#!/bin/bash

MAKEDEV_VERSION=1.7

# This script is originally taken from Slackware 7.1 and modified for
#  the Linux From Scratch Project (http://www.linuxfromscratch.org/) by
#  Marc Heerdink <marc_heerdink@softhome.net>
#
# Versions 1.1 onwards modified for LFS by Mark Hymers
# <markh@linuxfromscratch.org>

#
# Changelog
#

# Version 1.1
#	-- Modified script so sg devices were created properly.  They were
#	being created as block devices instead of the proper character
#	ones.

# Version 1.2
#	-- Added new generic-nopty option for those using /dev/pts to
#	avoid creating pty[p-za-e][0-9a-f] and tty[p-za-e][0-9a-f]
#	-- Changed generic option to create hda-hdh instead of just
#	hda-hdd
#	-- Changed MAXVT to only create 32 VTs by default instead of 63

# Version 1.3
#	-- Changed creation of framebuffer devices (fb0-fb7) to 29,[0-7]
#	instead of the old 0,32,etc. sequence.  Support for the old
#	sequence will be removed in the 2.5 series.
#	-- Fixed typo in smpte* device creation (they were being created
#	as smtpe instead of smpte...)

# Version 1.4
#	-- Applied Matthias Benkmann's new patch to allow MAKEDEV to be used
#	even when glibc isn't installed by manually resolving
#	user and group names to ids if chown name.group doesn't work.

# Version 1.5
#  -- Changed the symlink /dev/ram --> /dev/ram1 to /dev/ram --> /dev/ram0

# Version 1.6
#  -- Removed the "update" target as we don't use it and it means
#  that MAKEDEV doesn't need proc mounted to work.
#  -- Make the -V option work properly
#  -- Add long (GNU-style) options and add the -h|--help option.
#  -- When we fallback to parsing /etc/{passwd,group}, make sure the
#  files actually exist first!
#  -- Change !#/bin/sh to #!/bin/bash as it doesn't run on all shells which
#  may be installed as /bin/sh

# Version 1.7
#  -- Give vcs a fallback major number (7) as the /proc processing code
#  has been removed.


# Kernel version 2.4.9 (2.4.x series)

# These are the device classes. Each device falls in it's own class. The
#  parameters to the chmod and chown commands for a specific class are
#  defined here. The permissions will be changed immediately after the
#  device is created.

  public="root root    0666"
 private="root root    0600"
  system="root sys     0660"
    kmem="root kmem    0640"
     tty="root tty     0666"
    cons="root tty     0622"
     vcs="root root    0600"
 dialout="root dialout 0660"
   mouse="root root    0660"
 printer="root lp      0660"
  floppy="root floppy  0660"
    disk="root disk    0660"
    scsi="root disk    0660"
   cdrom="root disk    0660"
    tape="root tape    0660"
   audio="root audio   0660"
   video="root root    0660"
   ibcs2="root root    0666"
 scanner="root root    0666"
    coda="root root    0600"
   ipsec="root root    0200"
readable="root root    0444"

# Maximum number of Virtual Terminals to create.
MAXVT=32

# Default major numbers.
major_ide0=3
major_ide1=22
major_ide2=33
major_ide3=34

major_sd=8
major_sr=11
major_sg=21

major_lp=6
major_loop=7

procfs=/proc

opt_v=
opt_d=
opt_n=
opt_H=
opt_V=

while [ "$#" -ge "1" ]; do
	case $1 in
		--)	              shift; break ;;
		-v|--verbose)     shift; opt_v=1 ;;
		-d|--delete)      shift; opt_d=1 ;;
		-n|--null)	      shift; opt_n=1; opt_v=1 ;;
		-V|--version)	  shift; opt_V=1 ;;
		-h|--help) 	      shift; opt_h=1 ;;
		-*)	              echo "$0: unknown flag \"$1\"" >&2; exit 1 ;;
		*)	              break ;;
	esac
done

if [ "$opt_V" ]; then
	echo "MAKEDEV-$MAKEDEV_VERSION"
	echo
	echo "Based on the MAKEDEV script from Slackware 7.1"
	echo "Originally modified for the LinuxFromScratch Project"
	echo "(http://www.linuxfromscratch.org/)"
	echo "by Marc Heerdink <marc_heerdink@softhome.net>"
	echo
	echo "Maintained for LinuxFromScratch from Version 1.1 onwards"
	echo "by Mark Hymers <markh@linuxfromscratch.org>"
	echo
	echo "Please report all problems to the maintainer"
	exit 0
fi

if [ "$opt_h" ]; then
	echo "Usage: MAKEDEV [OPTION] DEVICE|DEVICE-GROUP"
	echo "Create device files for use in Linux"
	echo

	echo "-d, --delete   delete specified devices"
	echo "-h, --help     display this help and exit"
	echo "-n, --null     don't perform the action, just print what would be done"
	echo "-V, --version  display version information and exit"
	echo "-v, --verbose  be more verbose in the output "
	echo

	echo "Devices can be specified individually or as a group. Examples:"
	echo "generic        creates most generally required devices"
	echo "generic-nopty  as generic but no pty's created (for use with devpts"
	echo
	echo "Please report bugs to the maintainer (see --version option)"
	exit 0
fi

opts="${opt_n:+-n} ${opt_v:+-v} ${opt_d:+-d}"

