makedev

早期freebsd实现

#!/bin/sh -
#
#	@(#)MAKEDEV	8.1 (Berkeley) 6/9/93
#

# Device "make" file.  Valid arguments:
#	std	standard devices
#	local	configuration specific devices
#
# Tapes:
#	wt*	QIC-interfaced (e.g. not SCSI) 3M cartridge tape
#
# Disks:
#	wd*	"winchester" disk drives (ST506,IDE,ESDI,RLL,...)
#	fd*	"floppy" disk drives (3 1/2", 5 1/4")
#
# Terminal ports:
#	com*	standard PC COM ports
#
# Pseudo terminals:
#	pty*	set of 16 master and slave pseudo terminals
#
# Printers:
#
# Call units:
#
# Special purpose devices:
#	flog*	kernel logging device
#

PATH=/sbin:/bin/:/usr/bin
umask 77
for i
do
case $i in

std)
	mknod console		c 0 0
	mknod drum		c 4 0	; chmod 640 drum ; chgrp kmem drum
	mknod kmem		c 2 1	; chmod 640 kmem ; chgrp kmem kmem
	mknod mem		c 2 0	; chmod 640 mem ; chgrp kmem mem
	mknod null		c 2 2	; chmod 666 null
	mknod zero      	c 2 12  ; chmod 666 zero
	mknod tty		c 1 0	; chmod 666 tty
	mknod klog		c 7 0	; chmod 600 klog
	mknod stdin		c 53 0	; chmod 666 stdin
	mknod stdout		c 53 1	; chmod 666 stdout
	mknod stderr		c 53 2	; chmod 666 stderr
	mkdir fd > /dev/null 2>&1
	(cd fd && eval `echo "" | awk ' BEGIN { \
		for (i = 0; i < 64; i++) \
			printf("mknod %d c 53 %d;", i, i)}'`)
	chown -R bin.bin fd
	chmod 555 fd
	chmod 666 fd/*
	;;

wt*)
	umask 0 ; unit=`expr $i : '..\(.*\)'`
	case $i in
	wt*) blk=3; chr=10;;
	esac
	case $unit in
	0)
		four=`expr $unit + 4` ; eight=`expr $unit + 8`
		twelve=`expr $unit + 12`; twenty=`expr $unit + 20`
		#
		# block devices don't work so don't make them
		#mknod wt$unit	b $blk $unit
		#mknod wt$four	b $blk $four
		#mknod wt$eight	b $blk $eight
		#mknod wt$twelve	b $blk $twelve
		#mknod nwt$unit	b $blk $four ;: sanity w/pdp11 v7
		#mknod nwt$eight	b $blk $twelve ;: ditto
		#
		mknod rwt$unit	c $chr $unit
		mknod rwt$four	c $chr $four
		mknod rwt$eight	c $chr $eight
		mknod rwt$twelve	c $chr $twelve
		ln rwt$four nrwt$unit ;: sanity w/pdp11 v7
		ln rwt$twelve nrwt$eight ;: ditto
		;;
	*)
		echo bad unit for tape in: $1
		;;
	esac
	umask 77
	;;

fd*|wd*)
	umask 2 ; unit=`expr $i : '..\(.*\)'`
	case $i in
	fd*) name=fd; blk=2; chr=9;;
	wd*) name=wd; blk=0; chr=3;;
	esac
	case $unit in
	0|1)
		mknod ${name}${unit}a	b $blk `expr $unit '*' 8 + 0`
		mknod ${name}${unit}b	b $blk `expr $unit '*' 8 + 1`
		mknod ${name}${unit}c	b $blk `expr $unit '*' 8 + 2`
		mknod ${name}${unit}d	b $blk `expr $unit '*' 8 + 3`
		mknod ${name}${unit}e	b $blk `expr $unit '*' 8 + 4`
		mknod ${name}${unit}f	b $blk `expr $unit '*' 8 + 5`
		mknod ${name}${unit}g	b $blk `expr $unit '*' 8 + 6`
		mknod ${name}${unit}h	b $blk `expr $unit '*' 8 + 7`
		mknod r${name}${unit}a	c $chr `expr $unit '*' 8 + 0`
		mknod r${name}${unit}b	c $chr `expr $unit '*' 8 + 1`
		mknod r${name}${unit}c	c $chr `expr $unit '*' 8 + 2`
		mknod r${name}${unit}d	c $chr `expr $unit '*' 8 + 3`
		mknod r${name}${unit}e	c $chr `expr $unit '*' 8 + 4`
		mknod r${name}${unit}f	c $chr `expr $unit '*' 8 + 5`
		mknod r${name}${unit}g	c $chr `expr $unit '*' 8 + 6`
		mknod r${name}${unit}h	c $chr `expr $unit '*' 8 + 7`
		chgrp operator ${name}${unit}[a-h] r${name}${unit}[a-h]
		chmod 640 ${name}${unit}[a-h] r${name}${unit}[a-h]
		;;
	*)
		echo bad unit for disk in: $i
		;;
	esac
	umask 77
	;;

com*)
	unit=`expr $i : 'dca\(.*\)'`
	case $unit in
	1)
		mknod com1 c 8 0
		;;
	2)
		mknod com1 c 8 1
		;;
	*)
		echo bad unit for com in: $i
		;;
	esac
	;;

pty*)
	class=`expr $i : 'pty\(.*\)'`
	case $class in
	0) offset=0 name=p;;
	1) offset=16 name=q;;
	2) offset=32 name=r;;
	3) offset=48 name=s;;
# Note that telnetd, rlogind, and xterm (at least) only look at p-s.
	4) offset=64 name=t;;
	*) echo bad unit for pty in: $i;;
	esac
	case $class in
	0|1|2|3|4)
		umask 0
		eval `echo $offset $name | awk ' { b=$1; n=$2 } END {
			for (i = 0; i < 16; i++)
				printf("mknod tty%s%x c 4 %d; \
					mknod pty%s%x c 5 %d; ", \
					n, i, b+i, n, i, b+i); }'`
		umask 77
		if [ $class = 1 ]; then
			mv ttyqf ttyv0; mv ptyqf ptyv0
		fi
		;;
	esac
	;;

local)
	umask 0
	sh MAKEDEV.local
	;;

esac
done