Copyright (c) 1999 Robert N. M. Watson
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$FreeBSD: releng/10.2/share/man/man9/VOP_ACLCHECK.9 206622 2010-04-14 19:08:06Z uqs $
.Dd December 23, 1999 .Dt VOP_ACLCHECK 9 .Os .Sh NAME .Nm VOP_ACLCHECK .Nd check an access control list for a vnode .Sh SYNOPSIS n sys/param.h n sys/vnode.h n sys/acl.h .Ft int .Fn VOP_ACLCHECK "struct vnode *vp" "acl_type_t type" "struct acl *aclp" "struct ucred *cred" "struct thread *td" .Sh DESCRIPTION This vnode call may be used to determine the validity of a particular access control list (ACL) for a particular file or directory.
p Its arguments are: l -tag -width type t Fa vp The vnode of the file or directory. t Fa type The type of ACL to check. t Fa aclp A pointer to an ACL structure from which to retrieve the ACL data. t Fa cred The user credentials to use in authorizing the request. t Fa td The thread checking the ACL. .El
p The .Fa 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.
p 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 .Xr acl 9 . .Sh LOCKS No locks are required to call this vnode method, and any locks held on entry will be held on exit. .Sh RETURN VALUES If the .Fa aclp pointer points to a valid ACL of type .Fa type for the object .Fa vp , then zero is returned. Otherwise, an appropriate error code is returned. .Sh ERRORS l -tag -width Er t Bq Er EINVAL The ACL type passed is invalid for this vnode, or the ACL data is invalid. t Bq Er EACCES The file or directory ACL does not permit access. t Bq Er ENOMEM Sufficient memory is not available to fulfill the request. t Bq Er EOPNOTSUPP The file system does not support .Fn VOP_ACLCHECK . .El .Sh SEE ALSO .Xr acl 9 , .Xr vnode 9 , .Xr VOP_GETACL 9 , .Xr VOP_SETACL 9 .Sh AUTHORS This manual page was written by .An Robert Watson .