diff --git a/.cargo/config.toml b/.cargo/config.toml
index e13558992..74e3b891e 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -3,11 +3,12 @@
 runner = "cargo run --package jinux-build --"
 
 [alias]
-kcheck = "check --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins  -Zbuild-std-features=compiler-builtins-mem"
-kbuild = "build --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins  -Zbuild-std-features=compiler-builtins-mem"
-krun = "run --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins  -Zbuild-std-features=compiler-builtins-mem"
-ktest = "test --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins  -Zbuild-std-features=compiler-builtins-mem"
-component-check = "component check --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins  -Zbuild-std-features=compiler-builtins-mem"
+kcheck = "check --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins -Zbuild-std-features=compiler-builtins-mem"
+kbuild = "build --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins -Zbuild-std-features=compiler-builtins-mem"
+krun = "run --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins -Zbuild-std-features=compiler-builtins-mem"
+keval = "run --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins -Zbuild-std-features=compiler-builtins-mem -- --eval"
+ktest = "test --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins -Zbuild-std-features=compiler-builtins-mem"
+component-check = "component check --target x86_64-custom.json -Zbuild-std=core,alloc,compiler_builtins -Zbuild-std-features=compiler-builtins-mem"
 
 [install]
 root = "./target"
diff --git a/Cargo.lock b/Cargo.lock
index 6f44ae0fb..36174c21c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -47,6 +47,55 @@ dependencies = [
  "spinning_top",
 ]
 
+[[package]]
+name = "anstream"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ca84f3628370c59db74ee214b3263d58f9aadd9b4fe7e711fd87dc452b7f163"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is-terminal",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a30da5c5f2d5e72842e00bcb57657162cdabef0931f40e2deb9b4140440cecd"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "938874ff5980b03a87c5524b3ae5b59cf99b1d6bc836848df7bc5ada9643c333"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ca11d4be1bab0c8bc8734a9aa7bf4ee8316d462a08c6ac5052f888fef5b494b"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "180abfa45703aebe0093f79badacc01b8fd4ea2e35118747e5811127f926e188"
+dependencies = [
+ "anstyle",
+ "windows-sys",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.32"
@@ -131,12 +180,65 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
 
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "clap"
+version = "4.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fd304a20bff958a57f04c4e96a2e7594cc4490a0e809cbd48bb6437edaa452d"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+ "once_cell",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01c6a3f08f1fe5662a35cfe393aec09c4df95f60ee93b7556505260f75eee9e1"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.3.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54a9bb5758fc5dfe728d1019941681eccaf0cf8a4189b692a0ee2f2ecf90a050"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.15",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2da6da31387c7e4ef160ffab6d5e7f00c42626fe39aea70a7b0f1773f7dd6c1b"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
+
 [[package]]
 name = "component"
 version = "0.1.0"
@@ -303,6 +405,27 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
 
+[[package]]
+name = "errno"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4bcfec3a70f97c962c307b2d2c56e358cf1d00b558d74262b5f929ee8cc7e73a"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "ext-trait"
 version = "1.0.1"
@@ -409,6 +532,18 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "heck"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
+
+[[package]]
+name = "hermit-abi"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "443144c8cdadd93ebf52ddb4056d257f5b52c04d3c804e657d19eb73fc33668b"
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -470,6 +605,17 @@ dependencies = [
  "ghost",
 ]
 
+[[package]]
+name = "is-terminal"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
+dependencies = [
+ "hermit-abi",
+ "rustix",
+ "windows-sys",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -511,8 +657,7 @@ name = "jinux-build"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "cfg-if",
- "runner-utils",
+ "clap",
 ]
 
 [[package]]
@@ -761,6 +906,12 @@ dependencies = [
  "rle-decode-fast",
 ]
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09fc20d2ca12cb9f044c93e3bd6d32d523e6e2ec3db4f7b2939cd99026ecd3f0"
+
 [[package]]
 name = "lock_api"
 version = "0.4.9"
@@ -1003,16 +1154,6 @@ dependencies = [
  "log",
 ]
 
