1ACL_COPY_EXT(3)          BSD Library Functions Manual          ACL_COPY_EXT(3)
2

NAME

4     acl_copy_ext — copy an ACL from internal to external representation
5

LIBRARY

7     Linux Access Control Lists library (libacl, -lacl).
8

SYNOPSIS

10     #include <sys/types.h>
11     #include <sys/acl.h>
12
13     ssize_t
14     acl_copy_ext(void *buf_p, acl_t acl, ssize_t size);
15

DESCRIPTION

17     The acl_copy_ext() function copies the ACL pointed to by acl from system-
18     managed space to the user managed space pointed to by buf_p.  The size
19     parameter represents the size in bytes of the buffer pointed to by buf_p.
20     The format of the ACL placed in the buffer pointed to by buf_p is a con‐
21     tiguous, persistent data item, the format of which is unspecified.  It is
22     the responsibility of the invoker to allocate an area large enough to
23     hold the copied ACL. The size of the exportable, contiguous, persistent
24     form of the ACL may be obtained by invoking the acl_size() function.
25
26     Any ACL entry descriptors that refer to an entry in the ACL referenced by
27     acl continue to refer to those entries. Any existing ACL pointers that
28     refer to the ACL referenced by acl continue to refer to the ACL.
29

RETURN VALUE

31     Upon success, this function returns the number of bytes placed in the
32     buffer pointed to by buf_p.  On error, a value of (ssize_t)-1 is returned
33     and errno is set appropriately.
34

ERRORS

36     If any of the following conditions occur, the acl_copy_ext() function
37     returns a value of (ssize_t)-1 and sets errno to the corresponding value:
38
39     [EINVAL]           The size parameter is zero or negative.
40
41                        The argument acl is not a valid pointer to an ACL.
42
43                        The ACL referenced by acl contains one or more improp‐
44                        erly formed ACL entries, or for some other reason can‐
45                        not be translated into the external form of an ACL.
46
47     [ERANGE]           The size parameter is greater than zero but smaller
48                        than the length of the contiguous, persistent form of
49                        the ACL.
50

STANDARDS

52     IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
53

SEE ALSO

55     acl_copy_int(3), acl_size(3), acl(5)
56

AUTHOR

58     Derived from the FreeBSD manual pages written by Robert N M Watson
59     <rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
60     <a.gruenbacher@bestbits.at>.
61
62Linux ACL                       March 23, 2002                       Linux ACL
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