получить ACL по имени файла (get an ACL by filename)
Имя (Name)
acl_get_file — get an ACL by filename
Библиотека (Library)
Linux Access Control Lists library (libacl, -lacl).
Синопсис (Synopsis)
#include <sys/types.h>
#include <sys/acl.h>
acl_t
acl_get_file(const char *path_p, acl_type_t type);
Описание (Description)
The acl_get_file() function retrieves the access ACL associated
with a file or directory, or the default ACL associated with a
directory. The pathname for the file or directory is pointed to by
the argument path_p. The ACL is placed into working storage and
acl_get_file() returns a pointer to that storage.
In order to read an ACL from an object, a process must have read
access to the object's attributes.
The value of the argument type is used to indicate whether the
access ACL or the default ACL associated with path_p is returned.
If type is ACL_TYPE_ACCESS, the access ACL of path_p is returned.
If type is ACL_TYPE_DEFAULT, the default ACL of path_p is returned.
If type is ACL_TYPE_DEFAULT and no default ACL is associated with
the directory path_p, then an ACL containing zero ACL entries is
returned. If type specifies a type of ACL that cannot be associated
with path_p, then the function fails.
This function may cause memory to be allocated. The caller should
free any releasable memory, when the new ACL is no longer required,
by calling acl_free(3) with the (void*)acl_t returned by
acl_get_file() as an argument.
Возвращаемое значение (Return value)
On success, this function returns a pointer to the working storage.
On error, a value of (acl_t)NULL is returned, and errno is set
appropriately.
Ошибки (Error)
If any of the following conditions occur, the acl_get_file()
function returns a value of (acl_t)NULL and sets errno to the
corresponding value:
[EACCES] Search permission is denied for a component of
the path prefix or the object exists and the
process does not have appropriate access rights.
Argument type specifies a type of ACL that
cannot be associated with path_p.
[EINVAL] The argument type is not ACL_TYPE_ACCESS or
ACL_TYPE_DEFAULT.
[ENAMETOOLONG] The length of the argument path_p is too long.
[ENOENT] The named object does not exist or the argument
path_p points to an empty string.
[ENOMEM] The ACL working storage requires more memory
than is allowed by the hardware or system-
imposed memory management constraints.
[ENOTDIR] A component of the path prefix is not a
directory.
[ENOTSUP] The file system on which the file identified by
path_p is located does not support ACLs, or ACLs
are disabled.
Стандарты (Conforming to)
IEEE Std 1003.1e draft 17 ('POSIX.1e', abandoned)
Смотри также (See also)
acl_free(3), acl_get_entry(3), acl_get_fd(3), acl_set_file(3),
acl(5)
