219 lines
4.7 KiB
Bash
219 lines
4.7 KiB
Bash
#!/bin/sh
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#
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# DESCRIBE 2.2 - Describe the given devices. Author: Kees J. Bot
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#
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# BUGS
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# - Arguments may not contain shell metacharacters.
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case $# in
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0) flag=; set -$- /dev ;;
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*) flag=d ;;
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esac
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ls -l$flag $* | \
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sed -e '/^total/d' \
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-e '/^l/d' \
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-e '/^[^bc]/s/.* /BAD BAD /' \
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-e '/^[bc]/s/.* \([0-9][0-9]*\), *\([0-9][0-9]*\).* /\1 \2 /' \
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| {
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ex=0 # exit code
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while read major minor path
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do
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case $path in
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/*) name=`expr $path : '.*/\\(.*\\)$'`
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;;
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*) name=$path
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esac
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dev= des=
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case $major in # One of the controllers? What is its controller nr?
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3) ctrlr=0 ;;
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8) ctrlr=1 ;;
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10) ctrlr=2 ;;
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12) ctrlr=3 ;;
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esac
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case $major,$minor in
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1,0) des="RAM disk" dev=ram
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;;
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1,1) des="memory" dev=mem
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;;
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1,2) des="kernel memory" dev=kmem
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;;
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1,3) des="null device, data sink" dev=null
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;;
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1,4) des="boot device loaded from boot image" dev=boot
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;;
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1,5) des="null byte stream generator" dev=zero
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;;
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1,6) des="boot image RAM disk" dev=imgrd
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;;
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1,[789]|1,1[012])
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ramdisk=`expr $minor - 7`
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des="RAM disk $ramdisk" dev=ram$ramdisk
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;;
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2,*) drive=`expr $minor % 4`
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case `expr $minor - $drive` in
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0) des='auto density' dev="fd$drive"
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;;
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4) des='360k, 5.25"' dev="pc$drive"
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;;
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8) des='1.2M, 5.25"' dev="at$drive"
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;;
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12) des='360k in 720k, 5.25"' dev="qd$drive"
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;;
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16) des='720k, 3.5"' dev="ps$drive"
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;;
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20) des='360k in 1.2M, 5.25"' dev="pat$drive"
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;;
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24) des='720k in 1.2M, 5.25"' dev="qh$drive"
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;;
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28) des='1.44M, 3.5"' dev="PS$drive"
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;;
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112) des='auto partition 0' dev="fd${drive}p0"
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;;
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116) des='auto partition 1' dev="fd${drive}p1"
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;;
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120) des='auto partition 2' dev="fd${drive}p2"
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;;
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124) des='auto partition 3' dev="fd${drive}p3"
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;;
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*) dev=BAD
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esac
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des="floppy drive $drive ($des)"
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;;
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[38],[05]|[38],[123][05]|1[02],[05]|1[02],[123][05])
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drive=`expr $minor / 5`
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des="controller $ctrlr disk $drive" dev=c${ctrlr}d${drive}
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;;
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[38],?|[38],[123]?|1[02],?|1[02],[123]?)
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drive=`expr $minor / 5`
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par=`expr $minor % 5 - 1`
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des="controller $ctrlr disk $drive partition $par"
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dev=c${ctrlr}d${drive}p${par}
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;;
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[38],12[89]|[38],1[3-9]?|[38],2??|1[02],12[89]|1[02],1[3-9]?|1[02],2??)
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drive=`expr \\( $minor - 128 \\) / 16`
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par=`expr \\( \\( $minor - 128 \\) / 4 \\) % 4`
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sub=`expr \\( $minor - 128 \\) % 4`
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des="hard disk $drive, partition $par, subpartition $sub"
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des="controller $ctrlr disk $drive partition $par slice $sub"
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#par=`expr $drive '*' 5 + $par`
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dev=c${ctrlr}d${drive}p${par}s${sub}
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;;
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[38],6[4-9]|[38],7?|1[02],6[4-9]|1[02],7?)
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tape=`expr \\( $minor - 64 \\) / 2`
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case $minor in
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*[02468])
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des="controller $ctrlr tape $tape (non-rewinding)"
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dev=c${ctrlr}t${tape}n
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;;
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*[13579])
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des="controller $ctrlr tape $tape (rewinding)"
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dev=c${ctrlr}t${tape}
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esac
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;;
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4,0) des="console device" dev=console
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;;
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4,[1-7])des="virtual console $minor" dev=ttyc$minor
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;;
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4,15) des="diagnostics device" dev=log
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;;
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4,1[6-9])
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line=`expr $minor - 16`
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des="serial line $line" dev=tty0$line
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;;
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4,125) des="video output" dev=video
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;;
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4,126) des="auxiliary input" dev=kbdaux
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;;
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4,127) des="keyboard input" dev=kbd
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;;
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4,12[89]|4,1[3-8]?|4,19[01])
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p=`expr \\( $minor - 128 \\) / 16 | tr '0123' 'pqrs'`
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n=`expr $minor % 16`
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test $n -ge 10 && n=`expr $n - 10 | tr '012345' 'abcdef'`
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des="pseudo tty `expr $minor - 128`" dev=tty$p$n
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;;
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4,???)
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p=`expr \\( $minor - 192 \\) / 16 | tr '0123' 'pqrs'`
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n=`expr $minor % 16`
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test $n -ge 10 && n=`expr $n - 10 | tr '012345' 'abcdef'`
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des="controller of tty$p$n" dev=pty$p$n
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;;
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5,0) des="anonymous tty" dev=tty
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;;
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6,0) des="line printer, parallel port" dev=lp
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;;
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7,*)
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d=`expr $minor % 8`
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n=`expr $minor / 8`
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case $d in
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0) des="IP stat" dev=ipstat
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;;
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1) case $name in
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psip*)
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des="Pseudo IP #$n" dev=psip
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;;
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*) des="raw ethernet #$n" dev=eth
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esac
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;;
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2) des="raw IP #$n" dev=ip
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;;
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3) des="TCP/IP #$n" dev=tcp
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;;
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4) des="UDP #$n" dev=udp
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esac
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case $d in
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[0123])
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if [ "$name" = "$dev" ]
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then
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des="$des (default)"
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else
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dev=$dev$n
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fi
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esac
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;;
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11,0)
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des="block filter" dev=filter
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;;
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13,0)
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des="audio" dev=audio
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;;
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14,0)
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des="audio mixer" dev=mixer
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;;
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15,0)
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des="kernel log" dev=klog
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;;
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16,0)
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des="pseudo random number generator" dev=urandom
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;;
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17,0)
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des="hello" dev=hello
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;;
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BAD,BAD)
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des= dev=
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;;
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*) dev=BAD
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esac
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case $name:$dev in
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*:)
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echo "$path: not a device" >&2
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ex=1
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;;
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*:*BAD*)
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echo "$path: cannot describe: major=$major, minor=$minor" >&2
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ex=1
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;;
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$dev:*)
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echo "$path: $des"
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;;
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*:*) echo "$path: nonstandard name for $dev: $des"
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esac
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done
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exit $ex
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}
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