From cc915eefafa89fe49da3afaf0f3fdaef24679b62 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 17 Jul 2024 17:54:09 +0200
Subject: [PATCH] env-util: suppress unnecessary setenv() in setenvf()

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

diff --git a/src/basic/env-util.c b/src/basic/env-util.c
index 3e385e5ee4b..cf2c47d2142 100644
--- a/src/basic/env-util.c
+++ b/src/basic/env-util.c
@@ -1146,5 +1146,10 @@ int setenvf(const char *name, bool overwrite, const char *valuef, ...) {
         if (r < 0)
                 return -ENOMEM;
 
+        /* Try to suppress writes if the value is already set correctly (simply because memory management of
+         * environment variables sucks a bit. */
+        if (streq_ptr(getenv(name), value))
+                return 0;
+
         return RET_NERRNO(setenv(name, value, overwrite));
 }