Backport of:

From 4e2b52b5f7a3bf50a0f1494155717b02cc1df6d6 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 9 Mar 2023 16:22:11 +0100
Subject: [PATCH] curl_path: create the new path with dynbuf

Closes #10729
---
 lib/curl_path.c | 75 +++++++++++++++++++++++--------------------------
 1 file changed, 35 insertions(+), 40 deletions(-)


--- a/lib/curl_path.c
+++ b/lib/curl_path.c
@@ -60,7 +60,7 @@ CURLcode Curl_getworkingpath(struct conn
       memcpy(real_path, working_path, 1 + working_path_len);
   }
   else if(conn->handler->protocol & CURLPROTO_SFTP) {
-    if((working_path_len > 1) && (working_path[1] == '~')) {
+    if((working_path_len > 2) && !memcmp(working_path, "/~/", 3)) {
       size_t homelen = strlen(homedir);
       real_path = malloc(homelen + working_path_len + 1);
       if(real_path == NULL) {