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https://github.com/uutils/coreutils
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Add simple rm implementation
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2 changed files with 148 additions and 0 deletions
1
Makefile
1
Makefile
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@ -15,6 +15,7 @@ EXES := \
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false \
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printenv \
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pwd \
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rm \
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true \
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wc \
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whoami \
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147
rm/rm.rs
Normal file
147
rm/rm.rs
Normal file
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@ -0,0 +1,147 @@
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#[link(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::{stderr,fs,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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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"),
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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("", "help", "display this help and exit"),
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groups::optflag("", "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 {
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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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remove_files(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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fn remove_files(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_files(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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io_error::cond.trap(|_| {
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writeln!(&mut stderr() as &mut Writer,
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"Could not remove directory: '{}'", *filename);
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}).inside(|| {
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fs::rmdir(&file);
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});
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} else if dir {
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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 '{}'", *filename);
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}).inside(|| {
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fs::rmdir(&file);
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});
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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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} else {
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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: '{}'", *filename);
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os::set_exit_status(1);
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}).inside(|| {
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fs::unlink(&file);
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});
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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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"Invalid file: '{}'", *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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