[821] | 1 | /* vi: set sw=4 ts=4: */
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[1765] | 2 | /*
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[2725] | 3 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[1765] | 4 | */
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| 5 |
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[3232] | 6 | //usage:#define mt_trivial_usage
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| 7 | //usage: "[-f device] opcode value"
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| 8 | //usage:#define mt_full_usage "\n\n"
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| 9 | //usage: "Control magnetic tape drive operation\n"
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| 10 | //usage: "\n"
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| 11 | //usage: "Available Opcodes:\n"
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| 12 | //usage: "\n"
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| 13 | //usage: "bsf bsfm bsr bss datacompression drvbuffer eof eom erase\n"
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| 14 | //usage: "fsf fsfm fsr fss load lock mkpart nop offline ras1 ras2\n"
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| 15 | //usage: "ras3 reset retension rewind rewoffline seek setblk setdensity\n"
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| 16 | //usage: "setpart tell unload unlock weof wset"
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| 17 |
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[1765] | 18 | #include "libbb.h"
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[821] | 19 | #include <sys/mtio.h>
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| 20 |
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| 21 | /* missing: eod/seod, stoptions, stwrthreshold, densities */
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[2725] | 22 | static const short opcode_value[] = {
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| 23 | MTBSF,
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| 24 | MTBSFM,
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| 25 | MTBSR,
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| 26 | MTBSS,
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| 27 | MTCOMPRESSION,
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| 28 | MTEOM,
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| 29 | MTERASE,
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| 30 | MTFSF,
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| 31 | MTFSFM,
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| 32 | MTFSR,
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| 33 | MTFSS,
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| 34 | MTLOAD,
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| 35 | MTLOCK,
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| 36 | MTMKPART,
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| 37 | MTNOP,
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| 38 | MTOFFL,
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| 39 | MTOFFL,
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| 40 | MTRAS1,
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| 41 | MTRAS2,
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| 42 | MTRAS3,
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| 43 | MTRESET,
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| 44 | MTRETEN,
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| 45 | MTREW,
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| 46 | MTSEEK,
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| 47 | MTSETBLK,
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| 48 | MTSETDENSITY,
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| 49 | MTSETDRVBUFFER,
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| 50 | MTSETPART,
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| 51 | MTTELL,
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| 52 | MTWSM,
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| 53 | MTUNLOAD,
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| 54 | MTUNLOCK,
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| 55 | MTWEOF,
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| 56 | MTWEOF
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[821] | 57 | };
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| 58 |
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[2725] | 59 | static const char opcode_name[] ALIGN1 =
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| 60 | "bsf" "\0"
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| 61 | "bsfm" "\0"
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| 62 | "bsr" "\0"
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| 63 | "bss" "\0"
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| 64 | "datacompression" "\0"
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| 65 | "eom" "\0"
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| 66 | "erase" "\0"
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| 67 | "fsf" "\0"
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| 68 | "fsfm" "\0"
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| 69 | "fsr" "\0"
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| 70 | "fss" "\0"
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| 71 | "load" "\0"
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| 72 | "lock" "\0"
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| 73 | "mkpart" "\0"
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| 74 | "nop" "\0"
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| 75 | "offline" "\0"
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| 76 | "rewoffline" "\0"
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| 77 | "ras1" "\0"
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| 78 | "ras2" "\0"
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| 79 | "ras3" "\0"
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| 80 | "reset" "\0"
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| 81 | "retension" "\0"
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| 82 | "rewind" "\0"
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| 83 | "seek" "\0"
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| 84 | "setblk" "\0"
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| 85 | "setdensity" "\0"
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| 86 | "drvbuffer" "\0"
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| 87 | "setpart" "\0"
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| 88 | "tell" "\0"
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| 89 | "wset" "\0"
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| 90 | "unload" "\0"
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| 91 | "unlock" "\0"
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| 92 | "eof" "\0"
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| 93 | "weof" "\0";
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| 94 |
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| 95 | int mt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 96 | int mt_main(int argc UNUSED_PARAM, char **argv)
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[821] | 97 | {
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| 98 | const char *file = "/dev/tape";
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| 99 | struct mtop op;
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| 100 | struct mtpos position;
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[2725] | 101 | int fd, mode, idx;
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[821] | 102 |
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[2725] | 103 | if (!argv[1]) {
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[821] | 104 | bb_show_usage();
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| 105 | }
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| 106 |
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| 107 | if (strcmp(argv[1], "-f") == 0) {
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[2725] | 108 | if (!argv[2] || !argv[3])
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[821] | 109 | bb_show_usage();
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| 110 | file = argv[2];
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| 111 | argv += 2;
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| 112 | }
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| 113 |
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[2725] | 114 | idx = index_in_strings(opcode_name, argv[1]);
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[821] | 115 |
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[2725] | 116 | if (idx < 0)
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| 117 | bb_error_msg_and_die("unrecognized opcode %s", argv[1]);
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[821] | 118 |
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[2725] | 119 | op.mt_op = opcode_value[idx];
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| 120 | if (argv[2])
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| 121 | op.mt_count = xatoi_positive(argv[2]);
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[821] | 122 | else
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[2725] | 123 | op.mt_count = 1; /* One, not zero, right? */
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[821] | 124 |
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[2725] | 125 | switch (opcode_value[idx]) {
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[821] | 126 | case MTWEOF:
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| 127 | case MTERASE:
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| 128 | case MTWSM:
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| 129 | case MTSETDRVBUFFER:
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| 130 | mode = O_WRONLY;
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| 131 | break;
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| 132 |
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| 133 | default:
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| 134 | mode = O_RDONLY;
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| 135 | break;
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| 136 | }
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| 137 |
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[1765] | 138 | fd = xopen(file, mode);
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[821] | 139 |
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[2725] | 140 | switch (opcode_value[idx]) {
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[821] | 141 | case MTTELL:
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[1765] | 142 | ioctl_or_perror_and_die(fd, MTIOCPOS, &position, "%s", file);
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[2725] | 143 | printf("At block %d\n", (int) position.mt_blkno);
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[821] | 144 | break;
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| 145 |
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| 146 | default:
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[1765] | 147 | ioctl_or_perror_and_die(fd, MTIOCTOP, &op, "%s", file);
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[821] | 148 | break;
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| 149 | }
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| 150 |
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| 151 | return EXIT_SUCCESS;
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| 152 | }
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