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comparison toys/mdev.c @ 156:1e8f4b05cb65

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Remove trailing whitespace (thanks to Charlie Shepherd), and a couple comment tweaks.
author Rob Landley <rob@landley.net>
date Thu, 15 Nov 2007 18:30:30 -0600
parents ce6956dfc0cf
children 25447caf1b4b
comparison
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155:6c7836dbc16e 156:1e8f4b05cb65
1 /* vi:set ts=4: 1 /* vi:set ts=4:
2 * 2 *
3 * mdev - Mini udev for busybox 3 * mdev - Mini udev for busybox
4 * 4 *
5 * Copyright 2005 Rob Landley <rob@landley.net> 5 * Copyright 2005 Rob Landley <rob@landley.net>
6 * Copyright 2005 Frank Sorenson <frank@tuxrocks.com> 6 * Copyright 2005 Frank Sorenson <frank@tuxrocks.com>
7 */ 7 */
8 8
9 #include "toys.h" 9 #include "toys.h"
27 temp++; 27 temp++;
28 len = read(fd, temp, 64); 28 len = read(fd, temp, 64);
29 close(fd); 29 close(fd);
30 if (len<1) return; 30 if (len<1) return;
31 temp[len] = 0; 31 temp[len] = 0;
32 32
33 // Determine device name, type, major and minor 33 // Determine device name, type, major and minor
34 34
35 device_name = strrchr(path, '/') + 1; 35 device_name = strrchr(path, '/') + 1;
36 type = path[5]=='c' ? S_IFCHR : S_IFBLK; 36 type = path[5]=='c' ? S_IFCHR : S_IFBLK;
37 major = minor = 0; 37 major = minor = 0;
38 sscanf(temp, "%u:%u", &major, &minor); 38 sscanf(temp, "%u:%u", &major, &minor);
39 39
40 // If we have a config file, look up permissions for this device 40 // If we have a config file, look up permissions for this device
41 41
42 if (CFG_MDEV_CONF) { 42 if (CFG_MDEV_CONF) {
43 char *conf, *pos, *end; 43 char *conf, *pos, *end;
44 44
45 // mmap the config file 45 // mmap the config file
46 if (-1!=(fd = open("/etc/mdev.conf", O_RDONLY))) { 46 if (-1!=(fd = open("/etc/mdev.conf", O_RDONLY))) {
51 51
52 // Loop through lines in mmaped file 52 // Loop through lines in mmaped file
53 for (pos = conf; pos-conf<len;) { 53 for (pos = conf; pos-conf<len;) {
54 int field; 54 int field;
55 char *end2; 55 char *end2;
56 56
57 line++; 57 line++;
58 // find end of this line 58 // find end of this line
59 for(end = pos; end-conf<len && *end!='\n'; end++); 59 for(end = pos; end-conf<len && *end!='\n'; end++);
60 60
61 // Three fields: regex, uid:gid, mode 61 // Three fields: regex, uid:gid, mode
76 76
77 // Is this it? 77 // Is this it?
78 xregcomp(&match, regex, REG_EXTENDED); 78 xregcomp(&match, regex, REG_EXTENDED);
79 result=regexec(&match, device_name, 1, &off, 0); 79 result=regexec(&match, device_name, 1, &off, 0);
80 regfree(&match); 80 regfree(&match);
81 81
82 // If not this device, skip rest of line 82 // If not this device, skip rest of line
83 if (result || off.rm_so 83 if (result || off.rm_so
84 || off.rm_eo!=strlen(device_name)) 84 || off.rm_eo!=strlen(device_name))
85 goto end_line; 85 goto end_line;
86 86
157 if (!(dir = opendir(path))) 157 if (!(dir = opendir(path)))
158 perror_exit("No %s",path); 158 perror_exit("No %s",path);
159 159
160 for (;;) { 160 for (;;) {
161 struct dirent *entry = readdir(dir); 161 struct dirent *entry = readdir(dir);
162 162
163 if (!entry) break; 163 if (!entry) break;
164 164
165 // Skip "." and ".." (also skips hidden files, which is ok) 165 // Skip "." and ".." (also skips hidden files, which is ok)
166 166
167 if (entry->d_name[0]=='.') continue; 167 if (entry->d_name[0]=='.') continue;
169 if (entry->d_type == DT_DIR) { 169 if (entry->d_type == DT_DIR) {
170 snprintf(path+len, sizeof(toybuf)-len, "/%s", entry->d_name); 170 snprintf(path+len, sizeof(toybuf)-len, "/%s", entry->d_name);
171 find_dev(path); 171 find_dev(path);
172 path[len] = 0; 172 path[len] = 0;
173 } 173 }
174 174
175 // If there's a dev entry, mknod it 175 // If there's a dev entry, mknod it
176 176
177 if (strcmp(entry->d_name, "dev")) make_device(path); 177 if (strcmp(entry->d_name, "dev")) make_device(path);
178 } 178 }
179 179
180 closedir(dir); 180 closedir(dir);
181 } 181 }
182 182
183 int mdev_main(int argc, char *argv[]) 183 int mdev_main(int argc, char *argv[])
184 { 184 {
186 strcpy(toybuf, "/sys/block"); 186 strcpy(toybuf, "/sys/block");
187 find_dev(toybuf); 187 find_dev(toybuf);
188 strcpy(toybuf, "/sys/class"); 188 strcpy(toybuf, "/sys/class");
189 find_dev(toybuf); 189 find_dev(toybuf);
190 return 0; 190 return 0;
191 } 191 }
192 192
193 // hotplug support goes here 193 // hotplug support goes here
194 194
195 return 0; 195 return 0;
196 } 196 }