ldi_putmsg(9F) Kernel Functions for Drivers ldi_putmsg(9F)NAME
ldi_putmsg, ldi_getmsg - Read/write message blocks from/to a stream
SYNOPSIS
#include <sys/sunldi.h>
int ldi_putmsg(ldi_handle_t lh, mblk_t *smp);
int ldi_getmsg(ldi_handle_t lh, mblk_t **rmp, timestruc_t *timeo);
PARAMETERS
lh Layered handle.
smp Message block to send.
rmp Message block to receive.
timeo Optional timeout for data reception.
DESCRIPTION
The ldi_putmsg function allows a caller to send a message block to a
streams device specified by the layered handle lh. Once the message
(smp) has been passed to ldi_putmsg(), the caller must not free the
message even if an error occurs.
The ldi_getmsg() function allows a caller to receive a message block
from a streams device specified by the layered handle lh. Callers must
free the message received with freemsg(9F).
If a NULL timeout value is specified when the caller receives a mes‐
sage, the caller sleeps until a message is received.
RETURN VALUES
The ldi_putmsg() and ldi_getmsg() functions return 0 upon success. If a
failure occurs before the request is passed to the device, the possible
return values are shown below. Otherwise any other error number may be
returned by the device.
EINVAL Invalid input parameters.
ENOTSUP Operation is not supported for this device.
The ldi_getmsg() function may also return:
ETIME Returned if the timeout timeo expires
with no messages received.
CONTEXT
These functions may be called from user or kernel context.
SunOS 5.10 3 June 2003 ldi_putmsg(9F)
