feat: adjust cat to be more busybox-like, add mkdir

coreutils/src/commands/cat.rs

@@ -10,11 +10,15 @@ impl Command for Cat {
     fn execute(&self) {
         let args: Vec<String> = env::args().collect::<Vec<_>>().clone();
         let arguments: Vec<String> = get_args(String::from("cat"), args);
-        let filename = &arguments[0];
-
-        let mut read = BufReader::new(File::open(filename).unwrap());
         let mut vecbuf = Vec::new();
-        let _ = read.read_to_end(&mut vecbuf);
+
+        for file in arguments.iter() {
+            let mut tmpbuf = Vec::new();
+            let mut read = BufReader::new(File::open(file).unwrap());
+            let _ = read.read_to_end(&mut tmpbuf);
+            let _ = vecbuf.append(&mut tmpbuf);
+        }
+
         let _ = io::stdout().write_all(&vecbuf);
     }
 }

coreutils/src/commands/mkdir.rs

@@ -0,0 +1,42 @@
+use boxutils::commands::Command;
+use boxutils::commands::get_args;
+use std::fs;
+use std::env;
+
+pub struct Mkdir;
+
+impl Command for Mkdir {
+    fn execute(&self) {
+        let args: Vec<String> = env::args().collect::<Vec<_>>().clone();
+        let arguments: Vec<String> = get_args(String::from("mkdir"), args.clone());
+
+        if arguments.len() == 0 {
+            panic!(
+                "{}",
+                String::from(
+                    "Usage: mkdir [DIR1] [DIR1] etc. pp. [-p, --parents]"
+                )
+            );
+        }
+        for arg in arguments.iter() {
+            if arg == "--help" {
+                println!(
+                    "{}",
+                    String::from(
+                        "Usage: mkdir [DIR1] [DIR2] etc. pp. [-p, --parents]"
+                ));
+                return;
+            }
+        }
+
+        for arg in arguments.iter() {
+            if (arg != "-p") & (arg != "--parent") {
+                if args.contains(&String::from("-p")) || args.contains(&String::from("--parent")) {
+                    let _ = fs::create_dir_all(String::from(arg));
+                } else {
+                    fs::create_dir(String::from(arg)).unwrap();
+                }
+            }
+        }
+    }
+}

coreutils/src/commands/mod.rs

@@ -5,4 +5,7 @@ mod cat;
 pub use cat::Cat;
 
 mod echo;
-pub use echo::Echo;
+pub use echo::Echo;
+
+mod mkdir;
+pub use mkdir::Mkdir;

src/registry.rs

@@ -7,6 +7,7 @@ pub fn get_registry() -> CommandRegistry {
     registry.register("hello", Box::new(coreutils::commands::Hello));
     registry.register("cat", Box::new(coreutils::commands::Cat));
     registry.register("echo", Box::new(coreutils::commands::Echo));
+    registry.register("mkdir", Box::new(coreutils::commands::Mkdir));
     registry.register("box", Box::new(Boxcmd));
 
     registry