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/* mt -- control magnetic tape drive operation
Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* Modified for the Linux SCSI tape driver by Brian Mays from code
written by Kai Makisara.
Last Modified: Tue Apr 23 15:37:54 EDT 1996
*/
/* If -f is not given, the environment variable TAPE is used;
if that is not set, a default device defined in sys/mtio.h is used.
The device must be either a character special file or a remote
tape drive with the form "[user@]system:path".
The default count is 1. Some operations ignore it.
Exit status:
0 success
1 invalid operation or device name
2 operation failed
Operations (unique abbreviations are accepted):
eof, weof Write COUNT EOF marks at current position on tape.
fsf Forward space COUNT files.
Tape is positioned on the first block of the file.
bsf Backward space COUNT files.
Tape is positioned on the first block of the file.
fsr Forward space COUNT records.
bsr Backward space COUNT records.
bsfm Backward space COUNT file marks.
Tape is positioned on the beginning-of-the-tape side of
the file mark.
asf Absolute space to file number COUNT.
Equivalent to rewind followed by fsf COUNT.
eom Space to the end of the recorded media on the tape
(for appending files onto tapes).
rewind Rewind the tape.
offline, rewoffl
Rewind the tape and, if applicable, unload the tape.
status Print status information about the tape unit.
retension Rewind the tape, then wind it to the end of the reel,
then rewind it again.
erase Erase the tape.
fss (SCSI tapes) Forward space COUNT setmarks.
bss (SCSI tapes) Backward space COUNT setmarks.
wset (SCSI tapes) Write COUNT setmarks at current position
(only SCSI tape).
eod, seod Space to end of valid data. Used on streamer tape
drives to append data to the logical and of tape.
setblk (SCSI tapes) Set the block size of the drive to COUNT
bytes per record.
setdensity (SCSI tapes) Set the tape density code to COUNT. The
proper codes to use with each drive should be looked
up from the drive documentation.
drvbuffer (SCSI tapes) Set the tape drive buffer code to
NUMBER. The proper value for unbuffered operation is
zero and "normal" buffered operation one. The meanings
of other values can be found in the drive
documentation or, in case of a SCSI-2 drive, from the
SCSI-2 standard.
stoptions (SCSI tapes) Set the driver options bits to COUNT for
the device. The bits can be set by oring the
following values: 1 to enable write buffering, 2 to
enable asynchronous writes, 4 to enable read ahead, 8
to enable debugging output (if it has been compiled to
the driver).
stwrthreshold
(SCSI tapes) The write threshold for the tape device
is set to COUNT kilobytes. The value must be smaller
than or equal to the driver buffer size.
seek (SCSI tapes) Seek to the COUNT block on the tape.
This operation is available on some Tandberg and
Wangtek streamers and some SCSI-2 tape drives.
tell (SCSI tapes) Tell the current block on tape. This
operation is available on some Tandberg and Wangtek
streamers and some SCSI-2 tape drives.
densities (SCSI tapes) Write explanation of some common density
codes to standard output.
datcompression
(some SCSI-2 DAT tapes) Inquire or set the compression
status (on/off). If the COUNT is one the compression
status is printed. If the COUNT is zero, compression
is disabled. Otherwise, compression is enabled.
