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Garbz
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Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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 Posted: Tue Jul 29, 2003 5:47 am Post subject: Selecting Runlevel at boot (good for laptops) |
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If you are like me than u can't stand waiting for your laptop to bootup because eth0 is trying to be started while the network cable is unplugged.
Likewise you couldn't be bothered starting net.eth0 after every boot if it isn't already set at default. There had to be a better way.
This is kinda stupid, but u know what they say: "If it's stupid but it works, it's not stupid!"
Basically with the help of an rc init script which is run at the boot runlevel it is possible to select which runlevel to start at boottime by passing cmdline options to the kernel. (also i've heard this is a bad way to do things, but hey it works.)
Here's how:
Gentoo runs on name based runlevels. On a default config init starts and begins with the runlevel called "boot". When boot is completed init moves to runlevel 3 and as per default starts everything in the "default" runlevel.
What i have done is made a script which during "boot" modifies "/etc/runlevels/default" before they are started to selectivly add programs to startup. The script is nasty, it's badly written (i know nothing about bash this was my first ever attempt and could be MUCH nicer).
So the steps involved:
1. in /etc/runlevels/ are several directories representing the different runlevels for the bootup. "boot" "default" etc. each directory contains symbolic links to /etc/init.d/filename to start and stop programs.
Simply add two new folders: "normal" and "offline" (could be different but YOU would need to modify the script). in these folders use the rc-update command to add things to runlevels:
e.g. | Code: | rc-update add vcron normal
rc-update add net.eth0 normal
rc-update add sshd normal
rc-update add samba normal
rc-update add vcron offline |
2. Take the following script and place it into /etc/init.d/bootlevel
| Code: | #!/sbin/runscript
depend() {
need localmount
}
start() {
ebegin "Setting the runlevel according to cmdline args"
if ! grep "runlevel" /proc/cmdline > /dev/null ;
then
eend 2 "Failed sanity check!"
else
RUNLEVEL="`cat /proc/cmdline |sed -e 's/.*runlevel=//' |gawk '{print $1}'`"
if [ $RUNLEVEL = "normal" ] ;
then
rm /etc/runlevels/default/*
cp -d /etc/runlevels/normal/* /etc/runlevels/default
else
if [ $RUNLEVEL = "offline" ] ;
then
rm /etc/runlevels/default/*
cp -d /etc/runlevels/offline/* /etc/runlevels/default
else
eend 1 "Failed to interperate runlevel!"
fi
fi
eend $?
fi
} |
For thoes that can read it it's kinda obvious and simple what it does, for thoes that can't:
This script reads /proc/cmdline and searches for the runlevel=runlevel command. it then checks runlevel with an if-then and proceeds to clear the /etc/runlevels/default directory, and then copy the symbolic links from /etc/runlevels/runlevel directory into the default directory.
The end result is when initlevel 3 is started the programs from runlevel not from default are exectuted.
/EDIT: --------Thanks to bblt for pointing this out:--------
We want the script to start at the boot runlevel (i.e. before runlevel 3 "default" actually starts). So run this command | Code: | | rc-update add bootlevel boot |
3. The final step is to edit the bootmenu (/etc/grub/menu.lst or grub.conf depending on how it's setup). and append the desired runlevel to the boot:
| Code: | default 0
timeout 30
splashimage=(hd0,1)/splash.xpm.gz
color dark-gray/black black/light-gray
title=Gentoo Linux 1.4rc5 (Normal)
root (hd0,1)
kernel /bzImage root=/dev/hda4 vga=791 video=vesa:1024x768@70 runlevel=normal
initrd /initrd
title=Gentoo Linux 1.4rc5 (Offline)
root (hd0,1)
kernel /bzImage root=/dev/hda4 vga=791 video=vesa:1024x768@70 runlevel=offline
initrd /initrd
title=Windows XP
rootnoverify (hd0,0)
chainloader (hd0,0)+1
title=Gentoo Linux 1.4rc5 (Emergancy)
root (hd0,1)
kernel /bzImage root=/dev/hda4 console=tty0 console=ttyS0,115200n8 single |
There you have it. Depending which option is selected depends on which directory is copied into "default" and therefore which programs are executed at boot. No more waiting 15sec for eth0 to timeout when not online.
