将创建/bin/false文件移入程序

user/apps/test-chown/README.md

@@ -2,13 +2,7 @@
 
 ### 由于symlink系统调用还未实现，目前只测试chown和fchown
 
-### 测试前需要手动添加nogroup用户组和nobody用户
+### 测试前需要手动添加nogroup用户组和nobody用户（程序里加不了）
 ```groupadd -g 65534 nogroup
 useradd -d /nonexistent -g 65534 -u 65534 -s /bin/false nobody
 ```
-
-### /bin/false是个不可执行文件，用于测试chown系列系统调用时，文件权限的修改不会生效。
-```
-#!/bin/bash
-exit 1
-```

user/apps/test-chown/src/main.rs

@@ -1,18 +1,20 @@
 use core::ffi::{c_char, c_void};
 use libc::{
- chown, fchown, fchownat, getgrnam, getpwnam, lchown, mount, umount, 
- gid_t, uid_t, AT_FDCWD, AT_SYMLINK_NOFOLLOW,
+ chown, fchown, fchownat, getgrnam, getpwnam, gid_t, lchown, mount, uid_t, umount, AT_FDCWD,
+ AT_SYMLINK_NOFOLLOW,
 };
 use nix::errno::Errno;
 use std::{
  ffi::CString,
- fs::{self, File},
- io::{Error, Write},
- os::unix::{fs::MetadataExt, io::AsRawFd},
+ fs::{self, metadata, File},
+ io::{self, Error, Write},
+ os::unix::{
+ fs::{MetadataExt, PermissionsExt},
+ io::AsRawFd,
+ },
  path::Path,
 };
 
-
 fn print_file_owner_group(filename: &str) -> Result<(), Error> {
  let metadata = std::fs::metadata(filename)?;
  let uid = metadata.uid();
@@ -68,6 +70,7 @@ fn test_lchown(symlink_name: &str, new_uid: uid_t, new_gid: gid_t) -> Result<(),
 }
 
 fn main() -> Result<(), Error> {
+ create_false_file()?;
  mount_test_ramfs();
 
  let filename = "/mnt/myramfs/testfile.txt";
@@ -152,3 +155,21 @@ fn umount_test_ramfs() {
  assert_eq!(result, 0, "Umount myramfs failed");
  println!("Umount myramfs for test success!");
 }
+
+fn create_false_file() -> io::Result<()> {
+ let path = Path::new("/bin/false");
+ if metadata(path).is_ok() {
+ return Ok(());
+ }
+
+ let mut file = File::create(path)?;
+
+ file.write_all(b"#!/bin/bash\nexit 1\n")?;
+
+ let mut permissions = file.metadata()?.permissions();
+ permissions.set_mode(0o755); // 设置权限为755
+ std::fs::set_permissions(path, permissions)?;
+
+ println!("File created successfully at {:?}", path);
+ Ok(())
+}