331 lines
7.4 KiB
C
331 lines
7.4 KiB
C
/* $OpenBSD: mt.c,v 1.41 2019/06/28 13:34:59 deraadt Exp $ */
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/* $NetBSD: mt.c,v 1.14.2.1 1996/05/27 15:12:11 mrg 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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/*
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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 <sys/disklabel.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.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 <util.h>
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#include <limits.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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int c_mincount;
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} com[] = {
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{ "blocksize", MTSETBSIZ, 1, 0 },
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{ "bsf", MTBSF, 1, 1 },
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{ "bsr", MTBSR, 1, 1 },
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{ "density", MTSETDNSTY, 1, 1 },
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{ "eof", MTWEOF, 0, 1 },
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{ "eom", MTEOM, 1, 1 },
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{ "erase", MTERASE, 0, 1 },
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{ "fsf", MTFSF, 1, 1 },
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{ "fsr", MTFSR, 1, 1 },
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{ "offline", MTOFFL, 1, 1 },
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#define COM_EJECT 9 /* element in the above array */
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{ "rewind", MTREW, 1, 1 },
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{ "rewoffl", MTOFFL, 1, 1 },
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{ "status", MTNOP, 1, 1 },
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{ "retension", MTRETEN, 1, 1 },
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#define COM_RETEN 13 /* element in the above array */
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{ "weof", MTWEOF, 0, 1 },
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{ NULL }
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};
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void printreg(char *, u_int, char *);
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void status(struct mtget *);
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void usage(void);
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int _rmtopendev(char *path, int oflags, int dflags, char **realp);
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int _rmtmtioctop(int fd, struct mtop *cmd);
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struct mtget *_rmtstatus(int fd);
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void _rmtclose(void);
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extern char *__progname;
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char *host = NULL; /* remote host (if any) */
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int
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_rmtopendev(char *path, int oflags, int dflags, char **realp)
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{
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#ifdef RMT
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if (host)
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return rmtopen(path, oflags);
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#endif
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return opendev(path, oflags, dflags, realp);
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}
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int
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_rmtmtioctop(int fd, struct mtop *cmd)
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{
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#ifdef RMT
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if (host)
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return rmtioctl(cmd->mt_op, cmd->mt_count);
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#endif
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return ioctl(fd, MTIOCTOP, cmd);
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}
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struct mtget *
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_rmtstatus(int fd)
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{
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static struct mtget mt_status;
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#ifdef RMT
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if (host)
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return rmtstatus();
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#endif
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if (ioctl(fd, MTIOCGET, &mt_status) == -1)
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err(2, "ioctl MTIOCGET");
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return &mt_status;
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}
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void
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_rmtclose(void)
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{
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#ifdef RMT
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if (host)
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rmtclose();
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#endif
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}
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int eject = 0;
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int
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main(int argc, char *argv[])
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{
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struct commands *comp;
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struct mtop mt_com;
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int ch, mtfd, flags, insert = 0;
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char *p, *tape, *realtape, *opts;
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size_t len;
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if (strcmp(__progname, "eject") == 0) {
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opts = "t";
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eject = 1;
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tape = NULL;
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} else {
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opts = "f:";
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if ((tape = getenv("TAPE")) == NULL)
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tape = _PATH_DEFTAPE;
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}
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while ((ch = getopt(argc, argv, opts)) != -1) {
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switch (ch) {
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case 't':
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insert = 1;
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break;
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case 'f':
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tape = optarg;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (eject) {
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if (argc == 1) {
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tape = *argv++;
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argc--;
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}
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if (argc != 0)
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usage();
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} else if (argc < 1 || argc > 2)
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usage();
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if (tape == NULL)
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usage();
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if (strchr(tape, ':')) {
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#ifdef RMT
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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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#else
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err(1, "no remote support");
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#endif
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}
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if (strlen(tape) >= PATH_MAX)
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err(1, "tape name too long for protocol");
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if (eject) {
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if (insert)
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comp = &com[COM_RETEN];
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else
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comp = &com[COM_EJECT];
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} else {
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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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}
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flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT;
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/* NOTE: OPENDEV_PART required since cd(4) devices go through here. */
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if ((mtfd = _rmtopendev(tape, flags, OPENDEV_PART, &realtape)) == -1) {
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if (errno != 0)
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warn("%s", host ? tape : realtape);
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exit(2);
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}
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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 < comp->c_mincount || *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 (_rmtmtioctop(mtfd, &mt_com) == -1) {
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if (eject)
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err(2, "%s", tape);
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else
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err(2, "%s: %s", tape, comp->c_name);
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}
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} else {
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status(_rmtstatus(mtfd));
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}
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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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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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#define SCSI_DS_BITS "\20\5WriteProtect\2Mounted"
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{ 0x7, "SCSI", SCSI_DS_BITS, "76543210" },
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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(struct mtget *bp)
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{
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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)\n", bp->mt_blksiz, bp->mt_mblksiz);
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(void)printf("density: %d (%d)\n", bp->mt_density, bp->mt_mdensity);
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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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void
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printreg(char *s, u_int v, char *bits)
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{
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int i, any = 0;
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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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if (!bits)
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return;
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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(void)
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{
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if (eject)
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(void)fprintf(stderr, "usage: %s [-t] device\n", __progname);
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else
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(void)fprintf(stderr,
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"usage: %s [-f device] command [count]\n", __progname);
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exit(X_USAGE);
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}
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