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


SYNOPSIS

     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 argu­
     ment acl contains only the required ACL entries of tag types ACL_US­
     ER_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

     Upon successful completion, this function returns the value 0 if acl is
     an equivalent ACL, and the value 1 if acl is not an equivalent ACL. Oth­
     erwise, the value -1 is returned, and errno is set to indicate the error.


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 <a.gruenbacher@computer.org>.

 Linux ACL                      March 23, 2002                               1

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