From f6aa963667da52b753459150edf5a297332d3196 Mon Sep 17 00:00:00 2001
From: LIU Hao <lh_mouse@126.com>
Date: Tue, 23 Jan 2024 22:52:22 +0800
Subject: [PATCH] main: Get rid a warning about unused results

---
 poseidon/main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/poseidon/main.cpp b/poseidon/main.cpp
index 9e7eb347..0e5691e7 100644
--- a/poseidon/main.cpp
+++ b/poseidon/main.cpp
@@ -540,7 +540,7 @@ do_write_pid_file()
     // Write the PID of myself. Errors are ignored.
     POSEIDON_LOG_DEBUG(("Writing current process ID to '$1'"), pid_file_path.c_str());
     ::dprintf(pid_file_fd, "%d\n", (int) ::getpid());
-    ::at_quick_exit([] { ::ftruncate(pid_file_fd, 0);  });
+    ::at_quick_exit([] { (void)! ::ftruncate(pid_file_fd, 0);  });
 
     // Downgrade the lock so the PID may be read by others.
     ::flock(pid_file_fd, LOCK_SH);