271 lines
6.4 KiB
C
271 lines
6.4 KiB
C
/* $NetBSD: mt.c,v 1.12 1996/03/28 07:10:05 scottr 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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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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static char rcsid[] = "$NetBSD: mt.c,v 1.12 1996/03/28 07:10:05 scottr 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/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 <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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#include "mt.h"
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struct commands {
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char *c_name;
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int c_code;
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int c_ronly;
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} com[] = {
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{ "bsf", MTBSF, 1 },
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{ "bsr", MTBSR, 1 },
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{ "eof", MTWEOF, 0 },
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{ "eom", MTEOM, 1 },
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{ "erase", MTERASE, 0 },
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{ "fsf", MTFSF, 1 },
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{ "fsr", MTFSR, 1 },
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{ "offline", MTOFFL, 1 },
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{ "rewind", MTREW, 1 },
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{ "rewoffl", MTOFFL, 1 },
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{ "status", MTNOP, 1 },
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{ "retension", MTRETEN, 1 },
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{ "weof", MTWEOF, 0 },
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{ NULL }
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};
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void printreg __P((char *, u_int, char *));
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void status __P((struct mtget *));
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void usage __P((void));
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char *host = NULL; /* remote host (if any) */
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uid_t uid; /* read uid */
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uid_t euid; /* effective uid */
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register struct commands *comp;
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struct mtget mt_status;
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struct mtop mt_com;
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int ch, len, mtfd, flags;
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char *p, *tape;
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uid = getuid();
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euid = geteuid();
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(void) seteuid(uid);
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if ((tape = getenv("TAPE")) == NULL)
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tape = 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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if (strchr(tape, ':')) {
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host = tape;
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tape = strchr(host, ':');
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*tape++ = '\0';
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if (rmthost(host) == 0)
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exit(X_ABORT);
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}
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(void) setuid(uid); /* rmthost() is the only reason to be setuid */
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len = strlen(p = *argv++);
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for (comp = com;; comp++) {
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if (comp->c_name == NULL)
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errx(1, "%s: unknown command", p);
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if (strncmp(p, comp->c_name, len) == 0)
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break;
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}
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flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT;
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if ((mtfd = host ? rmtopen(tape, flags) : open(tape, flags,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) < 0)
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err(2, "%s", tape);
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if (comp->c_code != MTNOP) {
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mt_com.mt_op = comp->c_code;
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if (*argv) {
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mt_com.mt_count = strtol(*argv, &p, 10);
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if (mt_com.mt_count <= 0 || *p)
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errx(2, "%s: illegal count", *argv);
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}
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else
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mt_com.mt_count = 1;
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if ((host ? rmtioctl(mt_com.mt_op, mt_com.mt_count) :
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ioctl(mtfd, MTIOCTOP, &mt_com)) < 0)
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err(2, "%s: %s", tape, comp->c_name);
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} else {
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if (host)
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status(rmtstatus());
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else {
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if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
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err(2, "ioctl MTIOCGET");
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status(&mt_status);
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}
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}
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if (host)
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rmtclose();
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exit(X_FINOK);
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/* NOTREACHED */
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}
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#ifdef sun
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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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struct tape_desc {
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short t_type; /* type of magtape device */
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char *t_name; /* printing name */
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char *t_dsbits; /* "drive status" register */
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char *t_erbits; /* "error" register */
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} tapes[] = {
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#ifdef sun
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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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{ 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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void
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status(bp)
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register struct mtget *bp;
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{
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register 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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}
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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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void
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printreg(s, v, bits)
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char *s;
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register u_int v;
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register char *bits;
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{
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register int i, any = 0;
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register char c;
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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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bits++;
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if (v && 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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void
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usage()
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{
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(void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
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exit(X_USAGE);
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}
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