[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
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| 4 | *
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| 5 | * makedevs
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| 6 | * Make ranges of device files quickly.
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| 7 | * known bugs: can't deal with alpha ranges
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| 8 | */
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| 9 |
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| 10 | #include "libbb.h"
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| 11 |
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| 12 | #if ENABLE_FEATURE_MAKEDEVS_LEAF
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| 13 | /*
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| 14 | makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]
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| 15 | TYPEs:
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| 16 | b Block device
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| 17 | c Character device
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| 18 | f FIFO
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| 19 |
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| 20 | FIRST..LAST specify numbers appended to NAME.
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| 21 | If 's' is the last argument, the base device is created as well.
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| 22 | Examples:
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| 23 | makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63
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| 24 | makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8
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| 25 | */
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| 26 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 27 | int makedevs_main(int argc, char **argv)
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| 28 | {
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| 29 | mode_t mode;
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| 30 | char *basedev, *type, *nodname, *buf;
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| 31 | int Smajor, Sminor, S, E;
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| 32 |
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| 33 | if (argc < 7 || argv[1][0] == '-')
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| 34 | bb_show_usage();
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| 35 |
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| 36 | basedev = argv[1];
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| 37 | buf = xasprintf("%s%u", argv[1], (unsigned)-1);
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| 38 | type = argv[2];
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| 39 | Smajor = xatoi_positive(argv[3]);
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| 40 | Sminor = xatoi_positive(argv[4]);
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| 41 | S = xatoi_positive(argv[5]);
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| 42 | E = xatoi_positive(argv[6]);
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| 43 | nodname = argv[7] ? basedev : buf;
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| 44 |
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| 45 | mode = 0660;
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| 46 | switch (type[0]) {
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| 47 | case 'c':
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| 48 | mode |= S_IFCHR;
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| 49 | break;
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| 50 | case 'b':
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| 51 | mode |= S_IFBLK;
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| 52 | break;
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| 53 | case 'f':
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| 54 | mode |= S_IFIFO;
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| 55 | break;
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| 56 | default:
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| 57 | bb_show_usage();
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| 58 | }
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| 59 |
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| 60 | while (S <= E) {
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| 61 | sprintf(buf, "%s%u", basedev, S);
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| 62 |
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| 63 | /* if mode != S_IFCHR and != S_IFBLK,
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| 64 | * third param in mknod() ignored */
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| 65 | if (mknod(nodname, mode, makedev(Smajor, Sminor)))
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| 66 | bb_perror_msg("can't create '%s'", nodname);
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| 67 |
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| 68 | /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */
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| 69 | nodname = buf;
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| 70 | S++;
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| 71 | Sminor++;
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| 72 | }
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| 73 |
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| 74 | return 0;
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| 75 | }
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| 76 |
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| 77 | #elif ENABLE_FEATURE_MAKEDEVS_TABLE
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| 78 |
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| 79 | /* Licensed under GPLv2 or later, see file LICENSE in this source tree. */
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| 80 |
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| 81 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 82 | int makedevs_main(int argc UNUSED_PARAM, char **argv)
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| 83 | {
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| 84 | parser_t *parser;
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| 85 | char *line = (char *)"-";
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| 86 | int ret = EXIT_SUCCESS;
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| 87 |
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| 88 | opt_complementary = "=1"; /* exactly one param */
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| 89 | getopt32(argv, "d:", &line);
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| 90 | argv += optind;
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| 91 |
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| 92 | xchdir(*argv); /* ensure root dir exists */
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| 93 |
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| 94 | umask(0);
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| 95 |
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| 96 | printf("rootdir=%s\ntable=", *argv);
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| 97 | if (NOT_LONE_DASH(line)) {
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| 98 | printf("'%s'\n", line);
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| 99 | } else {
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| 100 | puts("<stdin>");
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| 101 | }
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| 102 |
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| 103 | parser = config_open(line);
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| 104 | while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) {
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| 105 | int linenum;
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| 106 | char type;
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| 107 | unsigned mode = 0755;
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| 108 | unsigned major = 0;
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| 109 | unsigned minor = 0;
