Calling `exit` in sway_terminate prevents sway from correctly shutting
down (freeing data, cleanly terminating the ipc server, etc.).
A better way is to exit straight away if the failure occurs before
`wlc_run` and use sway_abort as usual if it occur when wlc is running.
Sway used to attempt sending an IPC command composed of every argument
after the first non-option argument encountered.
Now, raises an error if an option is encountered before the intended command.
Some options such as -h or -v take effect when parsing, so they still
apply.
The get-socketpath long option had an undocumented short alternative
as `p`. It has been removed.
However, the code in the options array is still the 'p' char.
Using 'flag' results in duplicate code paths for short and long options.
This broke the -q short option in swaymsg, because there was:
{"quiet", no_argument, &quiet, 'q'}
Which will set quiet to 'q' and return 0, not 'q'.
First of all because it's not needed that early, and second of all
because there's a bug where calling `sway --get-socketpath` via `popen`
causes the child sway process to spin/hang instead of returning EOF.
(Specifically `(unset SWAYSOCK; swaymsg)` hangs.) This patch fixes that.
(Also note that this patch moves the "detailed review" comment, so I
guess this patch requires extra detailed review?)
After adding pid to the socket path the `--get-socketpath` command broke
because it doesn't know the pid of the running instance. Fix this by
setting and querying `SWAYSOCK`.
Also ignore `SWAYSOCK` upon normal startup if a socket exists at that
location (ie. from another sway instance), and don't overwrite `I3SOCK`
if it exists either.
