Resolve "stat is needed in libc in MN5"

    char data[1] __attribute__((aligned(__alignof__(void*))));

}; // Originally its 0, but C++ does not permit it

//------------------------- File I/O Operations ------------------------------//

int

open(const char* path, int flags, ...);

int

open64(const char* path, int flags, ...);

int

openat(int dirfd, const char* path, int flags, ...);

int

openat64(int dirfd, const char* path, int flags,

         ...); // Note: Implemented via openat in source

int

creat(const char* path, mode_t mode);

int

close(int fd);

int

close_range(unsigned int low, unsigned int high, int flags);

ssize_t

read(int fd, void* buf, size_t nbyte);

ssize_t

write(int fd, const void* buf, size_t nbyte);

ssize_t

pread(int fd, void* buf, size_t count, off_t offset);

ssize_t

pwrite(int fd, const void* buf, size_t count, off_t offset);

ssize_t

pread64(int fd, void* buf, size_t count, off64_t offset);

ssize_t

pwrite64(int fd, const void* buf, size_t count, off64_t offset);

ssize_t

readv(int fd, const struct iovec* iov, int iovcnt);

ssize_t

writev(int fd, const struct iovec* iov, int iovcnt);

ssize_t

preadv(int fd, const struct iovec* iov, int iovcnt, off_t offset);

ssize_t

pwritev(int fd, const struct iovec* iov, int iovcnt, off_t offset);

ssize_t

preadv2(int fd, const struct iovec* iov, int iovcnt, off_t offset, int flags);

ssize_t

pwritev2(int fd, const struct iovec* iov, int iovcnt, off_t offset, int flags);

off_t

lseek(int fd, off_t offset, int whence);

off64_t

lseek64(int fd, off64_t offset, int whence);

int

ftruncate(int fd, off_t length);

int

fsync(int fd);

int

flock(int fd, int operation);

//------------------------- Stat / Metadata Operations

//-------------------------//

int

stat(const char* path, struct stat* buf);

int

stat64(const char* path,

       struct stat64* buf); // Note: Source uses __xstat64 symbol

int

lstat(const char* path, struct stat* st);

int

lstat64(const char* path, struct stat64* buf);

int

fstat(int fd, struct stat* buf);

int

fstat64(int fd, struct stat64* buf);

int

fstatat(int dfd, const char* path, struct stat* buf, int flags);

int

fstatat64(int dfd, const char* path, struct stat64* buf, int flags);

int

statx(int dirfd, const char* path, int flags, unsigned int mask,

      struct statx* statxbuf);

int

__xstat(int ver, const char* path, struct stat* buf);

int

__xstat64(int ver, const char* path, struct stat64* buf);

int

__lxstat(int ver, const char* path, struct stat* buf);

int

__lxstat64(int ver, const char* path, struct stat64* buf);

int

__fxstat(int ver, int fd, struct stat* buf);

int

__fxstatat(int ver, int dfd, const char* path, struct stat* buf, int flags);

int

__fxstat64(int ver, int fd, struct stat64* buf);

//------------------------- Directory Operations -----------------------------//

int

mkdir(const char* path, mode_t mode);

int

mkdirat(int dirfd, const char* path, mode_t mode);

int

rmdir(const char* path);

DIR*

opendir(const char* dirname);

DIR*

opendir64(const char* dirname);

DIR*

fdopendir(int fd);

// For scandir filter and compar function pointer types

typedef int (*scandir_filter_func_t)(const struct dirent*);

typedef int (*scandir_compar_func_t)(const struct dirent**,

                                     const struct dirent**);

// Note: Original source uses `typeof` (GNU extension) for filter/compar in

// scandir. Using standard function pointer typedefs here for better

// portability.

struct dirent*

readdir(DIR* dirp);

struct dirent64*

readdir64(DIR* dirp);

int

closedir(DIR* dirp);

void

seekdir(DIR* dirp, long loc);

long

telldir(DIR* dirp);

void

rewinddir(DIR* dirstream);

int

scandir(const char* dirname, struct dirent*** namelist,

        scandir_filter_func_t filter, scandir_compar_func_t compar);

//------------------------- Path Operations ----------------------------------//

int

remove(const char* path);

int

unlink(const char* path);

int

rename(const char* oldpath, const char* newpath);

int

renameat(int olddirfd, const char* oldpath, int newdirfd, const char* newpath);

int

renameat2(int olddirfd, const char* oldpath, int newdirfd, const char* newpath,

          unsigned int flags);

int

symlink(const char* target_path,

        const char* link_path); // POSIX: target, linkpath

int

symlinkat(const char* target_path, int newdirfd, const char* link_path);

#ifdef HAS_SYMLINKS

ssize_t

readlink(const char* path, char* buf, size_t bufsize);

ssize_t

readlinkat(int dfd, const char* path, char* buf, size_t bufsize);

