Content-type: text/html Man page of drv_priv

drv_priv

Section: Kernel Functions for Drivers (9F)
Updated: 16 Jan 2006
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NAME

drv_priv - determine driver privilege  

SYNOPSIS

#include <sys/types.h>
#include <sys/cred.h>
#include <sys/ddi.h>

int drv_priv(cred_t *cr);  

INTERFACE LEVEL

Architecture independent level 1 (DDI/DKI).  

PARAMETERS

cr Pointer to the user credential structure.

 

DESCRIPTION

The drv_priv() function provides a general interface to the system privilege policy. It determines whether the credentials supplied by the user credential structure pointed to by cr identify a process that has the {PRIV_SYS_DEVICES} privilege asserted in its effective set. This function should be used only when file access modes, special minor device numbers, and the device policy (see privileges(5), add_drv(1M)) are insufficient to provide protection for the requested driver function. It is intended to replace all calls to suser() and any explicit checks for effective user ID = 0 in driver code.  

RETURN VALUES

This routine returns 0 if it succeeds, EPERM if it fails.  

CONTEXT

The drv_priv() function can be called from user, interrupt, or kernel context.  

SEE ALSO

add_drv(1M), update_drv(1M), privileges(5)

Writing Device Drivers


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
SEE ALSO

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Time: 02:39:47 GMT, October 02, 2010