diff options
Diffstat (limited to 'winsup/cygwin/fhandler_tape.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_tape.cc | 842 |
1 files changed, 0 insertions, 842 deletions
diff --git a/winsup/cygwin/fhandler_tape.cc b/winsup/cygwin/fhandler_tape.cc deleted file mode 100644 index 43bbf0f..0000000 --- a/winsup/cygwin/fhandler_tape.cc +++ /dev/null @@ -1,842 +0,0 @@ -/* fhandler_tape.cc. See fhandler.h for a description of the fhandler - classes. - - Copyright 1999, 2000 Cygnus Solutions. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <sys/termios.h> -#include <fcntl.h> -#include <errno.h> -#include <unistd.h> - -#include <sys/mtio.h> -#include "cygerrno.h" -#include "fhandler.h" -#include "path.h" - -/**********************************************************************/ -/* fhandler_dev_tape */ - -void -fhandler_dev_tape::clear (void) -{ - norewind = 0; - lasterr = 0; - fhandler_dev_raw::clear (); -} - -int -fhandler_dev_tape::is_eom (int win_error) -{ - int ret = ((win_error == ERROR_END_OF_MEDIA) - || (win_error == ERROR_EOM_OVERFLOW) - || (win_error == ERROR_NO_DATA_DETECTED)); - if (ret) - debug_printf ("end of medium"); - return ret; -} - -int -fhandler_dev_tape::is_eof (int win_error) -{ - int ret = ((win_error == ERROR_FILEMARK_DETECTED) - || (win_error == ERROR_SETMARK_DETECTED)); - if (ret) - debug_printf ("end of file"); - return ret; -} - -fhandler_dev_tape::fhandler_dev_tape (const char *name, int unit) : fhandler_dev_raw (FH_TAPE, name, unit) -{ - set_cb (sizeof *this); -} - -int -fhandler_dev_tape::open (const char *path, int flags, mode_t) -{ - int ret; - int minor; - - if (get_device_number (path, minor) != FH_TAPE) - { - set_errno (EINVAL); - return -1; - } - - norewind = (minor >= 128); - devbufsiz = 1L; - - ret = fhandler_dev_raw::open (path, flags); - if (ret) - { - struct mtget get; - struct mtop op; - struct mtpos pos; - - if (! ioctl (MTIOCGET, &get)) - /* Tape drive supports and is set to variable block size. */ - if (get.mt_dsreg == 0) - devbufsiz = get.mt_maxblksize; - else - devbufsiz = get.mt_dsreg; - varblkop = get.mt_dsreg == 0; - - if (devbufsiz > 1L) - devbuf = new char [ devbufsiz ]; - - /* The following rewind in position 0 solves a problem which appears - * in case of multi volume archives: The last ReadFile on first medium - * returns ERROR_NO_DATA_DETECTED. After media change, all subsequent - * ReadFile calls return ERROR_NO_DATA_DETECTED, too. - * The call to tape_set_pos seems to reset some internal flags. */ - if ((! ioctl (MTIOCPOS, &pos)) && (! pos.mt_blkno)) - { - op.mt_op = MTREW; - ioctl (MTIOCTOP, &op); - } - - if (flags & O_APPEND) - { - /* In append mode, seek to beginning of next filemark */ - op.mt_op = MTFSFM; - op.mt_count = 1; - ioctl (MTIOCTOP, &op); - } - } - - return ret; -} - -int -fhandler_dev_tape::close (void) -{ - struct mtop op; - int ret = 0; - - if (is_writing) - { - ret = writebuf (); - if ((has_written) && (! eom_detected)) - { - /* if last operation was writing, write a filemark */ - debug_printf ("writing filemark\n"); - op.mt_op = MTWEOF; - op.mt_count = 1; - ioctl (MTIOCTOP, &op); - } - } - - // To protected reads on signaling (e.g. Ctrl-C) - eof_detected = 1; - - if (! norewind) - { - debug_printf ("rewinding\n"); - op.mt_op = MTREW; - ioctl (MTIOCTOP, &op); - } - - if (ret) - { - fhandler_dev_raw::close (); - return ret; - } - - return fhandler_dev_raw::close (); -} - -int -fhandler_dev_tape::fstat (struct stat *buf) -{ - int ret; - - if (! (ret = fhandler_dev_raw::fstat (buf))) - { - struct mtget get; - - if (! ioctl (MTIOCGET, &get)) - { - buf->st_blocks = get.mt_capacity / buf->st_blksize; - } - } - - return ret; -} - -off_t -fhandler_dev_tape::lseek (off_t offset, int whence) -{ - struct mtop op; - struct mtpos pos; - - debug_printf ("lseek (%s, %d, %d)\n", get_name (), offset, whence); - - writebuf (); - eom_detected = eof_detected = 0; - lastblk_to_read = 0; - devbufstart = devbufend = 0; - - if (ioctl (MTIOCPOS, &pos)) - { - return (off_t) -1; - } - - switch (whence) - { - case SEEK_END: - op.mt_op = MTFSF; - op.mt_count = 1; - if (ioctl (MTIOCTOP, &op)) - return -1; - break; - case SEEK_SET: - if (whence == SEEK_SET && offset < 0) - { - set_errno (EINVAL); - return -1; - } - break; - case SEEK_CUR: - break; - default: - set_errno (EINVAL); - return -1; - } - - op.mt_op = MTFSR; - op.mt_count = offset / devbufsiz - - (whence == SEEK_SET ? pos.mt_blkno : 0); - - if (op.mt_count < 0) - { - op.mt_op = MTBSR; - op.mt_count = -op.mt_count; - } - - if (ioctl (MTIOCTOP, &op) || ioctl (MTIOCPOS, &pos)) - return -1; - - return (pos.mt_blkno * devbufsiz); -} - -int -fhandler_dev_tape::dup (fhandler_base *child) -{ - fhandler_dev_tape *fhc = (fhandler_dev_tape *) child; - - fhc->norewind = norewind; - fhc->lasterr = lasterr; - return fhandler_dev_raw::dup (child); -} - -int -fhandler_dev_tape::ioctl (unsigned int cmd, void *buf) -{ - int ret = NO_ERROR; - unsigned long block; - - if (cmd == MTIOCTOP) - { - struct mtop *op = (struct mtop *) buf; - - if (! op) - ret = ERROR_INVALID_PARAMETER; - else - switch (op->mt_op) - { - case MTRESET: - break; - case MTFSF: - ret = tape_set_pos (TAPE_SPACE_FILEMARKS, op->mt_count); - break; - case MTBSF: - ret = tape_set_pos (TAPE_SPACE_FILEMARKS, -op->mt_count); - break; - case MTFSR: - ret = tape_set_pos (TAPE_SPACE_RELATIVE_BLOCKS, op->mt_count); - break; - case MTBSR: - ret = tape_set_pos (TAPE_SPACE_RELATIVE_BLOCKS, -op->mt_count); - break; - case MTWEOF: - if (tape_get_feature (TAPE_DRIVE_WRITE_FILEMARKS)) - ret = tape_write_marks (TAPE_FILEMARKS, op->mt_count); - else if (tape_get_feature (TAPE_DRIVE_WRITE_LONG_FMKS)) - ret = tape_write_marks (TAPE_LONG_FILEMARKS, op->mt_count); - else - ret = tape_write_marks (TAPE_SHORT_FILEMARKS, op->mt_count); - break; - case MTREW: - ret = tape_set_pos (TAPE_REWIND, 0); - break; - case MTOFFL: - ret = tape_prepare (TAPE_UNLOAD); - break; - case MTNOP: - break; - case MTRETEN: - if (! tape_get_feature (TAPE_DRIVE_END_OF_DATA)) - ret = ERROR_INVALID_PARAMETER; - else