/sources/plan9/sys/src/cmd/ip/ppp/
      5353 2002-03-03 block.c
     11774 2003-12-30 compress.c
        50 1999-12-12 doclient
        91 1999-12-12 doserve
       152 1999-12-12 dotest
      2328 2005-09-01 ipaux.c
       352 2003-09-19 mkfile
     16624 2002-03-03 mppc.c
     60138 2012-08-07 ppp.c
      8284 2004-08-08 ppp.h
      3011 2003-02-18 testppp.c
      5962 2002-03-03 thw.c
      8004 2002-03-03 thwack.c
      2052 2000-07-27 thwack.h
      5883 2002-03-03 unthwack.c