If an application gives the first parameter to OSC 52, validate and pass
on to outside terminal. GitHub issue 3192.

Add args parsing callback for some future work, currently unused.

Hide struct args behind a couple of accessor functions.

calloc cb data so the client is NULL.

Add a -w flag to set- and load-buffer to send to clipboard using OSC 52.
GitHub issue 2363.

Make client -c and -t handling common in cmd-queue.c and try to be
clearer about whether the client is the target client (must have a
session) or not.

Also move cmdq_item and cmdq_list into cmd-queue.c (this is to make its
use more clearly defined and preparation for some future work).

Make struct cmd local to cmd.c and move it out of tmux.h.

Rewrite the code for reading and writing files. Now, if the client is
not attached, the server process asks it to open the file, similar to
how works for stdin, stdout, stderr. This makes special fil

Rewrite the code for reading and writing files. Now, if the client is
not attached, the server process asks it to open the file, similar to
how works for stdin, stdout, stderr. This makes special files like
/dev/fd/X work (used by some shells). stdin, stdout and stderr and
control mode are now just special cases of the same mechanism. This will
also make it easier to use for other commands that read files such as
source-file.

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Add a cmdq_continue function rather than twiddling the flag directly.

Use the right client when working out where to save or load the buffer,
reported by kn@.

Memory leaks, from Gang Fan in GitHub issue 1453.

Do not leak path or use it after free.

Expand formats in load-buffer and save-buffer.

Some unused code, GitHub issue 1219.

Memory leaks, from David CARLIER.

Make source-file look for files relative to the client working directory
(like load-buffer and save-buffer), from Chris Pickel. Also break the
where-is-this-file code out into its own function for lo

Make source-file look for files relative to the client working directory
(like load-buffer and save-buffer), from Chris Pickel. Also break the
where-is-this-file code out into its own function for loadb and saveb.

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Nits found with clang.

Buffer name can be NULL, check before strdup().

Mass rename struct cmd_q to struct cmdq_item and related.

Rewrite command queue handling. Each client still has a command queue,
but there is also now a global command queue. Instead of command queues
being dispatched on demand from wherever the command hap

Rewrite command queue handling. Each client still has a command queue,
but there is also now a global command queue. Instead of command queues
being dispatched on demand from wherever the command happens to be
added, they are now all dispatched from the top level server
loop. Command queues may now also include callbacks as well as commands,
and items may be inserted after the current command as well as at the end.

This all makes command queues significantly more predictable and easier
to use, and avoids the complex multiple nested command queues used by
source-file, if-shell and friends.

A mass rename of struct cmdq to a better name (cmdq_item probably) is
coming.

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Add CMD_AFTERHOOK flag to the easy commands that don't need any special handling.

Add static in cmd-* and fix a few other nits.

Do not use c->cwd or s->cwd if it is NULL, found by Ben Boeckel.

Use member names in cmd_entry definitions so I stop getting confused
about the order.