From f2ae2badff37c008ba8217a12f8ee6dc6a3c5a39 Mon Sep 17 00:00:00 2001
From: "Ondrej Zajicek (work)" <santiago@crfreenet.org>
Date: Thu, 7 Apr 2016 12:20:45 +0200
Subject: [PATCH] Main: Add local option

Add option that changes default paths for config file and control socket
to the current working directory.
---
 client/client.c    | 10 ++++++++--
 doc/bird.sgml      |  5 +++++
 lib/string.h       |  6 ++++++
 sysdep/unix/main.c | 16 +++++++++++++---
 4 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/client/client.c b/client/client.c
index b938f344..4075b9e6 100644
--- a/client/client.c
+++ b/client/client.c
@@ -37,7 +37,7 @@
 
 #define SERVER_READ_BUF_LEN 4096
 
-static char *opt_list = "s:vr";
+static char *opt_list = "s:vrl";
 static int verbose, restricted, once;
 static char *init_cmd;
 
@@ -59,13 +59,14 @@ int term_lns, term_cls;
 static void
 usage(char *name)
 {
-  fprintf(stderr, "Usage: %s [-s <control-socket>] [-v] [-r]\n", name);
+  fprintf(stderr, "Usage: %s [-s <control-socket>] [-v] [-r] [-l]\n", name);
   exit(1);
 }
 
 static void
 parse_args(int argc, char **argv)
 {
+  int server_changed = 0;
   int c;
 
   while ((c = getopt(argc, argv, opt_list)) >= 0)
@@ -73,6 +74,7 @@ parse_args(int argc, char **argv)
       {
       case 's':
 	server_path = optarg;
+	server_changed = 1;
 	break;
       case 'v':
 	verbose++;
@@ -80,6 +82,10 @@ parse_args(int argc, char **argv)
       case 'r':
 	restricted = 1;
 	break;
+      case 'l':
+	if (!server_changed)
+	  server_path = xbasename(server_path);
+	break;
       default:
 	usage(argv[0]);
       }
diff --git a/doc/bird.sgml b/doc/bird.sgml
index 5e5aeee4..5e943d7c 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -171,6 +171,11 @@ BIRD executable by configuring out routing protocols you don't use, and
 	<tag>-f</tag>
 	run bird in foreground.
 
+	<tag>-l</tag>
+	look for a configuration file and a communication socket in the current
+	working directory instead of in default system paths. However, paths
+	specified by options <cf/-c/, <cf/-s/ have higher priority.
+
 	<tag>-R</tag>
 	apply graceful restart recovery after start.
 </descrip>
diff --git a/lib/string.h b/lib/string.h
index 218f7b1c..0f249d37 100644
--- a/lib/string.h
+++ b/lib/string.h
@@ -24,4 +24,10 @@ void buffer_puts(buffer *buf, const char *str);
 
 int patmatch(const byte *pat, const byte *str);
 
+static inline char *xbasename(const char *str)
+{
+  char *s = strrchr(str, '/');
+  return s ? s+1 : (char *) str;
+}
+
 #endif
diff --git a/sysdep/unix/main.c b/sysdep/unix/main.c
index 5d5586a0..11a4acc6 100644
--- a/sysdep/unix/main.c
+++ b/sysdep/unix/main.c
@@ -617,7 +617,7 @@ signal_init(void)
  *	Parsing of command-line arguments
  */
 
-static char *opt_list = "c:dD:ps:P:u:g:fR";
+static char *opt_list = "c:dD:ps:P:u:g:flR";
 static int parse_and_exit;
 char *bird_name;
 static char *use_user;
@@ -627,7 +627,7 @@ static int run_in_foreground = 0;
 static void
 usage(void)
 {
-  fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-P <pid-file>] [-u <user>] [-g <group>] [-f] [-R]\n", bird_name);
+  fprintf(stderr, "Usage: %s [-c <config-file>] [-d] [-D <debug-file>] [-p] [-s <control-socket>] [-P <pid-file>] [-u <user>] [-g <group>] [-f] [-l] [-R]\n", bird_name);
   exit(1);
 }
 
@@ -677,7 +677,7 @@ get_gid(const char *s)
 
   if (!s)
     return 0;
-  
+
   errno = 0;
   rv = strtol(s, &endptr, 10);
 
@@ -694,6 +694,8 @@ get_gid(const char *s)
 static void
 parse_args(int argc, char **argv)
 {
+  int config_changed = 0;
+  int socket_changed = 0;
   int c;
 
   bird_name = get_bird_name(argv[0], "bird");
@@ -712,6 +714,7 @@ parse_args(int argc, char **argv)
       {
       case 'c':
 	config_name = optarg;
+	config_changed = 1;
 	break;
       case 'd':
 	debug_flag |= 1;
@@ -725,6 +728,7 @@ parse_args(int argc, char **argv)
 	break;
       case 's':
 	path_control_socket = optarg;
+	socket_changed = 1;
 	break;
       case 'P':
 	pid_file = optarg;
@@ -738,6 +742,12 @@ parse_args(int argc, char **argv)
       case 'f':
 	run_in_foreground = 1;
 	break;
+      case 'l':
+	if (!config_changed)
+	  config_name = xbasename(config_name);
+	if (!socket_changed)
+	  path_control_socket = xbasename(path_control_socket);
+	break;
       case 'R':
 	graceful_restart_recovery();
 	break;