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mt-st/mt.c
Iustin Pop 0ee3591e51 Rework the dist target and drop LSM file 
Short of moving to autotools, this is the best that can be done:

- move the version from hardcoded in the .c files, to a
  dynamically-built `version.h` file so that we only declare the
  version in one place
- build a better dist file (.tar.gz) by explicitly selecting which
  files to copy, instead of unbounded recursion from the source
  directory
- ensure that the files being copied to the archive have a sane
  user/group and mode
- add a distcheck target that simply reuses the archive to build and
  run the programs, and then regenerate the archive from itself

autotools would solve all this by default, but still feels too
heavyweight for just two .c files.

Additionall, drop the .lsm file. It seems mostly useless these days;
I'll be happy to reinstate it however if anyone cares.
2016-02-07 20:38:27 +01:00

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/* This file contains the source of the 'mt' program intended for
Linux systems. The program supports the basic mt commands found
in most Unix-like systems. In addition to this the program
supports several commands designed for use with the Linux SCSI
tape drive.
Maintained by Iustin Pop (iustin@k1024.org).
Copyright by Kai Mäkisara, 1998 - 2008. The program may be distributed
according to the GNU Public License.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include "mtio.h"
#include "version.h"
#ifndef DEFTAPE
#define DEFTAPE "/dev/tape" /* default tape device */
#endif /* DEFTAPE */
typedef int (* cmdfunc)(/* int, struct cmdef_tr *, int, char ** */);
typedef struct cmdef_tr {
char *cmd_name;
int cmd_code;
cmdfunc cmd_function;
int cmd_count_bits;
unsigned char cmd_fdtype;
unsigned char arg_cnt;
int error_tests;
} cmdef_tr;
#define NO_FD 0
#define FD_RDONLY 1
#define FD_RDWR 2
#define NO_ARGS 0
#define ONE_ARG 1
#define TWO_ARGS 2
#define MULTIPLE_ARGS 255
#define DO_BOOLEANS 1002
#define SET_BOOLEANS 1003
#define CLEAR_BOOLEANS 1004
#define ET_ONLINE 1
#define ET_WPROT 2
static void usage(int);
static int do_standard(int, cmdef_tr *, int, char **);
static int do_drvbuffer(int, cmdef_tr *, int, char **);
static int do_options(int, cmdef_tr *, int, char **);
static int do_tell(int, cmdef_tr *, int, char **);
static int do_partseek(int, cmdef_tr *, int, char **);
static int do_status(int, cmdef_tr *, int, char **);
static int print_densities(int, cmdef_tr *, int, char **);
static int do_asf(int, cmdef_tr *, int, char **);
static int do_show_options(int, cmdef_tr *, int, char **);
static void test_error(int, cmdef_tr *);
static cmdef_tr cmds[] = {
{ "weof", MTWEOF, do_standard, 0, FD_RDWR, ONE_ARG,
ET_ONLINE | ET_WPROT },
{ "wset", MTWSM, do_standard, 0, FD_RDWR, ONE_ARG,
ET_ONLINE | ET_WPROT },
{ "eof", MTWEOF, do_standard, 0, FD_RDWR, ONE_ARG,
ET_ONLINE },
