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* fhandler.cc (fhandler_base::open_9x): Handle O_SYNC and O_DIRECT

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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.
This commit is contained in:
Corinna Vinschen
2005-12-14 15:54:33 +00:00
parent 10cba930d4
commit e3d14af155
7 changed files with 127 additions and 78 deletions
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14
winsup/cygwin/fhandler.cc
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@ -492,6 +492,10 @@ fhandler_base::open_9x (int flags, mode_t mode)
file_attributes = FILE_ATTRIBUTE_NORMAL;
if (flags & O_DIROPEN)
file_attributes |= FILE_FLAG_BACKUP_SEMANTICS;
if (flags & O_SYNC)
file_attributes |= FILE_FLAG_WRITE_THROUGH;
if (flags & O_DIRECT)
file_attributes |= FILE_FLAG_NO_BUFFERING;
if (get_major () == DEV_SERIAL_MAJOR)
file_attributes |= FILE_FLAG_OVERLAPPED;
@ -599,18 +603,16 @@ fhandler_base::open (int flags, mode_t mode)
break;
default:
create_options = 0;
if (get_major () == DEV_TAPE_MAJOR && (flags & O_TEXT))
{
/* O_TEXT is used to indicate write-through on tape devices */
create_options |= FILE_WRITE_THROUGH;
flags &= ~O_TEXT;
}
if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
access = GENERIC_READ;
else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
access = GENERIC_WRITE | FILE_READ_ATTRIBUTES;
else
access = GENERIC_READ | GENERIC_WRITE;
if (flags & O_SYNC)
create_options |= FILE_WRITE_THROUGH;
if (flags & O_DIRECT)
create_options |= FILE_NO_INTERMEDIATE_BUFFERING;
if (get_major () != DEV_SERIAL_MAJOR && get_major () != DEV_TAPE_MAJOR)
{
create_options |= FILE_SYNCHRONOUS_IO_NONALERT;