kernel-panic69
DD-WRT Guru
Joined: 08 May 2018
Posts: 14249
Location: Texas, USA
|
 Posted: Mon Oct 23, 2023 13:43 Post subject: |
 |
| ArjenR49 wrote: | Upgraded my R7800 from build 53714 to 53734 half an hour ago using easyddup.
Had to resort to the Linux Magic System to reboot:
echo b > /proc/sysrq-trigger
Rebooted using the GUI a few times after that. The Magic reboot had left one of the thumbdrive partitions 'dirty' judging from result of the e2fsck check in my shutdown command script (rsyslog).
If this is going to be the new routine, it should be helpful to precede the boot trick with:
echo s > /proc/sysrq-trigger
echo u > /proc/sysrq-trigger
for sync and unmount ... |
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mwchang
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Joined: 26 Mar 2013
Posts: 1858
Location: Hung Hom, Hong Kong
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| Posted: Tue Nov 07, 2023 8:47 Post subject: |
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For the record:
Beware that the reboot command is not exactly a command, but a function in Ash shell script /etc/profile. To access the TRUE reboot command directly, specify the full path "/sbin/reboot"! But then there will be no shutdown script execution.
| Code: | # cat /etc/profile
export PATH=/bin:/usr/bin:/sbin:/usr/sbin ....
....
reboot() {
for f in /opt/etc/init.d/K* ; do
[ -x "$f" ] && "$f" stop
done
echo "#!/bin/sh" > /tmp/.rc_shutdown
echo "$(nvram get rc_shutdown)" >> /tmp/.rc_shutdown
if [ -f /tmp/.rc_shutdown ]; then
chmod +x /tmp/.rc_shutdown
/tmp/.rc_shutdown
fi
/sbin/reboot
}
|
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Alozaros
DD-WRT Guru
Joined: 16 Nov 2015
Posts: 6447
Location: UK, London, just across the river..
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| Posted: Wed Nov 08, 2023 7:32 Post subject: |
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have you tried it, when reboot command is stalling ?
as not all shell commands are working...
i also tried to give it a path and some other tricks, but at last the magic number was the shortest cut...  (at least it worked) as my R7800 is in the locked room and me miles away of it...and lots of clients rely on it to be operational...
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mwchang
DD-WRT Guru
Joined: 26 Mar 2013
Posts: 1858
Location: Hung Hom, Hong Kong
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| Posted: Wed Nov 08, 2023 13:03 Post subject: |
|
| Alozaros wrote: | have you tried it, when reboot command is stalling ?
as not all shell commands are working...
i also tried to give it a path and some other tricks, but at last the magic number was the shortest cut... |
Maybe the better question is:
Why isn't /sbin/reboot using the magic key to reboot, also after running the shutdown script? Better, run sync (also magic key) as well to flush all disk caches.
I suspect /sbin/reboot is not DD-WRT's own work. The answer is of course in the source codes. Well... if you got time... 
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