]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/libudev/libudev-device-private.c
2 * libudev - interface to udev device information
4 * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
23 #include "libudev-private.h"
25 static void udev_device_tag(struct udev_device
*dev
, const char *tag
, bool add
)
28 struct udev
*udev
= udev_device_get_udev(dev
);
29 char filename
[UTIL_PATH_SIZE
];
31 id
= udev_device_get_id_filename(dev
);
34 util_strscpyl(filename
, sizeof(filename
), TEST_PREFIX
"/run/udev/tags/", tag
, "/", id
, NULL
);
39 util_create_path(udev
, filename
);
40 fd
= open(filename
, O_WRONLY
|O_CREAT
|O_CLOEXEC
|O_TRUNC
|O_NOFOLLOW
, 0444);
48 int udev_device_tag_index(struct udev_device
*dev
, struct udev_device
*dev_old
, bool add
)
50 struct udev_list_entry
*list_entry
;
53 if (add
&& dev_old
!= NULL
) {
54 /* delete possible left-over tags */
55 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(dev_old
)) {
56 const char *tag_old
= udev_list_entry_get_name(list_entry
);
57 struct udev_list_entry
*list_entry_current
;
60 udev_list_entry_foreach(list_entry_current
, udev_device_get_tags_list_entry(dev
)) {
61 const char *tag
= udev_list_entry_get_name(list_entry_current
);
63 if (strcmp(tag
, tag_old
) == 0) {
69 udev_device_tag(dev_old
, tag_old
, false);
73 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(dev
))
74 udev_device_tag(dev
, udev_list_entry_get_name(list_entry
), add
);
79 static bool device_has_info(struct udev_device
*udev_device
)
81 struct udev_list_entry
*list_entry
;
83 if (udev_device_get_devlinks_list_entry(udev_device
) != NULL
)
85 if (udev_device_get_devlink_priority(udev_device
) != 0)
87 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(udev_device
))
88 if (udev_list_entry_get_num(list_entry
))
90 if (udev_device_get_tags_list_entry(udev_device
) != NULL
)
92 if (udev_device_get_watch_handle(udev_device
) >= 0)
97 int udev_device_update_db(struct udev_device
*udev_device
)
101 struct udev
*udev
= udev_device_get_udev(udev_device
);
102 char filename
[UTIL_PATH_SIZE
];
103 char filename_tmp
[UTIL_PATH_SIZE
];
106 id
= udev_device_get_id_filename(udev_device
);
110 has_info
= device_has_info(udev_device
);
111 util_strscpyl(filename
, sizeof(filename
), TEST_PREFIX
"/run/udev/data/", id
, NULL
);
113 /* do not store anything for otherwise empty devices */
115 major(udev_device_get_devnum(udev_device
)) == 0 &&
116 udev_device_get_ifindex(udev_device
) == 0) {
121 /* write a database file */
122 util_strscpyl(filename_tmp
, sizeof(filename_tmp
), filename
, ".tmp", NULL
);
123 util_create_path(udev
, filename_tmp
);
124 f
= fopen(filename_tmp
, "we");
126 err(udev
, "unable to create temporary db file '%s': %m\n", filename_tmp
);
131 * set 'sticky' bit to indicate that we should not clean the
132 * database when we transition from initramfs to the real root
134 if (udev_device_get_db_persist(udev_device
))
135 fchmod(fileno(f
), 01644);
138 struct udev_list_entry
*list_entry
;
140 if (major(udev_device_get_devnum(udev_device
)) > 0) {
141 udev_list_entry_foreach(list_entry
, udev_device_get_devlinks_list_entry(udev_device
))
142 fprintf(f
, "S:%s\n", udev_list_entry_get_name(list_entry
) + strlen(TEST_PREFIX
"/dev/"));
143 if (udev_device_get_devlink_priority(udev_device
) != 0)
144 fprintf(f
, "L:%i\n", udev_device_get_devlink_priority(udev_device
));
145 if (udev_device_get_watch_handle(udev_device
) >= 0)
146 fprintf(f
, "W:%i\n", udev_device_get_watch_handle(udev_device
));
149 if (udev_device_get_usec_initialized(udev_device
) > 0)
150 fprintf(f
, "I:%llu\n", udev_device_get_usec_initialized(udev_device
));
152 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(udev_device
)) {
153 if (!udev_list_entry_get_num(list_entry
))
155 fprintf(f
, "E:%s=%s\n",
156 udev_list_entry_get_name(list_entry
),
157 udev_list_entry_get_value(list_entry
));
160 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(udev_device
))
161 fprintf(f
, "G:%s\n", udev_list_entry_get_name(list_entry
));
165 rename(filename_tmp
, filename
);
166 dbg(udev
, "created %s file '%s' for '%s'\n", has_info
? "db" : "empty",
167 filename
, udev_device_get_devpath(udev_device
));
171 int udev_device_delete_db(struct udev_device
*udev_device
)
174 char filename
[UTIL_PATH_SIZE
];
176 id
= udev_device_get_id_filename(udev_device
);
179 util_strscpyl(filename
, sizeof(filename
), TEST_PREFIX
"/run/udev/data/", id
, NULL
);