/usr/lib/pd/extra/rtc/inv.pd is in pd-rtclib 4.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #N canvas 63 44 194 215 10;
#X obj 48 66 inlet;
#X obj 48 100 expr 1/$f1;
#X obj 48 135 outlet;
#X connect 0 0 1 0;
#X connect 1 0 2 0;
|