#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#

# Test if groups and users are resolved automatically and install functions to 
# resolve manually if not - By Matthias Benkmann 

if [ "`id -gn root 2>/dev/null`" != "root" ]; then
	echo 1>&2 'NOTICE: Resolving user/group names manually using /etc/group and /etc/passwd'

	if [ -f /etc/passwd ]; then
	 getuser() 
	 {
	  line=`grep ^$1: /etc/passwd` || { echo $1 ; return 1 ;}
	  echo "$line" | cut -f 3 -d :  
	 }
	else
 	 echo "/etc/passwd does not exist - please create it!"
	 exit 1
	fi

	if [ -f /etc/group ]; then
	 getgid() 
	 {
 	  line=`grep ^$1: /etc/group` || { echo $1 ; return 1 ;}
	  echo "$line" | cut -f 3 -d :
	 }
	else
	 echo "/etc/group does not exist - please create it!"
	 exit 1
	fi
else
	getuser() { echo $1 ;}
	getgid() { echo $1 ;}
fi

makedev () {
	if [ "$opt_v" ]; then
		if [ "$opt_d" ]; then
			echo "delete $1"
		else
			echo "create $1	$2 $3 $4 $5:$6 $7"
		fi
	fi
	if [ ! "$opt_n" ]; then
		if [ "$opt_d" ]; then
			rm -f $1
		else
			rm -f $1-
			mknod $1- $2 $3 $4 &&
			chown `getuser $5`:`getgid $6` $1- &&
			chmod $7 $1- &&
			mv $1- $1
			fi
	fi
}

symlink () {
	if [ "$opt_v" ]; then
		if [ "$opt_d" ]; then
			echo "delete $1"
		else
			echo "create $1	-> $2"
		fi
	fi
	[ ! "$opt_n" ] && rm -f $1 &&
	[ ! "$opt_d" ] && ln -s $2 $1
}

math () {
	eval echo "\$(($*))"
}

index () {
	eval "I=\${1%$2*}"
	eval echo "\${#I}"
}

suffix () {
	eval echo "\${1#$2}"
}

strip () {
	eval echo "\${1% $2 *} \${1#* $2 }"
}

first () {
	eval echo "\${1:0:1}"
}

second () {
	eval echo "\${1:1:1}"
}

#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#---#

Major () {
	device=$2
	if [ "$opt_d" ]; then
		echo -1
	else
		eval echo \${major_$1:-\${device:?\"unknown major number for $1\"}}
	fi
}

cvt () {
	while [ "$#" -ne "0" ]; do
		case "$1" in
			mem|tty|ttyp|cua|cub) ;;
			hd)	(for d in a b c d e f g h ; do
					echo -n hd$d " "
				 done) ; echo
				;;
			ide0)	echo hda hdb ;;
			ide1)	echo hdc hdd ;;
			ide2)	echo hde hdf ;;
			ide3)	echo hdg hdh ;;
			sd)	echo sda sdb sdc sdd ;;
			sg)	echo sg ;;
			sr)	echo scd0 ;;
			st)	echo st0 ;;
			xd)	echo xda xdb ;;
			ad)	echo ada adb ;;
			fd)	echo fd0 fd1 ;;
			lp)	echo lp ;;
			mt)	echo ftape ;;
			loop)	echo loop ;;
			md)	echo md ;;
			ibcs2)	echo ibcs2 ;;
			tpqic02)	echo qic ;;
			sound)		echo audio ;;
			logiscan)	echo logiscan ;;
			ac4096)		echo ac4096 ;;
			hw)	echo helloworld ;;
			sbpcd | sbpcd[123])	echo $1 ;;
			joystick)	echo js ;;
			apm_bios)	echo apm ;;
			dcf)		echo dcf ;;
			aztcd)		echo aztcd ;;
			pcmcia)	;; # taken care of by its own driver
			ttyC)	echo cyclades ;;
			isdn)	echo isdnmodem isdnbri dcbri ;;
			vcs)	;;
			pty)	echo pty ;;
			misc)	echo misc ;;
			fb)	echo fb ;;
			netlink)	echo netlink ;;
			hamradio)	echo hamradio ;;
			snd)	;;
			ptm)	;;
			pts)	;;
			ttyS)	echo ttyS0 ttyS1 ttyS2 ttyS3 ;;
			*)	echo "$0: don't know what \"$1\" is" >&2 ;;
		esac
		shift
	done
}

