Date: Fri, 19 Apr 2002 23:35:22 -0400 From: Tom Limoncelli <tal@lumeta.com> To: freebsd-hardware@FreeBSD.ORG Subject: 4.5 MAKEDEV is buggy for RocketPorts Message-ID: <3CC0E1FA.8020900@lumeta.com>
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Hi!
The code in /dev/MAKEDEV to create the cuaR* and ttyR* devices is
broken. This is likely because so few people use RocketPort serial
ports with FreeBSD (I wish they'd contribute a newer driver!)
There are 2 bugs:
1) MAKEDEV assumes that only one "RocketPort = 32" will appear in the
output of dmesg. I fixed this by passing the output of dmesg through
"sort -u", but there has got to be a better way. (my ugly patch is
below). Without this patch, $ndevices="32\n32\n32\n32\n" instead of
"32", similar problem with $controllers. The final patch should handle
the situation where multiple controller cards are installed.
2) The code relies on "dmesg" to find out what controllers exist. I
consider this to be a problem, albiet minor. If the machine hasn't been
rebooted in long enough that dmesg no longer mentions "RocketPort0 = 32"
(or whatever) then the script fails. (Hey, it actually happened to me.
I had a machine up for something like 6 months before I went to run
MAKEDEV). I don't see any other use of "dmesg" in MAKEDEV.
--Tom
# diff -cw /tmp/MAKEDEV /dev/MAKEDEV
*** /tmp/MAKEDEV Mon Jan 28 08:13:17 2002
--- /dev/MAKEDEV Fri Apr 19 18:13:50 2002
***************
*** 1404,1410 ****
BOARD=1; Rnum=0
MINOR=$(($BOARD * 65536))
controllers=$(
! dmesg | while read first rest; do
case "$first" in
RocketPort[0-4])
echo "$first"
--- 1404,1410 ----
BOARD=1; Rnum=0
MINOR=$(($BOARD * 65536))
controllers=$(
! dmesg | /usr/bin/sort -u | while read first rest; do
case "$first" in
RocketPort[0-4])
echo "$first"
***************
*** 1415,1421 ****
rm -f ttyR* ttyiR* ttylR*
for i in $controllers; do
ndevices=$(
! dmesg | while read first bar ports rest; do
case "$first" in
$i*)
echo "$ports"
--- 1415,1421 ----
rm -f ttyR* ttyiR* ttylR*
for i in $controllers; do
ndevices=$(
! dmesg | /usr/bin/sort -u | while read first bar ports
rest; do
case "$first" in
$i*)
echo "$ports"
***************
*** 1444,1450 ****
BOARD=1; Rnum=0
MINOR=$(($BOARD * 65536))
controllers=$(
! dmesg | while read first rest; do
case "$first" in
RocketPort[0-4])
echo "$first"
--- 1444,1450 ----
BOARD=1; Rnum=0
MINOR=$(($BOARD * 65536))
controllers=$(
! dmesg | /usr/bin/sort -u | while read first rest; do
case "$first" in
RocketPort[0-4])
echo "$first"
***************
*** 1455,1461 ****
rm -f cuaR* cuaiR* cualR*
for i in $controllers; do
ndevices=$(
! dmesg | while read first bar ports rest; do
case "$first" in
$i*)
echo "$ports"
--- 1455,1461 ----
rm -f cuaR* cuaiR* cualR*
for i in $controllers; do
ndevices=$(
! dmesg | /usr/bin/sort -u | while read first bar ports
rest; do
case "$first" in
$i*)
echo "$ports"
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