diff --git a/native/src/boot/cli.rs b/native/src/boot/cli.rs
index 94c18a52f..96eeedb8d 100644
--- a/native/src/boot/cli.rs
+++ b/native/src/boot/cli.rs
@@ -1,12 +1,17 @@
-use crate::payload::extract_boot_from_payload;
-use crate::sign::{sha1_hash, verify_boot_image};
-use argh::FromArgs;
-use base::{cmdline_logging, libc::umask, log_err, map_args, raw_cstr, EarlyExitExt, LoggedResult, MappedFile, ResultExt, Utf8CStr};
-use std::ffi::c_char;
-use crate::cpio::cpio_commands;
-use crate::dtb::dtb_commands;
-use crate::ffi::{cleanup, compress, decompress_raw, formats, repack, sign, split_image_dtb, unpack, verify};
+use crate::cpio::{cpio_commands, print_cpio_usage};
+use crate::dtb::{dtb_commands, print_dtb_usage};
+use crate::ffi::{
+    cleanup, compress, decompress_raw, formats, repack, sign, split_image_dtb, unpack, verify
+};
 use crate::patch::hexpatch;
+use crate::payload::extract_boot_from_payload;
+use crate::sign::sha1_hash;
+use argh::FromArgs;
+use base::{
+    cmdline_logging, libc::umask, log_err, map_args, raw_cstr, EarlyExitExt, LoggedResult,
+    MappedFile, ResultExt, Utf8CStr,
+};
+use std::ffi::c_char;
 
 #[derive(FromArgs)]
 struct Cli {
@@ -245,7 +250,8 @@ Supported actions:
 
     {1}
 "#,
-        cmd, formats()
+        cmd,
+        formats()
     );
 }
 
@@ -274,14 +280,22 @@ pub unsafe extern "C" fn main(
             cmds[3] = fmt;
         }
 
-        let mut cli = Cli::from_args(&[cmds[0]], &cmds[1..]).on_early_exit(|| print_usage(cmds[0]));
+        let mut cli = Cli::from_args(&[cmds[0]], &cmds[1..]).on_early_exit(|| match cmds.get(1) {
+            Some(&"dtb") => print_dtb_usage(),
+            Some(&"cpio") => print_cpio_usage(),
+            _ => print_usage(cmds[0]),
+        });
         match cli.action {
             Action::Unpack(Unpack {
                 no_decompress,
                 dump_header,
                 ref mut img,
             }) => {
-                return unpack(Utf8CStr::from_string(img).as_ptr(), no_decompress, dump_header);
+                return unpack(
+                    Utf8CStr::from_string(img).as_ptr(),
+                    no_decompress,
+                    dump_header,
+                );
             }
             Action::Repack(Repack {
                 no_compress,
@@ -310,7 +324,9 @@ pub unsafe extern "C" fn main(
                 };
                 return sign(
                     Utf8CStr::from_string(img).as_ptr(),
-                    args.first_mut().map(|x| Utf8CStr::from_string(x).as_ptr()).unwrap_or(raw_cstr!("/boot")),
+                    args.first_mut()
+                        .map(|x| Utf8CStr::from_string(x).as_ptr())
+                        .unwrap_or(raw_cstr!("/boot")),
                     pem, pk8
                 )
             }
@@ -337,18 +353,14 @@ pub unsafe extern "C" fn main(
                     Err(log_err!("Failed to patch"))?;
                 }
             }
-            Action::Cpio(Cpio {
-                ref cmds,
-            }) => {
+            Action::Cpio(Cpio { ref cmds }) => {
                 return if cpio_commands(&cmds.iter().map(|x| x.as_str()).collect::<Vec<_>>()) {
                     0
                 } else {
                     1
                 }
             }
-            Action::Dtb(Dtb {
-                ref cmds,
-            }) => {
+            Action::Dtb(Dtb { ref cmds }) => {
                 return if dtb_commands(&cmds.iter().map(|x| x.as_str()).collect::<Vec<_>>()) {
                     0
                 } else {
@@ -378,14 +390,25 @@ pub unsafe extern "C" fn main(
                 ref mut file,
                 ref mut out,
             }) => {
-                decompress_raw(Utf8CStr::from_string(file).as_mut_ptr(), out.as_mut().map(|x| Utf8CStr::from_string(x).as_ptr()).unwrap_or(std::ptr::null()));
+                decompress_raw(
+                    Utf8CStr::from_string(file).as_mut_ptr(),
+                    out.as_mut()
+                        .map(|x| Utf8CStr::from_string(x).as_ptr())
+                        .unwrap_or(std::ptr::null()),
+                );
             }
             Action::Compress(Compress {
                 ref mut file,
                 ref mut format,
                 ref mut out,
             }) => {
-                compress(Utf8CStr::from_string(format).as_ptr(), Utf8CStr::from_string(file).as_ptr(), out.as_mut().map(|x| Utf8CStr::from_string(x).as_ptr()).unwrap_or(std::ptr::null()));
+                compress(
+                    Utf8CStr::from_string(format).as_ptr(),
+                    Utf8CStr::from_string(file).as_ptr(),
+                    out.as_mut()
+                        .map(|x| Utf8CStr::from_string(x).as_ptr())
+                        .unwrap_or(std::ptr::null()),
+                );
             }
         }
     };
diff --git a/native/src/boot/cpio.rs b/native/src/boot/cpio.rs
index 12f8e90cd..2462cff75 100644
--- a/native/src/boot/cpio.rs
+++ b/native/src/boot/cpio.rs
@@ -15,13 +15,13 @@ use num_traits::cast::AsPrimitive;
 use size::{Base, Size, Style};
 