for arg; do
	case $arg in
	generic|generic-nopty)
		$0 $opts std
		$0 $opts fd
		if [ $arg = "generic" ]; then $0 $opts pty; fi;
		if [ $arg = "generic-nopty" ]; then $0 $opts ptmx; fi;
		$0 $opts console
		$0 $opts ttyS0 ttyS1 ttyS2 ttyS3
		$0 $opts lp
		$0 $opts parport
		$0 $opts busmice
		$0 $opts fb
		$0 $opts ram
		$0 $opts loop
		$0 $opts fd0 fd1
		$0 $opts hda hdb hdc hdd hde hdf hdg hdh
		$0 $opts sda sdb sdc sdd
		$0 $opts sg0 sg1 sg2 sg3
		$0 $opts scd0 scd1 scd2 scd3
		$0 $opts audio
		$0 $opts rtc
		$0 $opts ppp
		;;
	std)
		makedev mem  c 1 1 $kmem
		makedev kmem c 1 2 $kmem
		makedev null c 1 3 $public
		makedev port c 1 4 $kmem
		makedev zero c 1 5 $public
		symlink core $procfs/kcore
		makedev full c 1 7 $public
		makedev random c 1 8 $readable
		makedev urandom c 1 9 $readable
		makedev aio c 1 10 $readable
		makedev tty  c 5 0 $tty
		;;
	ram)
		for i in 0 1 2 3; do
			makedev ram$i  b 1 $i $disk
		done
		ln -sf ram0 ram
		;;
	console)
		major=`Major vcs 7`
		makedev tty0 c 4 0 $cons
		makedev console c 5 1 $cons
		[ "$major" ] && makedev vcs0 c $major 0 $vcs
		[ "$major" ] && makedev vcsa c $major 128 $vcs

