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tmux/server-client.c
Nicholas Marriott 641191ab20 Support for windows larger than the client. 
This adds two new options, window-size and default-size, and a new
command, resize-window.

The force-width and force-height options, and the session_width and
session_height formats have been removed.

The new window-size option tells tmux how to work out the size of
windows: largest means it picks the size of the largest session,
smallest the smallest session (similar to the old behaviour) and
manual means that it does not automatically resize
windows. aggressive-resize modifies the choice of session for largest
and smallest as it did before.

If a window is in a session attached to a client that is too small,
only part of the window is shown. tmux attempts to keep the cursor
visible, so the part of the window displayed is changed as the cursor
moves (with a small delay, to try and avoid excess redrawing when
applications redraw status lines or similar that are not currently
visible).

Drawing windows which are larger than the client is not as efficient
as those which fit, particularly when the cursor moves, so it is
recommended to avoid using this on slow machines or networks (set
window-size to smallest or manual).

The resize-window command can be used to resize a window manually. If
it is used, the window-size option is automatically set to manual for
the window (undo this with "setw -u window-size"). resize-window works
in a similar way to resize-pane (-U -D -L -R -x -y flags) but also has
-a and -A flags. -a sets the window to the size of the smallest client
(what it would be if window-size was smallest) and -A the largest.

For the same behaviour as force-width or force-height, use
resize-width -x or -y.

If the global window-size option is set to manual, the default-size
option is used for new windows. If -x or -y is used with new-session,
that sets the default-size option for the new session.

The maximum size of a window is 10000x10000. But expect applications
to complain and higher memory use if you make a window that big. The
minimum size is the size required for the current layout including
borders.

This change allows some code improvements, most notably that since
windows can now never be cropped, that code can be removed from the
layout code, and since panes can now never be outside the size of the
window, window_pane_visible can be removed.
2018-08-20 15:22:14 +01:00

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/* $OpenBSD$ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
static void server_client_free(int, short, void *);
static void server_client_check_focus(struct window_pane *);
static void server_client_check_resize(struct window_pane *);
static key_code server_client_check_mouse(struct client *);
static void server_client_repeat_timer(int, short, void *);
static void server_client_click_timer(int, short, void *);
static void server_client_check_exit(struct client *);
static void server_client_check_redraw(struct client *);
static void server_client_set_title(struct client *);
static void server_client_reset_state(struct client *);
static int server_client_assume_paste(struct session *);
static void server_client_clear_identify(struct client *,
struct window_pane *);
static void server_client_dispatch(struct imsg *, void *);
static void server_client_dispatch_command(struct client *, struct imsg *);
static void server_client_dispatch_identify(struct client *, struct imsg *);
static void server_client_dispatch_shell(struct client *);
/* Number of attached clients. */
u_int
server_client_how_many(void)
{
struct client *c;
u_int n;
n = 0;
TAILQ_FOREACH(c, &clients, entry) {
if (c->session != NULL && (~c->flags & CLIENT_DETACHING))
n++;
}
return (n);
}
/* Identify mode callback. */
static void
server_client_callback_identify(__unused int fd, __unused short events,
void *data)
{
server_client_clear_identify(data, NULL);
}
/* Set identify mode on client. */
void
server_client_set_identify(struct client *c, u_int delay)
{
struct timeval tv;
tv.tv_sec = delay / 1000;
tv.tv_usec = (delay % 1000) * 1000L;
if (event_initialized(&c->identify_timer))
evtimer_del(&c->identify_timer);
evtimer_set(&c->identify_timer, server_client_callback_identify, c);
if (delay != 0)
evtimer_add(&c->identify_timer, &tv);
c->flags |= CLIENT_IDENTIFY;
c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
server_redraw_client(c);
}
/* Clear identify mode on client. */
static void
server_client_clear_identify(struct client *c, struct window_pane *wp)
{
if (~c->flags & CLIENT_IDENTIFY)
return;
c->flags &= ~CLIENT_IDENTIFY;
if (c->identify_callback != NULL)
c->identify_callback(c, wp);
c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
server_redraw_client(c);
}
/* Check if this client is inside this server. */
int
server_client_check_nested(struct client *c)
{
struct environ_entry *envent;
struct window_pane *wp;
envent = environ_find(c->environ, "TMUX");
if (envent == NULL || *envent->value == '\0')
return (0);
RB_FOREACH(wp, window_pane_tree, &all_window_panes) {
if (strcmp(wp->tty, c->ttyname) == 0)
return (1);
}
return (0);
}
/* Set client key table. */
void
server_client_set_key_table(struct client *c, const char *name)
{
if (name == NULL)
name = server_client_get_key_table(c);
key_bindings_unref_table(c->keytable);
c->keytable = key_bindings_get_table(name, 1);
c->keytable->references++;
}
/* Get default key table. */
const char *
server_client_get_key_table(struct client *c)
{
struct session *s = c->session;
const char *name;
if (s == NULL)
return ("root");
name = options_get_string(s->options, "key-table");
if (*name == '\0')
return ("root");
return (name);
}
/* Is this table the default key table? */
static int
server_client_is_default_key_table(struct client *c, struct key_table *table)
{
return (strcmp(table->name, server_client_get_key_table(c)) == 0);
}
/* Create a new client. */
struct client *
server_client_create(int fd)
{
struct client *c;
setblocking(fd, 0);
c = xcalloc(1, sizeof *c);
c->references = 1;
c->peer = proc_add_peer(server_proc, fd, server_client_dispatch, c);
if (gettimeofday(&c->creation_time, NULL) != 0)
fatal("gettimeofday failed");
memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
c->environ = environ_create();
c->fd = -1;
c->cwd = NULL;
TAILQ_INIT(&c->queue);
c->stdin_data = evbuffer_new();
c->stdout_data = evbuffer_new();
c->stderr_data = evbuffer_new();
c->tty.fd = -1;
c->title = NULL;
c->session = NULL;
c->last_session = NULL;
c->tty.sx = 80;
c->tty.sy = 24;
screen_init(&c->status.status, c->tty.sx, 1, 0);
c->message_string = NULL;
TAILQ_INIT(&c->message_log);
c->prompt_string = NULL;
c->prompt_buffer = NULL;
c->prompt_index = 0;
c->flags |= CLIENT_FOCUSED;
c->keytable = key_bindings_get_table("root", 1);
c->keytable->references++;
evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
evtimer_set(&c->click_timer, server_client_click_timer, c);
TAILQ_INSERT_TAIL(&clients, c, entry);
log_debug("new client %p", c);
return (c);
}
/* Open client terminal if needed. */
int
server_client_open(struct client *c, char **cause)
{
if (c->flags & CLIENT_CONTROL)
return (0);
if (strcmp(c->ttyname, "/dev/tty") == 0) {
*cause = xstrdup("can't use /dev/tty");
return (-1);
}
if (!(c->flags & CLIENT_TERMINAL)) {
*cause = xstrdup("not a terminal");
return (-1);
}
if (tty_open(&c->tty, cause) != 0)
return (-1);
return (0);
}
/* Lost a client. */
void
server_client_lost(struct client *c)
{
struct message_entry *msg, *msg1;
c->flags |= CLIENT_DEAD;
server_client_clear_identify(c, NULL);
status_prompt_clear(c);
status_message_clear(c);
if (c->stdin_callback != NULL)
c->stdin_callback(c, 1, c->stdin_callback_data);
TAILQ_REMOVE(&clients, c, entry);
log_debug("lost client %p", c);
/*
* If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
* and tty_free might close an unrelated fd.
