Manual page for write(9E)
write - write data to a device
SYNOPSIS
#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);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
This entry point is
optional.
ARGUMENTS
- 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.
DESCRIPTION
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).
RETURN VALUES
The
write()
routine should return 0 for success,
or the appropriate error number.
SEE ALSO
read.2
read.9e
cb_ops.9s
uio.9s
Created by unroff & hp-tools.
© by Hans-Peter Bischof. All Rights Reserved (1997).
Last modified 21/April/97
