* fhandler.cc (fhandler_base::open_9x): Handle O_SYNC and O_DIRECT
flags. (fhandler_base::open): Ditto. * fhandler_floppy.cc (fhandler_dev_floppy::open): Don't allocate devbuf in O_DIRECT case. * fhandler_raw.cc (fhandler_dev_raw::ioctl): Don't allow buffer changes in O_DIRECT case. Allow returning a buffer size 0, which indicates O_DIRECT. * fhandler_tape.cc (fhandler_dev_tape::open): Use O_SYNC flag to hand down the !buffer_writes case. Don't allocate devbuf in O_DIRECT case. (fhandler_dev_tape::raw_read): Don't mess with devbuf if it's NULL. * include/fcntl.h: Define _FDIRECT, O_DIRECT, O_DSYNC and O_RSYNC. * include/cygwin/version.h: Bump API minor version.
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@@ -161,9 +161,10 @@ fhandler_dev_floppy::open (int flags, mode_t)
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relatively big value increases performance by means. The new ioctl call
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with 'rdevio.h' header file supports changing this value.
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Let's try to be smart: Let's take a multiple of typical tar and cpio
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buffer sizes by default. */
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devbufsiz = 61440L;
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As default buffer size, we're using some value which is a multiple of
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the typical tar and cpio buffer sizes, Except O_DIRECT is set, in which
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case we're not buffering at all. */
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devbufsiz = (flags & O_DIRECT) ? 0L : 61440L;
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int ret = fhandler_dev_raw::open (flags);
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if (ret && get_drive_info (NULL))
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