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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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