1 /* vi: set sw=4 ts=4: */
3 * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
6 * Make ranges of device files quickly.
7 * known bugs: can't deal with alpha ranges
9 //config:config MAKEDEVS
10 //config: bool "makedevs"
13 //config: 'makedevs' is a utility used to create a batch of devices with
14 //config: one command.
16 //config: There are two choices for command line behaviour, the interface
17 //config: as used by LEAF/Linux Router Project, or a device table file.
19 //config: 'leaf' is traditionally what busybox follows, it allows multiple
20 //config: devices of a particluar type to be created per command.
21 //config: e.g. /dev/hda[0-9]
22 //config: Device properties are passed as command line arguments.
24 //config: 'table' reads device properties from a file or stdin, allowing
25 //config: a batch of unrelated devices to be made with one command.
26 //config: User/group names are allowed as an alternative to uid/gid.
29 //config: prompt "Choose makedevs behaviour"
30 //config: depends on MAKEDEVS
31 //config: default FEATURE_MAKEDEVS_TABLE
33 //config:config FEATURE_MAKEDEVS_LEAF
36 //config:config FEATURE_MAKEDEVS_TABLE
37 //config: bool "table"
41 //applet:IF_MAKEDEVS(APPLET(makedevs, BB_DIR_SBIN, BB_SUID_DROP))
43 //kbuild:lib-$(CONFIG_MAKEDEVS) += makedevs.o
45 //usage:#if ENABLE_FEATURE_MAKEDEVS_LEAF
46 //usage:#define makedevs_trivial_usage
47 //usage: "NAME TYPE MAJOR MINOR FIRST LAST [s]"
48 //usage:#define makedevs_full_usage "\n\n"
49 //usage: "Create a range of block or character special files"
52 //usage: "\n b Block device"
53 //usage: "\n c Character device"
54 //usage: "\n f FIFO, MAJOR and MINOR are ignored"
56 //usage: "\nFIRST..LAST specify numbers appended to NAME."
57 //usage: "\nIf 's' is the last argument, the base device is created as well."
59 //usage: "\nExamples:"
60 //usage: "\n makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63"
61 //usage: "\n makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8"
63 //usage:#define makedevs_example_usage
64 //usage: "# makedevs /dev/ttyS c 4 66 2 63\n"
65 //usage: "[creates ttyS2-ttyS63]\n"
66 //usage: "# makedevs /dev/hda b 3 0 0 8 s\n"
67 //usage: "[creates hda,hda1-hda8]\n"
70 //usage:#if ENABLE_FEATURE_MAKEDEVS_TABLE
71 //usage:#define makedevs_trivial_usage
72 //usage: "[-d device_table] rootdir"
73 //usage:#define makedevs_full_usage "\n\n"
74 //usage: "Create a range of special files as specified in a device table.\n"
75 //usage: "Device table entries take the form of:\n"
76 //usage: "<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>\n"
77 //usage: "Where name is the file name, type can be one of:\n"
78 //usage: " f Regular file\n"
79 //usage: " d Directory\n"
80 //usage: " c Character device\n"
81 //usage: " b Block device\n"
82 //usage: " p Fifo (named pipe)\n"
83 //usage: "uid is the user id for the target file, gid is the group id for the\n"
84 //usage: "target file. The rest of the entries (major, minor, etc) apply to\n"
85 //usage: "to device special files. A '-' may be used for blank entries."
