From b25f4dc131b9cd2b0575995d88f969627ce98ef6 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Tue, 12 Jan 2010 21:53:59 +0000
Subject: improved new SysExec cleanup

---
 src/anytun.cpp          |  4 ++--
 src/bsd/tunDevice.cpp   |  6 +++---
 src/linux/tunDevice.cpp |  6 +++---
 src/sysExec.cpp         | 37 ++++++++++++++++++++++++++++---------
 src/sysExec.h           |  9 ++++++++-
 src/tunDevice.h         |  2 +-
 src/win32/tunDevice.cpp |  3 ++-
 7 files changed, 47 insertions(+), 20 deletions(-)

diff --git a/src/anytun.cpp b/src/anytun.cpp
index 4fa0b25..50aa255 100644
--- a/src/anytun.cpp
+++ b/src/anytun.cpp
@@ -430,9 +430,9 @@ int main(int argc, char* argv[])
 #endif
     gResolver.init();
 #ifndef NO_EXEC
-    boost::thread(boost::bind(&TunDevice::waitForPostUpScript,&dev));
+    boost::thread(boost::bind(&TunDevice::waitUntilReady,&dev));
     if (postup_script)
-      boost::thread(boost::bind(&SysExec::waitForScript,postup_script));
+      boost::thread(boost::bind(&SysExec::waitAndDestroy,&postup_script));
 #endif   
     initCrypto();   
  
diff --git a/src/bsd/tunDevice.cpp b/src/bsd/tunDevice.cpp
index 40c3001..84fa727 100644
--- a/src/bsd/tunDevice.cpp
+++ b/src/bsd/tunDevice.cpp
@@ -275,9 +275,9 @@ void TunDevice::do_ifconfig()
 #endif
 }
 
-void TunDevice::waitForPostUpScript()
+void TunDevice::waitUntilReady()
 {
-  if (sys_exec_)
-    sys_exec_->waitForScript();
+  if(sys_exec_)
+    SysExec::waitAndDestroy(&sys_exec_);
 }
 
diff --git a/src/linux/tunDevice.cpp b/src/linux/tunDevice.cpp
index c351683..bb3e722 100644
--- a/src/linux/tunDevice.cpp
+++ b/src/linux/tunDevice.cpp
@@ -166,8 +166,8 @@ void TunDevice::do_ifconfig()
 #endif
 }
 
-void TunDevice::waitForPostUpScript()
+void TunDevice::waitUntilReady()
 {
-  if (sys_exec_)
-    sys_exec_->waitForScript();
+  if(sys_exec_)
+    SysExec::waitAndDestroy(&sys_exec_);
 }
diff --git a/src/sysExec.cpp b/src/sysExec.cpp
index 8e94c89..b6f47d8 100644
--- a/src/sysExec.cpp
+++ b/src/sysExec.cpp
@@ -48,26 +48,32 @@
 #include <string.h>
 #include <cstring>
 
-SysExec::SysExec(std::string const& script) : script_(script),closed_(false)
+SysExec::SysExec(std::string const& script) : script_(script),closed_(false),return_code_(0)
 {
   doExec(script, StringVector(), StringList());
 }
 
-SysExec::SysExec(std::string const& script, StringVector const& args) : script_(script),closed_(false)
+SysExec::SysExec(std::string const& script, StringVector const& args) : script_(script),closed_(false),return_code_(0)
 {
   doExec(script, args, StringList());
 }
 
-SysExec::SysExec(std::string const& script, StringList const& env) : script_(script),closed_(false)
+SysExec::SysExec(std::string const& script, StringList const& env) : script_(script),closed_(false),return_code_(0)
 {
   doExec( script, StringVector(), env);
 }
 
-SysExec::SysExec(std::string const& script, StringVector const& args, StringList const& env) : script_(script),closed_(false)
+SysExec::SysExec(std::string const& script, StringVector const& args, StringList const& env) : script_(script),closed_(false),return_code_(0)
 {
   doExec( script, args, env);
 }
 
+SysExec::~SysExec()
+{
+  if(!closed_)
+    close(pipefd_);
+}
+
 void SysExec::doExec(std::string const& script, StringVector const& args, StringList const& env)
 {
   int pipefd[2];
@@ -133,7 +139,7 @@ void SysExec::doExec(std::string const& script, StringVector const& args, String
   exit(-1);
 }
 
-void SysExec::waitForScript()
+int SysExec::waitForScript()
 {
   int status = 0;
   waitpid(pid_, &status, 0);
@@ -147,7 +153,7 @@ void SysExec::waitForScript()
     if(read(pipefd_, (void*)(&err), sizeof(err)) >= static_cast<int>(sizeof(err))) {
       cLog.msg(Log::PRIO_NOTICE) << "script '" << script_ << "' exec() error: " << AnytunErrno(err);
       close(pipefd_);
-      return;
+      return -1;
     }
   }
   if(WIFEXITED(status))
@@ -159,10 +165,23 @@ void SysExec::waitForScript()
 
   close(pipefd_);
 	closed_=true;
+
+  return_code_ = status;
+
+  return status;
 }
 
-SysExec::~SysExec()
+int SysExec::getReturnCode() const 
 {
-  if(!closed_)
-    close(pipefd_);
+  return return_code_;
+}
+
+void SysExec::waitAndDestroy(SysExec** s)
+{
+  if(!s && !(*s))
+    return;
+
+  (*s)->waitForScript();
+  delete(*s);
+  *s = NULL;
 }
diff --git a/src/sysExec.h b/src/sysExec.h
index d5315e4..7aada56 100644
--- a/src/sysExec.h
+++ b/src/sysExec.h
@@ -49,14 +49,21 @@ class SysExec
     SysExec(std::string const& script, StringVector const& args);
     SysExec(std::string const& script, StringList const& env);
     SysExec(std::string const& script, StringVector const& args, StringList const& env);
-    void waitForScript();
     ~SysExec();
+
+    int waitForScript();
+    int getReturnCode() const;
+
+    static void waitAndDestroy(SysExec** s);
+
   private:
 		void doExec(std::string const& script, StringVector const& args, StringList const& env);
+
     std::string script_;
     pid_t pid_;
     int pipefd_;
     bool closed_;
+    int return_code_;
 };
 
 #endif
diff --git a/src/tunDevice.h b/src/tunDevice.h
index 834837e..8b400a9 100644
--- a/src/tunDevice.h
+++ b/src/tunDevice.h
@@ -54,7 +54,7 @@ public:
   const char* getActualName() const { return actual_name_.c_str(); }
   const char* getActualNode() const { return actual_node_.c_str(); }
   device_type_t getType() const { return conf_.type_; } 
-  void waitForPostUpScript();
+  void waitUntilReady();
   const char* getTypeString() const
   {
 #ifndef _MSC_VER
diff --git a/src/win32/tunDevice.cpp b/src/win32/tunDevice.cpp
index c5b378f..6e6c83d 100644
--- a/src/win32/tunDevice.cpp
+++ b/src/win32/tunDevice.cpp
@@ -271,6 +271,7 @@ void TunDevice::do_ifconfig()
   conf_.mtu_ = static_cast<u_int16_t>(mtu);
 }
 
-void TunDevice::waitForPostUpScript()
+void TunDevice::waitUntilReady()
 {
+// nothing to be done here
 }
-- 
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