116 lines
4.0 KiB
Rust
116 lines
4.0 KiB
Rust
use super::Cmd;
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use clap::{value_parser, Arg, ArgMatches, Command};
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use mode::{get_umask, Parser};
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use shitbox::args;
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use std::{convert::Infallible, error::Error, io, str::FromStr};
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#[derive(Debug, Default)]
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pub struct MkNod;
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impl Cmd for MkNod {
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fn cli(&self) -> clap::Command {
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Command::new("mknod")
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.about("make block or character special files")
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.author("Nathan Fisher")
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.version(env!("CARGO_PKG_VERSION"))
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.args([
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Arg::new("mode")
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.short('m')
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.long("mode")
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.help("set file permission bits to MODE, not a=rw - umask")
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.value_name("MODE")
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.num_args(1),
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args::verbose(),
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Arg::new("file").value_name("NAME").required(true),
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Arg::new("type")
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.value_name("TYPE")
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.required(true)
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.value_parser(["b", "c", "p"]),
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Arg::new("major")
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.value_name("MAJOR")
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.value_parser(value_parser!(u32))
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.required_if_eq_any([("type", "b"), ("type", "c")]),
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Arg::new("minor")
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.value_name("MINOR")
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.value_parser(value_parser!(u32))
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.required_if_eq_any([("type", "b"), ("type", "c")]),
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])
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}
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fn run(&self, matches: &ArgMatches) -> Result<(), Box<dyn Error>> {
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let Some(file) = matches.get_one::<String>("file") else {
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return Err(io::Error::new(io::ErrorKind::Other, "no file given").into());
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};
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let Some(t) = matches.get_one::<String>("type") else {
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return Err(io::Error::new(io::ErrorKind::Other, "no type given").into());
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};
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let mut mode = if let Some(m) = matches.get_one::<String>("mode") {
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Parser::default().parse(m.as_str())?
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} else {
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let mask = get_umask();
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0o666 & !mask
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};
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let special: Special = t.parse()?;
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mode |= special as u32;
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let dev_t = match special {
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Special::Block | Special::Char => {
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let Some(major) = matches.get_one::<u32>("major") else {
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return Err(io::Error::new(io::ErrorKind::Other, "missing MAJOR").into());
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};
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let Some(minor) = matches.get_one::<u32>("minor") else {
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return Err(io::Error::new(io::ErrorKind::Other, "missing MINOR").into());
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};
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libc::makedev(*major, *minor)
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}
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Special::Pipe => 0,
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};
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stat::mknod(file.as_str(), mode, dev_t)?;
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if matches.get_flag("verbose") {
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match special {
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Special::Block => {
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println!(
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"mknod: created block device with mode {mode:o} major {} and minor {}",
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unsafe { libc::major(dev_t) },
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unsafe { libc::minor(dev_t) },
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);
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}
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Special::Char => {
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println!(
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"mknod: created character device with mode {mode:o} major {} and minor {}",
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unsafe { libc::major(dev_t) },
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unsafe { libc::minor(dev_t) },
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);
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}
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Special::Pipe => {
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println!("mknod: created fifo with mode {mode:o}");
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}
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}
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}
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Ok(())
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}
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fn path(&self) -> Option<shitbox::Path> {
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Some(shitbox::Path::Sbin)
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}
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}
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#[derive(Clone, Copy, Debug)]
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enum Special {
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Block = 0o60000,
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Char = 0o20000,
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Pipe = 0o10000,
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}
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impl FromStr for Special {
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type Err = Infallible;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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Ok(match s {
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"b" => Self::Block,
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"c" => Self::Char,
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"p" => Self::Pipe,
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_ => unreachable!(),
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})
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}
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}
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