diff options
Diffstat (limited to 'winsup/cygwin/fhandler_floppy.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_floppy.cc | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/winsup/cygwin/fhandler_floppy.cc b/winsup/cygwin/fhandler_floppy.cc deleted file mode 100644 index 1357515aa..000000000 --- a/winsup/cygwin/fhandler_floppy.cc +++ /dev/null @@ -1,536 +0,0 @@ -/* fhandler_floppy.cc. See fhandler.h for a description of the - fhandler classes. - - Copyright 1999, 2000, 2001, 2002, 2003, 2004 Red Hat, Inc. - -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 <unistd.h> -#include <winioctl.h> -#include <cygwin/rdevio.h> -#include <cygwin/hdreg.h> -#include <cygwin/fs.h> -#include "cygerrno.h" -#include "security.h" -#include "path.h" -#include "fhandler.h" -#include "ntdll.h" - -#define IS_EOM(err) ((err) == ERROR_INVALID_PARAMETER \ - || (err) == ERROR_SEEK \ - || (err) == ERROR_SECTOR_NOT_FOUND) - -/**********************************************************************/ -/* fhandler_dev_floppy */ - -fhandler_dev_floppy::fhandler_dev_floppy () - : fhandler_dev_raw (), status () -{ -} - -int -fhandler_dev_floppy::get_drive_info (struct hd_geometry *geo) -{ - char dbuf[256]; - char pbuf[256]; - - DISK_GEOMETRY *di = NULL; - PARTITION_INFORMATION_EX *pix = NULL; - PARTITION_INFORMATION *pi = NULL; - DWORD bytes_read = 0; - - /* Always try using the new EX ioctls first (>= XP). If not available, - fall back to trying the old non-EX ioctls. - Unfortunately the EX ioctls are not implemented in the floppy driver. */ - if (wincap.has_disk_ex_ioctls () && get_major () != DEV_FLOPPY_MAJOR) - { - if (!DeviceIoControl (get_handle (), - IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, NULL, 0, - dbuf, 256, &bytes_read, NULL)) - __seterrno (); - else - { - di = &((DISK_GEOMETRY_EX *) dbuf)->Geometry; - if (!DeviceIoControl (get_handle (), - IOCTL_DISK_GET_PARTITION_INFO_EX, NULL, 0, - pbuf, 256, &bytes_read, NULL)) - __seterrno (); - else - pix = (PARTITION_INFORMATION_EX *) pbuf; - } - } - if (!di) - { - if (!DeviceIoControl (get_handle (), - IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0, - dbuf, 256, &bytes_read, NULL)) - __seterrno (); - else - { - di = (DISK_GEOMETRY *) dbuf; - if (!DeviceIoControl (get_handle (), - IOCTL_DISK_GET_PARTITION_INFO, NULL, 0, - pbuf, 256, &bytes_read, NULL)) - __seterrno (); - else - pi = (PARTITION_INFORMATION *) pbuf; - } - } - if (!di) - { - /* Up to Win2K, even IOCTL_DISK_GET_DRIVE_GEOMETRY fails when trying - it on CD or DVD drives. In that case fall back to requesting - simple file system information. */ - NTSTATUS status; - IO_STATUS_BLOCK io; - FILE_FS_SIZE_INFORMATION ffsi; - - status = NtQueryVolumeInformationFile (get_handle (), &io, &ffsi, - sizeof ffsi, - FileFsSizeInformation); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - return -1; - } - debug_printf ("fsys geometry: (%D units)*(%u sec)*(%u bps)", - ffsi.TotalAllocationUnits.QuadPart, - ffsi.SectorsPerAllocationUnit, - ffsi.BytesPerSector); - bytes_per_sector = ffsi.BytesPerSector; - drive_size = ffsi.TotalAllocationUnits.QuadPart - * ffsi.SectorsPerAllocationUnit - * ffsi.BytesPerSector; - if (geo) - { - geo->heads = 1; - geo->sectors = ffsi.SectorsPerAllocationUnit; - geo->cylinders = ffsi.TotalAllocationUnits.LowPart; - geo->start = 0; - } - } - else - { - debug_printf ("disk geometry: (%D cyl)*(%u trk)*(%u sec)*(%u bps)", - di->Cylinders.QuadPart, - di->TracksPerCylinder, - di->SectorsPerTrack, - di->BytesPerSector); - bytes_per_sector = di->BytesPerSector; - if (pix) - { - debug_printf ("partition info: offset %D length %D", - pix->StartingOffset.QuadPart, - pix->PartitionLength.QuadPart); - drive_size = pix->PartitionLength.QuadPart; - } - else if (pi) - { - debug_printf ("partition info: offset %D length %D", - pi->StartingOffset.QuadPart, - pi->PartitionLength.QuadPart); - drive_size = pi->PartitionLength.QuadPart; - } - else - { - /* Getting the partition size by using the drive geometry information - looks wrong, but this is a historical necessity. NT4 didn't - maintain partition information for the whole drive (aka - "partition 0"), but returned