David MacKenzie <djm@gnu.ai.mit.edu> */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_MTIO_H
#ifdef HAVE_SYS_IO_TRIOCTL_H
#include <sys/io/trioctl.h>
#endif
#include <sys/mtio.h>
#endif
#include <sys/file.h>
#include <fcntl.h>
#include <errno.h>
#include <getopt.h>
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include "rmt.h"
#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
#include <string.h>
#else
#include <strings.h>
#endif
#if defined(STDC_HEADERS)
#include <stdlib.h>
#else
extern int errno;
char *getenv ();
int atoi ();
void exit ();
#endif
int fstat ();
int argmatch ();
void check_type ();
void error ();
void invalid_arg ();
void perform_operation ();
void print_status ();
void usage ();
#ifdef MTTELL
void print_position ();
#endif
int do_dat_compression(char *dev, int fn, int count);
#if defined(linux) || defined(__linux)
#define MTDATCOMP 1000 /* Random unused number. */
#define MTDENS 1001 /* Random unused number. */
struct densities {
int code;
char *name;
} density_tbl[] = {
{0x00, "default"},
{0x01, "NRZI (800 bpi)"},
{0x02, "PE (1600 bpi)"},
{0x03, "GCR (6250 bpi)"},
{0x05, "QIC-45/60 (GCR, 8000 bpi)"},
{0x06, "PE (3200 bpi)"},
{0x07, "IMFM (6400 bpi)"},
{0x08, "GCR (8000 bpi)"},
{0x09, "GCR (37871 bpi)"},
{0x0a, "MFM (6667 bpi)"},
{0x0b, "PE (1600 bpi)"},
{0x0c, "GCR (12960 bpi)"},
{0x0d, "GCR (25380 bpi)"},
{0x0f, "QIC-120 (GCR 10000 bpi)"},
{0x10, "QIC-150/250 (GCR 10000 bpi)"},
{0x11, "QIC-320/525 (GCR 16000 bpi)"},
{0x12, "QIC-1350 (RLL 51667 bpi)"},
{0x13, "DDS (61000 bpi)"},
{0x14, "EXB-8200 (RLL 43245 bpi)"},
{0x15, "EXB-8500 (RLL 45434 bpi)"},
{0x16, "MFM 10000 bpi"},
{0x17, "MFM 42500 bpi"},
{0x18, "MFM 42500 bpi, 56 track pairs"},
{0x19, "DLTtape III/DLTtape IIIxt (62500 bpi)"},
{0x1A, "DLTtape IV (81633 bpi)"},
{0x22, "SLR4DC"},
{0x24, "DDS-2"},
{0x45, "QIC-3095"},
{0x80, "DLTtape III/DLTtape IIIxt (62500 bpi)"},
{0x81, "DLTtape III/DLTtape IIIxt compressed (62500 bpi)"},
{0x82, "DLTtape IV (81633 bpi)"},
{0x83, "DLTtape IV compressed (81633 bpi)"},
{140, "EXB-8505 compressed"},
{144, "EXB-8205 compressed"},
{-1, NULL}};
#endif
char *opnames[] =
{
"eof", "weof", "fsf", "bsf", "fsr", "bsr",
"rewind", "offline", "rewoffl", "eject", "status",
#ifdef MTBSFM
"bsfm",
#endif
#ifdef MTEOM
"eom",
"eod",
"seod",
#endif
#ifdef MTRETEN
"retension",
#endif
#ifdef MTERASE
"erase",
#endif
"asf",
#ifdef MTFSFM
"fsfm",
#endif
#ifdef MTSEEK
"seek",
#endif
#ifdef MTTELL
"tell",
#endif
#ifdef MTFSS
"fss",
#endif
#ifdef MTBSS
"bss",
#endif
#ifdef MTWSM
"wset",
#endif
#ifdef MTSETBLK
"setblk",
#endif
#ifdef MTSETDENSITY
"setdensity",
#endif
#ifdef MTSETDRVBUFFER
"drvbuffer",
#ifdef MT_ST_BOOLEANS
"stoptions",
#endif
#ifdef MT_ST_WRITE_THRESHOLD
"stwrthreshold",
#endif
#endif
#ifdef MTDATCOMP
"datcompression",
#endif
#ifdef MTDENS
"densities",
#endif
NULL
};
#define MTASF 600 /* Random unused number. */
short operations[] =
{
MTWEOF, MTWEOF, MTFSF, MTBSF, MTFSR, MTBSR,
MTREW, MTOFFL, MTOFFL, MTOFFL, MTNOP,
#ifdef MTBSFM
MTBSFM,
#endif
#ifdef MTEOM
MTEOM,
MTEOM,
MTEOM,
#endif
#ifdef MTRETEN
MTRETEN,
#endif
#ifdef MTERASE
MTERASE,
#endif
MTASF,
#ifdef MTFSFM
MTFSFM,
#endif
#ifdef MTSEEK
MTSEEK,
#endif
#ifdef MTTELL
MTTELL,
#endif
#ifdef MTFSS
MTFSS,
#endif
#ifdef MTBSS
MTBSS,
#endif
#ifdef MTWSM