{ "fsf", MTFSF, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "fsfm", MTFSFM, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "bsf", MTBSF, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "bsfm", MTBSFM, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "fsr", MTFSR, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "bsr", MTBSR, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "fss", MTFSS, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "bss", MTBSS, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "rewind", MTREW, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "offline", MTOFFL, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "rewoffl", MTOFFL, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "eject", MTOFFL, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "retension", MTRETEN, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "eod", MTEOM, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "seod", MTEOM, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "seek", MTSEEK, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "tell", MTTELL, do_tell, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "status", MTNOP, do_status, 0, FD_RDONLY, NO_ARGS,
0 },
{ "erase", MTERASE, do_standard, 0, FD_RDWR, ONE_ARG,
ET_ONLINE },
{ "setblk", MTSETBLK, do_standard, 0, FD_RDONLY, ONE_ARG,
0 },
{ "lock", MTLOCK, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "unlock", MTUNLOCK, do_standard, 0, FD_RDONLY, NO_ARGS,
ET_ONLINE },
{ "load", MTLOAD, do_standard, 0, FD_RDONLY, ONE_ARG,
0 },
{ "compression", MTCOMPRESSION, do_standard, 0, FD_RDONLY, ONE_ARG,
0 },
{ "setdensity", MTSETDENSITY, do_standard, 0, FD_RDONLY, ONE_ARG,
0 },
{ "drvbuffer", MTSETDRVBUFFER, do_drvbuffer, 0, FD_RDONLY, ONE_ARG,
0 },
{ "stwrthreshold", MTSETDRVBUFFER, do_drvbuffer, MT_ST_WRITE_THRESHOLD,
FD_RDONLY, ONE_ARG, 0},
{ "stoptions", DO_BOOLEANS, do_options, 0, FD_RDONLY,
MULTIPLE_ARGS, 0},
{ "stsetoptions", SET_BOOLEANS, do_options, 0, FD_RDONLY,
MULTIPLE_ARGS, 0},
{ "stclearoptions", CLEAR_BOOLEANS, do_options, 0, FD_RDONLY,
MULTIPLE_ARGS, 0},
{ "defblksize", MTSETDRVBUFFER, do_drvbuffer, MT_ST_DEF_BLKSIZE,
FD_RDONLY, ONE_ARG, 0},
{ "defdensity", MTSETDRVBUFFER, do_drvbuffer, MT_ST_DEF_DENSITY,
FD_RDONLY, ONE_ARG, 0},
{ "defdrvbuffer", MTSETDRVBUFFER, do_drvbuffer, MT_ST_DEF_DRVBUFFER,
FD_RDONLY, ONE_ARG, 0},
{ "defcompression", MTSETDRVBUFFER, do_drvbuffer, MT_ST_DEF_COMPRESSION,
FD_RDONLY, ONE_ARG, 0},
{ "stsetcln", MTSETDRVBUFFER, do_drvbuffer, MT_ST_SET_CLN,
FD_RDONLY, ONE_ARG, 0},
{ "sttimeout", MTSETDRVBUFFER, do_drvbuffer, MT_ST_SET_TIMEOUT,
FD_RDONLY, ONE_ARG, 0},
{ "stlongtimeout", MTSETDRVBUFFER, do_drvbuffer, MT_ST_SET_LONG_TIMEOUT,
FD_RDONLY, ONE_ARG, 0},
{ "densities", 0, print_densities, 0, NO_FD, NO_ARGS,
0 },
{ "setpartition", MTSETPART, do_standard, 0, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "mkpartition", MTMKPART, do_standard, 0, FD_RDWR, ONE_ARG,
ET_ONLINE },
{ "partseek", 0, do_partseek, 0, FD_RDONLY, TWO_ARGS,
