new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_recv_chain.c
@@ -0,0 +1,42 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_errno.h>
+#include <ngx_log.h>
+#include <ngx_connection.h>
+
+
+ssize_t ngx_recv_chain(ngx_connection_t *c, ngx_chain_t *ce)
+{
+    int              n;
+    struct iovec   *iov;
+    ngx_err_t       err;
+    ngx_array_t     io;
+
+    ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR);
+
+    while (ce) {
+        ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR);
+        iov->iov_base = ce->hunk->pos;
+        iov->iov_len = ce->hunk->last - ce->hunk->pos;
+        ce = ce->next;
+    }
+
+    n = readv(c->fd, (struct iovec *) io.elts, io.nelts);
+
+    ngx_destroy_array(&io);
+
+    if (n == -1) {
+        c->read->ready = 0;
+
+        if (err == NGX_EAGAIN) {
+            ngx_log_error(NGX_LOG_INFO, c->log, err, "readv() returned EAGAIN");
+            return NGX_AGAIN;
+        }
+
+        ngx_log_error(NGX_LOG_ERR, c->log, err, "readv() failed");
+        return NGX_ERROR;
+    }
+
+    return n;
+}