MERROR(9F)MERROR(9F)NAMEmerror - Send an M_ERROR message upstream
SYNOPSIS
#include <sys/stream.h>
#include <sys/strsun.h>
void merror(queue_t *wq, mblk_t *mp, int error);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
wq
Write queue associated with the read queue to send the M_ERROR
on.
mp
Optionally, a STREAMS message to convert to an M_ERROR.
error
Error code to include in the M_ERROR message.
DESCRIPTION
The merror() function constructs an M_ERROR message, and sends the
resulting message upstream.
If mp is NULL, merror() allocates a one-byte M_ERROR message. If mp is
non-NULL, merror() attempts to convert the passed-in message to an
M_ERROR. However, if the passed-in message has more than one reference
(see dupmsg(9F)), or if it is of zero length, it is freed and a new
message is allocated.
If the allocation or conversion fails, merror() silently fails. Other‐
wise, the resulting one-byte data block is assigned the specified error
code and sent upstream.
RETURN VALUES
None.
CONTEXT
This function can be called from user, kernel or interrupt context.
NOTES
Callers must not hold any locks across an merror() that can be acquired
as part of put(9E) processing.
SEE ALSOput(9E), dupmsg(9F)
STREAMS Programming Guide
Jun 9, 2004 MERROR(9F)
