/* $OpenBSD: mt.c,v 1.3 1996/04/17 17:01:46 dm Exp $ */ /* $NetBSD: mt.c,v 1.12 1996/03/28 07:10:05 scottr Exp $ */ /* * Copyright (c) 1980, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1980, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93"; #else static char rcsid[] = "$NetBSD: mt.c,v 1.12 1996/03/28 07:10:05 scottr Exp $"; #endif #endif /* not lint */ /* * mt -- * magnetic tape manipulation program */ #include #include #include #include #include #include #include #include #include #include #include #include "mt.h" struct commands { char *c_name; int c_code; int c_ronly; } com[] = { { "bsf", MTBSF, 1 }, { "bsr", MTBSR, 1 }, { "eof", MTWEOF, 0 }, { "eom", MTEOM, 1 }, { "erase", MTERASE, 0 }, { "fsf", MTFSF, 1 }, { "fsr", MTFSR, 1 }, { "offline", MTOFFL, 1 }, { "rewind", MTREW, 1 }, { "rewoffl", MTOFFL, 1 }, { "status", MTNOP, 1 }, { "retension", MTRETEN, 1 }, { "weof", MTWEOF, 0 }, { NULL } }; void printreg __P((char *, u_int, char *)); void status __P((struct mtget *)); void usage __P((void)); char *host = NULL; /* remote host (if any) */ uid_t uid; /* read uid */ uid_t euid; /* effective uid */ int main(argc, argv) int argc; char *argv[]; { register struct commands *comp; struct mtget mt_status; struct mtop mt_com; int ch, len, mtfd, flags; char *p, *tape; uid = getuid(); euid = geteuid(); (void) seteuid(uid); if ((tape = getenv("TAPE")) == NULL) tape = DEFTAPE; while ((ch = getopt(argc, argv, "f:t:")) != -1) switch (ch) { case 'f': case 't': tape = optarg; break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc < 1 || argc > 2) usage(); if (strchr(tape, ':')) { host = tape; tape = strchr(host, ':'); *tape++ = '\0'; if (rmthost(host) == 0) exit(X_ABORT); } (void) setuid(uid); /* rmthost() is the only reason to be setuid */ len = strlen(p = *argv++); for (comp = com;; comp++) { if (comp->c_name == NULL) errx(1, "%s: unknown command", p); if (strncmp(p, comp->c_name, len) == 0) break; } flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT; if ((mtfd = host ? rmtopen(tape, flags) : open(tape, flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) < 0) err(2, "%s", tape); if (comp->c_code != MTNOP) { mt_com.mt_op = comp->c_code; if (*argv) { mt_com.mt_count = strtol(*argv, &p, 10); if (mt_com.mt_count <= 0 || *p) errx(2, "%s: illegal count", *argv); } else mt_com.mt_count = 1; if ((host ? rmtioctl(mt_com.mt_op, mt_com.mt_count) : ioctl(mtfd, MTIOCTOP, &mt_com)) < 0) err(2, "%s: %s", tape, comp->c_name); } else { if (host) status(rmtstatus()); else { if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) err(2, "ioctl MTIOCGET"); status(&mt_status); } } if (host) rmtclose(); exit(X_FINOK); /* NOTREACHED */ } #ifdef sun #include #include #endif #ifdef tahoe #include #endif struct tape_desc { short t_type; /* type of magtape device */ char *t_name; /* printing name */ char *t_dsbits; /* "drive status" register */ char *t_erbits; /* "error" register */ } tapes[] = { #ifdef sun { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, #endif #ifdef tahoe { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, #endif { 0 } }; /* * Interpret the status buffer returned */ void status(bp) register struct mtget *bp; { register struct tape_desc *mt; for (mt = tapes;; mt++) { if (mt->t_type == 0) { (void)printf("%d: unknown tape drive type\n", bp->mt_type); return; } if (mt->t_type == bp->mt_type) break; } (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); printreg("ds", bp->mt_dsreg, mt->t_dsbits); printreg("\ner", bp->mt_erreg, mt->t_erbits); (void)putchar('\n'); } /* * Print a register a la the %b format of the kernel's printf. */ void printreg(s, v, bits) char *s; register u_int v; register char *bits; { register int i, any = 0; register char c; if (bits && *bits == 8) printf("%s=%o", s, v); else printf("%s=%x", s, v); bits++; if (v && bits) { putchar('<'); while ((i = *bits++)) { if (v & (1 << (i-1))) { if (any) putchar(','); any = 1; for (; (c = *bits) > 32; bits++) putchar(c); } else for (; *bits > 32; bits++) ; } putchar('>'); } } void usage() { (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); exit(X_USAGE); }