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-rw-r--r--util/nvmutil/Makefile2
-rw-r--r--util/nvmutil/nvmutil.c11
2 files changed, 11 insertions, 2 deletions
diff --git a/util/nvmutil/Makefile b/util/nvmutil/Makefile
index f9f72370..f25f6dd5 100644
--- a/util/nvmutil/Makefile
+++ b/util/nvmutil/Makefile
@@ -6,7 +6,7 @@ CC=cc
CFLAGS=-Os -Wall -Wextra -Werror -pedantic
PREFIX?=/usr/bin
-nvm:
+nvm: nvmutil.c
$(CC) $(CFLAGS) nvmutil.c -o nvm
install: nvm
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index 0ccfaf32..35abbfae 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -1,5 +1,6 @@
/* SPDX-License-Identifier: MIT */
/* SPDX-FileCopyrightText: 2022, 2023 Leah Rowe <leah@libreboot.org> */
+/* SPDX-FileCopyrightText: 2023 Riku Viitanen <riku.viitanen@protonmail.com> */
#include <sys/stat.h>
@@ -61,8 +62,16 @@ void (*cmd)(void) = NULL;
int
main(int argc, char *argv[])
{
- if (argc < 3)
+ if (argc < 3) {
+ fprintf(stderr, "USAGE:\n");
+ fprintf(stderr, " %s FILE dump\n", argv[0]);
+ fprintf(stderr, " %s FILE setmac [MAC]\n", argv[0]);
+ fprintf(stderr, " %s FILE swap\n", argv[0]);
+ fprintf(stderr, " %s FILE copy 0|1\n", argv[0]);
+ fprintf(stderr, " %s FILE brick 0|1\n", argv[0]);
+ fprintf(stderr, " %s FILE setchecksum 0|1\n", argv[0]);
err(errno = ECANCELED, "Too few arguments");
+ }
flags = (strcmp(COMMAND, "dump") == 0) ? O_RDONLY : flags;
filename = argv[1];
#ifdef __OpenBSD__