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57 lines
1.8 KiB
57 lines
1.8 KiB
use std::borrow::{ Borrow, Cow };
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use std::error::Error;
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use std::fmt;
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use std::fs;
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use std::os::unix::fs::MetadataExt;
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use std::path::Path;
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use users::get_user_by_name;
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use command_runner::CommandRunner;
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use resources::Resource;
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use symbols::{Action, OwnedSymbolAction, Symbol, SymbolAction, SymbolRunner};
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pub struct Owner<'a, D> where D: AsRef<str> + fmt::Display {
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path: D,
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user_name: Cow<'a, str>,
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command_runner: &'a CommandRunner
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}
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impl<'a, D> Owner<'a, D> where D: AsRef<str> + fmt::Display {
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pub fn new(path: D, user_name: Cow<'a, str>, command_runner: &'a CommandRunner) -> Self {
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Owner { path: path, user_name: user_name, command_runner: command_runner }
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}
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}
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impl<'a, D> Symbol for Owner<'a, D> where D: AsRef<str> + fmt::Display {
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fn target_reached(&self) -> Result<bool, Box<Error>> {
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if !Path::new(self.path.as_ref()).exists() {
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return Ok(false);
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}
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let actual_uid = fs::metadata(self.path.as_ref()).unwrap().uid();
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let target_uid = get_user_by_name(self.user_name.borrow()).unwrap().uid();
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Ok(actual_uid == target_uid)
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}
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fn execute(&self) -> Result<(), Box<Error>> {
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self.command_runner.run_successfully("chown", &[self.user_name.borrow(), self.path.as_ref()])
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}
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fn get_prerequisites(&self) -> Vec<Resource> {
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vec![ Resource::new("user", self.user_name.to_string()) ]
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}
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fn as_action<'b>(&'b self, runner: &'b SymbolRunner) -> Box<Action + 'b> {
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Box::new(SymbolAction::new(runner, self))
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}
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fn into_action<'b>(self: Box<Self>, runner: &'b SymbolRunner) -> Box<Action + 'b> where Self: 'b {
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Box::new(OwnedSymbolAction::new(runner, *self))
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}
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}
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impl<'a, D> fmt::Display for Owner<'a, D> where D: AsRef<str> + fmt::Display {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error>{
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write!(f, "Owner {} for {}", self.user_name, self.path)
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}
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}
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