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c81b35c0 KS |
1 | /* |
2 | * udev_lib - generic stuff used by udev | |
3 | * | |
4 | * Copyright (C) 2004 Kay Sievers <kay@vrfy.org> | |
5 | * | |
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. | |
9 | * | |
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. | |
14 | * | |
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. | |
18 | * | |
19 | */ | |
20 | ||
21 | ||
22 | #include <stdlib.h> | |
23 | #include <stdio.h> | |
4a539daf | 24 | #include <stddef.h> |
c81b35c0 KS |
25 | #include <unistd.h> |
26 | #include <fcntl.h> | |
4a539daf KS |
27 | #include <errno.h> |
28 | #include <dirent.h> | |
c81b35c0 KS |
29 | #include <sys/stat.h> |
30 | #include <sys/mman.h> | |
31 | ||
32 | #include "libsysfs/sysfs/libsysfs.h" | |
33 | #include "udev.h" | |
4a539daf | 34 | #include "logging.h" |
c81b35c0 | 35 | #include "udev_lib.h" |
4a539daf | 36 | #include "list.h" |
c81b35c0 KS |
37 | |
38 | ||
39 | char *get_action(void) | |
40 | { | |
41 | char *action; | |
42 | ||
43 | action = getenv("ACTION"); | |
44 | if (action != NULL && strlen(action) > ACTION_SIZE) | |
45 | action[ACTION_SIZE-1] = '\0'; | |
46 | ||
47 | return action; | |
48 | } | |
49 | ||
50 | char *get_devpath(void) | |
51 | { | |
52 | char *devpath; | |
53 | ||
54 | devpath = getenv("DEVPATH"); | |
55 | if (devpath != NULL && strlen(devpath) > DEVPATH_SIZE) | |
56 | devpath[DEVPATH_SIZE-1] = '\0'; | |
57 | ||
58 | return devpath; | |
59 | } | |
60 | ||
4b06c852 | 61 | char *get_devname(void) |
89fe4e00 | 62 | { |
4b06c852 | 63 | char *devname; |
89fe4e00 | 64 | |
4b06c852 | 65 | devname = getenv("DEVNAME"); |
66 | if (devname != NULL && strlen(devname) > NAME_SIZE) | |
67 | devname[NAME_SIZE-1] = '\0'; | |
89fe4e00 | 68 | |
4b06c852 | 69 | return devname; |
89fe4e00 GKH |
70 | } |
71 | ||
c81b35c0 KS |
72 | char *get_seqnum(void) |
73 | { | |
74 | char *seqnum; | |
75 | ||
76 | seqnum = getenv("SEQNUM"); | |
77 | ||
78 | return seqnum; | |
79 | } | |
80 | ||
81 | char *get_subsystem(char *subsystem) | |
82 | { | |
83 | if (subsystem != NULL && strlen(subsystem) > SUBSYSTEM_SIZE) | |
84 | subsystem[SUBSYSTEM_SIZE-1] = '\0'; | |
85 | ||
86 | return subsystem; | |
87 | } | |
88 | ||
7b9b1839 KS |
89 | #define BLOCK_PATH "/block/" |
90 | #define CLASS_PATH "/class/" | |
91 | #define NET_PATH "/class/net/" | |
92 | ||
f61d732a KS |
93 | char get_device_type(const char *path, const char *subsystem) |
94 | { | |
7b9b1839 KS |
95 | if (strcmp(subsystem, "block") == 0) |
96 | return 'b'; | |
97 | ||
98 | if (strcmp(subsystem, "net") == 0) | |
99 | return 'n'; | |
100 | ||
101 | if (strncmp(path, BLOCK_PATH, strlen(BLOCK_PATH)) == 0 && | |
102 | strlen(path) > strlen(BLOCK_PATH)) | |
f61d732a KS |
103 | return 'b'; |
104 | ||
7b9b1839 KS |
105 | if (strncmp(path, NET_PATH, strlen(NET_PATH)) == 0 && |
106 | strlen(path) > strlen(NET_PATH)) | |
f61d732a KS |
107 | return 'n'; |
108 | ||
7b9b1839 KS |
109 | if (strncmp(path, CLASS_PATH, strlen(CLASS_PATH)) == 0 && |
110 | strlen(path) > strlen(CLASS_PATH)) | |
f61d732a KS |
111 | return 'c'; |
112 | ||
113 | return '\0'; | |
114 | } | |
115 | ||
c81b35c0 KS |
116 | int file_map(const char *filename, char **buf, size_t *bufsize) |
117 | { | |
118 | struct stat stats; | |
119 | int fd; | |
120 | ||
121 | fd = open(filename, O_RDONLY); | |
122 | if (fd < 0) { | |
123 | return -1; | |
124 | } | |
125 | ||
126 | if (fstat(fd, &stats) < 0) { | |
686cecf2 | 127 | close(fd); |
c81b35c0 KS |
128 | return -1; |
129 | } | |
130 | ||
