From 2aa1a265bc3c028711e37639440be3bd4041916c Mon Sep 17 00:00:00 2001
From: Nick Rosbrook <enr0n@ubuntu.com>
Date: Fri, 24 Jan 2025 15:42:38 -0500
Subject: [PATCH] udev: add input/by-{id,path} symlinks for hidraw devices

Take some of the same rule structure from 60-persistent-input.rules, and
apply it to hidraw devices in 60-persistent-hidraw.rules.

Since one of the motivations for this is being able to easily reference
FIDO tokens, add a special case when ID_FIDO_TOKEN==1, and add 'fido'
to the symlink.
---
 rules.d/60-persistent-hidraw.rules | 26 ++++++++++++++++++++++++++
 rules.d/meson.build                |  1 +
 2 files changed, 27 insertions(+)
 create mode 100644 rules.d/60-persistent-hidraw.rules

diff --git a/rules.d/60-persistent-hidraw.rules b/rules.d/60-persistent-hidraw.rules
new file mode 100644
index 00000000000..c22db7d8b85
--- /dev/null
+++ b/rules.d/60-persistent-hidraw.rules
@@ -0,0 +1,26 @@
+# do not edit this file, it will be overwritten on update
+
+ACTION=="remove", GOTO="persistent_hidraw_end"
+SUBSYSTEM!="hidraw", GOTO="persistent_hidraw_end"
+KERNEL!="hidraw*", GOTO="persistent_hidraw_end"
+
+SUBSYSTEMS=="usb", ENV{ID_BUS}=="", IMPORT{builtin}="usb_id"
+SUBSYSTEMS=="usb", IMPORT{builtin}="path_id"
+
+ENV{ID_BUS}=="", GOTO="persistent_hidraw_bus_end"
+
+# by-id links
+ATTRS{bInterfaceNumber}=="|00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-hidraw"
+ATTRS{bInterfaceNumber}=="?*", ATTRS{bInterfaceNumber}!="00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-if$attr{bInterfaceNumber}-hidraw"
+
+# add a more readable 'fido' link for devices with ID_FIDO_TOKEN==1
+ENV{ID_FIDO_TOKEN}=="?*", ATTRS{bInterfaceNumber}=="|00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-fido"
+ENV{ID_FIDO_TOKEN}=="?*", ATTRS{bInterfaceNumber}=="?*", ATTRS{bInterfaceNumber}!="00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-if$attr{bInterfaceNumber}-fido"
+
+LABEL="persistent_hidraw_bus_end"
+
+# by-path
+ENV{ID_PATH}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-hidraw"
+ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="input/by-path/$env{ID_PATH_WITH_USB_REVISION}-hidraw"
+
+LABEL="persistent_hidraw_end"
diff --git a/rules.d/meson.build b/rules.d/meson.build
index 85d314c35cc..4ee964c630a 100644
--- a/rules.d/meson.build
+++ b/rules.d/meson.build
@@ -15,6 +15,7 @@ rules = [
                '60-infiniband.rules',
                '60-input-id.rules',
                '60-persistent-alsa.rules',
+               '60-persistent-hidraw.rules',
                '60-persistent-input.rules',
                '60-persistent-storage-mtd.rules',
                '60-persistent-storage-tape.rules',
-- 
2.47.3