From: Mike Frysinger <vapier@gentoo.org>
Date: Mon, 19 Oct 2009 00:43:14 +0000 (-0400)
Subject: envcrc: check return value of fwrite()
X-Git-Tag: v2009.11-rc1~17
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=f67066b6b0740b826ed862615c5ab022aaf4779a;p=oweals%2Fu-boot.git

envcrc: check return value of fwrite()

Newer toolchains will often complain about unchecked fwrite():
	envcrc.c:117: warning: ignoring return value of `fwrite´, declared
		with attribute warn_unused_result

So check the return value to silence the warnings.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/tools/envcrc.c b/tools/envcrc.c
index d02a7dbcdc..d1e84b3b63 100644
--- a/tools/envcrc.c
+++ b/tools/envcrc.c
@@ -21,6 +21,7 @@
  * MA 02111-1307 USA
  */
 
+#include <errno.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -114,7 +115,8 @@ int main (int argc, char **argv)
 			}
 			for (i = start; i != end; i += step)
 				printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
-			fwrite(dataptr, 1, datasize, stdout);
+			if (fwrite(dataptr, 1, datasize, stdout) != datasize)
+				fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
 		} else {
 			printf("CRC32 from offset %08X to %08X of environment = %08X\n",
 				(unsigned int) (dataptr - envptr),