user-supplied callback, once for the current directory before calling
ftw_dir, in case that part of the hierarchy should be pruned.
`func' does that by setting `data->skip'.
(PATH_MAX): Define to 1024, if not already defined.
(process_entry): Allocate enough space to hold the resulting
file name. Don't presume that 2*dirbufsize is enough.
(ftw_startup): Always use PATH_MAX to compute buffer size, now that
it is guaranteed to be defined.
the user-supplied callback, once before any of its entries,
in case that part of the hierarchy should be pruned. `func'
does that by setting `data->skip'.
related definitions and includes. Use NAMELEN throughout,
rather than _D_EXACT_NAMLEN.
[_LIBC]: Define NAMELEN to _D_EXACT_NAMLEN.
(stpcpy): Declare, if necessary.
(mempcpy): Define, if necessary.
[!_LIBC] (__stpcpy, __mempcpy): Define.
[!_LIBC] (LXSTAT, XSTAT): Define.