*/
if (c->flags & CLIENT_TERMINAL)
tty_free(&c->tty);
free(c->ttyname);
free(c->term);
evbuffer_free(c->stdin_data);
evbuffer_free(c->stdout_data);
if (c->stderr_data != c->stdout_data)
evbuffer_free(c->stderr_data);
if (event_initialized(&c->status.timer))
evtimer_del(&c->status.timer);
screen_free(&c->status.status);
if (c->status.old_status != NULL) {
screen_free(c->status.old_status);
free(c->status.old_status);
}
free(c->title);
free((void *)c->cwd);
evtimer_del(&c->repeat_timer);
evtimer_del(&c->click_timer);
key_bindings_unref_table(c->keytable);
if (event_initialized(&c->identify_timer))
evtimer_del(&c->identify_timer);
free(c->message_string);
if (event_initialized(&c->message_timer))
evtimer_del(&c->message_timer);
TAILQ_FOREACH_SAFE(msg, &c->message_log, entry, msg1) {
free(msg->msg);
TAILQ_REMOVE(&c->message_log, msg, entry);
free(msg);
}
free(c->prompt_string);
free(c->prompt_buffer);
format_lost_client(c);
environ_free(c->environ);
proc_remove_peer(c->peer);
c->peer = NULL;
server_client_unref(c);
server_add_accept(0); /* may be more file descriptors now */
recalculate_sizes();
server_check_unattached();
server_update_socket();
}
/* Remove reference from a client. */
void
server_client_unref(struct client *c)
{
log_debug("unref client %p (%d references)", c, c->references);
c->references--;
if (c->references == 0)
event_once(-1, EV_TIMEOUT, server_client_free, c, NULL);
}
/* Free dead client. */
static void
server_client_free(__unused int fd, __unused short events, void *arg)
{
struct client *c = arg;
log_debug("free client %p (%d references)", c, c->references);
if (!TAILQ_EMPTY(&c->queue))
fatalx("queue not empty");
if (c->references == 0) {
free((void *)c->name);
free(c);
}
}
/* Suspend a client. */
void
server_client_suspend(struct client *c)
{
struct session *s = c->session;
if (s == NULL || (c->flags & CLIENT_DETACHING))
return;
tty_stop_tty(&c->tty);
c->flags |= CLIENT_SUSPENDED;
proc_send(c->peer, MSG_SUSPEND, -1, NULL, 0);
}
/* Detach a client. */
void
server_client_detach(struct client *c, enum msgtype msgtype)
{
struct session *s = c->session;
if (s == NULL || (c->flags & CLIENT_DETACHING))
return;
c->flags |= CLIENT_DETACHING;
notify_client("client-detached", c);
proc_send(c->peer, msgtype, -1, s->name, strlen(s->name) + 1);
}
/* Execute command to replace a client. */
void
server_client_exec(struct client *c, const char *cmd)
{
struct session *s = c->session;
char *msg;
const char *shell;
size_t cmdsize, shellsize;
if (*cmd == '\0')
return;
cmdsize = strlen(cmd) + 1;
if (s != NULL)
shell = options_get_string(s->options, "default-shell");
else
shell = options_get_string(global_s_options, "default-shell");
shellsize = strlen(shell) + 1;
msg = xmalloc(cmdsize + shellsize);
memcpy(msg, cmd, cmdsize);
memcpy(msg + cmdsize, shell, shellsize);
proc_send(c->peer, MSG_EXEC, -1, msg, cmdsize + shellsize);
free(msg);
}
/* Check for mouse keys. */
static key_code
server_client_check_mouse(struct client *c)
{
struct session *s = c->session;
struct mouse_event *m = &c->tty.mouse;
struct window *w;
struct window_pane *wp;
u_int x, y, b, sx, sy;
int flag;
key_code key;
struct timeval tv;
enum { NOTYPE, MOVE, DOWN, UP, DRAG, WHEEL, DOUBLE, TRIPLE } type;
enum { NOWHERE, PANE, STATUS, BORDER } where;
type = NOTYPE;
where = NOWHERE;
log_debug("%s mouse %02x at %u,%u (last %u,%u) (%d)", c->name, m->b,
m->x, m->y, m->lx, m->ly, c->tty.mouse_drag_flag);
/* What type of event is this? */
if ((m->sgr_type != ' ' &&
MOUSE_DRAG(m->sgr_b) &&
MOUSE_BUTTONS(m->sgr_b) == 3) ||
(m->sgr_type == ' ' &&
MOUSE_DRAG(m->b) &&
MOUSE_BUTTONS(m->b) == 3 &&
MOUSE_BUTTONS(m->lb) == 3)) {
type = MOVE;
x = m->x, y = m->y, b = 0;
log_debug("move at %u,%u", x, y);
} else if (MOUSE_DRAG(m->b)) {
type = DRAG;
if (c->tty.mouse_drag_flag) {
x = m->x, y = m->y, b = m->b;
log_debug("drag update at %u,%u", x, y);
} else {
x = m->lx - m->ox, y = m->ly - m->oy, b = m->lb;
log_debug("drag start at %u,%u", x, y);
}
} else if (MOUSE_WHEEL(m->b)) {
type = WHEEL;
x = m->x, y = m->y, b = m->b;
log_debug("wheel at %u,%u", x, y);
} else if (MOUSE_RELEASE(m->b)) {
type = UP;
x = m->x, y = m->y, b = m->lb;
log_debug("up at %u,%u", x, y);
} else {
if (c->flags & CLIENT_DOUBLECLICK) {
evtimer_del(&c->click_timer);
c->flags &= ~CLIENT_DOUBLECLICK;
if (m->b == c->click_button) {
type = DOUBLE;
x = m->x, y = m->y, b = m->b;
log_debug("double-click at %u,%u", x, y);
flag = CLIENT_TRIPLECLICK;
goto add_timer;
}
} else if (c->flags & CLIENT_TRIPLECLICK) {
evtimer_del(&c->click_timer);
c->flags &= ~CLIENT_TRIPLECLICK;
if (m->b == c->click_button) {
type = TRIPLE;
x = m->x, y = m->y, b = m->b;
log_debug("triple-click at %u,%u", x, y);
goto have_event;
}
}
type = DOWN;
x = m->x, y = m->y, b = m->b;
log_debug("down at %u,%u", x, y);
flag = CLIENT_DOUBLECLICK;
add_timer:
if (KEYC_CLICK_TIMEOUT != 0) {
c->flags |= flag;
c->click_button = m->b;
tv.tv_sec = KEYC_CLICK_TIMEOUT / 1000;
tv.tv_usec = (KEYC_CLICK_TIMEOUT % 1000) * 1000L;
evtimer_del(&c->click_timer);
evtimer_add(&c->click_timer, &tv);
}
}
have_event:
if (type == NOTYPE)
return (KEYC_UNKNOWN);
/* Always save the session. */
