tmux/server-client.c

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/* $Id$ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
* 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>
2013-04-10 11:52:40 +00:00
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
void server_client_check_focus(struct window_pane *);
void server_client_check_resize(struct window_pane *);
void server_client_check_mouse(struct client *, struct window_pane *);
void server_client_repeat_timer(int, short, void *);
void server_client_check_exit(struct client *);
void server_client_check_redraw(struct client *);
void server_client_set_title(struct client *);
void server_client_reset_state(struct client *);
int server_client_assume_paste(struct session *);
int server_client_msg_dispatch(struct client *);
void server_client_msg_command(struct client *, struct imsg *);
void server_client_msg_identify(struct client *, struct imsg *);
void server_client_msg_shell(struct client *);
/* Create a new client. */
void
server_client_create(int fd)
{
struct client *c;
u_int i;
setblocking(fd, 0);
c = xcalloc(1, sizeof *c);
c->references = 0;
imsg_init(&c->ibuf, fd);
server_update_event(c);
if (gettimeofday(&c->creation_time, NULL) != 0)
fatal("gettimeofday failed");
memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
environ_init(&c->environ);
c->cmdq = cmdq_new(c);
c->cmdq->client_exit = 1;
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, c->tty.sx, 1, 0);
RB_INIT(&c->status_new);
RB_INIT(&c->status_old);
c->message_string = NULL;
ARRAY_INIT(&c->message_log);
c->prompt_string = NULL;
c->prompt_buffer = NULL;
c->prompt_index = 0;
c->tty.mouse.xb = c->tty.mouse.button = 3;
c->tty.mouse.x = c->tty.mouse.y = -1;
c->tty.mouse.lx = c->tty.mouse.ly = -1;
c->tty.mouse.sx = c->tty.mouse.sy = -1;
c->tty.mouse.event = MOUSE_EVENT_UP;
c->tty.mouse.flags = 0;
c->flags |= CLIENT_FOCUSED;
evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) == NULL) {
ARRAY_SET(&clients, i, c);
return;
}
}
ARRAY_ADD(&clients, c);
log_debug("new client %d", fd);
}
/* Open client terminal if needed. */
int
server_client_open(struct client *c, struct session *s, char **cause)
{
struct options *oo = s != NULL ? &s->options : &global_s_options;
char *overrides;
if (c->flags & CLIENT_CONTROL)
return (0);
if (!(c->flags & CLIENT_TERMINAL)) {
*cause = xstrdup ("not a terminal");
return (-1);
}
overrides = options_get_string(oo, "terminal-overrides");
if (tty_open(&c->tty, overrides, cause) != 0)
return (-1);
return (0);
}
/* Lost a client. */
void
server_client_lost(struct client *c)
{
struct message_entry *msg;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) == c)
ARRAY_SET(&clients, i, NULL);
}
log_debug("lost client %d", c->ibuf.fd);
/*
* 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);
status_free_jobs(&c->status_new);
status_free_jobs(&c->status_old);
screen_free(&c->status);
free(c->title);
close(c->cwd);
evtimer_del(&c->repeat_timer);
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);
for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
msg = &ARRAY_ITEM(&c->message_log, i);
free(msg->msg);
}
ARRAY_FREE(&c->message_log);
free(c->prompt_string);
free(c->prompt_buffer);
c->cmdq->dead = 1;
cmdq_free(c->cmdq);
c->cmdq = NULL;
environ_free(&c->environ);
close(c->ibuf.fd);
imsg_clear(&c->ibuf);
if (event_initialized(&c->event))
event_del(&c->event);
for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
if (ARRAY_ITEM(&dead_clients, i) == NULL) {
ARRAY_SET(&dead_clients, i, c);
break;
}
}
if (i == ARRAY_LENGTH(&dead_clients))
ARRAY_ADD(&dead_clients, c);
c->flags |= CLIENT_DEAD;
server_add_accept(0); /* may be more file descriptors now */
recalculate_sizes();
server_check_unattached();
server_update_socket();
}
/* Process a single client event. */
void
server_client_callback(int fd, short events, void *data)
{
struct client *c = data;
if (c->flags & CLIENT_DEAD)
return;
if (fd == c->ibuf.fd) {
if (events & EV_WRITE && msgbuf_write(&c->ibuf.w) < 0)
goto client_lost;
if (c->flags & CLIENT_BAD) {
if (c->ibuf.w.queued == 0)
goto client_lost;
return;
}
if (events & EV_READ && server_client_msg_dispatch(c) != 0)
goto client_lost;
}
server_push_stdout(c);
server_push_stderr(c);
server_update_event(c);
return;
client_lost:
server_client_lost(c);
}
/* Handle client status timer. */
void
server_client_status_timer(void)
{
struct client *c;
struct session *s;
struct timeval tv;
u_int i;
int interval;
time_t difference;
if (gettimeofday(&tv, NULL) != 0)
fatal("gettimeofday failed");
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (c->message_string != NULL || c->prompt_string != NULL) {
/*
* Don't need timed redraw for messages/prompts so bail
* now. The status timer isn't reset when they are
* redrawn anyway.