-[[package]]
-name = "runner-utils"
-version = "0.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9dc6848b056990cd51e72aa5556bdbea4a96013e8b18635d183c84159c2988f"
-dependencies = [
- "thiserror",
- "wait-timeout",
-]
-
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
@@ -1022,6 +1163,19 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.38.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac5ffa1efe7548069688cd7028f32591853cd7b5b756d41bcffd2353e4fc75b4"
+dependencies = [
+ "bitflags 2.3.3",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.9"
@@ -1254,9 +1408,9 @@ checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
 
 [[package]]
 name = "utf8parse"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "936e4b492acfd135421d8dca4b1aa80a7bfc26e702ef3af710e0752684df5372"
+checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
 [[package]]
 name = "version_check"
@@ -1297,21 +1451,78 @@ dependencies = [
  "quote",
 ]
 
-[[package]]
-name = "wait-timeout"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05d4b17490f70499f20b9e791dcf6a299785ce8af4d709018206dc5b4953e95f"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
 [[package]]
 name = "winnow"
 version = "0.3.3"
diff --git a/Makefile b/Makefile
index 34311466b..97753c49e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: all build clean docs fmt run setup test tools
+.PHONY: all build clean docs fmt run setup test tools eval
 
 all: build
 
@@ -18,6 +18,11 @@ tools:
 run: build
 	@cargo krun
 
+# Test Jinux in a QEMU guest VM and run a series of evaluations.
+eval: build
+	@cargo keval
+
+# The usermode cargo test of Jinux frame and Jinux standard library.
 test: build
 	@cargo ktest
 
diff --git a/build/Cargo.toml b/build/Cargo.toml
index 310190d2a..96acfe5f9 100644
--- a/build/Cargo.toml
+++ b/build/Cargo.toml
@@ -5,10 +5,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-runner-utils = "0.0.2"
 anyhow = "1.0.32"
-cfg-if = "1.0"
-
-[features]
-default = []
-iommu = []
+clap = { version = "4.3.19", features = ["derive"] }
diff --git a/build/src/main.rs b/build/src/main.rs
index cbc400b3a..fa7578968 100644
--- a/build/src/main.rs
+++ b/build/src/main.rs
@@ -1,21 +1,41 @@
-use anyhow::anyhow;
+//! This is the Jinux runner to ease the pain of
+//! running and testing Jinux inside a QEMU VM.
+
 use std::{
     fs::OpenOptions,
-    ops::Add,
     path::{Path, PathBuf},
-    process::{Command, ExitStatus},
-    time::Duration,
+    process::Command,
 };
 
+use clap::Parser;
+
+/// The CLI of this runner.
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    // Positional arguments.
+    /// The Jinux binary path.
+    path: PathBuf,
+
+    // Options.
+    /// Automatically run integration tests and exit.
+    #[arg(short, long, default_value_t = false)]
+    eval: bool,
+
+    /// Emulate Intel IOMMU by QEMU.
+    #[arg(short, long, default_value_t = false)]
+    iommu: bool,
+}
+
 const COMMON_ARGS: &[&str] = &[
     "--no-reboot",
     "-machine",
     "q35,kernel-irqchip=split",
-    "-enable-kvm",
     "-cpu",
     "Icelake-Server,+x2apic",
     "-m",
     "2G",
+    "-enable-kvm",
     "-nographic", // TODO: figure out why grub can't shown up without it
     "-monitor",
     "vc",
@@ -23,148 +43,103 @@ const COMMON_ARGS: &[&str] = &[
     "mon:stdio",
     "-display",
     "none",
-];
-
-cfg_if::cfg_if!(
-    if #[cfg(feature="iommu")] {
-        macro_rules! virtio_device_args {
-            ($($args:tt),*) => {
-                concat!($($args,)*"disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on",)
-            };
-        }
-        const OPTION_ARGS: &[&str] = &[
-            "-device",
-            "intel-iommu,intremap=on,device-iotlb=on",
-            "-device",
-            "ioh3420,id=pcie.0,chassis=1",
-        ];
-    } else {
-        macro_rules! virtio_device_args {
-            ($($args:tt),*) => {
-                concat!($($args,)*"disable-legacy=on,disable-modern=off",)
-            };
-        }
-        const OPTION_ARGS: &[&str] = &[];
-    }
-);
-
-const DEVICE_ARGS: &[&str] = &[
     "-device",
     "isa-debug-exit,iobase=0xf4,iosize=0x04",
-    "-device",
-    virtio_device_args!("virtio-blk-pci,bus=pcie.0,addr=0x6,drive=x0,"),
-    "-device",
-    virtio_device_args!("virtio-keyboard-pci,"),
-    "-device",
-    virtio_device_args!("virtio-net-pci,netdev=net01,"),
     "-netdev",
     "user,id=net01,hostfwd=tcp::30022-:22,hostfwd=tcp::30080-:8080",
     "-object",
     "filter-dump,id=filter0,netdev=net01,file=virtio-net.pcap",
 ];
 
