2 * udev_lib - generic stuff used by udev
4 * Copyright (C) 2004 Kay Sievers <kay@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.
31 #include <sys/utsname.h>
39 #define BLOCK_PATH "/block/"
40 #define CLASS_PATH "/class/"
41 #define NET_PATH "/class/net/"
43 char get_device_type(const char *path, const char *subsystem)
45 if (strcmp(subsystem, "block") == 0)
48 if (strcmp(subsystem, "net") == 0)
51 if (strncmp(path, BLOCK_PATH, strlen(BLOCK_PATH)) == 0 &&
52 strlen(path) > strlen(BLOCK_PATH))
55 if (strncmp(path, NET_PATH, strlen(NET_PATH)) == 0 &&
56 strlen(path) > strlen(NET_PATH))
59 if (strncmp(path, CLASS_PATH, strlen(CLASS_PATH)) == 0 &&
60 strlen(path) > strlen(CLASS_PATH))
66 void udev_set_values(struct udevice *udev, const char* devpath,
67 const char *subsystem, const char* action)
69 memset(udev, 0x00, sizeof(struct udevice));
70 strfieldcpy(udev->devpath, devpath);
71 strfieldcpy(udev->subsystem, subsystem);
72 strfieldcpy(udev->action, action);
73 udev->type = get_device_type(devpath, subsystem);
76 int kernel_release_satisfactory(int version, int patchlevel, int sublevel)
78 static struct utsname uts;
79 static int kversion = 0;
80 static int kpatchlevel;
87 if (sscanf (uts.release, "%u.%u.%u", &kversion, &kpatchlevel, &ksublevel) != 3) {
93 if (kversion >= version && kpatchlevel >= patchlevel && ksublevel >= sublevel)
99 int create_path(const char *path)
106 pos = strrchr(p, '/');
107 if (pos == p || pos == NULL)
110 while (pos[-1] == '/')
115 dbg("stat '%s'\n", p);
116 if (stat (p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR)
119 if (create_path (p) != 0)
122 dbg("mkdir '%s'\n", p);
123 return mkdir(p, 0755);
126 int file_map(const char *filename, char **buf, size_t *bufsize)
131 fd = open(filename, O_RDONLY);
136 if (fstat(fd, &stats) < 0) {
141 *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
142 if (*buf == MAP_FAILED) {
146 *bufsize = stats.st_size;
153 void file_unmap(char *buf, size_t bufsize)
155 munmap(buf, bufsize);
158 size_t buf_get_line(char *buf, size_t buflen, size_t cur)
162 for (count = cur; count < buflen && buf[count] != '\n'; count++);
167 void no_trailing_slash(char *path)
172 if (len > 0 && path[len-1] == '/')
177 struct list_head list;
178 char name[NAME_SIZE];
181 /* sort files in lexical order */
182 static int file_list_insert(char *filename, struct list_head *file_list)
184 struct files *loop_file;
185 struct files *new_file;
187 list_for_each_entry(loop_file, file_list, list) {
188 if (strcmp(loop_file->name, filename) > 0) {
193 new_file = malloc(sizeof(struct files));
194 if (new_file == NULL) {
199 strfieldcpy(new_file->name, filename);
200 list_add_tail(&new_file->list, &loop_file->list);
204 /* calls function for every file found in specified directory */
205 int call_foreach_file(file_fnct_t fnct, const char *dirname,
206 const char *suffix, void *data)
211 struct files *loop_file;
212 struct files *tmp_file;
213 LIST_HEAD(file_list);
215 dbg("open directory '%s'", dirname);
216 dir = opendir(dirname);
218 dbg("unable to open '%s'", dirname);
224 if (ent == NULL || ent->d_name[0] == '\0')
227 if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER))
230 /* look for file with specified suffix */
231 ext = strrchr(ent->d_name, '.');
235 if (strcmp(ext, suffix) != 0)
238 dbg("put file '%s/%s' in list", dirname, ent->d_name);
239 file_list_insert(ent->d_name, &file_list);
242 /* call function for every file in the list */
243 list_for_each_entry_safe(loop_file, tmp_file, &file_list, list) {
244 char filename[NAME_SIZE];
246 snprintf(filename, NAME_SIZE, "%s/%s", dirname, loop_file->name);
247 filename[NAME_SIZE-1] = '\0';
249 fnct(filename, data);
251 list_del(&loop_file->list);