*/
continue;
}
s = c->session;
if (!options_get_number(&s->options, "status"))
continue;
interval = options_get_number(&s->options, "status-interval");
difference = tv.tv_sec - c->status_timer.tv_sec;
if (difference >= interval) {
status_update_jobs(c);
c->flags |= CLIENT_STATUS;
}
}
}
/* Check for mouse keys. */
void
server_client_check_mouse(struct client *c, struct window_pane *wp)
{
struct session *s = c->session;
struct options *oo = &s->options;
struct mouse_event *m = &c->tty.mouse;
int statusat;
statusat = status_at_line(c);
/* Is this a window selection click on the status line? */
if (statusat != -1 && m->y == (u_int)statusat &&
options_get_number(oo, "mouse-select-window")) {
if (m->event & MOUSE_EVENT_CLICK) {
status_set_window_at(c, m->x);
} else if (m->event == MOUSE_EVENT_WHEEL) {
if (m->wheel == MOUSE_WHEEL_UP)
session_previous(c->session, 0);
else if (m->wheel == MOUSE_WHEEL_DOWN)
session_next(c->session, 0);
server_redraw_session(s);
}
recalculate_sizes();
return;
}
/*
* Not on status line - adjust mouse position if status line is at the
* top and limit if at the bottom. From here on a struct mouse
* represents the offset onto the window itself.
*/
if (statusat == 0 && m->y > 0)
m->y--;
else if (statusat > 0 && m->y >= (u_int)statusat)
m->y = statusat - 1;
/* Is this a pane selection? Allow down only in copy mode. */
if (options_get_number(oo, "mouse-select-pane") &&
(m->event == MOUSE_EVENT_DOWN || wp->mode != &window_copy_mode)) {
window_set_active_at(wp->window, m->x, m->y);
server_redraw_window_borders(wp->window);
wp = wp->window->active; /* may have changed */
}
/* Check if trying to resize pane. */
if (options_get_number(oo, "mouse-resize-pane"))
layout_resize_pane_mouse(c);
/* Update last and pass through to client. */
window_pane_mouse(wp, c->session, m);
}
/* Is this fast enough to probably be a paste? */
int
server_client_assume_paste(struct session *s)
{
struct timeval tv;
int t;
if ((t = options_get_number(&s->options, "assume-paste-time")) == 0)
2013-01-18 02:10:29 +00:00
return (0);
timersub(&s->activity_time, &s->last_activity_time, &tv);
if (tv.tv_sec == 0 && tv.tv_usec < t * 1000)
2013-01-18 02:10:29 +00:00
return (1);
return (0);
}
/* Handle data key input from client. */
void
server_client_handle_key(struct client *c, int key)
{
struct session *s;
struct window *w;
struct window_pane *wp;
struct timeval tv;
struct key_binding *bd;
int xtimeout, isprefix, ispaste;
/* Check the client is good to accept input. */
if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
return;
if (c->session == NULL)
return;
s = c->session;
/* Update the activity timer. */
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday failed");
memcpy(&s->last_activity_time, &s->activity_time,
sizeof s->last_activity_time);
memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
w = c->session->curw->window;
wp = w->active;
/* Special case: 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');
if (wp != NULL && window_pane_visible(wp))
window_set_active_pane(w, wp);
server_clear_identify(c);
return;
}
/* Handle status line. */
if (!(c->flags & CLIENT_READONLY)) {
status_message_clear(c);
server_clear_identify(c);
}
if (c->prompt_string != NULL) {
if (!(c->flags & CLIENT_READONLY))
status_prompt_key(c, key);
