From aa405810db44a121d42cab88d5bfecef40049e2e Mon Sep 17 00:00:00 2001
From: rakshasa <sundell.software@gmail.com>
Date: Fri, 18 Feb 2005 21:51:13 +0000
Subject: [PATCH] Added help text and port range option.

git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@288 e378c898-3ddf-0310-93e7-cc216c733640
---
 README               |  5 ++++
 src/main.cc          | 70 ++++++++++++++++++++++++++++----------------
 src/option_parser.cc |  2 +-
 3 files changed, 50 insertions(+), 27 deletions(-)

diff --git a/README b/README
index 659d05aa..8b2bc1a9 100644
--- a/README
+++ b/README
@@ -1,3 +1,8 @@
+Options and flags:
+
+  -p <a-b>    Open a port in the range a to b.
+
+
 All:
 
   Ctrl-Q  - Quit
diff --git a/src/main.cc b/src/main.cc
index 4765c016..fb50fae3 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -27,6 +27,9 @@ int64_t Timer::m_cache;
 bool start_shutdown = false;
 bool is_shutting_down = false;
 
+void do_panic(int signum);
+void print_help();
+
 bool
 is_resized() {
   static int x = 0;
@@ -66,32 +69,6 @@ do_shutdown(ui::Control* c) {
   start_shutdown = false;
 }
 
-void
-do_panic(int signum) {
-  display::Canvas::cleanup();
-
-  std::cout << "Signal " << (signum == SIGSEGV ? "SIGSEGV" : "SIGBUS") << " recived, dumping stack:" << std::endl;
-  
-#ifdef USE_EXECINFO
-  void* stackPtrs[20];
-
-  // Print the stack and exit.
-  int stackSize = backtrace(stackPtrs, 20);
-  char** stackStrings = backtrace_symbols(stackPtrs, stackSize);
-
-  for (int i = 0; i < stackSize; ++i)
-    std::cout << i << ' ' << stackStrings[i] << std::endl;
-
-#else
-  std::cout << "Stack dump not enabled." << std::endl;
-#endif
-  
-  if (signum == SIGBUS)
-    std::cout << "A bus error might mean you ran out of diskspace." << std::endl;
-  
-  exit(-1);
-}
-
 int
 main(int argc, char** argv) {
   ui::Control uiControl;
@@ -103,6 +80,7 @@ main(int argc, char** argv) {
   SignalHandler::set_handler(SIGBUS, sigc::bind(sigc::ptr_fun(&do_panic), SIGBUS));
 
   OptionParser optionParser;
+  optionParser.insert_flag('h', sigc::ptr_fun(&print_help));
   optionParser.insert_option('p', sigc::bind(sigc::ptr_fun(OptionParser::call_int_pair),
 					     sigc::mem_fun(uiControl.get_core(), &core::Manager::set_port_range)));
 
@@ -149,9 +127,49 @@ main(int argc, char** argv) {
     display::Canvas::cleanup();
 
     std::cout << "Caught exception: \"" << e.what() << '"' << std::endl;
+    return -1;
   }
 
   uiControl.get_core().cleanup();
 
   return 0;
 }
+
+void
+do_panic(int signum) {
+  display::Canvas::cleanup();
+
+  std::cout << "Signal " << (signum == SIGSEGV ? "SIGSEGV" : "SIGBUS") << " recived, dumping stack:" << std::endl;
+  
+#ifdef USE_EXECINFO
+  void* stackPtrs[20];
+
+  // Print the stack and exit.
+  int stackSize = backtrace(stackPtrs, 20);
+  char** stackStrings = backtrace_symbols(stackPtrs, stackSize);
+
+  for (int i = 0; i < stackSize; ++i)
+    std::cout << i << ' ' << stackStrings[i] << std::endl;
+
+#else
+  std::cout << "Stack dump not enabled." << std::endl;
+#endif
+  
+  if (signum == SIGBUS)
+    std::cout << "A bus error might mean you ran out of diskspace." << std::endl;
+  
+  exit(-1);
+}
+
+void
+print_help() {
+  std::cout << "Rakshasa's Torrent client. Neko-Mimi Mode-o!" << std::endl;
+  std::cout << "Usage: rtorrent [OPTIONS]... [FILE]... [URL]..." << std::endl;
+  std::cout << std::endl;
+  std::cout << "  -h                Display this very helpfull text" << std::endl;
+  std::cout << "  -p <int>-<int>    Set port range for incoming connections" << std::endl;
+  std::cout << std::endl;
+  std::cout << "Report bugs to <jaris@ifi.uio.no>." << std::endl;
+
+  exit(0);
+}
diff --git a/src/option_parser.cc b/src/option_parser.cc
index 83939178..5d40933f 100644
--- a/src/option_parser.cc
+++ b/src/option_parser.cc
@@ -30,7 +30,7 @@ OptionParser::process(int argc, char** argv) {
   while ((c = getopt(argc, argv, optString.c_str())) != -1) {
     if (c == '?') {
       std::stringstream s;
-      s << "Invalid use of option flag -" << (char)optopt;
+      s << "Invalid use of option flag -" << (char)optopt << ". Try rtorrent -h for more information.";
       
       throw std::runtime_error(s.str());