[src/trunk]: src/etc MAKEDEV dk<n> should create only the dk<n> device, but i...

[apb <apb%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/225c2f21a2f3
branches:  trunk
changeset: 769311:225c2f21a2f3
user:      apb <apb%NetBSD.org@localhost>
date:      Tue Sep 06 13:34:44 2011 +0000

description:
MAKEDEV dk<n> should create only the dk<n> device, but it previously
looped creating everything from dk0 to dk<n>.
Reported by M. Levinson.

Also add comments to cases where MAKEDEV loops creating multiple
devices.

diffstat:

 etc/MAKEDEV.tmpl |  28 ++++++++++++++++++++--------
 1 files changed, 20 insertions(+), 8 deletions(-)

diffs (85 lines):

diff -r 86c000e33786 -r 225c2f21a2f3 etc/MAKEDEV.tmpl
--- a/etc/MAKEDEV.tmpl  Tue Sep 06 11:31:47 2011 +0000
+++ b/etc/MAKEDEV.tmpl  Tue Sep 06 13:34:44 2011 +0000
@@ -1,5 +1,5 @@
 #!/bin/sh -
-#      $NetBSD: MAKEDEV.tmpl,v 1.141 2011/09/06 10:54:03 apb Exp $
+#      $NetBSD: MAKEDEV.tmpl,v 1.142 2011/09/06 13:34:44 apb Exp $
 #
 # Copyright (c) 2003,2007,2008 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -984,6 +984,7 @@
 
 fd)
        if ! $fdesc_mounted; then
+               # Create the "fd" subdirectory, and devices "fd/0" to "fd/63"
                makedir fd 755
                n=0
                while [ $n -lt 64 ]
@@ -1095,16 +1096,14 @@
 
 dk[0-9]*)
        name=dk; unit=${i#dk}; blk=%dk_blk%; chr=%dk_chr%
-       minor=0
-       while [ $minor -le ${i#dk} ]
-       do
-               mkdev r$name$minor c $chr $minor 0640 $g_operator
-               mkdev $name$minor b $blk  $minor 0640 $g_operator
-               minor=$(($minor + 1))
-       done
+       mkdev r$name$unit c $chr $unit 0640 $g_operator
+       mkdev $name$unit b $blk  $unit 0640 $g_operator
        ;;
 
 ttyCY[0-9]*)
+       # Each unit number creates 32 pairs of {tty,dty} device nodes:
+       # ttyCY0 => device nodes [td]tyCY000 to [td]tyCY031;
+       # ttyCY1 => device nodes [td]tyCY032 to [td]tyCY063;
        name=tyCY; chr=%cy_chr%; off=32
        unit=${i#t${name}}
        minor=$(($unit * $off))
@@ -1120,6 +1119,9 @@
        ;;
 
 ttyCZ[0-9]*)
+       # Each unit number creates 64 pairs of {tty,dty} device nodes:
+       # ttyCZ0 => device nodes [td]tyCZ0000 to [td]tyCZ0063;
+       # ttyCZ1 => device nodes [td]tyCZ0064 to [td]tyCZ0127;
        name=tyCZ; chr=%cz_chr%; off=64
        unit=${i#t${name}}
        minor=$(($unit * $off))
@@ -1180,6 +1182,8 @@
        ;;
 
 opty)
+       # Create 16 device nodes, [pt]typ0 to [pt]typf,
+       # same as "MAKEDEV pty0".
        for j in 0 1 2 3 4 5 6 7 8 9 a b c d e f
        do
                case $j in
@@ -1197,6 +1201,12 @@
        ;;
 
 pty[0-9]*)
+       # Each unit number creates up to 16 pairs of {tty,pty} device nodes:
+       # pty0 => 16 pairs, [tp]typ0 to [tp]typf
+       # pty1 => 16 pairs, [tp]tyq0 to [tp]tyqf
+       # pty16 => 16 pairs, [tp]typg to [tp]typv
+       # pty17 => 16 pairs, [tp]typw to [tp]typL
+       # pty18 => 14 pairs, [tp]typM to [tp]typZ
        class=${i#pty}
        d1="p q r s t u v w x y z P Q R S T"
        if [ "$class" -ge 64 ]
@@ -1205,10 +1215,12 @@
                continue
        elif [ "$class" -lt 16 ]
        then
+               # pty[p-zP-T][0-9a-f]
                offset=0
                mult=0
                d2="0 1 2 3 4 5 6 7 8 9 a b c d e f"
        else
+               # pty[p-zP-T][g-zA-Z]
                class=$(($class - 16))
                offset=256
                mult=2