diff --git a/cli.c b/cli.c
new file mode 100644
index 0000000..82723fd
--- /dev/null
+++ b/cli.c
@@ -0,0 +1,100 @@
+/*
+ * This file is part of the flashprog project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "flash.h"
+#include "cli.h"
+
+static const char *const command_prefix = "flashprog-";
+
+static const struct {
+	const char *name;
+	int (*main)(int argc, char *argv[]);
+} commands[] = {
+	{ "mem",		flashprog_classic_main },
+	{ "memory",		flashprog_classic_main },
+};
+
+static void usage(const char *const name)
+{
+	fprintf(stderr, "\nUsage: %s [<command>] [<argument>...]\n", name);
+	fprintf(stderr, "\nWhere <command> can be\n\n"
+			" mem[ory]                 Standard memory operations\n"
+			"                          (read/erase/write/verify)\n"
+			"\n"
+			"The default is 'memory'. See `%s <command> --help`\n"
+			"for further instructions.\n\n", name);
+	exit(1);
+}
+
+static int combine_argv01(char *argv[])
+{
+	const size_t len = strlen(argv[0]) + 1 + strlen(argv[1]) + 1;
+	char *const argv0 = malloc(len);
+	if (!argv0) {
+		fprintf(stderr, "Out of memory!\n");
+		return 1;
+	}
+	snprintf(argv0, len, "%s %s", argv[0], argv[1]);
+	argv[1] = argv0;
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	const char *cmd;
+	size_t i;
+
+	print_version();
+	print_banner();
+
+	if (argc < 1)
+		usage("flashprog");
+
+	/* Turn something like `./flashprog-cmd` into `flashprog-cmd`: */
+	const char *const slash = strrchr(argv[0], '/');
+	if (slash)
+		cmd = slash + 1;
+	else
+		cmd = argv[0];
+
+	/* Turn `flashprog-cmd` into `cmd`: */
+	if (!strncmp(cmd, command_prefix, strlen(command_prefix)))
+		cmd += strlen(command_prefix);
+
+	/* Run `cmd` if found: */
+	for (i = 0; i < ARRAY_SIZE(commands); ++i) {
+		if (!strcmp(cmd, commands[i].name))
+			return commands[i].main(argc, argv);
+	}
+
+	if (argc < 2)
+		usage(argv[0]);
+
+	/* Try to find command as first argument in argv[1]: */
+	for (i = 0; i < ARRAY_SIZE(commands); ++i) {
+		if (!strcmp(argv[1], commands[i].name)) {
+			/* Squash argv[0] into argv[1]: */
+			if (combine_argv01(argv))
+				return 1;
+			return commands[i].main(argc - 1, argv + 1);
+		}
+	}
+
+	/* We're still here? Fall back to classic cli: */
+	return flashprog_classic_main(argc, argv);
+}