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As suggested here:
https://bugs.freedesktop.org/show_bug.cgi?id=64737#c8
This adds a new call terminal_is_dumb() and makes use of this where
appropriate.
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but also on all other consoles. This does help on e.g. mainframes
where often a serial console together with other consoles are
used. Even rack based servers attachted to both a serial console
as well as having a virtual console do sometimes miss a connected
monitor.
To be able to ask on all terminal devices of /dev/console the devices
are collected. If more than one device are found, then on each of the
terminals a inquiring task for passphrase is forked and do not return
to the caller.
Every task has its own session and its own controlling terminal.
If one of the tasks does handle a password, the remaining tasks
will be terminated.
Also let contradictory options on the command of
systemd-tty-ask-password-agent fail.
Spwan for each device of the system console /dev/console a own process.
Replace the system call wait() with with system call waitid().
Use SIGTERM instead of SIGHUP to get unresponsive childs down.
Port the collect_consoles() function forward to a pulbic and strv
based function "get_kernel_consoles()" in terminal-util.c and use this
in tty-ask-password-agent.c.
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After all it's something that we query over and over.
For example, systemctl calls colors_enabled() four times for each failing
service. The compiler is unable to optimize those calls away because they
(potentially) accesses external and global state through on_tty() and
getenv().
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transient service
Otherwise we might end resetting /dev/console all the time when a transient service starts or stops.
Fixes #2377
Fixes #2198
Fixes #2061
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... to determine if color output should be enabled. If the variable is not set,
fall back to using on_tty(). Also, rewrite existing code to use
colors_enabled() where appropriate.
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gcc is confused by the common idiom of
return errno ? -errno : -ESOMETHING
and thinks a positive value may be returned. Replace this condition
with errno > 0 to help gcc and avoid many spurious warnings. I filed
a gcc rfe a long time ago, but it hard to say if it will ever be
implemented [1].
Both conventions were used in the codebase, this change makes things
more consistent. This is a follow up to bcb161b0230f.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61846
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My previous patch to only include what we use accidentially placed
the added inlcudes in non-sorted order.
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This is a cleaned up result of running iwyu but without forward
declarations on src/basic.
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It's very specific to the core, and not used elsewhere, hence move it
out of terminal-util.[ch].
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socket-util.[ch]
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There are more than enough to deserve their own .c file, hence move them
over.
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string-util.[ch]
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.
This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.
Also touches a few unrelated include files.
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Before, we'd always reset acquired terminals, which is not really
desired, as we expose a setting TTYReset= which is supposed to control
whether the TTY is reset or not. Previously that setting would only
enable a second resetting of the TTY, which is of course pointless...
Hence, move the implicit resetting out of acquire_terminal() and make
the callers do it if they need it.
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With this change we'll open the shell's tty right from machined and then
pass it to the transient unit we create. This way we make sure the pty
is opened exactly as long as the transient service is around, and no
longer, and vice versa. This way pty forwarders do not have to deal with
EIO problems due to vhangup, as the pty is open all the time from the
point we set things up to the point where the service goes away.
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The internal speaker is usually not available on modern latops that
support suspend, and even if it is available in the hardware, most
distributions turned support for it off in the kernel. And even if it is
enabled, it's probably still a bad idea to make use of it for the
suspend-failures. If anything a proper sound should be played.
Long story short, let's remove support of this anachronism.
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This introduces a new systemd.crash_reboot=1 kernel command line option
that triggers a reboot after crashing.
This also cleans up crash VT handling. Specifically, it cleans up the
configuration setting, to be between 1..63 or a boolean. This is to
replace the previous logic where "-1" meant disabled. We continue to
accept that setting, but only document the boolean syntax instead.
This also brings the documentation of the default settings in sync with
what actually happens.
The CrashChVT= configuration file setting is renamed to CrashChangeVT=,
following our usual logic of not abbreviating unnecessarily. The old
setting stays support for compat reasons.
Fixes #1300
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Let's underline the header line of the table shown by cgtop, how it is
customary for tables. In order to do this, let's introduce new ANSI
underline macros, and clean up the existing ones as side effect.
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The call is like ptsname() but does not assume the pty path was
accessible in the local namespace. It uses the same internal ioctl
though.
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That's just handle this as a normal error.
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In case of non-CLOCAL lines (i.e. those with carrier detect configured)
we shouldnt wait for a carrier if all we try to do is reset the TTY.
Hence, whenever we open such a TTY pass O_NONBLOCK.
Note that we continue to open ttys we intend to write to without
O_ONBLOCK, we only add it in cases we invoke ioctl()s or other terminal
operations without reading or writing to the device.
Fixes #835.
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basic/ can be used by everything
cannot use anything outside of basic/
libsystemd/ can use basic/
cannot use shared/
shared/ can use libsystemd/
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