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// 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.
// +build darwin freebsd linux openbsd
package os_test
import (
. "os"
"syscall"
"testing"
)
func checkUidGid(t *testing.T, path string, uid, gid int) {
dir, err := Stat(path)
if err != nil {
t.Fatalf("Stat %q (looking for uid/gid %d/%d): %s", path, uid, gid, err)
}
sys := dir.(*FileStat).Sys.(*syscall.Stat_t)
if int(sys.Uid) != uid {
t.Errorf("Stat %q: uid %d want %d", path, sys.Uid, uid)
}
if int(sys.Gid) != gid {
t.Errorf("Stat %q: gid %d want %d", path, sys.Gid, gid)
}
}
func TestChown(t *testing.T) {
// Chown is not supported under windows or Plan 9.
// Plan9 provides a native ChownPlan9 version instead.
if syscall.OS == "windows" || syscall.OS == "plan9" {
return
}
// Use TempDir() to make sure we're on a local file system,
// so that the group ids returned by Getgroups will be allowed
// on the file. On NFS, the Getgroups groups are
// basically useless.
f := newFile("TestChown", t)
defer Remove(f.Name())
defer f.Close()
dir, err := f.Stat()
if err != nil {
t.Fatalf("stat %s: %s", f.Name(), err)
}
// Can't change uid unless root, but can try
// changing the group id. First try our current group.
gid := Getgid()
t.Log("gid:", gid)
if err = Chown(f.Name(), -1, gid); err != nil {
t.Fatalf("chown %s -1 %d: %s", f.Name(), gid, err)
}
sys := dir.(*FileStat).Sys.(*syscall.Stat_t)
checkUidGid(t, f.Name(), int(sys.Uid), gid)
// Then try all the auxiliary groups.
groups, err := Getgroups()
if err != nil {
t.Fatalf("getgroups: %s", err)
}
t.Log("groups: ", groups)
for _, g := range groups {
if err = Chown(f.Name(), -1, g); err != nil {
t.Fatalf("chown %s -1 %d: %s", f.Name(), g, err)
}
checkUidGid(t, f.Name(), int(sys.Uid), g)
// change back to gid to test fd.Chown
if err = f.Chown(-1, gid); err != nil {
t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err)
}
checkUidGid(t, f.Name(), int(sys.Uid), gid)
}
}
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