From 950765ba1034f125ae8106f1f554bb362abfa108 Mon Sep 17 00:00:00 2001
From: Martin Winter <mwinter@opensourcerouting.org>
Date: Tue, 24 Jan 2017 22:42:11 +0700
Subject: [PATCH] lib: Add set_socket_path() to sockopt.c to override the path
 element of a (vty) socket (but keep filename)

Signed-off-by: Martin Winter <mwinter@opensourcerouting.org>
---
 lib/sockopt.c | 23 +++++++++++++++++++++++
 lib/sockopt.h |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/lib/sockopt.c b/lib/sockopt.c
index 461e1f7f54..570b575a7a 100644
--- a/lib/sockopt.c
+++ b/lib/sockopt.c
@@ -29,6 +29,29 @@
 #include "sockopt.h"
 #include "sockunion.h"
 
+/* Replace the path of given defaultpath with newpath, but keep filename */
+void
+set_socket_path (char *path, char *defaultpath, char *newpath, int maxsize)
+{
+  char *sock_name;
+
+  sock_name = strrchr(defaultpath, '/');
+  if (sock_name)
+    /* skip '/' */
+    sock_name++;
+  else
+    /*
+     * VTYSH_PATH configured as relative path
+     * during config? Should really never happen for
+     * sensible config
+     */
+    sock_name = defaultpath;
+
+  strlcpy (path, newpath, maxsize);
+  strlcat (path, "/", maxsize);
+  strlcat (path, sock_name, maxsize);
+}
+
 void
 setsockopt_so_recvbuf (int sock, int size)
 {
diff --git a/lib/sockopt.h b/lib/sockopt.h
index b3ab57ab71..8e7895dd6f 100644
--- a/lib/sockopt.h
+++ b/lib/sockopt.h
@@ -24,6 +24,9 @@
 
 #include "sockunion.h"
 
+/* Override (vty) socket paths, but keep the filename */
+extern void set_socket_path (char *path, char *defaultpath, char *newpath, int maxsize);
+
 extern void setsockopt_so_recvbuf (int sock, int size);
 extern void setsockopt_so_sendbuf (const int sock, int size);
 extern int getsockopt_so_sendbuf (const int sock);