From 4777e74862be35b6a31886933dbaae820c65b370 Mon Sep 17 00:00:00 2001
From: Christian Hergert <chergert@redhat.com>
Date: Wed, 24 Feb 2021 13:03:24 -0800
Subject: [PATCH] sysprofd: ftruncate() when overwriting files

This is really only used for proc like files which are generally a single
page, but might as well start from zero.
---
 src/sysprofd/ipc-service-impl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/sysprofd/ipc-service-impl.c b/src/sysprofd/ipc-service-impl.c
index da9bf473..37229081 100644
--- a/src/sysprofd/ipc-service-impl.c
+++ b/src/sysprofd/ipc-service-impl.c
@@ -78,6 +78,8 @@ file_set_contents_no_backup (const gchar  *path,
       return FALSE;
     }
 
+  ftruncate (fd, 0);
+
   if (write (fd, contents, len) != len)
     {
       int errsv = errno;