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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH v2] lib: libfile: Do not ignore errors in close()
Date: Fri, 14 Aug 2015 13:31:58 -0700	[thread overview]
Message-ID: <1439584319-4068-1-git-send-email-andrew.smirnov@gmail.com> (raw)

Some character devices may perform meaningful operations in their
implementation of close() -- a good example would be socfpga.c which
checks if the FPGA was programmed succesfully in it's close() method
-- so ignoring return value of this call may cause false positives in
checking exit status for success.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 lib/libfile.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/libfile.c b/lib/libfile.c
index ba03700..a27460c 100644
--- a/lib/libfile.c
+++ b/lib/libfile.c
@@ -262,7 +262,7 @@ int copy_file(const char *src, const char *dst, int verbose)
 	char *rw_buf = NULL;
 	int srcfd = 0, dstfd = 0;
 	int r, w;
-	int ret = 1;
+	int ret = 1, err1 = 0;
 	void *buf;
 	int total = 0;
 	struct stat statbuf;
@@ -326,9 +326,9 @@ out:
 	if (srcfd > 0)
 		close(srcfd);
 	if (dstfd > 0)
-		close(dstfd);
+		err1 = close(dstfd);

-	return ret;
+	return ret ?: err1;
 }
 EXPORT_SYMBOL(copy_file);

--
2.1.4

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             reply	other threads:[~2015-08-14 20:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-14 20:31 Andrey Smirnov [this message]
2015-08-14 20:31 ` [PATCH] i2c-imx: Fix memory leak in i2c_fsl_probe() Andrey Smirnov
2015-08-19 14:24 ` [PATCH v2] lib: libfile: Do not ignore errors in close() Sascha Hauer

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