OSC sequences can be closed with one of three terminators:
1. ASCII code 7, aka BEL, aka ^G, aka \x07, aka \a
2. ASCII code 156, aka \x9c
2. Pair of ASCII code 27 followed by ASCII code 92, aka \x1b\x5c
Of these, in some corner case scenarios BEL makes problem (see #34604).
Hence switch away from that wherever we use it, and prefer the \x1b\x5c
instead. That's preferable over \x9c, since the latter is also a valid
UTF-8 codepoint. See discussion here for example:
https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda#the-escape-sequenceFixes: #34604
This effectively reverts d2c1451b73.
After the commit d2ebf5cc1d, sd_varlink_error()
returns negative errno, hence the function always return negative errno
on failure.
Follow-up for 3cb72c7862.
The test container exits shortly, hence when varlinkctl is called, the
container may be already terminated. Let's make the container live
infinitely.
Also, this makes the os-release files removed after the container is started.
Let's make sure that sd_varlink_error() always returns an error code, so
that we can use it in a style "return sd_varlink_error(…);" everywhere,
which has two effects: return a good error reply to clients, and exit
the current stack frame with a failure code.
Interestingly sd_varlink_error_invalid_parameter() already worked like
this in some cases, but sd_varlink_error() itself didn't.
This is an alternative to the error handling tweak proposed in #34882,
but I think is a lot more generically useful, since it establishes a
pattern.
I checked our codebase, and this change should generally be OK without
breaking callsites, since the current callers (with exception of the
machined case from #34882) called sd_varlink_error() in the outermost
varlink method call dispatch stack frame, where this behaviour change
does not alter anything.
This is similar btw, how sd_bus_error_setf() and friends always return
error codes too, synthesized from its parameters.
All our public headers strive to C90 compatibility with a few
extensions, and thus avoided stdbool.h and bool.
The sd_json_format_enabled() helper seems like a poor place to start
requiring stdbool.h now.
Also drop __extension__ since we are not using it anywhere else in very
similar inline functions.
(And we probably should drop any _sd_const declarations on inline
functions. Given that the compiler has the function implementation
around always, because it's in the header there's really no reason to
specify this manually, the compiler can trivially figure this out on its
own. But that's for another time.)
Various fixes:
1. Adds O_CLOEXEC for two socketpair()s where we forgot it.
2. Uses FORK_WAIT instead of manual wait_for_terminate_and_check()
invocations.
3. Prefix opaque NULL/0 arguments with comments what they are.
4. Add a banch of assert()s, and change flag validation in
open_terminal() to be assert() (since flags mistakes are programming
errors, not runtime errors).
Then, when a .netdev file of a stacked netdev is modified, the netdev
can be reconfigured with the updated setting by something like the
following way:
```
ip link del vlan99
networkctl reload
```
Note, removing the vlan interface in the above example may not be necessary,
e.g. when only VLAN flags, egress mapping, or ingress mapping are updated.
But, it is necessary when VLAN ID is updated.
Closes#9627.
Closes#27177.
Closes#34907.
Replaces #22557.
Allows unifying the custom logic for the hostname and root shell. Root
password prompting remains separate as it's logic is substantially
different to the other prompts.
Lennart Poettering
Yu Watanabe
Daan De Meyer
Michal Sekletar
Michael Ferrari