.gitignore

@@ -1,2 +1,4 @@
 bin
 .vscode
+sudo.pkg
+sudo.pkg.gz

Makefile

@@ -12,9 +12,17 @@ build:
 		mkdir bin; \
 	fi
 	$(CC) -o $(TARGET) $(SOURCES) $(CFLAGS)
-	sudo chown -v root:staff $(TARGET)
+	chown -v 0:0 $(TARGET)
-	sudo chmod 4755 $(TARGET)
+	chmod 4755 $(TARGET)
 
 clean:
 	rm -v $(TARGET)
 
+package:
+	mkdir -pv sudo.pkg/usr/bin
+	cp -v $(TARGET) sudo.pkg/usr/bin/sudo
+	echo "/usr/bin/sudo" > sudo.pkg/list
+	printf "#!/bin/sh\nchown -v 0:0 /usr/bin/sudo\nchmod 4755 /usr/bin/sudo" > sudo.pkg/post_install
+	chmod +x sudo.pkg/post_install
+	tar -czvf sudo.pkg.gz sudo.pkg
+	

src/sudo.c

@@ -2,8 +2,11 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-// #include <sys/types.h>
+#include <sys/types.h>
 #include <unistd.h>
+#ifdef __linux__
+#include <grp.h>
+#endif
 
 void die(char *argv0, char *obj, char *msg) {
     if (msg == NULL) msg = strerror(errno);