aboutsummaryrefslogtreecommitdiff
path: root/src/mt.c
blob: 9cfcb61c386470123ce5b2e2c110d80ee0cc68df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/* mt -- control magnetic tape drive operation
   Copyright (C) 1991, 1992, 1995, 2001 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
   */


/* 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.

   David MacKenzie <djm@gnu.ai.mit.edu> */

#if defined(HAVE_CONFIG_H)
# include <config.h>
#endif

#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>

#ifdef HAVE_LOCALE_H
#  include <locale.h>
#endif
#include "localedir.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(HAVE_STDLIB_H)
# include <stdlib.h>
#endif

#if !HAVE_DECL_ERRNO
extern int errno;
#endif
#if !HAVE_DECL_GETENV
char *getenv ();
#endif
#if !HAVE_DECL_ATOI
int atoi ();
#endif
#if !HAVE_DECL_EXIT
void exit ();
#endif

int fstat ();

int argmatch ();
void check_type ();
void error ();
void invalid_arg ();
void perform_operation ();
void print_status ();
void usage ();

char *opnames[] =
{
  "eof", "weof", "fsf", "bsf", "fsr", "bsr",
  "rewind", "offline", "rewoffl", "eject", "status",
#ifdef MTBSFM
  "bsfm",
#endif
#ifdef MTEOM
  "eom",
#endif
#ifdef MTRETEN
  "retension",
#endif
#ifdef MTERASE
  "erase",
#endif
  "asf",
#ifdef MTFSFM
  "fsfm",
#endif
#ifdef MTSEEK
  "seek",
#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,
#endif
#ifdef MTRETEN
  MTRETEN,
#endif
#ifdef MTERASE
  MTERASE,
#endif
  MTASF,
#ifdef MTFSFM
  MTFSFM,
#endif
#ifdef MTSEEK
  MTSEEK,
#endif
  0
};

/* 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;

int
main (argc, argv)
     int argc;
     char **argv;
{
  short operation;
  int count;
  char *tapedev;
  int tapedesc;
  int i;
  char *rsh_command_option = NULL;

#ifdef HAVE_LOCALE_H
  setlocale (LC_ALL, "");
#endif
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);
  
  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 ("mt (%s)\n", PACKAGE_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];

  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 (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
    }

  if ( (operation == MTWEOF)
#ifdef MTERASE
       || (operation == MTERASE)
#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);

  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);
}

void
print_status (dev, desc)
     char *dev;
     int desc;
{
  struct mtget status;

  if (rmtioctl (desc, MTIOCGET, &status) == -1)
    error (2, errno, "%s", dev);

  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
}

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);
}

Return to:

Send suggestions and report system problems to the System administrator.