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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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