[solved] sudo not granting full root privileges?

Barghest · 2010-06-04 17:41:05

Hi,

when I'm trying to set the thresholds for starting and stopping battery charging with Tp_smapi using sudo receive the message that I don't have the permission to do that.

$ sudo echo 85 > /sys/devices/platform/smapi/BAT0/stop_charge_thresh
bash: /sys/devices/platform/smapi/BAT0/stop_charge_thresh: Keine Berechtigung

But when I

$ su -
Passwort: 
# echo 85 > /sys/devices/platform/smapi/BAT0/stop_charge_thresh

everything works fine. I always thougt with sudo you can do everything root can do. So, this isn't the case?

Thanks for enlighten me

Barghest

Last edited by Barghest (2010-06-04 17:48:39)

wonder · 2010-06-04 17:42:38

actually sudo echo 85 > /something are two command

sudo echo 85 is one which is running as root and the redirection one the second

Ramses de Norre · 2010-06-04 17:44:32

echo 85 | sudo tee /sys/devices/platform/smapi/BAT0/stop_charge_thresh

the redirection (the >) is ran by your shell which doesn't run as root.

Stebalien · 2010-06-04 17:45:44

Edit: too slow.

Last edited by Stebalien (2010-06-04 17:46:17)

Barghest · 2010-06-04 17:48:12

wow...this was fast...thanks mates

demian · 2010-06-04 19:06:22

you can circumvent that by using echo 85 | sudo tee /sys/...

falconindy · 2010-06-04 19:30:13

You can also subshell the entire thing with elevated permissions:

su -c 'echo 85 > /blah/blah/blah'

moljac024 · 2010-06-04 19:36:33

and you use "tee -a" to append, instead of >>

Arch Linux

#1 2010-06-04 17:41:05

[solved] sudo not granting full root privileges?

#2 2010-06-04 17:42:38

Re: [solved] sudo not granting full root privileges?

#3 2010-06-04 17:44:32

Re: [solved] sudo not granting full root privileges?

#4 2010-06-04 17:45:44

Re: [solved] sudo not granting full root privileges?

#5 2010-06-04 17:48:12

Re: [solved] sudo not granting full root privileges?

#6 2010-06-04 19:06:22

Re: [solved] sudo not granting full root privileges?

#7 2010-06-04 19:30:13

Re: [solved] sudo not granting full root privileges?

#8 2010-06-04 19:36:33

Re: [solved] sudo not granting full root privileges?

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