ERROR_INVALID_HANDLE instead. That - got fixed in W2K. */ - drive_size = di->Cylinders.QuadPart * di->TracksPerCylinder - * di->SectorsPerTrack * di->BytesPerSector; - } - if (geo) - { - geo->heads = di->TracksPerCylinder; - geo->sectors = di->SectorsPerTrack; - geo->cylinders = di->Cylinders.LowPart; - if (pix) - geo->start = pix->StartingOffset.QuadPart >> 9ULL; - else if (pi) - geo->start = pi->StartingOffset.QuadPart >> 9ULL; - else - geo->start = 0; - } - } - debug_printf ("drive size: %D", drive_size); - - return 0; -} - -/* Wrapper functions for ReadFile and WriteFile to simplify error handling. */ -BOOL -fhandler_dev_floppy::read_file (void *buf, DWORD to_read, DWORD *read, int *err) -{ - BOOL ret; - - *err = 0; - if (!(ret = ReadFile (get_handle (), buf, to_read, read, 0))) - *err = GetLastError (); - syscall_printf ("%d (err %d) = ReadFile (%d, %d, to_read %d, read %d, 0)", - ret, *err, get_handle (), buf, to_read, *read); - return ret; -} - -BOOL -fhandler_dev_floppy::write_file (const void *buf, DWORD to_write, - DWORD *written, int *err) -{ - BOOL ret; - - *err = 0; - if (!(ret = WriteFile (get_handle (), buf, to_write, written, 0))) - *err = GetLastError (); - syscall_printf ("%d (err %d) = WriteFile (%d, %d, write %d, written %d, 0)", - ret, *err, get_handle (), buf, to_write, *written); - return ret; -} - -int -fhandler_dev_floppy::open (int flags, mode_t) -{ - /* The correct size of the buffer would be 512 bytes, which is the atomic - size, supported by WinNT. Unfortunately, the performance is worse than - access to file system on same device! Setting buffer size to a - relatively big value increases performance by means. The new ioctl call - with 'rdevio.h' header file supports changing this value. - - As default buffer size, we're using some value which is a multiple of - the typical tar and cpio buffer sizes, Except O_DIRECT is set, in which - case we're not buffering at all. */ - devbufsiz = (flags & O_DIRECT) ? 0L : 61440L; - int ret = fhandler_dev_raw::open (flags); - - if (ret && get_drive_info (NULL)) - { - close (); - return 0; - } - - return ret; -} - -int -fhandler_dev_floppy::dup (fhandler_base *child) -{ - int ret = fhandler_dev_raw::dup (child); - - if (!ret) - { - fhandler_dev_floppy *fhc = (fhandler_dev_floppy *) child; - - fhc->drive_size = drive_size; - fhc->bytes_per_sector = bytes_per_sector; - fhc->eom_detected (eom_detected ()); - } - return ret; -} - -inline _off64_t -fhandler_dev_floppy::get_current_position () -{ - LARGE_INTEGER off = { QuadPart: 0LL }; - off.LowPart = SetFilePointer (get_handle (), 0, &off.HighPart, FILE_CURRENT); - return off.QuadPart; -} - -void -fhandler_dev_floppy::raw_read (void *ptr, size_t& ulen) -{ - DWORD bytes_read = 0; - DWORD read2; - DWORD bytes_to_read = 0; - int ret; - size_t len = ulen; - char *tgt; - char *p = (char *) ptr; - - /* Checking a previous end of media */ - if (eom_detected () && !lastblk_to_read ()) - { - set_errno (ENOSPC); - goto err; - } - - if (devbuf) - { - while (len > 0) - { - if (devbufstart < devbufend) - { - bytes_to_read = min (len, devbufend - devbufstart); - debug_printf ("read %d bytes from buffer (rest %d)", - bytes_to_read, - devbufend - devbufstart - bytes_to_read); - memcpy (p, devbuf + devbufstart, bytes_to_read); - len -= bytes_to_read; - p += bytes_to_read; - bytes_read += bytes_to_read; - devbufstart += bytes_to_read; - - if (lastblk_to_read ()) - { - lastblk_to_read (false); - break; - } - } - if (len > 0) - { - if (len >= devbufsiz) - { - bytes_to_read = (len / bytes_per_sector) * bytes_per_sector; - tgt = p; - } - else - { - tgt = devbuf; - bytes_to_read = devbufsiz; - } - _off64_t current_position = get_current_position (); - if (current_position + bytes_to_read >= drive_size) - bytes_to_read = drive_size - current_position; - if (!bytes_to_read) - break; - - debug_printf ("read %d bytes %s", bytes_to_read, - len < devbufsiz ? "into buffer" : "directly"); - if (!read_file (tgt, bytes_to_read, &read2, &ret)) - { - if (!IS_EOM (ret)) - { - __seterrno (); - goto err; - } - - eom_detected (true); - - if (!read2) - { - if (!bytes_read) - { - debug_printf ("return -1, set