mirror of
https://github.com/uutils/coreutils
synced 2024-11-16 17:58:06 +00:00
268 lines
10 KiB
Rust
268 lines
10 KiB
Rust
#[link(name="du", vers="1.0.0", author="Derek Chiang")];
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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) Derek Chiang <derekchiang93@gmail.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;
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use std::io::fs;
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use std::io::FileStat;
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use std::option::Option;
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use std::path::Path;
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use extra::arc::Arc;
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use extra::future::Future;
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use extra::getopts::groups;
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static VERSION: &'static str = "1.0.0";
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struct Options {
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all: bool,
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max_depth: Option<uint>,
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total: bool,
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separate_dirs: bool,
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}
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fn du(path: &Path, options_arc: Arc<Options>, depth: uint) -> ~[Arc<FileStat>] {
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let mut stats = ~[];
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let mut futures = ~[];
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let options = options_arc.get();
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let mut my_stat = path.stat();
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for f in fs::readdir(path).move_iter() {
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match f.is_file() {
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true => {
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let stat = f.stat();
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my_stat.size += stat.size;
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my_stat.unstable.blocks += stat.unstable.blocks;
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if options.all {
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stats.push(Arc::new(stat))
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}
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}
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false => {
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let oa_clone = options_arc.clone();
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futures.push(do Future::spawn { du(&f, oa_clone, depth + 1) })
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}
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}
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}
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for future in futures.mut_iter() {
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for stat_arc in future.get().move_rev_iter() {
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let stat = stat_arc.get();
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if !options.separate_dirs && stat.path.dir_path() == my_stat.path {
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my_stat.size += stat.size;
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my_stat.unstable.blocks += stat.unstable.blocks;
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}
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if options.max_depth == None || depth < options.max_depth.unwrap() {
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stats.push(stat_arc.clone());
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}
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}
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}
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stats.push(Arc::new(my_stat));
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return stats;
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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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let opts = ~[
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// In task
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groups::optflag("a", "all", " write counts for all files, not just directories"),
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// In main
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groups::optflag("", "apparent-size", "print apparent sizes, rather than disk usage;
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although the apparent size is usually smaller, it may be larger due to holes
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in ('sparse') files, internal fragmentation, indirect blocks, and the like"),
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// // In main
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// groups::optopt("B", "block-size", "scale sizes by SIZE before printing them.
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// E.g., '-BM' prints sizes in units of 1,048,576 bytes. See SIZE format below.",
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// "SIZE"),
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// // In main
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// groups::optflag("b", "bytes", "equivalent to '--apparent-size --block-size=1'"),
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// In main
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groups::optflag("c", "total", "produce a grand total"),
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// In task
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// groups::optflag("D", "dereference-args", "dereference only symlinks that are listed
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// on the command line"),
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// In main
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// groups::optopt("", "files0-from", "summarize disk usage of the NUL-terminated file
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// names specified in file F;
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// If F is - then read names from standard input", "F"),
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// // In task
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// groups::optflag("H", "", "equivalent to --dereference-args (-D)"),
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// In main
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groups::optflag("h", "human-readable", "print sizes in human readable format (e.g., 1K 234M 2G)"),
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// In main
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groups::optflag("", "si", "like -h, but use powers of 1000 not 1024"),
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// In main
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groups::optflag("k", "", "like --block-size=1K"),
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// // In task
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// groups::optflag("l", "count-links", "count sizes many times if hard linked"),
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// // In main
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groups::optflag("m", "", "like --block-size=1M"),
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// // In task
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// groups::optflag("L", "dereference", "dereference all symbolic links"),
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// // In task
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// groups::optflag("P", "no-dereference", "don't follow any symbolic links (this is the default)"),
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// // In main
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groups::optflag("0", "null", "end each output line with 0 byte rather than newline"),
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// In main?