-const RUN_ARGS: &[&str] = &[];
-const TEST_ARGS: &[&str] = &[];
-const TEST_TIMEOUT_SECS: u64 = 30;
+const COMMON_DEVICE_ARGS: &[&str] = &[
+    "-device",
+    "virtio-blk-pci,bus=pcie.0,addr=0x6,drive=x0,disable-legacy=on,disable-modern=off",
+    "-device",
+    "virtio-keyboard-pci,disable-legacy=on,disable-modern=off",
+    "-device",
+    "virtio-net-pci,netdev=net01,disable-legacy=on,disable-modern=off",
+];
 
-fn main() -> anyhow::Result<()> {
-    let mut args = std::env::args().skip(1);
-    let kernel_binary_path = {
-        let path = PathBuf::from(args.next().unwrap());
-        path.canonicalize().unwrap()
-    };
+const IOMMU_DEVICE_ARGS: &[&str] = &[
+    "-device",
+    "virtio-blk-pci,bus=pcie.0,addr=0x6,drive=x0,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on",
+    "-device",
+    "virtio-keyboard-pci,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on",
+    "-device",
+    "virtio-net-pci,netdev=net01,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on",
+    "-device",
+    "intel-iommu,intremap=on,device-iotlb=on",
+    "-device",
+    "ioh3420,id=pcie.0,chassis=1",
+];
 
-    call_bootloader_build_script(
-        &PathBuf::from("build/grub/scripts/build-grub-image.sh"),
-        &kernel_binary_path,
-    )
-    .unwrap();
+fn main() {
+    let args = Args::parse();
 
-    let kernel_iso_path = {
-        let a = kernel_binary_path.parent().unwrap();
-        let str = kernel_binary_path
-            .file_name()
-            .unwrap()
-            .to_str()
-            .unwrap()
-            .to_string();
-        a.join(str.add(".iso"))
-    };
+    if args.eval {
+        panic!("No eval yet.");
+    }
 
     let mut qemu_cmd = Command::new("qemu-system-x86_64");
 
-    let binary_kind = runner_utils::binary_kind(&kernel_binary_path);
     let mut qemu_args = COMMON_ARGS.clone().to_vec();
-
-    qemu_args.extend(DEVICE_ARGS.clone().to_vec().iter());
-    qemu_args.extend(OPTION_ARGS.clone().to_vec().iter());
-    qemu_args.push("-drive");
-    let binding = create_fs_image(kernel_binary_path.as_path())?;
-    qemu_args.push(binding.as_str());
-    qemu_cmd.arg("-cdrom");
-    qemu_cmd.arg(kernel_iso_path.to_str().unwrap());
-    if binary_kind.is_test() {
-        qemu_args.append(&mut TEST_ARGS.to_vec());
-        qemu_cmd.args(qemu_args);
-        qemu_cmd.args(args);
-        println!("testing:{:?}", qemu_cmd);
-
-        let exit_status = run_test_command(qemu_cmd)?;
-        match exit_status.code() {
-            Some(33) => {} // success
-            other => return Err(anyhow!("Test failed (exit code: {:?})", other)),
-        }
+    if args.iommu {
+        qemu_args.extend(IOMMU_DEVICE_ARGS.clone().to_vec().iter());
     } else {
-        qemu_args.append(&mut RUN_ARGS.to_vec());
-        qemu_cmd.args(qemu_args);
-        qemu_cmd.args(args);
-        println!("running:{:?}", qemu_cmd);
-
-        let exit_status = qemu_cmd.status()?;
-        if !exit_status.success() {
-            std::process::exit(exit_status.code().unwrap_or(1));
-        }
+        qemu_args.extend(COMMON_DEVICE_ARGS.clone().to_vec().iter());
     }
-    Ok(())
-}
 
