| /* vi: set sw=4 ts=4: */ |
| /* |
| * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com> |
| * |
| * makedevs |
| * Make ranges of device files quickly. |
| * known bugs: can't deal with alpha ranges |
| */ |
| //config:config MAKEDEVS |
| //config: bool "makedevs" |
| //config: default y |
| //config: help |
| //config: 'makedevs' is a utility used to create a batch of devices with |
| //config: one command. |
| //config: |
| //config: There are two choices for command line behaviour, the interface |
| //config: as used by LEAF/Linux Router Project, or a device table file. |
| //config: |
| //config: 'leaf' is traditionally what busybox follows, it allows multiple |
| //config: devices of a particluar type to be created per command. |
| //config: e.g. /dev/hda[0-9] |
| //config: Device properties are passed as command line arguments. |
| //config: |
| //config: 'table' reads device properties from a file or stdin, allowing |
| //config: a batch of unrelated devices to be made with one command. |
| //config: User/group names are allowed as an alternative to uid/gid. |
| //config: |
| //config:choice |
| //config: prompt "Choose makedevs behaviour" |
| //config: depends on MAKEDEVS |
| //config: default FEATURE_MAKEDEVS_TABLE |
| //config: |
| //config:config FEATURE_MAKEDEVS_LEAF |
| //config: bool "leaf" |
| //config: |
| //config:config FEATURE_MAKEDEVS_TABLE |
| //config: bool "table" |
| //config: |
| //config:endchoice |
| |
| //applet:IF_MAKEDEVS(APPLET(makedevs, BB_DIR_SBIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_MAKEDEVS) += makedevs.o |
| |
| //usage:#if ENABLE_FEATURE_MAKEDEVS_LEAF |
| //usage:#define makedevs_trivial_usage |
| //usage: "NAME TYPE MAJOR MINOR FIRST LAST [s]" |
| //usage:#define makedevs_full_usage "\n\n" |
| //usage: "Create a range of block or character special files" |
| //usage: "\n" |
| //usage: "\nTYPE is:" |
| //usage: "\n b Block device" |
| //usage: "\n c Character device" |
| //usage: "\n f FIFO, MAJOR and MINOR are ignored" |
| //usage: "\n" |
| //usage: "\nFIRST..LAST specify numbers appended to NAME." |
| //usage: "\nIf 's' is the last argument, the base device is created as well." |
| //usage: "\n" |
| //usage: "\nExamples:" |
| //usage: "\n makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63" |
| //usage: "\n makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8" |
| //usage: |
| //usage:#define makedevs_example_usage |
| //usage: "# makedevs /dev/ttyS c 4 66 2 63\n" |
| //usage: "[creates ttyS2-ttyS63]\n" |
| //usage: "# makedevs /dev/hda b 3 0 0 8 s\n" |
| //usage: "[creates hda,hda1-hda8]\n" |
| //usage:#endif |
| //usage: |
| //usage:#if ENABLE_FEATURE_MAKEDEVS_TABLE |
| //usage:#define makedevs_trivial_usage |
| //usage: "[-d device_table] rootdir" |
| //usage:#define makedevs_full_usage "\n\n" |
| //usage: "Create a range of special files as specified in a device table.\n" |
| //usage: "Device table entries take the form of:\n" |
| //usage: "<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>\n" |
| //usage: "Where name is the file name, type can be one of:\n" |
| //usage: " f Regular file\n" |
| //usage: " d Directory\n" |
| //usage: " c Character device\n" |
| //usage: " b Block device\n" |
| //usage: " p Fifo (named pipe)\n" |
| //usage: "uid is the user id for the target file, gid is the group id for the\n" |
| //usage: "target file. The rest of the entries (major, minor, etc) apply to\n" |
| //usage: "to device special files. A '-' may be used for blank entries." |
| //usage: |
| //usage:#define makedevs_example_usage |
| //usage: "For example:\n" |
| //usage: "<name> <type> <mode><uid><gid><major><minor><start><inc><count>\n" |
| //usage: "/dev d 755 0 0 - - - - -\n" |
| //usage: "/dev/console c 666 0 0 5 1 - - -\n" |
| //usage: "/dev/null c 666 0 0 1 3 0 0 -\n" |
| //usage: "/dev/zero c 666 0 0 1 5 0 0 -\n" |
| //usage: "/dev/hda b 640 0 0 3 0 0 0 -\n" |
| //usage: "/dev/hda b 640 0 0 3 1 1 1 15\n\n" |
| //usage: "Will Produce:\n" |
| //usage: "/dev\n" |
| //usage: "/dev/console\n" |
| //usage: "/dev/null\n" |
| //usage: "/dev/zero\n" |
| //usage: "/dev/hda\n" |
| //usage: "/dev/hda[0-15]\n" |
| //usage:#endif |
| |
| #include "libbb.h" |
| |
| #if ENABLE_FEATURE_MAKEDEVS_LEAF |
| /* |
| makedevs NAME TYPE MAJOR MINOR FIRST LAST [s] |
| TYPEs: |
| b Block device |
| c Character device |
| f FIFO |
| |
| FIRST..LAST specify numbers appended to NAME. |
| If 's' is the last argument, the base device is created as well. |
| Examples: |
| makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63 |
| makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8 |
| */ |
| int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int makedevs_main(int argc, char **argv) |
| { |
| mode_t mode; |