MTWSM,
#endif
#ifdef MTSETBLK
MTSETBLK,
#endif
#ifdef MTSETDENSITY
MTSETDENSITY,
#endif
#ifdef MTSETDRVBUFFER
MTSETDRVBUFFER,
#ifdef MT_ST_BOOLEANS
MTSETDRVBUFFER,
#endif
#ifdef MT_ST_WRITE_THRESHOLD
MTSETDRVBUFFER,
#endif
#endif
#ifdef MTDATCOMP
MTDATCOMP,
#endif
#ifdef MTDENS
MTDENS,
#endif
0
};
char *cbnames[] =
{
#ifdef MT_ST_BOOLEANS
"stoptions",
#endif
#ifdef MT_ST_WRITE_THRESHOLD
"stwrthreshold",
#endif
NULL
};
int count_bits[] =
{
#ifdef MT_ST_BOOLEANS
MT_ST_BOOLEANS,
#endif
#ifdef MT_ST_WRITE_THRESHOLD
MT_ST_WRITE_THRESHOLD,
#endif
0
};
#ifdef MT_TAPE_INFO
struct mt_tape_info tapes[] = MT_TAPE_INFO;
#endif
/* If nonzero, don't consider file names that contain a `:' to be
on remote hosts; all files are local. Always zero for mt;
since when do local device names contain colons? */
int f_force_local = 0;
struct option longopts[] =
{
{"file", 1, NULL, 'f'},
{"rsh-command", 1, NULL, 1},
{"version", 0, NULL, 'V'},
{"help", 0, NULL, 'H'},
{NULL, 0, NULL, 0}
};
/* The name this program was run with. */
char *program_name;
void
main (argc, argv)
int argc;
char **argv;
{
extern char *version_string;
short operation;
int count;
char *tapedev;
int tapedesc;
int i;
char *rsh_command_option = getenv("MT_RSH");
program_name = argv[0];
tapedev = NULL;
count = 1;
/* Debian hack: Fixed a bug in the -V flag. This bug has been
reported to "bug-gnu-utils@prep.ai.mit.edu". -BEM */
while ((i = getopt_long (argc, argv, "f:t:VH", longopts, (int *) 0)) != -1)
{
switch (i)
{
case 'f':
case 't':
tapedev = optarg;
break;
case 1:
rsh_command_option = optarg;
break;
case 'V':
printf ("GNU mt %s", version_string);
exit (0);
break;
case 'H':
default:
usage (stdout, 0);
}
}
if (optind == argc)
usage (stderr, 1);
i = argmatch (argv[optind], opnames);
if (i < 0)
{
invalid_arg ("tape operation", argv[optind], i);
exit (1);
}
operation = operations[i];
i = argmatch (argv[optind], cbnames);
if (++optind < argc)
/* Debian hack: Replaced the atoi function call with strtol so
that hexidecimal values can be used for the count parameter.
This bug has been reported to "bug-gnu-utils@prep.ai.mit.edu".
(97/12/5) -BEM */
#if defined(STDC_HEADERS)
count = (int) strtol (argv[optind], NULL, 0);
#else
count = atoi (argv[optind]);
#endif
if (++optind < argc)
usage (stderr, 1);
if (i >= 0)
count |= count_bits[i];
if (tapedev == NULL)
{
tapedev = getenv ("TAPE");
if (tapedev == NULL)
#ifdef DEFTAPE /* From sys/mtio.h. */
tapedev = DEFTAPE;
#else
error (1, 0, "no tape device specified");
#endif
}
#ifdef MTDENS
if (operation == MTDENS)
{
printf("Some SCSI tape density codes:\ncode explanation\n");
for (i=0; density_tbl[i].code >= 0; i++)
printf("0x%02x %s\n", density_tbl[i].code, density_tbl[i].name);
exit (0);
}
#endif
if ( (operation == MTWEOF)
#ifdef MTERASE
|| (operation == MTERASE)
#endif
#ifdef MTWSM
|| (operation == MTWSM)
#endif
#ifdef MTSETDRVBUFFER
|| (operation == MTSETDRVBUFFER)
#endif
#ifdef MTDATCOMP
|| (operation == MTDATCOMP)
#endif
)
tapedesc = rmtopen (tapedev, O_WRONLY, 0, rsh_command_option);
else
tapedesc = rmtopen (tapedev, O_RDONLY, 0, rsh_command_option);
if (tapedesc == -1)
error (1, errno, "%s", tapedev);
check_type (tapedev, tapedesc);
#ifdef MTDATCOMP
if (operation == MTDATCOMP)
do_dat_compression(tapedev, tapedesc, count);
else
#endif
