busybox/miscutils/mt.c

/* vi: set sw=4 ts=4: */
/*
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "busybox.h"
#include <sys/mtio.h>

struct mt_opcodes {
	char *name;
	short value;
};

/* missing: eod/seod, stoptions, stwrthreshold, densities */
static const struct mt_opcodes opcodes[] = {
	{"bsf", MTBSF},
	{"bsfm", MTBSFM},
	{"bsr", MTBSR},
	{"bss", MTBSS},
	{"datacompression", MTCOMPRESSION},
	{"eom", MTEOM},
	{"erase", MTERASE},
	{"fsf", MTFSF},
	{"fsfm", MTFSFM},
	{"fsr", MTFSR},
	{"fss", MTFSS},
	{"load", MTLOAD},
	{"lock", MTLOCK},
	{"mkpart", MTMKPART},
	{"nop", MTNOP},
	{"offline", MTOFFL},
	{"rewoffline", MTOFFL},
	{"ras1", MTRAS1},
	{"ras2", MTRAS2},
	{"ras3", MTRAS3},
	{"reset", MTRESET},
	{"retension", MTRETEN},
	{"rewind", MTREW},
	{"seek", MTSEEK},
	{"setblk", MTSETBLK},
	{"setdensity", MTSETDENSITY},
	{"drvbuffer", MTSETDRVBUFFER},
	{"setpart", MTSETPART},
	{"tell", MTTELL},
	{"wset", MTWSM},
	{"unload", MTUNLOAD},
	{"unlock", MTUNLOCK},
	{"eof", MTWEOF},
	{"weof", MTWEOF},
	{0, 0}
};

int mt_main(int argc, char **argv)
{
	const char *file = "/dev/tape";
	const struct mt_opcodes *code = opcodes;
	struct mtop op;
	struct mtpos position;
	int fd, mode;

	if (argc < 2) {
		bb_show_usage();
	}

	if (strcmp(argv[1], "-f") == 0) {
		if (argc < 4) {
			bb_show_usage();
		}
		file = argv[2];
		argv += 2;
		argc -= 2;
	}

	while (code->name != 0) {
		if (strcmp(code->name, argv[1]) == 0)
			break;
		code++;
	}

	if (code->name == 0) {
		bb_error_msg("unrecognized opcode %s", argv[1]);
		return EXIT_FAILURE;
	}

	op.mt_op = code->value;
	if (argc >= 3)
		op.mt_count = xatoi_u(argv[2]);
	else
		op.mt_count = 1;		/* One, not zero, right? */

	switch (code->value) {
		case MTWEOF:
		case MTERASE:
		case MTWSM:
		case MTSETDRVBUFFER:
			mode = O_WRONLY;
			break;

		default:
			mode = O_RDONLY;
			break;
	}

	fd = xopen(file, mode);

	switch (code->value) {
		case MTTELL:
			if (ioctl(fd, MTIOCPOS, &position) < 0)
				bb_perror_msg_and_die("%s", file);
			printf("At block %d.\n", (int) position.mt_blkno);
			break;

		default:
			if (ioctl(fd, MTIOCTOP, &op) != 0)
				bb_perror_msg_and_die("%s", file);
			break;
	}

	return EXIT_SUCCESS;
}
1	niro	532	/* 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 "busybox.h"
7			#include <sys/mtio.h>
8
9			struct mt_opcodes {
10			char *name;
11			short value;
12			};
13
14			/* missing: eod/seod, stoptions, stwrthreshold, densities */
15			static const struct mt_opcodes opcodes[] = {
16			{"bsf", MTBSF},
17			{"bsfm", MTBSFM},
18			{"bsr", MTBSR},
19			{"bss", MTBSS},
20			{"datacompression", MTCOMPRESSION},
21			{"eom", MTEOM},
22			{"erase", MTERASE},
23			{"fsf", MTFSF},
24			{"fsfm", MTFSFM},
25			{"fsr", MTFSR},
26			{"fss", MTFSS},
27			{"load", MTLOAD},
28			{"lock", MTLOCK},
29			{"mkpart", MTMKPART},
30			{"nop", MTNOP},
31			{"offline", MTOFFL},
32			{"rewoffline", MTOFFL},
33			{"ras1", MTRAS1},
34			{"ras2", MTRAS2},
35			{"ras3", MTRAS3},
36			{"reset", MTRESET},
37			{"retension", MTRETEN},
38			{"rewind", MTREW},
39			{"seek", MTSEEK},
40			{"setblk", MTSETBLK},
41			{"setdensity", MTSETDENSITY},
42			{"drvbuffer", MTSETDRVBUFFER},
43			{"setpart", MTSETPART},
44			{"tell", MTTELL},
45			{"wset", MTWSM},
46			{"unload", MTUNLOAD},
47			{"unlock", MTUNLOCK},
48			{"eof", MTWEOF},
49			{"weof", MTWEOF},
50			{0, 0}
51			};
52
53			int mt_main(int argc, char **argv)
54			{
55			const char *file = "/dev/tape";
56			const struct mt_opcodes *code = opcodes;
57			struct mtop op;
58			struct mtpos position;
59			int fd, mode;
60
61			if (argc < 2) {
62			bb_show_usage();
63			}
64
65			if (strcmp(argv[1], "-f") == 0) {
66			if (argc < 4) {
67			bb_show_usage();
68			}
69			file = argv[2];
70			argv += 2;
71			argc -= 2;
72			}
73
74			while (code->name != 0) {
75			if (strcmp(code->name, argv[1]) == 0)
76			break;
77			code++;
78			}
79
80			if (code->name == 0) {
81			bb_error_msg("unrecognized opcode %s", argv[1]);
82			return EXIT_FAILURE;
83			}
84
85			op.mt_op = code->value;
86			if (argc >= 3)
87			op.mt_count = xatoi_u(argv[2]);
88			else
89			op.mt_count = 1; /* One, not zero, right? */
90
91			switch (code->value) {
92			case MTWEOF:
93			case MTERASE:
94			case MTWSM:
95			case MTSETDRVBUFFER:
96			mode = O_WRONLY;
97			break;
98
99			default:
100			mode = O_RDONLY;
101			break;
102			}
103
104			fd = xopen(file, mode);
105
106			switch (code->value) {
107			case MTTELL:
108			if (ioctl(fd, MTIOCPOS, &position) < 0)
109			bb_perror_msg_and_die("%s", file);
110			printf("At block %d.\n", (int) position.mt_blkno);
111			break;
112
113			default:
114			if (ioctl(fd, MTIOCTOP, &op) != 0)
115			bb_perror_msg_and_die("%s", file);
116			break;
117			}
118
119			return EXIT_SUCCESS;
120			}