ET_ONLINE },
{ "asf", 0, do_asf, MTREW, FD_RDONLY, ONE_ARG,
ET_ONLINE },
{ "stshowopt", 0, do_show_options, 0, FD_RDONLY, ONE_ARG,
0 },
{ "stshowoptions", 0, do_show_options, 0, FD_RDONLY, ONE_ARG,
0 },
{ NULL, 0, 0, 0, 0, 0, 0 }
};
static struct densities {
int code;
char *name;
} density_tbl[] = {
{0x00, "default"},
{0x01, "NRZI (800 bpi)"},
{0x02, "PE (1600 bpi)"},
{0x03, "GCR (6250 bpi)"},
{0x04, "QIC-11"},
{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 or QIC-1000"},
{0x16, "MFM 10000 bpi"},
{0x17, "MFM 42500 bpi"},
{0x18, "TZ86"},
{0x19, "DLT 10GB"},
{0x1a, "DLT 20GB"},
{0x1b, "DLT 35GB"},
{0x1c, "QIC-385M"},
{0x1d, "QIC-410M"},
{0x1e, "QIC-1000C"},
{0x1f, "QIC-2100C"},
{0x20, "QIC-6GB"},
{0x21, "QIC-20GB"},
{0x22, "QIC-2GB"},
{0x23, "QIC-875"},
{0x24, "DDS-2"},
{0x25, "DDS-3"},
{0x26, "DDS-4 or QIC-4GB"},
{0x27, "Exabyte Mammoth"},
{0x28, "Exabyte Mammoth-2"},
{0x29, "QIC-3080MC"},
{0x30, "AIT-1 or MLR3"},
{0x31, "AIT-2"},
{0x32, "AIT-3 or SLR7"},
{0x33, "SLR6"},
{0x34, "SLR100"},
{0x40, "DLT1 40 GB, or Ultrium"},
{0x41, "DLT 40GB, or Ultrium2"},
{0x42, "LTO-2"},
{0x44, "LTO-3"},
{0x45, "QIC-3095-MC (TR-4)"},
{0x46, "LTO-4"},
{0x47, "DDS-5 or TR-5"},
{0x48, "SDLT220"},
{0x49, "SDLT320"},
{0x4a, "SDLT600, T10000A"},
{0x4b, "T10000B"},
{0x51, "IBM 3592 J1A"},
{0x52, "IBM 3592 E05"},
{0x58, "LTO-5"},
{0x5a, "LTO-6"},
{0x5c, "LTO-7"},
{0x80, "DLT 15GB uncomp. or Ecrix"},
{0x81, "DLT 15GB compressed"},
{0x82, "DLT 20GB uncompressed"},
{0x83, "DLT 20GB compressed"},
{0x84, "DLT 35GB uncompressed"},
{0x85, "DLT 35GB compressed"},
{0x86, "DLT1 40 GB uncompressed"},
{0x87, "DLT1 40 GB compressed"},
{0x88, "DLT 40GB uncompressed"},
{0x89, "DLT 40GB compressed"},
{0x8c, "EXB-8505 compressed"},
{0x90, "SDLT110 uncompr/EXB-8205 compr"},
{0x91, "SDLT110 compressed"},
{0x92, "SDLT160 uncompressed"},
{0x93, "SDLT160 comprssed"}
};
#define NBR_DENSITIES (sizeof(density_tbl) / sizeof(struct densities))
static struct booleans {
char *name;
unsigned long bitmask;
char *expl;
} boolean_tbl[] = {
{"buffer-writes", MT_ST_BUFFER_WRITES, "buffered writes"},
{"async-writes", MT_ST_ASYNC_WRITES, "asynchronous writes"},
{"read-ahead", MT_ST_READ_AHEAD, "read-ahead for fixed block size"},
{"debug", MT_ST_DEBUGGING, "debugging (if compiled into driver)"},
{"two-fms", MT_ST_TWO_FM, "write two filemarks when file closed"},
{"fast-eod", MT_ST_FAST_MTEOM, "space directly to eod (and lose file number)"},
{"auto-lock", MT_ST_AUTO_LOCK, "automatically lock/unlock drive door"},
{"def-writes", MT_ST_DEF_WRITES, "the block size and density are for writes"},
{"can-bsr", MT_ST_CAN_BSR, "drive can space backwards well"},
{"no-blklimits", MT_ST_NO_BLKLIMS, "drive doesn't support read block limits"},
{"can-partitions",MT_ST_CAN_PARTITIONS,"drive can handle partitioned tapes"},
{"scsi2logical", MT_ST_SCSI2LOGICAL, "logical block addresses used with SCSI-2"},
{"no-wait", MT_ST_NOWAIT, "immediate mode for rewind, etc."},
