GCC Code Coverage Report

Directory: ./
File: src/ppd-utils.c
Date: 2024-09-13 00:56:02
Exec Total Coverage
Lines: 78 85 91.8%
Functions: 8 8 100.0%
Branches: 35 62 56.5%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2020 Bastien Nocera <hadess@hadess.net>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 3 as published by
6 * the Free Software Foundation.
7 *
8 */
9
10 #define G_LOG_DOMAIN "Utils"
11
12 #include "ppd-utils.h"
13 #include <glib/gstdio.h>
14 #include <gio/gio.h>
15 #include <fcntl.h>
16 #include <stdio.h>
17 #include <errno.h>
18
19 #define PROC_CPUINFO_PATH "/proc/cpuinfo"
20
21 char *
22 1238 ppd_utils_get_sysfs_path (const char *filename)
23 {
24 1238 const char *root;
25
26 1238 root = g_getenv ("UMOCKDEV_DIR");
27
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 1238 if (!root || *root == '\0')
28 ✗ root = "/";
29
30 1238 return g_build_filename (root, filename, NULL);
31 }
32
33 gboolean
34 532 ppd_utils_write (const char *filename,
35 const char *value,
36 GError **error)
37 {
38 #if GLIB_CHECK_VERSION (2, 76, 0)
39 532 g_autofd
40 #endif
41 532 int fd = -1;
42 532 size_t size;
43
44
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 532 g_return_val_if_fail (filename, FALSE);
45
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 532 g_return_val_if_fail (value, FALSE);
46
47 532 g_debug ("Writing '%s' to '%s'", value, filename);
48
49 532 fd = g_open (filename, O_WRONLY | O_TRUNC | O_SYNC);
50
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 532 if (fd == -1) {
51 12 g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errno),
52 "Could not open '%s' for writing", filename);
53 12 g_debug ("Could not open for writing '%s'", filename);
54 12 return FALSE;
55 }
56
57 520 size = strlen (value);
58
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 1040 while (size) {
59 520 ssize_t written = write (fd, value, size);
60
61
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 520 if (written == -1) {
62 ✗ g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errno),
63 ✗ "Error writing '%s': %s", filename, g_strerror (errno));
64 ✗ g_debug ("Error writing '%s': %s", filename, g_strerror (errno));
65 #if !GLIB_CHECK_VERSION (2, 76, 0)
66 g_close (fd, NULL);
67 #endif
68 ✗ return FALSE;
69 }
70
71
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 520 g_return_val_if_fail (written <= size, FALSE);
72 520 size -= written;
73 }
74
75 return TRUE;
76 }
77
78 gboolean
79 54 ppd_utils_write_files (GPtrArray *filenames,
80 const char *value,
81 GError **error)
82 {
83
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 54 g_return_val_if_fail (filenames != NULL, FALSE);
84
85
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 110 for (guint i = 0; i < filenames->len; i++) {
86 60 const char *file = g_ptr_array_index (filenames, i);
87
88
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 60 if (!ppd_utils_write (file, value, error))
89 return FALSE;
90 }
91
92 return TRUE;
93 }
94
95 16 gboolean ppd_utils_write_sysfs (GUdevDevice *device,
96 const char *attribute,
97 const char *value,
98 GError **error)
99 {
100 32 g_autofree char *filename = NULL;
101
102
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 16 g_return_val_if_fail (G_UDEV_IS_DEVICE (device), FALSE);
103
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 16 g_return_val_if_fail (attribute, FALSE);
104
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 16 g_return_val_if_fail (value, FALSE);
105
106 16 filename = g_build_filename (g_udev_device_get_sysfs_path (device), attribute, NULL);
107 16 return ppd_utils_write (filename, value, error);
108 }
109
110 10 gboolean ppd_utils_write_sysfs_int (GUdevDevice *device,
111 const char *attribute,
112 gint64 value,
113 GError **error)
114 {
115 20 g_autofree char *str_value = NULL;
116
117 10 str_value = g_strdup_printf ("%" G_GINT64_FORMAT, value);
118 10 return ppd_utils_write_sysfs (device, attribute, str_value, error);
119 }
120
121 GFileMonitor *
122 8 ppd_utils_monitor_sysfs_attr (GUdevDevice *device,
123 const char *attribute,
124 GError **error)
125 {
126 16 g_autofree char *path = NULL;
127 8 g_autoptr(GFile) file = NULL;
128
129 8 path = g_build_filename (g_udev_device_get_sysfs_path (device), attribute, NULL);
130 8 file = g_file_new_for_path (path);
131 8 g_debug ("Monitoring file %s for changes", path);
132
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 8 return g_file_monitor_file (file,
133 G_FILE_MONITOR_NONE,
134 NULL,
135 error);
136 }
137
138 GUdevDevice *
139 50 ppd_utils_find_device (const char *subsystem,
140 GCompareFunc func,
141 gpointer user_data)
142 {
143 50 const gchar * subsystems[] = { NULL, NULL };
144 100 g_autoptr(GUdevClient) client = NULL;
145 50 GUdevDevice *ret = NULL;
146 50 GList *devices, *l;
147
148
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 50 g_return_val_if_fail (subsystem != NULL, NULL);
149
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 50 g_return_val_if_fail (func != NULL, NULL);
150
151 50 subsystems[0] = subsystem;
152 50 client = g_udev_client_new (subsystems);
153 50 devices = g_udev_client_query_by_subsystem (client, subsystem);
154
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 50 if (devices == NULL)
155 return NULL;
156
157
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 8 for (l = devices; l != NULL; l = l->next) {
158 8 GUdevDevice *dev = l->data;
159
160
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 8 if ((func) (dev, user_data) != 0)
161 ✗ continue;
162
163 8 ret = g_object_ref (dev);
164 8 break;
165 }
166 8 g_list_free_full (devices, g_object_unref);
167
168 8 return ret;
169 }
170
171 gboolean
172 266 ppd_utils_match_cpu_vendor (const char *vendor)
173 {
174 532 g_autofree gchar *cpuinfo_path = NULL;
175 266 g_autofree gchar *cpuinfo = NULL;
176 266 g_auto(GStrv) lines = NULL;
177
178 266 cpuinfo_path = ppd_utils_get_sysfs_path (PROC_CPUINFO_PATH);
179
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 266 if (!g_file_get_contents (cpuinfo_path, &cpuinfo, NULL, NULL))
180 return FALSE;
181
182 18 lines = g_strsplit (cpuinfo, "\n", -1);
183
184
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 18 for (gchar **line = lines; *line != NULL; line++) {
185
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 18 if (g_str_has_prefix (*line, "vendor_id") &&
186
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 18 strchr (*line, ':')) {
187 36 g_auto(GStrv) sections = g_strsplit (*line, ":", 2);
188
189
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 18 if (g_strv_length (sections) < 2)
190 ✗ continue;
191
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 18 if (g_strcmp0 (g_strstrip (sections[1]), vendor) == 0)
192 18 return TRUE;
193 }
194 }
195
196 return FALSE;
197 }
198