Re: [PATCH 001/001] CHAR DRIVERS: a simple device to give daemonsa /sys-like interface

From: Bob Smith
Date: Sat Aug 10 2013 - 18:07:26 EST

Arnd Bergmann wrote:
The goal of this patch was to make it possible to configure
daemons using simple file IO. The litmus test for this is
that commands like these should be possible
cat < /var/daemons/wpa_supplicant/use_channel
echo 5 >/var/daemons/wpa_supplicant/use_channel

If you want to have that behavior, I think the best way to
do it would be new file system that combines aspects of
tmpfs and debugfs, letting users with write access to the
mount point (or a directory under it) create subdirectories
and files using regular unix permission handling. You would
then always use the file_operations that you defined for your
chardev but use that with inode_operations similar to tmpfs.

THANKS! It would still be a kernel patch and still require
root to set up but so would FUSE and your approach might be
much lighter weight.

Bob Smith

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