X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=miscutils%2Fmt.c;h=e7995455291d733c077409642fee73300e78fa13;hb=0d6d88a2058d191c34d25a8709aca40311bb0c2e;hp=7d75fbd3d50d9a298b0937cf07c6149a23735370;hpb=cc8ed39b240180b58810784f844e253263594ac3;p=oweals%2Fbusybox.git

diff --git a/miscutils/mt.c b/miscutils/mt.c
index 7d75fbd3d..e79954552 100644
--- a/miscutils/mt.c
+++ b/miscutils/mt.c
@@ -1,98 +1,121 @@
-#include "internal.h"
+/* vi: set sw=4 ts=4: */
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/mtio.h>
 #include <sys/fcntl.h>
-
-const char	mt_usage[] = "mt [-f device] opcode value\n";
+#include "busybox.h"
 
 struct mt_opcodes {
-	char *	name;
-	short	value;
+	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 },
-	{ "rew",	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 }
+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}
 };
 
-extern int
-mt_main(struct FileInfo * i, int argc, char * * argv)
+extern int mt_main(int argc, char **argv)
 {
-	const char *				file = "/dev/tape";
-	const struct mt_opcodes *	code = opcodes;
-	struct mtop					op;
-	int							fd;
+	const char *file = "/dev/tape";
+	const struct mt_opcodes *code = opcodes;
+	struct mtop op;
+	struct mtpos position;
+	int fd, mode;
 	
-	if ( strcmp(argv[1], "-f") == 0 ) {
-		if ( argc < 4 ) {
-			usage(mt_usage);
-			return 1;
+	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 )
+	while (code->name != 0) {
+		if (strcmp(code->name, argv[1]) == 0)
 			break;
 		code++;
 	}
 
-	if ( code->name == 0 ) {
-		fprintf(stderr, "mt: unrecognized opcode %s.\n", argv[1]);
-		return 1;
+	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 = atoi(argv[2]); 
+	if (argc >= 3)
+		op.mt_count = atoi(argv[2]);
 	else
-		op.mt_count = 1; /* One, not zero, right? */
+		op.mt_count = 1;		/* One, not zero, right? */
+
+	switch (code->value) {
+		case MTWEOF:
+		case MTERASE:
+		case MTWSM:
+		case MTSETDRVBUFFER:
+			mode = O_WRONLY;
+			break;
 
-	if ( (fd = open(file, O_RDONLY, 0)) < 0 ) {
-		name_and_error(file);
-		return 1;
+		default:
+			mode = O_RDONLY;
+			break;
 	}
 
-	if ( ioctl(fd, MTIOCTOP, &op) != 0 ) {
-		name_and_error(file);
-		return 1;
+	if ((fd = open(file, mode, 0)) < 0)
+		bb_perror_msg_and_die("%s", file);
+
+	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 0;
+	return EXIT_SUCCESS;
 }