Any thoughs? I know this is not the best way to do things. It there was an easier way let me know, If you have any sugestions let me know. Otherwise enjoy.
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Every begining is another begining's end.
Last edited by Garbz on Sat Aug 02, 2003 2:37 am; edited 1 time in total |
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zhenlin
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Joined: 09 Nov 2002
Posts: 1361
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| Posted: Tue Jul 29, 2003 6:16 am Post subject: |
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Nice, but an better way is to have it after the kernel boots, a la Windows 2000, so that people who forget to select the runlevel don't get penalised.
Change
| Code: |
if [ -z "${argv1}" ]
then
if [ -f "${svcdir}/softlevel" ]
then
export SOFTLEVEL="$(< ${svcdir}/softlevel)"
else
export SOFTLEVEL="boot"
fi
else
export SOFTLEVEL="${argv1}"
fi
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| Code: |
if [ -z "${argv1}" ]
then
if [ -f "${svcdir}/softlevel" ]
then
export SOFTLEVEL="$(< ${svcdir}/softlevel)"
else
export SOFTLEVEL="boot"
fi
else
if [ "${argv1}" = "choose" ]
then
# Insert magic here.
export SOFTLEVEL="${SELECTION}"
else
export SOFTLEVEL="${argv1}"
fi
fi
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Unfortunately dialog is located in /usr/bin, so we have to resort to some other form of UI. Also, it would be nice if the configuration for the runlevel chooser includes a timeout and a default. |
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Garbz
Apprentice
Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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| Posted: Tue Jul 29, 2003 11:40 am Post subject: |
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In the current setup the user is not penalised if runlevel is not set, If the runlevel is absent or incorrect nothing is copied and an errror is brought up during boot. In which case the last settings under default are automatically kept.
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zhenlin
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Joined: 09 Nov 2002
Posts: 1361
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| Posted: Tue Jul 29, 2003 12:07 pm Post subject: |
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| Ah, I misunderstood your code, I thought that it was halting the whole boot process... |
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Garbz
Apprentice
Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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| Posted: Tue Jul 29, 2003 3:34 pm Post subject: |
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| zhenlin wrote: | | Ah, I misunderstood your code |
 That's fine like i said it's poorly written crap that i came up with as a quick fix.
No it just runs at boot time and copies a few files that's it.
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bblt
n00b
Joined: 31 Jul 2003
Posts: 10
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| Posted: Thu Jul 31, 2003 9:25 am Post subject: |
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Excellent! This was just the thing I needed. It seemed strange to me that Gentoo had no way to specify different runlevels from grub, but this works well. I wanted to change it a bit so that I could use arbitrary runlevels (in my case, for using bootsplash or not) instead of your hard-coded ones, but I don't really know any bash, so I tried not to change the code that I didn't understand. Anyway, here's the code for /etc/init.d/bootlevel:
| Code: |
#!/sbin/runscript
depend() {
need localmount
}
start() {
ebegin "Setting the runlevel according to cmdline args"
if ! grep "runlevel" /proc/cmdline > /dev/null ;
then
RUNLEVEL='normal';
else
RUNLEVEL="`cat /proc/cmdline |sed -e 's/.*runlevel=//' |gawk '{print $1}'`"
fi
case /etc/runlevels/{$RUNLEVEL} in
/etc/runlevels/*)
rm /etc/runlevels/default/*
cp -d /etc/runlevels/{$RUNLEVEL}/* /etc/runlevels/default;;
*)
eend 1 "Failed to interpret runlevel!";;
esac
eend $?
}
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As long as the value that you use for 'runlevel=' is in the /etc/runlevel directory, it should work ok.
Also, I changed the behavior without any 'runlevel=' option to run the normal level, so if you copy your old default runlevel to normal,
| Code: |
cp -r /etc/runlevels/default /etc/runlevels/normal
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all your old grub entries should work without change.
