#!/bin/sh # # DESCRIBE 1.17 - 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 '/^[^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 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 ;; 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}a" ;; 116) des='auto partition 1' dev="fd${drive}b" ;; 120) des='auto partition 2' dev="fd${drive}c" ;; 124) des='auto partition 3' dev="fd${drive}d" ;; *) dev=BAD esac des="floppy drive $drive ($des)" ;; 3,[05]|3,[123][05]) drive=`expr $minor / 5` des="hard disk drive $drive" dev=hd$minor ;; 3,?|3,[123]?) drive=`expr $minor / 5` par=`expr $minor % 5` des="hard disk $drive, partition $par" dev=hd$minor ;; 3,12[89]|3,1[3-9]?|3,2??) drive=`expr \\( $minor - 128 \\) / 16` par=`expr \\( \\( $minor - 128 \\) / 4 \\) % 4 + 1` sub=`expr \\( $minor - 128 \\) % 4 + 1` des="hard disk $drive, partition $par, subpartition $sub" par=`expr $drive '*' 5 + $par` case $sub in 1) dev=hd${par}a ;; 2) dev=hd${par}b ;; 3) dev=hd${par}c ;; 4) dev=hd${par}d ;; 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 ;; 4,12[89]|4,1[3-8]?|4,19[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 ;; 4,???) 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 ;; 5,0) des="anonymous tty" dev=tty ;; 6,0) des="line printer, parallel port" dev=lp ;; 7,1) des="raw ethernet" dev=eth ;; 7,2) des="raw IP" dev=ip ;; 7,3) des="TCP/IP" dev=tcp ;; 7,4) des="UDP" dev=udp ;; 8,0) des="CD-ROM" dev=cd0 ;; 8,[1-4]) des="CD-ROM, partition $minor" dev=cd$minor ;; 8,12[89]|8,13?|8,14[0-3]) par=`expr \\( $minor - 128 \\) / 4 + 1` sub=`expr \\( $minor - 128 \\) % 4 + 1` des="CD-ROM, partition $par, subpartition $sub" case $sub in 1) dev=cd${par}a ;; 2) dev=cd${par}b ;; 3) dev=cd${par}c ;; 4) dev=cd${par}d ;; esac ;; 10,[05]|10,[123][05]) drive=`expr $minor / 5` des="scsi disk drive $drive" dev=sd$minor ;; 10,?|10,[123]?) drive=`expr $minor / 5` par=`expr $minor % 5` des="scsi disk $drive, partition $par" dev=sd$minor ;; 10,12[89]|10,1[3-9]?|10,2??) drive=`expr \\( $minor - 128 \\) / 16` par=`expr \\( \\( $minor - 128 \\) / 4 \\) % 4 + 1` sub=`expr \\( $minor - 128 \\) % 4 + 1` des="scsi disk $drive, partition $par, subpartition $sub" par=`expr $drive '*' 5 + $par` case $sub in 1) dev=sd${par}a ;; 2) dev=sd${par}b ;; 3) dev=sd${par}c ;; 4) dev=sd${par}d ;; esac ;; 10,6[4-9]|10,7?) tape=`expr \\( $minor - 64 \\) / 2` case $minor in *[02468]) des="scsi tape $tape (non-rewinding)" dev=nrst$tape ;; *[13579]) des="scsi tape $tape (rewinding)" dev=rst$tape esac ;; 13,0) des="audio" dev=audio ;; 14,0) des="audio mixer" dev=mixer ;; 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 }