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ea733a2f GKH |
1 | /* |
2 | * udev-remove.c | |
3 | * | |
4 | * Userspace devfs | |
5 | * | |
6 | * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com> | |
7 | * | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation version 2 of the License. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <stdio.h> | |
27 | #include <fcntl.h> | |
28 | #include <unistd.h> | |
29 | #include <errno.h> | |
30 | ||
31 | #include "udev.h" | |
32 | #include "udev_version.h" | |
7ac0feeb | 33 | #include "udev_dbus.h" |
54988802 | 34 | #include "logging.h" |
ea733a2f | 35 | #include "namedev.h" |
8e41d35d | 36 | #include "udevdb.h" |
ea733a2f GKH |
37 | #include "libsysfs/libsysfs.h" |
38 | ||
3d150dfb | 39 | static int delete_path(char *path) |
ea733a2f | 40 | { |
3d150dfb KS |
41 | char *pos; |
42 | int retval; | |
ea733a2f | 43 | |
3d150dfb KS |
44 | pos = strrchr(path, '/'); |
45 | while (1) { | |
46 | *pos = '\0'; | |
47 | pos = strrchr(path, '/'); | |
48 | ||
49 | /* don't remove the last one */ | |
50 | if ((pos == path) || (pos == NULL)) | |
51 | break; | |
52 | ||
53 | /* remove if empty */ | |
54 | retval = rmdir(path); | |
55 | if (retval) { | |
56 | if (errno == ENOTEMPTY) | |
57 | return 0; | |
58 | dbg("rmdir(%s) failed with error '%s'", | |
59 | path, strerror(errno)); | |
60 | break; | |
61 | } | |
62 | dbg("removed '%s'", path); | |
5840bc63 | 63 | } |
3d150dfb | 64 | return 0; |
ea733a2f GKH |
65 | } |
66 | ||
3d150dfb | 67 | static int delete_node(struct udevice *dev) |
ea733a2f GKH |
68 | { |
69 | char filename[255]; | |
4763256c KS |
70 | char *symlinks; |
71 | char *linkname; | |
218eae87 | 72 | int retval; |
ea733a2f | 73 | |
c056c514 | 74 | strncpy(filename, udev_root, sizeof(filename)); |
3d150dfb | 75 | strncat(filename, dev->name, sizeof(filename)); |
ea733a2f | 76 | |
54988802 | 77 | info("removing device node '%s'", filename); |
218eae87 KS |
78 | retval = unlink(filename); |
79 | if (retval) { | |
80 | dbg("unlink(%s) failed with error '%s'", | |
81 | filename, strerror(errno)); | |
82 | return retval; | |
83 | } | |
84 | ||
85 | /* remove subdirectories */ | |
3d150dfb KS |
86 | if (strchr(dev->name, '/')) |
87 | delete_path(filename); | |
88 | ||
89 | if (*dev->symlink) { | |
4763256c KS |
90 | symlinks = dev->symlink; |
91 | while (1) { | |
92 | linkname = strsep(&symlinks, " "); | |
93 | if (linkname == NULL) | |
94 | break; | |
95 | ||
96 | strncpy(filename, udev_root, sizeof(filename)); | |
97 | strncat(filename, linkname, sizeof(filename)); | |
98 | ||
99 | dbg("unlinking symlink '%s'", filename); | |
100 | retval = unlink(filename); | |
101 | if (retval) { | |
102 | dbg("unlink(%s) failed with error '%s'", | |
103 | filename, strerror(errno)); | |
104 | return retval; | |
105 | } | |
106 | if (strchr(dev->symlink, '/')) { | |
107 | delete_path(filename); | |
108 | } | |
218eae87 KS |
109 | } |
110 | } | |
3d150dfb | 111 | |
218eae87 | 112 | return retval; |
ea733a2f GKH |
113 | } |
114 | ||
3d150dfb KS |
115 | /* |
116 | * Look up the sysfs path in the database to see if we have named this device | |
117 | * something different from the kernel name. If we have, us it. If not, use | |
118 | * the default kernel name for lack of anything else to know to do. | |
119 | */ | |
120 | int udev_remove_device(char *path, char *subsystem) | |
ea733a2f | 121 | { |
808423c9 | 122 | struct udevice dev; |
3d150dfb | 123 | char *temp; |
a56ef382 KS |
124 | int retval; |
125 | ||
808423c9 | 126 | memset(&dev, 0, sizeof(dev)); |
ea733a2f | 127 | |
808423c9 | 128 | retval = udevdb_get_dev(path, &dev); |
a56ef382 | 129 | if (retval) { |
3d150dfb KS |
130 | dbg("'%s' not found in database, falling back on default name", path); |
131 | temp = strrchr(path, '/'); | |
132 | if (temp == NULL) | |
133 | return -ENODEV; | |
808423c9 | 134 | strncpy(dev.name, &temp[1], sizeof(dev.name)); |
ea733a2f GKH |
135 | } |
136 | ||
808423c9 | 137 | dbg("name is '%s'", dev.name); |
3d150dfb | 138 | udevdb_delete_dev(path); |
5aebfbcb | 139 | |
808423c9 | 140 | sysbus_send_remove(dev.name, path); |
7ac0feeb | 141 | |
808423c9 | 142 | retval = delete_node(&dev); |
a56ef382 | 143 | return retval; |
ea733a2f | 144 | } |