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// -*- coding: utf-8 -*-
//
// Copyright (C) 2024 Michael Büsch <m@bues.ch>
//
// Licensed under the Apache License version 2.0
// or the MIT license, at your option.
// SPDX-License-Identifier: Apache-2.0 OR MIT
use anyhow::{self as ah, format_err as err, Context as _};
use std::fs::read_to_string;
/// Resolve a user name into a UID.
pub fn os_get_uid(user_name: &str) -> ah::Result<u32> {
let data = read_to_string("/etc/passwd").context("Read /etc/passwd database")?;
for line in data.lines() {
let mut fields = line.splitn(7, ':');
let name = fields.next().context("Get passwd name")?;
if name == user_name {
let _pw = fields.next().context("Get passwd password")?;
let uid = fields.next().context("Get passwd uid")?;
return uid.parse().context("Parse passwd uid");
}
}
Err(err!("User '{user_name}' not found in /etc/passwd"))
}
/// Resolve a group name into a GID.
pub fn os_get_gid(group_name: &str) -> ah::Result<u32> {
let data = read_to_string("/etc/group").context("Read /etc/group database")?;
for line in data.lines() {
let mut fields = line.splitn(4, ':');
let name = fields.next().context("Get group name")?;
if name == group_name {
let _pw = fields.next().context("Get group password")?;
let gid = fields.next().context("Get group gid")?;
return gid.parse().context("Parse group gid");
}
}
Err(err!("Group '{group_name}' not found in /etc/group"))
}
// vim: ts=4 sw=4 expandtab
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