From b1e25166433ce93403324a96f129712e4fac944d Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Sun, 11 Oct 2020 18:37:39 +0300
Subject: Properly read username and hostname

username is read by using libc::getuid, and checking /etc/passwd for the
uid and getting the username from there

hostname is read from /proc/sys/kernel/hostname
---
 src/prompt.rs | 49 ++++++++++++++++++++-----------------------------
 1 file changed, 20 insertions(+), 29 deletions(-)

(limited to 'src/prompt.rs')

diff --git a/src/prompt.rs b/src/prompt.rs
index e6600b7..40c96cc 100644
--- a/src/prompt.rs
+++ b/src/prompt.rs
@@ -1,42 +1,33 @@
 use std::io::Write;
 
+#[path = "user.rs"]
+mod user;
+
 pub struct Prompt {
     ps1: std::string::String,
     pub home: std::path::PathBuf,
 }
 
 impl Prompt {
-    pub fn new() -> Prompt {
-        let username = match std::process::Command::new("whoami").output() {
-            Ok(s) => {
-                let output = std::string::String::from_utf8(s.stdout).unwrap();
-                output.trim().to_string()
-            }
-            Err(e) => panic!(e),
-        };
-        let hostname = match std::process::Command::new("hostname").output() {
-            Ok(s) => {
-                let output = std::string::String::from_utf8(s.stdout).unwrap();
-                output.trim().to_string()
-            }
-            Err(e) => panic!(e),
-        };
-        let ready = if username == "root" {
-            "#"
-        } else {
-            "$"
-        }.to_owned();
-
-        let ps1 = String::from("  {USER}@{HOST} [{PWD}]\n\\$ ")
-            .replace("{USER}", &username)
-            .replace("{HOST}", &hostname)
-            .replace("\\$", &ready);
-        let home = match std::env::home_dir() {
-            Some(p) => p,
-            None => std::path::Path::new("/").to_path_buf(),
+    pub fn new() -> Result<Prompt, std::io::Error> {
+        let username = user::username()?;
+        let hostname = user::hostname()?;
+        let ready = if username == "root" { "#" } else { "$" }.to_owned();
+
+        let ps1 = match std::env::var("PS1") {
+            Ok(val) => val,
+            Err(_) => String::from("  {USER}@{HOST} [{PWD}]\n{$} "),
+        }
+        .replace("{USER}", &username)
+        .replace("{HOST}", &hostname)
+        .replace("{$}", &ready);
+
+        let home = match std::env::var("HOME") {
+            Ok(val) => std::path::Path::new(&val).to_path_buf(),
+            Err(_) => std::path::Path::new("/").to_path_buf(),
         };
 
-        Prompt { ps1, home }
+        Ok(Prompt { ps1, home })
     }
 
     pub fn print(&self, pwd: &std::path::PathBuf) {
-- 
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