minix3/commands/DESCRIBE/DESCRIBE.sh

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#!/bin/sh
#
# DESCRIBE 2.2 - Describe the given devices. Author: Kees J. Bot
#
# BUGS
# - Arguments may not contain shell metacharacters.
case $# in
0) flag=; set -$- /dev ;;
*) flag=d ;;
esac
ls -l$flag $* | \
sed -e '/^total/d' \
-e '/^l/d' \
-e '/^[^bc]/s/.* /BAD BAD /' \
-e '/^[bc]/s/.* \([0-9][0-9]*\), *\([0-9][0-9]*\).* /\1 \2 /' \
| {
ex=0 # exit code
while read major minor path
do
case $path in
/*) name=`expr $path : '.*/\\(.*\\)$'`
;;
*) name=$path
esac
dev= des=
case $major in # One of the controllers? What is its controller nr?
3) ctrlr=0 ;;
8) ctrlr=1 ;;
10) ctrlr=2 ;;
12) ctrlr=3 ;;
esac
case $major,$minor in
1,0) des="RAM disk" dev=ram
;;
1,1) des="memory" dev=mem
;;
1,2) des="kernel memory" dev=kmem
;;
1,3) des="null device, data sink" dev=null
;;
1,4) des="boot device loaded from boot image" dev=boot
;;
1,5) des="null byte stream generator" dev=zero
;;
1,6) des="boot image RAM disk" dev=imgrd
;;
1,[789]|1,1[012])
ramdisk=`expr $minor - 7`
des="RAM disk $ramdisk" dev=ram$ramdisk
;;
2,*) drive=`expr $minor % 4`
case `expr $minor - $drive` in
0) des='auto density' dev="fd$drive"
;;
4) des='360k, 5.25"' dev="pc$drive"
;;
8) des='1.2M, 5.25"' dev="at$drive"
;;
12) des='360k in 720k, 5.25"' dev="qd$drive"
;;
16) des='720k, 3.5"' dev="ps$drive"
;;
20) des='360k in 1.2M, 5.25"' dev="pat$drive"
;;
24) des='720k in 1.2M, 5.25"' dev="qh$drive"
;;
28) des='1.44M, 3.5"' dev="PS$drive"
;;
112) des='auto partition 0' dev="fd${drive}p0"
;;
116) des='auto partition 1' dev="fd${drive}p1"
;;
120) des='auto partition 2' dev="fd${drive}p2"
;;
124) des='auto partition 3' dev="fd${drive}p3"
;;
*) dev=BAD
esac
des="floppy drive $drive ($des)"
;;
[38],[05]|[38],[123][05]|1[02],[05]|1[02],[123][05])
drive=`expr $minor / 5`
des="controller $ctrlr disk $drive" dev=c${ctrlr}d${drive}
;;
[38],?|[38],[123]?|1[02],?|1[02],[123]?)
drive=`expr $minor / 5`
par=`expr $minor % 5 - 1`
des="controller $ctrlr disk $drive partition $par"
dev=c${ctrlr}d${drive}p${par}
;;
[38],12[89]|[38],1[3-9]?|[38],2??|1[02],12[89]|1[02],1[3-9]?|1[02],2??)
drive=`expr \\( $minor - 128 \\) / 16`
par=`expr \\( \\( $minor - 128 \\) / 4 \\) % 4`
sub=`expr \\( $minor - 128 \\) % 4`
des="hard disk $drive, partition $par, subpartition $sub"
des="controller $ctrlr disk $drive partition $par slice $sub"
#par=`expr $drive '*' 5 + $par`
dev=c${ctrlr}d${drive}p${par}s${sub}
;;
[38],6[4-9]|[38],7?|1[02],6[4-9]|1[02],7?)