| char *basedev, *type, *nodname, *buf; |
| int Smajor, Sminor, S, E; |
| |
| if (argc < 7 || argv[1][0] == '-') |
| bb_show_usage(); |
| |
| basedev = argv[1]; |
| buf = xasprintf("%s%u", argv[1], (unsigned)-1); |
| type = argv[2]; |
| Smajor = xatoi_positive(argv[3]); |
| Sminor = xatoi_positive(argv[4]); |
| S = xatoi_positive(argv[5]); |
| E = xatoi_positive(argv[6]); |
| nodname = argv[7] ? basedev : buf; |
| |
| mode = 0660; |
| switch (type[0]) { |
| case 'c': |
| mode |= S_IFCHR; |
| break; |
| case 'b': |
| mode |= S_IFBLK; |
| break; |
| case 'f': |
| mode |= S_IFIFO; |
| break; |
| default: |
| bb_show_usage(); |
| } |
| |
| while (S <= E) { |
| sprintf(buf, "%s%u", basedev, S); |
| |
| /* if mode != S_IFCHR and != S_IFBLK, |
| * third param in mknod() ignored */ |
| if (mknod(nodname, mode, makedev(Smajor, Sminor)) != 0 |
| && errno != EEXIST |
| ) { |
| bb_perror_msg("can't create '%s'", nodname); |
| } |
| |
| /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */ |
| nodname = buf; |
| S++; |
| Sminor++; |
| } |
| |
| return 0; |
| } |
| |
| #elif ENABLE_FEATURE_MAKEDEVS_TABLE |
| |
| /* Licensed under GPLv2 or later, see file LICENSE in this source tree. */ |
| |
| int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int makedevs_main(int argc UNUSED_PARAM, char **argv) |
| { |
| parser_t *parser; |
| char *line = (char *)"-"; |
| int ret = EXIT_SUCCESS; |
| |
| opt_complementary = "=1"; /* exactly one param */ |
| getopt32(argv, "d:", &line); |
| argv += optind; |
| |
| xchdir(*argv); /* ensure root dir exists */ |
| |
| umask(0); |
| |
| printf("rootdir=%s\ntable=", *argv); |
| if (NOT_LONE_DASH(line)) { |
| printf("'%s'\n", line); |
| } else { |
| puts("<stdin>"); |
| } |
| |
| parser = config_open(line); |
| while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) { |
| int linenum; |
| char type; |
| unsigned mode = 0755; |
| unsigned major = 0; |
| unsigned minor = 0; |
| unsigned count = 0; |
| unsigned increment = 0; |
| unsigned start = 0; |
| char name[41]; |
| char user[41]; |
| char group[41]; |
| char *full_name = name; |
| uid_t uid; |
| gid_t gid; |
| |
| linenum = parser->lineno; |
| |
| if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", |
| name, &type, &mode, user, group, |
| &major, &minor, &start, &increment, &count)) |
| || ((unsigned)(major | minor | start | count | increment) > 255) |
| ) { |
| bb_error_msg("invalid line %d: '%s'", linenum, line); |
| ret = EXIT_FAILURE; |
| continue; |
| } |
| |
| gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid(); |
| uid = (*user) ? get_ug_id(user, xuname2uid) : getuid(); |
| /* We are already in the right root dir, |
| * so make absolute paths relative */ |
| if ('/' == *full_name) |
| full_name++; |
| |
| if (type == 'd') { |
| bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR); |
| if (chown(full_name, uid, gid) == -1) { |
| chown_fail: |
| bb_perror_msg("line %d: can't chown %s", linenum, full_name); |
| ret = EXIT_FAILURE; |
| continue; |
| } |
| if (chmod(full_name, mode) < 0) { |
| chmod_fail: |
| bb_perror_msg("line %d: can't chmod %s", linenum, full_name); |
| ret = EXIT_FAILURE; |
| continue; |
| } |
| } else if (type == 'f') { |
| struct stat st; |
| if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) { |
| bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name); |
| ret = EXIT_FAILURE; |
| continue; |
| } |
| if (chown(full_name, uid, gid) < 0) |
| goto chown_fail; |
| if (chmod(full_name, mode) < 0) |
| goto chmod_fail; |
| } else { |
| dev_t rdev; |
| unsigned i; |
| char *full_name_inc; |
| |
| if (type == 'p') { |
| mode |= S_IFIFO; |
| } else if (type == 'c') { |
| mode |= S_IFCHR; |
| } else if (type == 'b') { |
| mode |= S_IFBLK; |
| } else { |
| bb_error_msg("line %d: unsupported file type %c", linenum, type); |
| ret = EXIT_FAILURE; |
| continue; |
| } |
| |
| full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2); |
| if (count) |
| count--; |
| for (i = start; i <= start + count; i++) { |
| sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i); |
| rdev = makedev(major, minor + (i - start) * increment); |
| if (mknod(full_name_inc, mode, rdev) != 0 |
| && errno != EEXIST |
| ) { |
| bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc); |
| ret = EXIT_FAILURE; |
| } else if (chown(full_name_inc, uid, gid) < 0) { |
| bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc); |
| ret = EXIT_FAILURE; |
| } else if (chmod(full_name_inc, mode) < 0) { |
| bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc); |
| ret = EXIT_FAILURE; |
| } |
| } |
| free(full_name_inc); |
| } |
| } |
| if (ENABLE_FEATURE_CLEAN_UP) |
| config_close(parser); |
| |
| return ret; |
| } |
| |
| #else |
| # error makedevs configuration error, either leaf or table must be selected |
| #endif |