I thought that linking default to the current runlevel might be a nicer way of doing this, but really this works fine as is, and I'm too lazy to try to change it. |
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wilburpan
l33t
Joined: 21 Jan 2003
Posts: 977
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| Posted: Thu Jul 31, 2003 6:32 pm Post subject: |
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This is really useful information to have, but there is a much easier way of fixing your initial problem:
You can edit the command that sets up your network card in /etc/conf.d/net to adjust the timeout period. Here's the relevant part of mine:
| Code: | # /etc/conf.d/net:
# For DHCP set iface_eth? to "dhcp"
# For passing options to dhcpcd use dhcpcd_eth?
#
iface_eth0="dhcp"
dhcpcd_eth0="-t 10"
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The "-t 10" option sets the timeout to 10 seconds. The default is 60 seconds. So if my laptop is not hooked up to a network, there's just a 10 second wait and then the boot process continues as usual. You can of course set -t to whatever you want.
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Garbz
Apprentice
Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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| Posted: Fri Aug 01, 2003 7:10 am Post subject: |
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THanks for the info. But it's not just network card. There's services i don't need when im not on the network simple as that.
Plus this has countless uses as well.
Also i like the idea of the script, but the point of leaving unchanged if the runlevel option is incorrect or missing, is for safty. What if the error is that the normal directory is missing ?
Then the program would fail. I personally think it's safter to in the absence of a specified runlevel to simply boot whatever's in the directory and warn the user.
BTW ur copy of the script didn't work for me. I'll investigate this further, it may just be my computer but dependancies failed EVERYWHERE.
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Garbz
Apprentice
Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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| Posted: Fri Aug 01, 2003 8:16 am Post subject: |
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Ok got it working now. Stupid file had dos line endings. Converted to unix and noticed only 1 problem
The {$RUNLEVEL} should be $RUNLEVEL. I don't know why, i know in bash the { } work fine but the script itself failed saying
can't find /etc/runlevels/{offline}/*
so here's an updated working script. Thanks for ur input:
| Code: |
#!/sbin/runscript
depend() {
need localmount
}
start() {
ebegin "Setting the runlevel according to cmdline args"
if ! grep "runlevel" /proc/cmdline > /dev/null ;
then
RUNLEVEL='normal';
else
RUNLEVEL="`cat /proc/cmdline |sed -e 's/.*runlevel=//' |gawk '{print $1}'`"
fi
case /etc/runlevels/$RUNLEVEL in
/etc/runlevels/*)
rm -f /etc/runlevels/default/*
cp -d /etc/runlevels/$RUNLEVEL/* /etc/runlevels/default
;;
*)
eend 1 "Failed to interpret runlevel!"
;;
esac
eend $?
}
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Also does anybody know how to write and rcscript like this so that it displays a warning when it aborts rather than an error. I know eend 0 is sucess. but i don't necessaraily need a error.
I prefer to set it to abort the script if the runlevel is absent. so rather than
"RUNLEVEL=normal"
have "eend [an error code] "Runlevel not specified, aborted!" "
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bblt
n00b
Joined: 31 Jul 2003
Posts: 10
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| Posted: Sat Aug 02, 2003 2:01 am Post subject: |
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Ahh, thanks for that correction, I had a feeling there might be a problem with my script.
BTW, I noticed that in your step-by-step instructions, you didn't put down the step: | Code: | | rc-update add bootlevel boot |
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Garbz
Apprentice
Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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| Posted: Sat Aug 02, 2003 2:38 am Post subject: |
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thanks for that i edited the original post.
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fishhead
Apprentice
Joined: 07 Mar 2003
Posts: 162
Location: Pasadena, CA
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| Posted: Mon Aug 04, 2003 3:25 am Post subject: |
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I came across this after I wrote a script that lets you do similar things but functions in a slightly diffrent way. I replaced the default runlevel with one that instead presents a dialog that lets you pick the runlevel.
