DCMD_CHR_TCFLUSH

Flush the input or output stream

Synopsis:

#include <sys/dcmd_chr.h>

#define DCMD_CHR_TCFLUSH   __DIOT(_CMD_IOCTL_TTY, 16, int) /* TIOCFLUSH */

Argument	Value
`filedes`	A file descriptor that you obtained by opening the device.
`dcmd`	DCMD_CHR_TCFLUSH
`dev_data_ptr`	A pointer to an int
`n_bytes`	`sizeof(int)`
`dev_info_ptr`	NULL

This command flushes the input and/or output stream associated with the file descriptor. It's also implemented as the TIOCFLUSH ioctl() command.

Note: This command is for internal use, and you shouldn't use it directly. Instead use the tcflush() cover function.

The queue selector; one of:

TCIFLUSH — discard all data that's received, but not yet read, on the device associated with fildes.
TCOFLUSH — discard all data that's written, but not yet transmitted, on the device associated with fildes.
TCIOFLUSH — discard all data that's written, but not yet transmitted, as well as all data that's received, but not yet read, on the device associated with fildes.

None.