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| 110 | unsigned count = 0;
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| 111 | unsigned increment = 0;
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| 112 | unsigned start = 0;
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| 113 | char name[41];
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| 114 | char user[41];
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| 115 | char group[41];
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| 116 | char *full_name = name;
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| 117 | uid_t uid;
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| 118 | gid_t gid;
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| 119 |
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| 120 | linenum = parser->lineno;
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| 121 |
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| 122 | if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u",
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| 123 | name, &type, &mode, user, group,
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| 124 | &major, &minor, &start, &increment, &count))
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| 125 | || ((unsigned)(major | minor | start | count | increment) > 255)
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| 126 | ) {
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| 127 | bb_error_msg("invalid line %d: '%s'", linenum, line);
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| 128 | ret = EXIT_FAILURE;
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| 129 | continue;
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| 130 | }
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| 131 |
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| 132 | gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
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| 133 | uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
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| 134 | /* We are already in the right root dir,
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| 135 | * so make absolute paths relative */
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| 136 | if ('/' == *full_name)
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| 137 | full_name++;
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| 138 |
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| 139 | if (type == 'd') {
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| 140 | bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
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| 141 | if (chown(full_name, uid, gid) == -1) {
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| 142 | chown_fail:
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| 143 | bb_perror_msg("line %d: can't chown %s", linenum, full_name);
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| 144 | ret = EXIT_FAILURE;
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| 145 | continue;
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| 146 | }
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| 147 | if (chmod(full_name, mode) < 0) {
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| 148 | chmod_fail:
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| 149 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name);
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| 150 | ret = EXIT_FAILURE;
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| 151 | continue;
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| 152 | }
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| 153 | } else if (type == 'f') {
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| 154 | struct stat st;
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| 155 | if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
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| 156 | bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
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| 157 | ret = EXIT_FAILURE;
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| 158 | continue;
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| 159 | }
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| 160 | if (chown(full_name, uid, gid) < 0)
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| 161 | goto chown_fail;
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| 162 | if (chmod(full_name, mode) < 0)
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| 163 | goto chmod_fail;
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| 164 | } else {
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| 165 | dev_t rdev;
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| 166 | unsigned i;
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| 167 | char *full_name_inc;
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| 168 |
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| 169 | if (type == 'p') {
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| 170 | mode |= S_IFIFO;
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| 171 | } else if (type == 'c') {
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| 172 | mode |= S_IFCHR;
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| 173 | } else if (type == 'b') {
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| 174 | mode |= S_IFBLK;
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| 175 | } else {
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| 176 | bb_error_msg("line %d: unsupported file type %c", linenum, type);
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| 177 | ret = EXIT_FAILURE;
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| 178 | continue;
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| 179 | }
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| 180 |
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| 181 | full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2);
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| 182 | if (count)
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| 183 | count--;
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| 184 | for (i = start; i <= start + count; i++) {
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| 185 | sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i);
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| 186 | rdev = makedev(major, minor + (i - start) * increment);
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| 187 | if (mknod(full_name_inc, mode, rdev) < 0) {
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| 188 | bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc);
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| 189 | ret = EXIT_FAILURE;
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| 190 | } else if (chown(full_name_inc, uid, gid) < 0) {
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| 191 | bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc);
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| 192 | ret = EXIT_FAILURE;
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| 193 | } else if (chmod(full_name_inc, mode) < 0) {
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| 194 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc);
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| 195 | ret = EXIT_FAILURE;
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| 196 | }
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| 197 | }
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| 198 | free(full_name_inc);
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| 199 | }
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| 200 | }
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| 201 | if (ENABLE_FEATURE_CLEAN_UP)
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| 202 | config_close(parser);
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| 203 |
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| 204 | return ret;
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| 205 | }
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| 206 |
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| 207 | #else
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| 208 | # error makedevs configuration error, either leaf or table must be selected
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| 209 | #endif
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