/* 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;
{"ras3", MTRAS3},
{"reset", MTRESET},
{"retension", MTRETEN},
- {"rew", MTREW},
+ {"rewind", MTREW},
{"seek", MTSEEK},
{"setblk", MTSETBLK},
{"setdensity", MTSETDENSITY},
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;
}
if (code->name == 0) {
- fprintf(stderr, "mt: unrecognized opcode %s.\n", argv[1]);
- exit (FALSE);
+ bb_error_msg("unrecognized opcode %s.", argv[1]);
+ return EXIT_FAILURE;
}
op.mt_op = code->value;
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);
+ 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 (TRUE);
+ return EXIT_SUCCESS;
}