From a84b0f3f082025dec737a537a9a443bdd6d6af9d Mon Sep 17 00:00:00 2001
From: FedericoHeichou <34757141+FedericoHeichou@users.noreply.github.com>
Date: Wed, 22 Feb 2023 06:08:16 +0100
Subject: [PATCH] Fix race-condition with two parallel PURGE (#42)

---
 ngx_cache_purge_module.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ngx_cache_purge_module.c b/ngx_cache_purge_module.c
index 1ea54e4..251d3fe 100644
--- a/ngx_cache_purge_module.c
+++ b/ngx_cache_purge_module.c
@@ -1337,6 +1337,9 @@ ngx_http_purge_file_cache_delete_partial_file(ngx_tree_ctx_t *ctx, ngx_str_t *pa
         file.offset = file.sys_offset = 0;
         file.fd = ngx_open_file(path->data, NGX_FILE_RDONLY, NGX_FILE_OPEN,
                                 NGX_FILE_DEFAULT_ACCESS);
+        if (file.fd == -1) {
+            return NGX_OK;
+        }
         file.log = ctx->log;
 
         /* I don't know if it's a good idea to use the ngx_cycle pool for this,