X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2F__stdio_read.c;h=218bd88d18df42d908dc121600af2cf242cb9abd;hb=28af39fe427ffec8b836f4f30450ffc30b03e5c4;hp=d9bb3269c41821031be8e5c8e1d95020fbe03218;hpb=aa398f56fa398f2202b04e82c67f822f3233786f;p=musl

diff --git a/src/stdio/__stdio_read.c b/src/stdio/__stdio_read.c
index d9bb3269..218bd88d 100644
--- a/src/stdio/__stdio_read.c
+++ b/src/stdio/__stdio_read.c
@@ -2,5 +2,22 @@
 
 size_t __stdio_read(FILE *f, unsigned char *buf, size_t len)
 {
-	return syscall(SYS_read, f->fd, buf, len);
+	struct iovec iov[2] = {
+		{ .iov_base = buf, .iov_len = len - !!f->buf_size },
+		{ .iov_base = f->buf, .iov_len = f->buf_size }
+	};
+	ssize_t cnt;
+
+	cnt = syscall(SYS_readv, f->fd, iov, 2);
+	if (cnt <= 0) {
+		f->flags |= F_EOF ^ ((F_ERR^F_EOF) & cnt);
+		f->rpos = f->rend = 0;
+		return cnt;
+	}
+	if (cnt <= iov[0].iov_len) return cnt;
+	cnt -= iov[0].iov_len;
+	f->rpos = f->buf;
+	f->rend = f->buf + cnt;
+	if (f->buf_size) buf[len-1] = *f->rpos++;
+	return len;
 }