_kern_readv
extern ssize_t _kern_readv(int fd, off_t pos, const struct iovec *vecs,
extern ssize_t _kern_readv(int fd, off_t pos, const struct iovec *vecs,
bytes = _kern_readv(fd, -1, vecs, count);
bytes = _kern_readv(fd, pos, vecs, count);
fssh_ssize_t _kern_readv(int fd, fssh_off_t pos, const fssh_iovec *vecs,
extern "C" ssize_t _kern_readv(int fd, off_t pos, const struct iovec *vecs, size_t count);
return _kern_readv(fd, lseek(fd, 0, SEEK_CUR), systemVecs, count);
return _kern_readv(fd, pos, systemVecs, count);