mirror of
https://github.com/uutils/coreutils
synced 2024-12-23 11:33:15 +00:00
352 lines
13 KiB
Rust
352 lines
13 KiB
Rust
#![crate_name = "uu_du"]
|
||
|
||
/*
|
||
* This file is part of the uutils coreutils package.
|
||
*
|
||
* (c) Derek Chiang <derekchiang93@gmail.com>
|
||
*
|
||
* For the full copyright and license information, please view the LICENSE
|
||
* file that was distributed with this source code.
|
||
*/
|
||
|
||
extern crate time;
|
||
|
||
#[macro_use]
|
||
extern crate uucore;
|
||
|
||
use std::fs;
|
||
use std::iter;
|
||
use std::io::{stderr, Write};
|
||
use std::os::unix::fs::MetadataExt;
|
||
use std::path::PathBuf;
|
||
use time::Timespec;
|
||
|
||
const NAME: &'static str = "du";
|
||
const SUMMARY: &'static str = "estimate file space usage";
|
||
const LONG_HELP: &'static str = "
|
||
Display values are in units of the first available SIZE from
|
||
--block-size, and the DU_BLOCK_SIZE, BLOCK_SIZE and BLOCKSIZE environ‐
|
||
ment variables. Otherwise, units default to 1024 bytes (or 512 if
|
||
POSIXLY_CORRECT is set).
|
||
|
||
SIZE is an integer and optional unit (example: 10M is 10*1024*1024).
|
||
Units are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB, ... (pow‐
|
||
ers of 1000).
|
||
";
|
||
|
||
struct Options {
|
||
all: bool,
|
||
program_name: String,
|
||
max_depth: Option<usize>,
|
||
total: bool,
|
||
separate_dirs: bool,
|
||
}
|
||
|
||
struct Stat {
|
||
path: PathBuf,
|
||
is_dir: bool,
|
||
size: u64,
|
||
blocks: u64,
|
||
nlink: u64,
|
||
created: u64,
|
||
accessed: u64,
|
||
modified: u64,
|
||
}
|
||
|
||
impl Stat {
|
||
fn new(path: PathBuf) -> Stat {
|
||
let metadata = safe_unwrap!(fs::symlink_metadata(&path));
|
||
Stat {
|
||
path: path,
|
||
is_dir: metadata.is_dir(),
|
||
size: metadata.len(),
|
||
blocks: metadata.blocks() as u64,
|
||
nlink: metadata.nlink() as u64,
|
||
created: metadata.mtime() as u64,
|
||
accessed: metadata.atime() as u64,
|
||
modified: metadata.mtime() as u64
|
||
}
|
||
}
|
||
}
|
||
|
||
// this takes `my_stat` to avoid having to stat files multiple times.
|
||
// XXX: this should use the impl Trait return type when it is stabilized
|
||
fn du(mut my_stat: Stat, options: &Options, depth: usize)
|
||
-> Box<DoubleEndedIterator<Item = Stat>>
|
||
{
|
||
let mut stats = vec!();
|
||
let mut futures = vec!();
|
||
|
||
if my_stat.is_dir {
|
||
let read = match fs::read_dir(&my_stat.path) {
|
||
Ok(read) => read,
|
||
Err(e) => {
|
||
safe_writeln!(stderr(), "{}: cannot read directory ‘{}‘: {}",
|
||
options.program_name, my_stat.path.display(), e);
|
||
return Box::new(iter::once(my_stat))
|
||
}
|
||
};
|
||
|
||
for f in read.into_iter() {
|
||
let entry = crash_if_err!(1, f);
|
||
let this_stat = Stat::new(entry.path());
|
||
if this_stat.is_dir {
|
||
futures.push(du(this_stat, options, depth + 1));
|
||
} else {
|
||
my_stat.size += this_stat.size;
|
||
my_stat.blocks += this_stat.blocks;
|
||
if options.all {
|
||
stats.push(this_stat);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
stats.extend(futures.into_iter().flat_map(|val| val).rev().filter_map(|stat| {
|
||
if !options.separate_dirs && stat.path.parent().unwrap() == my_stat.path {
|
||
my_stat.size += stat.size;
|
||
my_stat.blocks += stat.blocks;
|
||
}
|
||
if options.max_depth == None || depth < options.max_depth.unwrap() {
|
||
Some(stat)
|
||
} else {
|
||
None
|
||
}
|
||
}));
|
||
stats.push(my_stat);
|
||
Box::new(stats.into_iter())
|
||
}
|
||
|
||
pub fn uumain(args: Vec<String>) -> i32 {
|
||
let syntax = format!("[OPTION]... [FILE]...
|
||
{0} [OPTION]... --files0-from=F", NAME);
|
||
let matches = new_coreopts!(&syntax, SUMMARY, LONG_HELP)
|
||
// In task
|
||
.optflag("a", "all", " write counts for all files, not just directories")
|
||
// In main
|
||
.optflag("", "apparent-size", "print apparent sizes, rather than disk usage
|
||
although the apparent size is usually smaller, it may be larger due to holes
|
||
in ('sparse') files, internal fragmentation, indirect blocks, and the like")
|
||
// In main
|
||
.optopt("B", "block-size", "scale sizes by SIZE before printing them.