131 | *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0); | |
132 | if (*buf == MAP_FAILED) { | |
686cecf2 | 133 | close(fd); |
c81b35c0 KS |
134 | return -1; |
135 | } | |
136 | *bufsize = stats.st_size; | |
137 | ||
138 | close(fd); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | void file_unmap(char *buf, size_t bufsize) | |
144 | { | |
145 | munmap(buf, bufsize); | |
146 | } | |
147 | ||
148 | size_t buf_get_line(char *buf, size_t buflen, size_t cur) | |
149 | { | |
150 | size_t count = 0; | |
151 | ||
152 | for (count = cur; count < buflen && buf[count] != '\n'; count++); | |
153 | ||
154 | return count - cur; | |
155 | } | |
156 | ||
aef6bb13 KS |
157 | void leading_slash(char *path) |
158 | { | |
159 | int len; | |
160 | ||
161 | len = strlen(path); | |
162 | if (len > 0 && path[len-1] != '/') { | |
163 | path[len] = '/'; | |
164 | path[len+1] = '\0'; | |
165 | } | |
166 | } | |
167 | ||
168 | void no_leading_slash(char *path) | |
169 | { | |
170 | int len; | |
171 | ||
172 | len = strlen(path); | |
173 | if (len > 0 && path[len-1] == '/') | |
174 | path[len-1] = '\0'; | |
175 | } | |
176 | ||
4a539daf KS |
177 | struct files { |
178 | struct list_head list; | |
179 | char name[NAME_SIZE]; | |
180 | }; | |
181 | ||
182 | /* sort files in lexical order */ | |
183 | static int file_list_insert(char *filename, struct list_head *file_list) | |
184 | { | |
185 | struct files *loop_file; | |
186 | struct files *new_file; | |
187 | ||
188 | list_for_each_entry(loop_file, file_list, list) { | |
189 | if (strcmp(loop_file->name, filename) > 0) { | |
190 | break; | |
191 | } | |
192 | } | |
193 | ||
194 | new_file = malloc(sizeof(struct files)); | |
195 | if (new_file == NULL) { | |
196 | dbg("error malloc"); | |
197 | return -ENOMEM; | |
198 | } | |
199 | ||
200 | strfieldcpy(new_file->name, filename); | |
201 | list_add_tail(&new_file->list, &loop_file->list); | |
202 | return 0; | |
203 | } | |
204 | ||
aef6bb13 | 205 | /* calls function for every file found in specified directory */ |
4a539daf KS |
206 | int call_foreach_file(int fnct(char *f) , char *dirname, char *suffix) |
207 | { | |
208 | struct dirent *ent; | |
209 | DIR *dir; | |
210 | char *ext; | |
211 | char file[NAME_SIZE]; | |
212 | struct files *loop_file; | |
213 | struct files *tmp_file; | |
214 | LIST_HEAD(file_list); | |
215 | ||
216 | dbg("open directory '%s'", dirname); | |
217 | dir = opendir(dirname); | |
218 | if (dir == NULL) { | |
219 | dbg("unable to open '%s'", dirname); | |
220 | return -1; | |
221 | } | |
222 | ||
223 | while (1) { | |
224 | ent = readdir(dir); | |
225 | if (ent == NULL || ent->d_name[0] == '\0') | |
226 | break; | |
227 | ||
228 | if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER)) | |
229 | continue; | |
230 | ||
231 | /* look for file with specified suffix */ | |
232 | ext = strrchr(ent->d_name, '.'); | |
233 | if (ext == NULL) | |
234 | continue; | |
235 | ||
236 | if (strcmp(ext, suffix) != 0) | |
237 | continue; | |
238 | ||
239 | dbg("put file '%s/%s' in list", dirname, ent->d_name); | |
240 | file_list_insert(ent->d_name, &file_list); | |
241 | } | |
242 | ||
243 | /* call function for every file in the list */ | |
244 | list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) { | |
245 | strfieldcpy(file, dirname); | |
246 | strfieldcat(file, "/"); | |
247 | strfieldcat(file, loop_file->name); | |
248 | ||
249 | fnct(file); | |
250 | ||
251 | list_del(&loop_file->list); | |
252 | free(loop_file); | |
253 | } | |
254 | ||
255 | closedir(dir); | |
256 | return 0; | |
257 | } |