linux-kernel - [PATCH 09/10] scripts/basic/fixdep: Complete error handling in print

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Date:   Fri, 28 Oct 2016 10:40:30 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 09/10] scripts/basic/fixdep: Complete error handling in
 print_cmdline()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 28 Oct 2016 09:29:59 +0200

A return value was not checked from a call of the function "printf".

This issue was detected also by using the Coccinelle software.


Add a bit of exception handling there.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 scripts/basic/fixdep.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index f5ff6eea..911347a 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -132,7 +132,12 @@ static void usage(void)
  */
 static void print_cmdline(void)
 {
-	printf("cmd_%s := %s\n\n", target, cmdline);
+	if (printf("cmd_%s := %s\n\n", target, cmdline) < 10) {
+		int code = errno;
+
+		perror("fixdep: print_cmdline");
+		exit(code);
+	}
 }
 
 /*
-- 
2.10.1