From 7b54240848668ec6523bc555c20a2499741da3b7 Mon Sep 17 00:00:00 2001
From: Takashi Kobayashi <7821157+t-koba@users.noreply.github.com>
Date: Sun, 17 Dec 2023 15:55:23 +0900
Subject: [PATCH] macOS support by removing system dependencies

---
 src/elements/command/simple.rs |  4 ++--
 src/main.rs                    | 25 +++++++++++--------------
 2 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/src/elements/command/simple.rs b/src/elements/command/simple.rs
index 766cb6aa..162c516e 100644
--- a/src/elements/command/simple.rs
+++ b/src/elements/command/simple.rs
@@ -3,7 +3,7 @@
 
 use std::env;
 
-use nix::unistd::{execvpe, fork, ForkResult, Pid}; 
+use nix::unistd::{execve, fork, ForkResult, Pid}; 
 use nix::unistd;
 use std::ffi::CString;
 use std::process::exit;
@@ -222,7 +222,7 @@ impl SimpleCommand {
             .map(|a| CString::new(a.to_string()).unwrap())
             .collect();
 
-        let _ = execvpe(&cargs[0], &cargs, &envs);
+        let _ = execve(&cargs[0], &cargs, &envs);
 
         eprintln!("Command not found: {:?}", &cargs[0]);
         exit(127);
diff --git a/src/main.rs b/src/main.rs
index f959f31b..e6c1a5dc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,10 +12,11 @@ mod utils;
 mod feeder;
 mod debuginfo;
 
-use std::{env, process, path};
-use std::os::linux::fs::MetadataExt;
+use std::{env, process};
 use std::fs::{File,OpenOptions};
-use std::io::Read;
+use nix::libc;
+use nix::unistd::isatty;
+use nix::sys::utsname::uname;
 
 use crate::core::ShellCore;
 use crate::core::proc;
@@ -26,10 +27,9 @@ use crate::elements::script::Script;
 use crate::file_descs::FileDescs;
 use std::os::unix::io::IntoRawFd;
 
-fn is_interactive(pid: u32) -> bool {
-    let std_path = format!("/proc/{}/fd/0", pid);
-    match path::Path::new(&std_path).metadata() {
-        Ok(metadata) => metadata.st_mode() == 8592, 
+fn is_interactive() -> bool {
+    match isatty(libc::STDIN_FILENO) {
+        Ok(atty) => atty,
         Err(err) => panic!("{}", err),
     }
 }
@@ -44,12 +44,9 @@ fn read_bashrc(core: &mut ShellCore){
 }
 
 fn get_hostname() -> String{
-    if let Ok(mut file) = File::open("/etc/hostname") {
-
-        let mut fullname = String::new();
-        if let Ok(_) = file.read_to_string(&mut fullname) {
-            return fullname.trim_end().to_string();
-        }
+    if let Ok(uts) = uname() {
+        let fullname = uts.nodename().to_string_lossy();
+        return fullname.to_string();
     }
 
     "unknown".to_string()
@@ -121,7 +118,7 @@ fn main() {
     core.set_var("HOSTNAME", &get_hostname());
     core.set_var("SHELL", "rustybash");
     core.set_var("BASH", &core.args[0].to_string());
-    if is_interactive(pid) {
+    if is_interactive() {
         core.flags += "i";
     }