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sd-bus: always fill in sd_bus_error paramters, on error
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resolved: debugging improvements
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Whenever one of our calls is invoked with a non-NULL, writable
sd_bus_error parameter, let's fill in some valid error on failure. We
previously only filled in remote errors, but never local errors, which is
hard to handle by users. Hence, let's clean this up to always fill in
the error.
This introduces a new bus_assert_return() macro that works like
assert_return() but optionally also initializes a bus_error struct.
Fixes #224.
Based on a patch by Umut Tezduyar.
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Allow arbitrary file paths to be passed to nspawn (v3)
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resolved: enable synthesizing of A, AAAA and PTR records for "localhost"
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nss-myhostname: use LOOPBACK_IFINDEX instead of if_nametoindex("lo")
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There's no reason to explicitly turn off bus activation for resolved
here. The reason this was done before was that the code was copied from
nss-resolve, which has a fallback to glibc's nss-dns if resolved is not
reachable. However, such a logic makes no sense for resolve-host since
such a fallback doesn't make sense here, which means we can actually
turn on activation. Let's do it hence.
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sd-bus: do not connect to dbus-1 socket when kdbus is available
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We should never allow leaking of "localhost" queries onto the network,
even if there's an explicit domain rotue set for this.
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Let's make sure that clients querying resolved via the bus for A, AAAA
or PTR records for "localhost" get a synthesized, local reply, so that
we do not hit the network.
This makes part of nss-myhostname redundant, if used in conjunction.
However, given that nss-resolve shall be optional we need to keep this
code in both places for now.
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Given that we already hardocde the loopback ifindex, following the
kernel's own logic, we can replace the invocation of
if_nametoindex("lo") with LOOPBACK_IFINDEX.
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Since dacd6cee76a08331b8c8616c5f30f70ee49aa2f9 the two OOM's are
ignored as the value of r will be overwritten and we only log in
the fail section anyway.
This patch jumps to fail on OOM.
Note that this is different behavior compared to both the current
code and previous to dacd6cee76a08331b8c8616c5f30f70ee49aa2f9. Before
that commit we would log that saving the inhibit data failed, but
still write the file, though without the WHO/WHY section.
CID# 1313545
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sd-daemon: return EBADF for invalid fd numbers
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support reboot -f for kexec kernel
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treewide: trivial issues detected by smatch
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Fix error message:
-->--
Code should not be reached 'Unknown action.' at
src/systemctl/systemctl.c:6382, function halt_now(). Aborting.
Aborted
--<--
when executing 'reboot -f' from a system running a kexec kernel.
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add_automount() was only used on EFI systems, compile it conditionally
to avoid the warning.
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We should not fall back to dbus-1 and connect to the proxy when kdbus
returns an error that indicates that kdbus is running but just does not
accept new connections because of quota limits or something similar.
Using is_kdbus_available() in libsystemd/ requires it to move from
shared/ to libsystemd/.
Based on a patch from David Herrmann:
https://github.com/systemd/systemd/pull/886
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The partition-type flags are defined independently for every partition-type. Apply
them only to the types where they are defined, and not to the ESP, which does not
appear to share the same set of flags.
https://github.com/systemd/systemd/issues/920
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Coverity #1299013
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event cannot be NULL due to assert
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bus can never be NULL due to assert
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: characters can be entered with the \: escape sequence.
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Overlayfs uses , as an option separator and : as a list separator. These
characters are both valid in file paths, so overlayfs allows file paths
which contain these characters to backslash escape these values.
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This modifies the strv in-place, replacing strings with their escaped
version. It's mostly just a convenience function for when you need to
join a strv together because it's passed as a string to something, and
the separator needs escaping.
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This is for shell-style \ escaping rather than quoting, which while it
has the same effect in produced shell commands, is not exclusively
useful for shell commands.
shell_escape would be useful for producing sed commands, as you would be
able to \ escape the normal special characters, plus whichever argument
separator was chosen; or it could be used to escape arguments passed to
the overlayfs mount command.
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: characters in bind paths can be entered as the \: escape sequence.
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strv_split_extract is to strv_split_quotes as extract_first_word was to
unquote_first_word.
Now there's extract_first_word for extracting a single argument,
extract_many_words for extracting a bounded number of arguments,
and strv_split_extract for extracting an arbitrary number of arguments.
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This now accepts : characters with the \: escape sequence.
Other escape sequences are also interpreted, but having a \ in your file
path is less likely than :, so this shouldn't break anyone's existing
tools.
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If EXTRACT_DONT_COALESCE_SEPARATORS is passed, then leading separators,
trailing separators and spans of multiple separators aren't skipped, and
empty arguments from before, after or between separators may be extracted.
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This adds an EXTRACT_QUOTES option to allow the previous behaviour, of
not interpreting any character inside ' or " quotes as separators.
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It now takes a separators argument, which defaults to WHITESPACE if NULL
is passed.
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To add a flag to allow an empty string to be parsed as an argument, we
need to be able to distinguish between the end of the string, and after
the end of the string, so when we *do* reach the end, let's set *p to
this state.
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This is so that, when called in a loop, unquote_first_word can
distinguish between reaching the end of a string because it has consumed
all the input before the end, and consuming all the input.
This is important because we later add a flag that allows
char *in = "";
char *out;
unquote_first_word(&in, &out, flags);
To put "" in out, and set in = NULL, so the trailing empty string of the
input can be consumed, and mark that the input has been consumed.
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This matches what open(2) and other system functions do.
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Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
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https://bugzilla.redhat.com/show_bug.cgi?id=1251334
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Fix for #376, plus some other fixes
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This splits up the stopping logic for machines into two steps: first on
machine_stop() we begin with the shutdown of a machine by queuing the
stop method call for it. Then, in machine_finalize() we actually remove
the rest of its runtime context. This mimics closely how sessions are
handled in logind.
This also reworks the GC logic to strictly check the current state of
the machine unit, rather than shortcutting a few cases, like for example
assuming that UnitRemoved really means a machine is gone (which it isn't
since Reloading might trigger it, see #376).
Fixes #376.
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We never made use of it, let's get rid of it.
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Use mfree() where we can.
Drop unnecessary {}.
Drop unnecessary variable declarations.
Cast syscall invocations where explicitly don't care for the return
value to (void).
Reword a comment.
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If we get a weird signal, then we should log about it, but not return an
error, since sd-bus will not call us again then anymore, but for these
signals we match here we actually do want to be called on the next
invocation.
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The kernel nowadays sends these along, and that's OK, hence don't even
debug log about it, but completely ignore it.
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execute: don't fail if we create the runtime directory from two proce…
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