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VOP_ACLCHECK(9)		 BSD Kernel Developer's	Manual	       VOP_ACLCHECK(9)

NAME
     VOP_ACLCHECK -- check an access control list for a	vnode

SYNOPSIS
     #include <sys/param.h>
     #include <sys/vnode.h>
     #include <sys/acl.h>

     int
     VOP_ACLCHECK(struct vnode *vp, acl_type_t type, struct acl	*aclp,
	 struct	ucred *cred, struct thread *td);

DESCRIPTION
     This vnode	call may be used to determine the validity of a	particular ac-
     cess control list (ACL) for a particular file or directory.

     Its arguments are:

     vp	   The vnode of	the file or directory.

     type  The type of ACL to check.

     aclp  A pointer to	an ACL structure from which to retrieve	the ACL	data.

     cred  The user credentials	to use in authorizing the request.

     td	   The thread checking the ACL.

     The cred pointer may be NULL to indicate that access control checks are
     not to be performed, if possible.	This cred setting might	be used	to al-
     low the kernel to authorize ACL verification that the active process
     might not be permitted to do.

     The vnode ACL interface defines the syntax, and not semantics, of file
     and directory ACL interfaces.  More information about ACL management in
     kernel may	be found in acl(9).

LOCKS
     No	locks are required to call this	vnode method, and any locks held on
     entry will	be held	on exit.

RETURN VALUES
     If	the aclp pointer points	to a valid ACL of type type for	the object vp,
     then zero is returned.  Otherwise,	an appropriate error code is returned.

ERRORS
     [EINVAL]		The ACL	type passed is invalid for this	vnode, or the
			ACL data is invalid.

     [EACCES]		The file or directory ACL does not permit access.

     [ENOMEM]		Sufficient memory is not available to fulfill the re-
			quest.

     [EOPNOTSUPP]	The file system	does not support VOP_ACLCHECK().

SEE ALSO
     acl(9), vnode(9), VOP_GETACL(9), VOP_SETACL(9)

AUTHORS
     This manual page was written by Robert Watson.

BSD			       December	23, 1999			   BSD

NAME | SYNOPSIS | DESCRIPTION | LOCKS | RETURN VALUES | ERRORS | SEE ALSO | AUTHORS

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