m->s = s->id;
/* Is this on the status line? */
m->statusat = status_at_line(c);
if (m->statusat != -1 && y == (u_int)m->statusat) {
w = status_get_window_at(c, x);
if (w == NULL)
return (KEYC_UNKNOWN);
m->w = w->id;
where = STATUS;
} else
m->w = -1;
/* Not on status line. Adjust position and check for border or pane. */
if (where == NOWHERE) {
if (m->statusat == 0 && y > 0)
y--;
else if (m->statusat > 0 && y >= (u_int)m->statusat)
y = m->statusat - 1;
tty_window_offset(&c->tty, &m->ox, &m->oy, &sx, &sy);
log_debug("mouse window @%u at %u,%u (%ux%u)",
s->curw->window->id, m->ox, m->oy, sx, sy);
if (x > sx || y > sy)
return (KEYC_UNKNOWN);
x = m->x = x + m->ox;
y = m->y = y + m->oy;
TAILQ_FOREACH(wp, &s->curw->window->panes, entry) {
if ((wp->xoff + wp->sx == x &&
wp->yoff <= 1 + y &&
wp->yoff + wp->sy >= y) ||
(wp->yoff + wp->sy == y &&
wp->xoff <= 1 + x &&
wp->xoff + wp->sx >= x))
break;
}
if (wp != NULL)
where = BORDER;
else {
wp = window_get_active_at(s->curw->window, x, y);
if (wp != NULL) {
where = PANE;
log_debug("mouse at %u,%u is on pane %%%u",
x, y, wp->id);
}
}
if (where == NOWHERE)
return (KEYC_UNKNOWN);
m->wp = wp->id;
m->w = wp->window->id;
} else
m->wp = -1;
/* Stop dragging if needed. */
if (type != DRAG && type != WHEEL && c->tty.mouse_drag_flag) {
if (c->tty.mouse_drag_release != NULL)
c->tty.mouse_drag_release(c, m);
c->tty.mouse_drag_update = NULL;
c->tty.mouse_drag_release = NULL;
/*
* End a mouse drag by passing a MouseDragEnd key corresponding
* to the button that started the drag.
*/
switch (c->tty.mouse_drag_flag) {
case 1:
if (where == PANE)
key = KEYC_MOUSEDRAGEND1_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAGEND1_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDRAGEND1_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEDRAGEND2_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAGEND2_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDRAGEND2_BORDER;
break;
case 3:
if (where == PANE)
key = KEYC_MOUSEDRAGEND3_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAGEND3_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDRAGEND3_BORDER;
break;
default:
key = KEYC_MOUSE;
break;
}
c->tty.mouse_drag_flag = 0;
return (key);
}
/* Convert to a key binding. */
key = KEYC_UNKNOWN;
switch (type) {
case NOTYPE:
break;
case MOVE:
if (where == PANE)
key = KEYC_MOUSEMOVE_PANE;
if (where == STATUS)
key = KEYC_MOUSEMOVE_STATUS;
if (where == BORDER)
key = KEYC_MOUSEMOVE_BORDER;
break;
case DRAG:
if (c->tty.mouse_drag_update != NULL)
key = KEYC_DRAGGING;
else {
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_MOUSEDRAG1_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAG1_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDRAG1_BORDER;
break;
case 1:
if (where == PANE)
key = KEYC_MOUSEDRAG2_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAG2_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDRAG2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEDRAG3_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAG3_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDRAG3_BORDER;
break;
}
}
/*
* Begin a drag by setting the flag to a non-zero value that
* corresponds to the mouse button in use.
*/
c->tty.mouse_drag_flag = MOUSE_BUTTONS(b) + 1;
break;
case WHEEL:
if (MOUSE_BUTTONS(b) == MOUSE_WHEEL_UP) {
if (where == PANE)
key = KEYC_WHEELUP_PANE;
if (where == STATUS)
key = KEYC_WHEELUP_STATUS;
if (where == BORDER)
key = KEYC_WHEELUP_BORDER;
} else {
if (where == PANE)
key = KEYC_WHEELDOWN_PANE;
if (where == STATUS)
key = KEYC_WHEELDOWN_STATUS;
if (where == BORDER)
key = KEYC_WHEELDOWN_BORDER;
}
break;
case UP:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_MOUSEUP1_PANE;
if (where == STATUS)
key = KEYC_MOUSEUP1_STATUS;
if (where == BORDER)
key = KEYC_MOUSEUP1_BORDER;
break;
case 1:
if (where == PANE)
key = KEYC_MOUSEUP2_PANE;
if (where == STATUS)
key = KEYC_MOUSEUP2_STATUS;
if (where == BORDER)
key = KEYC_MOUSEUP2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEUP3_PANE;
if (where == STATUS)
key = KEYC_MOUSEUP3_STATUS;
if (where == BORDER)
key = KEYC_MOUSEUP3_BORDER;
break;
}
break;
case DOWN:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_MOUSEDOWN1_PANE;
if (where == STATUS)
key = KEYC_MOUSEDOWN1_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDOWN1_BORDER;
break;
case 1:
if (where == PANE)
key = KEYC_MOUSEDOWN2_PANE;
if (where == STATUS)
key = KEYC_MOUSEDOWN2_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDOWN2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEDOWN3_PANE;
if (where == STATUS)
key = KEYC_MOUSEDOWN3_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDOWN3_BORDER;
break;
}
break;
case DOUBLE:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_DOUBLECLICK1_PANE;
if (where == STATUS)
key = KEYC_DOUBLECLICK1_STATUS;
if (where == BORDER)
key = KEYC_DOUBLECLICK1_BORDER;
break;
case 1:
if (where == PANE)
key = KEYC_DOUBLECLICK2_PANE;
if (where == STATUS)
key = KEYC_DOUBLECLICK2_STATUS;
if (where == BORDER)
key = KEYC_DOUBLECLICK2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_DOUBLECLICK3_PANE;
if (where == STATUS)