Here is the script:
| Code: | #!/sbin/runscript
# Copyright 2003 Joshua Goldstein
# Distributed under the terms of the GNU General Public License, v2
# This comes with NO WARRENTY
depend() {
need localmount
}
start() {
ebegin "Starting locate"
echo > /tmp/run
(
# this is needed to prevent xargs from complaining about the environment being too large and is probably overkill. Its in a subshell, so no harm done.
unset get_options depinfo_modules depinfo_rsyncd depinfo_distccd get_KV ebegin mark_service_started trace_depend eend depinfo_keymaps schedule_service_startup runlevel_stop depinfo_localmount esyslog stop-daemons mark_service_stopped needsme iuse depinfo_aumix depinfo_checkfs runlevel_start depinfo_bootmisc depinfo_portmap depinfo_locate depinfo_metalog depinfo_iptables depinfo_domainname depinfo_samba depinfo_nfsmount depinfo_winbind depinfo_netDOTlo depinfo_cupsd depinfo_rmnologin depinfo_xfs depinfo_sshd depinfo_acpid stop-single-daemon depinfo_switch getcols query_before depinfo_netmount wrap_rcscript valid_iafter depinfo_netDOTppp0 depinfo_diald iafter checkserver service_started depinfo_local depinfo_hdparm getpidfile net_service depinfo_urandom depinfo_nscd depinfo_net depinfo_numlock depinfo_vcron depinfo_netDOTeth0 depinfo_cryptoDASHloop get_options depinfo_modules depinfo_rsyncd depinfo_distccd get_KV ebegin mark_service_started trace_depend eend depinfo_keymaps schedule_service_startup runlevel_stop depinfo_localmount esyslog stop-daemons mark_service_stopped needsme iuse depinfo_aumix depinfo_checkfs runlevel_start usesme depinfo_serial depinfo_checkroot service_failed depinfo_xdm depinfo_clock depinfo_gkrellmd dependon depinfo_nfs ewarn einfon depinfo_consolefont checkpid query_after list_depend_trace depinfo_powermond mark_service_failed einfo stop_service depinfo_esound depinfo_hostname getcols query_before depinfo_netmount wrap_rcscript valid_iafter depinfo_netDOTppp0 depinfo_diald iafter checkserver service_started depinfo_local depinfo_hdparm getpidfile net_service depinfo_urandom depinfo_nscd depinfo_net depinfo_numlock depinfo_vcron depinfo_netDOTeth0 depinfo_cryptoDASHloop depinfo_gpm start-single-daemon
echo $dialog_args | sed -e 's/"/\\"/g' | xargs -P 0 echo --no-cancel --title \"Please select a runlevel\" --radiolist \"These are the available runlevels\" 25 75 20 | xargs -P 0 dialog 2>/tmp/run
if [[ $? != 0 ]]
then
echo $default_level > /tmp/run
fi
)
runlevel=`cat /tmp/run`
if [[ ! $runlevel ]]
then
runlevel=$default_level
fi
if [[ ! $debug_locate ]]
then
maplinks -q /etc/maplinks/$runlevel
/sbin/rc $runlevel
else
echo "I Would run maplinks -q /etc/maplinks/$runlevel"
echo "I Would run /sbin/rc $runlevel"
fi
eend 0
}
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An example configuration:
| Code: | #
# Locate config
#
#dialog_args : arguments to the dialog box, be sure to only quote and have the quotes properly escaped. The runlevel names must be EXACTLY the same as the options here. (i.e. moble means that you _MUST_ have a moble runlevel if you want it to work.)