 use base::libc::{
-    dev_t, gid_t, major, makedev, minor, mknod, mode_t, uid_t, O_CLOEXEC, O_CREAT,
-    O_RDONLY, O_TRUNC, O_WRONLY, S_IFBLK, S_IFCHR, S_IFDIR, S_IFLNK, S_IFMT, S_IFREG, S_IRGRP,
-    S_IROTH, S_IRUSR, S_IWGRP, S_IWOTH, S_IWUSR, S_IXGRP, S_IXOTH, S_IXUSR,
+    dev_t, gid_t, major, makedev, minor, mknod, mode_t, uid_t, O_CLOEXEC, O_CREAT, O_RDONLY,
+    O_TRUNC, O_WRONLY, S_IFBLK, S_IFCHR, S_IFDIR, S_IFLNK, S_IFMT, S_IFREG, S_IRGRP, S_IROTH,
+    S_IRUSR, S_IWGRP, S_IWOTH, S_IWUSR, S_IXGRP, S_IXOTH, S_IXUSR,
 };
 use base::{
-    cstr_buf, log_err, BytesExt, EarlyExitExt, FsPath, LoggedResult, MappedFile,
-    ResultExt, Utf8CStr, Utf8CStrBuf, WriteExt,
+    cstr_buf, log_err, BytesExt, EarlyExitExt, FsPath, LoggedResult, MappedFile, ResultExt, Utf8CStr,
+    Utf8CStrBuf, WriteExt,
 };
 
 use crate::check_env;
@@ -150,7 +150,7 @@ struct List {
     recursive: bool,
 }
 
-fn print_cpio_usage() {
+pub(crate) fn print_cpio_usage() {
     eprintln!(
         r#"Usage: magiskboot cpio <incpio> [commands...]
 
@@ -756,7 +756,7 @@ impl Display for CpioEntry {
 pub fn cpio_commands(cmds: &Vec<&str>) -> bool {
     let res: LoggedResult<()> = try {
         let mut cli =
-            CpioCli::from_args(&["magiskboot", "cpio"], &cmds).on_early_exit(print_cpio_usage);
+            CpioCli::from_args(&["magiskboot", "cpio"], cmds).on_early_exit(print_cpio_usage);
 
         let file = Utf8CStr::from_string(&mut cli.file);
         let mut cpio = if FsPath::from(file).exists() {
diff --git a/native/src/boot/dtb.rs b/native/src/boot/dtb.rs
index 8e423e75a..8096697dd 100644
--- a/native/src/boot/dtb.rs
+++ b/native/src/boot/dtb.rs
@@ -6,9 +6,7 @@ use fdt::{
     Fdt, FdtError,
 };
 
-use base::{
-    EarlyExitExt, LoggedResult, MappedFile, ResultExt, Utf8CStr,
-};
+use base::{EarlyExitExt, LoggedResult, MappedFile, ResultExt, Utf8CStr};
 
 use crate::{check_env, patch::patch_verity};
 
@@ -43,7 +41,7 @@ struct Patch {}
 #[argh(subcommand, name = "test")]
 struct Test {}
 
-fn print_dtb_usage() {
+pub(crate) fn print_dtb_usage() {
     eprintln!(
         r#"Usage: magiskboot dtb <file> <action> [args...]
 Do dtb related actions to <file>.