#ifdef MT_ST_SYSV
{"sysv", MT_ST_SYSV, "enable the SystemV semantics"},
#endif
{"sili", MT_ST_SILI, "enable SILI for variable block mode"},
{"cleaning", MT_ST_SET_CLN, "set the cleaning bit location and mask"},
{NULL, 0, NULL}
};
static char *tape_name; /* The tape name for messages */
int
main(int argc, char **argv)
{
int mtfd, i, argn, oflags;
unsigned int len;
char *cmdstr;
cmdef_tr *comp, *comp2;
for (argn=1; argn < argc; argn++)
if (*argv[argn] == '-')
switch (*(argv[argn] + 1)) {
case 'f':
case 't':
argn += 1;
if (argn >= argc) {
usage(0);
exit(1);
}
tape_name = argv[argn];
break;
case 'h':
usage(1);
exit(0);
break;
case 'v':
printf("mt-st v. %s\n", VERSION);
exit(0);
break;
case '-':
if (*(argv[argn] + 1) == '-' &&
*(argv[argn] + 2) == 'v') {
printf("mt-st v. %s\n", VERSION);
exit(0);
}
/* Fall through */
default:
usage(0);
exit(1);
}
else
break;
if (tape_name == NULL && (tape_name = getenv("TAPE")) == NULL) {
struct stat stbuf;
tape_name = DEFTAPE;
if (!stat(tape_name, &stbuf) &&
!S_ISCHR(stbuf.st_mode)) {
fprintf(stderr, "The default '%s' is not a character device.\n\n", tape_name);
usage(1);
exit(1);
}
}
if (argn >= argc ) {
usage(0);
exit(1);
}
cmdstr = argv[argn++];
len = strlen(cmdstr);
for (comp = cmds; comp->cmd_name != NULL; comp++)
if (strncmp(cmdstr, comp->cmd_name, len) == 0)
break;
if (comp->cmd_name == NULL) {
fprintf(stderr, "mt: unknown command \"%s\"\n", cmdstr);
usage(1);
exit(1);
}
if (len != strlen(comp->cmd_name)) {
for (comp2 = comp + 1; comp2->cmd_name != NULL; comp2++)
if (strncmp(cmdstr, comp2->cmd_name, len) == 0)
break;
if (comp2->cmd_name != NULL) {
fprintf(stderr, "mt: ambiguous command \"%s\"\n", cmdstr);
usage(1);
exit(1);
}
}
if (comp->arg_cnt != MULTIPLE_ARGS && comp->arg_cnt < argc - argn) {
fprintf(stderr, "mt: too many arguments for the command '%s'.\n",
comp->cmd_name);
exit(1);
}
if (comp->cmd_fdtype != NO_FD) {
oflags = comp->cmd_fdtype == FD_RDONLY ? O_RDONLY : O_RDWR;
if ((comp->error_tests & ET_ONLINE) == 0)
oflags |= O_NONBLOCK;
if ((mtfd = open(tape_name, oflags)) < 0) {
perror(tape_name);
exit(1);
}
}
else
mtfd = (-1);
if (comp->cmd_function != NULL) {
i = comp->cmd_function(mtfd, comp, argc - argn,
(argc - argn > 0 ? argv + argn : NULL));
if (i) {
if (errno == ENOSYS)
fprintf(stderr, "mt: Command not supported by this kernel.\n");
else if (comp->error_tests != 0)
test_error(mtfd, comp);
}
}
else {
fprintf(stderr, "mt: Internal error: command without function.\n");
i = 1;
}
if (mtfd >= 0)
close(mtfd);
return i;
}
static void
usage(int explain)
{
int ind;
char line[100];
fprintf(stderr, "usage: mt [-v] [--version] [-h] [ -f device ] command [ count ]\n");
if (explain) {
for (ind=0; cmds[ind].cmd_name != NULL; ) {
if (ind == 0)
strcpy(line, "commands: ");
else
strcpy(line, " ");
for ( ; cmds[ind].cmd_name != NULL; ind++) {
strcat(line, cmds[ind].cmd_name);
if (cmds[ind+1].cmd_name != NULL)
strcat(line, ", ");
else
strcat(line, ".");
