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v4l2: v4l2_camera_file: Store file description

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Create a string that describe the file from the path and file
descriptor. This will be used in log messages to clearly identify which
file an operation is related to.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2021-12-28 23:29:51 +02:00
parent 43c86fb0c6
commit 07d5fff29c
3 changed files with 37 additions and 3 deletions
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28
src/v4l2/v4l2_camera_file.cpp
View file

@ -7,20 +7,46 @@
#include "v4l2_camera_file.h"
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/videodev2.h>
#include "v4l2_camera_proxy.h"
using namespace libcamera;
V4L2CameraFile::V4L2CameraFile(int efd, bool nonBlocking, V4L2CameraProxy *proxy)
V4L2CameraFile::V4L2CameraFile(int dirfd, const char *path, int efd,
bool nonBlocking, V4L2CameraProxy *proxy)
: proxy_(proxy), nonBlocking_(nonBlocking), efd_(efd),
priority_(V4L2_PRIORITY_DEFAULT)
{
proxy_->open(this);
if (path[0] != '/') {
if (dirfd == AT_FDCWD) {
char *cwd = getcwd(nullptr, 0);
if (cwd) {
description_ = std::string(cwd) + "/";
free(cwd);
} else {
description_ = std::string("(unreachable)/");
}
} else {
description_ = "(dirfd:" + std::to_string(dirfd) + ")/";
}
}
description_ += std::string(path) + " (fd:" + std::to_string(efd) + ")";
}
V4L2CameraFile::~V4L2CameraFile()
{
proxy_->close(this);
}
const std::string &V4L2CameraFile::description() const
{
return description_;
}