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-rw-r--r--meta/lib/rootfspostcommands.py90
1 files changed, 0 insertions, 90 deletions
diff --git a/meta/lib/rootfspostcommands.py b/meta/lib/rootfspostcommands.py
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1#
2# Copyright OpenEmbedded Contributors
3#
4# SPDX-License-Identifier: GPL-2.0-only
5#
6
7import os
8
9def sort_shadowutils_file(filename, mapping):
10 """
11 Sorts a passwd or group file based on the numeric ID in the third column.
12 If a mapping is given, the name from the first column is mapped via that
13 dictionary instead (necessary for /etc/shadow and /etc/gshadow). If not,
14 a new mapping is created on the fly and returned.
15 """
16
17 new_mapping = {}
18 with open(filename, 'rb+') as f:
19 lines = f.readlines()
20 # No explicit error checking for the sake of simplicity. /etc
21 # files are assumed to be well-formed, causing exceptions if
22 # not.
23 for line in lines:
24 entries = line.split(b':')
25 name = entries[0]
26 if mapping is None:
27 id = int(entries[2])
28 else:
29 id = mapping[name]
30 new_mapping[name] = id
31 # Sort by numeric id first, with entire line as secondary key
32 # (just in case that there is more than one entry for the same id).
33 lines.sort(key=lambda line: (new_mapping[line.split(b':')[0]], line))
34 # We overwrite the entire file, i.e. no truncate() necessary.
35 f.seek(0)
36 f.write(b''.join(lines))
37
38 return new_mapping
39
40def sort_shadowutils_files(sysconfdir):
41 """
42 Sorts shadow-utils 'passwd' and 'group' files in a rootfs' /etc directory
43 by ID.
44 """
45
46 for main, shadow in (('passwd', 'shadow'),
47 ('group', 'gshadow')):
48 filename = os.path.join(sysconfdir, main)
49 if os.path.exists(filename):
50 mapping = sort_shadowutils_file(filename, None)
51 filename = os.path.join(sysconfdir, shadow)
52 if os.path.exists(filename):
53 sort_shadowutils_file(filename, mapping)
54
55def remove_shadowutils_backup_file(filename):
56 """
57 Remove shadow-utils backup file for files like /etc/passwd.
58 """
59
60 backup_filename = filename + '-'
61 if os.path.exists(backup_filename):
62 os.unlink(backup_filename)
63
64def remove_shadowutils_backup_files(sysconfdir):
65 """
66 Remove shadow-utils backup files in a rootfs /etc directory. They are not
67 needed in the initial root filesystem and sorting them can be inconsistent
68 (YOCTO #11043).
69 """
70
71 for filename in (
72 'group',
73 'gshadow',
74 'passwd',
75 'shadow',
76 'subgid',
77 'subuid',
78 ):
79 filepath = os.path.join(sysconfdir, filename)
80 remove_shadowutils_backup_file(filepath)
81
82def tidy_shadowutils_files(sysconfdir):
83 """
84 Tidy up shadow-utils files.
85 """
86
87 remove_shadowutils_backup_files(sysconfdir)
88 sort_shadowutils_files(sysconfdir)
89
90 return True