Re: Bug#38062: hurd: MAKEDEV does only understand 9 partitions

[Roland McGrath <roland@gnu.org>]

I have hacked on the MAKEDEV script.  It is now more flexible is disk
device/slice/partition names it will accept.  I've also fixed the
"/dev/./console" bug.  This script no longer allows directory names in the
arguments.  To run it someplace other than /dev, you need to do:

	# cd /otherdisk/dev
	# MAKEDEV --devdir=/dev std

It always makes devices in the current directory.  Some devices such as
terminal devices (including console) need to embed the full name of the
device file in the translator setting (this is the name of the device file
as it will be used in the running system).  The --devdir option controls
what goes there--it defaults to `pwd`, so make sure you have the right
directory for when these devices will actually be used.

This version is checked in to cvs in AFS, but is not in the anoncvs mirror yet.
I attach the script here (sutils/MAKEDEV.sh); you can just install this
directly as /sbin/MAKEDEV (/dev/MAKEDEV is a symlink to that).

#!/bin/sh
#
# Make standard devices
#

PATH=/bin:/usr/bin

ECHO=:		# Change to "echo" to echo commands.
EXEC=""		# Change to ":" to suppress command execution.
DEVDIR=`pwd`	# Reset below by -D/--devdir command line option.

while :; do
  case "$1" in
    --help|"-?")
      echo "\
Usage: $0 [OPTION...] DEVNAME...
Make filesystem nodes for accessing standard system devices

  -D, --devdir=DIR           Use DIR when a device node name must be
                             embedded in a translator; default is the cwd
  -n, --dry-run              Don't actually execute any commands
  -v, --verbose              Show what commands are executed to make the devices
  -?, --help                 Give this help list
      --usage                Give a short usage message
  -V, --version              Print program version"
      exit 0;;
    --devdir)   DEVDIR="$2"; shift 2;;
    --devdir=*) DEVDIR="`echo "$1" | sed 's/^--devdir=//'`"; shift 1;;
    -D)         DEVDIR="$2"; shift 2;;
    -D*)        DEVDIR="`echo "$1" | sed 's/^-D//'`"; shift 1;;
    --verbose|-v) ECHO=echo; shift;;
    --dry-run|-n) EXEC=:; shift;;
    -nv|-vn)      ECHO=echo; EXEC=:; shift;;
    --usage)
      echo "Usage: $0 [-V?] [-D DIR] [--help] [--usage] [--version] [--devdir=DIR] DEVNAME..."
      exit 0;;
    --version|-V)
      echo "STANDARD_HURD_VERSION_MAKEDEV_"; exit 0;;
    -*)
      echo 1>&2 "$0: unrecognized option \`$1'"
      echo 1>&2 "Try \`$0 --help' or \`$0 --usage' for more information";
      exit 1;;
    *)
      break;;
  esac
done

case  "$#" in 0)
  echo 1>&2 "Usage: $0 [OPTION...] DEVNAME..."
  echo 1>&2 "Try \`$0 --help' or \`$0 --usage' for more information"
  exit 1;;
esac

function cmd {
  eval $ECHO "$@"
  eval $EXEC "$@"
}

function st {
  local NODE="$1"
  local OWNER="$2"
  local PERM="$3"
  shift 3
  if cmd settrans -cg "$NODE"; then
    cmd chown "$OWNER" "$NODE"
    cmd chmod "$PERM" "$NODE"
    cmd settrans "$NODE" "$@"
  fi
}

function lose {
  local line
  for line; do
    echo 1>&2 "$0: $line"
  done
  exit 1
}

function mkdev {
  local I
  for I; do
    case "$I" in
      /* | */*)
        lose "Device names cannot contain directories" \
	     "Change to target directory and run $0 from there."
	;;

      std)
	mkdev console tty null zero fd time
	;;
      console|tty[0-9][0-9a-f]|tty[0-9a-f]|com[0-9])
	st $I root 600 /hurd/term ${DEVDIR}/$I device $I;;
      null)
	st $I root 666 /hurd/null;;
      zero)
	st $I root 666 /hurd/storeio -Tzero;;
      tty)
	st $I root 666 /hurd/magic tty;;
      fd)
	st $I root 666 /hurd/magic fd
	cmd ln -f -s fd/0 stdin
	cmd ln -f -s fd/1 stdout
	cmd ln -f -s fd/2 stderr
	;;
      'time')
	st $I root 644 /hurd/storeio time ;;

      # ptys
      [pt]ty[pqrstuvwxyzPQRST]?)
	# Make one pty, both the master and slave halves.
	local id="${I:3}"
	st pty$id root 640 /hurd/term ${DEVDIR}/pty$id \
				      pty-master ${DEVDIR}/tty$id
	st tty$id root 640 /hurd/term ${DEVDIR}/tty$id \
				      pty-slave ${DEVDIR}/pty$id
	;;
      [pt]ty[pqrstuvwxyzPQRST])
	# Make a bunch of ptys.
	mkdev ${I}0 ${I}1 ${I}2 ${I}3 ${I}4 ${I}5 ${I}6 ${I}7
	mkdev ${I}8 ${I}9 ${I}a ${I}b ${I}c ${I}d ${I}e ${I}f
	;;

      fd*|mt*)
	st $I root 640 /hurd/storeio $I
	;;

      [hrsc]d*)
        local n="${I#?d}"
	local major="${n%%[!0-9]*}"
	if [ -z "$major" ]; then
	  lose "$I: Invalid device name: must supply a device number"
	fi
	local minor="${n##$major}"
	case "$minor" in
	'') ;;		# Whole disk
	[a-z]) ;;	# BSD partition syntax, no slice syntax
	s[1-9]*)	# Slice syntax.
	  local slicestuff="${minor#s}"
	  local slice="${slicestuff%%[!0-9]*}"
	  local rest="${slicestuff##$slice}"
	  case "$slice" in
	  [1-9] | [1-9][0-9]) ;;
	  *)
	    lose "$I: Invalid slice number \`$slice'"
	    ;;
	  esac
	  case "$rest" in
	  '') ;;	# Whole slice
	  [a-z]) ;;	# BSD partition after slice
	  *)
	    lose "$I: Invalid partition \`$rest'"
	    ;;
	  esac
	  ;;
	*)
	  lose "$I: Invalid slice or partition syntax"
	  ;;
	esac

	# The device name passed all syntax checks, so finally use it!
	st $I root 640 /hurd/storeio $I
	;;

      *)
	lose "$I: Unknown device name"
	;;
    esac
  done
}

mkdev "$@"