ACL_VALID(3) | Library Functions Manual | ACL_VALID(3) |
acl_valid
,
acl_valid_fd_np
,
acl_valid_file_np
,
acl_valid_link_np
— validate
an ACL
Standard C Library (libc, -lc)
#include
<sys/types.h>
#include <sys/acl.h>
int
acl_valid
(acl_t
acl);
int
acl_valid_fd_np
(int
fd, acl_type_t
type, acl_t
acl);
int
acl_valid_file_np
(const
char *path_p, acl_type_t
type, acl_t
acl);
int
acl_valid_link_np
(const
char *path_p, acl_type_t
type, acl_t
acl);
These functions check that the ACL referred to by the argument
acl is valid. The POSIX.1e routine,
acl_valid
(),
checks assumes ACL_TYPE_EXTENDED, and disregard of the context in which the
ACL is to be used. The non-portable forms,
acl_valid_fd_np
(),
acl_valid_file_np
(),
and
acl_valid_link_np
()
allow an ACL to be checked in the context of a specific acl type,
type, and file system object. In environments where
additional ACL types are supported than just POSIX.1e, this makes more
sense. Whereas acl_valid_file_np
() will follow the
symlink if the specified path is to a symlink,
acl_valid_link_np
() will not.
The qualifier field shall be unique among all entries of the same POSIX.1e ACL facility defined tag type. The tag type field shall contain valid values including any implementation-defined values. Validation of the values of the qualifier field is implementation-defined.
The POSIX.1e
acl_valid
()
function may reorder the ACL for the purposes of verification; the
non-portable validation functions will not.
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
If any of the following conditions occur, these functions shall return -1 and set errno to the corresponding value:
EACCES
]EBADF
]EINVAL
]One or more of the required ACL entries is not present in acl.
The ACL contains entries that are not unique.
The file system rejects the ACL based on fs-specific semantics issues.
ENAMETOOLONG
]ENOENT
]ENOMEM
]EOPNOTSUPP
]POSIX.1e is described in IEEE POSIX.1e draft 17.
Michael Smith
Robert N M Watson
December 29, 2002 | macOS 14.6 |