/usr/lib/python3/dist-packages/magcode/core/system_editor_pager.py is in python3-magcode-core 1.4.7-3.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 | #!/usr/bin/env python3.2
#
# Copyright (c) Net24 Limited, Christchurch, New Zealand 2011-2012
# and Voyager Internet Ltd, New Zealand, 2012-2013
#
# This file is part of py-magcode-core.
#
# Py-magcode-core 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.
#
# Py-magcode-core 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 py-magcode-core. If not, see <http://www.gnu.org/licenses/>.
#
"""
Mixin utility class for determining system pager editor
"""
import os
import os.path
import sys
import grp
import pwd
from subprocess import Popen
from subprocess import PIPE
from magcode.core.globals_ import settings
LESS_ARGS = '-REX'
class SystemEditorPager(object):
"""
Mixin class for functions to get system editor/pager
"""
def check_if_admin(self):
"""
Checks if the user has group membership that would allow full access
"""
if not hasattr(self, 'admin_mode') or self.admin_mode == None:
# Read admin_group_list and resolve it to GIDs
admin_group_list = settings['admin_group_list'].split()
admin_group_gids = []
for g in admin_group_list:
try:
admin_gid = grp.getgrnam(g).gr_gid
admin_group_gids.append(admin_gid)
except KeyError:
pass
process_gids = os.getgroups()
# Most manpages for getgroups(2) suggest you also check gid and egid
gid = os.getgid()
egid = os.getegid()
if gid and gid not in process_gids:
process_gids.append(gid)
if egid and egid not in process_gids:
process_gids.append(egid)
result = set(process_gids).intersection(admin_group_gids)
result = True if len(result) else False
result = True if os.geteuid == 0 else result
self.admin_mode = result
return self.admin_mode
def get_editor(self):
"""
Work out the users preference of editor, and return that
"""
if not self.admin_mode:
return settings['editor']
editor = os.getenvb(b'VISUAL')
if (editor):
return editor.decode()
editor = os.getenvb(b'EDITOR')
if (editor):
return editor.decode()
editor = '/usr/bin/editor'
if os.path.isfile(editor):
return editor
# Fall back if none of the above is around...
return '/usr/bin/vi'
def get_pager(self):
"""
Work out the users preference of pager and return that
"""
pager_args = settings['pager_args']
if not self.admin_mode:
pager = settings['pager']
if (os.path.realpath(pager).endswith('less')
and not pager_args):
settings['pager_args'] = LESS_ARGS
return settings['pager']
pager = os.getenvb(b'PAGER')
if (pager):
pager = pager.decode()
if pager.endswith('less') and not pager_args:
settings['pager_args'] = '-EX'
return pager
pager = '/usr/bin/pager'
if os.path.isfile(pager):
if (os.path.realpath(pager).endswith('less')
and not pager_args):
settings['pager_args'] = LESS_ARGS
return pager
# Fall backs if none of the above is around
# Try less
pager = '/usr/bin/less'
if os.path.isfile(pager):
if not pager_args:
settings['pager_args'] = LESS_ARGS
return pager
# Try more
pager = '/usr/bin/more'
if os.path.isfile(pager):
return pager
# In Debian its here...
pager = '/bin/more'
if os.path.isfile(pager):
return pager
# This is the pathological default...
return '/bin/cat'
def get_pager_args(self):
"""
Return pager args
MUST be called after get_pager
"""
pager_args = os.getenvb(b'MAGCODE_PAGER_ARGS')
# Need to be able to detect environment setting of no args ''
if (pager_args is not None):
return pager_args.decode()
return settings['pager_args']
def get_diff(self):
"""
Work out where the system's diff is
"""
diff = os.getenvb(b'MAGCODE_DIFF')
if (diff):
return diff.decode()
# Colorize diff output
diff = '/usr/bin/colordiff'
if os.path.isfile(diff):
return diff
diff = '/usr/local/bin/colordiff'
if os.path.isfile(diff):
return diff
# where binary is on FreeBSD and Linux
return '/usr/bin/diff'
def get_diff_args(self):
"""
Work out the diff args
"""
diff_args = os.getenvb(b'MAGCODE_DIFF_ARGS')
# Need to be able to detect environment setting of no args ''
if (diff_args is not None):
return diff_args.decode()
return settings['diff_args']
def get_tail(self):
"""
Find a tail binary
"""
tail = os.getenvb(b'MAGCODE_TAIL')
if (tail):
return tail.decode()
tail = '/bin/tail'
if os.path.isfile(tail):
return tail
return '/usr/bin/tail'
def get_tail_args(self):
"""
Work out the tail args
"""
tail_args = os.getenvb(b'MAGCODE_TAIL_ARGS')
# Need to be able to detect environment setting of no args ''
if (tail_args is not None):
return tail_args.decode()
return settings['tail_args']
def pager(self, text, file=sys.stdout):
"""
Page through text.
"""
if not hasattr(file, 'isatty') or not file.isatty():
print(text, file=file)
return os.EX_OK
# Make sure Less is secure
pager_env = os.environ
if not self.admin_mode:
pager_env.update({'LESSSECURE': '1'})
pager_bin = self.get_pager()
pager_args = self.get_pager_args()
pager_argv = [pager_bin]
if pager_args:
pager_argv += pager_args.split()
try:
p1 = Popen(pager_argv, stdin=PIPE, env=pager_env)
output = p1.communicate(input=text.encode())
except (IOError, OSError) as exc:
print ("Running %s failed: %s"
% (pager_bin, exc.strerror),
file=sys.stderr)
# This works with zone_tool as it is a mix in class
return os.EX_SOFTWARE
return os.EX_OK
|