NAME

       acl_get_file — get an ACL by filename

LIBRARY

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

SYNOPSIS

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

       acl_t
       acl_get_file(const char *path_p, acl_type_t type);

DESCRIPTION

       The  acl_get_file() function retrieves the access ACL associated with a file or directory, or the default
       ACL associated with a directory. The pathname for the file or directory is pointed  to  by  the  argument
       path_p.  The ACL is placed into working storage and acl_get_file() 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.

       The  value  of the argument type is used to indicate whether the access ACL or the default ACL associated
       with path_p is returned. If type is ACL_TYPE_ACCESS, the access ACL of path_p is  returned.  If  type  is
       ACL_TYPE_DEFAULT,  the  default ACL of path_p is returned. If type is ACL_TYPE_DEFAULT and no default ACL
       is associated with the directory path_p, then an ACL containing zero ACL entries  is  returned.  If  type
       specifies a type of ACL that cannot be associated with path_p, then the function fails.

       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_file() as
       an argument.

RETURN VALUE

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

ERRORS

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

       [EACCES]           Search permission is denied for a component of the path prefix or  the  object  exists
                          and the process does not have appropriate access rights.

                          Argument type specifies a type of ACL that cannot be associated with path_p.

       [EINVAL]           The argument type is not ACL_TYPE_ACCESS or ACL_TYPE_DEFAULT.

       [ENAMETOOLONG]     The length of the argument path_p is too long.

       [ENOENT]           The named object does not exist or the argument path_p points to an empty string.

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

       [ENOTDIR]          A component of the path prefix is not a directory.

       [ENOTSUP]          The file system on which the file identified by path_p 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_fd(3), acl_set_file(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_FILE(3)