[821] | 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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[3232] | 10 | //usage:#if ENABLE_FEATURE_MAKEDEVS_LEAF
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| 11 | //usage:#define makedevs_trivial_usage
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| 12 | //usage: "NAME TYPE MAJOR MINOR FIRST LAST [s]"
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| 13 | //usage:#define makedevs_full_usage "\n\n"
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| 14 | //usage: "Create a range of block or character special files"
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| 15 | //usage: "\n"
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| 16 | //usage: "\nTYPE is:"
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| 17 | //usage: "\n b Block device"
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| 18 | //usage: "\n c Character device"
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| 19 | //usage: "\n f FIFO, MAJOR and MINOR are ignored"
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| 20 | //usage: "\n"
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| 21 | //usage: "\nFIRST..LAST specify numbers appended to NAME."
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| 22 | //usage: "\nIf 's' is the last argument, the base device is created as well."
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| 23 | //usage: "\n"
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| 24 | //usage: "\nExamples:"
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| 25 | //usage: "\n makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63"
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| 26 | //usage: "\n makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8"
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| 27 | //usage:
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| 28 | //usage:#define makedevs_example_usage
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| 29 | //usage: "# makedevs /dev/ttyS c 4 66 2 63\n"
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| 30 | //usage: "[creates ttyS2-ttyS63]\n"
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| 31 | //usage: "# makedevs /dev/hda b 3 0 0 8 s\n"
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| 32 | //usage: "[creates hda,hda1-hda8]\n"
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| 33 | //usage:#endif
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| 34 | //usage:
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| 35 | //usage:#if ENABLE_FEATURE_MAKEDEVS_TABLE
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| 36 | //usage:#define makedevs_trivial_usage
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| 37 | //usage: "[-d device_table] rootdir"
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| 38 | //usage:#define makedevs_full_usage "\n\n"
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| 39 | //usage: "Create a range of special files as specified in a device table.\n"
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| 40 | //usage: "Device table entries take the form of:\n"
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| 41 | //usage: "<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>\n"
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| 42 | //usage: "Where name is the file name, type can be one of:\n"
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| 43 | //usage: " f Regular file\n"
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| 44 | //usage: " d Directory\n"
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| 45 | //usage: " c Character device\n"
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| 46 | //usage: " b Block device\n"
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| 47 | //usage: " p Fifo (named pipe)\n"
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| 48 | //usage: "uid is the user id for the target file, gid is the group id for the\n"
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| 49 | //usage: "target file. The rest of the entries (major, minor, etc) apply to\n"
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| 50 | //usage: "to device special files. A '-' may be used for blank entries."
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| 51 | //usage:
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| 52 | //usage:#define makedevs_example_usage
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| 53 | //usage: "For example:\n"
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| 54 | //usage: "<name> <type> <mode><uid><gid><major><minor><start><inc><count>\n"
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| 55 | //usage: "/dev d 755 0 0 - - - - -\n"
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| 56 | //usage: "/dev/console c 666 0 0 5 1 - - -\n"
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| 57 | //usage: "/dev/null c 666 0 0 1 3 0 0 -\n"
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| 58 | //usage: "/dev/zero c 666 0 0 1 5 0 0 -\n"
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| 59 | //usage: "/dev/hda b 640 0 0 3 0 0 0 -\n"
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| 60 | //usage: "/dev/hda b 640 0 0 3 1 1 1 15\n\n"
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| 61 | //usage: "Will Produce:\n"
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| 62 | //usage: "/dev\n"
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| 63 | //usage: "/dev/console\n"
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| 64 | //usage: "/dev/null\n"
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| 65 | //usage: "/dev/zero\n"
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| 66 | //usage: "/dev/hda\n"
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| 67 | //usage: "/dev/hda[0-15]\n"
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| 68 | //usage:#endif
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| 69 |
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[1765] | 70 | #include "libbb.h"
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[821] | 71 |
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[1765] | 72 | #if ENABLE_FEATURE_MAKEDEVS_LEAF
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[2725] | 73 | /*
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| 74 | makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]
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| 75 | TYPEs:
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| 76 | b Block device
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| 77 | c Character device
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| 78 | f FIFO
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| 79 |
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| 80 | FIRST..LAST specify numbers appended to NAME.
