STRQGET(9F)STRQGET(9F)NAMEstrqget - get information about a queue or band of the queue
SYNOPSIS
#include <sys/stream.h>
int strqget(queue_t *q, qfields_t what, unsigned char pri, void *valp);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
q
Pointer to the queue.
what
Field of the queue structure for (or the specified priority
band) to return information about. Valid values are one of:
QHIWAT
High water mark.
QLOWAT
Low water mark.
QMAXPSZ
Largest packet accepted.
QMINPSZ
Smallest packet accepted.
QCOUNT
Approximate size (in bytes) of data.
QFIRST
First message.
QLAST
Last message.
QFLAG
Status.
pri
Priority band of interest.
valp
The address of where to store the value of the requested field.
DESCRIPTION
The strqget() function gives drivers and modules a way to get informa‐
tion about a queue or a particular band of a queue without directly
accessing STREAMS data structures, thus insulating them from changes in
the implementation of these data structures from release to release.
RETURN VALUES
On success, 0 is returned and the value of the requested field is
stored in the location pointed to by valp. An error number is returned
on failure.
CONTEXT
The strqget() function can be called from user, interrupt, or kernel
context.
SEE ALSOstrqset(9F), queue(9S)
Writing Device Drivers
STREAMS Programming Guide
Jan 16, 2006 STRQGET(9F)