errno to ENOSPC"); - set_errno (ENOSPC); - goto err; - } - break; - } - lastblk_to_read (true); - } - if (!read2) - break; - if (tgt == devbuf) - { - devbufstart = 0; - devbufend = read2; - } - else - { - len -= read2; - p += read2; - bytes_read += read2; - } - } - } - } - else - { - _off64_t current_position = get_current_position (); - if (current_position + bytes_to_read >= drive_size) - bytes_to_read = drive_size - current_position; - if (bytes_to_read && !read_file (p, len, &bytes_read, &ret)) - { - if (!IS_EOM (ret)) - { - __seterrno (); - goto err; - } - if (bytes_read) - eom_detected (true); - else - { - debug_printf ("return -1, set errno to ENOSPC"); - set_errno (ENOSPC); - goto err; - } - } - } - - ulen = (size_t) bytes_read; - return; - -err: - ulen = (size_t) -1; -} - -int -fhandler_dev_floppy::raw_write (const void *ptr, size_t len) -{ - DWORD bytes_written = 0; - char *p = (char *) ptr; - int ret; - - /* Checking a previous end of media on tape */ - if (eom_detected ()) - { - set_errno (ENOSPC); - return -1; - } - - /* Invalidate buffer. */ - devbufstart = devbufend = 0; - - if (len > 0) - { - if (!write_file (p, len, &bytes_written, &ret)) - { - if (!IS_EOM (ret)) - { - __seterrno (); - return -1; - } - eom_detected (true); - if (!bytes_written) - { - set_errno (ENOSPC); - return -1; - } - } - } - return bytes_written; -} - -_off64_t -fhandler_dev_floppy::lseek (_off64_t offset, int whence) -{ - char buf[bytes_per_sector]; - _off64_t lloffset = offset; - _off64_t current_pos = (_off64_t) -1; - LARGE_INTEGER sector_aligned_offset; - size_t bytes_left; - - if (whence == SEEK_END) - { - lloffset += drive_size; - whence = SEEK_SET; - } - else if (whence == SEEK_CUR) - { - current_pos = get_current_position (); - lloffset += current_pos - (devbufend - devbufstart); - whence = SEEK_SET; - } - - if (whence != SEEK_SET || lloffset < 0 || lloffset > drive_size) - { - set_errno (EINVAL); - return -1; - } - - /* If new position is in buffered range, adjust buffer and return */ - if (devbufstart < devbufend) - { - if (current_pos == (_off64_t) -1) - current_pos = get_current_position (); - if (current_pos - devbufend <= lloffset && lloffset <= current_pos) - { - devbufstart = devbufend - (current_pos - lloffset); - return lloffset; - } - } - - sector_aligned_offset.QuadPart = (lloffset / bytes_per_sector) - * bytes_per_sector; - bytes_left = lloffset - sector_aligned_offset.QuadPart; - - /* Invalidate buffer. */ - devbufstart = devbufend = 0; - - sector_aligned_offset.LowPart = - SetFilePointer (get_handle (), - sector_aligned_offset.LowPart, - §or_aligned_offset.HighPart, - FILE_BEGIN); - if (sector_aligned_offset.LowPart == INVALID_SET_FILE_POINTER - && GetLastError ()) - { - __seterrno (); - return -1; - } - - eom_detected (false); - - if (bytes_left) - { - raw_read (buf, bytes_left); - if (bytes_left == (size_t) -1) - return -1; - } - - return sector_aligned_offset.QuadPart + bytes_left; -} - -int -fhandler_dev_floppy::ioctl (unsigned int cmd, void *buf) -{ - DISK_GEOMETRY di; - DWORD bytes_read; - switch (cmd) - { - case HDIO_GETGEO: - { - debug_printf ("HDIO_GETGEO"); - return get_drive_info ((struct hd_geometry *) buf); - } - case BLKGETSIZE: - case BLKGETSIZE64: - { - debug_printf ("BLKGETSIZE"); - if (cmd == BLKGETSIZE) - *(long *)buf = drive_size >> 9UL; - else - *(_off64_t *)buf = drive_size; - return 0; - } - case BLKRRPART: - { - debug_printf ("BLKRRPART"); - if (!DeviceIoControl (get_handle (), - IOCTL_DISK_UPDATE_DRIVE_SIZE, - NULL, 0, - &di, sizeof (di), - &bytes_read, NULL)) - { - __seterrno (); - return -1; - } - get_drive_info (NULL); - return 0; - } - case BLKSSZGET: - { - debug_printf ("BLKSSZGET"); - *(int *)buf = bytes_per_sector; - return 0; - } - case RDSETBLK: - /* Just check the restriction that blocksize must be a multiple - of the sector size of the underlying volume sector size, - then fall through to fhandler_dev_raw::ioctl. */ - if (((struct rdop *) buf)->rd_parm % bytes_per_sector) - { - SetLastError (ERROR_INVALID_PARAMETER); - __seterrno (); - return -1; - } - /*FALLTHRU*/ - default: - return fhandler_dev_raw::ioctl (cmd, buf); - } -} - |