X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=miscutils%2Fmt.c;h=368fc66b9f586653960fb6435e1762fb01d1ba16;hb=3a2b103eea9f87fa476b1f8c4ed4a11b7422eab8;hp=4ab4782703551363cb73088ab76a6a5ba04e13ac;hpb=d537a95fdbc0b4a5f38edea8593b4c085fdd7fcb;p=oweals%2Fbusybox.git

diff --git a/miscutils/mt.c b/miscutils/mt.c
index 4ab478270..368fc66b9 100644
--- a/miscutils/mt.c
+++ b/miscutils/mt.c
@@ -1,14 +1,10 @@
 /* vi: set sw=4 ts=4: */
-#include "internal.h"
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/mtio.h>
 #include <sys/fcntl.h>
-
-static const char mt_usage[] = "mt [-f device] opcode value\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-			"\nControl magnetic tape drive operation\n"
-#endif
-			;
+#include "busybox.h"
 
 struct mt_opcodes {
 	char *name;
@@ -39,7 +35,7 @@ static const struct mt_opcodes opcodes[] = {
 	{"ras3", MTRAS3},
 	{"reset", MTRESET},
 	{"retension", MTRETEN},
-	{"rew", MTREW},
+	{"rewind", MTREW},
 	{"seek", MTSEEK},
 	{"setblk", MTSETBLK},
 	{"setdensity", MTSETDENSITY},
@@ -54,20 +50,21 @@ static const struct mt_opcodes opcodes[] = {
 	{0, 0}
 };
 
-extern int mt_main(int argc, char **argv)
+int mt_main(int argc, char **argv)
 {
 	const char *file = "/dev/tape";
 	const struct mt_opcodes *code = opcodes;
 	struct mtop op;
-	int fd;
-	
-	if ((argc != 2 && argc != 3) && **(argv + 1) != '-') {
-		usage(mt_usage);
+	struct mtpos position;
+	int fd, mode;
+
+	if (argc < 2) {
+		bb_show_usage();
 	}
 
 	if (strcmp(argv[1], "-f") == 0) {
 		if (argc < 4) {
-			usage(mt_usage);
+			bb_show_usage();
 		}
 		file = argv[2];
 		argv += 2;
@@ -81,8 +78,8 @@ extern int mt_main(int argc, char **argv)
 	}
 
 	if (code->name == 0) {
-		errorMsg("unrecognized opcode %s.\n", argv[1]);
-		exit (FALSE);
+		bb_error_msg("unrecognized opcode %s.", argv[1]);
+		return EXIT_FAILURE;
 	}
 
 	op.mt_op = code->value;
@@ -91,15 +88,33 @@ extern int mt_main(int argc, char **argv)
 	else
 		op.mt_count = 1;		/* One, not zero, right? */
 
-	if ((fd = open(file, O_RDONLY, 0)) < 0) {
-		perror(file);
-		exit (FALSE);
+	switch (code->value) {
+		case MTWEOF:
+		case MTERASE:
+		case MTWSM:
+		case MTSETDRVBUFFER:
+			mode = O_WRONLY;
+			break;
+
+		default:
+			mode = O_RDONLY;
+			break;
 	}
 
-	if (ioctl(fd, MTIOCTOP, &op) != 0) {
-		perror(file);
-		exit (FALSE);
+	fd = bb_xopen3(file, mode, 0);
+
+	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 (TRUE);
+	return EXIT_SUCCESS;
 }