NAME

       acl_valid — validate an ACL

LIBRARY

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

SYNOPSIS

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

       int
       acl_valid(acl_t acl);

DESCRIPTION

       The acl_valid() function checks the ACL referred to by the argument acl for validity.

       The three required entries ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER must exist exactly once in the ACL.
       If  the  ACL contains any ACL_USER or ACL_GROUP entries, then an ACL_MASK entry is also required. The ACL
       may contain at most one ACL_MASK entry.

       The user identifiers must be unique among all entries of type ACL_USER.  The group  identifiers  must  be
       unique among all entries of type ACL_GROUP.

RETURN VALUE

       The  acl_valid()  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_valid() function returns  -1  and  sets  errno  to  the
       corresponding value:

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

                          The argument acl does not point to a valid ACL.

                          One or more of the required ACL entries is not present in acl.

                          The ACL contains entries that are not unique.

STANDARDS

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

SEE ALSO

       acl_check(3), acl_set_file(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_VALID(3)