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Various things don't work when we're running in a user namespace, but it's
pretty hard to reliably detect if that is true.
A function is added which looks at /proc/self/uid_map and returns false
if the default "0 0 UINT32_MAX" is found, and true if it finds anything else.
This misses the case where an 1:1 mapping with the full range was used, but
I don't know how to distinguish this case.
'systemd-detect-virt --private-users' is very similar to
'systemd-detect-virt --chroot', but we check for a user namespace instead.
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Fixes:
```
==28075== 64 bytes in 1 blocks are definitely lost in loss record 2 of 3
==28075== at 0x4C2BAEE: malloc (vg_replace_malloc.c:298)
==28075== by 0x4C2DCA1: realloc (vg_replace_malloc.c:785)
==28075== by 0x4ED40A2: greedy_realloc (alloc-util.c:57)
==28075== by 0x4E90F87: extract_first_word (extract-word.c:78)
==28075== by 0x4E91813: extract_many_words (extract-word.c:270)
==28075== by 0x10FE93: parse_line (sysusers.c:1325)
==28075== by 0x11198B: read_config_file (sysusers.c:1640)
==28075== by 0x111EB8: main (sysusers.c:1773)
==28075==
```
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Fixes: #4431
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Fixes:
```
==10750==
==10750== HEAP SUMMARY:
==10750== in use at exit: 96 bytes in 3 blocks
==10750== total heap usage: 1,711 allocs, 1,708 frees, 854,545 bytes
allocated
==10750==
==10750== 96 (64 direct, 32 indirect) bytes in 1 blocks are definitely
lost in loss record 3 of 3
==10750== at 0x4C2DA60: calloc (vg_replace_malloc.c:711)
==10750== by 0x4EB3BDA: calendar_spec_from_string
(calendarspec.c:771)
==10750== by 0x109675: test_hourly_bug_4031 (test-calendarspec.c:118)
==10750== by 0x10A00E: main (test-calendarspec.c:202)
==10750==
==10750== LEAK SUMMARY:
==10750== definitely lost: 64 bytes in 1 blocks
==10750== indirectly lost: 32 bytes in 2 blocks
==10750== possibly lost: 0 bytes in 0 blocks
==10750== still reachable: 0 bytes in 0 blocks
==10750== suppressed: 0 bytes in 0 blocks
==10750==
==10750== For counts of detected and suppressed errors, rerun with: -v
==10750== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
```
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Just to make sure the next one reading this isn't surprised that the fd isn't
kept open. SAK and stuff...
Fix suggested:
https://github.com/systemd/systemd/pull/4366#issuecomment-253659162
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Two unrelated patches: man page tweaks and rlimit log levels
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Since we ignore the result anyway, downgrade errors to warning.
log_oom() will still emit an error, but that's mostly theoretical, so it
is not worth complicating the code to avoid the small inconsistency
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As suggested in
https://github.com/systemd/systemd/pull/4367#issuecomment-253670328
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Journald fix flush when restarting (#4190)
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Various install-related tweaks
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This is a follow-up for 9ee051b9c7623
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Now that determine_space_for() only deals with storage space (cached) values,
rename it so it reflects the fact that only the cached storage space values are
updated.
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Updating min_use is rather an unusual operation that is limited when we first
open the journal files, therefore extracts it from determine_space_for() and
create a function of its own and call this new function when needed.
determine_space_for() is now dealing with storage space (cached) values only.
There should be no functional changes.
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Introduce a dedicated helper in order to reset the storage space cache.
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The set of storage space values we cache are calculated according to a couple
of filesystem statistics (free blocks, block size).
This patch caches the vfs stats we're interested in so these values are
available later and coherent with the rest of the space cached values.
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This patch makes system_journal_open() stop emitting the space usage
message. The caller is now free to emit this message when appropriate.
When restarting the journal, we can now emit the message *after*
flushing the journal (if required) so that all flushed log entries are
written in the persistent journal *before* the status message.
This is required since the status message is always younger than the
flushed entries.
Fixes #4190.
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This commit simply extracts from determine_space_for() the code which emits the
storage usage message and put it into a function of its own so it can be reused
by others paths later.
No functional changes.
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This structure keeps track of specificities for a given journal type
(persistent or volatile) such as metrics, name, etc...
The cached space values are now moved in this structure so that each
journal has its own set of cached values.
Previously only one set existed and we didn't know if the cached
values were for the runtime journal or the persistent one.
When doing:
determine_space_for(s, runtime_metrics, ...);
determine_space_for(s, system_metrics, ...);
the second call returned the cached values for the runtime metrics.
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This commit simply extracts from determine_space_for() the code which
determines the FS usage where the passed path lives (statvfs(3)) and put it
into a function of its own so it can be reused by others paths later.
No functional changes.
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When a unit file is invalid, we'd return an error without any details:
$ systemctl --root=/ enable testing@instance.service
Failed to enable: Invalid argument.
Fix things to at least print the offending file name:
$ systemctl enable testing@instance.service
Failed to enable unit: File testing@instance.service: Invalid argument
$ systemctl --root=/ enable testing@instance.service
Failed to enable unit, file testing@instance.service: Invalid argument.
