2 files changed, 67 insertions, 1 deletions

diff --git a/src/os/unix/ngx_files.c b/src/os/unix/ngx_files.c
index c9e62b2b7..8aac3e27e 100644
--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -12,7 +12,7 @@ ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
     n = pread(file->fd, buf, size, offset);
 
     if (n == -1) {
-        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "read() failed");
+        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "pread() failed");
         return NGX_ERROR;
     }
 
@@ -21,6 +21,30 @@ ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
     return n;
 }
 
+
+ssize_t ngx_write_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
+{
+    ssize_t n;
+
+    n = pwrite(file->fd, buf, size, offset);
+
+    if (n == -1) {
+        ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "pwrite() failed");
+        return NGX_ERROR;
+    }
+
+    if (n != size) {
+        ngx_log_error(NGX_LOG_ERR, file->log, 0,
+                      "pwrite() has written only %d of %d", n, size);
+        return NGX_ERROR;
+    }
+
+    file->offset += n;
+
+    return n;
+}
+
+
 #if 0
 
 ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
diff --git a/src/os/unix/ngx_recv_chain.c b/src/os/unix/ngx_recv_chain.c
new file mode 100644
index 000000000..221f306cd
--- /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;
+}