From 4f12d0a4da72d58f99daa6d4cc9c509fce189caf Mon Sep 17 00:00:00 2001
From: Ella Stanforth <ella@iglunix.org>
Date: Thu, 11 Jul 2024 18:48:52 +0000
Subject: [PATCH] contrib: add example rules script

---
 Makefile                             |  4 +++-
 contrib/libudev-zero-rules-helper.sh | 15 +++++++++++++++
 udev_device.c                        |  2 +-
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100755 contrib/libudev-zero-rules-helper.sh

diff --git a/Makefile b/Makefile
index 1fc5a1f4..dc201798 100644
--- a/Makefile
+++ b/Makefile
@@ -3,11 +3,13 @@
 
 PREFIX = /usr/local
 LIBDIR = ${PREFIX}/lib
+LIBEXECDIR = ${PREFIX}/libexec
 INCLUDEDIR = ${PREFIX}/include
 PKGCONFIGDIR = ${LIBDIR}/pkgconfig
 XCFLAGS = ${CPPFLAGS} ${CFLAGS} -std=c99 -fPIC -D_XOPEN_SOURCE=700 \
 		  -Wall -Wextra -Wpedantic -Wmissing-prototypes -Wstrict-prototypes \
-		  -Wno-unused-parameter
+		  -Wno-unused-parameter \
+		  -DRULES_HELPER_PATH=\"${LIBEXECDIR}/libudev-zero-rules-helper\"
 XLDFLAGS = ${LDFLAGS} -shared -Wl,-soname,libudev.so.1
 XARFLAGS = -rc
 AR = ar
diff --git a/contrib/libudev-zero-rules-helper.sh b/contrib/libudev-zero-rules-helper.sh
new file mode 100755
index 00000000..2e14a00a
--- /dev/null
+++ b/contrib/libudev-zero-rules-helper.sh
@@ -0,0 +1,15 @@
+#!/bin/sh -e
+
+if [ "$SUBSYSTEM" = "sound" ]
+then
+    if printf '%s' "$SYSNAME" | grep '^card' > /dev/null
+    then
+        printf 'SOUND_INITIALIZED=1\n'
+    fi
+
+    if printf '%s' "$SYSNAME" | grep '^pcmC.*D2c$' > /dev/null \
+        && grep '^AppleJ' "$SYSPATH/device/id" 2>/dev/null
+    then
+        printf 'ACP_IGNORE=1\n'
+    fi
+fi
diff --git a/udev_device.c b/udev_device.c
index a9571261..9cf12255 100644
--- a/udev_device.c
+++ b/udev_device.c
@@ -55,7 +55,7 @@
 #endif
 
 #ifndef RULES_HELPER_PATH
-#define RULES_HELPER_PATH "/sbin/libudev-zero-rules-helper"
+#error "RULES_HELPER_PATH not specified"
 #endif
 
 #ifndef UEVENT_NUM_ENVP