From: Yue Zhang <yuezha@microsoft.com>
To: kys@microsoft.com, haiyangz@microsoft.com,
driverdev-devel@linuxdriverproject.org,
linux-kernel@vger.kernel.org, olaf@aepfle.de,
jasowang@redhat.com, apw@canonical.com,
gregkh@linuxfoundation.org
Cc: decui@microsoft.com, huishao@microsoft.com
Subject: [PATCH v3] Tools: hv: fix file overwriting of hv_fcopy_daemon
Date: Fri, 27 Jun 2014 18:19:48 -0700 [thread overview]
Message-ID: <1403918388-22008-1-git-send-email-yuezha@microsoft.com> (raw)
From: Yue Zhang <yuezha@microsoft.com>
hv_fcopy_daemon fails to overwrite a file if the target file already
exits.
Add O_TRUNC flag on opening.
Signed-off-by: Yue Zhang <yuezha@microsoft.com>
---
tools/hv/hv_fcopy_daemon.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c
index fba1c75..8f96b3e 100644
--- a/tools/hv/hv_fcopy_daemon.c
+++ b/tools/hv/hv_fcopy_daemon.c
@@ -88,7 +88,8 @@ static int hv_start_fcopy(struct hv_start_fcopy *smsg)
}
}
- target_fd = open(target_fname, O_RDWR | O_CREAT | O_CLOEXEC, 0744);
+ target_fd = open(target_fname,
+ O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744);
if (target_fd == -1) {
syslog(LOG_INFO, "Open Failed: %s", strerror(errno));
goto done;
--
1.9.1
reply other threads:[~2014-06-28 0:20 UTC|newest]
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