mirror of
https://github.com/uutils/coreutils
synced 2024-11-16 17:58:06 +00:00
371 lines
14 KiB
Rust
371 lines
14 KiB
Rust
#![crate_id(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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#![allow(uppercase_variables)]
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#![feature(macro_rules)]
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extern crate getopts;
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extern crate libc;
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extern crate time;
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use std::os;
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use std::io::{stderr, fs, FileStat, TypeDirectory};
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use std::option::Option;
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use std::path::Path;
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use std::sync::{Arc, Future};
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use time::Timespec;
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#[path = "../common/util.rs"]
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mod util;
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static NAME: &'static str = "du";
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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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program_name: String,
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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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struct Stat {
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path: Path,
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fstat: FileStat,
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}
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// this takes `my_stat` to avoid having to stat files multiple times.
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fn du(path: &Path, mut my_stat: Stat,
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options: Arc<Options>, depth: uint) -> Vec<Arc<Stat>> {
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let mut stats = vec!();
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let mut futures = vec!();
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if my_stat.fstat.kind == TypeDirectory {
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let read = match fs::readdir(path) {
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Ok(read) => read,
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Err(e) => {
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safe_writeln!(&mut stderr(), "{}: cannot read directory ‘{}‘: {}",
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options.program_name, path.display(), e);
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return vec!(Arc::new(my_stat))
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}
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};
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for f in read.move_iter() {
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let this_stat = Stat{path: f.clone(), fstat: safe_unwrap!(fs::lstat(&f))};
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if this_stat.fstat.kind == TypeDirectory {
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let oa_clone = options.clone();
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futures.push(Future::spawn(proc() { du(&f, this_stat, oa_clone, depth + 1) }))
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} else {
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my_stat.fstat.size += this_stat.fstat.size;
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my_stat.fstat.unstable.blocks += this_stat.fstat.unstable.blocks;
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if options.all {
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stats.push(Arc::new(this_stat))
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}
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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 in future.get().move_iter().rev() {
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if !options.separate_dirs && stat.path.dir_path() == my_stat.path {
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my_stat.fstat.size += stat.fstat.size;
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my_stat.fstat.unstable.blocks += stat.fstat.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.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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stats
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}
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#[allow(dead_code)]
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fn main() { os::set_exit_status(uumain(os::args())); }
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pub fn uumain(args: Vec<String>) -> int {
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let program = args.get(0).as_slice();
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let opts = [
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// In task
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getopts::optflag("a", "all", " write counts for all files, not just directories"),
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// In main
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getopts::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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getopts::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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getopts::optflag("b", "bytes", "equivalent to '--apparent-size --block-size=1'"),
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// In main
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getopts::optflag("c", "total", "produce a grand total"),
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// In task
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// getopts::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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// getopts::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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// getopts::optflag("H", "", "equivalent to --dereference-args (-D)"),
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// In main
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getopts::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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getopts::optflag("", "si", "like -h, but use powers of 1000 not 1024"),
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// In main
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getopts::optflag("k", "", "like --block-size=1K"),
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// In task
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getopts::optflag("l", "count-links", "count sizes many times if hard linked"),
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// // In main
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getopts::optflag("m", "", "like --block-size=1M"),
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// // In task
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// getopts::optflag("L", "dereference", "dereference all symbolic links"),
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// // In task
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// getopts::optflag("P", "no-dereference", "don't follow any symbolic links (this is the default)"),
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// // In main
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getopts::optflag("0", "null", "end each output line with 0 byte rather than newline"),
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// In main
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getopts::optflag("S", "separate-dirs", "do not include size of subdirectories"),
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// In main
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getopts::optflag("s", "summarize", "display only a total for each argument"),
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// // In task
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// getopts::optflag("x", "one-file-system", "skip directories on different file systems"),
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// // In task
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// getopts::optopt("X", "exclude-from", "exclude files that match any pattern in FILE", "FILE"),
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// // In task
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// getopts::optopt("", "exclude", "exclude files that match PATTERN", "PATTERN"),
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// In main
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getopts::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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getopts::optflagopt("", "time", "show time of the last modification of any file in the
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directory, or any of its subdirectories. If WORD is given, 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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getopts::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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getopts::optflag("", "help", "display this help and exit"),
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getopts::optflag("V", "version", "output version information and exit"),
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];
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let matches = match getopts::getopts(args.tail(), opts) {
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Ok(m) => m,
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Err(f) => {
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show_error!("Invalid options\n{}", f.to_err_msg());
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return 1;
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}
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};
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if matches.opt_present("help") {
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println!("{program} {version} - estimate file space usage
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Usage
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{program} [OPTION]... [FILE]...
