[PATCH v2 7/8] nandwrite: add check for negative blockalign

[Brian Norris]

Includes error messages for negative blockalign, telling the user what
the offending option and value were.

Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 nandwrite.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/nandwrite.c b/nandwrite.c
index 5373a89..2e45136 100644
--- a/nandwrite.c
+++ b/nandwrite.c
@@ -218,6 +218,10 @@ static void process_options(int argc, char * const argv[])
 		exit(EXIT_FAILURE);
 	}
 
+	if (blockalign < 0)
+		errmsg_die("Can't specify negative blockalign with option -b:"
+				" %d", blockalign);
+
 	argc -= optind;
 	argv += optind;
 
-- 
1.7.0.4