(old)Puppy Linux Discussion Forum

goingnuts wrote:PANZERKOPF: Never got mdev working...tried you scripts (deactivated udevd in init), run rc.mdev afterlogin. Had to add groups disk, uucp, cdrom and video. Then only minor warnings running mdev -s or rc.mdev.
But no drivers loaded afterwards...
When to launch rc.mdev? Do you need additional scripts/setup?

PANZERKOPF wrote: Attached tarball contains this script and
busybox configuration file.

Ibidem wrote:Looking at the mdev scripts, I see a couple things...
1. mdev.conf is missing this section (from examples/mdev_fat.conf in the busybox source):

Code: Select all

# Syntax:
# [-]devicename_regex user:group mode [>|=path] [@|$|*cmd args...]
#
# =: move, >: move and create a symlink
# @|$|*: run $cmd on delete, @cmd on create, *cmd on both

# support module loading on hotplug
$MODALIAS=.*	root:root 660 @modprobe "$MODALIAS"

This is what handles hotplug module loading, which is important.

Ibidem wrote: 4. Alpine uses/used something like:

Code: Select all

find /sys -name modalias |xargs sort -u |xargs modprobe -a -b

to load modules for devices that aren't hotplugged. This should really speed things up.
And to coldplug USB devices, you may need this:

Code: Select all

	# mdev -s will not create /dev/usb[1-9] devices with recent kernels
	# so we trigger hotplug events for usb for now
	for i in $(find /sys/devices -name 'usb[0-9]*'); do
		[ -e $i/uevent ] && echo add > $i/uevent
	done

greengeek wrote:The rc.shutdown is very much simpler than some of the puppy shutdown scripts I have been looking at recently. Where would you use this? Is it taken from another distro or would it work in a cutdown puppy?

PANZERKOPF wrote:

Ibidem wrote: 4. Alpine uses/used something like:

Code: Select all

find /sys -name modalias |xargs sort -u |xargs modprobe -a -b

to load modules for devices that aren't hotplugged. This should really speed things up.
And to coldplug USB devices, you may need this:

Code: Select all

	# mdev -s will not create /dev/usb[1-9] devices with recent kernels
	# so we trigger hotplug events for usb for now
	for i in $(find /sys/devices -name 'usb[0-9]*'); do
		[ -e $i/uevent ] && echo add > $i/uevent
	done

I learned Alpine scripts before making my one. That script unfortunately cannot detect
all devices plugged in my test boxes (like Broadcom wireless card).
Some devices hasnt modalias file in /sys directory but has uevent with modalias string inside.
Also, my version based on "pure shell", no grep, find, xargs etc. That is not important but
should be faster (IMHO)

find /sys/devices -name uevent | xargs grep -h MODALIAS 2>/dev/null |cut -d = -f 2 

#!/bin/sh

#is there really a reason to try twice?
for ONEBUS in /sys/bus/* /sys/bus/*; do
    for ONEDEVICE in ${ONEBUS}/devices/*; do
	[ -r ${ONEDEVICE}/uevent ] || continue
	while read ONEUEVENTSTR; do
	    case $ONEUEVENTSTR in
		MODALIAS=*)
		    echo ${ONEUEVENTSTR#MODALIAS=} 2>/dev/null
		;;
		*)
		    continue
		;;
	    esac
	done < ${ONEDEVICE}/uevent
    done
done

grep -h MODALIAS /sys/bus/*/devices/*/uevent 2>/dev/null |cut -d = -f 2

find /sys -name uevent -exec echo add > {} \;

goingnuts wrote:PANZERKOPF: Never got mdev working...tried you scripts (deactivated udevd in init), run rc.mdev afterlogin. Had to add groups disk, uucp, cdrom and video. Then only minor warnings running mdev -s or rc.mdev.
But no drivers loaded afterwards...
When to launch rc.mdev? Do you need additional scripts/setup?

Btw. diethotplug is an other close to udevd replacement.

Ibidem wrote: But udev/eudev provide one thing the other solutions don't: they can enumerate devices, which is what Xorg wants them for.

technosaurus wrote:Is it glibc issue or is it picking up library paths from the build environment with gcc?

/lib:
/usr/lib:
/usr/X11R7/lib:
/opt/qt4/lib:
/opt/mozilla.org/lib:
/root/my-applications/lib:
/usr/lib/tls: (hwcap: 0x8000000000000000)

/lib
/usr/lib
/usr/X11R7/lib
/opt/qt4/lib
/opt/mozilla.org/lib
/opt/samba/lib
/root/my-applications/lib

If this stuff is causing you a problem, you can turn it off by patching dl-procinfo.h in glibc

#ifndef PROCINFO_DECL
= {
    "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
    "cx8", "apic", "10", "sep", "mtrr", "pge", "mca", "cmov",
    "pat", "pse36", "pn", "clflush", "20", "dts", "acpi", "mmx",
    "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe"
  }
#endif

GNU C Library stable release version 2.6.1, by Roland McGrath et al.
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.2.2.
Compiled on a Linux >>2.6.21.7<< system on 2007-10-18.
Available extensions:
crypt add-on version 2.1 by Michael Glad and others
Native POSIX Threads Library by Ulrich Drepper et al
BIND-8.2.3-T5B
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.