Commit Graph

28 Commits

Author SHA1 Message Date
Nicholas Marriott
3964309c67 Add a command queue to standardize and simplify commands that call other
commands and allow a command to block execution of subsequent commands. This
allows run-shell and if-shell to be synchronous which has been much requested.

Each client has a default command queue and commands are consumed one at a time
from it. A command may suspend execution from the queue by returning
CMD_RETURN_WAIT and then resume it by calling cmd_continue() - for example
run-shell does this from the callback that is fired after the job is freed.

When the command queue becomes empty, command clients are automatically exited
(unless attaching). A callback is also fired - this is used for nested commands
in, for example, if-shell which can block execution of the client's cmdq until
a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the old
curclient/cmdclient distinction - a cmdq is bound to one client (or none if in
the configuration file), this is a command client if c->session is NULL
otherwise an attached client.
2013-02-23 22:25:58 +00:00
Tiago Cunha
1f5e6e35d5 Sync OpenBSD patchset 1151:
Make command exec functions return an enum rather than -1/0/1 values and
add a new value to mean "leave client running but don't attach" to fix
problems with using some commands in a command sequence. Most of the
work by Thomas Adam, problem reported by "jspenguin" on SF bug 3535531.
2012-07-11 19:37:32 +00:00
Tiago Cunha
a432fcd306 Sync OpenBSD patchset 1150:
xfree is not particularly helpful, remove it. From Thomas Adam.
2012-07-11 19:34:16 +00:00
Tiago Cunha
ffab6dbc9a Sync OpenBSD patchset 1114:
Instead of passing stdin/stdout/stderr file descriptors over imsg and
handling them in the server, handle them in the client and pass buffers
over imsg. This is much tidier for some upcoming changes and the
performance hit isn't critical.

The tty fd is still passed to the server as before.

This bumps the tmux protocol version so new clients and old servers are
incompatible.
2012-05-22 20:56:35 +00:00
Tiago Cunha
a8ca1340ad Sync OpenBSD patchset 968:
Try to resolve relative paths for loadb and saveb (first using client
working directory if any then default-path or session wd).
2011-10-23 15:08:58 +00:00
Tiago Cunha
653d1e2fc8 Sync OpenBSD patchset 964:
Plug a memory leak and update some comments, from Tiago Cunha.
2011-10-23 15:02:20 +00:00
Tiago Cunha
391f1f08c0 Expand the Id keyword. 2011-07-09 09:42:33 +00:00
Tiago Cunha
3cb428bc7e Sync OpenBSD patchset 912:
Use xfree not free, from Tiago Cunha.
2011-05-18 20:33:55 +00:00
Tiago Cunha
1df427bc7b Sync OpenBSD patchset 829:
Clean up and simplify tmux command argument parsing.

Originally, tmux commands were parsed in the client process into a
struct with the command data which was then serialised and sent to the
server to be executed. The parsing was later moved into the server (an
argv was sent from the client), but the parse step and intermediate
struct was kept.

This change removes that struct and the separate parse step. Argument
parsing and printing is now common to all commands (in arguments.c) with
each command left with just an optional check function (to validate the
arguments at parse time), the exec function and a function to set up any
key bindings (renamed from the old init function).

This is overall more simple and consistent.

There should be no changes to any commands behaviour or syntax although
as this touches every command please watch for any unexpected changes.
2011-01-07 14:45:34 +00:00
Tiago Cunha
9ebee6aef8 Global paste buffers instead of per-session which renders copy-buffer useless.
As a consequence buffer-limit is now a server option.
2010-12-30 22:39:49 +00:00
Tiago Cunha
64d16cf2d6 Sync OpenBSD patchset 801:
Unify the way sessions are used by callbacks - store the address and use
the reference count, then check it is still on the global sessions list
in the callback.
2010-12-22 15:28:51 +00:00
Tiago Cunha
d7bae0edce Sync OpenBSD patchset 741:
When changing so that the client passes its stdout and stderr as well as
stdin up to the server, I forgot one essential point - the tmux server
could now be both the producer and consumer. This happens when tmux is
run inside tmux, as well as when piping tmux commands together.

So, using stdio(3) was a bad idea - if sufficient data was written, this
could block in write(2). When that happened and the server was both
producer and consumer, it deadlocks.

