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.
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
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.
This page is part of the acl (manipulating access control lists)
project. Information about the project can be found at
http://savannah.nongnu.org/projects/acl. If you have a bug report
for this manual page, see
⟨http://savannah.nongnu.org/bugs/?group=acl⟩. This page was
obtained from the project's upstream Git repository
⟨git://git.savannah.nongnu.org/acl.git⟩ on 2021-04-01. (At that
time, the date of the most recent commit that was found in the
repository was 2021-03-16.) If you discover any rendering problems
in this HTML version of the page, or you believe there is a better
or more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to email@example.com
Linux ACL March 23, 2002 Linux ACL