50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
use ansi_term::{Color, Style};
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use std::env;
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use std::process::Command;
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use super::{Context, Module};
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/// Creates a module with the current user's username
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///
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/// Will display the usename if any of the following criteria are met:
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/// - The current user isn't the same as the one that is logged in ($LOGNAME != $USER)
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/// - The current user is root (UID = 0)
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/// - The user is currently connected as an SSH session ($SSH_CONNECTION)
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pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
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let user = env::var("USER").ok();
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let logname = env::var("LOGNAME").ok();
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let ssh_connection = env::var("SSH_CONNECTION").ok();
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let mut module_color = Color::Yellow.bold();
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if user != logname || ssh_connection.is_some() || is_root(&mut module_color) {
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let mut module = context.new_module("username")?;
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module.set_style(module_color);
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module.new_segment("username", &user?);
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return Some(module);
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}
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None
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}
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fn get_uid() -> Option<u32> {
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match Command::new("id").arg("-u").output() {
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Ok(output) => String::from_utf8(output.stdout)
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.map(|uid| uid.trim().parse::<u32>().ok())
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.ok()?,
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Err(_) => None,
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}
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}
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fn is_root(style: &mut Style) -> bool {
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match get_uid() {
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Some(uid) if uid == 0 => {
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style.clone_from(&Color::Red.bold());
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true
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}
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_ => false,
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}
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}
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