lsb.py 3.7 KB

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  1. #
  2. # SPDX-License-Identifier: GPL-2.0-only
  3. #
  4. def get_os_release():
  5. """Get all key-value pairs from /etc/os-release as a dict"""
  6. from collections import OrderedDict
  7. data = OrderedDict()
  8. if os.path.exists('/etc/os-release'):
  9. with open('/etc/os-release') as f:
  10. for line in f:
  11. try:
  12. key, val = line.rstrip().split('=', 1)
  13. except ValueError:
  14. continue
  15. data[key.strip()] = val.strip('"')
  16. return data
  17. def release_dict_osr():
  18. """ Populate a dict with pertinent values from /etc/os-release """
  19. data = {}
  20. os_release = get_os_release()
  21. if 'ID' in os_release:
  22. data['DISTRIB_ID'] = os_release['ID']
  23. if 'VERSION_ID' in os_release:
  24. data['DISTRIB_RELEASE'] = os_release['VERSION_ID']
  25. return data
  26. def release_dict_lsb():
  27. """ Return the output of lsb_release -ir as a dictionary """
  28. from subprocess import PIPE
  29. try:
  30. output, err = bb.process.run(['lsb_release', '-ir'], stderr=PIPE)
  31. except bb.process.CmdError as exc:
  32. return {}
  33. lsb_map = { 'Distributor ID': 'DISTRIB_ID',
  34. 'Release': 'DISTRIB_RELEASE'}
  35. lsb_keys = lsb_map.keys()
  36. data = {}
  37. for line in output.splitlines():
  38. if line.startswith("-e"):
  39. line = line[3:]
  40. try:
  41. key, value = line.split(":\t", 1)
  42. except ValueError:
  43. continue
  44. if key in lsb_keys:
  45. data[lsb_map[key]] = value
  46. if len(data.keys()) != 2:
  47. return None
  48. return data
  49. def release_dict_file():
  50. """ Try to gather release information manually when other methods fail """
  51. data = {}
  52. try:
  53. if os.path.exists('/etc/lsb-release'):
  54. data = {}
  55. with open('/etc/lsb-release') as f:
  56. for line in f:
  57. key, value = line.split("=", 1)
  58. data[key] = value.strip()
  59. elif os.path.exists('/etc/redhat-release'):
  60. data = {}
  61. with open('/etc/redhat-release') as f:
  62. distro = f.readline().strip()
  63. import re
  64. match = re.match(r'(.*) release (.*) \((.*)\)', distro)
  65. if match:
  66. data['DISTRIB_ID'] = match.group(1)
  67. data['DISTRIB_RELEASE'] = match.group(2)
  68. elif os.path.exists('/etc/SuSE-release'):
  69. data = {}
  70. data['DISTRIB_ID'] = 'SUSE LINUX'
  71. with open('/etc/SuSE-release') as f:
  72. for line in f:
  73. if line.startswith('VERSION = '):
  74. data['DISTRIB_RELEASE'] = line[10:].rstrip()
  75. break
  76. except IOError:
  77. return {}
  78. return data
  79. def distro_identifier(adjust_hook=None):
  80. """Return a distro identifier string based upon lsb_release -ri,
  81. with optional adjustment via a hook"""
  82. import re
  83. # Try /etc/os-release first, then the output of `lsb_release -ir` and
  84. # finally fall back on parsing various release files in order to determine
  85. # host distro name and version.
  86. distro_data = release_dict_osr()
  87. if not distro_data:
  88. distro_data = release_dict_lsb()
  89. if not distro_data:
  90. distro_data = release_dict_file()
  91. distro_id = distro_data.get('DISTRIB_ID', '')
  92. release = distro_data.get('DISTRIB_RELEASE', '')
  93. if adjust_hook:
  94. distro_id, release = adjust_hook(distro_id, release)
  95. if not distro_id:
  96. return "Unknown"
  97. # Filter out any non-alphanumerics
  98. distro_id = re.sub(r'\W', '', distro_id)
  99. if release:
  100. id_str = '{0}-{1}'.format(distro_id.lower(), release)
  101. else:
  102. id_str = distro_id
  103. return id_str.replace(' ','-').replace('/','-')