return;
}
/* Check for mouse keys. */
if (key == KEYC_MOUSE) {
if (c->flags & CLIENT_READONLY)
return;
server_client_check_mouse(c, wp);
return;
}
/* Is this a prefix key? */
if (key == options_get_number(&s->options, "prefix"))
isprefix = 1;
else if (key == options_get_number(&s->options, "prefix2"))
isprefix = 1;
else
isprefix = 0;
/* Treat prefix as a regular key when pasting is detected. */
ispaste = server_client_assume_paste(s);
if (ispaste)
isprefix = 0;
/* No previous prefix key. */
if (!(c->flags & CLIENT_PREFIX)) {
if (isprefix) {
c->flags |= CLIENT_PREFIX;
server_status_client(c);
return;
}
/* Try as a non-prefix key binding. */
if (ispaste || (bd = key_bindings_lookup(key)) == NULL) {
if (!(c->flags & CLIENT_READONLY))
window_pane_key(wp, s, key);
} else
key_bindings_dispatch(bd, c);
return;
}
/* Prefix key already pressed. Reset prefix and lookup key. */
c->flags &= ~CLIENT_PREFIX;
server_status_client(c);
if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
/* If repeating, treat this as a key, else ignore. */
if (c->flags & CLIENT_REPEAT) {
c->flags &= ~CLIENT_REPEAT;
if (isprefix)
c->flags |= CLIENT_PREFIX;
else if (!(c->flags & CLIENT_READONLY))
window_pane_key(wp, s, key);
}
return;
}
/* If already repeating, but this key can't repeat, skip it. */
if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
c->flags &= ~CLIENT_REPEAT;
if (isprefix)
c->flags |= CLIENT_PREFIX;
else if (!(c->flags & CLIENT_READONLY))
window_pane_key(wp, s, key);
return;
}
/* If this key can repeat, reset the repeat flags and timer. */
xtimeout = options_get_number(&s->options, "repeat-time");
if (xtimeout != 0 && bd->can_repeat) {
c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
tv.tv_sec = xtimeout / 1000;
tv.tv_usec = (xtimeout % 1000) * 1000L;
evtimer_del(&c->repeat_timer);
evtimer_add(&c->repeat_timer, &tv);
}
/* Dispatch the command. */
key_bindings_dispatch(bd, c);
}
/* Client functions that need to happen every loop. */
void
server_client_loop(void)
{
struct client *c;
struct window *w;
struct window_pane *wp;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL)
continue;
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.
*/
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w == NULL)
continue;
w->flags &= ~WINDOW_REDRAW;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (wp->fd != -1) {
server_client_check_focus(wp);
server_client_check_resize(wp);
}
wp->flags &= ~PANE_REDRAW;
}
}
}
/* Check if pane should be resized. */
void
server_client_check_resize(struct window_pane *wp)
{
struct winsize ws;
if (!(wp->flags & PANE_RESIZE))
return;
memset(&ws, 0, sizeof ws);
ws.ws_col = wp->sx;
ws.ws_row = wp->sy;
if (ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
fatal("ioctl failed");
wp->flags &= ~PANE_RESIZE;
}
/* Check whether pane should be focused. */
void
server_client_check_focus(struct window_pane *wp)
{
u_int i;
struct client *c;
int push;
/* Are focus events off? */
if (!options_get_number(&global_options, "focus-events"))
return;
/* Do we need to push the focus state? */
push = wp->flags & PANE_FOCUSPUSH;
wp->flags &= ~PANE_FOCUSPUSH;
/* If we don't care about focus, forget it. */
if (!(wp->base.mode & MODE_FOCUSON))
return;
/* 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.
