mirror of
https://github.com/uutils/coreutils
synced 2024-12-13 23:02:38 +00:00
242 lines
8.9 KiB
Rust
242 lines
8.9 KiB
Rust
#[crate_id(name="rm", vers="1.0.0", author="Arcterus")];
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/*
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* This file is part of the uutils coreutils package.
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*
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* (c) Arcterus <arcterus@mail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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extern mod extra;
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use std::os;
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use std::io::{print,stdin,stderr,stdio,fs,buffered,io_error};
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use extra::getopts::groups;
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enum InteractiveMode {
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InteractiveNone,
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InteractiveOnce,
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InteractiveAlways
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}
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impl Eq for InteractiveMode {
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fn eq(&self, other: &InteractiveMode) -> bool {
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match (*self, *other) {
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(InteractiveNone, InteractiveNone) |
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(InteractiveOnce, InteractiveOnce) |
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(InteractiveAlways, InteractiveAlways) => true,
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_ => false
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}
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}
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fn ne(&self, other: &InteractiveMode) -> bool {
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!self.eq(other)
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}
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}
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fn main() {
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let args = os::args();
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let program = args[0].clone();
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// TODO: make getopts support -R in addition to -r
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let opts = ~[
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groups::optflag("f", "force", "ignore nonexistent files and arguments, never prompt"),
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groups::optflag("i", "", "prompt before every removal"),
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groups::optflag("I", "", "prompt once before removing more than three files, or when removing recursively. Less intrusive than -i, while still giving some protection against most mistakes"),
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groups::optflagopt("", "interactive", "prompt according to WHEN: never, once (-I), or always (-i). Without WHEN, prompts always", "WHEN"),
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groups::optflag("", "one-file-system", "when removing a hierarchy recursively, skip any directory that is on a file system different from that of the corresponding command line argument (NOT IMPLEMENTED)"),
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groups::optflag("", "no-preserve-root", "do not treat '/' specially"),
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groups::optflag("", "preserve-root", "do not remove '/' (default)"),
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groups::optflag("r", "recursive", "remove directories and their contents recursively"),
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groups::optflag("d", "dir", "remove empty directories"),
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groups::optflag("v", "verbose", "explain what is being done"),
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groups::optflag("h", "help", "display this help and exit"),
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groups::optflag("V", "version", "output version information and exit")
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];
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let matches = match groups::getopts(args.tail(), opts) {
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Ok(m) => m,
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Err(f) => {
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writeln!(&mut stderr() as &mut Writer,
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"{}", f.to_err_msg());
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os::set_exit_status(1);
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return
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}
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};
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if matches.opt_present("help") {
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println!("rm 1.0.0");
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println!("");
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println!("Usage:");
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println!(" {0:s} [OPTION]... [FILE]...", program);
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println!("");
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print(groups::usage("Remove (unlink) the FILE(s).", opts));
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println!("");
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println!("By default, rm does not remove directories. Use the --recursive (-r)");
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println!("option to remove each listed directory, too, along with all of its contents");
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println!("");
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println!("To remove a file whose name starts with a '-', for example '-foo',");
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println!("use one of these commands:");
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println!("rm -- -foo");
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println!("");
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println!("rm ./-foo");
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println!("");
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println!("Note that if you use rm to remove a file, it might be possible to recover");
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println!("some of its contents, given sufficient expertise and/or time. For greater");
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println!("assurance that the contents are truly unrecoverable, consider using shred.");
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} else if matches.opt_present("version") {
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println!("rm 1.0.0");
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} else if matches.free.is_empty() {
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writeln!(&mut stderr() as &mut Writer, "Missing an argument");
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writeln!(&mut stderr() as &mut Writer,
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"For help, try '{0:s} --help'", program);
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os::set_exit_status(1);
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} else {
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let force = matches.opt_present("force");
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let interactive =
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if matches.opt_present("i") {
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InteractiveAlways
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} else if matches.opt_present("I") {
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InteractiveOnce
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} else if matches.opt_present("interactive") {
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match matches.opt_str("interactive").unwrap() {
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~"none" => InteractiveNone,
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~"once" => InteractiveOnce,
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~"always" => InteractiveAlways,
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val => {
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writeln!(&mut stderr() as &mut Writer,
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"Invalid argument to interactive ({})", val);
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os::set_exit_status(1);
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return
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}
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}
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} else {
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InteractiveNone
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};
