325 lines
8.6 KiB
C
325 lines
8.6 KiB
C
/* $NetBSD: mt.c,v 1.47 2011/08/29 14:46:01 joerg Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: mt.c,v 1.47 2011/08/29 14:46:01 joerg Exp $");
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#endif
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#endif /* not lint */
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/*
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* mt --
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* magnetic tape manipulation program
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/mtio.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <rmt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* pseudo ioctl constants */
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#define MTASF 100
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struct commands {
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const char *c_name; /* command */
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size_t c_namelen; /* command len */
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u_long c_spcl; /* ioctl request */
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int c_code; /* ioctl code for MTIOCTOP command */
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int c_ronly; /* open tape read-only */
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int c_mincount; /* min allowed count value */
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};
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#define CMD(a) a, sizeof(a) - 1
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static const struct commands com[] = {
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{ CMD("asf"), MTIOCTOP, MTASF, 1, 0 },
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{ CMD("blocksize"), MTIOCTOP, MTSETBSIZ, 1, 0 },
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{ CMD("bsf"), MTIOCTOP, MTBSF, 1, 1 },
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{ CMD("bsr"), MTIOCTOP, MTBSR, 1, 1 },
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{ CMD("compress"), MTIOCTOP, MTCMPRESS, 1, 0 },
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{ CMD("density"), MTIOCTOP, MTSETDNSTY, 1, 0 },
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{ CMD("eof"), MTIOCTOP, MTWEOF, 0, 1 },
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{ CMD("eom"), MTIOCTOP, MTEOM, 1, 0 },
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{ CMD("erase"), MTIOCTOP, MTERASE, 0, 0 },
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{ CMD("fsf"), MTIOCTOP, MTFSF, 1, 1 },
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{ CMD("fsr"), MTIOCTOP, MTFSR, 1, 1 },
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{ CMD("offline"), MTIOCTOP, MTOFFL, 1, 0 },
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{ CMD("rdhpos"), MTIOCRDHPOS, 0, 1, 0 },
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{ CMD("rdspos"), MTIOCRDSPOS, 0, 1, 0 },
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{ CMD("retension"), MTIOCTOP, MTRETEN, 1, 0 },
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{ CMD("rewind"), MTIOCTOP, MTREW, 1, 0 },
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{ CMD("rewoffl"), MTIOCTOP, MTOFFL, 1, 0 },
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{ CMD("setblk"), MTIOCTOP, MTSETBSIZ, 1, 0 },
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{ CMD("setdensity"), MTIOCTOP, MTSETDNSTY, 1, 0 },
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{ CMD("sethpos"), MTIOCHLOCATE, 0, 1, 0 },
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{ CMD("setspos"), MTIOCSLOCATE, 0, 1, 0 },
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{ CMD("status"), MTIOCGET, MTNOP, 1, 0 },
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{ CMD("weof"), MTIOCTOP, MTWEOF, 0, 1 },
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{ CMD("eew"), MTIOCTOP, MTEWARN, 1, 0 },
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{ .c_name = NULL }
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};
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static void printreg(const char *, u_int, const char *);
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static void status(struct mtget *);
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__dead static void usage(void);
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int
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main(int argc, char *argv[])
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{
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const struct commands *cp, *comp;
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struct mtget mt_status;
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struct mtop mt_com;
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int ch, mtfd, flags;
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char *p;
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const char *tape;
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int count;
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size_t len;
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setprogname(argv[0]);
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if ((tape = getenv("TAPE")) == NULL)
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tape = _PATH_DEFTAPE;
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while ((ch = getopt(argc, argv, "f:t:")) != -1)
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switch (ch) {
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case 'f':
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case 't':
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tape = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1 || argc > 2)
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usage();
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len = strlen(p = *argv++);
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for (comp = NULL, cp = com; cp->c_name != NULL; cp++) {
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size_t clen = MIN(len, cp->c_namelen);
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if (strncmp(p, cp->c_name, clen) == 0) {
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if (comp != NULL)
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errx(1, "%s: Ambiguous command `%s' or `%s'?",
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p, cp->c_name, comp->c_name);
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else
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comp = cp;
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}
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}
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if (comp == NULL)
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errx(1, "%s: unknown command", p);
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if (*argv) {
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count = strtol(*argv, &p, 10);
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if (count < comp->c_mincount || *p)
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errx(2, "%s: illegal count", *argv);
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} else
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count = 1;
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flags = comp->c_ronly ? O_RDONLY : O_WRONLY;
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if ((mtfd = open(tape, flags)) < 0)
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err(2, "%s", tape);
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switch (comp->c_spcl) {
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case MTIOCTOP:
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if (comp->c_code == MTASF) {
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/* If mtget.mt_fileno was implemented, We could
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compute the minimal seek needed to position
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the tape. Until then, rewind and seek from
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begining-of-tape */
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mt_com.mt_op = MTREW;
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mt_com.mt_count = 1;
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if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
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err(2, "%s", tape);
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if (count > 0) {
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mt_com.mt_op = MTFSF;
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mt_com.mt_count = count;
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if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
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err(2, "%s", tape);
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}