|
||
E.g., '-BM' prints sizes in units of 1,048,576 bytes. See SIZE format below.",
|
||
"SIZE")
|
||
// In main
|
||
.optflag("b", "bytes", "equivalent to '--apparent-size --block-size=1'")
|
||
// In main
|
||
.optflag("c", "total", "produce a grand total")
|
||
// In task
|
||
// opts.optflag("D", "dereference-args", "dereference only symlinks that are listed
|
||
// on the command line"),
|
||
// In main
|
||
// opts.optopt("", "files0-from", "summarize disk usage of the NUL-terminated file
|
||
// names specified in file F;
|
||
// If F is - then read names from standard input", "F"),
|
||
// // In task
|
||
// opts.optflag("H", "", "equivalent to --dereference-args (-D)"),
|
||
// In main
|
||
.optflag("h", "human-readable", "print sizes in human readable format (e.g., 1K 234M 2G)")
|
||
// In main
|
||
.optflag("", "si", "like -h, but use powers of 1000 not 1024")
|
||
// In main
|
||
.optflag("k", "", "like --block-size=1K")
|
||
// In task
|
||
.optflag("l", "count-links", "count sizes many times if hard linked")
|
||
// // In main
|
||
.optflag("m", "", "like --block-size=1M")
|
||
// // In task
|
||
// opts.optflag("L", "dereference", "dereference all symbolic links"),
|
||
// // In task
|
||
// opts.optflag("P", "no-dereference", "don't follow any symbolic links (this is the default)"),
|
||
// // In main
|
||
.optflag("0", "null", "end each output line with 0 byte rather than newline")
|
||
// In main
|
||
.optflag("S", "separate-dirs", "do not include size of subdirectories")
|
||
// In main
|
||
.optflag("s", "summarize", "display only a total for each argument")
|
||
// // In task
|
||
// opts.optflag("x", "one-file-system", "skip directories on different file systems"),
|
||
// // In task
|
||
// opts.optopt("X", "exclude-from", "exclude files that match any pattern in FILE", "FILE"),
|
||
// // In task
|
||
// opts.optopt("", "exclude", "exclude files that match PATTERN", "PATTERN"),
|
||
// In main
|
||
.optopt("d", "max-depth", "print the total for a directory (or file, with --all)
|
||
only if it is N or fewer levels below the command
|
||
line argument; --max-depth=0 is the same as --summarize", "N")
|
||
// In main
|
||
.optflagopt("", "time", "show time of the last modification of any file in the
|
||
directory, or any of its subdirectories. If WORD is given, show time as WORD instead of modification time:
|
||
atime, access, use, ctime or status", "WORD")
|
||
// In main
|
||
.optopt("", "time-style", "show times using style STYLE:
|
||
full-iso, long-iso, iso, +FORMAT FORMAT is interpreted like 'date'", "STYLE")
|
||
.parse(args);
|
||
|
||
let summarize = matches.opt_present("summarize");
|
||
|
||
let max_depth_str = matches.opt_str("max-depth");
|
||
let max_depth = max_depth_str.as_ref().and_then(|s| s.parse::<usize>().ok());
|
||
match (max_depth_str, max_depth) {
|
||
(Some(ref s), _) if summarize => {
|
||
show_error!("summarizing conflicts with --max-depth={}", *s);
|
||
return 1;
|
||
}
|
||
(Some(ref s), None) => {
|
||
show_error!("invalid maximum depth '{}'", *s);
|
||
return 1;
|
||
}
|
||
(Some(_), Some(_)) | (None, _) => { /* valid */ }
|
||
}
|
||
|
||
let options = Options {
|
||
all: matches.opt_present("all"),
|
||
program_name: NAME.to_owned(),
|
||
max_depth: max_depth,
|
||
total: matches.opt_present("total"),
|
||
separate_dirs: matches.opt_present("S"),
|
||
};
|
||
|
||
let strs = if matches.free.is_empty() {vec!("./".to_owned())} else {matches.free.clone()};
|
||
|
||
let mb = if matches.opt_present("si") {1000 * 1000} else {1024 * 1024};
|
||
let kb = if matches.opt_present("si") {1000} else {1024};
|
||
|
||
let block_size = match matches.opt_str("block-size") {
|
||
Some(s) => {
|
||
let mut found_number = false;
|
||
let mut found_letter = false;
|
||
let mut numbers = String::new();
|
||
let mut letters = String::new();
|
||
for c in s.chars() {
|
||
if found_letter && c.is_digit(10) || !found_number && !c.is_digit(10) {
|
||
