commit ef76fbebd6dc0b05a12ff3c19b70ab0ec9c118df
author Valentin Bartenev <vbart@nginx.com> Thu Aug 15 19:14:33 2013 +0400
committer Valentin Bartenev <vbart@nginx.com> Thu Aug 15 19:14:33 2013 +0400
tree 0e8f3cf47bfd90235632d6bcc22e7597c79e5cd5
parent 9aaf256e4024e278e099c94281246aada63fc2fa

Unbreak building on Linux without sendfile64() support.

It was broken in 8e446a2daf48 when the NGX_SENDFILE_LIMIT constant was added
to ngx_linux_sendfile_chain.c having the same name as already defined one in
ngx_linux_config.h.

The newer is needed to overcome a bug in old Linux kernels by limiting the
number of bytes to send per sendfile() syscall.  The older is used with
sendfile() on ancient kernels that works with 32-bit offsets only.

One of these renamed to NGX_SENDFILE_MAXSIZE.

src/os/unix/ngx_linux_sendfile_chain.c

diff --git a/src/os/unix/ngx_linux_sendfile_chain.c b/src/os/unix/ngx_linux_sendfile_chain.c
index 8c4d59c..431542d 100644
--- a/src/os/unix/ngx_linux_sendfile_chain.c
+++ b/src/os/unix/ngx_linux_sendfile_chain.c
@@ -24,7 +24,7 @@
  * so we limit it to 2G-1 bytes.
  */
 
-#define NGX_SENDFILE_LIMIT  2147483647L
+#define NGX_SENDFILE_MAXSIZE  2147483647L
 
 
 #if (IOV_MAX > 64)
@@ -63,8 +63,8 @@
 
     /* the maximum limit size is 2G-1 - the page size */
 
-    if (limit == 0 || limit > (off_t) (NGX_SENDFILE_LIMIT - ngx_pagesize)) {
-        limit = NGX_SENDFILE_LIMIT - ngx_pagesize;
+    if (limit == 0 || limit > (off_t) (NGX_SENDFILE_MAXSIZE - ngx_pagesize)) {
+        limit = NGX_SENDFILE_MAXSIZE - ngx_pagesize;
     }