if (strlen(line) >= 70 || cmds[ind+1].cmd_name == NULL) {
fprintf(stderr, "%s\n", line);
ind++;
break;
}
}
}
}
}
/* Do a command that simply feeds an argument to the MTIOCTOP ioctl */
static int
do_standard(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
struct mtop mt_com;
char *endp;
mt_com.mt_op = cmd->cmd_code;
mt_com.mt_count = (argc > 0 ? strtol(*argv, &endp, 0) : 1);
if (argc > 0 && endp != *argv) {
if (*endp == 'k')
mt_com.mt_count *= 1024;
else if (*endp == 'M')
mt_com.mt_count *= 1024 * 1024;
else if (*endp == 'G')
mt_com.mt_count *= 1024 * 1024 * 1024;
}
mt_com.mt_count |= cmd->cmd_count_bits;
if (mt_com.mt_count < 0) {
fprintf(stderr, "mt: negative repeat count\n");
return 1;
}
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
return 0;
}
/* The the drive buffering and other things with this (highly overloaded)
ioctl function. (See also do_options below.) */
static int
do_drvbuffer(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
struct mtop mt_com;
mt_com.mt_op = MTSETDRVBUFFER;
mt_com.mt_count = (argc > 0 ? strtol(*argv, NULL, 0) : 1);
if ((cmd->cmd_count_bits & MT_ST_OPTIONS) == MT_ST_DEF_OPTIONS)
mt_com.mt_count &= 0xfffff;
#ifdef MT_ST_TIMEOUTS
else if ((cmd->cmd_count_bits & MT_ST_OPTIONS) == MT_ST_TIMEOUTS)
mt_com.mt_count &= 0x7ffffff;
#endif
else
mt_com.mt_count &= 0xfffffff;
mt_com.mt_count |= cmd->cmd_count_bits;
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
return 0;
}
/* Set the tape driver options */
static int
do_options(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
int i, an;
unsigned int len;
struct mtop mt_com;
mt_com.mt_op = MTSETDRVBUFFER;
if (argc == 0)
mt_com.mt_count = 0;
else if (isdigit(**argv))
mt_com.mt_count = strtol(*argv, NULL, 0) & ~MT_ST_OPTIONS;
else
for (an = 0, mt_com.mt_count = 0; an < argc; an++) {
len = strlen(argv[an]);
for (i=0; boolean_tbl[i].name != NULL; i++)
if (!strncmp(boolean_tbl[i].name, argv[an], len)) {
mt_com.mt_count |= boolean_tbl[i].bitmask;
break;
}
if (boolean_tbl[i].name == NULL) {
fprintf(stderr, "Illegal property name '%s'.\n", argv[an]);
fprintf(stderr, "The implemented property names are:\n");
for (i=0; boolean_tbl[i].name != NULL; i++)
fprintf(stderr, " %9s -> %s\n", boolean_tbl[i].name,
boolean_tbl[i].expl);
return 1;
}
if (len != strlen(boolean_tbl[i].name))
for (i++ ; boolean_tbl[i].name != NULL; i++)
if (!strncmp(boolean_tbl[i].name, argv[an], len)) {
fprintf(stderr, "Property name '%s' ambiguous.\n",
argv[an]);
return 1;
}
}
switch (cmd->cmd_code) {
case DO_BOOLEANS:
mt_com.mt_count |= MT_ST_BOOLEANS;
break;
case SET_BOOLEANS:
mt_com.mt_count |= MT_ST_SETBOOLEANS;
break;
case CLEAR_BOOLEANS:
mt_com.mt_count |= MT_ST_CLEARBOOLEANS;
break;
}
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
return 0;
}
/* Tell where the tape is */
static int
do_tell(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
struct mtpos mt_pos;
if (ioctl(mtfd, MTIOCPOS, (char *)&mt_pos) < 0) {
