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sent to stdin before it is needed, which can be inconvenient (eg pasting
commands). Instead, start with stdin disabled and reuse MSG_STDIN from
server->client to mean that stdin should be enabled. Based on a diff
from Chris Johnsen.
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Change a log to fprintf that was missed last time around, from Tiago Cunha.
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xfree is not particularly helpful, remove it. From Thomas Adam.
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Actually write all the data to stdout/stderr.
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Add a skeleton mode to tmux (called "control mode") that let's tmux
commands be sent and output received on stdout. This can be used to
integrate with other terminal emulators and should allow some other
things to be made simpler later. More to come so doesn't do much yet and
deliberately not documented.
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Simplify logging and just fprintf(stderr, ...) for early errors.
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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.
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Add missing prototype.
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Use an enum for client exit reasons, from George Nachman.
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Add sys/file.h.
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Move MSG_IDENTIFY to the last sent by the client, this will be needed by
control clients and irrelevant for others.
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Use a lock file and flock() to serialize server start, avoids problems
when running a bunch of tmux from cron at the same time. Based on a diff
from Tim Ruehsen.
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Add a -P option to detach to HUP the client's parent process (usually
causing it to exit as well).
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Move all calls to fcntl(...O_NONBLOCK) into a function and clear the
flag on the stdio file descriptors before closing them (fixes things
like "tmux ls && cat").
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Merge the before and after attach client code into one in client.c
(instead of two in tmux.c and client.c).
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Trying to set FD_CLOEXEC on every fd is a lost cause, just use
closefrom() before exec.
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Can't call event_del() without event_set() first - so call event_set()
when setting up the client.
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MSG_EXIT can now have a return code in the message, so check for that
size as well. Stops the client fatal()ing on exit.
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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).
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Fix problems with window sizing seen by Raghavendra D Prabhu when
starting tmux from .xinitrc.
One of the very few things the server relies on the client for now is to
pass through a message on SIGWINCH, but there is a condition where
potentially a SIGWINCH may be lost during the transition from unattached
(main.c) to attached (client.c). So trigger a size change immediately
after the client installs its SIGWINCH handler.
Also, when the terminal is resized, reset the scroll region and cursor
position. Previously, we were clearing our saved idea of these, but in
fact some terminals do not reset them on resize, so this caused problems
during redraw.
While here make a resize to the same size not cause a redraw and rename
the tmux.out output log file to include the tmux PID.
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This ioctl(TIOCGWINSZ) call is no longer necessary, the result is never
used and the server now does it later on the tty fd directly.
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Catch SIGHUP and terminate if running as a client. This prevents clients
from being left hanging around when, for example, a SSH session is
disconnected.
ok nicm@
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Make signal handler setup/teardown two common functions instead of six,
and reset SIGCHLD after fork to fix problems with some shells. From
Romain Francoise.
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Massive spaces->tabs and trailing whitespace cleanup, hopefully for the last
time now I've configured emacs to make them displayed in really annoying
colours...
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Remove a couple of unused arguments where possible, and add /* ARGSUSED */ to
the rest to reduce lint output.
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imsg_read returns ssize_t not int, pointed out by lint via deraadt.
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Don't return 1 unless there was actually a problem (signal/lost server) rather
than for all events (normal exit/detach/etc).
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Move some common code into a function.
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Initial changes to move tmux to libevent.
This moves the client-side loops are pretty much fully over to event-based only
(tmux.c and client.c) but server-side (server.c and friends) treats libevent as
a sort of clever poll, waking up after every event to run various things.
Moving the server stuff over to bufferevents and timers and so on will come
later.
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Leftover unused variable :-/.
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There isn't much point in doing lstat before connect so instead just do connect
and handle ENOENT from it which is a little tidier.
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Clear signal flags /before/ taking action and continue afterwards to reduce
chance of dropping signals. Pointed out by deraadt@.
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Tidy identify message send into a separate function.
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Client tidying: get rid of client_ctx struct in favour of two variables in
client.c, and move the functions in client-fn.c into other files.
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Do this in a better way - print messages when exiting with nonzero.
Also remove the login shell information from server-info, only the client
should care about it.
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Don't print exit messages when used as a login shell, requested by martynas@ a
while back.
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Support -c like sh(1) to execute a command, useful when tmux is a login
shell. Suggested by halex@.
This includes another protocol version increase (the last for now) so again
restart the tmux server before upgrading.
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Remove the internal tmux locking and instead detach each client and run the
command specified by a new option "lock-command" (by default "lock -np") in
each client.
This means each terminal has to be unlocked individually but simplifies the
code and allows the system password to be used to unlock.
Note that the set-password command is gone, so it will need to be removed from
configuration files, and the -U command line flag has been removed.
This is the third protocol version change so again it is best to stop the tmux
server before upgrading.
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Trim some code by moving the ioctl(TIOCGWINSZ) after SIGWINCH from the client
into the server.
This is another (the second of four) protocol version changes coming this
morning, so again the server should be killed before upgrading.
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Don't attempt to open() the tty path, rely on the client sending its stdin fd
with imsg and fatal if it doesn't, then set the FD_CLOEXEC flag in tty_init
instead of tty_open to prevent them leaking into child processes if any are
created between the two calls.
This bumps the protocol version, so the tmux server should be killed before
upgrading.
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Regularise some fatal messages.
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Fix a race condition when asking a client to take over the terminal (switching
to a different poll loop):
If a MSG_READY was followed very quickly by a MSG_EXIT (for example if doing
"tmux new 'exit'"), both messages could be read as part of the same imsg_read
in the first client poll loop. The MSG_READY would then cause a switch to the
second client loop, which would immediately call poll(2) again, causing the
client to hang forever waiting for an exit message that it already had.
Change to call imsg_get to process any existing messages before polling.
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use the error and exit on MSG_EXIT (it was being handled in the default
case). Undo the last change, move the errstr check into the MSG_EXIT case, and
add a comment.
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