NAME

       acl_add_perm — add a permission to an ACL permission set

LIBRARY

       Linux Access Control Lists library (libacl, -lacl).

SYNOPSIS

       #include <sys/types.h>
       #include <sys/acl.h>

       int
       acl_add_perm(acl_permset_t permset_d, acl_perm_t perm);

DESCRIPTION

       The  acl_add_perm()  function  adds  the  permission  contained  in  the  argument perm (one of ACL_READ,
       ACL_WRITE, ACL_EXECUTE) to the permission set referred to by the argument permset_d.  An attempt to add a
       permission that is already contained in the permission set is not considered an error.

       Any existing descriptors that refer to permset_d continue to refer to that permission set.

RETURN VALUE

       The acl_add_perm() function returns the value 0 if successful; otherwise the value -1 is returned and the
       global variable errno is set to indicate the error.

ERRORS

       If any of the following conditions occur, the acl_add_perm() function returns -1 and sets  errno  to  the
       corresponding value:

       [EINVAL]           The  argument  permset_d  is not a valid descriptor for a permission set within an ACL
                          entry.

                          The argument perm does not contain a valid acl_perm_t value.

STANDARDS

       IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)

SEE ALSO

       acl_clear_perms(3), acl_delete_perm(3), acl_get_perm(3), acl_get_permset(3), acl_set_permset(3), acl(5)

AUTHOR

       Derived from the FreeBSD manual pages written by Robert N M Watson <rwatson@FreeBSD.org>, and adapted for
       Linux by Andreas Gruenbacher <andreas.gruenbacher@gmail.com>.

Linux ACL                                        March 23, 2002                                  ACL_ADD_PERM(3)