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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* v4l2_compat.cpp - V4L2 compatibility layer
*/
#include "v4l2_compat_manager.h"
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#define LIBCAMERA_PUBLIC __attribute__((visibility("default")))
using namespace libcamera;
#define extract_va_arg(type, arg, last) \
{ \
va_list ap; \
va_start(ap, last); \
arg = va_arg(ap, type); \
va_end(ap); \
}
extern "C" {
LIBCAMERA_PUBLIC int open(const char *path, int oflag, ...)
{
mode_t mode = 0;
if (oflag & O_CREAT || oflag & O_TMPFILE)
extract_va_arg(mode_t, mode, oflag);
return V4L2CompatManager::instance()->openat(AT_FDCWD, path,
oflag, mode);
}
/* _FORTIFY_SOURCE redirects open to __open_2 */
LIBCAMERA_PUBLIC extern __typeof(open) __open_2 __attribute__ ((alias("open")));
LIBCAMERA_PUBLIC int openat(int dirfd, const char *path, int oflag, ...)
{
mode_t mode = 0;
if (oflag & O_CREAT || oflag & O_TMPFILE)
extract_va_arg(mode_t, mode, oflag);
return V4L2CompatManager::instance()->openat(dirfd, path, oflag, mode);
}
LIBCAMERA_PUBLIC extern __typeof(openat) __openat_2 __attribute__ ((alias("openat")));
LIBCAMERA_PUBLIC int dup(int oldfd)
{
return V4L2CompatManager::instance()->dup(oldfd);
}
LIBCAMERA_PUBLIC int close(int fd)
{
return V4L2CompatManager::instance()->close(fd);
}
LIBCAMERA_PUBLIC void *mmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset)
{
return V4L2CompatManager::instance()->mmap(addr, length, prot, flags,
fd, offset);
}
LIBCAMERA_PUBLIC int munmap(void *addr, size_t length)
{
return V4L2CompatManager::instance()->munmap(addr, length);
}
LIBCAMERA_PUBLIC int ioctl(int fd, unsigned long request, ...)
{
void *arg;
extract_va_arg(void *, arg, request);
return V4L2CompatManager::instance()->ioctl(fd, request, arg);
}
}
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