Add struct TaskConfig

src/main.rs

@@ -5,7 +5,8 @@ use crate::task::*;
 use std::ffi::CString;
 
 fn main() {
-    let wm_task = WMTask::start().unwrap();
+    let wm_task_config = TaskConfig::new("polytreewm");
+    let wm_task = WMTask::start(wm_task_config).unwrap();
     unsafe { libc::exit(wm_task.wait().status()) }
 }
 
@@ -14,7 +15,7 @@ struct WMTask {
 }
 
 impl Task for WMTask {
-    fn start() -> Result<Self, String> {
+    fn start(config: TaskConfig) -> Result<Self, String> {
         unsafe {
             let pid = libc::fork();
 
@@ -23,7 +24,7 @@ impl Task for WMTask {
             }
 
             if pid == 0 {
-                let arg0 = CString::new(b"polytreewm" as &[u8]).unwrap();
+                let arg0 = CString::new(config.exe().as_bytes()).unwrap();
                 let args = vec![arg0.as_ptr(), std::ptr::null()];
                 libc::execvp(arg0.as_ptr(), args.as_ptr());
                 libc::exit(libc::EXIT_FAILURE);

src/task.rs

@@ -1,12 +1,26 @@
 pub trait Task: Sized {
-    fn start() -> Result<Self, String>;
+    fn start(config: TaskConfig) -> Result<Self, String>;
     fn wait(self) -> TaskResult;
 }
 
+pub struct TaskConfig {
+    exe: String,
+}
+
 pub struct TaskResult {
     status: i32,
 }
 
+impl TaskConfig {
+    pub fn new<Exe: Into<String>>(exe: Exe) -> Self {
+        Self { exe: exe.into() }
+    }
+
+    pub fn exe(&self) -> &String {
+        &self.exe
+    }
+}
+
 impl TaskResult {
     pub fn new(status: i32) -> Self {
         Self { status }