latent chasm
For example I want to make /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode writable, so I can
echo 1 > /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode```
instead of having to
```sh
echo 1 | sudo tee /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode```With sudo I would receive a password prompt, while without sudo it would guarantee it's runnable by other applications running as that user
desert hedge
how about chown root:wheel and chmod 775
hollow karma
For example I want to make `/sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/co...
IIRC, the permission of sysfs is defined in kernel space and can't be changed with userspace tools.
latent chasm
yeah, that's what I thought
but it should be possible if I run chown and chmod each boot?
nvm, operation not permitted
hollow karma
IIRC, the permission of sysfs is defined in kernel space and can't be changed wi...
Perhaps it is now time to regard it as an ancient legend.
desert hedge
maybe you can google "how to chown /sys" and there will be more answers
hollow karma
nvm, operation not permitted
Actually, I just found out that the kernel seems to support chmod() or chown() on these nodes.
latent chasm
huh? But i cant
hollow karma
huh? But i cant
We have similar laptops as my battery also has this interface.
We have similar laptops as my battery also has this interface.
hollow karma
still can't write to it tho
sudo chown $USER:$USER conservation_mode
stat conservation_mode
sudo chmod 664 conservation_mode
Since /sys is not managed by udev, I think you can write a systemd service to change its permissions after boot.
latent chasm
there was no write permission on the second user after : (wheel in my case)
hollow karma
there was no write permission on the second user after `:` (wheel in my case)
It is not a second user, but a group permission
These concepts are related, but they are not the same
latent chasm
is first "user" a specific user? or can it be a group too?
hollow karma
is first "user" a specific user? or can it be a group too?
No
latent chasm
so, it may be a group too, but it's like the owner, right?
hollow karma
so, it may be a group too, but it's like the owner, right?
group owner
ðe permission bits are
rw- |rw- |r--
root|wheel|all other users
chown - change owner
chmod - change file mode bits, inc. permissions
latent chasm
chown group1:group2 file
rw- |rw- |r--
group1|group2|all other users
is that right?
hollow karma
chown group1:group2 file
```
rw- |rw- |r--
group1|group2|all other users
```
Why don't you read the chmod man page and let it tell you?
hollow karma
As mentioned above, the format is user|group|other.