From f67066b6b0740b826ed862615c5ab022aaf4779a Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sun, 18 Oct 2009 20:43:14 -0400
Subject: [PATCH] envcrc: check return value of fwrite()
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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>
---
tools/envcrc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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),
--
2.39.5