key = KEYC_DOUBLECLICK3_STATUS;
if (where == BORDER)
key = KEYC_DOUBLECLICK3_BORDER;
break;
}
break;
case TRIPLE:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_TRIPLECLICK1_PANE;
if (where == STATUS)
key = KEYC_TRIPLECLICK1_STATUS;
if (where == BORDER)
key = KEYC_TRIPLECLICK1_BORDER;
break;
case 1:
if (where == PANE)
key = KEYC_TRIPLECLICK2_PANE;
if (where == STATUS)
key = KEYC_TRIPLECLICK2_STATUS;
if (where == BORDER)
key = KEYC_TRIPLECLICK2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_TRIPLECLICK3_PANE;
if (where == STATUS)
key = KEYC_TRIPLECLICK3_STATUS;
if (where == BORDER)
key = KEYC_TRIPLECLICK3_BORDER;
break;
}
break;
}
if (key == KEYC_UNKNOWN)
return (KEYC_UNKNOWN);
/* Apply modifiers if any. */
if (b & MOUSE_MASK_META)
key |= KEYC_ESCAPE;
if (b & MOUSE_MASK_CTRL)
key |= KEYC_CTRL;
if (b & MOUSE_MASK_SHIFT)
key |= KEYC_SHIFT;
return (key);
}
/* Is this fast enough to probably be a paste? */
static int
server_client_assume_paste(struct session *s)
{
struct timeval tv;
int t;
if ((t = options_get_number(s->options, "assume-paste-time")) == 0)
return (0);
timersub(&s->activity_time, &s->last_activity_time, &tv);
if (tv.tv_sec == 0 && tv.tv_usec < t * 1000) {
log_debug("session %s pasting (flag %d)", s->name,
!!(s->flags & SESSION_PASTING));
if (s->flags & SESSION_PASTING)
return (1);
s->flags |= SESSION_PASTING;
return (0);
}
log_debug("session %s not pasting", s->name);
s->flags &= ~SESSION_PASTING;
return (0);
}
/* Handle data key input from client. */
void
server_client_handle_key(struct client *c, key_code key)
{
struct mouse_event *m = &c->tty.mouse;
struct session *s = c->session;
struct window *w;
struct window_pane *wp;
struct timeval tv;
struct key_table *table, *first;
struct key_binding *bd;
int xtimeout, flags;
struct cmd_find_state fs;
key_code key0;
/* Check the client is good to accept input. */
if (s == NULL || (c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
return;
w = s->curw->window;
/* Update the activity timer. */
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday failed");
session_update_activity(s, &c->activity_time);
/* Number keys jump to pane in identify mode. */
if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
if (c->flags & CLIENT_READONLY)
return;
window_unzoom(w);
wp = window_pane_at_index(w, key - '0');
server_client_clear_identify(c, wp);
return;
}
/* Handle status line. */
if (!(c->flags & CLIENT_READONLY)) {
status_message_clear(c);
server_client_clear_identify(c, NULL);
}
if (c->prompt_string != NULL) {
if (c->flags & CLIENT_READONLY)
return;
if (status_prompt_key(c, key) == 0)
return;
}
/* Check for mouse keys. */
m->valid = 0;
if (key == KEYC_MOUSE) {
if (c->flags & CLIENT_READONLY)
return;
key = server_client_check_mouse(c);
if (key == KEYC_UNKNOWN)
return;
m->valid = 1;
m->key = key;
/*
* Mouse drag is in progress, so fire the callback (now that
* the mouse event is valid).
*/
if (key == KEYC_DRAGGING) {
c->tty.mouse_drag_update(c, m);
return;
}
} else
m->valid = 0;
/* Find affected pane. */
if (!KEYC_IS_MOUSE(key) || cmd_find_from_mouse(&fs, m, 0) != 0)
cmd_find_from_session(&fs, s, 0);
wp = fs.wp;
/* Forward mouse keys if disabled. */
if (KEYC_IS_MOUSE(key) && !options_get_number(s->options, "mouse"))
goto forward_key;
/* Treat everything as a regular key when pasting is detected. */
if (!KEYC_IS_MOUSE(key) && server_client_assume_paste(s))
goto forward_key;
/*
* Work out the current key table. If the pane is in a mode, use
* the mode table instead of the default key table.
*/
if (server_client_is_default_key_table(c, c->keytable) &&
wp != NULL &&
wp->mode != NULL &&
wp->mode->key_table != NULL)
table = key_bindings_get_table(wp->mode->key_table(wp), 1);
else
table = c->keytable;
first = table;
table_changed:
/*
* The prefix always takes precedence and forces a switch to the prefix
* table, unless we are already there.
*/
key0 = (key & ~KEYC_XTERM);
if ((key0 == (key_code)options_get_number(s->options, "prefix") ||
key0 == (key_code)options_get_number(s->options, "prefix2")) &&
strcmp(table->name, "prefix") != 0) {
server_client_set_key_table(c, "prefix");
server_status_client(c);
return;
}
flags = c->flags;
/* Log key table. */
if (wp == NULL)
log_debug("key table %s (no pane)", table->name);
else
log_debug("key table %s (pane %%%u)", table->name, wp->id);
if (c->flags & CLIENT_REPEAT)
log_debug("currently repeating");
try_again:
/* Try to see if there is a key binding in the current table. */
bd = key_bindings_get(table, key0);
if (bd != NULL) {
/*
* Key was matched in this table. If currently repeating but a
* non-repeating binding was found, stop repeating and try
* again in the root table.
*/
if ((c->flags & CLIENT_REPEAT) &&
(~bd->flags & KEY_BINDING_REPEAT)) {
server_client_set_key_table(c, NULL);
c->flags &= ~CLIENT_REPEAT;
server_status_client(c);
table = c->keytable;
goto table_changed;
}
log_debug("found in key table %s", table->name);
/*
* Take a reference to this table to make sure the key binding
* doesn't disappear.
*/
table->references++;
/*
* If this is a repeating key, start the timer. Otherwise reset
* the client back to the root table.