87 //usage:#define makedevs_example_usage
88 //usage: "For example:\n"
89 //usage: "<name> <type> <mode><uid><gid><major><minor><start><inc><count>\n"
90 //usage: "/dev d 755 0 0 - - - - -\n"
91 //usage: "/dev/console c 666 0 0 5 1 - - -\n"
92 //usage: "/dev/null c 666 0 0 1 3 0 0 -\n"
93 //usage: "/dev/zero c 666 0 0 1 5 0 0 -\n"
94 //usage: "/dev/hda b 640 0 0 3 0 0 0 -\n"
95 //usage: "/dev/hda b 640 0 0 3 1 1 1 15\n\n"
96 //usage: "Will Produce:\n"
98 //usage: "/dev/console\n"
99 //usage: "/dev/null\n"
100 //usage: "/dev/zero\n"
101 //usage: "/dev/hda\n"
102 //usage: "/dev/hda[0-15]\n"
107 #if ENABLE_FEATURE_MAKEDEVS_LEAF
109 makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]
115 FIRST..LAST specify numbers appended to NAME.
116 If 's' is the last argument, the base device is created as well.
118 makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63
119 makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8
121 int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
122 int makedevs_main(int argc, char **argv)
125 char *basedev, *type, *nodname, *buf;
126 int Smajor, Sminor, S, E;
128 if (argc < 7 || argv[1][0] == '-')
132 buf = xasprintf("%s%u", argv[1], (unsigned)-1);
134 Smajor = xatoi_positive(argv[3]);
135 Sminor = xatoi_positive(argv[4]);
136 S = xatoi_positive(argv[5]);
137 E = xatoi_positive(argv[6]);
138 nodname = argv[7] ? basedev : buf;
156 sprintf(buf, "%s%u", basedev, S);
158 /* if mode != S_IFCHR and != S_IFBLK,
159 * third param in mknod() ignored */
160 if (mknod(nodname, mode, makedev(Smajor, Sminor)) != 0
163 bb_perror_msg("can't create '%s'", nodname);
166 /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */
175 #elif ENABLE_FEATURE_MAKEDEVS_TABLE
177 /* Licensed under GPLv2 or later, see file LICENSE in this source tree. */
179 int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
180 int makedevs_main(int argc UNUSED_PARAM, char **argv)
183 char *line = (char *)"-";
184 int ret = EXIT_SUCCESS;
186 opt_complementary = "=1"; /* exactly one param */
187 getopt32(argv, "d:", &line);
190 xchdir(*argv); /* ensure root dir exists */
194 printf("rootdir=%s\ntable=", *argv);
195 if (NOT_LONE_DASH(line)) {
196 printf("'%s'\n", line);
201 parser = config_open(line);
202 while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) {
205 unsigned mode = 0755;
209 unsigned increment = 0;
214 char *full_name = name;
218 linenum = parser->lineno;
220 if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u",
221 name, &type, &mode, user, group,
222 &major, &minor, &start, &increment, &count))
223 || ((unsigned)(major | minor | start | count | increment) > 255)
225 bb_error_msg("invalid line %d: '%s'", linenum, line);
230 gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
231 uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
232 /* We are already in the right root dir,
233 * so make absolute paths relative */
234 if ('/' == *full_name)
238 bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
239 if (chown(full_name, uid, gid) == -1) {
241 bb_perror_msg("line %d: can't chown %s", linenum, full_name);
245 if (chmod(full_name, mode) < 0) {
247 bb_perror_msg("line %d: can't chmod %s", linenum, full_name);
251 } else if (type == 'f') {
253 if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
254 bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
258 if (chown(full_name, uid, gid) < 0)
260 if (chmod(full_name, mode) < 0)
269 } else if (type == 'c') {
271 } else if (type == 'b') {
274 bb_error_msg("line %d: unsupported file type %c", linenum, type);
279 full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2);
282 for (i = start; i <= start + count; i++) {
283 sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i);
284 rdev = makedev(major, minor + (i - start) * increment);
285 if (mknod(full_name_inc, mode, rdev) != 0
288 bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc);
290 } else if (chown(full_name_inc, uid, gid) < 0) {
291 bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc);
293 } else if (chmod(full_name_inc, mode) < 0) {
294 bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc);
301 if (ENABLE_FEATURE_CLEAN_UP)
302 config_close(parser);
308 # error makedevs configuration error, either leaf or table must be selected