1 files changed, 102 insertions, 0 deletions
diff --git a/freebsd/sbin/nvmecontrol/comnd.h b/freebsd/sbin/nvmecontrol/comnd.h
new file mode 100644
index 00000000..91c97d4a
--- /dev/null
+++ b/freebsd/sbin/nvmecontrol/comnd.h
@@ -0,0 +1,102 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019 Netflix, Inc
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	COMND_H
+#define	COMND_H
+
+#include <sys/queue.h>
+#include <sys/linker_set.h>
+
+/*
+ * Regularized parsing of simple arguments built on top of getopt_long.
+ */
+
+typedef enum arg_type {
+	arg_none = 0,
+	arg_uint8,
+	arg_uint16,
+	arg_uint32,
+	arg_uint64,
+	arg_size,
+	arg_string,
+	arg_path,
+} arg_type;
+
+// XXX need to change to offsetof for opts and args.
+// we then need to allocate ctx and pass that into the cmd
+// stuff. this will be a little tricky and we may need to expand
+// arg_type stuff.
+
+struct opts {
+	const char	*long_arg;
+	int		short_arg;
+	arg_type	at;
+	void 		*ptr;			//  XXXX change to offset of
+	const char	*descr;
+};
+
+// XXX TDB: subcommand vs actual argument. maybe with subcmd?
+// XXX TBD: do we need parsing callback functions?
+struct args {
+	arg_type	at;
+	void 		*ptr;			//  XXXX change to offset of
+	const char	*descr;
+};
+
+typedef void (cmd_load_cb_t)(void *, void *);
+struct cmd;
+typedef void (cmd_fn_t)(const struct cmd *nf, int argc, char *argv[]);
+
+struct cmd  {
+	SLIST_ENTRY(cmd)	link;
+	const char		*name;
+	cmd_fn_t		*fn;
+	size_t			ctx_size;
+	const struct opts	*opts;
+	const struct args	*args;
+	const char		*descr;
+	SLIST_HEAD(,cmd)	subcmd;
+	struct cmd		*parent;
+};
+
+void cmd_register(struct cmd *, struct cmd *);
+#define CMD_COMMAND(c)							\
+    static void cmd_register_##c(void) __attribute__((constructor));	\
+    static void cmd_register_##c(void) { cmd_register(NULL, &c); }
+#define CMD_SUBCOMMAND(c,sc)						\
+    static void cmd_register_##c_##sc(void) __attribute__((constructor)); \
+    static void cmd_register_##c_##sc(void) { cmd_register(&c, &sc); }
+
+int arg_parse(int argc, char * const *argv, const struct cmd *f);
+void arg_help(int argc, char * const *argv, const struct cmd *f);
+void cmd_init(void);
+void cmd_load_dir(const char *dir, cmd_load_cb_t *cb, void *argp);
+int cmd_dispatch(int argc, char *argv[], const struct cmd *);
+
+#endif /* COMND_H */