*/
xtimeout = options_get_number(s->options, "repeat-time");
if (xtimeout != 0 && (bd->flags & KEY_BINDING_REPEAT)) {
c->flags |= CLIENT_REPEAT;
tv.tv_sec = xtimeout / 1000;
tv.tv_usec = (xtimeout % 1000) * 1000L;
evtimer_del(&c->repeat_timer);
evtimer_add(&c->repeat_timer, &tv);
} else {
c->flags &= ~CLIENT_REPEAT;
server_client_set_key_table(c, NULL);
}
server_status_client(c);
/* Execute the key binding. */
key_bindings_dispatch(bd, NULL, c, m, &fs);
key_bindings_unref_table(table);
return;
}
/*
* No match, try the ANY key.
*/
if (key0 != KEYC_ANY) {
key0 = KEYC_ANY;
goto try_again;
}
/*
* No match in this table. If not in the root table or if repeating,
* switch the client back to the root table and try again.
*/
log_debug("not found in key table %s", table->name);
if (!server_client_is_default_key_table(c, table) ||
(c->flags & CLIENT_REPEAT)) {
server_client_set_key_table(c, NULL);
c->flags &= ~CLIENT_REPEAT;
server_status_client(c);
table = c->keytable;
goto table_changed;
}
/*
* No match in the root table either. If this wasn't the first table
* tried, don't pass the key to the pane.
*/
if (first != table && (~flags & CLIENT_REPEAT)) {
server_client_set_key_table(c, NULL);
server_status_client(c);
return;
}
forward_key:
if (c->flags & CLIENT_READONLY)
return;
if (wp != NULL)
window_pane_key(wp, c, s, key, m);
}
/* Client functions that need to happen every loop. */
void
server_client_loop(void)
{
struct client *c;
struct window *w;
struct window_pane *wp;
int focus;
TAILQ_FOREACH(c, &clients, entry) {
server_client_check_exit(c);
if (c->session != NULL) {
server_client_check_redraw(c);
server_client_reset_state(c);
}
}
/*
* Any windows will have been redrawn as part of clients, so clear
* their flags now. Also check pane focus and resize.
*/
focus = options_get_number(global_options, "focus-events");
RB_FOREACH(w, windows, &windows) {
TAILQ_FOREACH(wp, &w->panes, entry) {
if (wp->fd != -1) {
if (focus)
server_client_check_focus(wp);
server_client_check_resize(wp);
}
wp->flags &= ~PANE_REDRAW;
}
check_window_name(w);
}
}
/* Check if we need to force a resize. */
static int
server_client_resize_force(struct window_pane *wp)
{
struct timeval tv = { .tv_usec = 100000 };
struct winsize ws;
/*
* If we are resizing to the same size as when we entered the loop
* (that is, to the same size the application currently thinks it is),
* tmux may have gone through several resizes internally and thrown
* away parts of the screen. So we need the application to actually
* redraw even though its final size has not changed.
*/
if (wp->flags & PANE_RESIZEFORCE) {
wp->flags &= ~PANE_RESIZEFORCE;
return (0);
}
if (wp->sx != wp->osx ||
wp->sy != wp->osy ||
wp->sx <= 1 ||
wp->sy <= 1)
return (0);
memset(&ws, 0, sizeof ws);
ws.ws_col = wp->sx;
ws.ws_row = wp->sy - 1;
if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
#ifdef __sun
if (errno != EINVAL && errno != ENXIO)
#endif
fatal("ioctl failed");
log_debug("%s: %%%u forcing resize", __func__, wp->id);
evtimer_add(&wp->resize_timer, &tv);
wp->flags |= PANE_RESIZEFORCE;
return (1);
}
/* Resize timer event. */
static void
server_client_resize_event(__unused int fd, __unused short events, void *data)
{
struct window_pane *wp = data;
struct winsize ws;
evtimer_del(&wp->resize_timer);
if (!(wp->flags & PANE_RESIZE))
return;
if (server_client_resize_force(wp))
return;
memset(&ws, 0, sizeof ws);
ws.ws_col = wp->sx;
ws.ws_row = wp->sy;
if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
#ifdef __sun
/*
* Some versions of Solaris apparently can return an error when
* resizing; don't know why this happens, can't reproduce on
* other platforms and ignoring it doesn't seem to cause any
* issues.
*/
if (errno != EINVAL && errno != ENXIO)
#endif
fatal("ioctl failed");
log_debug("%s: %%%u resize to %u,%u", __func__, wp->id, wp->sx, wp->sy);
wp->flags &= ~PANE_RESIZE;
wp->osx = wp->sx;
wp->osy = wp->sy;
}
/* Check if pane should be resized. */
static void
server_client_check_resize(struct window_pane *wp)
{
struct timeval tv = { .tv_usec = 250000 };
if (!(wp->flags & PANE_RESIZE))
return;
log_debug("%s: %%%u resize to %u,%u", __func__, wp->id, wp->sx, wp->sy);
if (!event_initialized(&wp->resize_timer))
evtimer_set(&wp->resize_timer, server_client_resize_event, wp);
/*
* The first resize should happen immediately, so if the timer is not
* running, do it now.
*/
if (!evtimer_pending(&wp->resize_timer, NULL))
server_client_resize_event(-1, 0, wp);
/*
* If the pane is in the alternate screen, let the timer expire and
* resize to give the application a chance to redraw. If not, keep
* pushing the timer back.
*/
if (wp->saved_grid != NULL && evtimer_pending(&wp->resize_timer, NULL))
return;
evtimer_del(&wp->resize_timer);
evtimer_add(&wp->resize_timer, &tv);
}
/* Check whether pane should be focused. */
static void
server_client_check_focus(struct window_pane *wp)
{
struct client *c;
int push;
/* Do we need to push the focus state? */
push = wp->flags & PANE_FOCUSPUSH;
wp->flags &= ~PANE_FOCUSPUSH;
/* If we're not the active pane in our window, we're not focused. */
if (wp->window->active != wp)
goto not_focused;
/* If we're in a mode, we're not focused. */
if (wp->screen != &wp->base)
goto not_focused;
/*
* If our window is the current window in any focused clients with an
* attached session, we're focused.
*/
TAILQ_FOREACH(c, &clients, entry) {
if (c->session == NULL || !(c->flags & CLIENT_FOCUSED))
continue;
if (c->session->attached == 0)
continue;
if (c->session->curw->window == wp->window)
goto focused;
}
not_focused:
if (push || (wp->flags & PANE_FOCUSED)) {
if (wp->base.mode & MODE_FOCUSON)
bufferevent_write(wp->event, "\033[O", 3);
notify_pane("pane-focus-out", wp);
}
wp->flags &= ~PANE_FOCUSED;
return;
focused:
if (push || !(wp->flags & PANE_FOCUSED)) {
if (wp->base.mode & MODE_FOCUSON)
bufferevent_write(wp->event, "\033[I", 3);
notify_pane("pane-focus-in", wp);
}
wp->flags |= PANE_FOCUSED;
}
/*
* Update cursor position and mode settings. The scroll region and attributes
* are cleared when idle (waiting for an event) as this is the most likely time
* a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
* compromise between excessive resets and likelihood of an interrupt.
