code review 163085: move ReadFile, WriteFile, and ReadDir into a separate i...

src/pkg/debug/proc/proc_linux.go

 // Copyright 2009 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package proc
 
 // TODO(rsc): Imports here after to be in proc.go too in order
 // for deps.bash to get the right answer.
 import (
         "container/vector";
         "fmt";
-        "io";
+        "io/ioutil";
         "os";
         "runtime";
         "strconv";
         "strings";
         "sync";
         "syscall";
 )
 
 // This is an implementation of the process tracing interface using
 // Linux's ptrace(2) interface.  The implementation is multi-threaded.
@@ skipping 1185 matching lines @@
                                 return err
                         }
                         if _, ok := p.threads[tid]; ok {
                                 continue
                         }
 
                         _, err = p.attachThread(tid);
                         if err != nil {
                                 // There could have been a race, or
                                 // this process could be a zobmie.
-                                statFile, err2 := io.ReadFile(taskPath + "/" + tidStr + "/stat");
+                                statFile, err2 := ioutil.ReadFile(taskPath + "/" + tidStr + "/stat");
                                 if err2 != nil {
                                         switch err2 := err2.(type) {
                                         case *os.PathError:
                                                 if err2.Error == os.ENOENT {
                                                         // Raced with thread exit
                                                         p.logTrace("raced with thread %d exit", tid);
                                                         continue;
                                                 }
                                         }
                                         // Return the original error
@@ skipping 79 matching lines @@
                 _, err := p.newThread(pid, syscall.SIGTRAP, false);
                 return err;
         });
         if err != nil {
                 p.stopMonitor(err);
                 return nil, err;
         }
 
         return p, nil;
 }