[source] otrx: add support for -A (append) and -a (align) options

[LEDE Commits]

rmilecki pushed a commit to source.git, branch master:
https://git.lede-project.org/3f96e57aed69fcd88a8d4f06bbf97688f67ca343

commit 3f96e57aed69fcd88a8d4f06bbf97688f67ca343
Author: Rafał Miłecki <rafal at milecki.pl>
AuthorDate: Mon Nov 13 23:07:47 2017 +0100

    otrx: add support for -A (append) and -a (align) options
    
    They are inspired and compatible with the original and mjn3's trx tool.
    
    Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
---
 package/utils/otrx/src/otrx.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/package/utils/otrx/src/otrx.c b/package/utils/otrx/src/otrx.c
index d08507f..7e117c6 100644
--- a/package/utils/otrx/src/otrx.c
+++ b/package/utils/otrx/src/otrx.c
@@ -346,7 +346,7 @@ static int otrx_create(int argc, char **argv) {
 	fseek(trx, curr_offset, SEEK_SET);
 
 	optind = 3;
-	while ((c = getopt(argc, argv, "f:b:")) != -1) {
+	while ((c = getopt(argc, argv, "f:A:a:b:")) != -1) {
 		switch (c) {
 		case 'f':
 			if (curr_idx >= TRX_MAX_PARTS) {
@@ -370,6 +370,27 @@ static int otrx_create(int argc, char **argv) {
 				curr_offset += sbytes;
 
 			break;
+		case 'A':
+			sbytes = otrx_create_append_file(trx, optarg);
+			if (sbytes < 0) {
+				fprintf(stderr, "Failed to append file %s\n", optarg);
+			} else {
+				curr_offset += sbytes;
+			}
+
+			sbytes = otrx_create_align(trx, curr_offset, 4);
+			if (sbytes < 0)
+				fprintf(stderr, "Failed to append zeros\n");
+			else
+				curr_offset += sbytes;
+			break;
+		case 'a':
+			sbytes = otrx_create_align(trx, curr_offset, strtol(optarg, NULL, 0));
+			if (sbytes < 0)
+				fprintf(stderr, "Failed to append zeros\n");
+			else
+				curr_offset += sbytes;
+			break;
 		case 'b':
 			sbytes = strtol(optarg, NULL, 0) - curr_offset;
 			if (sbytes < 0) {
@@ -541,6 +562,8 @@ static void usage() {
 	printf("Creating new TRX file:\n");
 	printf("\totrx create <file> [options] [partitions]\n");
 	printf("\t-f file\t\t\t\t[partition] start new partition with content copied from file\n");
+	printf("\t-A file\t\t\t\t[partition] append current partition with content copied from file\n");
+	printf("\t-a alignment\t\t\t[partition] align current partition\n");
 	printf("\t-b offset\t\t\t[partition] append zeros to partition till reaching absolute offset\n");
 	printf("\n");
 	printf("Extracting from TRX file:\n");