show_error!("invalid --block-size argument '{}'", s);
|
||
return 1;
|
||
} else if c.is_digit(10) {
|
||
found_number = true;
|
||
numbers.push(c);
|
||
} else if c.is_alphabetic() {
|
||
found_letter = true;
|
||
letters.push(c);
|
||
}
|
||
}
|
||
let number = numbers.parse::<u64>().unwrap();
|
||
let multiple = match &letters[..] {
|
||
"K" => 1024u64.pow(1), "M" => 1024u64.pow(2),
|
||
"G" => 1024u64.pow(3), "T" => 1024u64.pow(4),
|
||
"P" => 1024u64.pow(5), "E" => 1024u64.pow(6),
|
||
"Z" => 1024u64.pow(7), "Y" => 1024u64.pow(8),
|
||
"KB" => 1000u64.pow(1), "MB" => 1000u64.pow(2),
|
||
"GB" => 1000u64.pow(3), "TB" => 1000u64.pow(4),
|
||
"PB" => 1000u64.pow(5), "EB" => 1000u64.pow(6),
|
||
"ZB" => 1000u64.pow(7), "YB" => 1000u64.pow(8),
|
||
_ => {
|
||
show_error!("invalid --block-size argument '{}'", s);
|
||
return 1;
|
||
}
|
||
};
|
||
number * multiple
|
||
},
|
||
None => 1024
|
||
};
|
||
|
||
let convert_size = |size: u64| -> String {
|
||
if matches.opt_present("human-readable") || matches.opt_present("si") {
|
||
if size >= mb {
|
||
format!("{:.1}M", (size as f64) / (mb as f64))
|
||
} else if size >= kb {
|
||
format!("{:.1}K", (size as f64) / (kb as f64))
|
||
} else {
|
||
format!("{}B", size)
|
||
}
|
||
} else if matches.opt_present("k") {
|
||
format!("{}", ((size as f64) / (kb as f64)).ceil())
|
||
} else if matches.opt_present("m") {
|
||
format!("{}", ((size as f64) / (mb as f64)).ceil())
|
||
} else {
|
||
format!("{}", ((size as f64) / (block_size as f64)).ceil())
|
||
}
|
||
};
|
||
|
||
let time_format_str = match matches.opt_str("time-style") {
|
||
Some(s) => {
|
||
match &s[..] {
|
||
"full-iso" => "%Y-%m-%d %H:%M:%S.%f %z",
|
||
"long-iso" => "%Y-%m-%d %H:%M",
|
||
"iso" => "%Y-%m-%d",
|
||
_ => {
|
||
show_error!("invalid argument '{}' for 'time style'
|
||
Valid arguments are:
|
||
- 'full-iso'
|
||
- 'long-iso'
|
||
- 'iso'
|
||
Try '{} --help' for more information.", s, NAME);
|
||
return 1;
|
||
}
|
||
}
|
||
},
|
||
None => "%Y-%m-%d %H:%M"
|
||
};
|
||
|
||
let line_separator = if matches.opt_present("0") {"\0"} else {"\n"};
|
||
|
||
let mut grand_total = 0;
|
||
for path_str in strs.into_iter() {
|
||
let path = PathBuf::from(path_str);
|
||
let iter = du(Stat::new(path), &options, 0).into_iter();
|
||
let (_, len) = iter.size_hint();
|
||
let len = len.unwrap();
|
||
for (index, stat) in iter.enumerate() {
|
||
let size = if matches.opt_present("apparent-size") {
|
||
stat.nlink * stat.size
|
||
} else {
|
||
// C's stat is such that each block is assume to be 512 bytes
|
||
// See: http://linux.die.net/man/2/stat
|
||
stat.blocks * 512
|
||
};
|
||
if matches.opt_present("time") {
|
||
let tm = {
|
||
let (secs, nsecs) = {
|
||
let time = match matches.opt_str("time") {
|
||
Some(s) => match &s[..] {
|
||
"accessed" => stat.accessed,
|
||
"created" => stat.created,
|
||
"modified" => stat.modified,
|
||
_ => {
|
||
show_error!("invalid argument 'modified' for '--time'
|
||
Valid arguments are:
|
||
- 'accessed', 'created', 'modified'
|
||
Try '{} --help' for more information.", NAME);
|
||
return 1;
|
||
}
|
||
},
|
||
None => stat.modified
|
||
};
|
||
((time / 1000) as i64, (time % 1000 * 1000000) as i32)
|
||
};
|
||
time::at(Timespec::new(secs, nsecs))
|
||
};
|
||
if !summarize || (summarize && index == len-1) {
|
||
let time_str = tm.strftime(time_format_str).unwrap();
|
||
print!("{}\t{}\t{}{}", convert_size(size), time_str, stat.path.display(), line_separator);
|
||
}
|
||
} else {
|
||
if !summarize || (summarize && index == len-1) {
|
||
print!("{}\t{}{}", convert_size(size), stat.path.display(), line_separator);
|
||
}
|
||
}
|
||
if options.total && index == (len - 1) {
|
||
// The last element will be the total size of the the path under
|
||
// path_str. We add it to the grand total.
|
||
grand_total += size;
|
||
}
|
||
}
|
||
}
|
||
|
||
if options.total {
|
||
print!("{}\ttotal", convert_size(grand_total));
|
||
print!("{}", line_separator);
|
||
}
|
||
|
||
0
|
||
}
|