#ifdef MTTELL
if (operation == MTTELL)
print_position (tapedev, tapedesc);
else
#endif
{
if (operation == MTASF)
{
perform_operation (tapedev, tapedesc, MTREW, 1);
operation = MTFSF;
}
perform_operation (tapedev, tapedesc, operation, count);
if (operation == MTNOP)
print_status (tapedev, tapedesc);
}
if (rmtclose (tapedesc) == -1)
error (2, errno, "%s", tapedev);
exit (0);
}
void
check_type (dev, desc)
char *dev;
int desc;
{
struct stat stats;
if (_isrmt (desc))
return;
if (fstat (desc, &stats) == -1)
error (1, errno, "%s", dev);
if ((stats.st_mode & S_IFMT) != S_IFCHR)
error (1, 0, "%s is not a character special file", dev);
}
void
perform_operation (dev, desc, op, count)
char *dev;
int desc;
short op;
int count;
{
struct mtop control;
control.mt_op = op;
control.mt_count = count;
/* Debian hack: The rmtioctl function returns -1 in case of an
error, not 0. This bug has been reported to
"bug-gnu-utils@prep.ai.mit.edu". (96/7/10) -BEM */
if (rmtioctl (desc, MTIOCTOP, &control) == -1)
error (2, errno, "%s", dev);
}
#ifdef MTTELL
void
print_position (dev, desc)
char *dev;
int desc;
{
struct mtpos position;
if (rmtioctl (desc, MTIOCPOS, &position) == -1)
error (2, errno, "%s", dev);
printf("At block %d.\n", (int) position.mt_blkno);
}
#endif
void
print_status (dev, desc)
char *dev;
int desc;
{
struct mtget status;
if (rmtioctl (desc, MTIOCGET, &status))
error (2, errno, "%s", dev);
#ifdef MT_ISFTAPE_FLAG
if ((int) status.mt_type & MT_ISFTAPE_FLAG)
{
printf ("qic-117 drive type = 0x%05x, ", (int) status.mt_type & 0x1ffff);
if (GMT_DR_OPEN( (long) status.mt_gstat))
{
printf ("no tape or door open\n");
}
else
{
printf ("%s-line%s\n",
GMT_ONLINE( (long) status.mt_gstat) ? "on" : "off",
GMT_WR_PROT( (long) status.mt_gstat) ?
" and write-protected" : "");
}
}
else
#endif
{
#ifdef MT_TAPE_INFO
struct mt_tape_info *mt;
for (mt = tapes; mt->t_type; mt++)
if (mt->t_type == status.mt_type) break;
if (mt->t_type != 0)
printf ("drive type = %s\n", mt->t_name);
else
#endif
printf ("drive type = %d\n", (int) status.mt_type);
}
#if defined(hpux) || defined(__hpux)
printf ("drive status (high) = %d\n", (int) status.mt_dsreg1);
printf ("drive status (low) = %d\n", (int) status.mt_dsreg2);
#else
printf ("drive status = %d\n", (int) status.mt_dsreg);
#endif
printf ("sense key error = %d\n", (int) status.mt_erreg);
printf ("residue count = %d\n", (int) status.mt_resid);
#if !defined(ultrix) && !defined(__ultrix__) && !defined(hpux) && !defined(__hpux) && !defined(__osf__)
printf ("file number = %d\n", (int) status.mt_fileno);
printf ("block number = %d\n", (int) status.mt_blkno);
#endif
#if defined(linux) || defined(__linux)
if (status.mt_type == MT_ISSCSI1 ||
status.mt_type == MT_ISSCSI2)
{
int dens, i;
char *density;
dens = (status.mt_dsreg & MT_ST_DENSITY_MASK) >> MT_ST_DENSITY_SHIFT;
density = "unknown";
for (i=0; density_tbl[i].code >= 0; i++)
if (density_tbl[i].code == dens)
{
density = density_tbl[i].name;
break;
}
printf("Tape block size %d bytes. Density code 0x%x (%s).\n",
(int)((status.mt_dsreg & MT_ST_BLKSIZE_MASK) >>
MT_ST_BLKSIZE_SHIFT),
dens, density);
printf("Soft error count since last status=%d\n",
(int)(status.mt_erreg & MT_ST_SOFTERR_MASK) >>
MT_ST_SOFTERR_SHIFT);
printf("General status bits on (%x):\n", (unsigned)status.mt_gstat);
