91 lines
2.0 KiB
C++
91 lines
2.0 KiB
C++
/* fhandler_floppy.cc. See fhandler.h for a description of the
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fhandler classes.
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Copyright 1999, 2000 Cygnus Solutions.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <sys/termios.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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/**********************************************************************/
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/* fhandler_dev_floppy */
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int
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fhandler_dev_floppy::is_eom (int win_error)
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{
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int ret = (win_error == ERROR_INVALID_PARAMETER);
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if (ret)
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debug_printf ("end of medium");
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return ret;
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}
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int
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fhandler_dev_floppy::is_eof (int)
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{
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int ret = 0;
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if (ret)
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debug_printf ("end of file");
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return ret;
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}
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fhandler_dev_floppy::fhandler_dev_floppy (const char *name, int unit) : fhandler_dev_raw (FH_FLOPPY, name, unit)
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{
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set_cb (sizeof *this);
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}
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int
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fhandler_dev_floppy::open (const char *path, int flags, mode_t)
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{
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/* The correct size of the buffer would be 512 bytes,
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* which is the atomic size, supported by WinNT.
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* Unfortunately, the performance is worse than
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* access to file system on same device!
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* Setting buffer size to a relatively big value
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* increases performance by means.
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* The new ioctl call with 'rdevio.h' header file
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* supports changing this value.
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*
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* Let's be smart: Let's take a multiplier of typical tar
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* and cpio buffer sizes by default!
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*/
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devbufsiz = 61440L; /* 512L; */
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return fhandler_dev_raw::open (path, flags);
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}
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int
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fhandler_dev_floppy::close (void)
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{
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int ret;
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ret = writebuf ();
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if (ret)
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{
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fhandler_dev_raw::close ();
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return ret;
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}
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return fhandler_dev_raw::close ();
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}
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off_t
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fhandler_dev_floppy::lseek (off_t offset, int whence)
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{
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/* FIXME: Need to implement better. */
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offset = (offset / 512) * 512;
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return fhandler_base::lseek (offset, whence);
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}
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int
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fhandler_dev_floppy::ioctl (unsigned int cmd, void *buf)
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{
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return fhandler_dev_raw::ioctl (cmd, buf);
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}
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