_c_

  #! /bin/sh 
  # Almquist clone, not Bash
 
  case $# in
  0)
  exec grep -a . proc/[0-9]*/cmdline \
  |exec tr '\000' '\040' \
  |exec sed '
             /grep -a .* proc/d;
             #parent: '"$$"';
             s/proc./ /;
             s/\/cmdline:/ /;
 ' \
  |exec less
  ;;
 
  *)
  exec grep -a . proc/[0-9]*/cmdline \
  |exec tr '\000' '\040' \
  |exec grep $@ \
  |exec sed '
             /grep '"$@"'/d;
             s/proc./ /;
             s/\/cmdline:/ /;
 ' \
  |exec less
  esac