Implement env support in sys_exec

kernel/src/process/abi.rs

@@ -5,7 +5,7 @@ use core::ptr::null;
 
 pub struct ProcInitInfo {
     pub args: Vec<String>,
-    pub envs: BTreeMap<String, String>,
+    pub envs: Vec<String>,
     pub auxv: BTreeMap<u8, usize>,
 }
 
@@ -19,10 +19,8 @@ impl ProcInitInfo {
         let envs: Vec<_> = self
             .envs
             .iter()
-            .map(|(key, value)| {
-                writer.push_str(value.as_str());
-                writer.push_slice(&[b"="]);
-                writer.push_slice(key.as_bytes());
+            .map(|arg| {
+                writer.push_str(arg.as_str());
                 writer.sp
             })
             .collect();

kernel/src/process/structs.rs

@@ -158,7 +158,12 @@ impl Thread {
     }
 
     /// Make a new user process from ELF `data`
-    pub fn new_user<'a, Iter>(data: &[u8], exec_path: &str, args: Iter) -> Box<Thread>
+    pub fn new_user<'a, Iter>(
+        data: &[u8],
+        exec_path: &str,
+        args: Iter,
+        envs: Vec<String>,
+    ) -> Box<Thread>
     where
         Iter: Iterator<Item = &'a str>,
     {
@@ -185,7 +190,7 @@ impl Thread {
                     new_args.insert(1, exec_path);
                     new_args.remove(2);
                     warn!("loader args: {:?}", new_args);
-                    return Thread::new_user(buf.as_slice(), exec_path,new_args.into_iter());
+                    return Thread::new_user(buf.as_slice(), exec_path, new_args.into_iter(), envs);
                 } else {
                     warn!("loader specified as {} but failed to read", &loader_path);
                 }
@@ -215,7 +220,7 @@ impl Thread {
         // Make init info
         let init_info = ProcInitInfo {
             args: args.map(|s| String::from(s)).collect(),
-            envs: BTreeMap::new(),
+            envs,
             auxv: {
                 let mut map = BTreeMap::new();
                 if let Some(phdr_vaddr) = elf.get_phdr_vaddr() {
@@ -421,7 +426,7 @@ impl ElfExt for ElfFile<'_> {
                     virt_addr + mem_size,
                     ph.flags().to_attr(),
                     ByFrame::new(GlobalFrameAlloc),
-                    "",
+                    "elf",
                 );
                 unsafe { ::core::slice::from_raw_parts_mut(virt_addr as *mut u8, mem_size) }
             };

kernel/src/shell.rs

@@ -10,9 +10,12 @@ use alloc::vec::Vec;
 pub fn run_user_shell() {
     if let Ok(inode) = ROOT_INODE.lookup("rust/sh") {
         let data = inode.read_as_vec().unwrap();
-        processor()
-            .manager()
-            .add(Thread::new_user(data.as_slice(), "rust/sh", "sh".split(' ')));
+        processor().manager().add(Thread::new_user(
+            data.as_slice(),
+            "rust/sh",
+            "sh".split(' '),
+            Vec::new(),
+        ));
     } else {
         processor().manager().add(Thread::new_kernel(shell, 0));
     }
@@ -23,9 +26,11 @@ pub fn run_user_shell() {
     let cmdline = CMDLINE.read();
     let inode = ROOT_INODE.lookup(&cmdline).unwrap();
     let data = inode.read_as_vec().unwrap();
-    processor()
-        .manager()
-        .add(Thread::new_user(data.as_slice(), cmdline.split(' ')));
+    processor().manager().add(Thread::new_user(
+        data.as_slice(),
+        cmdline.split(' '),
+        Vec::new(),
+    ));
 }
 
 pub extern "C" fn shell(_arg: usize) -> ! {
@@ -42,9 +47,12 @@ pub extern "C" fn shell(_arg: usize) -> ! {
         let name = cmd.trim().split(' ').next().unwrap();
         if let Ok(file) = ROOT_INODE.lookup(name) {
             let data = file.read_as_vec().unwrap();
-            let _pid = processor()
-                .manager()
-                .add(Thread::new_user(data.as_slice(), &cmd, cmd.split(' ')));
+            let _pid = processor().manager().add(Thread::new_user(
+                data.as_slice(),
+                &cmd,
+                cmd.split(' '),
+                Vec::new(),
+            ));
         // TODO: wait until process exits, or use user land shell completely
         //unsafe { thread::JoinHandle::<()>::_of(pid) }.join().unwrap();
         } else {

kernel/src/syscall/mod.rs

@@ -208,11 +208,11 @@ pub fn syscall(id: usize, args: [usize; 6], tf: &mut TrapFrame) -> isize {
             warn!("sys_getpgid is unimplemented");
             Ok(0)
         }
-        SYS_GETGROUPS=> {
+        SYS_GETGROUPS => {
             warn!("sys_getgroups is unimplemented");
             Ok(0)
         }
-        SYS_SETGROUPS=> {
+        SYS_SETGROUPS => {
             warn!("sys_setgroups is unimplemented");
             Ok(0)
         }

kernel/src/syscall/proc.rs

@@ -146,23 +146,28 @@ pub fn sys_exec(
             current_argv = current_argv.add(1);
         }
     }
-//    // Check and copy envs to kernel
-//    let mut envs = Vec::new();
-//    unsafe {
-//        let mut current_env = envp as *const *const u8;
-//        proc.vm.check_read_ptr(current_env)?;
-//        while !(*current_env).is_null() {
-//            let env = proc.vm.check_and_clone_cstr(*current_env)?;
-//            envs.push(env);
-//            current_env = current_env.add(1);
-//        }
-//    }
-//
+    // Check and copy envs to kernel
+    let mut envs = Vec::new();
+    unsafe {
+        let mut current_env = envp as *const *const u8;
+        if !current_env.is_null() {
+            proc.vm.check_read_ptr(current_env)?;
+            while !(*current_env).is_null() {
+                let env = proc.vm.check_and_clone_cstr(*current_env)?;
+                envs.push(env);
+                current_env = current_env.add(1);
+            }
+        }
+    }
+
     if args.is_empty() {
         return Err(SysError::EINVAL);
     }
 
-    info!("EXEC: name:{:?} , args {:?}", exec_name, args);
+    info!(
+        "EXEC: name:{:?} , args {:?}, envp {:?}",
+        exec_name, args, envs
+    );
 
     // Read program file
     //let path = args[0].as_str();
@@ -171,8 +176,8 @@ pub fn sys_exec(
     let buf = inode.read_as_vec()?;
 
     // Make new Thread
-    let iter = args.iter().map(|s| s.as_str());
-    let mut thread = Thread::new_user(buf.as_slice(), exec_path, iter);
+    let args_iter = args.iter().map(|s| s.as_str());
+    let mut thread = Thread::new_user(buf.as_slice(), exec_path, args_iter, envs);
     thread.proc.lock().clone_for_exec(&proc);
 
     // Activate new page table