From e6724664c3d8fa8669746192f647c1845f9857ff Mon Sep 17 00:00:00 2001
From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Mon, 22 Apr 2024 10:16:40 +0200
Subject: [PATCH] fd-util: Return 1 from fd_nonblock() if we actually change
 the mode

---
 src/basic/fd-util.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/basic/fd-util.c b/src/basic/fd-util.c
index 5d005302969..121e6cd2190 100644
--- a/src/basic/fd-util.c
+++ b/src/basic/fd-util.c
@@ -167,7 +167,10 @@ int fd_nonblock(int fd, bool nonblock) {
         if (nflags == flags)
                 return 0;
 
-        return RET_NERRNO(fcntl(fd, F_SETFL, nflags));
+        if (fcntl(fd, F_SETFL, nflags) < 0)
+                return -errno;
+
+        return 1;
 }
 
 int stdio_disable_nonblock(void) {