VOP_ACLCHECK -- check an access control list for a vnode
VOP_ACLCHECK(struct vnode *vp, acl_type_t type, struct acl *aclp,
struct ucred *cred, struct thread *td);
This vnode call may be used to determine the validity of a particular
access 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
allow 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).
No locks are required to call this vnode method, and any locks held on
entry will be held on exit.
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.
[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
[EOPNOTSUPP] The file system does not support VOP_ACLCHECK().
acl(9), vnode(9), VOP_GETACL(9), VOP_SETACL(9)
This man page was written by Robert Watson.
FreeBSD 5.2.1 December 23, 1999 FreeBSD 5.2.1 [ Back ]