On Thu, Oct 22, 2020 at 9:40 AM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > On Thu, Oct 22, 2020 at 04:35:17PM +0000, David Laight wrote: > > Wait... > > readv(2) defines: > > ssize_t readv(int fd, const struct iovec *iov, int iovcnt); > > It doesn't really matter what the manpage says. What does the AOSP > libc header say? Same: https://android.googlesource.com/platform/bionic/+/refs/heads/master/libc/include/sys/uio.h#38 Theoretically someone could bypass libc to make a system call, right? > > > But the syscall is defined as: > > > > SYSCALL_DEFINE3(readv, unsigned long, fd, const struct iovec __user *, vec, > > unsigned long, vlen) > > { > > return do_readv(fd, vec, vlen, 0); > > } > -- Thanks, ~Nick Desaulniers
