#include <sys/stream.h>int strqset(queue_t *q, qfields_t what, unsigned char pri, intptr_t val);
Architecture independent level 1 (DDI/DKI).
Pointer to the queue.
High water mark.
Low water mark.
Largest packet accepted.
Smallest packet accepted.
Priority band of interest.
The value for the field to be changed.
strqset() gives drivers and modules a way to change information about a queue or a particular band of a queue without directly accessing STREAMS data structures.
On success, 0 is returned. EINVAL is returned if an undefined attribute is specified.
strqset() can be called from user or interrupt context.
The stream must be frozen using freezestr(9F) before calling strqset()
To set the values of QMINPSZ and QMAXPSZ from within a single call to freezestr(9F) and unfreezestr(9F): when lowering the existing values, set QMINPSZ before setting QMAXPSZ; when raising the existing values, set QMAXPSZ before setting QMINPSZ.