1 files changed, 121 insertions, 0 deletions
diff --git a/busybox/miscutils/mt.c b/busybox/miscutils/mt.c
new file mode 100644
index 0000000..b0cdacc
--- /dev/null
+++ b/busybox/miscutils/mt.c
@@ -0,0 +1,121 @@
+/* vi: set sw=4 ts=4: */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mtio.h>
+#include <sys/fcntl.h>
+#include "busybox.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}
+};
+
+extern 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 = atoi(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;
+	}
+
+	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 EXIT_SUCCESS;
+}