logfile.cc 2.7 KB

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  1. /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
  2. *
  3. * DataDifferential Utility Library
  4. *
  5. * Copyright (C) 2011 Data Differential, http://datadifferential.com/
  6. * All rights reserved.
  7. *
  8. * Redistribution and use in source and binary forms, with or without
  9. * modification, are permitted provided that the following conditions are
  10. * met:
  11. *
  12. * * Redistributions of source code must retain the above copyright
  13. * notice, this list of conditions and the following disclaimer.
  14. *
  15. * * Redistributions in binary form must reproduce the above
  16. * copyright notice, this list of conditions and the following disclaimer
  17. * in the documentation and/or other materials provided with the
  18. * distribution.
  19. *
  20. * * The names of its contributors may not be used to endorse or
  21. * promote products derived from this software without specific prior
  22. * written permission.
  23. *
  24. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35. *
  36. */
  37. #include "gear_config.h"
  38. #include "util/logfile.hpp"
  39. #include <cerrno>
  40. #include <cstdio>
  41. #include <cstdlib>
  42. #include <cstring>
  43. #include <fcntl.h>
  44. #include <fstream>
  45. #include <iostream>
  46. #include <sstream>
  47. #include <sys/stat.h>
  48. #include <sys/types.h>
  49. #include <unistd.h>
  50. namespace datadifferential {
  51. namespace util {
  52. Logfile::Logfile(const std::string &arg) :
  53. _filename(arg)
  54. {
  55. time_t tmp= time(NULL);
  56. _log_file << "shutdown: " << ctime(&tmp) << std::endl;
  57. }
  58. Logfile::~Logfile()
  59. {
  60. if (not _filename.empty())
  61. {
  62. _log_file.close();
  63. if (access(_filename.c_str(), F_OK) == -1)
  64. { }
  65. else if (unlink(_filename.c_str()) == -1)
  66. { }
  67. }
  68. }
  69. bool Logfile::open()
  70. {
  71. if (_filename.empty())
  72. {
  73. _log_file.open("/dev/stderr");
  74. return true;
  75. }
  76. _log_file.open(_filename.c_str());
  77. if (not _log_file.good())
  78. {
  79. return false;
  80. }
  81. time_t tmp= time(NULL);
  82. _log_file << "startup: " << ctime(&tmp) << std::endl;
  83. return true;
  84. }
  85. } /* namespace util */
  86. } /* namespace datadifferential */