		line=1
		while [ $line -le $MAXVT -a $line -le 63 ]; do
			makedev tty$line c 4 $line $tty
			[ "$major" ] && makedev vcs$line c $major $line $vcs
			[ "$major" ] && makedev vcsa$line c $major `math $line + 128` $vcs
			line=`math $line + 1`
		done
		;;
	fd)
		symlink fd     $procfs/self/fd
		symlink stdin  fd/0
		symlink stdout fd/1
		symlink stderr fd/2
		;;
	fd[0-7])
		major=`Major fd 2` || continue
		base=`suffix $arg fd`
		if [ $base -ge 4 ]
		then
			base=`math $base + 124`
		fi
		makedev ${arg} b $major $base $floppy
		makedev ${arg}d360  b $major `math $base +  4` $floppy
		makedev ${arg}h1200 b $major `math $base +  8` $floppy
		makedev ${arg}u360  b $major `math $base + 12` $floppy
		makedev ${arg}u720  b $major `math $base + 16` $floppy
		makedev ${arg}h360  b $major `math $base + 20` $floppy
		makedev ${arg}h720  b $major `math $base + 24` $floppy
		makedev ${arg}u1440 b $major `math $base + 28` $floppy
		makedev ${arg}u2880 b $major `math $base + 32` $floppy
		makedev ${arg}CompaQ b $major `math $base + 36` $floppy
		makedev ${arg}h1440 b $major `math $base + 40` $floppy
		makedev ${arg}u1680 b $major `math $base + 44` $floppy
		makedev ${arg}h410  b $major `math $base + 48` $floppy
		makedev ${arg}u820  b $major `math $base + 52` $floppy
		makedev ${arg}h1476 b $major `math $base + 56` $floppy
		makedev ${arg}u1722 b $major `math $base + 60` $floppy
		makedev ${arg}h420  b $major `math $base + 64` $floppy
		makedev ${arg}u830  b $major `math $base + 68` $floppy
		makedev ${arg}h1494 b $major `math $base + 72` $floppy
		makedev ${arg}u1743 b $major `math $base + 76` $floppy
		makedev ${arg}h880  b $major `math $base + 80` $floppy
		makedev ${arg}u1040 b $major `math $base + 84` $floppy
		makedev ${arg}u1120 b $major `math $base + 88` $floppy
		makedev ${arg}h1600 b $major `math $base + 92` $floppy
		makedev ${arg}u1760 b $major `math $base + 96` $floppy
		makedev ${arg}u1920 b $major `math $base + 100` $floppy
		makedev ${arg}u3200 b $major `math $base + 104` $floppy
		makedev ${arg}u3520 b $major `math $base + 108` $floppy
		makedev ${arg}u3840 b $major `math $base + 112` $floppy
		makedev ${arg}u1840 b $major `math $base + 116` $floppy
		makedev ${arg}u800  b $major `math $base + 120` $floppy
		makedev ${arg}u1600 b $major `math $base + 124` $floppy
		;;
	hamradio)
		$0 scc
		$0 bc
		;;
	scc)
		for unit in 0 1 2 3 4 5 6 7 
		do
			makedev scc$unit c 34 $unit $system
		done
		;;
	bc)	
		for unit in 0 1 2 3
		do
			makedev bc$unit c 51 $unit $system
		done
		;;
	nvram)
		makedev nvram c 10 144 $kmem
		;;
	tty[1-9]|tty[1-5][0-9]|tty[6][0-3])
		line=`suffix $arg tty`
		makedev tty$line c 4 $line $tty
		;;
	ttyS[0-9]|ttyS[1-5][0-9]|ttyS[6][0-3])
		line=`suffix $arg ttyS`
		minor=`math 64 + $line`
		makedev ttyS$line c 4 $minor $dialout
		;;
	pty[a-ep-z])
		bank=`suffix $arg pty`
		base=`index pqrstuvwxyzabcde $bank`
		base=`math $base \* 16`
		for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f
		do
			j=`index 0123456789abcdef $i`
			makedev pty$bank$i c 2 `math $base + $j` $tty
			makedev tty$bank$i c 3 `math $base + $j` $tty
		done
		;;
	pty)
		ptysufs=""
		for i in p q r s t u v w x y z a b c d e
		do
			ptysufs="$ptysufs pty$i"
		done
		$0 $opts $ptysufs ptmx
		;;
	ptmx)
		# master pty multiplexer for 2.1 kernels
		makedev ptmx c 5 2 $tty
		;;
	cyclades|ttyC)
		major1=`Major ttyC 19` || continue
		#major2=`Major cub 20` || continue
		for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 \
                         16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
		do
			makedev ttyC$i c $major1 $i $tty
			#makedev cub$i c $major2 $i $dialout
		done
		;;
	stallion|ttyE)
		major1=`Major ttyE 24` || continue
		#major2=`Major cue 25` || continue
		majorc=28
		minor=0
		until [ $minor -gt 256 ]
		do
			makedev ttyE$minor c $major1 $minor $dialout
			#makedev cue$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		for i in 0 1 2 3
		do
			makedev staliomem$i c $majorc $i $private
		done
		;;
	chase|ttyH)
		major1=`Major ttyH 17` || continue
		#major2=`Major cuh 18` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyH$minor c $major1 $minor $dialout
			#makedev cuh$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	rocketport|ttyR)
		major1=`Major ttyR 46` || continue
		#major2=`Major cur 47` || continue
		minor=0
		until [ $minor -gt 64 ] # tell me if 64 is wrong
		do
			makedev ttyR$minor c $major1 $minor $dialout
			#makedev cur$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	ttyV)
		major1=`Major ttyV 105` || continue
		#major2=`Major cuv 106` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyV$minor c $major1 $minor $dialout
			#makedev cuv$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	digi|ttyD)
		major1=`Major ttyD 22` || continue
		#major2=`Major cud 23` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyD$minor c $major1 $minor $dialout
			#makedev cud$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	specialix|ttyX)
		major1=`Major ttyX 32` || continue
		#major2=`Major cux 33` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyX$minor c $major1 $minor $dialout
			#makedev cux$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	specialixIO8|ttyW)
		major1=`Major ttyW 75` || continue
