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author | Matthias Schiffer <matthias@gamezock.de> | 2008-11-26 22:23:22 +0100 |
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committer | Matthias Schiffer <matthias@gamezock.de> | 2008-11-26 22:23:22 +0100 |
commit | e0de95864892d1e119f91936d8b1294542ab2316 (patch) | |
tree | bea739950464d5dad5bcfe65db456995aec6b6c1 /src/Common/Backends/SystemBackendPosix.cpp | |
parent | 9dd79833cf7db552f9098e90fe188bbf41d9094a (diff) | |
download | mad-e0de95864892d1e119f91936d8b1294542ab2316.tar mad-e0de95864892d1e119f91936d8b1294542ab2316.zip |
SystemBackendPosix ist jetzt ein Modul
Diffstat (limited to 'src/Common/Backends/SystemBackendPosix.cpp')
-rw-r--r-- | src/Common/Backends/SystemBackendPosix.cpp | 284 |
1 files changed, 0 insertions, 284 deletions
diff --git a/src/Common/Backends/SystemBackendPosix.cpp b/src/Common/Backends/SystemBackendPosix.cpp deleted file mode 100644 index bff72db..0000000 --- a/src/Common/Backends/SystemBackendPosix.cpp +++ /dev/null @@ -1,284 +0,0 @@ -/* - * SystemBackendPosix.cpp - * - * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de> - * - * This program is free software: you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "SystemBackendPosix.h" -#include <Net/FdManager.h> - -#include <cstdio> -#include <cstdlib> -#include <cstring> -#include <sstream> - -#include <fcntl.h> -#include <signal.h> -#include <spawn.h> -#include <sys/wait.h> -#include <unistd.h> - -#include <sigc++/bind.h> - -namespace Mad { -namespace Common { -namespace Backends { - -SystemBackendPosix SystemBackendPosix::backend; - -std::map<pid_t, sigc::slot<void, int> > SystemBackendPosix::processes; -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() { - struct sigaction action; - - action.sa_handler = childHandler; - sigemptyset(&action.sa_mask); - action.sa_flags = 0; - - sigaction(SIGCHLD, &action, 0); -} - -SystemBackendPosix::~SystemBackendPosix() { - struct sigaction action; - - action.sa_handler = SIG_DFL; - sigemptyset(&action.sa_mask); - action.sa_flags = 0; - - sigaction(SIGCHLD, &action, 0); -} - - -void SystemBackendPosix::fsInfoCallback(int, const std::string &output, const sigc::slot<void, const std::vector<FSInfo>& > &callback) { - std::vector<FSInfo> ret; - std::istringstream stream(output); - std::string str; - - std::getline(stream, str); // ignore first line - - while(!stream.eof()) { - std::getline(stream, str); - - char *fsName = new char[str.length()+1]; - char *mountedOn = new char[str.length()+1]; - - FSInfo info; - - if(std::sscanf(str.c_str(), "%s %lld %lld %lld %*d%% %s", fsName, &info.total, &info.used, &info.available, mountedOn) == 5) { - info.fsName = fsName; - info.mountedOn = mountedOn; - - ret.push_back(info); - } - - delete [] fsName; - delete [] mountedOn; - } - - callback(ret); -} - -bool SystemBackendPosix::fsInfo(const sigc::slot<void, const std::vector<FSInfo>& > &callback) { - std::vector<std::string> argv; - - argv.push_back("/bin/df"); - argv.push_back("-P"); - argv.push_back("-k"); - - return execWithOutput(sigc::bind(sigc::mem_fun(this, &SystemBackendPosix::fsInfoCallback), callback), "/bin/df", argv); -} - - -void SystemBackendPosix::childHandler(int) { - int status; - pid_t pid; - - // TODO Don't call callbacks directly - - while((pid = waitpid(-1, &status, WNOHANG)) > 0) { - std::map<pid_t, sigc::slot<void, int> >::iterator it = processes.find(pid); - - if(it != processes.end()) { - it->second(status); - processes.erase(it); - } - else { - 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 = processesWOOutput[pid]; - int handle = processesWOHandles[pid]; - - while((n = read(handle, buffer, sizeof(buffer))) > 0) - output += std::string(buffer, n); - - Net::FdManager::get()->unregisterFd(handle); - close(handle); - - it2->second(status, output); - processesWithOutput.erase(it2); - processesWOHandles.erase(pid); - processesWOOutput.erase(pid); - } - } - } - - 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; - - if(argv.empty()) { - argvp = new char*[2]; - - argvp[0] = strdup(filename.c_str()); - argvp[1] = 0; - } - else { - argvp = new char*[argv.size() + 1]; - - for(size_t s = 0; s < argv.size(); ++s) { - argvp[s] = strdup(argv[s].c_str()); - } - - argvp[argv.size()] = 0; - } - - if(env.empty()) { - envp = environ; - } - else { - envp = new char*[env.size() + 1]; - - for(size_t s = 0; s < env.size(); ++s) { - envp[0] = strdup(env[s].c_str()); - } - - envp[env.size()] = 0; - } - - return std::make_pair(argvp, envp); -} - -void SystemBackendPosix::destroyArgs(std::pair<char**, char**> args) { - for(char **p = args.first; *p != 0; ++p) - std::free(*p); - - delete [] args.first; - - if(args.second != environ) { - for(char **p = args.second; *p != 0; ++p) - std::free(*p); - - delete [] args.second; - } -} - -bool SystemBackendPosix::exec(const sigc::slot<void, int> &resultHandler, const std::string &filename, const std::vector<std::string> &argv, const std::vector<std::string> &env) { - pid_t pid; - std::pair<char**, char**> args = makeArgs(filename, argv, env); - - sigset_t set, oldset; - sigemptyset(&set); - sigaddset(&set, SIGCHLD); - sigprocmask(SIG_BLOCK, &set, &oldset); - - bool ret = (posix_spawnp(&pid, filename.c_str(), 0, 0, args.first, args.second) == 0); - - if(ret) - processes.insert(std::make_pair(pid, resultHandler)); - - sigprocmask(SIG_SETMASK, &oldset, 0); - - destroyArgs(args); - - return ret; -} - -bool SystemBackendPosix::execWithOutput(const sigc::slot<void, int, const std::string&> &resultHandler, const std::string &filename, const std::vector<std::string> &argv, const std::vector<std::string> &env) { - pid_t pid; - std::pair<char**, char**> args = makeArgs(filename, argv, env); - - int saveStdout = dup(STDOUT_FILENO); - int pipeHandles[2]; - - 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); - sigprocmask(SIG_BLOCK, &set, &oldset); - - 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); - - 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())); - - Net::FdManager::get()->registerFd(pipeHandles[0], sigc::bind(sigc::ptr_fun(&SystemBackendPosix::outputHandler), pid), POLLIN); - } - - dup2(saveStdout, STDOUT_FILENO); // restore old stdout - close(saveStdout); - - sigprocmask(SIG_SETMASK, &oldset, 0); - - destroyArgs(args); - - return ret; -} - -} -} -} |