github.com/reiver/go@v0.0.0-20150109200633-1d0c7792f172/src/os/os_unix_test.go (about) 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 dragonfly freebsd linux netbsd openbsd solaris 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 os 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 }