		#major2=`Major cuw 76` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyW$minor c $major1 $minor $dialout
			#makedev cuw$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	PAM|ttyM)
		major1=`Major ttyM 79` || continue
		#major2=`Major cum 80` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyM$minor c $major1 $minor $dialout
			#makedev cum$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	riscom|ttyL)
		major=`Major ttyL 48` || continue
		minor=0
		until [ $minor -gt 16 ] # tell me if 16 is wrong
		do
			makedev ttyL$minor c $major $minor $dialout
			minor=`math minor + 1`
		done
		;;
	computone|ttyF)
		major=`Major ttyF 71` || continue
		#major2=`Major cuf 72` || continue
		minor=0
		until [ $minor -gt 255 ]
		do
			makedev ttyF$minor c $major $minor $dialout
			#makedev cuf$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		major=73
		for i in 0 4 8 12
		do
			makedev ip2ipl$i  c $major $i $private
			makedev ip2stat$i c $major `math $i + 1` $private
		done
		;;
	ESP|ttyP)
		major=`Major ttyP 57` || continue
		#major2=`Major cup 58` || continue
		minor=0
		until [ $minor -gt 4 ] # tell me if 4 is wrong
		do
			makedev ttyP$minor c $major $minor $dialout
			#makedev cup$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	COMX|comx)
		major=`Major comx 88` || continue
		minor=0
		until [ $minor -gt 4 ] # tell me if 4 is wrong
		do
			makedev comx$minor c $major $minor $private
			minor=`math minor + 1`
		done
		;;
	isdnmodem|ttyI)
		major1=`Major ttyI 43` || continue
		#major2=`Major cui 44` || continue
		minor=0
		until [ $minor -gt 63 ]
		do
			makedev ttyI$minor c $major1 $minor $dialout
			#makedev cui$minor c $major2 $minor $dialout
			minor=`math minor + 1`
		done
		;;
	isdnbri)
		major=45
		minor=0
		until [ $minor -gt 63 ]
		do
			makedev isdn$minor c $major $minor $private
			makedev isdnctrl$minor c $major `math $minor + 64` $private
			makedev ippp$minor c $major `math $minor + 128` $private
			minor=`math minor + 1`
		done
		makedev isdninfo c $major 255 $private
		;;
	dcbri)
		major=52
		for i in 0 1 2 3
		do
			makedev dcbri$i c $major $i $private
		done
		;;
	capi)
		major=68
		makedev capi20 c $major 0 $private
		for i in 0 1 2 3 4 5 6 7 8 9
		do
			makedev capi20.0$i c $major `math $i + 1` $private
		done
		for i in 10 11 12 13 14 15 16 17 18 19
		do
			makedev capi20.$i c $major `math $i + 1` $private
		done
		;;
	fb)
		for i in 0 1 2 3 4 5 6 7
		do
			makedev fb$i c 29 $i $cons
		done
		;;
	netlink)
		makedev route c 36 0 $coda
		makedev skip  c 36 1 $coda
		makedev fwmonitor c 36 3 $coda
		;;
	lp|par)
		major=`Major lp 6` || continue
		makedev lp0 c $major 0 $printer
		makedev lp1 c $major 1 $printer
		makedev lp2 c $major 2 $printer
		makedev lp3 c $major 3 $printer
		;;
	parport)
		major=`Major parport 99` || continue
		makedev ${arg}0 c $major 0 $printer
		makedev ${arg}1 c $major 1 $printer
		makedev ${arg}2 c $major 2 $printer
		makedev ${arg}3 c $major 3 $printer
		;;
	slm)
		major=`Major slm 28` || continue
		for i in 0 1 2 3
		do
			makedev slm c $major $i $printer
		done
		;;
	busmice)
		major=`Major mouse 10` || continue
		makedev logibm	  c $major 0 $mouse
		makedev psaux     c $major 1 $mouse
		makedev inportbm  c $major 2 $mouse
		makedev atibm     c $major 3 $mouse
		makedev jbm       c $major 4 $mouse
		;;
	misc)
		major=`Major mouse 10` || continue
		makedev logibm	  c $major 0 $mouse
		makedev psaux     c $major 1 $mouse
		makedev inportbm  c $major 2 $mouse
		makedev atibm     c $major 3 $mouse
		makedev jbm       c $major 4 $mouse
		makedev amigamouse c $major 4 $mouse
		makedev atarimouse c $major 5 $mouse
		makedev sunmouse  c $major 6 $mouse
		makedev amigamouse1 c $major 7 $mouse
		makedev smouse    c $major 8 $mouse
		makedev pc110pad  c $major 9 $mouse
		makedev adbmouse  c $major 10 $mouse
		makedev beep      c $major 128 $mouse
		makedev modreq    c $major 129 $mouse
		makedev watchdog  c $major 130 $mouse
		makedev temperature c $major 131 $mouse
		makedev hwtrap    c $major 132 $mouse
		makedev exttrp    c $major 133 $mouse
		makedev apm_bios  c $major 134 $mouse
		makedev rtc       c $major 135 $mouse
		makedev openprom  c $major 139 $mouse
		makedev relay8    c $major 140 $mouse
		makedev relay16   c $major 141 $mouse
		makedev msr       c $major 142 $mouse
		makedev pciconf   c $major 143 $mouse
		makedev nvram     c $major 144 $mouse
		makedev hfmodem   c $major 145 $mouse
		makedev led       c $major 151 $mouse
		makedev mergemem  c $major 153 $mouse
		makedev pmu       c $major 154 $mouse
		;;
        rtc)
		major=`Major mouse 10` || continue
		makedev rtc       c $major 135 $mouse
		;;
	joystick)
		major=`Major Joystick` || continue
		makedev js0 c 15 0 $mouse
		makedev js1 c 15 1 $mouse
		makedev djs0 c 15 128 $mouse
		makedev djs1 c 15 129 $mouse
		;;
	ed[a-b])
		major=`Major ed 36` || continue
		unit=`suffix $arg ed`
		base=`index ab $unit`
		base=`math $base \* 64`
		makedev ed$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 # 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev ed$unit$part b $major `math $base + $part` $disk
		done
		;;
	hd[a-b])
		major=`Major ide0 3`
		unit=`suffix $arg hd`
		base=`index ab $unit`
		base=`math $base \* 64`