if (! (ret = tape_set_pos (TAPE_REWIND, 0, FALSE))) - ret = tape_prepare (TAPE_TENSION); - break; - case MTBSFM: - ret = tape_set_pos (TAPE_SPACE_FILEMARKS, -op->mt_count, TRUE); - break; - case MTFSFM: - ret = tape_set_pos (TAPE_SPACE_FILEMARKS, op->mt_count, TRUE); - break; - case MTEOM: - if (tape_get_feature (TAPE_DRIVE_END_OF_DATA)) - ret = tape_set_pos (TAPE_SPACE_END_OF_DATA, 0); - else - ret = tape_set_pos (TAPE_SPACE_FILEMARKS, 32767); - break; - case MTERASE: - ret = tape_erase (TAPE_ERASE_SHORT); - break; - case MTRAS1: - case MTRAS2: - case MTRAS3: - ret = ERROR_INVALID_PARAMETER; - break; - case MTSETBLK: - { - long min, max; - - if (! tape_get_feature (TAPE_DRIVE_SET_BLOCK_SIZE)) - { - ret = ERROR_INVALID_PARAMETER; - break; - } - ret = tape_get_blocksize (&min, NULL, &max, NULL); - if (ret) - break; - if (devbuf && (size_t) op->mt_count == devbufsiz && !varblkop) - { - ret = 0; - break; - } - if ((op->mt_count == 0 - && !tape_get_feature (TAPE_DRIVE_VARIABLE_BLOCK)) - || (op->mt_count > 0 - && (op->mt_count < min || op->mt_count > max))) - { - ret = ERROR_INVALID_PARAMETER; - break; - } - if (devbuf && op->mt_count > 0 - && (size_t) op->mt_count < devbufend - devbufstart) - { - ret = ERROR_MORE_DATA; - break; - } - if (! (ret = tape_set_blocksize (op->mt_count))) - { - size_t size = 0; - if (op->mt_count == 0) - { - struct mtget get; - if ((ret = tape_status (&get)) != NO_ERROR) - break; - size = get.mt_maxblksize; - ret = NO_ERROR; - } - char *buf = new char [ size ]; - if (!buf) - { - ret = ERROR_OUTOFMEMORY; - break; - } - if (devbuf) - { - memcpy(buf,devbuf + devbufstart, devbufend - devbufstart); - devbufend -= devbufstart; - delete [] devbuf; - } - else - devbufend = 0; - devbufstart = 0; - devbuf = buf; - devbufsiz = size; - varblkop = op->mt_count == 0; - } - } - break; - case MTSETDENSITY: - ret = ERROR_INVALID_PARAMETER; - break; - case MTSEEK: - if (tape_get_feature (TAPE_DRIVE_ABSOLUTE_BLK)) - { - ret = tape_set_pos (TAPE_ABSOLUTE_BLOCK, op->mt_count); - break; - } - if (! (ret = tape_get_pos (&block))) - { - ret = tape_set_pos (TAPE_SPACE_RELATIVE_BLOCKS, - op->mt_count - block); - } - break; - case MTTELL: - if (! (ret = tape_get_pos (&block))) - op->mt_count = block; - break; - case MTSETDRVBUFFER: - ret = ERROR_INVALID_PARAMETER; - break; - case MTFSS: - ret = tape_set_pos (TAPE_SPACE_SETMARKS, op->mt_count); - break; - case MTBSS: - ret = tape_set_pos (TAPE_SPACE_SETMARKS, -op->mt_count); - break; - case MTWSM: - ret = tape_write_marks (TAPE_SETMARKS, op->mt_count); - break; - case MTLOCK: - ret = tape_prepare (TAPE_LOCK); - break; - case MTUNLOCK: - ret = tape_prepare (TAPE_UNLOCK); - break; - case MTLOAD: - ret = tape_prepare (TAPE_LOAD); - break; - case MTUNLOAD: - ret = tape_prepare (TAPE_UNLOAD); - break; - case MTCOMPRESSION: - ret = tape_compression (op->mt_count); - break; - case MTSETPART: - case MTMKPART: - default: - ret = ERROR_INVALID_PARAMETER; - break; - } - } - else if (cmd == MTIOCGET) - ret = tape_status ((struct mtget *) buf); - else if (cmd == MTIOCPOS) - { - ret = ERROR_INVALID_PARAMETER; - if (buf && (ret = tape_get_pos (&block))) - ((struct mtpos *) buf)->mt_blkno = block; - } - else - return fhandler_dev_raw::ioctl (cmd, buf); - - if (ret != NO_ERROR) - { - SetLastError (ret); - __seterrno (); - return -1; - } - - return 0; -} - -/* ------------------------------------------------------------------ */ -/* Private functions used by `ioctl' */ -/* ------------------------------------------------------------------ */ - -static int -tape_error (DWORD lasterr, const char *txt) -{ - if (lasterr) - debug_printf ("%s: error: %d\n", txt, lasterr); - - return lasterr; -} - -int -fhandler_dev_tape::tape_write_marks (int marktype, DWORD len) -{ - syscall_printf ("write_tapemark\n"); - while (((lasterr = WriteTapemark (get_handle (), - marktype, - len, - FALSE)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - return tape_error (lasterr, "tape_write_marks"); -} - -int -fhandler_dev_tape::tape_get_pos (unsigned long *ret) -{ - DWORD part, low, high; - - while (((lasterr = GetTapePosition (get_handle (), - TAPE_ABSOLUTE_POSITION, - &part, - &low, - &high)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - if (! tape_error (lasterr, "tape_get_pos") && ret) - *ret = low; - - return lasterr; -} - -static int _tape_set_pos (HANDLE hTape, int mode, long count) -{ - int err; - - while (((err = SetTapePosition (hTape, - mode, - 1, - count, - count < 0 ? -1 : 0, - FALSE)) == ERROR_MEDIA_CHANGED) - || (err == ERROR_BUS_RESET)) - ; - - return err; -} - -int -fhandler_dev_tape::tape_set_pos (int mode, long count, BOOLEAN sfm_func) -{ - unsigned long pos, tgtpos; - - switch (mode) - { - case TAPE_SPACE_RELATIVE_BLOCKS: - lasterr = tape_get_pos (&pos); - - if (lasterr) - return lasterr; - - tgtpos = pos + count; - - while (((lasterr = _tape_set_pos (get_handle (), - mode, - count)) == ERROR_FILEMARK_DETECTED) - || (lasterr == ERROR_SETMARK_DETECTED)) - { - lasterr = tape_get_pos (&pos); - if (lasterr) - return lasterr; - count = tgtpos - pos; - } - - if (lasterr == ERROR_BEGINNING_OF_MEDIA && ! tgtpos) - lasterr = NO_ERROR; - - break; - case TAPE_SPACE_FILEMARKS: - if (count < 0) - { - if (pos > 0) - { - if ((! _tape_set_pos (get_handle (), - TAPE_SPACE_RELATIVE_BLOCKS, - -1)) - || (sfm_func)) - ++count; - _tape_set_pos (get_handle (), TAPE_SPACE_RELATIVE_BLOCKS, 1); - } - - while (! (lasterr = _tape_set_pos (get_handle (), mode, -1)) - && count++ < 0) - ; - - if (lasterr == ERROR_BEGINNING_OF_MEDIA) - { - if (! count) - lasterr = NO_ERROR; - } - else if (! sfm_func) - lasterr = _tape_set_pos (get_handle (), mode, 1); - } - else - { - if (sfm_func) - { - if (_tape_set_pos (get_handle (), - TAPE_SPACE_RELATIVE_BLOCKS, - 1) == ERROR_FILEMARK_DETECTED) - ++count; - _tape_set_pos (get_handle (), TAPE_SPACE_RELATIVE_BLOCKS, -1); - } - - if (! (lasterr = _tape_set_pos (get_handle (), mode, count)) - && sfm_func) - lasterr = _tape_set_pos (get_handle (), mode, -1); - } - break; - case