| /* SPDX-License-Identifier: LGPL-2.1-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> |
| |
| #include <libcamera/base/utils.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 int __open_2(const char *path, int oflag) |
| { |
| return open(path, oflag); |
| } |
| |
| #ifndef open64 |
| LIBCAMERA_PUBLIC int open64(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 | O_LARGEFILE, mode); |
| } |
| |
| LIBCAMERA_PUBLIC int __open64_2(const char *path, int oflag) |
| { |
| return open(path, oflag); |
| } |
| #endif |
| |
| 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 int __openat_2(int dirfd, const char *path, int oflag) |
| { |
| return openat(dirfd, path, oflag); |
| } |
| |
| #ifndef openat64 |
| LIBCAMERA_PUBLIC int openat64(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 | O_LARGEFILE, mode); |
| } |
| |
| LIBCAMERA_PUBLIC int __openat64_2(int dirfd, const char *path, int oflag) |
| { |
| return openat(dirfd, path, oflag); |
| } |
| #endif |
| |
| 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); |
| } |
| |
| #ifndef mmap64 |
| LIBCAMERA_PUBLIC void *mmap64(void *addr, size_t length, int prot, int flags, |
| int fd, off64_t offset) |
| { |
| return V4L2CompatManager::instance()->mmap(addr, length, prot, flags, |
| fd, offset); |
| } |
| #endif |
| |
| 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); |
| } |
| |
| } |