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let one_fs = matches.opt_present("one-file-system");
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let preserve_root = !matches.opt_present("no-preserve-root");
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let recursive = matches.opt_present("recursive");
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let dir = matches.opt_present("dir");
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let verbose = matches.opt_present("verbose");
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if interactive == InteractiveOnce && (recursive || matches.free.len() > 3) {
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let msg =
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if recursive {
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"Remove all arguments recursively? "
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} else {
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"Remove all arguments? "
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};
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if !prompt(msg) {
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return;
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}
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}
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remove(matches.free, force, interactive, one_fs, preserve_root,
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recursive, dir, verbose);
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}
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}
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// TODO: implement one-file-system
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fn remove(files: &[~str], force: bool, interactive: InteractiveMode, one_fs: bool, preserve_root: bool, recursive: bool, dir: bool, verbose: bool) {
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for filename in files.iter() {
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let file = Path::new(filename.to_owned());
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if file.exists() {
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if file.is_dir() {
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if recursive && (*filename != ~"/" || !preserve_root) {
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remove(fs::walk_dir(&file).map(|x| x.as_str().unwrap().to_owned()).to_owned_vec(), force, interactive, one_fs, preserve_root, recursive, dir, verbose);
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remove_dir(&file, *filename, interactive, verbose);
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} else if dir && (*filename != ~"/" || !preserve_root) {
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remove_dir(&file, *filename, interactive, verbose);
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} else {
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if recursive {
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writeln!(&mut stderr() as &mut Writer,
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"Could not remove directory '{}'",
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*filename);
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} else {
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writeln!(&mut stderr() as &mut Writer,
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"Could not remove directory '{}' (did you mean to pass '-r'?)",
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*filename);
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}
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os::set_exit_status(1);
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}
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} else {
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remove_file(&file, *filename, interactive, verbose);
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}
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} else if !force {
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writeln!(&mut stderr() as &mut Writer,
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"No such file or directory '{}'", *filename);
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os::set_exit_status(1);
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}
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}
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}
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fn remove_dir(path: &Path, name: &str, interactive: InteractiveMode, verbose: bool) {
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let response =
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if interactive == InteractiveAlways {
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prompt_file(path, name)
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} else {
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true
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};
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if response {
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io_error::cond.trap(|_| {
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writeln!(&mut stderr() as &mut Writer,
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"Could not remove directory '{}'", name);
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os::set_exit_status(1);
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}).inside(|| {
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fs::rmdir(path);
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if verbose {
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println!("Removed '{}'", name);
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}
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});
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}
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}
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fn remove_file(path: &Path, name: &str, interactive: InteractiveMode, verbose: bool) {
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let response =
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if interactive == InteractiveAlways {
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prompt_file(path, name)
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} else {
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true
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};
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if response {
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io_error::cond.trap(|_| {
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writeln!(&mut stderr() as &mut Writer,
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"Could not remove file '{}'", name);
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os::set_exit_status(1);
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}).inside(|| {
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fs::unlink(path);
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if verbose {
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println!("Removed '{}'", name);
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}
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});
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}
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}
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fn prompt_file(path: &Path, name: &str) -> bool {
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if path.is_dir() {
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prompt(format!("Remove directory '{}'? ", name))
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} else {
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prompt(format!("Remove file '{}'? ", name))
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}
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}
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fn prompt(msg: &str) -> bool {
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print(msg);
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read_prompt()
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}
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fn read_prompt() -> bool {
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stdio::flush();
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match buffered::BufferedReader::new(stdin()).read_line() {
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Some(line) => {
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match line.char_at(0) {
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'y' | 'Y' => true,
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'n' | 'N' => false,
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_ => {
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print!("Please enter either Y or N: ");
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read_prompt()
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}
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}
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}
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None => true
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}
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}
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