Example #1
0
// Write an event into the Wtmp file. An error is returned if the event
// cannot be appended to the Wtmp file.
func WriteWtmp(user, id string, pid int32, utype int16, line string) error {

	u := new(Utmp)
	u.Time.GetTimeOfDay()
	u.Pid = pid
	u.Type = utype
	_ = copy(u.User[:], []byte(user))
	_ = copy(u.Id[:], []byte(id))
	_ = copy(u.Line[:], []byte(line))

	name := new(syscall.Utsname)
	if err := syscall.Uname(name); err == nil {
		_ = copy(u.Host[:], general.Int8ToByte(name.Release[:]))
	}

	return u.UpdWtmp(WtmpFile)
}
Example #2
0
// Write an event into the Utmp file. An error is returned if the event
// cannot be written to the Utmp file.
func WriteUtmp(user, id string, pid int32, utype int16, line, oldline string) error {

	u := new(Utmp)
	u.Time.GetTimeOfDay()
	u.Pid = pid
	u.Type = utype
	_ = copy(u.User[:], []byte(user))
	_ = copy(u.Id[:], []byte(id))
	_ = copy(u.Line[:], []byte(line))

	name := new(syscall.Utsname)
	if err := syscall.Uname(name); err == nil {
		_ = copy(u.Host[:], general.Int8ToByte(name.Release[:]))
	}

	file, lk, err := SafeOpen(UtmpFile)
	if err != nil {
		goto done
	}

	if utype == DeadProcess {

		_ = SetUtEnt(file)
		if st, r := u.GetUtid(file); r > -1 {
			_ = copy(u.Line[:], st.Line[:])
			if oldline != "" {
				_ = copy([]byte(oldline), st.Line[:])
			}
		}
	}

	err = SetUtEnt(file)
	if err != nil {
		goto done
	}

	err = u.PutUtLine(file)

done:
	if file != nil {
		SafeClose(file, lk)
	}
	return err
}
Example #3
0
// recursively walk through the named directory `dir` until the correct device
// is found.
// Directories in []searchDevs are automatically skipped
func checkDirs(dir string) (string, error) {
	var (
		rs      string
		nameBuf = make([]byte, 256)
		dirBuf  = make([]syscall.Dirent, 256)
	)

	fi, err := os.Open(dir)
	if err != nil {
		return "", err
	}
	defer fi.Close()

	err = dirent.ReadDir(int(fi.Fd()), -1, &dirBuf)
	if err != nil && err != io.EOF {
		return "", err
	}

	for _, v := range dirBuf {
		// quickly skip most entries
		if v.Ino != Stat.Ino {
			continue
		}

		_ = copy(nameBuf, general.Int8ToByte(v.Name[:]))
		name := path.Join(dir, string(nameBuf[:general.Clen(nameBuf)]))

		// Directories to skip
		if name == "/dev/stderr" ||
			name == "/dev/stdin" ||
			name == "/dev/stdout" ||
			(len(name) >= 8 &&
				name[0:8] == "/dev/fd/") {
			continue
		}

		// We have to stat the file to determine its Rdev
		fstat := new(syscall.Stat_t)
		err = syscall.Stat(name, fstat)
		if err != nil {
			continue
		}

		// file mode sans permission bits
		fmode := os.FileMode(fstat.Mode)
		if fmode.IsDir() {
			rs, err = checkDirs(name)
			if err != nil {
				continue
			}

			return rs, nil
		}

		if fmode&os.ModeCharDevice == 0 &&
			fstat.Ino == Stat.Ino &&
			fstat.Rdev == Stat.Rdev {
			return name, nil
		}

	}

	return "", ErrNotFound
}