		makedev hd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev hd$unit$part b $major `math $base + $part` $disk
		done
		;;
	hd[c-d])
		major=`Major ide1 22` || continue
		unit=`suffix $arg hd`
		base=`index cd $unit`
		base=`math $base \* 64`
		makedev hd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev hd$unit$part b $major `expr $base + $part` $disk
		done
		;;
	hd[e-f])
		major=`Major ide2 33` || continue
		unit=`suffix $arg hd`
		base=`index ef $unit`
		base=`math $base \* 64`
		makedev hd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev hd$unit$part b $major `expr $base + $part` $disk
		done
		;;
	hd[g-h])
		major=`Major ide3 34` || continue
		unit=`suffix $arg hd`
		base=`index gh $unit`
		base=`math $base \* 64`
		makedev hd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev hd$unit$part b $major `expr $base + $part` $disk
		done
		;;
	hd[i-j])
		major=`Major ide4 56` || continue
		unit=`suffix $arg hd`
		base=`index gh $unit`
		base=`math $base \* 64`
		makedev hd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev hd$unit$part b $major `expr $base + $part` $disk
		done
		;;
	hd[k-l])
		major=`Major ide4 57` || continue
		unit=`suffix $arg hd`
		base=`index gh $unit`
		base=`math $base \* 64`
		makedev hd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev hd$unit$part b $major `expr $base + $part` $disk
		done
		;;
	ht)
		major=`Major ht0 37` || continue
		makedev ht0 c $major 0 $tape
		makedev ht1 c $major 1 $tape
		makedev nht0 c $major 128 $tape
		makedev nht1 c $major 129 $tape
		;;
	pt)
		major=`Major pt 96` || continue
		for i in 0 1 2 3
		do
			makedev pt$i c $major $i $tape
			makedev npt$i c $major `math $i + 128` $tape
		done
		;;
	xd[a-d])
		major=`Major xd 13` || continue
		unit=`suffix $arg xd`
		base=`index abcd $unit`
		base=`math $base \* 64`
		makedev xd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 # 9 10 11 12 13 14 15 16 17 18 19 20
		do
			makedev xd$unit$part b $major `expr $base + $part` $disk
		done
		;;
	sd[a-z])
		major=`Major sd 8` || continue
		unit=`suffix $arg sd`
		base=`index abcdefghijklmnopqrstuvwxyz $unit`
		base=`math $base \* 16`
		if [ $base -lt 256 ]; then
			major=8
		else
			major=65
			base=`math $base \- 256`
		fi
		makedev sd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		do
			minor=`expr $base + $part`
			makedev sd$unit$part b $major $minor $disk
		done
		;;
	sd[a-d][a-z])
		unit=`suffix $arg sd`
		unitmaj=`first $unit`
		unitmin=`second $unit`
		basemaj=`index Xabcd $unitmaj`
		basemin=`index abcdefghijklmnopqrstuvwxyz $unitmin`
		basemaj=`math $basemaj \* 416`
		basemin=`math $basemin \* 16`
		base=`math $basemaj + $basemin`
		basemaj=`math $base / 256`
		base=`math $base % 256`
		major=`math basemaj \+ 64`
		if [ $major -gt 71 ]; then
			echo "$0: don't know how to make device \"$arg\"" >&2
			exit 0
		fi
		makedev sd$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		do
			minor=`expr $base + $part`
			makedev sd$unit$part b $major $minor $disk
		done
                ;;
	ad[a-p])
		major=`Major ad 28` || continue
		unit=`suffix $arg ad`
		base=`index abcdefghijklmnop $unit`
		base=`math $base \* 16`
		makedev ad$unit b $major $base $disk
		for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		do
			minor=`expr $base + $part`
			makedev ad$unit$part b $major $minor $disk
		done
		;;
	dac960)
		[ -d rd ] || {
			mkdir rd
			chown root.root rd
			chmod 755 rd
		}
		for ctr in 0 1 2 3 4 5 6 7
		do
		    major=`math 48 + $ctr`
		    minor=0
		    for ld in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 \
			    17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
		    do
			makedev rd/c${ctr}d${ld} b $major $minor $disk
			minor=`math minor + 1`
			for part in 1 2 3 4 5 6 7
			do
			    makedev rd/c${ctr}d${ld}p$part b $major $minor $disk
			    minor=`math minor + 1`
			done
		    done
		done
		;;
	ida)
		[ -d ida ] || {
			mkdir ida
			chown root.root ida
			chmod 755 ida
		}
		for ctr in 0 1 2 # 3 4 5 6 7
		do
		    major=`math 72 + $ctr`
		    minor=0
		    for ld in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		    do
			makedev ida/c${ctr}d${ld} b $major $minor $disk
			minor=`math minor + 1`
			for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
			do
			    makedev ida/c${ctr}d${ld}p$part b $major $minor $disk
			    minor=`math minor + 1`
			done
		    done
		done
		;;
	rom)
		major=`Major rom 31`
		for i in 0 1 2 3 4 5 6 7
		do
			makedev rom$i    b $major $i $disk
			makedev rrom$i   b $major `math $i +8` $disk
			makedev flash$i  b $major `math $i +16` $disk
			makedev rflash$i b $major `math $i +24` $disk
		done
		;;
	nb)
		major=`Major nbd 43` || continue
		minor=0
		while [ $minor -lt 128 ] ; do
			makedev nb$minor b $major $minor $disk
			minor=`math $minor + 1`
		done
		;;
	loop)
		major=`Major loop` || continue
		for part in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		do
			makedev loop$part b $major $part $disk
		done
		;;
	md)
		major=`Major md` || continue
		for part in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		do
			makedev md$part b $major $part $disk
		done
		;;
	st[0-7])
		major=`Major st 9`
		unit=`suffix $arg st`
		makedev st${unit}   c $major $unit $tape
		makedev nst${unit}  c $major `math 128 + $unit` $tape

