(du_files): Add prototype with ATTRIBUTE_NORETURN.
Exit from this function, not from...
(main): ...here.
Instead, if possible, invoke du_files through a macro that
runs it with a large, mmap'd stack.
Include "dirname.h", "ftw.h", and "quotearg.h".
(AUTHORS): Add self.
(opt_one_file_system): Move global into `main'.
(path, xstat, exit_status): Remove declarations.
(arg_length, suffix_length): New globals.
(G_fail): New global, sort of like the old `exit_status'.
(IS_FTW_DIR_TYPE): Define.
(print_only_size): New function.
(process_file): New function.
(str_init, ensure_space, str_copyc, str_concatc): Remove functions.
(str_trunc, pop_dir, count_entry): Likewise.
(du_files): Rewrite to use nftw.
Define to rpl_lstat, so that even on systems like Solaris 5.8,
du honors (per POSIX) the trailing slash on an argument referring
to a symlink-to-directory.
Rewrite so that `/' is no longer represented internally as
the empty string.
(count_entry): When appending a file name component,
account for the fact that the current path may end in `/'.
Franois Pinard reported that `du symlink-to-dir/' was not
equivalent to `du symlink-to-dir/.'. Now it is.
slightly-modified copies of those that used to be in cp-hash.c.
(struct entry) [coll_link]: Remove member.
(struct htab): Remove.
(hash_reset, hash_init, hash_insert2, hash_insert): Remove functions.
Include hash.h and same.h.
(htab): Change type of global to `struct hash';
(entry_hash, entry_compare, hash_ins): New functions.
(count_entry): Use hash_ins instead of hash_insert.
for that purpose instead.
(count_entry): Also save the directory if we're saving more
than one level.
Fix file descriptor and memory leak when chdir fails.
(count_entry): Factor out common code (pop_dir), and call the new
function instead.
Move declaration of global, `stat_buf' into this function.
(du_files): Don't stat `.' or call save_cwd, since count_entry
never returns with a changed working directory.
Include version-etc.h instead.
(PROGRAM_NAME, AUTHORS): Define.
[long_options]: Add entries for --help and --version.
Remove parse_long_options call.
(main) [getopt switch]: Add a case for each of --help and --version.
[long_options]: Remove the "help" and "version" entries.
(main): Use parse_long_options, including author name(s).
Remove the show_version and show_help blocks.