#endif

char*

realpath(const char* path, char* resolved_path);

char*

__realpath_chk(const char* path, char* resolved_path,

               size_t resolved_len); // GNU Fortify Source variant

int

access(const char* path, int mode);

int

faccessat(int dfd, const char* path, int mode, int flags);

int

chdir(const char* path);

int

fchdir(int fd);

char*

getcwd(char* buffer, size_t size);

//------------------------- Permissions --------------------------------------//

int

chmod(const char* path, mode_t mode);

int

fchmod(int fd, mode_t mode);

int

fchmodat(int dfd, const char* path, mode_t mode, int flags);

int

chown(const char* path, uid_t owner, gid_t group);

int

fchown(int fd, uid_t owner, gid_t group);

//------------------------- Process and Descriptor Management

//------------------//

int

dup(int fd);

int

dup2(int oldfd, int newfd);

int

dup3(int oldfd, int newfd, int flags);

int

fcntl(int fd, int cmd, ...);

#ifdef GKFS_ENABLE_UNUSED_FUNCTIONS

void

exit(int status); // Note: This function does not return.

int

pipe(int pipefd[2]);

#endif

//------------------------- C Standard I/O (FILE*) ---------------------------//

FILE*

fopen(const char* path, const char* mode);

FILE*

fdopen(int fd, const char* mode);

FILE*

freopen64(const char* path, const char* mode,

          FILE* stream); // Note: Source uses "freopen" symbol

int

fclose(FILE* stream);

size_t

fread(void* ptr, size_t size, size_t nmemb, FILE* stream);

size_t

fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream);

int

fseek(FILE* stream, long int offset, int whence);

long

ftell(FILE* stream);

void

rewind(FILE* stream);

int

feof(FILE* stream);

void

clearerr(FILE* stream);

int

fputs(const char* str, FILE* stream);

char*

fgets(char* str, int n, FILE* stream);

int

fflush(FILE* stream);

//------------------------- AIO Operations -----------------------------------//

int

aio_read(struct aiocb* aiocbp);

int

aio_write(struct aiocb* aiocbp);

int

aio_error(const struct aiocb* aiocbp);

ssize_t

aio_return(struct aiocb* aiocbp);

//------------------------- Miscellaneous / Unsorted

//---------------------------//

int

mkstemp(char* templates);

#ifdef GKFS_ENABLE_UNUSED_FUNCTIONS

int

futimes(int fd, const struct timeval tv[2]);

int

utimes(const char* path, const struct timeval tv[2]);

ssize_t

listxattr(const char* path, char* list, size_t size);

ssize_t

llistxattr(const char* path, char* list, size_t size);

ssize_t

flistxattr(int fd, char* list, size_t size);

#endif

//========================= C++ ABI Interceptions

//==============================//

// Intercepting C++ std::filesystem::remove_all

// The mangled name can vary with compiler/STL version.

// This specific name _ZNSt10filesystem10remove_allERKNS_7__cxx114pathE

// is for a GCC/libstdc++ compiled version of std::filesystem::remove_all(const

// std::filesystem::path&) To be link-time intercepted, it needs to be declared

// extern "C".

int

_ZNSt10filesystem10remove_allERKNS_7__cxx114pathE(

        const std::filesystem::path& p);

#ifdef __cplusplus

}

#endif

              (dirfd, path, flags, mask, buf), "statx")

DLSYM_WRAPPER(int, xstat64, (int ver, const char* path, struct stat64* buf),

              (ver, path, buf), "__xstat64")

#ifdef GKFS_ENABLE_UNUSED_FUNCTIONS // __xstat variants

DLSYM_WRAPPER(int, lxstat64, (int ver, const char* path, struct stat64* buf),

              (ver, path, buf), "__lxstat64")

DLSYM_WRAPPER(int, __lxstat, (int ver, const char* path, struct stat* buf),

DLSYM_WRAPPER(int, fxstatat,

              (int ver, int dfd, const char* path, struct stat* buf, int flags),

              (ver, dfd, path, buf, flags), "__fxstatat")

#endif

// Directory Operations

DLSYM_WRAPPER(int, mkdir, (const char* path, mode_t mode), (path, mode),

    GKFS_FALLBACK(statx, dirfd, path, flags, mask, statxbuf);

}

#ifdef GKFS_ENABLE_UNUSED_FUNCTIONS

// __xstat style functions (versioned)

int

__xstat(int ver, const char* path, struct stat* buf) {

// the versioned one. So, __fxstatat64 would need its own DLSYM_WRAPPER

// targeting "__fxstatat64" if it exists. For now, keeping as per what was

// explicitly in the original for __* variants.

#endif // GKFS_ENABLE_UNUSED_FUNCTIONS

//------------------------- Directory Operations -----------------------------//