ACL_TO_TEXT(3) BSD Library Functions Manual ACL_TO_TEXT(3)NAMEacl_to_text — convert an ACL to text
LIBRARY
library “libposix1e”
SYNOPSIS
#include <sys/types.h>
#include <sys/acl.h>
char *
acl_to_text(acl_t acl, ssize_t *len_p);
DESCRIPTION
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.
IMPLEMENTATION NOTES
DragonFly's support for POSIX.1e interfaces and features is still under
development at this time.
RETURN VALUES
Upon successful completion, the function shall return a pointer to the
long text form of an ACL. Otherwise, a value of NULL shall be returned
and errno shall be set to indicate the error.
ERRORS
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
value:
[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 mem‐
ory than is allowed by the hardware or software-
imposed memory management constraints.
SEE ALSOacl(3), acl_free(3), acl_from_text(3), posix1e(3)STANDARDS
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
information.
HISTORY
POSIX.1e support was introduced in FreeBSD 4.0, and development contin‐
ues.
AUTHORS
Robert N M Watson
BUGS
These features are not yet fully implemented. In particular, the shipped
version of UFS/FFS does not support storage of additional security
labels, and so is unable to (easily) provide support for most of these
features.
acl_from_text() and acl_to_text() 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.
BSD January 28, 2000 BSD
