iocblk(9S) Data Structures for Drivers iocblk(9S)NAME
iocblk - STREAMS data structure for the M_IOCTL message type
SYNOPSIS
#include <sys/stream.h>
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
DESCRIPTION
The iocblk data structure is used for passing M_IOCTL messages.
STRUCTURE MEMBERS
int ioc_cmd; /* ioctl command type */
cred_t *ioc_cr; /* full credentials */
uint_t ioc_id; /* ioctl id */
uint_t ioc_flag; /* ioctl flags */
uint_t ioc_count; /* count of bytes in data field */
int ioc_rval; /* return value */
int ioc_error; /* error code */
SEE ALSO
STREAMS Programming Guide
SunOS 5.11 13 Nov 1996 iocblk(9S)
Check Out this Related Man Page
mioc2ack(9F) Kernel Functions for Drivers mioc2ack(9F)NAME
mioc2ack - Convert an M_IOCTL message to an M_IOCACK message
SYNOPSIS
#include <sys/stream.h>
#include <sys/strsun.h>
void mioc2ack(mblk_t *mp, mblk_t *dp, size_t count, int rval);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
mp M_IOCTL message.
dp Payload to associate with M_IOCACK message.
count Value to set the ioc_count of the iocblk(9S) to.
rval Value to set the ioc_rval of the iocblk(9S) to.
DESCRIPTION
The mioc2ack() function converts an M_IOCTL message into an M_IOCACK message using the supplied arguments.
To convert the message, mioc2ack() changes the message type to M_IOCACK, sets the ioc_count and ioc_rval members of the iocblk(9S) associ-
ated with mp to the passed-in values, and clears the ioc_error field. Further, it frees any message blocks chained off of mp->b_cont and
resets mp->b_cont to dp. Finally, if dp is not NULL, mioc2ack() resets dp->b_wptr to be dp->b_rptr + count (that is, it sets dp to be
exactly count bytes in length).
RETURN VALUES
None.
CONTEXT
This function can be called from user, kernel or interrupt context.
SEE ALSO miocack(9F), miocnak(9F), iocblk(9S)
STREAMS Programming Guide
SunOS 5.10 9 June 2004 mioc2ack(9F)
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