tape=`expr \\( $minor - 64 \\) / 2`
case $minor in
*[02468])
des="controller $ctrlr tape $tape (non-rewinding)"
dev=c${ctrlr}t${tape}n
;;
*[13579])
des="controller $ctrlr tape $tape (rewinding)"
dev=c${ctrlr}t${tape}
esac
;;
4,0) des="console device" dev=console
;;
4,[1-7])des="virtual console $minor" dev=ttyc$minor
;;
4,15) des="diagnostics device" dev=log
;;
4,1[6-9])
line=`expr $minor - 16`
des="serial line $line" dev=tty0$line
;;
4,125) des="video output" dev=video
;;
5,0) des="anonymous tty" dev=tty
;;
6,0) des="line printer, parallel port" dev=lp
;;
7,*)
d=`expr $minor % 8`
n=`expr $minor / 8`
case $d in
0) des="IP stat" dev=ipstat
;;
1) case $name in
psip*)
des="Pseudo IP #$n" dev=psip
;;
*) des="raw ethernet #$n" dev=eth
esac
;;
2) des="raw IP #$n" dev=ip
;;
3) des="TCP/IP #$n" dev=tcp
;;
4) des="UDP #$n" dev=udp
esac
case $d in
[0123])
if [ "$name" = "$dev" ]
then
des="$des (default)"
else
dev=$dev$n
fi
esac
;;
9,12[89]|9,1[3-8]?|9,19[01])
p=`expr \\( $minor - 128 \\) / 16 | tr '0123' 'pqrs'`
n=`expr $minor % 16`
test $n -ge 10 && n=`expr $n - 10 | tr '012345' 'abcdef'`
des="pseudo tty `expr $minor - 128`" dev=tty$p$n
;;
9,???)
p=`expr \\( $minor - 192 \\) / 16 | tr '0123' 'pqrs'`
n=`expr $minor % 16`
test $n -ge 10 && n=`expr $n - 10 | tr '012345' 'abcdef'`
des="controller of tty$p$n" dev=pty$p$n
;;
11,0)
des="block filter" dev=filter
;;
13,0)
des="audio" dev=audio
;;
14,0)
des="faulty block device driver" dev=fbd
;;
15,0)
des="kernel log" dev=klog
;;
16,0)
des="pseudo random number generator" dev=urandom
;;
17,0)
des="hello" dev=hello
;;
18,0)
des="UNIX domain socket" dev=uds
;;
5[6-9],0|6[0-3],0)
drive=`expr $major - 56`
des="vnode disk $drive" dev=vnd$drive
;;
5[6-9],[1-4]|6[0-3],[1-4])
drive=`expr $major - 56`
par=`expr $minor - 1`
des="vnode disk $drive partition $par" dev=vnd${drive}p${par}
;;
5[6-9],12[89]|5[6-9],13[0-9]|5[6-9],14[0-3]|6[0-3],12[89]|5[6-9],13[0-9]|5[6-9],14[0-3])
drive=`expr $major - 56`
par=`expr \\( \\( $minor - 128 \\) / 4 \\) % 4`
sub=`expr \\( $minor - 128 \\) % 4`
des="vnode disk $drive partition $par slice $sub"
dev=vnd${drive}p${par}s${sub}
;;
64,0)
des="keyboard input multiplexer"
dev=kbdmux
;;
64,[1-4])
n=`expr $minor - 1`
des="keyboard input $n"
dev=kbd$n
;;
64,64)
des="mouse input multiplexer"
dev=mousemux
;;
64,6[5-8])
n=`expr $minor - 65`
des="mouse input $n"
dev=mouse$n
;;
BAD,BAD)
des= dev=
;;
*) dev=BAD
esac
case $name:$dev in
*:)
echo "$path: not a device" >&2
ex=1
;;
*:*BAD*)
echo "$path: cannot describe: major=$major, minor=$minor" >&2
ex=1
;;
$dev:*)
echo "$path: $des"
;;
*:*) echo "$path: nonstandard name for $dev: $des"
esac
done
exit $ex
}