# a valid example would be...
#dialog_args="home \"Setup for the house\" off moble \"Moble setup\" on"
# default_level : the default runlevel
#default_level="moble"
# Set this to only echo, and not actualy change runlevels
#debug_locate="true"
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The maplinks script needed for the above to work:
| Code: | #!/usr/bin/perl
# Copyright 2003 Joshua Goldstein
# Distributed under the terms of the GPL v2
# This comes with NO WARRENTY
#
# maplinks - a script that sets up a bunch of links to files
#
# Entry format is tab-delimited:
# (hardlink|symlink|force-hardlink|force-symlink) link_destination to link_source
sub process_args;
@options = process_args( @ARGV );
# Don't say anything .....
if ( $options[0] eq "quiet" )
{
close( STDERR );
open(STDERR,'>','/dev/null');
}
if (-r $options[1])
{
open(STDIN,'<',$options[1]) or die("Can't open file");
$line_num = 1;
LINE:
while(<STDIN>)
{
my $ln_command = 'ln';
$line = $_;
chomp($line);
@action = split(/\t/,$line);
if($#action != 3)
{
print STDERR "Invalid line: " . $line_num . "\n";
$line_num++;
next LINE;
}
# First entry
SWITCH:
{
if ($action[0] eq "hardlink") { last SWITCH; }
if ($action[0] eq "force-hardlink") { $ln_command .= " -f"; last SWITCH; }
if ($action[0] eq "symlink") { $ln_command .= " -s"; last SWITCH; }
if ($action[0] eq "force-symlink") { $ln_command .= " -f -s"; last SWITCH; }
print STDERR "Invalid action, line " . $line_num . "\n";
$line_num++;
next LINE;
}
if (-e $action[3])
{
$ln_command .= " " . $action[3] . " " . $action[1];
}
else
{
print STDERR "Source file " . $action[3] . " does not exist\n";
$line_num++;
next LINE;
}
my $status = system($ln_command);
$line_num++;
}
}
else { print STDERR "Can't open file!\n"; exit(2); }
exit(0);
sub process_args #processes the args and returns the input / output files and text flags
{
sub output_help_message # add something to compile last modified file
{
print(<STDERR>,"usage:\t$0 \[-q\] filename\n");
exit(0);
}
my @args = @_;
my @returnlist = ("not quiet","None");
for(my $c=0; $c<=$#args; $c++)
{
my $p = $args[$c];
if($p =~ /^(--help|-h)$/)
{
output_help_message;
}
elsif($p =~ /^-q$/ && $c==0)
{
$returnlist[0] = "quiet";
}
elsif($c==$#args)
{
$returnlist[1] = $args[$c];
}
else
{
print(<STDERR>,"Unknown option or invalid option usage $p\n");
exit(1);
}
}
return @returnlist;
}
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Of course, you'll need to rewrite the config files that you use the symlinks on to run in each seperate location, but that is not at all hard. The board seems to not like some of my formating. I have all of these on my website. |
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Garbz
Apprentice
Joined: 02 Jul 2003
Posts: 260
Location: Brisbane, Australia
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| Posted: Mon Aug 04, 2003 9:46 am Post subject: |
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That is ... BIG.
I'm not even going to try and actually read that (cause i dont' have time not because i can't). But i like the menu idea. I think that would especially usefull for thoes who wish to choose several runlevels, and don't want to fill up the grub menu, and for thoes who are religiously against adding stuff to cmdline args.
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fishhead
Apprentice
Joined: 07 Mar 2003
Posts: 162
Location: Pasadena, CA
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| Posted: Tue Aug 26, 2003 5:07 pm Post subject: |
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Here's a less kludgy solution to the original problem of xargs giving an 'envronment too large' error .... you should probably replace my older script with this ....
| Code: | #!/sbin/runscript
# Copyright 2003 Joshua Goldstein
# Distributed under the terms of the GNU General Public License, v2
# This comes with NO WARRENTY
depend() {
need localmount
}
start() {
ebegin "Starting locate"
echo > /tmp/run
echo $dialog_args | sed -e 's/"/\\"/g' | env -i xargs -P 0 echo --no-cancel --title \"Please select a runlevel\" --radiolist \"These are the available runlevels\" 25 75 20 | env -i xargs -P 0 dialog 2>/tmp/run
if [[ $? != 0 ]]
then
echo $default_level > /tmp/run
fi
runlevel=`cat /tmp/run`
if [[ ! $runlevel ]]
then
runlevel=$default_level
fi
if [[ ! $debug_locate ]]
then
maplinks -q /etc/maplinks/$runlevel
/sbin/rc $runlevel
else
echo "I Would run maplinks -q /etc/maplinks/$runlevel"
echo "I Would run /sbin/rc $runlevel"
fi
eend 0
}
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vhkristof
Apprentice
Joined: 21 Jun 2003
Posts: 211
Location: Achel, Limburg, Belgium
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| Posted: Fri Oct 31, 2003 11:12 am Post subject: |
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Seems like this ain't necessary anymore with the new 2.6 kernels...
