/********************************************************************** * Copyright (c) Digital Equipment Corporation 1984, 1985. * * All Rights Reserved. * * Reference "/usr/include/COPYRIGHT" for applicable restrictions. * **********************************************************************/ /* * Chung-Wu Lee, Jul-30-85 * * Ported from 2.9 BSD */ #ifndef lint static char *sccsid = "@(#)mt.c 3.0 4/21/86"; #endif lint #include <stdio.h> #include <ctype.h> #include <fcntl.h> #include <sys/types.h> #include <sys/mtio.h> #include <sys/ioctl.h> #define equal(s1,s2) (strcmp(s1, s2) == 0) struct commands { char *c_name; int c_code; int c_ronly; } com[] = { { "weof", MTWEOF, 0 }, { "eof", MTWEOF, 0 }, { "fsf", MTFSF, 1 }, { "bsf", MTBSF, 1 }, { "fsr", MTFSR, 1 }, { "bsr", MTBSR, 1 }, { "rewind", MTREW, 1 }, { "offline", MTOFFL, 1 }, { "rewoffl", MTOFFL, 1 }, { "status", MTNOP, 1 }, { "cache", MTCACHE, 1 }, { "nocache", MTNOCACHE, 1 }, { "cse", MTCSE, 1 }, { "clx", MTCLX, 1 }, { "cls", MTCLS, 1 }, { "async", MTASYNC, 1 }, { "noasync", MTNOASYNC, 1 }, { "enaeot", MTENAEOT, 1 }, { "diseot", MTDISEOT, 1 }, { 0 } }; int mtfd; struct mtop mt_com; struct mtget mt_status; char *tape; main(argc, argv) char **argv; { char line[80], *getenv(); register char *cp; register struct commands *comp; if (argc > 2 && (equal(argv[1], "-t") || equal(argv[1], "-f"))) { argc -= 2; tape = argv[2]; argv += 2; } else if ((tape = getenv("TAPE")) == NULL) tape = DEFTAPE; if (argc < 2) { fprintf(stderr, "usage: mt [ -f device ] command [ count ]\n"); exit(1); } cp = argv[1]; for (comp = com; comp->c_name != NULL; comp++) if (strncmp(cp, comp->c_name, strlen(cp)) == 0) break; if (comp->c_name == NULL) { fprintf(stderr, "mt: don't grok \"%s\"\n", cp); exit(1); } if (strcmp(comp->c_name,"clx") == 0 || strcmp(comp->c_name,"cls") == 0) { if ((mtfd = open(tape, O_NDELAY)) < 0) { perror(tape); exit(1); } } else { if ((mtfd = open(tape, comp->c_ronly ? 0 : 2)) < 0) { perror(tape); exit(1); } } if (comp->c_code != MTNOP) { mt_com.mt_op = comp->c_code; mt_com.mt_count = (argc > 2 ? atoi(argv[2]) : 1); if (mt_com.mt_count < 0) { fprintf(stderr, "mt: negative repeat count\n"); exit(1); } if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) { fprintf(stderr, "%s %s %d ", tape, comp->c_name, mt_com.mt_count); perror("failed"); exit(2); } } else { if (ioctl(mtfd, MTIOCGET, (char *)&mt_status) < 0) { perror("mt"); exit(2); } status(&mt_status); } } 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[] = { { MT_ISTS, "ts11/tu80/tsv05/tsu05/tk25", 0, TSXS0_BITS }, { MT_ISHT, "tm02/tm03", HTDS_BITS, HTER_BITS }, { MT_ISTM, "tm11", 0, TMER_BITS }, { MT_ISTK, "tk50/tu81", 0, 0 }, { 0 } }; /* * Follows are not supported by ULTRIX-11. * * { MT_ISMT, "tu78", MTDS_BITS, 0 }, * { MT_ISUT, "tu45", UTDS_BITS, UTER_BITS }, * */ /* * Interpret the status buffer returned */ status(bp) register struct mtget *bp; { register struct tape_desc *mt; for (mt = tapes; mt->t_type; mt++) if (mt->t_type == bp->mt_type) break; if (mt->t_type == 0) { printf("unknown tape drive type (%d)\n", bp->mt_type); return; } printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); if (mt->t_type == MT_ISTK) { printf("flags=0%o, ", (bp->mt_dsreg >> 8) & 0377); printf("endcode=0%o, ", bp->mt_dsreg & 0377); printf("status=0%o", bp->mt_erreg); } else { printreg("ds", bp->mt_dsreg, mt->t_dsbits); printreg("\ner", bp->mt_erreg, mt->t_erbits); } printf("\nsoftstat=<"); if (bp->mt_softstat&MT_EOT) printf("EOT,"); if (bp->mt_softstat&MT_DISEOT) printf("DISEOT"); else printf("ENAEOT"); if (bp->mt_softstat&MT_CACHE) printf(",CACHE"); printf(">\n"); } /* * Print a register a la the %b format of the kernel's printf */ printreg(s, v, bits) char *s; register char *bits; register unsigned short v; { 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('>'); } }