[PATCH u-boot-marvell 08/14] tools: kwboot: Allow to use option -b without image path

["Marek Behún" <kabel@kernel.org>]

From: Pali Rohár <pali@kernel.org>

Allow option -b without image path parameter, to send boot pattern and
wait for response but not send any image. This allows to use kwboot just
for processing boot pattern and user can use any other xmodem tool for
transferring the image itself (e.g. sx). Useful for debugging purposes.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
---
 tools/kwboot.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 1dcec1969a..c413a8bf51 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -1699,6 +1699,8 @@ main(int argc, char **argv)
 	size_t size;
 	size_t after_img_rsv;
 	int baudrate;
+	int prev_optind;
+	int c;
 
 	rv = 1;
 	tty = -1;
@@ -1716,22 +1718,32 @@ main(int argc, char **argv)
 	kwboot_verbose = isatty(STDOUT_FILENO);
 
 	do {
-		int c = getopt(argc, argv, "hb:ptaB:dD:q:s:o:");
+		prev_optind = optind;
+		c = getopt(argc, argv, "hbptaB:dD:q:s:o:");
 		if (c < 0)
 			break;
 
 		switch (c) {
 		case 'b':
+			if (imgpath || bootmsg || debugmsg)
+				goto usage;
 			bootmsg = kwboot_msg_boot;
-			imgpath = optarg;
+			if (prev_optind == optind)
+				goto usage;
+			if (argv[optind] && argv[optind][0] != '-')
+				imgpath = argv[optind++];
 			break;
 
 		case 'D':
+			if (imgpath || bootmsg || debugmsg)
+				goto usage;
 			bootmsg = NULL;
 			imgpath = optarg;
 			break;
 
 		case 'd':
+			if (imgpath || bootmsg || debugmsg)
+				goto usage;
 			debugmsg = kwboot_msg_debug;
 			break;
 
@@ -1774,11 +1786,11 @@ main(int argc, char **argv)
 	if (!bootmsg && !term && !debugmsg)
 		goto usage;
 
-	if (argc - optind < 1)
-		goto usage;
-
 	ttypath = argv[optind++];
 
+	if (optind != argc)
+		goto usage;
+
 	tty = kwboot_open_tty(ttypath, imgpath ? 115200 : baudrate);
 	if (tty < 0) {
 		perror(ttypath);
-- 
2.34.1