1 #include "stdio_impl.h"
3 size_t __stdio_read(FILE *f, unsigned char *buf, size_t len)
5 struct iovec iov[2] = {
6 { .iov_base = buf, .iov_len = len - !!f->buf_size },
7 { .iov_base = f->buf, .iov_len = f->buf_size }
11 cnt = syscall(SYS_readv, f->fd, iov, 2);
13 f->flags |= F_EOF ^ ((F_ERR^F_EOF) & cnt);
14 f->rpos = f->rend = 0;
17 if (cnt <= iov[0].iov_len) return cnt;
18 cnt -= iov[0].iov_len;
20 f->rend = f->buf + cnt;
21 if (f->buf_size) buf[len-1] = *f->rpos++;