Allow user space file locations (rootless support) Why: Running dropbear as a user (rootless) is aided if files and programs can be saved/removed without needing sudo. What: Use the same convention as DROPBEAR_DEFAULT_CLI_AUTHKEY; if not starting with '/', then is relative to hedge's /home/hedge: *_PRIV_FILENAME DROPBEAR_PIDFILE SFTPSERVER_PATH default_options.h commentary added. Changes kept to a minimum, so log entry in svr_kex.c#163 is refactored. From: Generated hostkey is <path> ... <finger-print> to: Generated hostkey path is <path> Generated hostkey fingerprint is <fp> Otherwise the unexpanded path was reported. Patch modified by Matt Johnston Signed-off-by: Begley Brothers Inc <[email protected]>

--- a/svr-chansession.c	Wed Mar 30 12:56:09 2022 +0800
+++ b/svr-chansession.c	Thu Jul 09 17:47:58 2020 +1000
@@ -685,8 +685,10 @@
 		if (issubsys) {
 #if DROPBEAR_SFTPSERVER
 			if ((cmdlen == 4) && strncmp(chansess->cmd, "sftp", 4) == 0) {
+				char *expand_path = expand_homedir_path(SFTPSERVER_PATH);
 				m_free(chansess->cmd);
-				chansess->cmd = m_strdup(SFTPSERVER_PATH);
+				chansess->cmd = m_strdup(expand_path);
+				m_free(expand_path);
 			} else 
 #endif
 			{