perror(tape_name);
return 2;
}
printf("At block %ld.\n", mt_pos.mt_blkno);
return 0;
}
/* Position the tape to a specific location within a specified partition */
static int
do_partseek(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
struct mtop mt_com;
mt_com.mt_op = MTSETPART;
mt_com.mt_count = (argc > 0 ? strtol(*argv, NULL, 0) : 0);
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
mt_com.mt_op = MTSEEK;
mt_com.mt_count = (argc > 1 ? strtol(argv[1], NULL, 0) : 0);
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
return 0;
}
/* Position to start of file n. This might be implemented more intelligently
some day. */
static int
do_asf(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
struct mtop mt_com;
mt_com.mt_op = MTREW;
mt_com.mt_count = 1;
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
mt_com.mt_count = (argc > 0 ? strtol(*argv, NULL, 0) : 0);
if (mt_com.mt_count > 0) {
mt_com.mt_op = MTFSF;
if (ioctl(mtfd, MTIOCTOP, (char *)&mt_com) < 0) {
perror(tape_name);
return 2;
}
}
return 0;
}
/*** Decipher the status ***/
static int
do_status(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
struct mtget status;
int dens;
unsigned int i;
char *type, *density;
if (ioctl(mtfd, MTIOCGET, (char *)&status) < 0) {
perror(tape_name);
return 2;
}
if (status.mt_type == MT_ISSCSI1)
type = "SCSI 1";
else if (status.mt_type == MT_ISSCSI2)
type = "SCSI 2";
else if (status.mt_type == MT_ISONSTREAM_SC)
type = "OnStream SC-, DI-, DP-, or USB";
else
type = NULL;
if (type == NULL) {
if (status.mt_type & 0x800000)
printf ("qic-117 drive type = 0x%05lx\n", status.mt_type & 0x1ffff);
else if (status.mt_type == 0)
printf("IDE-Tape (type code 0) ?\n");
else
printf("Unknown tape drive type (type code %ld)\n", status.mt_type);
printf("File number=%d, block number=%d.\n",
status.mt_fileno, status.mt_blkno);
printf("mt_resid: %ld, mt_erreg: 0x%lx\n",
status.mt_resid, status.mt_erreg);
printf("mt_dsreg: 0x%lx, mt_gstat: 0x%lx\n",
status.mt_dsreg, status.mt_gstat);
}
else {
printf("%s tape drive:\n", type);
if (status.mt_type == MT_ISSCSI2)
printf("File number=%d, block number=%d, partition=%ld.\n",
status.mt_fileno, status.mt_blkno, (status.mt_resid & 0xff));
else
printf("File number=%d, block number=%d.\n",
status.mt_fileno, status.mt_blkno);
if (status.mt_type == MT_ISSCSI1 ||
status.mt_type == MT_ISSCSI2 ||
status.mt_type == MT_ISONSTREAM_SC) {
dens = (status.mt_dsreg & MT_ST_DENSITY_MASK) >> MT_ST_DENSITY_SHIFT;
density = "no translation";
for (i=0; i < NBR_DENSITIES; i++)
if (density_tbl[i].code == dens) {
density = density_tbl[i].name;
break;
}
printf("Tape block size %ld bytes. Density code 0x%x (%s).\n",
((status.mt_dsreg & MT_ST_BLKSIZE_MASK) >> MT_ST_BLKSIZE_SHIFT),
dens, density);
printf("Soft error count since last status=%ld\n",
(status.mt_erreg & MT_ST_SOFTERR_MASK) >> MT_ST_SOFTERR_SHIFT);
}
}
printf("General status bits on (%lx):\n", 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");
