示例#1
0
文件: touch.go 项目: copyninja/goblin
func touch(filename string, nacc, nmod int64) (errcnt int) {
	var st syscall.Stat_t
	var ut syscall.Utimbuf

	if e := syscall.Stat(filename, &st); e != 0 {
		if e == syscall.ENOENT {

			if *cflag {
				errcnt++
				return
			}

			var fd int
			defer syscall.Close(fd)

			if fd, e = syscall.Creat(filename, 0666); e != 0 {
				fmt.Fprintf(os.Stderr, "touch: can not create %s\n", filename)
				errcnt += 1
				return
			}

			if e = syscall.Fstat(fd, &st); e != 0 {
				fmt.Fprintf(os.Stderr, "touch: can't stat %s\n", filename)
				errcnt += 1
				return
			}
		} else {
			fmt.Fprintf(os.Stderr, "touch: can't stat %s\n", filename)
			errcnt += 1
			return
		}
	}

	if *aflag {
		ut.Actime = nacc
	} else {
		ut.Actime = st.Atim.Sec
	}

	if *mflag {
		ut.Modtime = nmod
	} else {
		ut.Modtime = st.Mtim.Sec
	}

	if nulltime {
		if e := syscall.Utime(filename, nil); e != 0 {
			fmt.Fprintf(os.Stderr, "touch: unable to touch %s", filename)
			errcnt += 1
		}
	} else {
		if e := syscall.Utime(filename, &ut); e != 0 {
			fmt.Fprintf(os.Stderr, "touch: unable to touch %s", filename)
			errcnt += 1
		}
	}

	return
}
示例#2
0
func main() {
	flag.Parse()

	if flag.NArg() < 1 {
		usage()
	}

	for i := 0; i < flag.NArg(); i++ {
		var name = flag.Arg(i)
		var tb syscall.Utimbuf
		tb.Actime = (int32)(*newTime)
		tb.Modtime = (int32)(*newTime)
		var e = syscall.Utime(name, &tb)

		if (e != 0) && *create {
			fmt.Fprintf(
				os.Stderr,
				"touch: cannot touch `%s'\n",
				name)
			os.Exit(1)
		}

		f, err := os.Open(name, os.O_CREAT, 0666)
		if err != nil {
			fmt.Fprintf(
				os.Stderr,
				"touch: cannot touch `%s': %s\n",
				name,
				err.String())
			os.Exit(1)
		}
		f.Close()

		e = syscall.Utime(name, &tb)
		if e != 0 {
			fmt.Fprintf(
				os.Stderr,
				"touch: cannot touch `%s'\n",
				name)
			os.Exit(1)
		}
	}

	os.Exit(0)
}
示例#3
0
// TestPutTouch
//     Test that when applying PUT to a block that already exists,
//     the block's modification time is updated.
func TestPutTouch(t *testing.T) {
	v := TempUnixVolume(t, false, false)
	defer _teardown(v)

	if err := v.Put(TEST_HASH, TEST_BLOCK); err != nil {
		t.Error(err)
	}

	// We'll verify { t0 < threshold < t1 }, where t0 is the
	// existing block's timestamp on disk before Put() and t1 is
	// its timestamp after Put().
	threshold := time.Now().Add(-time.Second)

	// Set the stored block's mtime far enough in the past that we
	// can see the difference between "timestamp didn't change"
	// and "timestamp granularity is too low".
	{
		oldtime := time.Now().Add(-20 * time.Second).Unix()
		if err := syscall.Utime(v.blockPath(TEST_HASH),
			&syscall.Utimbuf{oldtime, oldtime}); err != nil {
			t.Error(err)
		}

		// Make sure v.Mtime() agrees the above Utime really worked.
		if t0, err := v.Mtime(TEST_HASH); err != nil || t0.IsZero() || !t0.Before(threshold) {
			t.Errorf("Setting mtime failed: %v, %v", t0, err)
		}
	}

	// Write the same block again.
	if err := v.Put(TEST_HASH, TEST_BLOCK); err != nil {
		t.Error(err)
	}

	// Verify threshold < t1
	t1, err := v.Mtime(TEST_HASH)
	if err != nil {
		t.Error(err)
	}
	if t1.Before(threshold) {
		t.Errorf("t1 %v must be >= threshold %v after v.Put ",
			t1, threshold)
	}
}
示例#4
0
func utimeHandle(tConn *TcfsConn, msgbuf []byte) {
	rootdir := tConn.RootDir
	buf := tConn.Buf
	atime := binary.BigEndian.Uint64(msgbuf[0:8])
	mtime := binary.BigEndian.Uint64(msgbuf[8:16])
	fixpath := rootdir + string(msgbuf[16:])
	err := syscall.Utime(fixpath, &syscall.Utimbuf{int64(atime), int64(mtime)})
	if err != nil {
		log.Print("Can't create", err)
		binary.BigEndian.PutUint32(buf[0:4], 4)
		ret := -13
		binary.BigEndian.PutUint32(buf[4:8], uint32(ret))
		tConn.Write(buf[:8])
	} else {
		binary.BigEndian.PutUint32(buf[0:4], 4)
		binary.BigEndian.PutUint32(buf[4:8], 0)
		tConn.Write(buf[:8])
	}
}
示例#5
0
文件: srcpkg.go 项目: juster/maw
// extractFile is a helper function for Extract which extracts a file and
// matches the new file's mtime and atime to the original archive entry.
func (srcpkg *SrcPkg) extractFile(newpath string, hdr *tar.Header) os.Error {
	file, err := os.Create(newpath)
	if err != nil {
		return err
	}

	_, err = io.Copy(file, srcpkg.reader)
	file.Close()
	if err != nil {
		return err
	}

	ubuf := &syscall.Utimbuf{int32(hdr.Atime), int32(hdr.Mtime)}
	if errno := syscall.Utime(newpath, ubuf); errno != 0 {
		return os.NewError("Failed to set modification time for " + newpath)
	}

	return nil
}
示例#6
0
// Touch sets the timestamp for the given locator to the current time
func (v *UnixVolume) Touch(loc string) error {
	if v.readonly {
		return MethodDisabledError
	}
	p := v.blockPath(loc)
	f, err := os.OpenFile(p, os.O_RDWR|os.O_APPEND, 0644)
	if err != nil {
		return err
	}
	defer f.Close()
	if v.locker != nil {
		v.locker.Lock()
		defer v.locker.Unlock()
	}
	if e := lockfile(f); e != nil {
		return e
	}
	defer unlockfile(f)
	now := time.Now().Unix()
	utime := syscall.Utimbuf{now, now}
	return syscall.Utime(p, &utime)
}
示例#7
0
func (v *TestableUnixVolume) TouchWithDate(locator string, lastPut time.Time) {
	err := syscall.Utime(v.blockPath(locator), &syscall.Utimbuf{lastPut.Unix(), lastPut.Unix()})
	if err != nil {
		v.t.Fatal(err)
	}
}