/sources/plan9/sys/src/cmd/diff/
       794 2005-01-26 diff.h
      1895 2008-09-27 diffdir.c
      6599 2005-04-28 diffio.c
      8825 2005-04-21 diffreg.c
      4346 2008-09-27 main.c
       141 1999-12-12 mkfile