MFC r207453:

MFC r207453:

  Remove WNOHANG flag from wait3().

  Because script(1) now reliably terminates when the TTY is closed, it may
  be the case that the call to wait3() occurs just before the child
  process exits. This causes error codes to be ignored.

  Just change script(1) to use waitpid() instead of wait3(). This makes it
  more portable and prevents the need for a loop, since waitpid() only
  returns a specified process.

PR:           bin/146189
Tested by:    amdmi3@, older version

git-svn-id: svn://svn.freebsd.org/base/stable/8@208070 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f