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99 lines
2.8 KiB
99 lines
2.8 KiB
use std::io::Result as IoResult;
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use std::process::Command;
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use std::process::Output;
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pub trait CommandRunner {
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fn run_with_args(&self, program: &str, args: &[&str]) -> IoResult<Output>;
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}
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#[derive(Debug)]
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pub struct StdCommandRunner;
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impl CommandRunner for StdCommandRunner {
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fn run_with_args(&self, program: &str, args: &[&str]) -> IoResult<Output> {
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// FIXME: logger
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println!("{} {:?}", program, args);
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let res = Command::new(program).args(args).output();
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println!("{:?}", res);
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res
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}
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}
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#[derive(Debug)]
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pub struct SetuidCommandRunner<'a, C> where C: 'a + CommandRunner {
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command_runner: &'a C,
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user_name: &'a str
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}
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impl<'a, C> SetuidCommandRunner<'a, C> where C: 'a + CommandRunner {
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pub fn new(user_name: &'a str, command_runner: &'a C) -> SetuidCommandRunner<'a, C> {
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SetuidCommandRunner {
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command_runner: command_runner,
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user_name: user_name
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}
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}
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}
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use std::os::unix::process::CommandExt;
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use std::env;
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use users::get_user_by_name;
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struct TempSetEnv<'a> { name: &'a str, old_value: Option<String> }
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impl<'a> TempSetEnv<'a> {
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fn new(name: &'a str, new_value: String) -> TempSetEnv<'a> {
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let old_value = env::var(name);
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env::set_var(name, new_value);
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TempSetEnv { name: name, old_value: old_value.ok() }
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}
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}
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impl<'a> Drop for TempSetEnv<'a> {
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fn drop(&mut self) {
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match self.old_value {
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Some(ref val) => env::set_var(self.name, val),
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None => env::remove_var(self.name)
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}
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}
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}
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impl<'a, C> CommandRunner for SetuidCommandRunner<'a, C> where C: 'a + CommandRunner {
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fn run_with_args(&self, program: &str, args: &[&str]) -> IoResult<Output> {
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let uid = get_user_by_name(self.user_name).unwrap().uid();
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let set_home = TempSetEnv::new("HOME", format!("/home/{}", self.user_name));
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let set_dbus = TempSetEnv::new("XDG_RUNTIME_DIR", format!("/run/user/{}", uid));
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println!("{} {:?}", program, args);
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let res = Command::new(program).uid(uid).gid(uid).args(args).output();
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println!("{:?}", res);
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res
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}
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}
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#[derive(Debug)]
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pub struct SuCommandRunner<'a, C> where C: 'a + CommandRunner {
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command_runner: &'a C,
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user_name: &'a str
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}
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impl<'a, C> SuCommandRunner<'a, C> where C: 'a + CommandRunner {
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pub fn new(user_name: &'a str, command_runner: &'a C) -> SuCommandRunner<'a, C> {
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SuCommandRunner {
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command_runner: command_runner,
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user_name: user_name
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}
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}
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}
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// Su doesn't set XDG_RUNTIME_DIR
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// https://github.com/systemd/systemd/blob/master/src/login/pam_systemd.c#L439
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impl<'a, C> CommandRunner for SuCommandRunner<'a, C> where C: 'a + CommandRunner {
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fn run_with_args(&self, program: &str, args: &[&str]) -> IoResult<Output> {
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let mut new_args = vec![self.user_name, "-s", "/usr/bin/env", "--", program];
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new_args.extend_from_slice(args);
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self.command_runner.run_with_args("su", &new_args)
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}
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}
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#[cfg(test)]
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mod test {
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}
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