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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" | |
33 | #include "namedev.h" | |
8e41d35d | 34 | #include "udevdb.h" |
ea733a2f GKH |
35 | #include "libsysfs/libsysfs.h" |
36 | ||
37 | ||
38 | /* | |
a9ce0a41 GKH |
39 | * Look up the sysfs path in the database to see if we have named this device |
40 | * something different from the kernel name. If we have, us it. If not, use | |
41 | * the default kernel name for lack of anything else to know to do. | |
ea733a2f | 42 | */ |
5840bc63 | 43 | static char *get_name(char *path, int major, int minor) |
ea733a2f GKH |
44 | { |
45 | static char name[100]; | |
5840bc63 | 46 | struct udevice *dev; |
ea733a2f GKH |
47 | char *temp; |
48 | ||
5840bc63 GKH |
49 | dev = udevdb_get_dev(path); |
50 | if (dev != NULL) { | |
51 | strcpy(name, dev->name); | |
a9ce0a41 | 52 | goto exit; |
5840bc63 | 53 | } |
a9ce0a41 | 54 | |
f7b4eca4 | 55 | dbg("'%s' not found in database, falling back on default name", path); |
5840bc63 | 56 | temp = strrchr(path, '/'); |
ea733a2f GKH |
57 | if (temp == NULL) |
58 | return NULL; | |
59 | strncpy(name, &temp[1], sizeof(name)); | |
60 | ||
a9ce0a41 | 61 | exit: |
f7b4eca4 | 62 | dbg("name is '%s'", name); |
ea733a2f GKH |
63 | return &name[0]; |
64 | } | |
65 | ||
66 | /* | |
67 | * We also want to clean up any symlinks that were created in create_node() | |
68 | */ | |
69 | static int delete_node(char *name) | |
70 | { | |
71 | char filename[255]; | |
218eae87 | 72 | int retval; |
ea733a2f | 73 | |
c056c514 | 74 | strncpy(filename, udev_root, sizeof(filename)); |
ea733a2f GKH |
75 | strncat(filename, name, sizeof(filename)); |
76 | ||
f7b4eca4 | 77 | dbg("unlinking '%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 */ | |
86 | if (strchr(name, '/')) { | |
87 | char *pos; | |
88 | ||
89 | pos = strrchr(filename, '/'); | |
90 | while (1) { | |
91 | *pos = 0x00; | |
92 | pos = strrchr(filename, '/'); | |
93 | ||
94 | /* don't remove the last one */ | |
95 | if ((pos == filename) || (pos == NULL)) | |
96 | break; | |
97 | ||
98 | /* remove if empty */ | |
99 | retval = rmdir(filename); | |
100 | if (retval) { | |
101 | if (errno == ENOTEMPTY) | |
102 | return 0; | |
103 | dbg("rmdir(%s) failed with error '%s'", | |
104 | filename, strerror(errno)); | |
105 | break; | |
106 | } | |
f7b4eca4 | 107 | dbg("removed '%s'", filename); |
218eae87 KS |
108 | } |
109 | } | |
110 | return retval; | |
ea733a2f GKH |
111 | } |
112 | ||
113 | int udev_remove_device(char *device, char *subsystem) | |
114 | { | |
115 | char *name; | |
116 | int retval = 0; | |
117 | ||
118 | name = get_name(device, 0, 0); | |
119 | if (name == NULL) { | |
120 | dbg ("get_name failed"); | |
121 | retval = -ENODEV; | |
122 | goto exit; | |
123 | } | |
124 | ||
a9ce0a41 | 125 | udevdb_delete_dev(device); |
8e41d35d | 126 | |
ea733a2f GKH |
127 | return delete_node(name); |
128 | ||
129 | exit: | |
130 | return retval; | |
131 | } |