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1.1 root 1: static char *sccsid = "@(#)mt.c 4.2 (Berkeley) 81/07/05";
2:
3: /*
4: * mt
5: */
6:
7: #include <stdio.h>
8: #include <ctype.h>
9: #include <sys/types.h>
10: #include <sys/mtio.h>
11:
12: struct commands {
13: char *c_name;
14: int c_code;
15: int c_ronly;
16: } com[] = {
17: "eof", MTWEOF, 0,
18: "fsf", MTFSF, 1,
19: "bsf", MTBSF, 1,
20: "fsr", MTFSR, 1,
21: "bsr", MTBSR, 1,
22: "rewind", MTREW, 1,
23: "offline", MTOFFL, 1,
24: "reset", MTRST, 1,
25: 0,0
26: };
27:
28: int mtfd;
29: struct mtop mt_com;
30: char *tape;
31:
32: main(argc, argv)
33: char **argv;
34: {
35: char line[80], *getenv();
36: register char *cp;
37: register struct commands *comp;
38:
39: if (argc < 2) {
40: fprintf(stderr, "usage: mt [ -t tape ] command [ count ]\n");
41: exit(1);
42: }
43: if ((strcmp(argv[1], "-t") == 0) && argc > 2) {
44: argc -= 2;
45: tape = argv[2];
46: argv += 2;
47: } else
48: if ((tape = getenv("TAPE")) == NULL)
49: tape = "/dev/nrmt1";
50: cp = argv[1];
51: for (comp = com; comp->c_name != NULL; comp++)
52: if (strncmp(cp, comp->c_name, strlen(cp)) == 0)
53: break;
54: if (comp->c_name == NULL) {
55: fprintf(stderr, "mt: don't grok \"%s\"\n", cp);
56: exit(1);
57: }
58: if ((mtfd = open(tape, comp->c_ronly ? 0 : 2)) < 0) {
59: perror(tape);
60: exit(1);
61: }
62: mt_com.mt_count = (argc > 2 ? atoi(argv[2]) : 1);
63: mt_com.mt_op = comp->c_code;
64: if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) {
65: fprintf(stderr, "%s %d ", comp->c_name, mt_com.mt_count);
66: perror("failed");
67: }
68: }
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