Commit ec02a76f authored by Will Fancher's avatar Will Fancher
Browse files

chroot-realpath: init 

Now it's placed between initrd-switch-root.target and
initrd-switch-root.service, meaning it is truly the last thing to
happen before switch-root, as it should be.
parent 76612b17

pkgs/by-name/ch/chroot-realpath/package.nix

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{

  lib,

  rustPlatform,

}:



let

  cargo = lib.importTOML ./src/Cargo.toml;

in

rustPlatform.buildRustPackage {

  pname = cargo.package.name;

  version = cargo.package.version;



  src = ./src;



  cargoLock.lockFile = ./src/Cargo.lock;



  meta = {

    description = "Output a path's realpath within a chroot.";

    maintainers = [ lib.maintainers.elvishjerricco ];

  };

}

pkgs/by-name/ch/chroot-realpath/src/Cargo.lock

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# This file is automatically @generated by Cargo.

# It is not intended for manual editing.

version = 3



[[package]]

name = "chroot-realpath"

version = "0.1.0"

pkgs/by-name/ch/chroot-realpath/src/Cargo.toml

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[package]

name = "chroot-realpath"

version = "0.1.0"

edition = "2021"



[dependencies]



[profile.release]

opt-level = "z"

pkgs/by-name/ch/chroot-realpath/src/src/main.rs

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use std::env;

use std::io::{stdout, Error, ErrorKind, Write};

use std::os::unix::ffi::OsStrExt;

use std::os::unix::fs;



fn main() -> std::io::Result<()> {

    let args: Vec<String> = env::args().collect();



    if args.len() != 3 {

        return Err(Error::new(

            ErrorKind::InvalidInput,

            format!("Usage: {} <chroot> <path>", args[0]),

        ));

    }



    fs::chroot(&args[1])?;

    std::env::set_current_dir("/")?;



    let path = std::fs::canonicalize(&args[2])?;



    stdout().write_all(path.into_os_string().as_bytes())?;



    Ok(())

}