/* mt -- control magnetic tape drive operation Copyright (C) 1991, 1992 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* If -f is not given, the environment variable TAPE is used; if that is not set, a default device defined in sys/mtio.h is used. The device must be either a character special file or a remote tape drive with the form "[user@]system:path". The default count is 1. Some operations ignore it. Exit status: 0 success 1 invalid operation or device name 2 operation failed Operations (unique abbreviations are accepted): eof, weof Write COUNT EOF marks at current position on tape. fsf Forward space COUNT files. Tape is positioned on the first block of the file. bsf Backward space COUNT files. Tape is positioned on the first block of the file. fsr Forward space COUNT records. bsr Backward space COUNT records. bsfm Backward space COUNT file marks. Tape is positioned on the beginning-of-the-tape side of the file mark. asf Absolute space to file number COUNT. Equivalent to rewind followed by fsf COUNT. eom Space to the end of the recorded media on the tape (for appending files onto tapes). rewind Rewind the tape. offline, rewoffl Rewind the tape and, if applicable, unload the tape. status Print status information about the tape unit. retension Rewind the tape, then wind it to the end of the reel, then rewind it again. erase Erase the tape. David MacKenzie */ #include #include #include #include #include #include #include #include #include #if defined(HAVE_UNISTD_H) #include #endif #include "rmt.h" #if defined(HAVE_STRING_H) || defined(STDC_HEADERS) #include #else #include #endif #if defined(STDC_HEADERS) #include #else extern int errno; char *getenv (); int atoi (); void exit (); #endif int fstat (); int argmatch (); void check_type (); void error (); void invalid_arg (); void perform_operation (); void print_status (); void usage (); char *opnames[] = { "eof", "weof", "fsf", "bsf", "fsr", "bsr", "rewind", "offline", "rewoffl", "status", #ifdef MTBSFM "bsfm", #endif #ifdef MTEOM "eom", #endif #ifdef MTRETEN "retension", #endif #ifdef MTERASE "erase", #endif "asf", NULL }; #define MTASF 600 /* Random unused number. */ short operations[] = { MTWEOF, MTWEOF, MTFSF, MTBSF, MTFSR, MTBSR, MTREW, MTOFFL, MTOFFL, MTNOP, #ifdef MTBSFM MTBSFM, #endif #ifdef MTEOM MTEOM, #endif #ifdef MTRETEN MTRETEN, #endif #ifdef MTERASE MTERASE, #endif MTASF }; /* If nonzero, don't consider file names that contain a `:' to be on remote hosts; all files are local. Always zero for mt; since when do local device names contain colons? */ int f_force_local = 0; struct option longopts[] = { {"file", 1, NULL, 'f'}, {"version", 0, NULL, 'V'}, {NULL, 0, NULL, 0} }; /* The name this program was run with. */ char *program_name; void main (argc, argv) int argc; char **argv; { extern char *version_string; short operation; int count; char *tapedev; int tapedesc; int i; program_name = argv[0]; tapedev = NULL; count = 1; while ((i = getopt_long (argc, argv, "f:V", longopts, (int *) 0)) != -1) { switch (i) { case 'f': tapedev = optarg; break; case 'V': printf ("GNU mt %s", version_string); exit (0); break; default: usage (); } } if (optind == argc) usage (); i = argmatch (argv[optind], opnames); if (i < 0) { invalid_arg ("tape operation", argv[optind], i); exit (1); } operation = operations[i]; if (++optind < argc) count = atoi (argv[optind]); if (++optind < argc) usage (); if (tapedev == NULL) { tapedev = getenv ("TAPE"); if (tapedev == NULL) #ifdef DEFTAPE /* From sys/mtio.h. */ tapedev = DEFTAPE; #else error (1, 0, "no tape device specified"); #endif } tapedesc = rmtopen (tapedev, O_RDONLY, 0); if (tapedesc == -1) error (1, errno, "%s", tapedev); check_type (tapedev, tapedesc); if (operation == MTASF) { perform_operation (tapedev, tapedesc, MTREW, 1); operation = MTFSF; } perform_operation (tapedev, tapedesc, operation, count); if (operation == MTNOP) print_status (tapedev, tapedesc); if (rmtclose (tapedesc) == -1) error (2, errno, "%s", tapedev); exit (0); } void check_type (dev, desc) char *dev; int desc; { struct stat stats; if (_isrmt (desc)) return; if (fstat (desc, &stats) == -1) error (1, errno, "%s", dev); if ((stats.st_mode & S_IFMT) != S_IFCHR) error (1, 0, "%s is not a character special file", dev); } void perform_operation (dev, desc, op, count) char *dev; int desc; short op; int count; { struct mtop control; control.mt_op = op; control.mt_count = count; if (rmtioctl (desc, MTIOCTOP, &control)) error (2, errno, "%s", dev); } void print_status (dev, desc) char *dev; int desc; { struct mtget status; if (rmtioctl (desc, MTIOCGET, &status)) error (2, errno, "%s", dev); printf ("drive type = %d\n", (int) status.mt_type); #if defined(hpux) || defined(__hpux__) printf ("drive status (high) = %d\n", (int) status.mt_dsreg1); printf ("drive status (low) = %d\n", (int) status.mt_dsreg2); #else printf ("drive status = %d\n", (int) status.mt_dsreg); #endif printf ("sense key error = %d\n", (int) status.mt_erreg); printf ("residue count = %d\n", (int) status.mt_resid); #if !defined(ultrix) && !defined(__ultrix__) && !defined(hpux) && !defined(__hppux__) printf ("file number = %d\n", (int) status.mt_fileno); printf ("block number = %d\n", (int) status.mt_blkno); #endif } void usage () { fprintf (stderr, "\ Usage: %s [-V] [-f device] [--file=device] [--version] operation [count]\n", program_name); exit (1); }