force valid arguments

Cargo.lock

@@ -34,7 +34,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "crab"
-version = "0.0.3"
+version = "0.0.4"
 dependencies = [
  "exec",
  "nix",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "crab"
-version = "0.0.3"
+version = "0.0.4"
 edition = "2021"
 
 [dependencies]

deployments/aur/.SRCINFO

@@ -1,6 +1,6 @@
 pkgbase = crab
 	pkgdesc = A rusty permission authentication system
-	pkgver = 0.0.3
+	pkgver = 0.0.4
 	pkgrel = 1
 	url = https://g.tylerm.dev/tylermurphy534/crab.git
 	arch = x86_64

deployments/aur/PKGBUILD

@@ -5,7 +5,7 @@
 
 # Maintainer: Tyler Murphy <tylermurphy534@gmail.com>
 pkgname=crab
-pkgver=0.0.3
+pkgver=0.0.4
 pkgrel=1
 pkgdesc="A rusty permission authentication system"
 arch=('x86_64' 'i686')

src/flags.rs

@@ -5,7 +5,7 @@ pub struct Flags {
   pub arg_count: usize
 }
 
-pub fn parse(args: &[String]) -> Flags {
+pub fn parse(args: &[String]) -> Option<Flags> {
   let mut flags = Flags { 
     help: false, 
     version: false,
@@ -17,15 +17,21 @@ pub fn parse(args: &[String]) -> Flags {
     flags.arg_count += 1;
     if arg.starts_with("--") {
       let flag = &arg[2..];
-      check_flag(&flag, &mut flags);
+      if !set_flag(&flag, &mut flags) {
+        eprintln!("Invalid argument: {}", arg);
+        return None
+      }
     } else {
       let flag = &arg[1..];
       for char in flag.chars() {
-        check_flag(&char.to_string(), &mut flags);
+        if !set_flag(&char.to_string(), &mut flags) {
+            eprintln!("Invalid argument: {}", arg);
+            return None
         }
       }
     }
-  flags
+  }
+  Some(flags)
 }
 
 fn is_arg(arg: &str) -> bool {
@@ -36,16 +42,18 @@ const HELP_FLAG:              &str = "help h";
 const VERSION_FLAG:           &str = "version v";
 const DONT_PERSIST:           &str = "d";
 
-fn check_flag(arg: &str, flags: &mut Flags) {
+fn set_flag(arg: &str, flags: &mut Flags) -> bool {
   if has_flag_set(&arg, HELP_FLAG) {
-    flags.help = true
+    flags.help = true;
-  }
+    return true
-  if has_flag_set(&arg, VERSION_FLAG) {
+  } else if has_flag_set(&arg, VERSION_FLAG) {
-    flags.version = true
+    flags.version = true;
-  }
+    return true
-  if has_flag_set(&arg, DONT_PERSIST) {
+  } else if has_flag_set(&arg, DONT_PERSIST) {
-    flags.dont_persist = true
+    flags.dont_persist = true;
+    return true
   }
+  false
 }
 
 fn has_flag_set(arg: &str, check: &str) -> bool {

src/help.rs

@@ -2,7 +2,6 @@ pub fn help() {
   let help = 
 "Usage:
     crab [-d] command [args]
-
 Options:
     -v --version    Get the current version of the package
     -h --help       Generates the crab help message

src/main.rs

@@ -5,7 +5,7 @@ use nix::unistd;
 
 extern crate time;
 
-// const ERROR_COMMAND:           u8 = 1;
+const ERROR_ARGS:           u8 = 1;
 const ERROR_CONFIG:         u8 = 2;
 const ERROR_NO_USER:        u8 = 3;
 const ERROR_NOT_AUTHORIZED: u8 = 4;
@@ -18,7 +18,13 @@ mod help;
 
 fn main() -> ExitCode {
     let args: Vec<String> = env::args().collect();
-    let flags = flags::parse(&args[1..]);
+    let flags = match flags::parse(&args[1..]) {
+        Some(data) => data,
+        None => {
+            help::help();
+            return ExitCode::from(ERROR_ARGS);
+        }
+    };
     if flags.version {
         println!("crab version 0.0.3");
         return ExitCode::SUCCESS;

src/persist.rs

@@ -83,12 +83,13 @@ fn get_terminal_config() -> Option<Value> {
 }
 
 fn write_terminal_config(id: &i32, data: &str) -> Result<(), Box<dyn std::error::Error>> {
-  std::fs::write(path(&id), data)?;
+  std::fs::write(path(&id), "")?;
   unistd::chown(std::path::Path::new(&path(&id)), Some(unistd::Uid::from(0)), Some(unistd::Gid::from(0)))?;
   let metadata = std::fs::metadata(path(&id))?;
   let mut perms = metadata.permissions();
   perms.set_mode(0o660);
   fs::set_permissions(path(&id), perms)?;
+  std::fs::write(path(&id), data)?;
   Ok(())
 }