[U-Boot] [PATCH 4/9] mkenvimage: More error handling

[David Wagner <david.wagner@free-electrons.com>]

Verbosly fail if the target environment size or the padding byte are badly
formated.

Verbosly fail if something bad happens when reading from standard input.

Signed-off-by: David Wagner <david.wagner@free-electrons.com>
---
 tools/mkenvimage.c |   32 ++++++++++++++++++++++++++++++--
 1 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/tools/mkenvimage.c b/tools/mkenvimage.c
index 6af0d56..b6e7f14 100644
--- a/tools/mkenvimage.c
+++ b/tools/mkenvimage.c
@@ -82,7 +82,17 @@ int main(int argc, char **argv)
 		switch (option) {
 		case 's':
 			datasize = strtol(optarg, NULL, 0);
-			break;
+			if (!errno)
+				break;
+
+			if (errno == ERANGE)
+				fprintf(stderr, "Bad integer format: %s\n",
+						optarg);
+			else
+				fprintf(stderr, "Error while parsing %s: %s\n",
+						optarg, strerror(errno));
+
+			return EXIT_FAILURE;
 		case 'o':
 			bin_filename = strdup(optarg);
 			if (!bin_filename) {
@@ -98,7 +108,17 @@ int main(int argc, char **argv)
 			break;
 		case 'p':
 			padbyte = strtol(optarg, NULL, 0);
-			break;
+			if (!errno)
+				break;
+
+			if (errno == ERANGE)
+				fprintf(stderr, "Bad integer format: %s\n",
+						optarg);
+			else
+				fprintf(stderr, "Error while parsing %s: %s\n",
+						optarg, strerror(errno));
+
+			return EXIT_FAILURE;
 		case 'h':
 			usage(argv[0]);
 			return EXIT_SUCCESS;
@@ -147,7 +167,15 @@ int main(int argc, char **argv)
 
 		do {
 			filebuf = realloc(filebuf, readlen);
+			if (!filebuf) {
+				fprintf(stderr, "Can't realloc memory for the input file buffer\n");
+				return EXIT_FAILURE;
+			}
 			readbytes = read(txt_fd, filebuf + filesize, readlen);
+			if (errno) {
+				fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
+				return EXIT_FAILURE;
+			}
 			filesize += readbytes;
 		} while (readbytes == readlen);
 
-- 
1.7.7.3