/* $NetBSD: mt.c,v 1.48 2018/09/01 06:56:23 mlelstv 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. 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1980, 1993\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93"; #else __RCSID("$NetBSD: mt.c,v 1.48 2018/09/01 06:56:23 mlelstv Exp $"); #endif #endif /* not lint */ /* * mt -- * magnetic tape manipulation program */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* pseudo ioctl constants */ #define MTASF 100 struct commands { const char *c_name; /* command */ size_t c_namelen; /* command len */ u_long c_spcl; /* ioctl request */ int c_code; /* ioctl code for MTIOCTOP command */ int c_ronly; /* open tape read-only */ int c_mincount; /* min allowed count value */ }; #define CMD(a) a, sizeof(a) - 1 static const struct commands com[] = { { CMD("asf"), MTIOCTOP, MTASF, 1, 0 }, { CMD("blocksize"), MTIOCTOP, MTSETBSIZ, 1, 0 }, { CMD("bsf"), MTIOCTOP, MTBSF, 1, 1 }, { CMD("bsr"), MTIOCTOP, MTBSR, 1, 1 }, { CMD("compress"), MTIOCTOP, MTCMPRESS, 1, 0 }, { CMD("density"), MTIOCTOP, MTSETDNSTY, 1, 0 }, { CMD("eof"), MTIOCTOP, MTWEOF, 0, 1 }, { CMD("eom"), MTIOCTOP, MTEOM, 1, 0 }, { CMD("erase"), MTIOCTOP, MTERASE, 0, 0 }, { CMD("fsf"), MTIOCTOP, MTFSF, 1, 1 }, { CMD("fsr"), MTIOCTOP, MTFSR, 1, 1 }, { CMD("offline"), MTIOCTOP, MTOFFL, 1, 0 }, { CMD("rdhpos"), MTIOCRDHPOS, 0, 1, 0 }, { CMD("rdspos"), MTIOCRDSPOS, 0, 1, 0 }, { CMD("retension"), MTIOCTOP, MTRETEN, 1, 0 }, { CMD("rewind"), MTIOCTOP, MTREW, 1, 0 }, { CMD("rewoffl"), MTIOCTOP, MTOFFL, 1, 0 }, { CMD("setblk"), MTIOCTOP, MTSETBSIZ, 1, 0 }, { CMD("setdensity"), MTIOCTOP, MTSETDNSTY, 1, 0 }, { CMD("sethpos"), MTIOCHLOCATE, 0, 1, 0 }, { CMD("setspos"), MTIOCSLOCATE, 0, 1, 0 }, { CMD("status"), MTIOCGET, MTNOP, 1, 0 }, { CMD("weof"), MTIOCTOP, MTWEOF, 0, 1 }, { CMD("eew"), MTIOCTOP, MTEWARN, 1, 0 }, { CMD("cache"), MTIOCTOP, MTCACHE, 1, 0 }, { CMD("nocache"), MTIOCTOP, MTNOCACHE, 1, 0 }, { .c_name = NULL } }; static void printreg(const char *, u_int, const char *); static void status(struct mtget *); __dead static void usage(void); int main(int argc, char *argv[]) { const struct commands *cp, *comp; struct mtget mt_status; struct mtop mt_com; int ch, mtfd, flags; char *p; const char *tape; int count; size_t len; setprogname(argv[0]); if ((tape = getenv("TAPE")) == NULL) tape = _PATH_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(); len = strlen(p = *argv++); for (comp = NULL, cp = com; cp->c_name != NULL; cp++) { size_t clen = MIN(len, cp->c_namelen); if (strncmp(p, cp->c_name, clen) == 0) { if (comp != NULL) errx(1, "%s: Ambiguous command `%s' or `%s'?", p, cp->c_name, comp->c_name); else comp = cp; } } if (comp == NULL) errx(1, "%s: unknown command", p); if (*argv) { count = strtol(*argv, &p, 10); if (count < comp->c_mincount || *p) errx(2, "%s: illegal count", *argv); } else count = 1; flags = comp->c_ronly ? O_RDONLY : O_WRONLY; if ((mtfd = open(tape, flags)) < 0) err(2, "%s", tape); switch (comp->c_spcl) { case MTIOCTOP: if (comp->c_code == MTASF) { /* If mtget.mt_fileno was implemented, We could compute the minimal seek needed to position the tape. Until then, rewind and seek from begining-of-tape */ mt_com.mt_op = MTREW; mt_com.mt_count = 1; if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) err(2, "%s", tape); if (count > 0) { mt_com.mt_op = MTFSF; mt_com.mt_count = count; if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) err(2, "%s", tape); } } else { mt_com.mt_op = comp->c_code; mt_com.mt_count = count; if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) err(2, "%s: %s", tape, comp->c_name); } break; case MTIOCGET: if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) err(2, "%s: %s", tape, comp->c_name); status(&mt_status); break; case MTIOCRDSPOS: case MTIOCRDHPOS: if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) err(2, "%s", tape); printf("%s: block location %u\n", tape, (unsigned int) count); break; case MTIOCSLOCATE: case MTIOCHLOCATE: if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) err(2, "%s", tape); break; default: errx(1, "internal error: unknown request %ld", comp->c_spcl); } exit(0); /* NOTREACHED */ } #if defined(sun) && !defined(__SVR4) #include #include #endif #ifdef tahoe #include #endif static const struct tape_desc { short t_type; /* type of magtape device */ const char *t_name; /* printing name */ const char *t_dsbits; /* "drive status" register */ const char *t_erbits; /* "error" register */ } tapes[] = { #if defined(sun) && !defined(__SVR4) { 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 #define SCSI_DS_BITS "\20\5WriteProtect\2Mounted" { 0x7, "SCSI", SCSI_DS_BITS, "76543210" }, { .t_type = 0 } }; /* * Interpret the status buffer returned */ static void status(struct mtget *bp) { const 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'); (void)printf("blocksize: %d (%d, %d, %d, %d)\n", bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], bp->mt_mblksiz[2], bp->mt_mblksiz[3]); (void)printf("density: %d (%d, %d, %d, %d)\n", bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], bp->mt_mdensity[2], bp->mt_mdensity[3]); (void)printf("current file number: %d\n", bp->mt_fileno); (void)printf("current block number: %d\n", bp->mt_blkno); } /* * Print a register a la the %b format of the kernel's printf. */ static void printreg(const char *s, u_int v, const char *bits) { int any, i; char c; any = 0; if (bits && *bits == 8) printf("%s=%o", s, v); else printf("%s=%x", s, v); if (v && bits && *++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('>'); } } static void usage(void) { (void)fprintf(stderr, "usage: %s [-f device] command [count]\n", getprogname()); exit(1); /* NOTREACHED */ }