Initial revision

miscutils/mt.c

@@ -0,0 +1,98 @@
+#include "internal.h"
+#include <stdio.h>
+#include <sys/mtio.h>
+#include <sys/fcntl.h>
+
+const char	mt_usage[] = "mt [-f device] opcode value\n";
+
+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 },
+	{ "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 }
+};
+
+extern int
+mt_main(struct FileInfo * i, int argc, char * * argv)
+{
+	const char *				file = "/dev/tape";
+	const struct mt_opcodes *	code = opcodes;
+	struct mtop					op;
+	int							fd;
+	
+	if ( strcmp(argv[1], "-f") == 0 ) {
+		if ( argc < 4 ) {
+			usage(mt_usage);
+			return 1;
+		}
+		file = argv[2];
+		argv += 2;
+		argc -= 2;
+	}
+
+	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;
+	}
+
+	op.mt_op = code->value;
+	if ( argc >= 3 )
+		op.mt_count = atoi(argv[2]); 
+	else
+		op.mt_count = 1; /* One, not zero, right? */
+
+	if ( (fd = open(file, O_RDONLY, 0)) < 0 ) {
+		name_and_error(file);
+		return 1;
+	}
+
+	if ( ioctl(fd, MTIOCTOP, &op) != 0 ) {
+		name_and_error(file);
+		return 1;
+	}
+
+	return 0;
+}