swaylock: add i3lock compatible options

swaylock/main.c

@@ -92,28 +92,46 @@ void notify_key(enum wl_keyboard_key_state state, xkb_keysym_t sym, uint32_t cod
 }
 
 int main(int argc, char **argv) {
+	char *image_path = NULL;
+	char *scaling_mode_str = "fit";
+
 	init_log(L_INFO);
 
 	static struct option long_options[] = {
 		{"help", no_argument, NULL, 'h'},
+		{"image", required_argument, NULL, 'i'},
+		{"scaling", required_argument, NULL, 's'},
+		{"tiling", no_argument, NULL, 't'},
 		{"version", no_argument, NULL, 'v'},
 		{0, 0, 0, 0}
 	};
 
 	const char *usage =
-		"Usage: swaylock <image> [stretch|fit|fill|center|tile]\n"
+		"Usage: swaylock [options...]\n"
 		"\n"
 		"  -h, --help             Show help message and quit.\n"
-		"  -v, --version          Show the version number and quit.\n";
+		"  -s, --scaling          Scaling mode: stretch, fill, fit, center, tile.\n"
+		"  -t, --tiling           Same as --scaling=tile.\n"
+		"  -v, --version          Show the version number and quit.\n"
+		"  -i, --image <path>     Display the given image.\n";
 
 	int c;
 	while (1) {
 		int option_index = 0;
-		c = getopt_long(argc, argv, "hv", long_options, &option_index);
+		c = getopt_long(argc, argv, "hi:s:tv", long_options, &option_index);
 		if (c == -1) {
 			break;
 		}
 		switch (c) {
+		case 'i':
+			image_path = optarg;
+			break;
+		case 's':
+			scaling_mode_str = optarg;
+			break;
+		case 't':
+			scaling_mode_str = "tile";
+			break;
 		case 'v':
 #if defined SWAY_GIT_VERSION && defined SWAY_GIT_BRANCH && defined SWAY_VERSION_DATE
 			fprintf(stdout, "swaylock version %s (%s, branch \"%s\")\n", SWAY_GIT_VERSION, SWAY_VERSION_DATE, SWAY_GIT_BRANCH);
@@ -128,8 +146,11 @@ int main(int argc, char **argv) {
 		}
 	}
 
-	char *image_path = argv[optind];
+	// TODO: support locking without image
-	char *scaling_mode_str = argv[optind+1];
+	if (!image_path) {
+			fprintf(stderr, "No image specified!\n");
+			exit(EXIT_FAILURE);
+	}
 
 	password = malloc(1024); // TODO: Let this grow
 	password[0] = '\0';
@@ -154,7 +175,7 @@ int main(int argc, char **argv) {
 
 #ifdef WITH_GDK_PIXBUF
 	GError *err = NULL;
-	GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(image_path, &err); // TODO: Parse i3lock arguments
+	GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(image_path, &err);
 	if (!pixbuf) {
 		sway_abort("Failed to load background image.");
 	}