		makedev st${unit}l  c $major `math 32 + $unit` $tape
		makedev nst${unit}l c $major `math 160 + $unit` $tape

		makedev st${unit}m  c $major `math 64 + $unit` $tape
		makedev nst${unit}m c $major `math 192 + $unit` $tape

		makedev st${unit}a  c $major `math 96 + $unit` $tape
		makedev nst${unit}a c $major `math 224 + $unit` $tape
		;;
	qic)
		major=`Major tpqic02 12`
		makedev ntpqic11   c $major   2 $tape
		makedev tpqic11    c $major   3 $tape
		makedev ntpqic24   c $major   4 $tape
		makedev tpqic24    c $major   5 $tape
		makedev ntpqic120  c $major   6 $tape
		makedev tpqic120   c $major   7 $tape
		makedev ntpqic150  c $major   8 $tape
		makedev tpqic150   c $major   9 $tape
		makedev rmt8       c $major   6 $tape
		makedev rmt16      c $major   8 $tape
		makedev tape-d     c $major 136 $tape
		makedev tape-reset c $major 255 $tape
		major=`Major qft 27`
		for i in 0 1 2 3
		do
			makedev qft$i     c $major $i $tape
			makedev nqft$i    c $major `math $i + 4` $tape
			makedev zqft$i    c $major `math $i + 16` $tape
			makedev nzqft$i   c $major `math $i + 20` $tape
			makedev rawqft$i  c $major `math $i + 32` $tape
			makedev nrawqft$i c $major `math $i + 36` $tape
		done
		;;
	ftape)
		major=`Major mt 27` || continue
		for unit in 0 1 2 3
		do
			makedev rft$unit c $major $unit $tape
			makedev nrft$unit c $major `math $unit + 4` $tape
		done
		symlink ftape rft0
		symlink nftape nrft0
		;;
	scd|scd-all)
		major=`Major sr 11` || continue
		for unit in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
		do
			makedev scd$unit b $major $unit $cdrom
		done
		;;
	cfs0)
		makedev cfs0 c 67 0 $coda
		;;
	scd[0-9]|scd[0-1][0-9])
		major=`Major sr 11` || continue
		unit=`suffix $arg scd`
		makedev scd$unit b $major $unit $cdrom
		;;
	ttyI[0-9]|ttyI[1-5][0-9]|ttyI[6][0-3])
		major=43
		unit=`suffix $arg ttyI`
		makedev ttyI$unit c $major $unit $dialout
		;;
	ippp[0-9]|ippp[1-5][0-9]|ippp[6][0-3])
		major=45
		unit=`suffix $arg ippp`
		minor=`math $unit + 128`
		makedev ippp$unit c $major $minor $dialout
		;;
	isdn[0-9]|isdn[1-5][0-9]|isdn[6][0-3])
		major=45
		unit=`suffix $arg isdn`
		minor=`math $unit + 0`
		makedev isdn$unit c $major $minor $dialout
		;;
	isdnctrl[0-9]|isdnctrl[1-5][0-9]|isdnctrl[6][0-3])
		major=45
		unit=`suffix $arg isdnctrl`
		minor=`math $unit + 64`
		makedev isdnctrl$unit c $major $minor $dialout
		;;
	isdninfo)
		makedev isdninfo c 45 255 $dialout
		;;
	isdn-tty)
		major=43
		for unit in 0 1 2 3 4 5 6 7
		do
			makedev ttyI$unit c $major $unit $dialout
		done
		;;
	isdn-ippp)
		major=45
		for unit in 0 1 2 3 4 5 6 7
		do
			makedev ippp$unit c $major `math $unit + 128` $dialout
		done
		;;
	isdn-io)
		for unit in 0 1 2 3 4 5 6 7
		do
			makedev isdn$unit c 45 $unit $dialout
			makedev isdnctrl$unit c 45 `math $unit + 64` $dialout
			makedev ippp$unit c 45 `math $unit + 128` $dialout
		done
		makedev isdninfo c 45 255 $dialout
		;;
	sonycd)
		major=`Major cdu31a` || continue
		makedev $arg b $major 0 $cdrom
		;;
	mcd)
		major=`Major mcd 23` || continue
		makedev $arg b $major 0 $cdrom
		;;
	mcdx)
		major=`Major mcdx 20` || continue
		makedev $arg b $major 0 $cdrom
		;;
	cdu535)
		makedev $arg b 24 0 $cdrom
		;;
	lmscd)
		makedev $arg b 24 0 $cdrom
		;;
	sbpcd|sbpcd[123])
		major=`Major $arg` || continue
		base=`suffix ${arg}0 sbpcd`
		# base=`expr ${arg}0 : "sbpcd\(.\)"`
		for minor in 0 1 2 3
		do
			# XXX
			unit=`expr substr 0123456789abcdef \( $base \* 4 + $minor + 1 \) 1`
			makedev sbpcd$unit b $major $minor $cdrom
		done
		[ $arg = sbpcd ] && symlink $arg ${arg}0
		;;
	aztcd)
		major=`Major $arg` || continue
		makedev ${arg}0 b $major 0 $cdrom
		;;
	bpcd)
		makedev $arg b 41 0 $cdrom
		;;
	optcd)
		makedev $arg b 17 0 $cdrom
		;;
	sjcd)
		makedev $arg b 18 0 $cdrom
		;;
	cfs|coda)
		makedev cfs0 c 67 0 $private
		;;
	xfs|arla)
		makedev xfs0 c 103 0 $private
		;;
	logiscan)
		major=`Major logiscan` || continue
		makedev $arg c $major 0 $scanner
