libgo/go/os/os_unix_test.go

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // +build darwin freebsd linux netbsd openbsd
   6
   7 package os_test
   8
   9 import (
  10         . "os"
  11         "runtime"
  12         "syscall"
  13         "testing"
  14 )
  15
  16 func checkUidGid(t *testing.T, path string, uid, gid int) {
  17         dir, err := Stat(path)
  18         if err != nil {
  19                 t.Fatalf("Stat %q (looking for uid/gid %d/%d): %s", path, uid, gid, err)
  20         }
  21         sys := dir.Sys().(*syscall.Stat_t)
  22         if int(sys.Uid) != uid {
  23                 t.Errorf("Stat %q: uid %d want %d", path, sys.Uid, uid)
  24         }
  25         if int(sys.Gid) != gid {
  26                 t.Errorf("Stat %q: gid %d want %d", path, sys.Gid, gid)
  27         }
  28 }
  29
  30 func TestChown(t *testing.T) {
  31         // Chown is not supported under windows or Plan 9.
  32         // Plan9 provides a native ChownPlan9 version instead.
  33         if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
  34                 return
  35         }
  36         // Use TempDir() to make sure we're on a local file system,
  37         // so that the group ids returned by Getgroups will be allowed
  38         // on the file.  On NFS, the Getgroups groups are
  39         // basically useless.
  40         f := newFile("TestChown", t)
  41         defer Remove(f.Name())
  42         defer f.Close()
  43         dir, err := f.Stat()
  44         if err != nil {
  45                 t.Fatalf("stat %s: %s", f.Name(), err)
  46         }
  47
  48         // Can't change uid unless root, but can try
  49         // changing the group id.  First try our current group.
  50         gid := Getgid()
  51         t.Log("gid:", gid)
  52         if err = Chown(f.Name(), -1, gid); err != nil {
  53                 t.Fatalf("chown %s -1 %d: %s", f.Name(), gid, err)
  54         }
  55         sys := dir.Sys().(*syscall.Stat_t)
  56         checkUidGid(t, f.Name(), int(sys.Uid), gid)
  57
  58         // Then try all the auxiliary groups.
  59         groups, err := Getgroups()
  60         if err != nil {
  61                 t.Fatalf("getgroups: %s", err)
  62         }
  63         t.Log("groups: ", groups)
  64         for _, g := range groups {
  65                 if err = Chown(f.Name(), -1, g); err != nil {
  66                         t.Fatalf("chown %s -1 %d: %s", f.Name(), g, err)
  67                 }
  68                 checkUidGid(t, f.Name(), int(sys.Uid), g)
  69
  70                 // change back to gid to test fd.Chown
  71                 if err = f.Chown(-1, gid); err != nil {
  72                         t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err)
  73                 }
  74                 checkUidGid(t, f.Name(), int(sys.Uid), gid)
  75         }
  76 }