Process systemd-logind constant 3-7%CPU usage, scanning camera and audio devices

nephros · 13 December 2021 18:51

Oh, it seems upstream knows about all the chown/chmods:

mer-hybris/droid-hal-device/blob/master/helpers/makeudev#L50

    
      
          print "#:$_";                 # after including them
          next if /^\w*#/ or /^\w*$/ ;  # skip comments and blank lines
          
          
# Android .rc files for ueventd /sys are :
          # <devicepath_or_glob>  <attr> <perms>  <owner> <group>
          # This is because uevent only allows a single simple glob within the path
          # Udev handles this by simply concatenating with a /
          # However udev builtins only operate on /dev nodes (AFAICT)
          # Matching is done on events without the /sys/ (which is a userspace
          # convention) but chmod/chown needs the /sys
          # FIXME: consider replacing chmod/chown with an all-in-one to avoid extra exec()s
          if (m{^/sys/}) {
            print "# sys rule\n";
            s{^/sys/}{};
            my ($dev, $key, $mode, $owner, $group) = split;
            print qq{DEVPATH=="/$dev", TEST=="/sys/\$devpath/$key", RUN+="/bin/chmod $mode /sys/\$devpath/$key", RUN+="/bin/chown $owner:$group /sys/\$devpath/$key"\n} ;
            next;
          }
          
          
# Android .rc files for ueventd /dev are :
          # <devicepath_or_glob>  <perms>  <owner> <group>

And this answers my question above, the owner/group/mode thing is not equivalent.