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| 81 | If 's' is the last argument, the base device is created as well.
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| 82 | Examples:
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| 83 | makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63
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| 84 | makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8
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| 85 | */
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| 86 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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[821] | 87 | int makedevs_main(int argc, char **argv)
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| 88 | {
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| 89 | mode_t mode;
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[2725] | 90 | char *basedev, *type, *nodname, *buf;
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[821] | 91 | int Smajor, Sminor, S, E;
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| 92 |
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[2725] | 93 | if (argc < 7 || argv[1][0] == '-')
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[821] | 94 | bb_show_usage();
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| 95 |
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| 96 | basedev = argv[1];
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[2725] | 97 | buf = xasprintf("%s%u", argv[1], (unsigned)-1);
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[821] | 98 | type = argv[2];
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[2725] | 99 | Smajor = xatoi_positive(argv[3]);
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| 100 | Sminor = xatoi_positive(argv[4]);
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| 101 | S = xatoi_positive(argv[5]);
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| 102 | E = xatoi_positive(argv[6]);
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| 103 | nodname = argv[7] ? basedev : buf;
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[821] | 104 |
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| 105 | mode = 0660;
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| 106 | switch (type[0]) {
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| 107 | case 'c':
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| 108 | mode |= S_IFCHR;
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| 109 | break;
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| 110 | case 'b':
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| 111 | mode |= S_IFBLK;
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| 112 | break;
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| 113 | case 'f':
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| 114 | mode |= S_IFIFO;
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| 115 | break;
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| 116 | default:
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| 117 | bb_show_usage();
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| 118 | }
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| 119 |
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| 120 | while (S <= E) {
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[2725] | 121 | sprintf(buf, "%s%u", basedev, S);
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[821] | 122 |
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[2725] | 123 | /* if mode != S_IFCHR and != S_IFBLK,
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| 124 | * third param in mknod() ignored */
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[821] | 125 | if (mknod(nodname, mode, makedev(Smajor, Sminor)))
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[2725] | 126 | bb_perror_msg("can't create '%s'", nodname);
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[821] | 127 |
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[2725] | 128 | /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */
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[821] | 129 | nodname = buf;
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| 130 | S++;
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| 131 | Sminor++;
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| 132 | }
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| 133 |
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| 134 | return 0;
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| 135 | }
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| 136 |
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[1765] | 137 | #elif ENABLE_FEATURE_MAKEDEVS_TABLE
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[821] | 138 |
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[2725] | 139 | /* Licensed under GPLv2 or later, see file LICENSE in this source tree. */
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[821] | 140 |
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[2725] | 141 | int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 142 | int makedevs_main(int argc UNUSED_PARAM, char **argv)
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[821] | 143 | {
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[2725] | 144 | parser_t *parser;
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| 145 | char *line = (char *)"-";
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[821] | 146 | int ret = EXIT_SUCCESS;
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| 147 |
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[2725] | 148 | opt_complementary = "=1"; /* exactly one param */
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[1765] | 149 | getopt32(argv, "d:", &line);
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[2725] | 150 | argv += optind;
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[821] | 151 |
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[2725] | 152 | xchdir(*argv); /* ensure root dir exists */
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[821] | 153 |
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| 154 | umask(0);
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| 155 |
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[2725] | 156 | printf("rootdir=%s\ntable=", *argv);
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| 157 | if (NOT_LONE_DASH(line)) {
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| 158 | printf("'%s'\n", line);
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[821] | 159 | } else {
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[2725] | 160 | puts("<stdin>");
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[821] | 161 | }
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| 162 |
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[2725] | 163 | parser = config_open(line);
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| 164 | while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) {
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| 165 | int linenum;
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[821] | 166 | char type;
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[2725] | 167 | unsigned mode = 0755;
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| 168 | unsigned major = 0;
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| 169 | unsigned minor = 0;
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| 170 | unsigned count = 0;
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| 171 | unsigned increment = 0;
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| 172 | unsigned start = 0;
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[821] | 173 | char name[41];
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| 174 | char user[41];
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| 175 | char group[41];
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[2725] | 176 | char *full_name = name;
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[821] | 177 | uid_t uid;
