acl_valid(3) — Linux manual page
ACL_VALID(3) Library Functions Manual ACL_VALID(3)
NAME
acl_valid — validate an ACL
LIBRARY
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
<sys/types.h> <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>.
COLOPHON
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 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-04-25.) 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
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