diff --git a/.travis.yml b/.travis.yml
index 8b2e7ea..9eda8c9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -63,5 +63,5 @@ before_script:
     fi
 
 script:
+  - cd user && make sfsimg arch=$ARCH && cd ..
   - cd kernel && make build arch=$ARCH $OPTS && cd ..
-  - cd user && make arch=$ARCH
diff --git a/kernel/src/process/context.rs b/kernel/src/process/context.rs
index 1e012af..ac7e0a6 100644
--- a/kernel/src/process/context.rs
+++ b/kernel/src/process/context.rs
@@ -1,7 +1,7 @@
 use alloc::{boxed::Box, collections::BTreeMap, string::String, sync::Arc, vec::Vec};
 
 use log::*;
-use simple_filesystem::file::File;
+use simple_filesystem::{file::File, INode};
 use spin::Mutex;
 use rcore_process::Context;
 use xmas_elf::{ElfFile, header, program::{Flags, Type}};
@@ -16,7 +16,7 @@ pub struct Process {
     pub arch: ArchContext,
     pub memory_set: MemorySet,
     pub kstack: KernelStack,
-    pub files: BTreeMap<usize, Arc<Mutex<File>>>,
+    pub files: BTreeMap<usize, Arc<Mutex<File>>>, // FIXME: => Box<File>
     pub cwd: String,
 }
 
@@ -100,6 +100,11 @@ impl Process {
 
         let kstack = KernelStack::new();
 
+        let mut files = BTreeMap::new();
+        files.insert(0, Arc::new(Mutex::new(File::new(crate::fs::STDIN.clone(), true, false))));
+        files.insert(1, Arc::new(Mutex::new(File::new(crate::fs::STDOUT.clone(), false, true))));
+        files.insert(2, Arc::new(Mutex::new(File::new(crate::fs::STDOUT.clone(), false, true))));
+
         Box::new(Process {
             arch: unsafe {
                 ArchContext::new_user_thread(
@@ -107,7 +112,7 @@ impl Process {
             },
             memory_set,
             kstack,
-            files: BTreeMap::default(),
+            files,
             cwd: String::new(),
         })
     }
diff --git a/user b/user
index 86bb44b..d84f214 160000
--- a/user
+++ b/user
@@ -1 +1 @@
-Subproject commit 86bb44b00d6af6f8fc63bc6179bc0b6cb5d3373b
+Subproject commit d84f21465c97dbcdbc998be72f3431de3b077fb0