if (GMT_CLN(status.mt_gstat))
printf(" CLN");
printf("\n");
return 0;
}
/* From linux/drivers/scsi/st.[ch] */
#define ST_NBR_MODE_BITS 2
#define ST_NBR_MODES (1 << ST_NBR_MODE_BITS)
#define ST_MODE_SHIFT (7 - ST_NBR_MODE_BITS)
#define ST_MODE_MASK ((ST_NBR_MODES - 1) << ST_MODE_SHIFT)
#define TAPE_NR(minor) ( (((minor) & ~255) >> (ST_NBR_MODE_BITS + 1)) | \
((minor) & ~(-1 << ST_MODE_SHIFT)) )
#define TAPE_MODE(minor) (((minor) & ST_MODE_MASK) >> ST_MODE_SHIFT)
static const char *st_formats[] = {
"", "r", "k", "s", "l", "t", "o", "u",
"m", "v", "p", "x", "a", "y", "q", "z"};
/* Show the options if visible in sysfs */
static int do_show_options(int mtfd, cmdef_tr *cmd, int argc, char **argv)
{
int i, fd, options, tapeminor, tapeno, tapemode;
struct stat stat;
struct utsname uts;
char fname[100], buf[20];
if (uname(&uts) < 0) {
perror(tape_name);
return 2;
}
sscanf(uts.release, "%d.%d.%d", &i, &tapeno, &tapemode);
if (i < 2 || tapeno < 6 || tapemode < 26)
printf("Your kernel (%d.%d.%d) may be too old for this command.\n",
i, tapeno, tapemode);
if (fstat(mtfd, &stat) < 0) {
perror(tape_name);
return 1;
}
if (!(stat.st_mode & S_IFCHR)) {
fprintf(stderr, "mt: not a character device.\n");
return 1;
}
tapeminor = minor(stat.st_rdev);
tapeno = TAPE_NR(tapeminor);
tapemode = TAPE_MODE(tapeminor);
tapemode <<= 4 - ST_NBR_MODE_BITS; /* from st.c */
sprintf(fname, "/sys/class/scsi_tape/st%d%s/options", tapeno,
st_formats[tapemode]);
/* printf("Trying file '%s' (st_rdev 0x%lx).\n", fname, stat.st_rdev); */
if ((fd = open(fname, O_RDONLY)) < 0 ||
read(fd, buf, 20) < 0) {
fprintf(stderr, "Can't read the sysfs file '%s'.\n", fname);
return 2;
}
close(fd);
options = strtol(buf, NULL, 0);
printf("The options set:");
for (i=0; boolean_tbl[i].name != NULL; i++)
if (options & boolean_tbl[i].bitmask)
printf(" %s", boolean_tbl[i].name);
printf("\n");
return 0;
}
/* Print a list of possible density codes */
static int
print_densities(int fd, cmdef_tr *cmd, int argc, char **argv)
{
unsigned int i, offset;
printf("Some SCSI tape density codes:\ncode explanation code explanation\n");
offset = (NBR_DENSITIES + 1) / 2;
for (i=0; i < offset; i++) {
printf("0x%02x %-28s", density_tbl[i].code, density_tbl[i].name);
if (i + offset < NBR_DENSITIES)
printf(" 0x%02x %s\n", density_tbl[i + offset].code, density_tbl[i + offset].name);
else
printf("\n");
}
return 0;
}
/* Try to find out why the command failed */
static void
test_error(int mtfd, cmdef_tr *cmd)
{
struct mtget status;
if (ioctl(mtfd, MTIOCGET, (char *)&status) < 0)
return;
if (status.mt_type != MT_ISSCSI1 && status.mt_type != MT_ISSCSI2)
return;
if ((cmd->error_tests & ET_ONLINE) && !GMT_ONLINE(status.mt_gstat))
fprintf(stderr, "mt: The device is offline (not powered on, no tape ?).\n");
if ((cmd->error_tests & ET_WPROT) && !GMT_WR_PROT(status.mt_gstat))
fprintf(stderr, "mt: The tape is write-protected.\n");
}
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