/* 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 */ //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))) 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) { 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