NAME

       acl_get_fd — get an ACL by file descriptor

LIBRARY

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

SYNOPSIS

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

       acl_t
       acl_get_fd(int fd);

DESCRIPTION

       The  acl_get_fd()  function retrieves the access ACL associated with the file referred to by fd.  The ACL
       is placed into working storage and acl_get_fd() returns a pointer to that storage.

       In order to read an ACL from an object, a process must have read access to the object's attributes.

       This function may cause memory to be allocated.  The caller should free any releasable memory,  when  the
       new  ACL  is no longer required, by calling acl_free(3) with the (void*)acl_t returned by acl_get_fd() as
       an argument.

RETURN VALUE

       On success, this function shall return  a  pointer  to  the  working  storage.   On  error,  a  value  of
       (acl_t)NULL shall be returned, and errno is set appropriately.

ERRORS

       If  any  of  the following conditions occur, the acl_get_fd() function returns a value of (acl_t)NULL and
       sets errno to the corresponding value:

       [EBADF]            The fd argument is not a valid file descriptor.

       [ENOMEM]           The ACL working storage requires more memory  than  is  allowed  by  the  hardware  or
                          system-imposed memory management constraints.

       [ENOTSUP]          The  file  system on which the file identified by fd is located does not support ACLs,
                          or ACLs are disabled.

STANDARDS

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

SEE ALSO

       acl_free(3), acl_get_entry(3), acl_get_file(3), acl_set_fd(3), acl(5)

AUTHOR

       Derived from the FreeBSD manual pages written by Robert N M Watson <rwatson@FreeBSD.org>, and adapted for
       Linux by Andreas Gruenbacher <andreas.gruenbacher@gmail.com>.

Linux ACL                                        March 23, 2002                                    ACL_GET_FD(3)