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