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ACL_TO_TEXT(3)		 BSD Library Functions Manual		ACL_TO_TEXT(3)

NAME
     acl_to_text, acl_to_text_np -- convert an ACL to text

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/acl.h>

     char *
     acl_to_text(acl_t acl, ssize_t *len_p);

     char *
     acl_to_text_np(acl_t acl, ssize_t *len_p, int flags);

DESCRIPTION
     The acl_to_text() and acl_to_text_np() functions translate	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.  If the ACL is POSIX.1e, the format of the text string re-
     turned by acl_to_text() shall be the POSIX.1e long	ACL form.  If the ACL
     is	NFSv4, the format of the text string shall be the compact form,	unless
     the ACL_TEXT_VERBOSE flag is given.

     The flags specified are formed by or'ing the following values

	ACL_TEXT_VERBOSE	Format ACL using verbose form
	ACL_TEXT_NUMERIC_IDS	Do not resolve IDs into	user or	group names
	ACL_TEXT_APPEND_ID	In addition to user and	group names, append
				numeric	IDs

     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
     FreeBSD's support for POSIX.1e interfaces and features is still under de-
     velopment 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 (char*)NULL shall	be re-
     turned 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-im-
			posed memory management	constraints.

SEE ALSO
     acl(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 in-
     formation.

HISTORY
     POSIX.1e support was introduced in	FreeBSD	4.0, and development contin-
     ues.

AUTHORS
     Robert N M	Watson

BUGS
     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.

BSD				 June 25, 2009				   BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | AUTHORS | BUGS

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