From deeb60fa6ab181ad8256d23460514d991e2e6539 Mon Sep 17 00:00:00 2001
From: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Date: Thu, 7 Oct 2021 11:11:08 +0200
Subject: [PATCH] gnss: warn if ftruncate() fails

---
 src/gnss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gnss.c b/src/gnss.c
index 502612c..6503943 100644
--- a/src/gnss.c
+++ b/src/gnss.c
@@ -216,7 +216,8 @@ static void fetch_assistance_data(struct EG25Manager *manager)
     }
 
     lseek(manager->gnss_assistance_fd, 0, SEEK_SET);
-    ftruncate(manager->gnss_assistance_fd, 0);
+    if (ftruncate(manager->gnss_assistance_fd, 0) < 0)
+        g_warning("Unable to truncate file, assistance data might be invalid!");
     url = g_strconcat(manager->gnss_assistance_url, "/",
                       manager->gnss_assistance_file, NULL);