Jeremy Soller
69 lines
1.9 KiB
Rust
69 lines
1.9 KiB
Rust
extern crate syscall;
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extern crate userutils;
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use std::env;
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use std::fs::File;
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use std::io::Read;
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use std::os::unix::process::CommandExt;
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use std::process::{self, Command};
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use userutils::{Passwd, Group};
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pub fn main() {
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let mut args = env::args().skip(1);
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let cmd = args.next().expect("sudo: no command provided");
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let uid = syscall::getuid().unwrap() as u32;
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if uid != 0 {
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let mut passwd_string = String::new();
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File::open("/etc/passwd").unwrap().read_to_string(&mut passwd_string).unwrap();
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let mut passwd_option = None;
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for line in passwd_string.lines() {
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if let Ok(passwd) = Passwd::parse(line) {
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if uid == passwd.uid {
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passwd_option = Some(passwd);
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break;
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}
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}
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}
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let passwd = passwd_option.expect("sudo: user not found in passwd");
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let mut group_string = String::new();
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File::open("/etc/group").unwrap().read_to_string(&mut group_string).unwrap();
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let mut group_option = None;
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for line in group_string.lines() {
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if let Ok(group) = Group::parse(line) {
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if group.group == "sudo" && group.users.split(',').any(|name| name == passwd.user) {
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group_option = Some(group);
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break;
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}
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}
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}
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if group_option.is_none() {
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panic!("sudo: '{}' not in sudo group", passwd.user);
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}
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}
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let mut command = Command::new(&cmd);
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for arg in args {
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command.arg(&arg);
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}
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command.uid(0);
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command.gid(0);
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command.env("USER", "root");
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match command.spawn() {
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Ok(mut child) => match child.wait() {
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Ok(status) => process::exit(status.code().unwrap_or(0)),
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Err(err) => panic!("sudo: failed to wait for {}: {}", cmd, err)
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},
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Err(err) => panic!("sudo: failed to execute {}: {}", cmd, err)
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}
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}
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