diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..50c72fb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/internals-*.db
diff --git a/Makefile b/Makefile
index 08e9342..ef9915f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,36 @@
 MY_INTERNALS = $(HOME)/Library/Mobile\ Documents/com~apple~TextEdit/Documents/Apple\ Internals.rtf
+DB = internals-$(shell sw_vers -productVersion).db
+DB_TARGETS = db_files
 
-.PHONY: all
+.PHONY: all $(DB_TARGETS)
 
-all: internals.txt
+all: internals.txt $(DB)
 
 ifneq ($(wildcard $(MY_INTERNALS)),)
 internals.txt: $(MY_INTERNALS)
 	textutil -cat txt "$<" -output $@
 endif
+
+$(DB):
+	@$(MAKE) --silent --jobs=1 $(DB_TARGETS) | sqlite3 -bail $@
+
+db_files:
+	if ! csrutil status | grep -Fq disabled ; then \
+		printf '\033[1mdisable SIP to get complete file information\033[m\n' >&2 ; \
+		echo 'FAIL;' ; \
+		exit 1 ; \
+	fi
+	printf '\033[1mcollecting file information...\033[m\n' >&2
+	echo 'DROP TABLE IF EXISTS files;'
+	echo 'CREATE TABLE files (id INTEGER PRIMARY KEY, os TEXT, path TEXT, executable BOOLEAN);'
+	sudo find /Library /System /bin /dev /private /sbin /usr ! \( -path /System/Volumes/Data -prune \) 2> /dev/null | \
+		sed "s/'/''/g;s/.*/INSERT INTO files (os, path) VALUES('macOS', '&');/"
+	find $(HOME)/Library | \
+		sed "s|^$(HOME)|~|;s/'/''/g;s/.*/INSERT INTO files (os, path) VALUES('macOS', '&');/"
+	cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot ; find . | \
+		sed "1d;s/\\.//;s/'/''/g;s/.*/INSERT INTO files (os, path) VALUES('iOS', '&');/"
+	cd /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/tvOS.simruntime/Contents/Resources/RuntimeRoot ; find . | \
+		sed "1d;s/\\.//;s/'/''/g;s/.*/INSERT INTO files (os, path) VALUES('tvOS', '&');/"
+	cd /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot ; find . | \
+		sed "1d;s/\\.//;s/'/''/g;s/.*/INSERT INTO files (os, path) VALUES('watchOS', '&');/"
+	echo 'CREATE INDEX files_path ON files (path);'