acl_to_text -- convert an ACL to text
Standard C Library (libc, -lc)
acl_to_text(acl_t acl, ssize_t *len_p);
The acl_to_text() function translates the ACL pointed to by argument acl
into a NULL terminated character string. If the pointer len_p is not
NULL, then the function shall return the length of the string (not
including the NULL terminator) in the location pointed to by len_p. The
format of the text string returned by acl_to_text() shall be the POSIX.1e
long ACL form.
This function allocates any memory necessary to contain the string and
returns a pointer to the string. The caller should free any releasable
memory, when the new string is no longer required, by calling acl_free(3)
with the (void*)char as an argument.
FreeBSD's support for POSIX.1e interfaces and features is still under
development at this time.
Upon successful completion, the function shall return a pointer to the
long text form of an ACL. Otherwise, a value of (char*)NULL shall be
returned and errno shall be set to indicate the error.
If any of the following conditions occur, the acl_to_text() function
shall return a value of (acl_t)NULL and set errno to the corresponding
[EINVAL] Argument acl does not point to a valid ACL.
The ACL denoted by acl contains one or more improperly
formed ACL entries, or for some other reason cannot be
translated into a text form of an ACL.
[ENOMEM] The character string to be returned requires more memory
than is allowed by the hardware or softwareimposed
memory management constraints.
acl(3), acl_free(3), acl_from_text(3), posix1e(3)
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft
continues on the cross-platform POSIX.1e implementation mailing list. To
join this list, see the FreeBSD POSIX.1e implementation page for more
POSIX.1e support was introduced in FreeBSD 4.0, and development continues.
Robert N M Watson
The acl_from_text() and acl_to_text() functions rely on the getpwent(3)
library calls to manage username and uid mapping, as well as the
getgrent(3) library calls to manage groupname and gid mapping. These
calls are not thread safe, and so transitively, neither are
acl_from_text() and acl_to_text(). These functions may also interfere
with stateful calls associated with the getpwent() and getgrent() calls.
FreeBSD 5.2.1 January 28, 2000 FreeBSD 5.2.1 [ Back ]