Diff of /trunk/mkinitrd-magellan/busybox/miscutils/mt.c

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	revision 815 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 3	Line 3
3	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
4	*/	*/
5
6	#include "busybox.h"	#include "libbb.h"
7	#include <sys/mtio.h>	#include <sys/mtio.h>
8
	struct mt_opcodes {
	char *name;
	short value;
	};
9	/* missing: eod/seod, stoptions, stwrthreshold, densities */	/* missing: eod/seod, stoptions, stwrthreshold, densities */
10	static const struct mt_opcodes opcodes[] = {	static const short opcode_value[] = {
11	{"bsf", MTBSF},	MTBSF,
12	{"bsfm", MTBSFM},	MTBSFM,
13	{"bsr", MTBSR},	MTBSR,
14	{"bss", MTBSS},	MTBSS,
15	{"datacompression", MTCOMPRESSION},	MTCOMPRESSION,
16	{"eom", MTEOM},	MTEOM,
17	{"erase", MTERASE},	MTERASE,
18	{"fsf", MTFSF},	MTFSF,
19	{"fsfm", MTFSFM},	MTFSFM,
20	{"fsr", MTFSR},	MTFSR,
21	{"fss", MTFSS},	MTFSS,
22	{"load", MTLOAD},	MTLOAD,
23	{"lock", MTLOCK},	MTLOCK,
24	{"mkpart", MTMKPART},	MTMKPART,
25	{"nop", MTNOP},	MTNOP,
26	{"offline", MTOFFL},	MTOFFL,
27	{"rewoffline", MTOFFL},	MTOFFL,
28	{"ras1", MTRAS1},	MTRAS1,
29	{"ras2", MTRAS2},	MTRAS2,
30	{"ras3", MTRAS3},	MTRAS3,
31	{"reset", MTRESET},	MTRESET,
32	{"retension", MTRETEN},	MTRETEN,
33	{"rewind", MTREW},	MTREW,
34	{"seek", MTSEEK},	MTSEEK,
35	{"setblk", MTSETBLK},	MTSETBLK,
36	{"setdensity", MTSETDENSITY},	MTSETDENSITY,
37	{"drvbuffer", MTSETDRVBUFFER},	MTSETDRVBUFFER,
38	{"setpart", MTSETPART},	MTSETPART,
39	{"tell", MTTELL},	MTTELL,
40	{"wset", MTWSM},	MTWSM,
41	{"unload", MTUNLOAD},	MTUNLOAD,
42	{"unlock", MTUNLOCK},	MTUNLOCK,
43	{"eof", MTWEOF},	MTWEOF,
44	{"weof", MTWEOF},	MTWEOF
	{0, 0}
45	};	};
46
47	int mt_main(int argc, char **argv)	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";	const char *file = "/dev/tape";
	const struct mt_opcodes *code = opcodes;
87	struct mtop op;	struct mtop op;
88	struct mtpos position;	struct mtpos position;
89	int fd, mode;	int fd, mode, idx;
90
91	if (argc < 2) {	if (!argv[1]) {
92	bb_show_usage();	bb_show_usage();
93	}	}
94
95	if (strcmp(argv[1], "-f") == 0) {	if (strcmp(argv[1], "-f") == 0) {
96	if (argc < 4) {	if (!argv[2] || !argv[3])
97	bb_show_usage();	bb_show_usage();
	}
98	file = argv[2];	file = argv[2];
99	argv += 2;	argv += 2;
	argc -= 2;
100	}	}
101
102	while (code->name != 0) {	idx = index_in_strings(opcode_name, argv[1]);
	if (strcmp(code->name, argv[1]) == 0)
	break;
	code++;
	}
103
104	if (code->name == 0) {	if (idx < 0)
105	bb_error_msg("unrecognized opcode %s", argv[1]);	bb_error_msg_and_die("unrecognized opcode %s", argv[1]);
	return EXIT_FAILURE;
	}
106
107	op.mt_op = code->value;	op.mt_op = opcode_value[idx];
108	if (argc >= 3)	if (argv[2])
109	op.mt_count = xatoi_u(argv[2]);	op.mt_count = xatoi_u(argv[2]);
110	else	else
111	op.mt_count = 1; /* One, not zero, right? */	op.mt_count = 1; /* One, not zero, right? */
112
113	switch (code->value) {	switch (opcode_value[idx]) {
114	case MTWEOF:	case MTWEOF:
115	case MTERASE:	case MTERASE:
116	case MTWSM:	case MTWSM:
#	Line 103  int mt_main(int argc, char **argv)	Line 125  int mt_main(int argc, char **argv)
125
126	fd = xopen(file, mode);	fd = xopen(file, mode);
127
128	switch (code->value) {	switch (opcode_value[idx]) {
129	case MTTELL:	case MTTELL:
130	if (ioctl(fd, MTIOCPOS, &position) < 0)	ioctl_or_perror_and_die(fd, MTIOCPOS, &position, "%s", file);
131	bb_perror_msg_and_die("%s", file);	printf("At block %d\n", (int) position.mt_blkno);
	printf("At block %d.\n", (int) position.mt_blkno);
132	break;	break;
133
134	default:	default:
135	if (ioctl(fd, MTIOCTOP, &op) != 0)	ioctl_or_perror_and_die(fd, MTIOCTOP, &op, "%s", file);
	bb_perror_msg_and_die("%s", file);
136	break;	break;
137	}	}
138

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