use non-blocking open() not to hang on FIFO files, etc.
diff --git a/src/core/ngx_open_file_cache.c b/src/core/ngx_open_file_cache.c
index 6aa66fd..a9c4532 100644
--- a/src/core/ngx_open_file_cache.c
+++ b/src/core/ngx_open_file_cache.c
@@ -490,7 +490,14 @@
}
if (!of->log) {
- fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
+
+ /*
+ * Use non-blocking open() not to hang on FIFO files, etc.
+ * This flag has no effect on a regular files.
+ */
+
+ fd = ngx_open_file(name, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
+ NGX_FILE_OPEN, 0);
} else {
fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN,
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index ccaf44a..f41eba5 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -64,6 +64,7 @@
#define NGX_FILE_OPEN 0
#define NGX_FILE_TRUNCATE O_CREAT|O_TRUNC
#define NGX_FILE_APPEND O_WRONLY|O_APPEND
+#define NGX_FILE_NONBLOCK O_NONBLOCK
#define NGX_FILE_DEFAULT_ACCESS 0644
#define NGX_FILE_OWNER_ACCESS 0600
diff --git a/src/os/win32/ngx_files.h b/src/os/win32/ngx_files.h
index 610fcd0..c5bb888 100644
--- a/src/os/win32/ngx_files.h
+++ b/src/os/win32/ngx_files.h
@@ -64,6 +64,7 @@
#define NGX_FILE_WRONLY GENERIC_WRITE
#define NGX_FILE_RDWR GENERIC_READ|GENERIC_WRITE
#define NGX_FILE_APPEND FILE_APPEND_DATA|SYNCHRONIZE
+#define NGX_FILE_NONBLOCK 0
#define NGX_FILE_CREATE_OR_OPEN OPEN_ALWAYS
#define NGX_FILE_OPEN OPEN_EXISTING