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} else {
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mt_com.mt_op = comp->c_code;
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mt_com.mt_count = count;
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if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
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err(2, "%s: %s", tape, comp->c_name);
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}
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break;
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case MTIOCGET:
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if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
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err(2, "%s: %s", tape, comp->c_name);
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status(&mt_status);
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break;
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case MTIOCRDSPOS:
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case MTIOCRDHPOS:
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if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0)
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err(2, "%s", tape);
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printf("%s: block location %u\n", tape, (unsigned int) count);
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break;
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case MTIOCSLOCATE:
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case MTIOCHLOCATE:
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if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0)
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err(2, "%s", tape);
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break;
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default:
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errx(1, "internal error: unknown request %ld", comp->c_spcl);
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}
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exit(0);
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/* NOTREACHED */
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}
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#if defined(sun) && !defined(__SVR4)
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#include <sundev/tmreg.h>
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#include <sundev/arreg.h>
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#endif
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#ifdef tahoe
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#include <tahoe/vba/cyreg.h>
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#endif
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static const struct tape_desc {
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short t_type; /* type of magtape device */
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const char *t_name; /* printing name */
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const char *t_dsbits; /* "drive status" register */
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const char *t_erbits; /* "error" register */
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} tapes[] = {
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#if defined(sun) && !defined(__SVR4)
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{ MT_ISCPC, "TapeMaster", TMS_BITS, 0 },
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{ MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS },
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#endif
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#ifdef tahoe
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{ MT_ISCY, "cipher", CYS_BITS, CYCW_BITS },
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#endif
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#define SCSI_DS_BITS "\20\5WriteProtect\2Mounted"
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{ 0x7, "SCSI", SCSI_DS_BITS, "76543210" },
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{ .t_type = 0 }
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};
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/*
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* Interpret the status buffer returned
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*/
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static void
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status(struct mtget *bp)
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{
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const struct tape_desc *mt;
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for (mt = tapes;; mt++) {
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if (mt->t_type == 0) {
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(void)printf("%d: unknown tape drive type\n",
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bp->mt_type);
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return;
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}
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if (mt->t_type == bp->mt_type)
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break;
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}
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(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
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printreg("ds", bp->mt_dsreg, mt->t_dsbits);
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printreg("\ner", bp->mt_erreg, mt->t_erbits);
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(void)putchar('\n');
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(void)printf("blocksize: %d (%d, %d, %d, %d)\n",
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bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1],
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bp->mt_mblksiz[2], bp->mt_mblksiz[3]);
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(void)printf("density: %d (%d, %d, %d, %d)\n",
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bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1],
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bp->mt_mdensity[2], bp->mt_mdensity[3]);
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(void)printf("current file number: %d\n", bp->mt_fileno);
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(void)printf("current block number: %d\n", bp->mt_blkno);
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}
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/*
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* Print a register a la the %b format of the kernel's printf.
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*/
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static void
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printreg(const char *s, u_int v, const char *bits)
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{
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int any, i;
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char c;
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any = 0;
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if (bits && *bits == 8)
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printf("%s=%o", s, v);
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else
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printf("%s=%x", s, v);
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if (v && bits && *++bits) {
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putchar('<');
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while ((i = *bits++)) {
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if (v & (1 << (i-1))) {
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if (any)
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putchar(',');
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any = 1;
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for (; (c = *bits) > 32; bits++)
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putchar(c);
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} else
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for (; *bits > 32; bits++)
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;
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}
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putchar('>');
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}
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: %s [-f device] command [count]\n",
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getprogname());
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exit(1);
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/* NOTREACHED */
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}
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