[U-Boot] [PATCH 9/9] mkenvimage: Default to stdout if the output argument is absent or "-"

[David Wagner]

Signed-off-by: David Wagner <david.wagner at free-electrons.com>
---
 tools/mkenvimage.c |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/tools/mkenvimage.c b/tools/mkenvimage.c
index fa6eb6e..8ba63d2 100644
--- a/tools/mkenvimage.c
+++ b/tools/mkenvimage.c
@@ -261,11 +261,15 @@ int main(int argc, char **argv)
 	if (redundant)
 		*(dataptr + sizeof(targetendian_crc)) = 1;
 
-	bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
-	if (bin_fd == -1) {
-		fprintf(stderr, "Can't open output file \"%s\": %s\n",
-				bin_filename, strerror(errno));
-		return EXIT_FAILURE;
+	if (!bin_filename || strcmp(bin_filename, "-") == 0) {
+		bin_fd = STDOUT_FILENO;
+	} else {
+		bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+		if (bin_fd == -1) {
+			fprintf(stderr, "Can't open output file \"%s\": %s\n",
+					bin_filename, strerror(errno));
+			return EXIT_FAILURE;
+		}
 	}
 
 	if (write(bin_fd, dataptr, sizeof(*dataptr) * datasize) !=
-- 
1.7.7.3