added fat-mount

Cargo.lock

@@ -150,10 +150,6 @@ dependencies = [
  "thiserror",
 ]
 
-[[package]]
-name = "fat-mount"
-version = "0.1.0"
-
 [[package]]
 name = "fuser"
 version = "0.15.1"

fat-bits/src/dir.rs

@@ -65,6 +65,7 @@ pub struct DirEntry {
 
     file_size: u32,
 
+    checksum: u8,
     long_name: Option<CompactString>,
 }
 
@@ -90,7 +91,7 @@ impl Display for DirEntry {
 }
 
 impl DirEntry {
-    fn load_name(bytes: [u8; 13], attr: &Attr) -> [u8; 13] {
+    fn load_name(bytes: [u8; 11], attr: &Attr) -> [u8; 13] {
         let mut name = [0; 13];
 
         let mut iter = name.iter_mut();
@@ -194,6 +195,7 @@ impl DirEntry {
             write_date,
             file_size,
             long_name: None,
+            checksum: Self::checksum(&bytes[..11]),
         })
     }
 
@@ -334,10 +336,10 @@ impl DirEntry {
         self.file_size
     }
 
-    pub fn checksum(&self) -> u8 {
+    pub fn checksum(name: &[u8]) -> u8 {
         let mut checksum: u8 = 0;
 
-        for &x in self.name() {
+        for &x in name {
             checksum = checksum.rotate_right(1).wrapping_add(x);
         }
 
@@ -577,7 +579,7 @@ impl<R: Read> DirIter<R> {
 
         if let Some(iter) = self
             .long_filename_buf
-            .get_buf(dir_entry.checksum())
+            .get_buf(dir_entry.checksum)
             .map_err(|e| {
                 anyhow::anyhow!(
                     "failed to get long filename for {}: {}",

fat-mount/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "fat-mount"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+anyhow = "1.0.98"
+env_logger = "0.11.8"
+fat-fuse = { version = "0.1.0", path = "../fat-fuse" }
+fuser = "0.15.1"

fat-mount/src/main.rs

@@ -0,0 +1,29 @@
+use std::cell::RefCell;
+use std::fs::File;
+use std::rc::Rc;
+
+use fat_fuse::FatFuse;
+use fuser::MountOption;
+
+fn main() -> anyhow::Result<()> {
+    env_logger::init();
+
+    let mut args = std::env::args();
+
+    let path = args.next().ok_or(anyhow::anyhow!("missing fs path"))?;
+    let mountpoint = args.next().ok_or(anyhow::anyhow!("missing mount point"))?;
+
+    let file = File::open(path)?;
+
+    let fat_fuse = FatFuse::new(Rc::new(RefCell::new(file)))?;
+
+    let options = vec![
+        MountOption::RO,
+        MountOption::FSName("fat-fuse".to_owned()),
+        MountOption::AutoUnmount,
+    ];
+
+    fuser::mount2(fat_fuse, mountpoint, &options).unwrap();
+
+    Ok(())
+}