if (GMT_EOF(status.mt_gstat))
printf(" EOF");
if (GMT_BOT(status.mt_gstat))
printf(" BOT");
if (GMT_EOT(status.mt_gstat))
printf(" EOT");
if (GMT_SM(status.mt_gstat))
printf(" SM");
if (GMT_EOD(status.mt_gstat))
printf(" EOD");
if (GMT_WR_PROT(status.mt_gstat))
printf(" WR_PROT");
if (GMT_ONLINE(status.mt_gstat))
printf(" ONLINE");
if (GMT_D_6250(status.mt_gstat))
printf(" D_6250");
if (GMT_D_1600(status.mt_gstat))
printf(" D_1600");
if (GMT_D_800(status.mt_gstat))
printf(" D_800");
if (GMT_DR_OPEN(status.mt_gstat))
printf(" DR_OPEN");
if (GMT_IM_REP_EN(status.mt_gstat))
printf(" IM_REP_EN");
printf("\n");
}
else
{
printf("gstat = %0x\n", (unsigned)status.mt_gstat);
}
#endif
}
void
usage (fp, status)
FILE *fp;
int status;
{
fprintf (fp, "\
Usage: %s [-V] [-f device] [--file=device] [--rsh-command=command]\n\
\t[--help] [--version] operation [count]\n",
program_name);
exit (status);
}
#if defined(linux) || defined(__linux)
/*** Get and set the DAT compression (Mode Page 15) ***/
#define MODE_SENSE 0x1a
#define MODE_SELECT 0x15
int
read_mode_page(int fn, int page, int length, unsigned char *buffer,
int do_mask)
{
int result, *ip;
unsigned char tmpbuffer[30], *cmd;
memset(tmpbuffer, 0, 14);
ip = (int *)&(tmpbuffer[0]);
*ip = 0;
*(ip+1) = length + 4;
cmd = &(tmpbuffer[8]);
cmd[0] = MODE_SENSE;
cmd[1] = 8;
cmd[2] = page;
if (do_mask)
cmd[2] |= 0x40; /* Get changeable parameter mask */
cmd[4] = length + 4;
result = ioctl(fn, 1, tmpbuffer);
if (result) {
fprintf(stderr, "Can't read mode page. Are you sure you are root?\n");
return 0;
}
memcpy(buffer, tmpbuffer + 8, length + 4);
return 1;
}
int
write_mode_page(int fn, int page, int length, unsigned char *buffer)
{
int result, *ip;
unsigned char tmpbuffer[40], *cmd;
memset(tmpbuffer, 0, 14);
ip = (int *)&(tmpbuffer[0]);
*ip = length + 4;
*(ip+1) = 0;
cmd = &(tmpbuffer[8]);
cmd[0] = MODE_SELECT;
cmd[1] = 0x10;
cmd[4] = length + 4;
memcpy(tmpbuffer + 14, buffer, length + 4);
tmpbuffer[14] = 0; /* reserved data length */
tmpbuffer[18] &= 0x3f; /* reserved bits in page code byte */
result = ioctl(fn, 1, tmpbuffer);
if (result) {
fprintf(stderr, "Can't write mode page.\n");
return 0;
}
return 1;
}
int
do_dat_compression(char *dev, int fn, int count)
{
int i;
unsigned char buffer[30], mask[30];
if (!read_mode_page(fn, 0x0f, 16, buffer, 0)) {
error (2, errno, "%s", dev);
}
if (count != 1) {
if (read_mode_page(fn, 0x0f, 16, mask, 1))
if (mask[4+2] & 0x80 == 0)
fprintf(stderr, "Device does not allow setting this parameter.\n");
if (count == 0)
buffer[4+2] &= 0x7f;
else {
buffer[4+2] |= 0x80;
if (buffer[4+2+1] & 0x80 == 0) {
fprintf(stderr, "Warning: Decompression is disabled. Enabling.\n");
buffer[4+2+1] |= 0x80;
}
}
buffer[1] = 0;
if (!write_mode_page(fn, 0x0f, 16, buffer)) {
error (2, errno, "%s", dev);
}
if (!read_mode_page(fn, 0x0f, 16, buffer, 0)) { /* Re-read to check */
error (2, errno, "%s", dev);
}
}
if (buffer[4+2] & 0x80)
printf("Compression on.\n");
else
printf("Compression off.\n");
if (buffer[4+2] & 0x40)
printf("Compression capable.\n");
else
printf("Compression not capable.\n");
if (buffer[4+2+1] & 0x80)
printf("Decompression capable.\n");
else
printf("Decompression not capable.\n");
return 1;
}
#endif
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