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package autofile
import (
"io/ioutil"
"os"
"sync/atomic"
"syscall"
"testing"
"time"
"github.com/stretchr/testify/require"
cmn "github.com/tendermint/tendermint/libs/common"
"github.com/tendermint/tendermint/libs/errors"
)
func TestSIGHUP(t *testing.T) {
// First, create an AutoFile writing to a tempfile dir
file, err := ioutil.TempFile("", "sighup_test")
require.NoError(t, err)
err = file.Close()
require.NoError(t, err)
name := file.Name()
// Here is the actual AutoFile
af, err := OpenAutoFile(name)
require.NoError(t, err)
// Write to the file.
_, err = af.Write([]byte("Line 1\n"))
require.NoError(t, err)
_, err = af.Write([]byte("Line 2\n"))
require.NoError(t, err)
// Move the file over
err = os.Rename(name, name+"_old")
require.NoError(t, err)
// Send SIGHUP to self.
oldSighupCounter := atomic.LoadInt32(&sighupCounter)
syscall.Kill(syscall.Getpid(), syscall.SIGHUP)
// Wait a bit... signals are not handled synchronously.
for atomic.LoadInt32(&sighupCounter) == oldSighupCounter {
time.Sleep(time.Millisecond * 10)
}
// Write more to the file.
_, err = af.Write([]byte("Line 3\n"))
require.NoError(t, err)
_, err = af.Write([]byte("Line 4\n"))
require.NoError(t, err)
err = af.Close()
require.NoError(t, err)
// Both files should exist
if body := cmn.MustReadFile(name + "_old"); string(body) != "Line 1\nLine 2\n" {
t.Errorf("Unexpected body %s", body)
}
if body := cmn.MustReadFile(name); string(body) != "Line 3\nLine 4\n" {
t.Errorf("Unexpected body %s", body)
}
}
// Manually modify file permissions, close, and reopen using autofile:
// We expect the file permissions to be changed back to the intended perms.
func TestOpenAutoFilePerms(t *testing.T) {
file, err := ioutil.TempFile("", "permission_test")
require.NoError(t, err)
err = file.Close()
require.NoError(t, err)
name := file.Name()
// open and change permissions
af, err := OpenAutoFile(name)
require.NoError(t, err)
err = af.file.Chmod(0755)
require.NoError(t, err)
err = af.Close()
require.NoError(t, err)
// reopen and expect an ErrPermissionsChanged as Cause
af, err = OpenAutoFile(name)
require.Error(t, err)
if e, ok := err.(*errors.ErrPermissionsChanged); ok {
t.Logf("%v", e)
} else {
t.Errorf("unexpected error %v", e)
}
err = af.Close()
require.NoError(t, err)
}