TAPE_SPACE_SETMARKS: - case TAPE_ABSOLUTE_BLOCK: - case TAPE_SPACE_END_OF_DATA: - case TAPE_REWIND: - lasterr = _tape_set_pos (get_handle (), mode, count); - break; - } - - return tape_error (lasterr, "tape_set_pos"); -} - -int -fhandler_dev_tape::tape_erase (int mode) -{ - DWORD varlen; - TAPE_GET_DRIVE_PARAMETERS dp; - - while (((lasterr = GetTapeParameters (get_handle (), - GET_TAPE_DRIVE_INFORMATION, - (varlen = sizeof dp, &varlen), - &dp)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - switch (mode) - { - case TAPE_ERASE_SHORT: - if (! lasterr && ! (dp.FeaturesLow & TAPE_DRIVE_ERASE_SHORT)) - mode = TAPE_ERASE_LONG; - break; - case TAPE_ERASE_LONG: - if (! lasterr && ! (dp.FeaturesLow & TAPE_DRIVE_ERASE_LONG)) - mode = TAPE_ERASE_SHORT; - break; - } - - return tape_error (EraseTape (get_handle (), mode, FALSE), "tape_erase"); -} - -int -fhandler_dev_tape::tape_prepare (int action) -{ - while (((lasterr = PrepareTape (get_handle (), - action, - FALSE)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - return tape_error (lasterr, "tape_prepare"); -} - -BOOLEAN -fhandler_dev_tape::tape_get_feature (DWORD parm) -{ - DWORD varlen; - TAPE_GET_DRIVE_PARAMETERS dp; - - while (((lasterr = GetTapeParameters (get_handle (), - GET_TAPE_DRIVE_INFORMATION, - (varlen = sizeof dp, &varlen), - &dp)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - if (lasterr) - return FALSE; - - return ((parm & TAPE_DRIVE_HIGH_FEATURES) - ? ((dp.FeaturesHigh & parm) != 0) - : ((dp.FeaturesLow & parm) != 0)); -} - -int -fhandler_dev_tape::tape_get_blocksize (long *min, long *def, long *max, long *cur) -{ - DWORD varlen; - TAPE_GET_DRIVE_PARAMETERS dp; - TAPE_GET_MEDIA_PARAMETERS mp; - - while (((lasterr = GetTapeParameters (get_handle (), - GET_TAPE_DRIVE_INFORMATION, - (varlen = sizeof dp, &varlen), - &dp)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - if (lasterr) - return tape_error (lasterr, "tape_get_blocksize"); - - while (((lasterr = GetTapeParameters (get_handle (), - GET_TAPE_MEDIA_INFORMATION, - (varlen = sizeof mp, &varlen), - &mp)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - if (lasterr) - return tape_error (lasterr, "tape_get_blocksize"); - - if (min) - *min = (long) dp.MinimumBlockSize; - if (def) - *def = (long) dp.DefaultBlockSize; - if (max) - *max = (long) dp.MaximumBlockSize; - if (cur) - *cur = (long) mp.BlockSize; - - return tape_error (lasterr, "tape_get_blocksize"); -} - -int -fhandler_dev_tape::tape_set_blocksize (long count) -{ - long min, max; - TAPE_SET_MEDIA_PARAMETERS mp; - - lasterr = tape_get_blocksize (&min, NULL, &max, NULL); - - if (lasterr) - return lasterr; - - if (count < min || count > max) - return tape_error (ERROR_INVALID_PARAMETER, "tape_set_blocksize"); - - mp.BlockSize = count; - - return tape_error (SetTapeParameters (get_handle (), - SET_TAPE_MEDIA_INFORMATION, - &mp), - "tape_set_blocksize"); -} - -static long long -get_ll (PLARGE_INTEGER i) -{ - long long l = 0; - - l = i->HighPart; - l <<= 32; - l |= i->LowPart; - return l; -} - -int -fhandler_dev_tape::tape_status (struct mtget *get) -{ - DWORD varlen; - TAPE_GET_DRIVE_PARAMETERS dp; - TAPE_GET_MEDIA_PARAMETERS mp; - int notape = 0; - - if (! get) - return ERROR_INVALID_PARAMETER; - - while (((lasterr = GetTapeParameters (get_handle (), - GET_TAPE_DRIVE_INFORMATION, - (varlen = sizeof dp, &varlen), - &dp)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - if ((lasterr) || (lasterr = GetTapeParameters (get_handle (), - GET_TAPE_MEDIA_INFORMATION, - (varlen = sizeof mp, &varlen), - &mp))) - notape = 1; - - memset (get, 0, sizeof *get); - - get->mt_type = MT_ISUNKNOWN; - - if (! notape && (dp.FeaturesLow & TAPE_DRIVE_TAPE_REMAINING)) - { - get->mt_remaining = get_ll (&mp.Remaining); - get->mt_resid = get->mt_remaining >> 10; - } - - if ((dp.FeaturesHigh & TAPE_DRIVE_SET_BLOCK_SIZE) && ! notape) - get->mt_dsreg = mp.BlockSize; - else - get->mt_dsreg = dp.DefaultBlockSize; - - if (notape) - get->mt_gstat |= GMT_DR_OPEN (-1); - - if (! notape) - { - if (dp.FeaturesLow & TAPE_DRIVE_GET_ABSOLUTE_BLK) - tape_get_pos ((unsigned long *) &get->mt_blkno); - - if (! get->mt_blkno) - get->mt_gstat |= GMT_BOT (-1); - - get->mt_gstat |= GMT_ONLINE (-1); - - if ((dp.FeaturesLow & TAPE_DRIVE_WRITE_PROTECT) && mp.WriteProtected) - get->mt_gstat |= GMT_WR_PROT (-1); - - if (dp.FeaturesLow & TAPE_DRIVE_TAPE_CAPACITY) - get->mt_capacity = get_ll (&mp.Capacity); - } - - if ((dp.FeaturesLow & TAPE_DRIVE_COMPRESSION) && dp.Compression) - get->mt_gstat |= GMT_HW_COMP (-1); - - if ((dp.FeaturesLow & TAPE_DRIVE_ECC) && dp.ECC) - get->mt_gstat |= GMT_HW_ECC (-1); - - if ((dp.FeaturesLow & TAPE_DRIVE_PADDING) && dp.DataPadding) - get->mt_gstat |= GMT_PADDING (-1); - - if ((dp.FeaturesLow & TAPE_DRIVE_REPORT_SMKS) && dp.ReportSetmarks) - get->mt_gstat |= GMT_IM_REP_EN (-1); - - get->mt_erreg = lasterr; - - get->mt_minblksize = dp.MinimumBlockSize; - get->mt_maxblksize = dp.MaximumBlockSize; - get->mt_defblksize = dp.DefaultBlockSize; - get->mt_featureslow = dp.FeaturesLow; - get->mt_featureshigh = dp.FeaturesHigh; - - return 0; -} - -int -fhandler_dev_tape::tape_compression (long count) -{ - DWORD varlen; - TAPE_GET_DRIVE_PARAMETERS dpg; - TAPE_SET_DRIVE_PARAMETERS dps; - - while (((lasterr = GetTapeParameters (get_handle (), - GET_TAPE_DRIVE_INFORMATION, - (varlen = sizeof dpg, &varlen), - &dpg)) == ERROR_MEDIA_CHANGED) - || (lasterr == ERROR_BUS_RESET)) - ; - - if (lasterr) - return tape_error (lasterr, "tape_compression"); - - if (! (dpg.FeaturesLow & TAPE_DRIVE_COMPRESSION)) - return ERROR_INVALID_PARAMETER; - - if (count) - { - dps.ECC = dpg.ECC; - dps.Compression = count ? TRUE : FALSE; - dps.DataPadding = dpg.DataPadding; - dps.ReportSetmarks = dpg.ReportSetmarks; - dps.EOTWarningZoneSize = dpg.EOTWarningZoneSize; - lasterr = SetTapeParameters (get_handle (), - SET_TAPE_DRIVE_INFORMATION, - &dps); - - if (lasterr) - return tape_error (lasterr, "tape_compression"); - - dpg.Compression = dps.Compression; - } - - return 0; -} - |