fix posix_fadvise() error handling
diff --git a/src/os/unix/ngx_files.c b/src/os/unix/ngx_files.c
index 2264cc1..0ef0838 100644
--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -402,6 +402,26 @@
}
+#if (NGX_HAVE_POSIX_FADVISE)
+
+ngx_int_t
+ngx_read_ahead(ngx_fd_t fd, size_t n)
+{
+ int err;
+
+ err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
+
+ if (err == 0) {
+ return 0;
+ }
+
+ ngx_set_errno(err);
+ return NGX_FILE_ERROR;
+}
+
+#endif
+
+
#if (NGX_HAVE_O_DIRECT)
ngx_int_t
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index 2efd247..ccaf44a 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -264,7 +264,7 @@
#define NGX_HAVE_READ_AHEAD 1
-#define ngx_read_ahead(fd, n) posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL)
+ngx_int_t ngx_read_ahead(ngx_fd_t fd, size_t n);
#define ngx_read_ahead_n "posix_fadvise(POSIX_FADV_SEQUENTIAL)"
#else