A real fix would be to pass back a proper error message from conf-parser.
But this would require major surgery, since conf-parser functions now
simply print log errors, but we would need to return them over the bus.
So let's just print the file name, to indicate where the error is.
(Incomplete) fix for #4210.
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Test case:
[Install]
WantedBy= default.target
Also=getty@%p.service
$ ./systemctl --root=/ enable testing@instance.service
Created symlink /etc/systemd/system/default.target.wants/testing@instance.service → /etc/systemd/system/testing@.service.
Created symlink /etc/systemd/system/getty.target.wants/getty@testing.service → /usr/lib/systemd/system/getty@.service.
$ ./systemctl --root=/ disable testing@instance.service
Removed /etc/systemd/system/getty.target.wants/getty@testing.service.
Removed /etc/systemd/system/default.target.wants/testing@instance.service.
Fixes part of #4210.
Resolving specifiers in DefaultInstance seems to work too:
[Install]
WantedBy= default.target
DefaultInstance=%u
$ systemctl --root=/ enable testing3@instance.service
Created symlink /etc/systemd/system/default.target.wants/testing3@instance.service → /etc/systemd/system/testing3@.service.
$ systemctl --root=/ enable testing3@.service
Created symlink /etc/systemd/system/default.target.wants/testing3@zbyszek.service → /etc/systemd/system/testing3@.service.
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Test case:
[Install]
WantedBy= default.target
Also=foobar-unknown.service
Before:
$ systemctl --root=/ enable testing2@instance.service
Failed to enable: No such file or directory.
After
$ ./systemctl --root=/ enable testing2@instance.service
Failed to enable unit, file foobar-unknown.service: No such file or directory.
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With the following test case:
[Install]
WantedBy= default.target
Also=foobar-unknown.service
disabling would fail with:
$ ./systemctl --root=/ disable testing.service
Cannot find unit foobar-unknown.service. # this is level debug
Failed to disable: No such file or directory. # this is the error
After the change we proceed:
$ ./systemctl --root=/ disable testing.service
Cannot find unit foobar-unknown.service.
Removed /etc/systemd/system/default.target.wants/testing.service.
This does not affect specifying a missing unit directly:
$ ./systemctl --root=/ disable nosuch.service
Failed to disable: No such file or directory.
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systemctl: use underlines to seperate unit types in listing
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Fixes #4371.
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This commit adds a `fd` option to `StandardInput=`,
`StandardOutput=` and `StandardError=` properties in order to
connect standard streams to externally named descriptors provided
by some socket units.
This option looks for a file descriptor named as the corresponding
stream. Custom names can be specified, separated by a colon.
If multiple name-matches exist, the first matching fd will be used.
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(printf("%.*s", -1, "…") is the same as not specifying the precision at all.)
v2: also underline highlighted (failing) units
Fixes #4137.
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Fix for display of elapsed timers
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loginctl: print TTY field in the session listing
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We should ignore that unit, but otherwise continue.
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When the unit that is triggered by a timer is started and running,
we transition to "running" state, and the timer will not elapse again
until the unit has finished running. In this state "systemctl list-timers"
would display the previously calculated next elapse time, which would
now of course be in the past, leading to nonsensical values.
Simply set the next elapse to infinity, which causes list-timers to
show n/a. We cannot specify when the next elapse will happen, possibly
never.
Fixes #4031.
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It is allowed for unit files to have an mtime==0, so instead of assuming that
any file that had mtime==0 was masked, use the load_state to filter masked
units.
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1384150.
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Apparently this works just fine, so the issue in #4031 is elsewhere.
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It's a common pattern, so add a helper for it. A macro is necessary
because a function that takes a pointer to a pointer would be type specific,
similarly to cleanup functions. Seems better to use a macro.
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Also rewrap some comments so that they don't have a very long line and a very
short line.
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Without the tty it's really hard to tell which session is which.
New output:
$ ./loginctl
SESSION UID USER SEAT TTY
13 1002 zbyszek seat0 tty3
c1 42 gdm seat0 /dev/tty1
11 1002 zbyszek seat0 tty4
3 1002 zbyszek seat0 /dev/tty2
17 1002 zbyszek seat0 tty5
18 1002 zbyszek seat0 tty6
6 sessions listed.
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https://bugzilla.redhat.com/show_bug.cgi?id=1379852
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legacy hierarchy (#4269)
There are overlapping control group resource settings for the unified and
legacy hierarchies. To help transition, the settings are translated back and
forth. When both versions of a given setting are present, the one matching the
cgroup hierarchy type in use is used. Unfortunately, this is more confusing to
use and document than necessary because there is no clear static precedence.
Update the translation logic so that the settings for the unified hierarchy are
always preferred. systemd.resource-control man page is updated to reflect the
change and reorganized so that the deprecated settings are at the end in its
own section.
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endocode/djalal/sandbox-first-protection-kernelmodules-v1
core:sandbox: Add ProtectKernelModules= and some fixes
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basic,coredump: use for loop instead of while
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Fixes: #4181
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