now there are some command flags

ls.go

@@ -3,20 +3,74 @@ package main
 import (
   "io/ioutil"
   "fmt"
-//  "encoding/json"
-//  "os"
   "flag"
+  "log"
+  "syscall"
+  "strconv"
 )
 
 
+func get_fileinfo(f string, size bool, mode bool, inode bool) string{
+  var stat syscall.Stat_t
+  var ret string 
+  ret = "{\"name\":\"" + f + "\""
+  if err := syscall.Stat(f, &stat); err != nil {
+    log.Fatal(err)
+  }
+  if(size){
+    ret = ret + ", \"size\":" + strconv.FormatInt(stat.Size,10)
+  }
+  if(mode){
+    ret = ret + ", \"mode\":" + strconv.Itoa(int(stat.Mode))
+  }
+  if(inode){
+    ret = ret + ", \"inode\":" + strconv.FormatUint(stat.Ino,10)
+  }
+  ret = ret + "}"
+  return ret 
+}
 
 func main() {
-  //dec := json.NewDecoder(os.Stdin)
-  //enc := json.NewEncoder(os.Stdout)
+  // here be the ls flags
+
+  var a_flag bool                      // all files, even ones starting with .
+  var mode_flag bool                   // flags
+  var inode_flag bool		       // inode
+  var size_flag	bool		       // size
+  var first = true
+
+  flag.BoolVar(&a_flag, "a", false, "lists all files in directory, even hidden ones")
+  flag.BoolVar(&mode_flag, "f", false, "include flags for file")  
+  flag.BoolVar(&inode_flag, "i", false, "include flags for file")  
+  flag.BoolVar(&size_flag, "s", false, "include flags for file")  
+  // end ls flag
+
   flag.Parse()
-  root := flag.Arg(0)
+  root := "."//flag.Arg(0)
   dir,_ := ioutil.ReadDir(root)
-  for _,entry := range dir{
-      fmt.Printf("%s\n", entry.Name())
+
+  fmt.Printf("[\n")
+  
+  if(!a_flag){
+    for _,entry := range dir{
+      if(entry.Name()[0]!='.'){
+        if(!first){
+          fmt.Printf(",")
+        }else{
+          first = false
+	}
+        fmt.Printf("%s\n", get_fileinfo(entry.Name(), size_flag, mode_flag, inode_flag))
+      }  
+    }
+  }else{
+    for _,entry := range dir{
+        if(!first){
+          fmt.Printf(",")
+        }else{
+          first = false
+	}
+        fmt.Printf("%s\n", get_fileinfo(entry.Name(), size_flag, mode_flag, inode_flag))
+    }
   }
+  fmt.Printf("]\n")
 }