acl_size(3)

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

NAME

4     acl_size — get the size of the external representation of an ACL
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_size(acl_t acl);
15

DESCRIPTION

17     The acl_size() function return the size, in bytes, of the buffer required
18     to hold the exportable, contiguous, persistent form of the ACL pointed to
19     by the argument acl, when converted by acl_copy_ext().
20
21     Any existing ACL entry descriptors that refer to entries in acl continue
22     to refer to the same entries. Any existing ACL pointers that refer to the
23     ACL referred to by acl continue to refer to the ACL. The order of ACL en‐
24     tries within acl remains unchanged.
25

RETURN VALUE

27     On success, the acl_size() function returns the size in bytes of the con‐
28     tiguous, persistent form of the ACL. On error, a value of (ssize_t)-1 is
29     returned and errno is set appropriately.
30

ERRORS

32     If any of the following conditions occur, the acl_size() function returns
33     a value of (ssize_t)-1 and sets errno to the corresponding value:
34
35     [EINVAL]           The argument acl is not a valid pointer to an ACL.
36

STANDARDS

38     IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
39

AUTHOR

44     Derived from the FreeBSD manual pages written by Robert N M Watson
45     <rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
46     <andreas.gruenbacher@gmail.com>.
47
48Linux ACL                       March 23, 2002                       Linux ACL