core: unset HOME=/ that the kernel gives us

Partially fixes #12389.

%h would return "/" in a machine, but "/root" in a container. Let's fix
this by resetting $HOME to the expected value.

diff --git a/src/core/main.c b/src/core/main.c
index e34da119846cbcb8a6f07bab14cf1163033be7cc..d65455c6c06cb52c380f9af56f60b88765f8c986 100644 (file)
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -1546,6 +1546,11 @@ static int fixup_environment(void) {
         if (setenv("TERM", t, 1) < 0)
                 return -errno;
 
+        /* The kernels sets HOME=/ for init. Let's undo this. */
+        if (path_equal_ptr(getenv("HOME"), "/") &&
+            unsetenv("HOME") < 0)
+                log_warning_errno(errno, "Failed to unset $HOME: %m");
+
         return 0;
 }