-fn call_bootloader_build_script(
-    script_path: &PathBuf,
-    kernel_path: &PathBuf,
-) -> anyhow::Result<()> {
-    let mut cmd = Command::new(script_path.to_str().unwrap());
-    cmd.arg(kernel_path.to_str().unwrap());
-    let exit_status = cmd.status()?;
+    let fs_image = create_fs_image(args.path.as_path());
+    qemu_args.push("-drive");
+    qemu_args.push(fs_image.as_str());
+
+    let bootdev_image = create_bootdev_image(args.path);
+    qemu_cmd.arg("-cdrom");
+    qemu_cmd.arg(bootdev_image.as_str());
+
+    qemu_cmd.args(qemu_args);
+
+    println!("running:{:?}", qemu_cmd);
+
+    let exit_status = qemu_cmd.status().unwrap();
     if !exit_status.success() {
         std::process::exit(exit_status.code().unwrap_or(1));
     }
-    Ok(())
 }
 
-fn create_fs_image(path: &Path) -> anyhow::Result<String> {
+fn call_bootloader_build_script(script_path: &PathBuf, kernel_path: &PathBuf) {
+    let mut cmd = Command::new(script_path.to_str().unwrap());
+    cmd.arg(kernel_path.to_str().unwrap());
+    let exit_status = cmd.status().unwrap();
+    if !exit_status.success() {
+        std::process::exit(exit_status.code().unwrap_or(1));
+    }
+}
+
+fn create_bootdev_image(path: PathBuf) -> String {
+    call_bootloader_build_script(
+        &PathBuf::from("build/grub/scripts/build-grub-image.sh"),
+        &path,
+    );
+    let dir = path.parent().unwrap();
+    let name = path.file_name().unwrap().to_str().unwrap().to_string();
+    dir.join(name + ".iso").to_str().unwrap().to_string()
+}
+
+fn create_fs_image(path: &Path) -> String {
     let mut fs_img_path = path.parent().unwrap().to_str().unwrap().to_string();
     fs_img_path.push_str("/fs.img");
     let path = Path::new(fs_img_path.as_str());
     if path.exists() {
-        return Ok(format!(
-            "file={},if=none,format=raw,id=x0",
-            fs_img_path.as_str()
-        ));
+        return format!("file={},if=none,format=raw,id=x0", fs_img_path.as_str());
     }
     let f = OpenOptions::new()
         .read(true)
         .write(true)
         .create(true)
-        .open(fs_img_path.as_str())?;
+        .open(fs_img_path.as_str())
+        .unwrap();
     // 32MiB
     f.set_len(64 * 1024 * 1024).unwrap();
-    Ok(format!(
-        "file={},if=none,format=raw,id=x0",
-        fs_img_path.as_str()
-    ))
-}
-
-fn run_test_command(mut cmd: Command) -> anyhow::Result<ExitStatus> {
-    let status = runner_utils::run_with_timeout(&mut cmd, Duration::from_secs(TEST_TIMEOUT_SECS))?;
-    Ok(status)
+    format!("file={},if=none,format=raw,id=x0", fs_img_path.as_str())
 }
diff --git a/services/libs/jinux-std/src/lib.rs b/services/libs/jinux-std/src/lib.rs
index 91489c42d..19b7f6ff3 100644
--- a/services/libs/jinux-std/src/lib.rs
+++ b/services/libs/jinux-std/src/lib.rs
@@ -83,7 +83,8 @@ fn init_thread() {
         karg.get_initproc_path().unwrap(),
         karg.get_initproc_argv().unwrap().to_vec(),
         karg.get_initproc_envp().unwrap().to_vec(),
-    ).expect("Run init process failed.");
+    )
+    .expect("Run init process failed.");
 
     loop {
         // If initproc becomes zombie, then exit qemu.