BTW: why not use nonetwork in /etc/runlevels? |
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chimy
n00b
Joined: 24 Jul 2003
Posts: 19
Location: Zürich, Switzerland
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| Posted: Sun Nov 16, 2003 12:31 pm Post subject: |
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erm... I got lilo  any ideas for a lilo.conf? Im gonna search the web for stuff like this.
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http://www.blender3d.ch/ |
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optilude
Apprentice
Joined: 29 May 2002
Posts: 248
Location: England
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| Posted: Sun Nov 16, 2003 12:56 pm Post subject: A better solution? |
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I prefer to use my hprofile scripts, which can be found here:
https://forums.gentoo.org/viewtopic.php?t=46180
I think the advantages are:
o It can switch configuration files depending on your hardware profile, not just bootup services. I use this when I'm in VMWare for Windows and want to boot Gentoo to have XF86Config, /etc/conf.d/net and other files automatically find versions appropriate for the current profile. The same might apply to different hardware configurations (e.g. if you're in a docking station, you may want X to default to an external mouse, else it should use your touchpad). This can also be applied to individual users' files in their home directories.
o It can selectively load modules by switching around /etc/modules.autoload.d/kernel-2.6 (or -2.4) for you before the modules are loaded at boot.
o The profile can be determined through a simple script, /etc/hprofile/pdet. You could launch a menu here, check the kernel command line, grep the output of demsg to look for kernel messages giving the profile away, or do anything else that may be appropriate.
It uses the same idea as you - different directories in /etc/runlevels, and a startup script called hprunlevel will select the approriate one - once the profile has been determined, it's all automagic.
NOTE: Read the update to my original hprofile post about critical services and /etc/runlevels/boot/.critical!
Hope other people find it useful!
Martin
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k-dub
n00b
Joined: 18 Feb 2003
Posts: 67
Location: Frederick, CO
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| Posted: Mon Dec 22, 2003 4:15 pm Post subject: |
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I was tempted to hack my startup scripts to allow choosing the runlevel at boot time by reading /proc/cmdline, until I started looking at the startup scripts.
I opened /sbin/rc and noticed it was calling "source /sbin/functions.sh" and later referring to "BOOTLEVEL" and "SOFTLEVEL". This sounded promising, so I opened /sbin/functions.sh and learned that both are set by reading /proc/cmdline. I created a "console" runlevel and added all the same services as my default runlevel except for "xdm". I then rebooted and passed "softlevel=console" at bootup. I was NOT taken to my normal KDM login screen, I was given a login prompt in console mode - IT WORKED!
Use "softlevel=" in your boot loader or pass it in manually and you will reach the desired runlevel, no hacking required. |
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petardi
Tux's lil' helper
Joined: 29 Mar 2003
Posts: 79
Location: SI
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| Posted: Mon Dec 22, 2003 5:15 pm Post subject: |
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Another solution would be to use ifplugd. It brings up the network interfaces only when the cable is plugged in. It brings them down, when the cable is plugged out.
I don't use different services for online and offline use, so I haven't investigated this further. I guess some fiddling with dependencies should make it possible to bring up other services too. |
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zojas
Veteran
Joined: 22 Apr 2002
Posts: 1138
Location: Phoenix, AZ
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| Posted: Mon Dec 22, 2003 7:48 pm Post subject: |
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the 'softlevel=foo' thing is awesome. 
but, when I switch to different runlevels, I need different values to be in /etc/conf.d/net; when I'm at home I use eth1 (wireless), when I'm at work I use only eth0 (wired).
my current solution has 'default' with no networking at all. then after boot I log in as root and run a perl script which adjusts /etc/conf.d/net, adjusts my proxy settings, adjusts my /etc/resolv.conf, and then changes to a different named runlevel. it works, but it would be nicer to just pick a different boot target.
