write(9E) manual page
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write - write data to a device
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/open.h>
#include <sys/cred.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
int prefixwrite(dev_t dev, struct uio *uio_p, cred_t *cred_p);
Architecture independent level 1 (DDI/DKI). This entry point is optional.
- dev
- Device number.
- uio_p
- Pointer to the uio(9S)
structure that
describes where the data is to be stored in user space.
- cred_p
- Pointer to
the user credential structure for the I/O transaction.
Used
for character or raw data I/O, the driver write() routine is called indirectly
through cb_ops(9S)
by the write(2)
system call. The write() routine
supervises the data transfer from user space to a device described by the
uio(9S)
structure.
The write routine should check the validity of the
minor number component of dev and the user credentials pointed to by cred_p
(if pertinent).
The write() routine should return 0 for success,
or the appropriate error number.
read(2)
, write(2)
, read(9E)
, cb_ops(9S)
,
uio(9S)
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