/usr/lib/lsb/initdutils.py is in lsb-compat 9.20161125.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | # Support for scanning init scripts for LSB info
from __future__ import print_function
import re, sys, os
import pickle
from io import StringIO
class RFC822Parser(dict):
"A dictionary-like object."
__linere = re.compile(r'([^:]+):\s*(.*)$')
def __init__(self, fileob=None, strob=None, startcol=0, basedict=None):
if fileob is None and strob is None:
raise ValueError('need a file or string')
if not basedict:
basedict = {}
super(RFC822Parser, self).__init__(basedict)
if not fileob:
fileob = StringIO(strob)
key = None
for line in fileob:
if startcol:
line = line[startcol:]
if not line.strip():
continue
# Continuation line
if line[0].isspace():
if not key:
continue
self[key] += '\n' + line.strip()
continue
m = self.__linere.match(line)
if not m:
# Not a valid RFC822 header
continue
key, value = m.groups()
self[key] = value.strip()
# End of RFC882Parser
LSBLIB = '/var/lib/lsb'
FACILITIES = os.path.join(LSBLIB, 'facilities')
DEPENDS = os.path.join(LSBLIB, 'depends')
LSBINSTALL = os.path.join(LSBLIB, 'lsbinstall')
beginre = re.compile(re.escape('### BEGIN INIT INFO'))
endre = re.compile(re.escape('### END INIT INFO'))
#linere = re.compile(r'\#\s+([^:]+):\s*(.*)')
def scan_initfile(initfile):
headerlines = ''
scanning = False
for line in open(initfile):
line = line.rstrip()
if beginre.match(line):
scanning = True
continue
elif scanning and endre.match(line):
scanning = False
continue
elif not scanning:
continue
if line.startswith('# '):
headerlines += line[2:] + '\n'
elif line.startswith('#\t'):
headerlines += line[1:] + '\n'
inheaders = RFC822Parser(strob=headerlines)
headers = {}
for header, body in inheaders.items():
# Ignore empty headers
if not body.strip():
continue
if header in ('Default-Start', 'Default-Stop'):
headers[header] = list(map(int, body.split()))
elif header in ('Required-Start', 'Required-Stop', 'Provides',
'Should-Start', 'Should-Stop'):
headers[header] = body.split()
else:
headers[header] = body
return headers
def save_facilities(facilities):
if not facilities:
try:
os.unlink(FACILITIES)
except OSError:
pass
return
fh = open(FACILITIES, 'w')
for facility, entries in facilities.items():
# Ignore system facilities
if facility.startswith('$'): continue
for (scriptname, pri) in entries.items():
start, stop = pri
print("%(scriptname)s %(facility)s %(start)d %(stop)d" % locals(), file=fh)
fh.close()
def load_facilities():
facilities = {}
if os.path.exists(FACILITIES):
for line in open(FACILITIES):
try:
scriptname, name, start, stop = line.strip().split()
facilities.setdefault(name, {})[scriptname] = (int(start),
int(stop))
except ValueError as x:
print('Invalid facility line', line, file=sys.stderr)
return facilities
def load_depends():
depends = {}
if os.path.exists(DEPENDS):
independs = RFC822Parser(fileob=open(DEPENDS))
for initfile, facilities in independs.items():
depends[initfile] = facilities.split()
return depends
def save_depends(depends):
if not depends:
try:
os.unlink(DEPENDS)
except OSError:
pass
return
fh = open(DEPENDS, 'w')
for initfile, facilities in depends.items():
print('%s: %s' % (initfile, ' '.join(facilities)), file=fh)
fh.close()
# filemap entries are mappings, { (package, filename) : instloc }
def load_lsbinstall_info():
if not os.path.exists(LSBINSTALL):
return {}
fh = open(LSBINSTALL, 'rb')
filemap = cPickle.load(fh)
fh.close()
# Just in case it's corrupted somehow
if not isinstance(filemap, dict):
return {}
return filemap
def save_lsbinstall_info(filemap):
if not filemap:
try:
os.unlink(LSBINSTALL)
except OSError:
pass
return
fh = open(LSBINSTALL, 'wb')
cPickle.dump(fh, filemap)
fh.close()
if __name__ == '__main__':
print(scan_initfile('init-fragment'))
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