priv_policy(9F) 					   Kernel Functions for Drivers 					   priv_policy(9F)

NAME

       priv_policy, priv_policy_only, priv_policy_choice - check, report, and audit privileges

SYNOPSIS

       #include <sys/cred.h>

       int priv_policy(const cred_t  *cr, int priv, int err, const char  *msg);

       int priv_policy_only(const cred_t  *cr, int priv);

       int priv_policy_choice(const cred_t  *cr, int priv);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       cr

	   The credential to be checked.

       priv

	   The integer value of the privilege to test.

       err

	   The error code to return.

       msg

	   String  that  is added to the privilege debugging message if one is generated. NULL if no additional information is needed. Because the
	   function name is included in the output, NULL is usually the best value to pass as a parameter.

DESCRIPTION

       These functions aid in privilege checking and privilege debugging.

       priv_policy(), priv_policy_only(), and priv_policy_choice() all check whether priv is asserted in the effective set of the credential.  The
       special value PRIV_ALL tests for all privileges.

       priv_policy()  updates  the  ASU accounting flag and records the privilege used on success in the audit trail if the required privilege was
       not a basic privilege.

       priv_policy_only() checks whether a privilege is asserted and has no side effects.

       priv_policy_choice() behaves like priv_policy_only() but records the successfully used non-basic privileges in the audit trail.

RETURN VALUES

       On success, priv_policy() return 0.  On failure it returns its parameter err.

       On success, priv_policy_choice() and priv_policy_only() return 1, on failure both return 0.

ERRORS

       EINVAL

	   This might be caused by any of the following:

	     o	The flags parameter is invalid.

	     o	The specified privilege does not exist.

	     o	The priv parameter contains invalid characters.

       ENOMEM

	   There is no room to allocate another privilege.

       ENAMETOOLONG

	   An attempt was made to allocate a privilege that was longer than {PRIVNAME_MAX} characters.

CONTEXT

       This functions can be called from user or interrupt context.

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       acct(3HEAD), attributes(5), privileges(5)

       Writing Device Drivers

SunOS 5.10							    9 Dec 2002							   priv_policy(9F)