sleep : /usr/src/bin/sleep/sleep.c /usr/include/unistd.h \
  /usr/include/sys/cdefs.h /usr/include/sys/types.h \
  /usr/include/machine/endian.h /usr/include/machine/ansi.h \
  /usr/include/machine/types.h /usr/include/sys/unistd.h \
  /usr/include/sys/time.h /usr/include/time.h /usr/include/stdio.h \
  /usr/include/stdlib.h 
