svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
awrite(9e)
awrite(9E) Driver Entry Points awrite(9E)
NAME
awrite - asynchronous write to a device
SYNOPSIS
#include <sys/uio.h>
#include <sys/aio_req.h>
#include <sys/cred.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
int prefixawrite(dev_t dev, struct aio_req *aio_reqp,
cred_t *cred_p);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). This entry point is optional. Driv‐
ers that do not support an awrite() entry point should use nodev(9F)
PARAMETERS
dev Device number.
aio_reqp Pointer to the aio_req(9S) structure that describes where
the data is stored.
cred_p Pointer to the credential structure.
DESCRIPTION
The driver's awrite() routine is called to perform an asynchronous
write. getminor(9F) can be used to access the minor number component of
the dev argument. awrite() may use the credential structure pointed to
by cred_p to check for required privileges by calling drv_priv(9F). The
awrite() routine may also examine the uio(9S) structure through the
aio_req structure pointer, aio_reqp. awrite() must call aphysio(9F)
with the aio_req pointer and a pointer to the driver's strategy(9E)
routine.
No fields of the uio(9S) structure pointed to by aio_req, other than
uio_offset or uio_loffset, may be modified for non-seekable devices.
RETURN VALUES
The awrite() routine should return 0 for success, or the appropriate
error number.
CONTEXT
This function is called from user context only.
EXAMPLES
Example 1 Using the awrite() routine:
The following is an example of an awrite() routine:
static int
xxawrite(dev_t dev, struct aio_req *aio, cred_t *cred_p)
{
int instance;
struct xxstate *xsp;
instance = getminor(dev);
xsp = ddi_get_soft_state(statep, instance);
/* Verify soft state structure has been allocated */
if (xsp == NULL)
return (ENXIO);
return (aphysio(xxstrategy, anocancel, dev, B_WRITE, \
xxminphys, aio));
}
SEE ALSO
write(2), aiowrite(3C), aread(9E), read(9E), strategy(9E), write(9E),
anocancel(9F), aphysio(9F), ddi_get_soft_state(9F), drv_priv(9F), get‐
minor(9F), minphys(9F), nodev(9F), aio_req(9S), cb_ops(9S), uio(9S)
Writing Device Drivers in Oracle Solaris 11.4
BUGS
There is no way other than calling aphysio(9F) to accomplish an asyn‐
chronous write.
Oracle Solaris 11.4 3 Nov 2021 awrite(9E)