3 files changed, 13 insertions, 2 deletions
diff --git a/Cargo.lock b/Cargo.lock
index e08dae3..a77c839 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,6 +3,12 @@
 version = 4
 
 [[package]]
+name = "anyhow"
+version = "1.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
+
+[[package]]
 name = "libc"
 version = "0.2.176"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -21,5 +27,6 @@ dependencies = [
 name = "trve"
 version = "0.0.0"
 dependencies = [
+ "anyhow",
  "memmap2",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 59f1a2f..003b0b5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,4 +4,5 @@ version = "0.0.0"
 edition = "2024"
 
 [dependencies]
+anyhow = "1.0.100"
 memmap2 = "0.9.8"
diff --git a/src/main.rs b/src/main.rs
index 67186bb..5e20b1a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -19,6 +19,8 @@ use trve::{
     mem::{DeviceEntry, MemAccessFault, MemConfig, MemDeviceInterface, PageNum, Ram},
 };
 
+use anyhow::{Result, bail};
+
 use crate::basic_uart::BasicUart;
 
 fn read_file_to_buffer(path: &str, buffer: &mut [u8]) -> io::Result<usize> {
@@ -41,14 +43,15 @@ fn read_file_to_buffer(path: &str, buffer: &mut [u8]) -> io::Result<usize> {
     Ok(total_read)
 }
 
-fn main() -> Result<(), Box<dyn Error>> {
+fn main() -> Result<()> {
     let mut ram = Ram::try_new(16 * 1024 * 1024 / 4096)?;
     let buf = ram.buf_mut();
 
     let args: Vec<String> = env::args().collect();
 
     if args.len() != 2 {
-        eprintln!("USAGE: trve <ram_image>")
+        eprintln!("USAGE: trve <ram_image>");
+        bail!("Wrong number of arguments");
     }
 
     read_file_to_buffer(&args[1], buf)?;