From: Mike Frysinger <vapier@gentoo.org>
Date: Wed, 9 Dec 2009 11:55:19 +0000 (-0500)
Subject: gen_init_cpio: fixed fwrite warning
X-Git-Tag: firefly_0821_release~9833^2~3617^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6d87fea4dd7152df4a4605a3846c3bf10f869e0c;p=firefly-linux-kernel-4.4.55.git

gen_init_cpio: fixed fwrite warning

On compilers with security warnings enabled by default, we get:

usr/gen_init_cpio.c: In function ‘cpio_mkfile’:
usr/gen_init_cpio.c:357: warning: ignoring return value of ‘fwrite’,
                                  declared with attribute warn_unused_result

So check the return value and handle errors accordingly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
---

diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index 83b3dde1a83b..b2b3c2d1cf8b 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -354,7 +354,10 @@ static int cpio_mkfile(const char *name, const char *location,
 		push_pad();
 
 		if (size) {
-			fwrite(filebuf, size, 1, stdout);
+			if (fwrite(filebuf, size, 1, stdout) != 1) {
+				fprintf(stderr, "writing filebuf failed\n");
+				goto error;
+			}
 			offset += size;
 			push_pad();
 		}