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$ halcmd help save
save [type] [filename]
  Prints HAL state to 'filename' (or stdout), as a series
  of HAL commands.  State can later be restored by using
  "halcmd -f filename".
  Type can be 'comp', 'sig', 'link[a]', 'net[a]', 'param',
  or 'thread'.  ('linka' and 'neta' show arrows for pin
  direction.)  If 'type' is omitted or 'all', does the
  equivalent of 'comp', 'sig', 'link', 'param', and 'thread'.