]>
git.ipfire.org Git - thirdparty/systemd.git/blob - udev_event.c
2 * udev_event.c - udev event process
4 * Copyright (C) 2004, 2005 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but
11 * 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.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include "libsysfs/sysfs/libsysfs.h"
34 #include "udev_libc_wrapper.h"
37 #include "udev_rules.h"
38 #include "udev_utils.h"
42 dev_t
get_devt(struct sysfs_class_device
*class_dev
)
44 struct sysfs_attribute
*attr
= NULL
;
45 unsigned int major
, minor
;
48 maj
= getenv("MAJOR");
49 min
= getenv("MINOR");
55 attr
= sysfs_get_classdev_attr(class_dev
, "dev");
58 dbg("dev='%s'", attr
->value
);
60 if (sscanf(attr
->value
, "%u:%u", &major
, &minor
) != 2)
64 dbg("found major=%d, minor=%d", major
, minor
);
65 return makedev(major
, minor
);
68 int udev_process_event(struct udev_rules
*rules
, struct udevice
*udev
)
73 if (udev
->type
== DEV_BLOCK
|| udev
->type
== DEV_CLASS
|| udev
->type
== DEV_NET
) {
74 /* handle device node */
75 if (strcmp(udev
->action
, "add") == 0) {
76 struct sysfs_class_device
*class_dev
;
79 snprintf(path
, sizeof(path
), "%s%s", sysfs_path
, udev
->devpath
);
80 path
[sizeof(path
)-1] = '\0';
81 class_dev
= sysfs_open_class_device_path(path
);
82 if (class_dev
== NULL
) {
83 dbg("open class device failed");
86 dbg("opened class_dev->name='%s'", class_dev
->name
);
89 if (udev
->type
== DEV_BLOCK
|| udev
->type
== DEV_CLASS
)
90 udev
->devt
= get_devt(class_dev
);
92 if (udev
->type
== DEV_NET
|| udev
->devt
) {
94 udev_rules_get_name(rules
, udev
, class_dev
);
95 if (udev
->ignore_device
) {
96 info("device event will be ignored");
97 sysfs_close_class_device(class_dev
);
100 if (udev
->name
[0] != '\0') {
101 /* create node, store in db */
102 retval
= udev_add_device(udev
, class_dev
);
104 info("device node creation supressed");
107 dbg("no dev-file found");
108 udev_rules_get_run(rules
, udev
, class_dev
, NULL
);
109 if (udev
->ignore_device
) {
110 info("device event will be ignored");
111 sysfs_close_class_device(class_dev
);
115 sysfs_close_class_device(class_dev
);
116 } else if (strcmp(udev
->action
, "remove") == 0) {
117 struct name_entry
*name_loop
;
119 /* get data from db, remove db-entry, delete node */
121 retval
= udev_remove_device(udev
);
123 /* restore stored persistent data */
124 list_for_each_entry(name_loop
, &udev
->env_list
, node
)
125 putenv(name_loop
->name
);
127 udev_rules_get_run(rules
, udev
, NULL
, NULL
);
128 if (udev
->ignore_device
) {
129 dbg("device event will be ignored");
134 /* export name of device node or netif */
135 if (udev
->devname
[0] != '\0')
136 setenv("DEVNAME", udev
->devname
, 1);
137 } else if (udev
->type
== DEV_DEVICE
&& strcmp(udev
->action
, "add") == 0) {
138 struct sysfs_device
*devices_dev
;
141 snprintf(path
, sizeof(path
), "%s%s", sysfs_path
, udev
->devpath
);
142 path
[sizeof(path
)-1] = '\0';
143 devices_dev
= sysfs_open_device_path(path
);
145 dbg("devices device unavailable (probably remove has beaten us)");
149 dbg("devices device opened '%s'", path
);
150 udev_rules_get_run(rules
, udev
, NULL
, devices_dev
);
151 sysfs_close_device(devices_dev
);
152 if (udev
->ignore_device
) {
153 info("device event will be ignored");
157 dbg("default handling");
158 udev_rules_get_run(rules
, udev
, NULL
, NULL
);
159 if (udev
->ignore_device
) {
160 info("device event will be ignored");