NAME
LIBRARY
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
n sys/types.h
n sys/acl.h
DESCRIPTION
The
function obtains a descriptor for an ACL entry as specified by
within the ACL indicated by the argument
If the value of
is ACL_FIRST_ENTRY, then the function returns in
a descriptor for the first ACL entry within
If the value of
is ACL_NEXT_ENTRY, then the function returns in
a descriptor for the next ACL entry within
If a call is made to
with
set to ACL_NEXT_ENTRY when there has not been either an initial
successful call to
or a previous successful call to
following a call to
or
then the effect is unspecified.
Calls to
do not modify any ACL entries. Subsequent operations using the returned
ACL entry descriptor operate on the ACL entry within the ACL in working
storage. The order of all existing entries in the ACL remains unchanged.
Any existing ACL entry descriptors that refer to entries within the ACL
continue to refer to those entries. Any existing ACL pointers that refer
to the ACL referred to by
continue to refer to the ACL.
RETURN VALUE
If the function successfully obtains an ACL entry, the function returns a
value of
If the ACL has no ACL entries, the function returns the value
If the value of
is ACL_NEXT_ENTRY and the last ACL entry in the ACL has already been
returned by a previous call to
the function returns the value
until a successful call with an
of ACL_FIRST_ENTRY is made. Otherwise, the value
is returned and
is set to indicate the error.
ERRORS
If any of the following conditions occur, the
function returns
and sets
to the corresponding value:
- EINVAL
The argument
is not a valid pointer to an ACL.
The argument
is neither ACL_NEXT_ENTRY nor ACL_FIRST_ENTRY.
STANDARDS
IEEE Std 1003.1e draft 17 (POSIX.1e, abandoned)
SEE ALSO
AUTHOR
Derived from the FreeBSD manual pages written by
and adapted for Linux by
