.\" Access Control Lists manual pages
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.\" (C) 2002 Andreas Gruenbacher, <a.gruenbacher@bestbits.at>
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.Dd March 23, 2002
.Dt ACL_ADD_PERM 3
.Os "Linux ACL"
.Sh NAME
.Nm acl_add_perm
.Nd add a permission to an ACL permission set
.Sh LIBRARY
Linux Access Control Lists library (libacl, \-lacl).
.Sh SYNOPSIS
.In sys/types.h
.In sys/acl.h
.Ft int
.Fn acl_add_perm "acl_permset_t permset_d" "acl_perm_t perm"
.Sh DESCRIPTION
The
.Fn acl_add_perm
function adds the permission contained in the argument
.Va perm
to the permission set referred to by the argument
.Va permset_d .
An attempt to add a permission that is already contained in the permission
set is not considered an error.
.Pp
Any existing descriptors that refer to
.Va permset_d
continue to refer to that permission set.
.Sh RETURN VALUE
.Rv -std acl_add_perm
.Sh ERRORS
If any of the following conditions occur, the
.Fn acl_add_perm
function returns
.Li -1
and sets
.Va errno
to the corresponding value:
.Bl -tag -width Er
.It Bq Er EINVAL
The argument
.Va permset_d
is not a valid descriptor for a permission set within an ACL entry.
.Pp
The argument
.Va perm
does not contain a valid
.Va acl_perm_t
value.
.El
.Sh STANDARDS
IEEE Std 1003.1e draft 17 (\(lqPOSIX.1e\(rq, abandoned)
.Sh SEE ALSO
.Xr acl_clear_perms 3 ,
.Xr acl_delete_perm 3 ,
.Xr acl_get_perm 3 ,
.Xr acl_get_permset 3 ,
.Xr acl_set_permset 3 ,
.Xr acl 5
.Sh AUTHOR
Derived from the FreeBSD manual pages written by
.An "Robert N M Watson" Aq rwatson@FreeBSD.org ,
and adapted for Linux by
.An "Andreas Gruenbacher" Aq a.gruenbacher@bestbits.at .