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| 178 | gid_t gid;
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| 179 |
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[2725] | 180 | linenum = parser->lineno;
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[821] | 181 |
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[2725] | 182 | if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u",
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| 183 | name, &type, &mode, user, group,
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| 184 | &major, &minor, &start, &increment, &count))
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| 185 | || ((unsigned)(major | minor | start | count | increment) > 255)
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| 186 | ) {
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| 187 | bb_error_msg("invalid line %d: '%s'", linenum, line);
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[821] | 188 | ret = EXIT_FAILURE;
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| 189 | continue;
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| 190 | }
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| 191 |
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[1765] | 192 | gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
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| 193 | uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
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[2725] | 194 | /* We are already in the right root dir,
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| 195 | * so make absolute paths relative */
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| 196 | if ('/' == *full_name)
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| 197 | full_name++;
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[821] | 198 |
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| 199 | if (type == 'd') {
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| 200 | bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
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| 201 | if (chown(full_name, uid, gid) == -1) {
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[2725] | 202 | chown_fail:
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| 203 | bb_perror_msg("line %d: can't chown %s", linenum, full_name);
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[821] | 204 | ret = EXIT_FAILURE;
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[2725] | 205 | continue;
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[821] | 206 | }
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[2725] | 207 | if (chmod(full_name, mode) < 0) {
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| 208 | chmod_fail:
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| 209 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name);
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[821] | 210 | ret = EXIT_FAILURE;
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[2725] | 211 | continue;
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[821] | 212 | }
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| 213 | } else if (type == 'f') {
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| 214 | struct stat st;
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| 215 | if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
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| 216 | bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
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| 217 | ret = EXIT_FAILURE;
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[2725] | 218 | continue;
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[821] | 219 | }
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[2725] | 220 | if (chown(full_name, uid, gid) < 0)
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| 221 | goto chown_fail;
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| 222 | if (chmod(full_name, mode) < 0)
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| 223 | goto chmod_fail;
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[1765] | 224 | } else {
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[821] | 225 | dev_t rdev;
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[2725] | 226 | unsigned i;
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| 227 | char *full_name_inc;
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[821] | 228 |
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| 229 | if (type == 'p') {
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| 230 | mode |= S_IFIFO;
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[2725] | 231 | } else if (type == 'c') {
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[821] | 232 | mode |= S_IFCHR;
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[2725] | 233 | } else if (type == 'b') {
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[821] | 234 | mode |= S_IFBLK;
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| 235 | } else {
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| 236 | bb_error_msg("line %d: unsupported file type %c", linenum, type);
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| 237 | ret = EXIT_FAILURE;
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[2725] | 238 | continue;
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[821] | 239 | }
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| 240 |
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[2725] | 241 | full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2);
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| 242 | if (count)
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| 243 | count--;
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| 244 | for (i = start; i <= start + count; i++) {
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| 245 | sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i);
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| 246 | rdev = makedev(major, minor + (i - start) * increment);
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| 247 | if (mknod(full_name_inc, mode, rdev) < 0) {
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| 248 | bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc);
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[821] | 249 | ret = EXIT_FAILURE;
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[2725] | 250 | } else if (chown(full_name_inc, uid, gid) < 0) {
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| 251 | bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc);
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[821] | 252 | ret = EXIT_FAILURE;
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[2725] | 253 | } else if (chmod(full_name_inc, mode) < 0) {
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| 254 | bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc);
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[821] | 255 | ret = EXIT_FAILURE;
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| 256 | }
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| 257 | }
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[2725] | 258 | free(full_name_inc);
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[821] | 259 | }
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| 260 | }
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[2725] | 261 | if (ENABLE_FEATURE_CLEAN_UP)
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| 262 | config_close(parser);
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[821] | 263 |
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| 264 | return ret;
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| 265 | }
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| 266 |
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| 267 | #else
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| 268 | # error makedevs configuration error, either leaf or table must be selected
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| 269 | #endif
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