From: Martyn Welch <martyn.welch@collabora.com>
Date: Sat, 26 Jan 2019 02:31:51 +0000 (+0000)
Subject: tools: dumpimage: Simplify arguments
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=12b831879a76;p=u-boot.git

tools: dumpimage: Simplify arguments

The dump image utility has very confusing syntax. If called to list image
contents ("-l") it takes the image name as a positional argument. If the
utility is called to extract something from the image, the image must be
provided via the optional argument "-i" as well as the positional argument
but the value passed in the positional argument will be completely
ignored.

Simplify dumpimage by always providing the image as the first positional
argument. Assume we want to dump something from the image if we do not
provide the "-l" option for now.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
---

diff --git a/tools/dumpimage.c b/tools/dumpimage.c
index 2847e6c0b4..1b92dec364 100644
--- a/tools/dumpimage.c
+++ b/tools/dumpimage.c
@@ -65,17 +65,14 @@ int main(int argc, char **argv)
 
 	params.cmdname = *argv;
 
-	while ((opt = getopt(argc, argv, "li:o:T:p:V")) != -1) {
+	while ((opt = getopt(argc, argv, "lo:T:p:V")) != -1) {
 		switch (opt) {
 		case 'l':
 			params.lflag = 1;
 			break;
-		case 'i':
-			params.imagefile = optarg;
-			params.iflag = 1;
-			break;
 		case 'o':
 			params.outfile = optarg;
+			params.iflag = 1;
 			break;
 		case 'T':
 			params.type = genimg_get_type_id(optarg);
@@ -108,6 +105,8 @@ int main(int argc, char **argv)
 		usage();
 	}
 
+	params.imagefile = argv[optind];
+
 	/* set tparams as per input type_id */
 	tparams = imagetool_get_type(params.type);
 	if (tparams == NULL) {
@@ -128,12 +127,11 @@ int main(int argc, char **argv)
 		}
 	}
 
-	if (params.iflag)
-		params.datafile = argv[optind];
-	else
-		params.imagefile = argv[optind];
-	if (!params.outfile)
-		params.outfile = params.datafile;
+	if (!params.lflag && !params.outfile) {
+		fprintf(stderr, "%s: No output file provided\n",
+			params.cmdname);
+		exit(EXIT_FAILURE);
+	}
 
 	ifd = open(params.imagefile, O_RDONLY|O_BINARY);
 	if (ifd < 0) {
@@ -204,10 +202,9 @@ static void usage(void)
 		"          -l ==> list image header information\n",
 		params.cmdname);
 	fprintf(stderr,
-		"       %s -i image -T type [-p position] [-o outfile] data_file\n"
-		"          -i ==> extract from the 'image' a specific 'data_file'\n"
+		"       %s -T type [-p position] [-o outfile] image\n"
 		"          -T ==> set image type to 'type'\n"
-		"          -p ==> 'position' (starting at 0) of the 'data_file' inside the 'image'\n",
+		"          -p ==> 'position' (starting at 0) of the component to extract from image\n",
 		params.cmdname);
 	fprintf(stderr,
 		"       %s -V ==> print version information and exit\n",