Better error resistance (don't fail if user already exists)

install.lua

@@ -75,9 +75,23 @@ if baad then
 	return
 end
 
-if not os.execute"adduser --shell /bin/sh --disabled-password ikibooru" then
-	print"Failed to create user ikibooru."
-	return
+if select(3, os.execute"id ikibooru") == 0 then
+	while true do
+		io.stdout:write"User ikibooru already exists. Can use? (y/n): "
+		local o = io.read"*l":lower()
+		if o == "y" then
+			break
+		elseif o == "n" then
+			print"Exiting."
+			return
+		end
+		print"Try again."
+	end
+else
+	if not os.execute"useradd -U -m -s /bin/sh ikibooru" then
+		print"Failed to create user ikibooru."
+		return
+	end
 end
 
 io.stdout:write"MySQL host: "
@@ -301,4 +315,4 @@ end
 
 print""
 
-print"Installation complete. Remember: Ikibooru is only an HTTP server. It must be used together with a relay or reverse proxy."
+print"Installation complete. Reminder: Ikibooru is only an HTTP server. It must be used together with a relay or reverse proxy."