Linux Kernel in a Nutshell
by Greg Kroah-Hartman

The unconfirmed error reports are from readers.  They have not yet been 
approved or disproved by the author or editor and represent solely the
opinion of the reader.

Here's a key to the markup:
        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification

This page was updated April 18, 2007.


UNCONFIRMED  errors and comments from readers: 


(9) Footnote;
You could add that Fedora Core also calls the package "quota."


[16] 1;
How can tar -xzvf linux-2.6.17.8.tar.gz work when this file is no
longer available? The options -xzvf don't work with bunzip2 (isn't 
normal). Please, tell me how to continue the installation using 
the file linux-2.6.20.6.tar.bz2.


{48}  7th line from the bottom;
Very very minor technical addition:
>> $ find -type f -name Makefile | xargs grep e1000
Without the -i option to grep, this doesn't work for strings like "via_rhine".
But to follow the possible intention, there could be a hint to change non-
alphanumerical chars to "." an use egrep like this:
>> $find -type f -name Makefile | xargs egrep via.rhine



{56}  4th paragraph, line 20;
>> Now that we have the driver name,...
A little annotation to the filename would be nice, because only the corresponding
object-file does appear in the Makefile.
So one could search for the filename without the suffix.
The referred first section was about a dirname.



{62}  9th line from the bottom;
get-driver.sh doesn't always treat possible spaces in sysfs-filenames correctly:

This example tests "/sys/bus/pci/drivers/Intel ICH/module" for existance:
$ ./get-driver.sh adsp
    looking at sysfs device: /sys/class/sound/adsp
    follow 'device' link to parent: /sys/devices/pci0000:00/0000:00:1f.5
    found driver: Intel./get-driver.sh: line 63: test: /sys/bus/pci/drivers/Intel:
binary operator expected

Even on my system there are 4 additional filenames with spaces in that (and only
that) directory. So only the critical hunk would be:


--- get-driver-orgy.sh 2007-01-20 15:08:03.000000000 +0100
+++ get-driver.sh 2007-01-20 15:08:03.000000000 +0100
@@ -60,8 +60,8 @@
   DRIVERPATH=$(readlink -f $DEVPATH/driver)
   DRIVER=$(basename $DRIVERPATH)
   echo -n "found driver: $DRIVER"
-  if test -e $DRIVERPATH/module; then
-   MODULEPATH=$(readlink -f $DRIVERPATH/module)
+  if test -e "$DRIVERPATH/module"; then
+   MODULEPATH=$(readlink -f "$DRIVERPATH/module")
    MODULE=$(basename $MODULEPATH)
    echo -n " from module: $MODULE"
   fi

For convenience, here the full listing with some more quotes and cites:
#=================================================================================
#!/bin/sh
#
# Find all modules and drivers for a given class device.
#

if [ $# != "1" ] ; then
 echo
 echo "Script to display the drivers and modules for a specified sysfs class device"
 echo "usage: $0 <CLASS_NAME>"
 echo
 echo "example usage:"
 echo "      $0 sda"
 echo "Will show all drivers and modules for the sda block device."
 echo
 exit 1
fi

DEV=$1

if test -e "$1"; then
 DEVPATH=$1
else
 # find sysfs device directory for device
 DEVPATH=$(find /sys/class -name "$1" | head -1)
 test -z "$DEVPATH" && DEVPATH=$(find /sys/block -name "$1" | head -1)
 test -z "$DEVPATH" && DEVPATH=$(find /sys/bus -name "$1" | head -1)
 if ! test -e "$DEVPATH"; then
  echo "no device found"
  exit 1
 fi
fi

echo "looking at sysfs device: $DEVPATH"

if test -L "$DEVPATH"; then
 # resolve class device link to device directory
 DEVPATH=$(readlink -f "$DEVPATH")
 echo "resolve link to: $DEVPATH"
fi

if test -d "$DEVPATH"; then
 # resolve old-style "device" link to the parent device
 PARENT="$DEVPATH";
 while test "$PARENT" != "/"; do
  if test -L "$PARENT/device"; then
   DEVPATH=$(readlink -f "$PARENT/device")
   echo "follow 'device' link to parent: $DEVPATH"
   break
  fi
  PARENT=$(dirname "$PARENT")
 done
fi

while test "$DEVPATH" != "/"; do
 DRIVERPATH=
 DRIVER=
 MODULEPATH=
 MODULE=
 if test -e "$DEVPATH/driver"; then
  DRIVERPATH=$(readlink -f "$DEVPATH/driver")
  DRIVER=$(basename "$DRIVERPATH")
  echo -n "found driver: $DRIVER"
  if test -e "$DRIVERPATH/module"; then
   MODULEPATH=$(readlink -f "$DRIVERPATH/module")
   MODULE=$(basename "$MODULEPATH")
   echo -n " from module: $MODULE"
  fi
  echo
 fi

 DEVPATH=$(dirname "$DEVPATH")
done



{88}  3rd paragraph;
where it says: /sys/module/usbcore/blinkenlights
it should say: /sys/module/usbcore/parameters/blinkenlights
(at least for kernel 2.6.17)


(121) 2nd heading, "Architecture-specific targets", table 10-8;

last row in table 10-8:
<quote>
isoimage Creates a CD-ROM boot image and places it in the file arch/i396/boot/image.iso. The syslinux
package must be present on your system in order for this to work properly.
</quote>

arch/i396/boot/image.iso should be arch/i386/boot/image.iso