*
* tty_region/tty_reset/tty_update_mode already take care of not resetting
* things that are already in their default state.
*/
static void
server_client_reset_state(struct client *c)
{
struct window *w = c->session->curw->window;
struct window_pane *wp = w->active, *loop;
struct screen *s = wp->screen;
struct options *oo = c->session->options;
int mode, cursor = 0;
u_int cx = 0, cy = 0, ox, oy, sx, sy;
if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
return;
mode = s->mode;
tty_region_off(&c->tty);
tty_margin_off(&c->tty);
/* Move cursor to pane cursor and offset. */
cursor = 0;
tty_window_offset(&c->tty, &ox, &oy, &sx, &sy);
if (wp->xoff + s->cx >= ox && wp->xoff + s->cx <= ox + sx &&
wp->yoff + s->cy >= oy && wp->yoff + s->cy <= oy + sy) {
cursor = 1;
cx = wp->xoff + s->cx - ox;
cy = wp->yoff + s->cy - oy;
if (status_at_line(c) == 0)
cy += status_line_size(c->session);
}
if (!cursor)
mode &= ~MODE_CURSOR;
tty_cursor(&c->tty, cx, cy);
/*
* Set mouse mode if requested. To support dragging, always use button
* mode.
*/
if (options_get_number(oo, "mouse")) {
mode &= ~ALL_MOUSE_MODES;
TAILQ_FOREACH(loop, &w->panes, entry) {
if (loop->screen->mode & MODE_MOUSE_ALL)
mode |= MODE_MOUSE_ALL;
}
if (~mode & MODE_MOUSE_ALL)
mode |= MODE_MOUSE_BUTTON;
}
/* Clear bracketed paste mode if at the prompt. */
if (c->prompt_string != NULL)
mode &= ~MODE_BRACKETPASTE;
/* Set the terminal mode and reset attributes. */
tty_update_mode(&c->tty, mode, s);
tty_reset(&c->tty);
}
/* Repeat time callback. */
static void
server_client_repeat_timer(__unused int fd, __unused short events, void *data)
{
struct client *c = data;
if (c->flags & CLIENT_REPEAT) {
server_client_set_key_table(c, NULL);
c->flags &= ~CLIENT_REPEAT;
server_status_client(c);
}
}
/* Double-click callback. */
static void
server_client_click_timer(__unused int fd, __unused short events, void *data)
{
struct client *c = data;
c->flags &= ~(CLIENT_DOUBLECLICK|CLIENT_TRIPLECLICK);
}
/* Check if client should be exited. */
static void
server_client_check_exit(struct client *c)
{
if (!(c->flags & CLIENT_EXIT))
return;
if (EVBUFFER_LENGTH(c->stdin_data) != 0)
return;
if (EVBUFFER_LENGTH(c->stdout_data) != 0)
return;
if (EVBUFFER_LENGTH(c->stderr_data) != 0)
return;
if (c->flags & CLIENT_ATTACHED)
notify_client("client-detached", c);
proc_send(c->peer, MSG_EXIT, -1, &c->retval, sizeof c->retval);
c->flags &= ~CLIENT_EXIT;
}
/* Redraw timer callback. */
static void
server_client_redraw_timer(__unused int fd, __unused short events,
__unused void* data)
{
log_debug("redraw timer fired");
}
/* Check for client redraws. */
static void
server_client_check_redraw(struct client *c)
{
struct session *s = c->session;
struct tty *tty = &c->tty;
struct window_pane *wp;
int needed, flags;
struct timeval tv = { .tv_usec = 1000 };
static struct event ev;
size_t left;
if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
return;
if (c->flags & CLIENT_ALLREDRAWFLAGS) {
log_debug("%s: redraw%s%s%s", c->name,
(c->flags & CLIENT_REDRAWWINDOW) ? " window" : "",
(c->flags & CLIENT_REDRAWSTATUS) ? " status" : "",
(c->flags & CLIENT_REDRAWBORDERS) ? " borders" : "");
}
/*
* If there is outstanding data, defer the redraw until it has been
* consumed. We can just add a timer to get out of the event loop and
* end up back here.
*/
needed = 0;
if (c->flags & CLIENT_ALLREDRAWFLAGS)
needed = 1;
else {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
if (wp->flags & PANE_REDRAW) {
needed = 1;
break;
}
}
}
if (needed && (left = EVBUFFER_LENGTH(tty->out)) != 0) {
log_debug("%s: redraw deferred (%zu left)", c->name, left);
if (!evtimer_initialized(&ev))
evtimer_set(&ev, server_client_redraw_timer, NULL);
if (!evtimer_pending(&ev, NULL)) {
log_debug("redraw timer started");
evtimer_add(&ev, &tv);
}
/*
* We may have got here for a single pane redraw, but force a
* full redraw next time in case other panes have been updated.
*/
c->flags |= CLIENT_ALLREDRAWFLAGS;
return;
} else if (needed)
log_debug("%s: redraw needed", c->name);
flags = tty->flags & (TTY_BLOCK|TTY_FREEZE|TTY_NOCURSOR);
tty->flags = (tty->flags & ~(TTY_BLOCK|TTY_FREEZE)) | TTY_NOCURSOR;
if (~c->flags & CLIENT_REDRAWWINDOW) {
/*
* If not redrawing the entire window, check whether each pane
* needs to be redrawn.
*/
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
if (wp->flags & PANE_REDRAW) {
tty_update_mode(tty, tty->mode, NULL);
screen_redraw_pane(c, wp);
}
}
}
if (c->flags & CLIENT_ALLREDRAWFLAGS) {
if (options_get_number(s->options, "set-titles"))
server_client_set_title(c);
screen_redraw_screen(c);
}
tty->flags = (tty->flags & ~(TTY_FREEZE|TTY_NOCURSOR)) | flags;
tty_update_mode(tty, tty->mode, NULL);
c->flags &= ~(CLIENT_ALLREDRAWFLAGS|CLIENT_STATUSFORCE);
if (needed) {
/*
* We would have deferred the redraw unless the output buffer
* was empty, so we can record how many bytes the redraw
* generated.
