NAME

       acl_equiv_mode — check for an equivalent ACL

LIBRARY

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

SYNOPSIS

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

       int
       acl_equiv_mode(acl_t acl, mode_t *mode_p);

DESCRIPTION

       The acl_equiv_mode() function checks if the ACL pointed to by the argument acl contains only the required
       ACL  entries  of  tag types ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER, and contains no permissions other
       that ACL_READ, ACL_WRITE or ACL_EXECUTE.  If the ACL has this form, it can can be fully represented  with
       the  traditional  file permission bits, and is considered equivalent with the traditional file permission
       bits.

       If acl is an equivalent ACL and the pointer mode_p is not NULL, the value pointed to by mode_p is set  to
       the value that defines the same owner, group and other permissions as contained in the ACL.

RETURN VALUE

       On  success, this function returns the value 0 if acl is an equivalent ACL, and the value 1 if acl is not
       an equivalent ACL. On error, the value -1 is returned, and errno is set appropriately.

ERRORS

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

       [EINVAL]           The argument acl is not a valid pointer to an ACL.

STANDARDS

       This  is  a  non-portable, Linux specific extension to the ACL manipulation functions defined in IEEE Std
       1003.1e draft 17 (“POSIX.1e”, abandoned).

SEE ALSO

       acl_from_mode(3), acl(5)

AUTHOR

       Written by Andreas Gruenbacher <andreas.gruenbacher@gmail.com>.

Linux ACL                                        March 23, 2002                                ACL_EQUIV_MODE(3)