From fa0a978ae129f0f04b9d336e9a3d71489fe519e8 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Sat, 11 Oct 2008 22:32:32 +0200
Subject: Benutzte den FdManager f?r Ausgaben von Programmen im Posix-Backend

---
 src/Common/Backends/SystemBackendPosix.cpp | 57 ++++++++++++++++++++++++------
 src/Common/Backends/SystemBackendPosix.h   |  7 +++-
 2 files changed, 53 insertions(+), 11 deletions(-)

(limited to 'src/Common/Backends')

diff --git a/src/Common/Backends/SystemBackendPosix.cpp b/src/Common/Backends/SystemBackendPosix.cpp
index 267e82e..62067c2 100644
--- a/src/Common/Backends/SystemBackendPosix.cpp
+++ b/src/Common/Backends/SystemBackendPosix.cpp
@@ -18,6 +18,7 @@
  */
 
 #include "SystemBackendPosix.h"
+#include <Net/FdManager.h>
 
 #include <cstdio>
 #include <cstdlib>
@@ -39,7 +40,9 @@ namespace Backends {
 SystemBackendPosix SystemBackendPosix::backend;
 
 std::map<pid_t, sigc::slot<void, int> > SystemBackendPosix::processes;
-std::map<pid_t, std::pair<sigc::slot<void, int, const std::string&>, int> > SystemBackendPosix::processesWithOutput;
+std::map<pid_t, sigc::slot<void, int, const std::string&> > SystemBackendPosix::processesWithOutput;
+std::map<pid_t, int> SystemBackendPosix::processesWOHandles;
+std::map<pid_t, std::string > SystemBackendPosix::processesWOOutput;
 
 
 void SystemBackendPosix::setChildHandler() {
@@ -117,20 +120,24 @@ void SystemBackendPosix::childHandler(int) {
       processes.erase(it);
     }
     else {
-      std::map<pid_t, std::pair<sigc::slot<void, int, const std::string&>, int> >::iterator it2 = processesWithOutput.find(pid);
+      std::map<pid_t, sigc::slot<void, int, const std::string&> >::iterator it2 = processesWithOutput.find(pid);
 
       if(it2 != processesWithOutput.end()) {
         char buffer[1024];
         ssize_t n;
-        std::string output;
+        std::string &output = processesWOOutput[pid];
+        int handle = processesWOHandles[pid];
 
-        while((n = read(it2->second.second, buffer, sizeof(buffer))) > 0)
+        while((n = read(handle, buffer, sizeof(buffer))) > 0)
           output += std::string(buffer, n);
 
-        close(it2->second.second);
+        Net::FdManager::getFdManager()->unregisterFd(handle);
+        close(handle);
 
-        it2->second.first(status, output);
+        it2->second(status, output);
         processesWithOutput.erase(it2);
+        processesWOHandles.erase(pid);
+        processesWOOutput.erase(pid);
       }
     }
   }
@@ -138,6 +145,28 @@ void SystemBackendPosix::childHandler(int) {
   setChildHandler();
 }
 
+void SystemBackendPosix::outputHandler(short events, pid_t pid) {
+  char buf[1024];
+
+  if(events & POLLIN) {
+    sigset_t set, oldset;
+    sigemptyset(&set);
+    sigaddset(&set, SIGCHLD);
+    sigprocmask(SIG_BLOCK, &set, &oldset);
+
+    ssize_t ret;
+
+    std::map<pid_t, int>::iterator handle = processesWOHandles.find(pid);
+    if(handle == processesWOHandles.end())
+      return;
+
+    while((ret = read(handle->second, buf, sizeof(buf))) > 0)
+      processesWOOutput[pid] += std::string(buf, ret);
+
+    sigprocmask(SIG_SETMASK, &oldset, 0);
+  }
+}
+
 std::pair<char**, char**> SystemBackendPosix::makeArgs(const std::string &filename, const std::vector<std::string> &argv, const std::vector<std::string> &env) {
   char **argvp, **envp;
 
@@ -215,10 +244,13 @@ bool SystemBackendPosix::execWithOutput(const sigc::slot<void, int, const std::s
   int saveStdout = dup(STDOUT_FILENO);
   int pipeHandles[2];
 
-  pipe(pipeHandles); // TODO Better pipe handling
+  pipe(pipeHandles);
 
   fcntl(pipeHandles[0], F_SETFD, FD_CLOEXEC);
 
+  int flags = fcntl(pipeHandles[0], F_GETFL, 0);
+  fcntl(pipeHandles[0], F_SETFL, flags | O_NONBLOCK);
+
   sigset_t set, oldset;
   sigemptyset(&set);
   sigaddset(&set, SIGCHLD);
@@ -227,10 +259,15 @@ bool SystemBackendPosix::execWithOutput(const sigc::slot<void, int, const std::s
   dup2(pipeHandles[1], STDOUT_FILENO); // set the new pipe as stdout
   close(pipeHandles[1]);
 
-  bool ret (posix_spawnp(&pid, filename.c_str(), 0, 0, args.first, args.second) == 0);
+  bool ret = (posix_spawnp(&pid, filename.c_str(), 0, 0, args.first, args.second) == 0);
+
+  if(ret) {
+    processesWithOutput.insert(std::make_pair(pid, resultHandler));
+    processesWOHandles.insert(std::make_pair(pid, pipeHandles[0]));
+    processesWOOutput.insert(std::make_pair(pid, std::string()));
 
-  if(ret)
-    processesWithOutput.insert(std::make_pair(pid, std::make_pair(resultHandler, pipeHandles[0])));
+    Net::FdManager::getFdManager()->registerFd(pipeHandles[0], sigc::bind(sigc::ptr_fun(&SystemBackendPosix::outputHandler), pid), POLLIN);
+  }
 
   dup2(saveStdout, STDOUT_FILENO); // restore old stdout
   close(saveStdout);
diff --git a/src/Common/Backends/SystemBackendPosix.h b/src/Common/Backends/SystemBackendPosix.h
index b7f364a..59dd2d8 100644
--- a/src/Common/Backends/SystemBackendPosix.h
+++ b/src/Common/Backends/SystemBackendPosix.h
@@ -38,12 +38,17 @@ class SystemBackendPosix : public SystemBackend {
   private:
     static SystemBackendPosix backend;
     static std::map<pid_t, sigc::slot<void, int> > processes;
-    static std::map<pid_t, std::pair<sigc::slot<void, int, const std::string&>, int> > processesWithOutput;
+
+    static std::map<pid_t, sigc::slot<void, int, const std::string&> > processesWithOutput;
+    static std::map<pid_t, int> processesWOHandles;
+    static std::map<pid_t, std::string > processesWOOutput;
 
     static void setChildHandler();
 
     static void childHandler(int);
 
+    static void outputHandler(short events, pid_t pid);
+
     static std::pair<char**, char**> makeArgs(const std::string &filename, const std::vector<std::string> &argv, const std::vector<std::string> &env);
     static void destroyArgs(std::pair<char**, char**> args);
 
-- 
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