*/
c->redraw = EVBUFFER_LENGTH(tty->out);
log_debug("%s: redraw added %zu bytes", c->name, c->redraw);
}
}
/* Set client title. */
static void
server_client_set_title(struct client *c)
{
struct session *s = c->session;
const char *template;
char *title;
struct format_tree *ft;
template = options_get_string(s->options, "set-titles-string");
ft = format_create(c, NULL, FORMAT_NONE, 0);
format_defaults(ft, c, NULL, NULL, NULL);
title = format_expand_time(ft, template, time(NULL));
if (c->title == NULL || strcmp(title, c->title) != 0) {
free(c->title);
c->title = xstrdup(title);
tty_set_title(&c->tty, c->title);
}
free(title);
format_free(ft);
}
/* Dispatch message from client. */
static void
server_client_dispatch(struct imsg *imsg, void *arg)
{
struct client *c = arg;
struct msg_stdin_data stdindata;
const char *data;
ssize_t datalen;
struct session *s;
if (c->flags & CLIENT_DEAD)
return;
if (imsg == NULL) {
server_client_lost(c);
return;
}
data = imsg->data;
datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
switch (imsg->hdr.type) {
case MSG_IDENTIFY_FLAGS:
case MSG_IDENTIFY_TERM:
case MSG_IDENTIFY_TTYNAME:
case MSG_IDENTIFY_CWD:
case MSG_IDENTIFY_STDIN:
case MSG_IDENTIFY_ENVIRON:
case MSG_IDENTIFY_CLIENTPID:
case MSG_IDENTIFY_DONE:
server_client_dispatch_identify(c, imsg);
break;
case MSG_COMMAND:
server_client_dispatch_command(c, imsg);
break;
case MSG_STDIN:
if (datalen != sizeof stdindata)
fatalx("bad MSG_STDIN size");
memcpy(&stdindata, data, sizeof stdindata);
if (c->stdin_callback == NULL)
break;
if (stdindata.size <= 0)
c->stdin_closed = 1;
else {
evbuffer_add(c->stdin_data, stdindata.data,
stdindata.size);
}
c->stdin_callback(c, c->stdin_closed,
c->stdin_callback_data);
break;
case MSG_RESIZE:
if (datalen != 0)
fatalx("bad MSG_RESIZE size");
if (c->flags & CLIENT_CONTROL)
break;
tty_resize(&c->tty);
recalculate_sizes();
server_redraw_client(c);
if (c->session != NULL)
notify_client("client-resized", c);
break;
case MSG_EXITING:
if (datalen != 0)
fatalx("bad MSG_EXITING size");
c->session = NULL;
tty_close(&c->tty);
proc_send(c->peer, MSG_EXITED, -1, NULL, 0);
break;
case MSG_WAKEUP:
case MSG_UNLOCK:
if (datalen != 0)
fatalx("bad MSG_WAKEUP size");
if (!(c->flags & CLIENT_SUSPENDED))
break;
c->flags &= ~CLIENT_SUSPENDED;
if (c->tty.fd == -1) /* exited in the meantime */
break;
s = c->session;
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday failed");
tty_start_tty(&c->tty);
server_redraw_client(c);
recalculate_sizes();
if (s != NULL)
session_update_activity(s, &c->activity_time);
break;
case MSG_SHELL:
if (datalen != 0)
fatalx("bad MSG_SHELL size");
server_client_dispatch_shell(c);
break;
}
}
/* Callback when command is done. */
static enum cmd_retval
server_client_command_done(struct cmdq_item *item, __unused void *data)
{
struct client *c = item->client;
if (~c->flags & CLIENT_ATTACHED)
c->flags |= CLIENT_EXIT;
return (CMD_RETURN_NORMAL);
}
/* Show an error message. */
static enum cmd_retval
server_client_command_error(struct cmdq_item *item, void *data)
{
char *error = data;
cmdq_error(item, "%s", error);
free(error);
return (CMD_RETURN_NORMAL);
}
/* Handle command message. */
static void
server_client_dispatch_command(struct client *c, struct imsg *imsg)
{
struct msg_command_data data;
char *buf;
size_t len;
struct cmd_list *cmdlist = NULL;
int argc;
char **argv, *cause;
if (c->flags & CLIENT_EXIT)
return;
if (imsg->hdr.len - IMSG_HEADER_SIZE < sizeof data)
fatalx("bad MSG_COMMAND size");
memcpy(&data, imsg->data, sizeof data);
buf = (char *)imsg->data + sizeof data;
len = imsg->hdr.len - IMSG_HEADER_SIZE - sizeof data;
if (len > 0 && buf[len - 1] != '\0')
fatalx("bad MSG_COMMAND string");
argc = data.argc;
if (cmd_unpack_argv(buf, len, argc, &argv) != 0) {
cause = xstrdup("command too long");
goto error;
}
if (argc == 0) {
argc = 1;
argv = xcalloc(1, sizeof *argv);
*argv = xstrdup("new-session");
}
if ((cmdlist = cmd_list_parse(argc, argv, NULL, 0, &cause)) == NULL) {
cmd_free_argv(argc, argv);
goto error;
}
cmd_free_argv(argc, argv);
cmdq_append(c, cmdq_get_command(cmdlist, NULL, NULL, 0));
cmdq_append(c, cmdq_get_callback(server_client_command_done, NULL));
cmd_list_free(cmdlist);
return;
error:
cmdq_append(c, cmdq_get_callback(server_client_command_error, cause));
if (cmdlist != NULL)
cmd_list_free(cmdlist);
c->flags |= CLIENT_EXIT;
}
/* Handle identify message. */
static void
server_client_dispatch_identify(struct client *c, struct imsg *imsg)
{
const char *data, *home;
size_t datalen;
int flags;
char *name;
if (c->flags & CLIENT_IDENTIFIED)
fatalx("out-of-order identify message");
data = imsg->data;
datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
switch (imsg->hdr.type) {
case MSG_IDENTIFY_FLAGS:
if (datalen != sizeof flags)
fatalx("bad MSG_IDENTIFY_FLAGS size");
memcpy(&flags, data, sizeof flags);
c->flags |= flags;
log_debug("client %p IDENTIFY_FLAGS %#x", c, flags);
break;
case MSG_IDENTIFY_TERM:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_TERM string");
c->term = xstrdup(data);
log_debug("client %p IDENTIFY_TERM %s", c, data);
break;
case MSG_IDENTIFY_TTYNAME:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_TTYNAME string");
c->ttyname = xstrdup(data);
log_debug("client %p IDENTIFY_TTYNAME %s", c, data);
break;
case MSG_IDENTIFY_CWD:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_CWD string");
if (access(data, X_OK) == 0)
c->cwd = xstrdup(data);
else if ((home = find_home()) != NULL)
c->cwd = xstrdup(home);
else
