fix: handle permission errors

Resolve #1

src/file.rs

@@ -12,6 +12,15 @@ pub fn handle_file_read_error(err: Error, file_path: &String) {
  exit(1);
 }
 
+pub fn handle_file_create_error(err: Error) {
+ match err.raw_os_error().unwrap() {
+ 5 => eprintln!("Error: Not enough permissions to write to file"),
+ 19 => eprintln!("Error: The file is in write-protected media"),
+ _ => eprintln!("Error: Can't write to file"),
+ }
+ exit(1);
+}
+
 pub fn handle_flipnote_id_error(err: FlipnoteDataError) {
  match err {
  FlipnoteDataError::InvalidSize => eprintln!("Error: Invalid file size"),

src/main.rs

@@ -1,7 +1,7 @@
 use clap::Parser;
 use cli::{Actions, Cli};
 
-use file::{handle_file_read_error, handle_flipnote_id_error};
+use file::{handle_file_create_error, handle_file_read_error, handle_flipnote_id_error};
 use flipnote_id::{compute_checksum, extract_id_with_checksum, set_fsid};
 
 use std::{
@@ -27,16 +27,18 @@ fn main() {
  }
  }
 
- let mut fp = File::create(&cli.file).unwrap();
- match fp.write_all(&new_data) {
- Ok(_) => println!(
- "Successfully set FSID to {:016X}",
- extract_id_with_checksum(&new_data).unwrap().id
- ),
- Err(_) => {
- eprintln!("Error: Can't write to file");
- exit(1);
- }
+ match File::create(&cli.file) {
+ Ok(mut fp) => match fp.write_all(&new_data) {
+ Ok(_) => println!(
+ "Successfully set FSID to {:016X}",
+ extract_id_with_checksum(&new_data).unwrap().id
+ ),
+ Err(_) => {
+ eprintln!("Error: Can't write to file");
+ exit(1);
+ }
+ },
+ Err(err) => handle_file_create_error(err),
  }
  }
  Err(_) => {