		;;
	m105scan)
		major=`Major m105` || continue
		makedev $arg c $major 0 $scanner
		;;
	ac4096)
		major=`Major ac4096` || continue
		makedev $arg c $major 0 $scanner
		;;
	audio)
		major=`Major sound 14`
		makedev mixer      c $major  0 $audio
		makedev sequencer  c $major  1 $audio
		makedev midi00     c $major  2 $audio
		makedev dsp        c $major  3 $audio
		makedev audio      c $major  4 $audio
		makedev sndstat    c $major  6 $audio
		makedev sequencer2 c $major  8 $audio
		makedev mixer1     c $major 16 $audio
		makedev patmgr0    c $major 17 $audio
		makedev midi01     c $major 18 $audio
		makedev dsp1       c $major 19 $audio
		makedev audio1     c $major 20 $audio
		makedev patmgr1    c $major 33 $audio
		makedev midi02     c $major 34 $audio
		makedev midi03     c $major 50 $audio
		major=31
		makedev mpu401data c $major 0  $audio
		makedev mpu401stat c $major 1  $audio
		major=35
		for i in 0 1 2 3
		do
			makedev midi$i  c $major $i $audio
			makedev rmidi$i c $major `math $i + 64` $audio
			makedev smpte$i c $major `math $i + 128` $audio
		done
		;;
	pcaudio)
		major=`Major pcsp` || continue
		makedev pcmixer c $major 0 $audio
		makedev pcsp    c $major 3 $audio
		makedev pcaudio c $major 4 $audio
		;;
	video|video4linux|v4l|radio)
		# video4linux api includes radio, teletext, etc.
		major=`Major video 81` || continue
		minor=0
		until [ $minor -gt 63 ]
		do
			makedev video$minor c $major $minor $video
			makedev radio$minor c $major `math $minor + 64` $video
			minor=`math $minor + 1`
		done
		minor=0
		until [ $minor -gt 31 ]
		do
			makedev vtx$minor c $major `math $minor + 192` $video
			makedev vbi$minor c $major `math $minor + 224` $video
			minor=`math $minor + 1`
		done
		symlink video video0
		major=82
		minor=0
		until [ $minor -gt 1 ]
		do
			makedev winradio$minor c $major $minor $video
			minor=`math $minor + 1`
		done
		major=83
		makedev vtx     c $major 0 $video
		makedev vttuner c $major 16 $video
		;;
	i2c)
		major=`Major i2c 89` || continue
		minor=0
		until [ $minor -gt 1 ]; do
			makedev i2c-$minor c $major $minor $private
			minor=`math $minor + 1`
		done
		;;
	tlk)
		major=102
		minor=0
		until [ $minor -gt 3 ] # tell me if 3 is wrong...
		do
			makedev tlk$minor c $major $minor $video
			minor=`math $minor + 1`
		done
		;;
	srnd)
		makedev srnd0 c 110 0 $video
		makedev srnd1 c 110 1 $video
		;;
	fgrab)
		makedev mmetfgrab c 40 0 $video
		makedev wvisfgrab c 26 0 $video
		for i in 0 1 # more?
		do
			makedev iscc$i    c 93 $i $video
			makedev isccctl$i c 93 `math $i + 128` $video
		done
		for i in 0 1 # more?
		do
			makedev dcxx$i c 94 $i $video
		done
		;;
	sg|sg-all)
		major=`Major sg 21`
		for unit in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
		do
			makedev sg$unit c $major $unit $scsi
		done
		;;
	sg[0-9]|sg[0-1][0-9])
		major=`Major sg 11` || continue
		unit=`suffix $arg sg`
		makedev sg$unit c $major $unit $cdrom
		;;
	pg)
		major=`Major pg 97`
		for unit in 0 1 2 3
		do
			makedev pg$unit c $major $unit $scsi
		done
		;;
	ibcs2)
		major=`Major ibcs2` || continue
		makedev socksys c $major 0 $ibcs2
		symlink nfsd socksys
		makedev spx     c $major 1 $ibcs2
		symlink X0R null
		;;
	enskip)
		major=64
		makedev enskip c $major 0 $private
		;;
	ipfilt*)
		major=95
		makedev ipl     c $major 0 $private
		makedev ipnat   c $major 1 $private
		makedev ipstate c $major 2 $private
		makedev ipauth  c $major 3 $private
		;;
	qng)
		makedev qng c 77 0 $private
		;;
	apm)
		makedev apm_bios c 10 134 $system
		;;
	dcf)
		major=`Major dcf` || continue
		makedev $arg c $major 0 $system
		;;
	helloworld)
		major=`Major hw` || continue
		makedev helloworld c $major 0 $public
		;;
	ipsec)
		# For the Free S/WAN (http://www.xs4all.nl/~freeswan/)
		# implementation of IPSEC
		makedev ipsec c 36 10 $ipsec
		;;
	ppp)
		makedev ppp c 108 0 $dialout
		;;
	*)
		echo "$0: don't know how to make device \"$arg\"" >&2
		exit 1
		;;
	esac
done

exit 0