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{program} [OPTION]... --files0-from=F
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{usage}
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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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program = program,
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version = VERSION,
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usage = getopts::usage("Summarize disk usage of each FILE, recursively for directories.", opts));
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return 0;
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} else if matches.opt_present("version") {
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println!("{} version: {}", program, VERSION);
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return 0;
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}
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let summarize = matches.opt_present("summarize");
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let max_depth_str = matches.opt_str("max-depth");
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let max_depth = max_depth_str.as_ref().and_then(|s| from_str::<uint>(s.as_slice()));
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match (max_depth_str, max_depth) {
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(Some(ref s), _) if summarize => {
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println!("{}: warning: summarizing conflicts with --max-depth={:s}", program, *s);
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return 0;
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}
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(Some(ref s), None) => {
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println!("{}: invalid maximum depth '{:s}'", program, *s);
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return 0;
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}
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(Some(_), Some(_)) | (None, _) => { /* valid */ }
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}
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let options = Options {
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all: matches.opt_present("all"),
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program_name: program.to_string(),
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max_depth: max_depth,
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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 = if matches.free.is_empty() {vec!("./".to_string())} else {matches.free.clone()};
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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 block_size = match matches.opt_str("block-size") {
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Some(s) => {
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let mut found_number = false;
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let mut found_letter = false;
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let mut numbers = vec!();
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let mut letters = vec!();
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for c in s.as_slice().chars() {
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if found_letter && c.is_digit() || !found_number && !c.is_digit() {
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println!("{}: invalid --block-size argument '{}'", program, s);
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return 0;
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} else if c.is_digit() {
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found_number = true;
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numbers.push(c as u8);
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} else if c.is_alphabetic() {
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found_letter = true;
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letters.push(c);
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}
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}
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let number = std::uint::parse_bytes(numbers.as_slice(), 10).unwrap();
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let multiple = match std::str::from_chars(letters.as_slice()).as_slice() {
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"K" => 1024, "M" => 1024 * 1024, "G" => 1024 * 1024 * 1024,
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"T" => 1024 * 1024 * 1024 * 1024, "P" => 1024 * 1024 * 1024 * 1024 * 1024,
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"E" => 1024 * 1024 * 1024 * 1024 * 1024 * 1024,
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"Z" => 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024,
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"Y" => 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024,
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"KB" => 1000, "MB" => 1000 * 1000, "GB" => 1000 * 1000 * 1000,
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"TB" => 1000 * 1000 * 1000 * 1000, "PB" => 1000 * 1000 * 1000 * 1000 * 1000,
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"EB" => 1000 * 1000 * 1000 * 1000 * 1000 * 1000,
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"ZB" => 1000 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000,
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"YB" => 1000 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000 * 1000,
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_ => {
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println!("{}: invalid --block-size argument '{}'", program, s); return 0;
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}
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};
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number * multiple
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},
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None => 1024
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};
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let convert_size = |size: u64| -> String {
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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}M", (size as f64) / (MB as f64))
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} else if size > KB {
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format!("{:.1f}K", (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) / (block_size as f64)).ceil())
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}
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};
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let time_format_str = match matches.opt_str("time-style") {
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Some(s) => {
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match s.as_slice() {
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"full-iso" => "%Y-%m-%d %H:%M:%S.%f %z",
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"long-iso" => "%Y-%m-%d %H:%M",
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"iso" => "%Y-%m-%d",
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_ => {
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println!("{program}: invalid argument '{}' for 'time style'
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Valid arguments are:
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- 'full-iso'
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- 'long-iso'
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- 'iso'
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Try '{program} --help' for more information.", s, program = program);
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return 0;
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}
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}
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},
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None => "%Y-%m-%d %H:%M"
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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.move_iter() {
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let path = Path::new(path_str);
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let stat = safe_unwrap!(fs::lstat(&path));
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let iter = du(&path, Stat{path: path.clone(), fstat: stat}, 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) in iter.enumerate() {
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let size = match matches.opt_present("apparent-size") {
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true => stat.fstat.unstable.nlink * stat.fstat.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.fstat.unstable.blocks * 512,
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};
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if matches.opt_present("time") {
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let time_str = {
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let (secs, nsecs) = {
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let time = match matches.opt_str("time") {
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Some(s) => match s.as_slice() {
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"accessed" => stat.fstat.accessed,
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"created" => stat.fstat.created,
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"modified" => stat.fstat.modified,
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_ => {
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println!("{program}: invalid argument 'modified' for '--time'
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Valid arguments are:
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- 'accessed', 'created', 'modified'
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Try '{program} --help' for more information.", program = program);
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return 0;
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}
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},
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None => stat.fstat.modified
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};
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((time / 1000) as i64, (time % 1000 * 1000000) as i32)
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};
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let time_spec = Timespec::new(secs, nsecs);
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time::at(time_spec).strftime(time_format_str)
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};
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print!("{:<10} {:<30} {}", convert_size(size), time_str, stat.path.display());
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} else {
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print!("{:<10} {}", convert_size(size), stat.path.display());
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}
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print!("{}", line_separator);
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if options_arc.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_arc.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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0
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}
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