I guess I could write a bash script in /etc/init.d, and set net.ethX to depend on it...I hadn't thought of that before. then I could have a separate script in each runlevel, and use the 'softlevel' at boot time to pick. at other times, all I would have to do would be to run 'rc'
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optilude
Apprentice
Joined: 29 May 2002
Posts: 248
Location: England
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| Posted: Mon Dec 22, 2003 8:03 pm Post subject: |
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| zojas wrote: | | my current solution has 'default' with no networking at all. then after boot I log in as root and run a perl script which adjusts /etc/conf.d/net, adjusts my proxy settings, adjusts my /etc/resolv.conf, and then changes to a different named runlevel. it works, but it would be nicer to just pick a different boot target. |
This is exactly the kind of problem hprofiles solves. The new version, with multiple profile types, better automatic switching, running of arbitrary scritps when profiles are applied or replaced, and more, can be found at http://hprofile.sourceforge.net.
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k-dub
n00b
Joined: 18 Feb 2003
Posts: 67
Location: Frederick, CO
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| Posted: Tue Dec 23, 2003 6:56 am Post subject: |
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| zojas wrote: | | when I switch to different runlevels, I need different values to be in /etc/conf.d/net; when I'm at home I use eth1 (wireless), when I'm at work I use only eth0 (wired). |
You might try Quickswitch http://muthanna.com/quickswitch.
It can replace system files with specific versions of them, set ALL your network settings, and even accepts boot-time commands. It's been a great find for me, because I struggled to get my wireless card to work for a long time, now I can switch all my settings in two seconds. |
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optilude
Apprentice
Joined: 29 May 2002
Posts: 248
Location: England
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| Posted: Tue Dec 23, 2003 2:26 pm Post subject: |
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k-dub, how did you find quickswitch integrating with the gentoo boot scripts in /etc/init.d/net.*? I tried it briefly and got frustrated as it seemed to start dhcpcd etc. on its own accord. I also found the configuration file long and confusing (or rather, it seemed to be geared towards RedHat). I've since extended hprofile (http://hprofile.sf.net) to make it more general, and found it easier to set up than quickswitch in Gentoo. (the hprofile tarball comes with my Gentoo init scripts and sample profiles).
Just wondering how quickswitch stacks up against hprofile. When I used it, I had the feeling I could make it do what hprofile does but that it would be more complicated because quckswitch seems to make assumptions about what it takes to start/stop your network interfaces etc. When using hprofile, I simply rely on the Gentoo init scripts to bring network interfaces up or down (I can switch /etc/conf.d/net around depending on the current profile), which seems safer to me. Or have I got quickswitch wrong?
Martin
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twiggy
n00b
Joined: 25 Nov 2003
Posts: 65
Location: Sweden
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| Posted: Tue Dec 23, 2003 2:28 pm Post subject: net.eth0 timeout |
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Isn't there someway you can make net.eth0 timeout after 5seconds if the cable is not plugged in?
i used dhcpcd -t 5 before when i had slackware on my laptop. can i just edit net.eth0 to do that? 
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optilude
Apprentice
Joined: 29 May 2002
Posts: 248
Location: England
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| Posted: Tue Dec 23, 2003 3:59 pm Post subject: Re: net.eth0 timeout |
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| twiggy wrote: | Isn't there someway you can make net.eth0 timeout after 5seconds if the cable is not plugged in?
i used dhcpcd -t 5 before when i had slackware on my laptop. can i just edit net.eth0 to do that? |
The /etc/init.d/net.* scripts read the file /etc/conf.d/net. You can set dhcpcd options here by doing something like
Martin
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Documentation, Tips & Tricks