Change to use libevent bufferevents for the client stdin, stdout and
stderr instead. This is trivial enough for output but requires a
callback mechanism to trigger when stdin is finished.

This relies on the underlying polling mechanism for libevent to work
with whatever devices to which the user could redirect stdin, stdout or
stderr, hence the change to use poll(2) over kqueue(2) for tmux.
2010-08-09 21:44:25 +00:00
Tiago Cunha
e4573de97b Sync OpenBSD patchset 731:
Send all three of stdin, stdout, stderr from the client to the server, so that
commands can directly make use of them. This means that load-buffer and
save-buffer can have "-" as the file to read from stdin or write to stdout.

This is a protocol version bump so the tmux server will need to be restarted
after upgrade (or an older client used).
2010-07-02 02:52:13 +00:00
Tiago Cunha
8da8bc477f Sync OpenBSD patchset 652:
In load-buffer, read until EOF rather than using stat() and reading a fixed
size. Allows use of FIFOs and whatnot. From Tiago Cunha, idea from Fulvio
Ciriaco.
2010-02-26 13:30:07 +00:00
Tiago Cunha
91cf94b34b Sync OpenBSD patchset 570:
Change paranoia check to check for <= 0 and to avoid warning.
2009-11-28 14:55:22 +00:00
Tiago Cunha
fabf40b3b3 Sync OpenBSD patchset 569:
Tidy up various bits of the paste code, make the data buffer char * and add
comments.
2009-11-28 14:54:12 +00:00
Tiago Cunha
e35f5b35bd Sync OpenBSD patchset 539:
Get rid of the ugly CMD_CHFLAG macro and use a const string (eg "dDU") in the
command entry structs and a couple of functions to check/set the flags.
2009-11-14 17:56:39 +00:00
Tiago Cunha
d0afc47bfb Sync OpenBSD patchset 465:
Call fstat() after fopen() rather than stat() before.
2009-10-28 23:10:05 +00:00
Tiago Cunha
c272de7cba Sync OpenBSD patchset 318:
Give each paste buffer a size member instead of requiring them to be
zero-terminated.
2009-09-07 23:48:54 +00:00
Tiago Cunha
56dd5dfff4 Sync OpenBSD patchset 206:
Don't babysit people and let them try to load /dev/zero or (more useful)
/dev/null if they want.
2009-07-30 21:07:23 +00:00
Tiago Cunha
d637cb33da Sync OpenBSD patchset 181:
Make all messages sent between the client and server fixed size.

This is the first of two changes to make the protocol more resilient and less
sensitive to other changes in the code, particularly with commands. The client
now packs argv into a buffer and sends it to the server for parsing, rather
than doing it itself and sending the parsed command data.

As a side-effect this also removes a lot of now-unused command marshalling
code.

Mixing a server without this change and a client with or vice versa will cause
tmux to hang or crash, please ensure that tmux is entirely killed before
upgrading.
2009-07-28 22:12:16 +00:00
Nicholas Marriott
097b96ea44 Having fixed flags for single-character getopt options is a bit hard to
maintain and is only going to get worse as more are used. So instead, add a new
uint64_t member to cmd_entry which is a bitmask of upper and lowercase options
accepted by the command.

This means new single character options can be used without the need to add it
explicitly to the list.
2009-07-14 06:43:33 +00:00
Nicholas Marriott
5afe17d147 Fix $Id$. 2009-07-09 18:08:29 +00:00
Nicholas Marriott
4422b958c3 Don't leak FILE * on malloc failure. From ivoire at users dot sourceforge dot
net.
2009-07-09 18:05:17 +00:00
Nicholas Marriott
a8ec5f1d09 stat(2) files before trying to load them to avoid problems, for example with "source-file /dev/zero".
This commit dedicated to Tom: protecting idiots from their own stupidity for more than 20 years.
2009-05-21 19:38:51 +00:00
Nicholas Marriott
a03cf0e183 +b on fopen. 2009-05-18 16:22:30 +00:00
Nicholas Marriott
7b18a9a6eb Avoid warning. 2009-01-27 23:26:15 +00:00
Tiago Cunha
f62ed6aaa3 load-buffer command 2009-01-25 19:00:10 +00:00