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| author | Eric Desrochers <eric.desrochers@canonical.com> | 2019-08-30 13:26:41 -0400 |
|---|---|---|
| committer | Bryn M. Reeves <bmr@redhat.com> | 2019-10-01 15:08:59 +0100 |
| commit | a08196b8c02924a47271d6d31660b1ad528f09dd (patch) | |
| tree | ba1e1e8834ae13862485e5c34857907a119a7b64 | |
| parent | 7d56ce2fbc140024001013bbc2309295cab3331d (diff) | |
| download | sos-a08196b8c02924a47271d6d31660b1ad528f09dd.tar.gz | |
[last] split lastlog per UID ranges
lastlog by default reports all users regardless of their UID
and doesn't give any hints about UID.
In some context, such as users obfuscation inside SOSCleaner, it is
useful to know which users are part of which UID range so that we
can then decide if this need to be obfuscated or not.
Splitting the file by UID range will highly benefit SOSCleaner
but I'm sure it could benefit other purposes as well.
Reserves for dynamically allocated system users and groups.
"lastlog -u 0-999"
Min/max values for automatic uid selection in useradd.
"lastlog -u 1000-60000",
Centrally and statically allocates users and groups.
"lastlog -u 60001-65536"
Further reservations.
"lastlog -u 65537-4294967295"
https://en.wikipedia.org/wiki/User_identifier
"The majority of modern Unix-like systems (e.g., Solaris-2.0 in 1990,
Linux 2.4 in 2001) have switched to 32-bit UIDs, allowing 4,294,967,296
(232) unique IDs."
Closes: #1743
Resolves: #1770
Signed-off-by: Eric Desrochers <eric.desrochers@canonical.com>
Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
| -rw-r--r-- | sos/plugins/last.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sos/plugins/last.py b/sos/plugins/last.py index 4da3f5cf..57462b93 100644 --- a/sos/plugins/last.py +++ b/sos/plugins/last.py @@ -21,7 +21,11 @@ class Last(Plugin, RedHatPlugin, DebianPlugin, UbuntuPlugin): self.add_cmd_output([ "last reboot", "last shutdown", - "lastlog" + "lastlog", + "lastlog -u 0-999", + "lastlog -u 1000-60000", + "lastlog -u 60001-65536", + "lastlog -u 65537-4294967295" ]) # vim: et ts=4 sw=4 |