D-Bus is inherently racy when a function returns an object path for a
newly allocated object the client shall watch: as the object already
exists before the client can subscribe to it, it might lose messages
from it.
Let's fix this, by explicitly querying unit properties right after
subscribing to its property changes.
Fixes: #4920
usec_t is always 64bit, which means it can cover quite a number of
years. However, 4 digit year display and glibc limitations around time_t
limit what we can actually parse and format. Let's make this explicit,
so that we never end up formatting dates we can#t parse and vice versa.
Note that this is really just about formatting/parsing. Internal
calculations with times outside of the formattable range are not
affected.
Passing a year such as 1960 to mktime() will result in a negative return
value. This is quite confusing, as the man page claims that on failure
the call will return -1...
Given that our own usec_t type is unsigned, and we can't express times
before 1970 hence, let's consider all negative times returned by
mktime() as invalid, regardless if just -1, or anything else negative.
There's no point in updating exec_target for each binary we try to
execute, if we override it right-away anyway... Let's just do this once,
and include all binaries we try each time.
Follow-up for 1a68e1e543.
"systemctl show -pUnknown <service>" used to exit with '0' even if the property
passed by '-p' doesn't exist. But since commit 3dced37b7c (v231+),
it exits with a failure status.
"systemctl show" is supposed to be scriptable and therefore its behavior is
supposed to be stable.
This patch restores the old behavior on which a couple of scripts already rely
now.
Also when the requested property doesn't exist, it always logs it at the debug
level since this part of the code is only used by the show command.
Fixes: #5118
The general rule is:
- code in shared/ should take an "original_root" argument (possibly NULL)
and pass it along down to chase_symlinks
- code in core/ should always use specify original_root==NULL, since we
don't support running the manager from non-root directory
- code in systemctl and other tools should pass arg_root.
For any code that is called from tools which support --root, chase_symlinks
must be used to look up paths.
The following are all equivalent:
--unit foo.service bar.service
--unit=foo.service bar.service
--unit=foo.service --unit=bar.service
foo.service bar.service --unit
Similarly for --user-unit.
The only case that doesn't work well is when --unit and --user-unit are mixed:
--unit=foo.service --user-unit=bar.service
We'll treat both names as user units. I think this is OK.
$ systemd-cgls -u systemd-journald.service machine.slice
I opted for a "global" switch, instead of modifying the behaviour of just one
argument. It seem to be a more useful setting, since usually one will want to
query one or more units, and not mix unit names with paths.
Closes#5156.
show_cgroup_get_root_and_warn is renamed to show_cgroup_get_path_and_warn
because it now optionally allows querying a non-root path.
This removes duplicated code and teaches cgtop to combine
-M with a root prefix:
$ systemd-cgtop -M myprecious /system.slice
...
76ec966f0e changed the code from ESHUTDOWN to ERFKILL, but missed one
spot in bus-common-errors.c. Fix that.
The code in transaction.c was checking for ERFKILL, but I'm not sure if this
mismatch had any effect, i.e. if there were any code paths in which the wrong
code actually made difference.
Also add comments when ESHUTDOWN is used in the journal code, so it's easy to
distinguish those cases when grepping. Standarize on the same capitalization.
(There's also a bunch of uses in sd-bus.c, but that's clearly different.)
'systemctl --failed' is an extremely common operation and it's nice to have
a shortcut for it.
Revert "man: don't document systemctl --failed" and add the option back to
systemctl's help and shell completion scripts.
This reverts commit 036359ba8d.
If "3", "5", "systemd.unit=", or similar are present on the kernel command line,
the system will not enter into offline update. This behaviour is in line with the
general logic that configuration on the kernel command line has higher priority
than the configuration on disk, but is rather surprising. Emit a warning to help
users diagnose the situation.
https://bugzilla.redhat.com/show_bug.cgi?id=1405439#c4
* logind: trivial simplification
free_and_strdup() handles NULL arg, so make use of that.
* boot: fix two typos
* pid1: rewrite check in ignore_proc() to not check condition twice
It's harmless, but it seems nicer to evaluate a condition just a single time.
* core/execute: reformat exec_context_named_iofds() for legibility
* core/execute.c: check asprintf return value in the usual fashion
This is unlikely to fail, but we cannot rely on asprintf return value
on failure, so let's just be correct here.
CID #1368227.
* core/timer: use (void)
CID #1368234.
* journal-file: check asprintf return value in the usual fashion
This is unlikely to fail, but we cannot rely on asprintf return value
on failure, so let's just be correct here.
CID #1368236.
* shared/cgroup-show: use (void)
CID #1368243.
* cryptsetup: do not return uninitialized value on error
CID #1368416.
The failure message is typically currently:
execv() failed: No such file or directory
which is not very useful because it doesn’t tell you which file or
directory it was trying to exec.
networkd: Allow ':' in label
This reverts a341dfe563 and takes a slightly different approach: anything is
allowed in network interface labels, but network interface names are verified
as before (i.e. amongst other things, no colons are allowed there).
src/nss-resolve/nss-resolve.c: In function ‘_nss_resolve_gethostbyname_r’:
src/nss-resolve/nss-resolve.c:680:13: warning: RES_USE_INET6 is deprecated
NSS_GETHOSTBYNAME_FALLBACKS(resolve);
^~~~~~~~~~~~~~~~~~~~~~~~~
In glibc bz #19582, RES_USE_INET6 was deprecated. This might make sense for
clients, but they didn't take into account nss module implementations which
*must* continue to support the option. glibc internally defines
DEPRECATED_RES_USE_INET6 which can be used without emitting a warning, but
it's not exported publicly. Let's do the same, and just copy the definition
to our header.
gcc 7 adds -Wimplicit-fallthrough=3 to -Wextra. There are a few ways
we could deal with that. After we take into account the need to stay compatible
with older versions of the compiler (and other compilers), I don't think adding
__attribute__((fallthrough)), even as a macro, is worth the trouble. It sticks
out too much, a comment is just as good. But gcc has some very specific
requiremnts how the comment should look. Adjust it the specific form that it
likes. I don't think the extra stuff we had in those comments was adding much
value.
(Note: the documentation seems to be wrong, and seems to describe a different
pattern from the one that is actually used. I guess either the docs or the code
will have to change before gcc 7 is finalized.)
```
-bash-4.3# systemd-run --property BindPaths=/etc:tmp/hey sh -c 'ls /tmp/hey'
```
prints
`Destination path tmp/hey is not absolute.`
instead of
`Destination path /etc is not absolute.`
CID #1368239
