text (CTK_MESSAGE_DIALOG (dialog)((((CtkMessageDialog*) (void *) g_type_check_instance_cast ((
GTypeInstance*) ((dialog)), ((ctk_message_dialog_get_type ())
))))),
97 "%s", secondary);
98 }
99
100 ctk_window_set_title (CTK_WINDOW (dialog)((((CtkWindow*) (void *) g_type_check_instance_cast ((GTypeInstance
*) ((dialog)), ((ctk_window_get_type ())))))), ""); /* as per HIG */
101 ctk_window_set_skip_taskbar_hint (CTK_WINDOW (dialog)((((CtkWindow*) (void *) g_type_check_instance_cast ((GTypeInstance
*) ((dialog)), ((ctk_window_get_type ())))))), TRUE(!(0)));
102 g_signal_connect (G_OBJECT (dialog),g_signal_connect_data ((((((GObject*) (void *) g_type_check_instance_cast
((GTypeInstance*) ((dialog)), (((GType) ((20) << (2)))
)))))), ("response"), (((GCallback) (ctk_widget_destroy))), (
((void*)0)), ((void*)0), (GConnectFlags) 0)
103 "response",g_signal_connect_data ((((((GObject*) (void *) g_type_check_instance_cast
((GTypeInstance*) ((dialog)), (((GType) ((20) << (2)))
)))))), ("response"), (((GCallback) (ctk_widget_destroy))), (
((void*)0)), ((void*)0), (GConnectFlags) 0)
104 G_CALLBACK (ctk_widget_destroy), NULL)g_signal_connect_data ((((((GObject*) (void *) g_type_check_instance_cast
((GTypeInstance*) ((dialog)), (((GType) ((20) << (2)))
)))))), ("response"), (((GCallback) (ctk_widget_destroy))), (
((void*)0)), ((void*)0), (GConnectFlags) 0);
105 ctk_widget_show (dialog);
106}
107
108#ifdef HAVE_POLKIT1
109#define CACHE_VALIDITY_SEC2 2
110
111static gboolean
112selector_is_available (void)
113{
114 DBusGProxy *proxy;
115 static DBusGConnection *system_bus = NULL((void*)0);
116 GError *error = NULL((void*)0);
117 gboolean result;
118
119 if (!system_bus) {
120 system_bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
121 if (!system_bus) {
122 g_warning ("%s", error->message);
123 g_error_free (error);
124
125 return FALSE(0);
126 }
127 }
128
129 proxy = dbus_g_proxy_new_for_name (system_bus,
130 "org.cafe.CPUFreqSelector",
131 "/org/cafe/cpufreq_selector/selector",
132 "org.cafe.CPUFreqSelector");
133
134 if (!dbus_g_proxy_call (proxy, "CanSet", &error,
135 G_TYPE_INVALID((GType) ((0) << (2))),
136 G_TYPE_BOOLEAN((GType) ((5) << (2))), &result,
137 G_TYPE_INVALID((GType) ((0) << (2))))) {
138 g_warning ("Error calling org.cafe.CPUFreqSelector.CanSet: %s", error->message);
139 g_error_free (error);
140 result = FALSE(0);
141 }
142
143 g_object_unref (proxy);
144
145 return result;
146}
147
148gboolean
149cpufreq_utils_selector_is_available (void)
150{
151 static gboolean cache = FALSE(0);
152 static time_t last_refreshed = 0;
153 time_t now;
154
155 time (&now);
156 if (ABS (now - last_refreshed)(((now - last_refreshed) < 0) ? -(now - last_refreshed) : (
now - last_refreshed)) > CACHE_VALIDITY_SEC2) {
157 cache = selector_is_available ();
158 last_refreshed = now;
159 }
160
161 return cache;
162}
163#else /* !HAVE_POLKIT */
164gboolean
165cpufreq_utils_selector_is_available (void)
166{
167 struct stat *info;
168 gchar *path = NULL((void*)0);
169
170 path = g_find_program_in_path ("cpufreq-selector");
171 if (!path)
172 return FALSE(0);
173
174 if (geteuid () == 0) {
175 g_free (path);
176 return TRUE(!(0));
177 }
178
179 info = (struct stat *) g_malloc (sizeof (struct stat));
180
181 if ((lstat (path, info)) != -1) {
182 if ((info->st_mode & S_ISUID04000) && (info->st_uid == 0)) {
183 g_free (info);
184 g_free (path);
185
186 return TRUE(!(0));
187 }
188 }
189
190 g_free (info);
191 g_free (path);
192
193 return FALSE(0);
194}
195#endif /* HAVE_POLKIT_CAFE */
196
197gchar *
