Contents of /tags/mkinitrd-6_1_9/busybox/miscutils/mt.c
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Wed Oct 28 00:26:51 2009 UTC (14 years, 11 months ago) by niro
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Wed Oct 28 00:26:51 2009 UTC (14 years, 11 months ago) by niro
File MIME type: text/plain
File size: 2548 byte(s)
tagged 'mkinitrd-6_1_9'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
4 | */ |
5 | |
6 | #include "libbb.h" |
7 | #include <sys/mtio.h> |
8 | |
9 | /* missing: eod/seod, stoptions, stwrthreshold, densities */ |
10 | static const short opcode_value[] = { |
11 | MTBSF, |
12 | MTBSFM, |
13 | MTBSR, |
14 | MTBSS, |
15 | MTCOMPRESSION, |
16 | MTEOM, |
17 | MTERASE, |
18 | MTFSF, |
19 | MTFSFM, |
20 | MTFSR, |
21 | MTFSS, |
22 | MTLOAD, |
23 | MTLOCK, |
24 | MTMKPART, |
25 | MTNOP, |
26 | MTOFFL, |
27 | MTOFFL, |
28 | MTRAS1, |
29 | MTRAS2, |
30 | MTRAS3, |
31 | MTRESET, |
32 | MTRETEN, |
33 | MTREW, |
34 | MTSEEK, |
35 | MTSETBLK, |
36 | MTSETDENSITY, |
37 | MTSETDRVBUFFER, |
38 | MTSETPART, |
39 | MTTELL, |
40 | MTWSM, |
41 | MTUNLOAD, |
42 | MTUNLOCK, |
43 | MTWEOF, |
44 | MTWEOF |
45 | }; |
46 | |
47 | static const char opcode_name[] ALIGN1 = |
48 | "bsf" "\0" |
49 | "bsfm" "\0" |
50 | "bsr" "\0" |
51 | "bss" "\0" |
52 | "datacompression" "\0" |
53 | "eom" "\0" |
54 | "erase" "\0" |
55 | "fsf" "\0" |
56 | "fsfm" "\0" |
57 | "fsr" "\0" |
58 | "fss" "\0" |
59 | "load" "\0" |
60 | "lock" "\0" |
61 | "mkpart" "\0" |
62 | "nop" "\0" |
63 | "offline" "\0" |
64 | "rewoffline" "\0" |
65 | "ras1" "\0" |
66 | "ras2" "\0" |
67 | "ras3" "\0" |
68 | "reset" "\0" |
69 | "retension" "\0" |
70 | "rewind" "\0" |
71 | "seek" "\0" |
72 | "setblk" "\0" |
73 | "setdensity" "\0" |
74 | "drvbuffer" "\0" |
75 | "setpart" "\0" |
76 | "tell" "\0" |
77 | "wset" "\0" |
78 | "unload" "\0" |
79 | "unlock" "\0" |
80 | "eof" "\0" |
81 | "weof" "\0"; |
82 | |
83 | int mt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
84 | int mt_main(int argc UNUSED_PARAM, char **argv) |
85 | { |
86 | const char *file = "/dev/tape"; |
87 | struct mtop op; |
88 | struct mtpos position; |
89 | int fd, mode, idx; |
90 | |
91 | if (!argv[1]) { |
92 | bb_show_usage(); |
93 | } |
94 | |
95 | if (strcmp(argv[1], "-f") == 0) { |
96 | if (!argv[2] || !argv[3]) |
97 | bb_show_usage(); |
98 | file = argv[2]; |
99 | argv += 2; |
100 | } |
101 | |
102 | idx = index_in_strings(opcode_name, argv[1]); |
103 | |
104 | if (idx < 0) |
105 | bb_error_msg_and_die("unrecognized opcode %s", argv[1]); |
106 | |
107 | op.mt_op = opcode_value[idx]; |
108 | if (argv[2]) |
109 | op.mt_count = xatoi_u(argv[2]); |
110 | else |
111 | op.mt_count = 1; /* One, not zero, right? */ |
112 | |
113 | switch (opcode_value[idx]) { |
114 | case MTWEOF: |
115 | case MTERASE: |
116 | case MTWSM: |
117 | case MTSETDRVBUFFER: |
118 | mode = O_WRONLY; |
119 | break; |
120 | |
121 | default: |
122 | mode = O_RDONLY; |
123 | break; |
124 | } |
125 | |
126 | fd = xopen(file, mode); |
127 | |
128 | switch (opcode_value[idx]) { |
129 | case MTTELL: |
130 | ioctl_or_perror_and_die(fd, MTIOCPOS, &position, "%s", file); |
131 | printf("At block %d\n", (int) position.mt_blkno); |
132 | break; |
133 | |
134 | default: |
135 | ioctl_or_perror_and_die(fd, MTIOCTOP, &op, "%s", file); |
136 | break; |
137 | } |
138 | |
139 | return EXIT_SUCCESS; |
140 | } |