]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/libudev/libudev-device-private.c
2 This file is part of systemd.
4 Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 #include "libudev-private.h"
32 static void udev_device_tag(struct udev_device
*dev
, const char *tag
, bool add
)
35 char filename
[UTIL_PATH_SIZE
];
37 id
= udev_device_get_id_filename(dev
);
40 strscpyl(filename
, sizeof(filename
), "/run/udev/tags/", tag
, "/", id
, NULL
);
45 mkdir_parents(filename
, 0755);
46 fd
= open(filename
, O_WRONLY
|O_CREAT
|O_CLOEXEC
|O_TRUNC
|O_NOFOLLOW
, 0444);
54 int udev_device_tag_index(struct udev_device
*dev
, struct udev_device
*dev_old
, bool add
)
56 struct udev_list_entry
*list_entry
;
59 if (add
&& dev_old
!= NULL
) {
60 /* delete possible left-over tags */
61 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(dev_old
)) {
62 const char *tag_old
= udev_list_entry_get_name(list_entry
);
63 struct udev_list_entry
*list_entry_current
;
66 udev_list_entry_foreach(list_entry_current
, udev_device_get_tags_list_entry(dev
)) {
67 const char *tag
= udev_list_entry_get_name(list_entry_current
);
69 if (streq(tag
, tag_old
)) {
75 udev_device_tag(dev_old
, tag_old
, false);
79 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(dev
))
80 udev_device_tag(dev
, udev_list_entry_get_name(list_entry
), add
);
85 static bool device_has_info(struct udev_device
*udev_device
)
87 struct udev_list_entry
*list_entry
;
89 if (udev_device_get_devlinks_list_entry(udev_device
) != NULL
)
91 if (udev_device_get_devlink_priority(udev_device
) != 0)
93 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(udev_device
))
94 if (udev_list_entry_get_num(list_entry
))
96 if (udev_device_get_tags_list_entry(udev_device
) != NULL
)
98 if (udev_device_get_watch_handle(udev_device
) >= 0)
103 int udev_device_update_db(struct udev_device
*udev_device
)
107 char filename
[UTIL_PATH_SIZE
];
108 char filename_tmp
[UTIL_PATH_SIZE
];
112 id
= udev_device_get_id_filename(udev_device
);
116 has_info
= device_has_info(udev_device
);
117 strscpyl(filename
, sizeof(filename
), "/run/udev/data/", id
, NULL
);
119 /* do not store anything for otherwise empty devices */
121 major(udev_device_get_devnum(udev_device
)) == 0 &&
122 udev_device_get_ifindex(udev_device
) == 0) {
127 /* write a database file */
128 strscpyl(filename_tmp
, sizeof(filename_tmp
), filename
, ".tmp", NULL
);
129 mkdir_parents(filename_tmp
, 0755);
130 f
= fopen(filename_tmp
, "we");
132 return log_debug_errno(errno
, "unable to create temporary db file '%s': %m", filename_tmp
);
135 * set 'sticky' bit to indicate that we should not clean the
136 * database when we transition from initramfs to the real root
138 if (udev_device_get_db_persist(udev_device
))
139 fchmod(fileno(f
), 01644);
142 struct udev_list_entry
*list_entry
;
144 if (major(udev_device_get_devnum(udev_device
)) > 0) {
145 udev_list_entry_foreach(list_entry
, udev_device_get_devlinks_list_entry(udev_device
))
146 fprintf(f
, "S:%s\n", udev_list_entry_get_name(list_entry
) + strlen("/dev/"));
147 if (udev_device_get_devlink_priority(udev_device
) != 0)
148 fprintf(f
, "L:%i\n", udev_device_get_devlink_priority(udev_device
));
149 if (udev_device_get_watch_handle(udev_device
) >= 0)
150 fprintf(f
, "W:%i\n", udev_device_get_watch_handle(udev_device
));
153 if (udev_device_get_usec_initialized(udev_device
) > 0)
154 fprintf(f
, "I:"USEC_FMT
"\n", udev_device_get_usec_initialized(udev_device
));
156 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(udev_device
)) {
157 if (!udev_list_entry_get_num(list_entry
))
159 fprintf(f
, "E:%s=%s\n",
160 udev_list_entry_get_name(list_entry
),
161 udev_list_entry_get_value(list_entry
));
164 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(udev_device
))
165 fprintf(f
, "G:%s\n", udev_list_entry_get_name(list_entry
));
169 r
= rename(filename_tmp
, filename
);
172 log_debug("created %s file '%s' for '%s'", has_info
? "db" : "empty",
173 filename
, udev_device_get_devpath(udev_device
));
177 int udev_device_delete_db(struct udev_device
*udev_device
)
180 char filename
[UTIL_PATH_SIZE
];
182 id
= udev_device_get_id_filename(udev_device
);
185 strscpyl(filename
, sizeof(filename
), "/run/udev/data/", id
, NULL
);