198cpufreq_utils_get_frequency_label (guint freq)
199{
200 gint divisor;
201
202 if (freq > 999999) /* freq (kHz) */
203 divisor = (1000 * 1000);
204 else
205 divisor = 1000;
206
207 if (((freq % divisor) == 0) || divisor == 1000) /* integer */
208 return g_strdup_printf ("%d", freq / divisor);
209 else /* float */
210 return g_strdup_printf ("%3.2f", ((gfloat)freq / divisor));
211}
212
213gchar *
214cpufreq_utils_get_frequency_unit (guint freq)
215{
216 if (freq > 999999) /* freq (kHz) */
217 return g_strdup ("GHz")g_strdup_inline ("GHz");
218 else
219 return g_strdup ("MHz")g_strdup_inline ("MHz");
220}
221
222gboolean
223cpufreq_utils_governor_is_automatic (const gchar *governor)
224{
225 g_return_val_if_fail (governor != NULL, FALSE)do { if ((governor != ((void*)0))) { } else { g_return_if_fail_warning
(((gchar*) 0), ((const char*) (__func__)), "governor != NULL"
); return ((0)); } } while (0);
226
227 if (g_ascii_strcasecmp (governor, "userspace") == 0)
228 return FALSE(0);
229
230 return TRUE(!(0));
231}
232
233gboolean
234cpufreq_file_get_contents (const gchar *filename,
235 gchar **contents,
236 gsize *length,
237 GError **error)
238{
239 gint fd;
240 GString *buffer = NULL((void*)0);
241 gchar *display_filename;
242
243 g_return_val_if_fail (filename != NULL, FALSE)do { if ((filename != ((void*)0))) { } else { g_return_if_fail_warning
(((gchar*) 0), ((const char*) (__func__)), "filename != NULL"
); return ((0)); } } while (0);
244 g_return_val_if_fail (contents != NULL, FALSE)do { if ((contents != ((void*)0))) { } else { g_return_if_fail_warning
(((gchar*) 0), ((const char*) (__func__)), "contents != NULL"
); return ((0)); } } while (0);
245
246 display_filename = g_filename_display_name (filename);
247
248 *contents = NULL((void*)0);
249 if (length)
250 *length = 0;
251
252 fd = open (filename, O_RDONLY00);
253 if (fd < 0) {
254 gint save_errno = errno(*__errno_location ());
255
256 g_set_error (error,
257 G_FILE_ERRORg_file_error_quark (),
258 g_file_error_from_errno (save_errno),
259 "Failed to open file '%s': %s",
260 display_filename,
261 g_strerror (save_errno));
262 g_free (display_filename);
263
264 return FALSE(0);
265 }
266
267 while (TRUE(!(0))) {
268 ssize_t bytes_read;
269 gchar buf[1024];
270
271 bytes_read = read (fd, buf, sizeof (buf));
272 if (bytes_read < 0) { /* Error */
273 if (errno(*__errno_location ()) != EINTR4) {
274 gint save_errno = errno(*__errno_location ());
275
276 g_set_error (error,
277 G_FILE_ERRORg_file_error_quark (),
278 g_file_error_from_errno (save_errno),
279 "Failed to read from file '%s': %s",
280 display_filename,
281 g_strerror (save_errno));
282
283 if (buffer)
284 g_string_free (buffer, TRUE)(__builtin_constant_p ((!(0))) ? (((!(0))) ? (g_string_free) (
(buffer), ((!(0)))) : g_string_free_and_steal (buffer)) : (g_string_free
) ((buffer), ((!(0)))));
285
286 g_free (display_filename);
287 close (fd);
288
289 return FALSE(0);
290 }
291 } else if (bytes_read == 0) { /* EOF */
292 break;
293 } else {
294 if (!buffer)
295 buffer = g_string_sized_new (bytes_read);
296 buffer = g_string_append_len (buffer, buf, bytes_read)g_string_append_len_inline (buffer, buf, bytes_read);
297 }
298 }
299
300 g_free (display_filename);
301
302 if (buffer) {
303 *contents = g_string_free (buffer, FALSE)(__builtin_constant_p ((0)) ? (((0)) ? (g_string_free) ((buffer
), ((0))) : g_string_free_and_steal (buffer)) : (g_string_free
) ((buffer), ((0))));
304
305 if (length)
306 *length = strlen (*contents);
307 }
308
309 close (fd);
310
311 return TRUE(!(0));
312}