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groups::optflag("S", "separate-dirs", "do not include size of subdirectories"),
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// In main
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groups::optflag("s", "summarize", "display only a total for each argument"),
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// // In task
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// groups::optflag("x", "one-file-system", "skip directories on different file systems"),
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// // In task
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// groups::optopt("X", "exclude-from", "exclude files that match any pattern in FILE", "FILE"),
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// // In task
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// groups::optopt("", "exclude", "exclude files that match PATTERN", "PATTERN"),
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// // In main
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groups::optopt("d", "max-depth", "print the total for a directory (or file, with --all)
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only if it is N or fewer levels below the command
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line argument; --max-depth=0 is the same as --summarize", "N"),
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// // In main
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// groups::optflag("", "time", "show time of the last modification of any file in the
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// directory, or any of its subdirectories"),
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// // In main
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// groups::optopt("", "time", "show time as WORD instead of modification time:
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// atime, access, use, ctime or status", "WORD"),
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// // In main
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// groups::optopt("", "time-style", "show times using style STYLE:
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// full-iso, long-iso, iso, +FORMAT FORMAT is interpreted like 'date'", "STYLE"),
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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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"Invalid options\n{}", 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("du " + VERSION + " - estimate file space usage");
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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!(" {0:s} [OPTION]... --files0-from=F", program);
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println("");
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println(groups::usage("Summarize disk usage of each FILE, recursively for directories.", opts));
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println("Display values are in units of the first available SIZE from
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--block-size, and the DU_BLOCK_SIZE, BLOCK_SIZE and BLOCKSIZE environ‐
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ment variables. Otherwise, units default to 1024 bytes (or 512 if
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POSIXLY_CORRECT is set).
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SIZE is an integer and optional unit (example: 10M is 10*1024*1024).
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Units are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB, ... (pow‐
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ers of 1000).");
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return
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}
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let options = Options{
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all: matches.opt_present("all"),
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max_depth: match (matches.opt_present("summarize"), matches.opt_str("max-depth")) {
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(true, Some(s)) => match from_str::<uint>(s) {
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Some(_) => {
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println!("du: warning: summarizing conflicts with --max-depth={:s}", s);
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return
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},
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None => {
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println!("du: invalid maximum depth '{:s}'", s);
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return
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}
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},
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(true, None) => Some(0),
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(false, Some(s)) => match from_str::<uint>(s) {
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Some(u) => Some(u),
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None => {
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println!("du: invalid maximum depth '{:s}'", s);
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return
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}
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},
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(false, None) => None
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},
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total: matches.opt_present("total"),
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separate_dirs: matches.opt_present("S"),
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};
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let strs = matches.free.clone();
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let strs = match strs.is_empty() {
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true => ~[~"./"],
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false => strs
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};
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let options_arc = Arc::new(options);
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let MB = match matches.opt_present("si") {
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true => 1000 * 1000,
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false => 1024 * 1024,
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};
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let KB = match matches.opt_present("si") {
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true => 1000,
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false => 1024,
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};
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let convert_size = |size: u64| -> ~str {
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if matches.opt_present("human-readable") || matches.opt_present("si") {
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if size > MB {
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format!("{:.1f}MB", (size as f64) / (MB as f64))
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} else if size > KB {
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format!("{:.1f}KB", (size as f64) / (KB as f64))
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} else {
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format!("{}B", size)
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}
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} else if matches.opt_present("k") {
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format!("{}", ((size as f64) / (KB as f64)).ceil())
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} else if matches.opt_present("m") {
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format!("{}", ((size as f64) / (MB as f64)).ceil())
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} else {
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format!("{}", ((size as f64) / (KB as f64)).ceil())
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}
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};
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let line_separator = match matches.opt_present("0") {
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true => "\0",
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false => "\n",
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};
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let mut grand_total = 0;
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for path_str in strs.iter() {
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let path = Path::init(path_str.clone());
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let iter = du(&path, options_arc.clone(), 0).move_iter();
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let (_, len) = iter.size_hint();
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let len = len.unwrap();
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for (index, stat_arc) in iter.enumerate() {
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let stat = stat_arc.get();
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let size = match matches.opt_present("apparent-size") {
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true => stat.size,
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// C's stat is such that each block is assume to be 512 bytes
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// See: http://linux.die.net/man/2/stat
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false => stat.unstable.blocks * 512,
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};
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print!("{:<10} {}", convert_size(size), stat.path.display());
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print(line_separator);
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if options.total && index == (len - 1) {
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// The last element will be the total size of the the path under
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// path_str. We add it to the grand total.
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grand_total += size;
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}
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}
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}
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if options.total {
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print!("{:<10} total", convert_size(grand_total));
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print(line_separator);
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}
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}
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