acl_valid — validate an ACL

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)

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 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.

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

acl_valid — validate an ACL

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.

acl_check(3), acl_set_file(3), acl(5)

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

#include<sys/types.h>#include<sys/acl.h>intacl_valid(acl_tacl);