c->cwd = xstrdup("/");
log_debug("client %p IDENTIFY_CWD %s", c, data);
break;
case MSG_IDENTIFY_STDIN:
if (datalen != 0)
fatalx("bad MSG_IDENTIFY_STDIN size");
c->fd = imsg->fd;
log_debug("client %p IDENTIFY_STDIN %d", c, imsg->fd);
break;
case MSG_IDENTIFY_ENVIRON:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_ENVIRON string");
if (strchr(data, '=') != NULL)
environ_put(c->environ, data);
log_debug("client %p IDENTIFY_ENVIRON %s", c, data);
break;
case MSG_IDENTIFY_CLIENTPID:
if (datalen != sizeof c->pid)
fatalx("bad MSG_IDENTIFY_CLIENTPID size");
memcpy(&c->pid, data, sizeof c->pid);
log_debug("client %p IDENTIFY_CLIENTPID %ld", c, (long)c->pid);
break;
default:
break;
}
if (imsg->hdr.type != MSG_IDENTIFY_DONE)
return;
c->flags |= CLIENT_IDENTIFIED;
if (*c->ttyname != '\0')
name = xstrdup(c->ttyname);
else
xasprintf(&name, "client-%ld", (long)c->pid);
c->name = name;
log_debug("client %p name is %s", c, c->name);
#ifdef __CYGWIN__
c->fd = open(c->ttyname, O_RDWR|O_NOCTTY);
#endif
if (c->flags & CLIENT_CONTROL) {
c->stdin_callback = control_callback;
evbuffer_free(c->stderr_data);
c->stderr_data = c->stdout_data;
if (c->flags & CLIENT_CONTROLCONTROL)
evbuffer_add_printf(c->stdout_data, "\033P1000p");
proc_send(c->peer, MSG_STDIN, -1, NULL, 0);
c->tty.fd = -1;
close(c->fd);
c->fd = -1;
return;
}
if (c->fd == -1)
return;
if (tty_init(&c->tty, c, c->fd, c->term) != 0) {
close(c->fd);
c->fd = -1;
return;
}
if (c->flags & CLIENT_UTF8)
c->tty.flags |= TTY_UTF8;
if (c->flags & CLIENT_256COLOURS)
c->tty.term_flags |= TERM_256COLOURS;
tty_resize(&c->tty);
if (!(c->flags & CLIENT_CONTROL))
c->flags |= CLIENT_TERMINAL;
}
/* Handle shell message. */
static void
server_client_dispatch_shell(struct client *c)
{
const char *shell;
shell = options_get_string(global_s_options, "default-shell");
if (*shell == '\0' || areshell(shell))
shell = _PATH_BSHELL;
proc_send(c->peer, MSG_SHELL, -1, shell, strlen(shell) + 1);
proc_kill_peer(c->peer);
}
/* Event callback to push more stdout data if any left. */
static void
server_client_stdout_cb(__unused int fd, __unused short events, void *arg)
{
struct client *c = arg;
if (~c->flags & CLIENT_DEAD)
server_client_push_stdout(c);
server_client_unref(c);
}
/* Push stdout to client if possible. */
void
server_client_push_stdout(struct client *c)
{
struct msg_stdout_data data;
size_t sent, left;
left = EVBUFFER_LENGTH(c->stdout_data);
while (left != 0) {
sent = left;
if (sent > sizeof data.data)
sent = sizeof data.data;
memcpy(data.data, EVBUFFER_DATA(c->stdout_data), sent);
data.size = sent;
if (proc_send(c->peer, MSG_STDOUT, -1, &data, sizeof data) != 0)
break;
evbuffer_drain(c->stdout_data, sent);
left = EVBUFFER_LENGTH(c->stdout_data);
log_debug("%s: client %p, sent %zu, left %zu", __func__, c,
sent, left);
}
if (left != 0) {
c->references++;
event_once(-1, EV_TIMEOUT, server_client_stdout_cb, c, NULL);
log_debug("%s: client %p, queued", __func__, c);
}
}
/* Event callback to push more stderr data if any left. */
static void
server_client_stderr_cb(__unused int fd, __unused short events, void *arg)
{
struct client *c = arg;
if (~c->flags & CLIENT_DEAD)
server_client_push_stderr(c);
server_client_unref(c);
}
/* Push stderr to client if possible. */
void
server_client_push_stderr(struct client *c)
{
struct msg_stderr_data data;
size_t sent, left;
if (c->stderr_data == c->stdout_data) {
server_client_push_stdout(c);
return;
}
left = EVBUFFER_LENGTH(c->stderr_data);
while (left != 0) {
sent = left;
if (sent > sizeof data.data)
sent = sizeof data.data;
memcpy(data.data, EVBUFFER_DATA(c->stderr_data), sent);
data.size = sent;
if (proc_send(c->peer, MSG_STDERR, -1, &data, sizeof data) != 0)
break;
evbuffer_drain(c->stderr_data, sent);
left = EVBUFFER_LENGTH(c->stderr_data);
log_debug("%s: client %p, sent %zu, left %zu", __func__, c,
sent, left);
}
if (left != 0) {
c->references++;
event_once(-1, EV_TIMEOUT, server_client_stderr_cb, c, NULL);
log_debug("%s: client %p, queued", __func__, c);
}
}
/* Add to client message log. */
void
server_client_add_message(struct client *c, const char *fmt, ...)
{
struct message_entry *msg, *msg1;
char *s;
va_list ap;
u_int limit;
va_start(ap, fmt);
xvasprintf(&s, fmt, ap);
va_end(ap);
log_debug("message %s (client %p)", s, c);
msg = xcalloc(1, sizeof *msg);
msg->msg_time = time(NULL);
msg->msg_num = c->message_next++;
msg->msg = s;
TAILQ_INSERT_TAIL(&c->message_log, msg, entry);
limit = options_get_number(global_options, "message-limit");
TAILQ_FOREACH_SAFE(msg, &c->message_log, entry, msg1) {
if (msg->msg_num + limit >= c->message_next)
break;
free(msg->msg);
TAILQ_REMOVE(&c->message_log, msg, entry);
free(msg);
}
}
/* Get client working directory. */
const char *
server_client_get_cwd(struct client *c, struct session *s)
{
const char *home;
if (c != NULL && c->session == NULL && c->cwd != NULL)
return (c->cwd);
if (s != NULL && s->cwd != NULL)
return (s->cwd);
if (c != NULL && (s = c->session) != NULL && s->cwd != NULL)
return (s->cwd);
if ((home = find_home()) != NULL)
return (home);
return ("/");
}
/* Resolve an absolute path or relative to client working directory. */
char *
server_client_get_path(struct client *c, const char *file)
{
char *path, resolved[PATH_MAX];
if (*file == '/')
path = xstrdup(file);
else
xasprintf(&path, "%s/%s", server_client_get_cwd(c, NULL), file);
if (realpath(path, resolved) == NULL)
return (path);
free(path);
return (xstrdup(resolved));
}
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