Deprecate --version-control (-V) in comments.
(usage): Remove mention of --version-control.
(main): Make -V warn then fall through into --backup case.
[--backup case]: Handle optional arg.
(open_maybe_create): Remove.
(touch): Don't record whether the file was created; this isn't
possible to do reliably and portably without race conditions.
If the file was created and if amtime_now is nonzero, this
change means we'll have to do another utime system call, but
that's no more harmful than the previous version of this code.
Deprecate --version-control (-V) in comments.
(usage): Remove mention of --version-control.
(main): Make -V warn then fall through into --backup case.
[--backup case]: Handle optional arg.
(TARGET_DIRECTORY_OPTION): Define.
(SPARSE_OPTION): Define.
(usage): Describe it.
(do_copy): Change meanings/names of first two parameters: use `n_files'
in place of `argc - optind', and `file' instead of `argv + optind'.
Add parameter, target_directory.
(main): Pass new arg, target_directory.
Deprecate --version-control (-V) in comments.
(usage): Remove mention of --version-control.
(main): Make -V warn then fall through into --backup case.
[--backup case]: Handle optional arg.
(TARGET_DIRECTORY_OPTION): Define.
(usage): Describe it.
(main): Implement it.
Make code clearer: use new variable `n_files' in place of
`argc - optind'. Use `file' instead of `argv + optind'.
(usage): Describe it.
(main): Implement it.
Remove unused variable, stdin_tty.
Make code clearer: use new variable `n_files' in place of
`argc - optind'. Use `file' instead of `argv + optind'.
when possible. It is possible when using none of these options:
--count, -repeated, --all-repeated, --unique.
Based on a patch from Ian Turner.
(check_file): Move declarations of local variables into the scopes where used.
(min): Remove macro definition.
(different): Use MIN, not min.
(SWAP_LINES): New macro.
(check_file): Use it here.
Jim Meyering