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#include "Spooler.h" |
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#include <iostream> |
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#include <string> |
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#include <stdexcept> |
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#include <cstring> |
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#include <fstream> |
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#include <sstream> |
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#include <iomanip> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/file.h> |
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#include <dirent.h> |
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#include <fcntl.h> |
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#include <stdlib.h> |
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#include "Util.h" |
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#include "Exceptions.h" |
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const std::string spooldir = "/var/spool/smsdaemon/"; |
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using namespace std; |
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void errnoException(std::string msg = "") |
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{ |
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if (msg != "") |
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msg += ": "; |
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msg += std::string(strerror(errno)); |
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throw std::runtime_error(msg); |
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} |
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void Spooler::enqueue(std::string recipient, std::string message) |
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{ |
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bool error = false; |
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lock(); |
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std::string file = findSpoolFilename(); |
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std::ofstream out(file.c_str()); |
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if (out) |
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{ |
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out << recipient << "\n" << message; |
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out.close(); |
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} |
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else |
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{ |
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error = true; |
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} |
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unlock(); |
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if (error) |
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throw std::runtime_error("Could not create spoolfile"); |
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this->filename = file; |
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} |
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std::string Spooler::dequeue() |
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{ |
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lock(); |
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DIR* dir = opendir( spooldir.c_str() ); |
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if (dir == 0) |
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errnoException(); |
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string file; |
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string message; |
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dirent* entry; |
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while ( (entry = readdir(dir)) != 0) |
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{ |
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if (entry->d_name[0] == '.' ) |
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{ |
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continue; |
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} |
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else |
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{ |
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file = spooldir + string(entry->d_name); |
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break; |
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} |
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} |
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closedir(dir); |
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if (file != "") |
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{ |
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message = Util::readfile(file); |
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::unlink(file.c_str()); |
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} |
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unlock(); |
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this->filename = file; |
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if (file != "") |
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return message; |
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else |
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throw filenotfoundexception(); |
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} |
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std::string Spooler::findSpoolFilename() |
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{ |
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std::string file; |
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std::stringstream ss; |
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int retrycount = 0; |
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while (1) |
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{ |
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ss.str(std::string()); //clear |
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ss << std::setw(8) << std::setfill('0') << std::uppercase << std::hex << rand(); |
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string file = spooldir; |
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file += ss.str().c_str(); |
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int fd = ::open(file.c_str(), O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH); |
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retrycount ++; |
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if (fd != -1) |
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{ |
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::close(fd); |
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return file; |
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} |
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int err = errno; |
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::close(fd); |
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if (err == EEXIST) |
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{ |
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continue; |
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} |
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if (retrycount > 20) |
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throw std::runtime_error("to many retry attempt at creating spool file"); |
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throw std::runtime_error("no access to spool directory"); |
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} |
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} |
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void Spooler::lock() |
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{ |
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lockfd = open(spooldir.c_str() , O_RDONLY); |
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if (lockfd == -1) |
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{ |
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errnoException("Couldn open lockfile"); |
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} |
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int status = flock(lockfd, LOCK_EX); |
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if (status == -1) |
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{ |
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errnoException(); |
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} |
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} |
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void Spooler::unlock() |
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{ |
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flock(lockfd, LOCK_UN); |
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close(lockfd); |
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} |
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string Spooler::getFilename() |
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{ |
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return filename; |
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} |