acl_check - check the validity of an ACL
cc [ flag… ] file… –lsec [ library… ] #include <sys/acl.h> int acl_check(acl_t *aclp, int isdir);
The acl_check() function checks the validity of an ACL pointed to by aclp. The isdir argument checks the validity of an ACL that will be applied to a directory. The ACL can be either a POSIX draft ACL as supported by UFS or NFSv4 ACL as supported by ZFS or NFSV4.
When the function verifies a POSIX draft ACL, the rules followed are described in aclcheck(3SEC). For NFSv4 ACL, the ACL is verified against the following rules:
The inheritance flags are valid.
The ACL must have at least one ACL entry and no more than the maximum number of entries (see acl(7)).
The permission field contains only supported permissions.
The entry type is valid.
The flag fields contain only valid flags as supported by NFSv4/ZFS.
If any of the above rules are violated, the function fails with errno set to EINVAL.
If the ACL is valid, acl_check() returns 0. Otherwise errno is set to EINVAL and the return value is set to one of the following:
There are invalid inheritance flags specified.
There are invalid flags specified on the ACL that don't map to supported flags in NFSV4/ZFS ACL model.
The ACL contains an unknown value in the type field.
The system cannot allocate any memory.
Inheritance flags are only allowed for ACLs on directories.
See attributes(7) for descriptions of the following attributes: