From 58a19b9d56e5002367794ef0d2e9cf8dcd8d0be5 Mon Sep 17 00:00:00 2001
From: Paul Elder <paul.elder@ideasonboard.com>
Date: Fri, 6 Dec 2019 04:09:32 -0500
Subject: libcamera: v4l2_device, v4l2_videodevice: call open system call
 directly

We are preparing to integrate the V4L2 adaptation layer, which will
intercept open() calls (among others) via LD_PRELOAD. To prevent
libcamera's own open() calls from being intercepted, replace them with a
direct syscall.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/libcamera/v4l2_device.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/libcamera/v4l2_device.cpp')

diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
index 0452f801..c13eddc8 100644
--- a/src/libcamera/v4l2_device.cpp
+++ b/src/libcamera/v4l2_device.cpp
@@ -11,6 +11,7 @@
 #include <iomanip>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 #include "log.h"
@@ -75,7 +76,7 @@ int V4L2Device::open(unsigned int flags)
 		return -EBUSY;
 	}
 
-	int ret = ::open(deviceNode_.c_str(), flags);
+	int ret = syscall(SYS_openat, AT_FDCWD, deviceNode_.c_str(), flags);
 	if (ret < 0) {
 		ret = -errno;
 		LOG(V4L2, Error) << "Failed to open V4L2 device: "
-- 
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