*/
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (!(c->flags & CLIENT_FOCUSED))
continue;
if (c->session->flags & SESSION_UNATTACHED)
continue;
if (c->session->curw->window == wp->window)
goto focused;
}
not_focused:
if (push || (wp->flags & PANE_FOCUSED))
bufferevent_write(wp->event, "\033[O", 3);
wp->flags &= ~PANE_FOCUSED;
return;
focused:
if (push || !(wp->flags & PANE_FOCUSED))
bufferevent_write(wp->event, "\033[I", 3);
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.
*/
void
server_client_reset_state(struct client *c)
{
struct window *w = c->session->curw->window;
struct window_pane *wp = w->active;
struct screen *s = wp->screen;
struct options *oo = &c->session->options;
struct options *wo = &w->options;
int status, mode, o;
if (c->flags & CLIENT_SUSPENDED)
return;
if (c->flags & CLIENT_CONTROL)
return;
tty_region(&c->tty, 0, c->tty.sy - 1);
status = options_get_number(oo, "status");
if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
tty_cursor(&c->tty, 0, 0);
else {
o = status && options_get_number (oo, "status-position") == 0;
tty_cursor(&c->tty, wp->xoff + s->cx, o + wp->yoff + s->cy);
}
/*
* Resizing panes with the mouse requires at least button mode to give
* a smooth appearance.
*/
mode = s->mode;
if ((c->tty.mouse.flags & MOUSE_RESIZE_PANE) &&
!(mode & (MODE_MOUSE_BUTTON|MODE_MOUSE_ANY)))
mode |= MODE_MOUSE_BUTTON;
/*
* Any mode will do for mouse-select-pane, but set standard mode if
* none.
*/
if ((mode & ALL_MOUSE_MODES) == 0) {
if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
options_get_number(oo, "mouse-select-pane"))
mode |= MODE_MOUSE_STANDARD;
else if (options_get_number(oo, "mouse-resize-pane"))
mode |= MODE_MOUSE_STANDARD;
else if (options_get_number(oo, "mouse-select-window"))
mode |= MODE_MOUSE_STANDARD;
else if (options_get_number(wo, "mode-mouse"))
mode |= MODE_MOUSE_STANDARD;
}
/*
* Set UTF-8 mouse input if required. If the terminal is UTF-8, the
* user has set mouse-utf8 and any mouse mode is in effect, turn on
* UTF-8 mouse input. If the receiving terminal hasn't requested it
* (that is, it isn't in s->mode), then it'll be converted in
* input_mouse.
*/
if ((c->tty.flags & TTY_UTF8) &&
(mode & ALL_MOUSE_MODES) && options_get_number(oo, "mouse-utf8"))
mode |= MODE_MOUSE_UTF8;
else
mode &= ~MODE_MOUSE_UTF8;
/* Set the terminal mode and reset attributes. */
tty_update_mode(&c->tty, mode, s);
tty_reset(&c->tty);
}
/* Repeat time callback. */
void
server_client_repeat_timer(unused int fd, unused short events, void *data)
{
struct client *c = data;
if (c->flags & CLIENT_REPEAT) {
if (c->flags & CLIENT_PREFIX)
server_status_client(c);
c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
}
}
/* Check if client should be exited. */
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;
server_write_client(c, MSG_EXIT, &c->retval, sizeof c->retval);
c->flags &= ~CLIENT_EXIT;
}
/* Check for client redraws. */
void
server_client_check_redraw(struct client *c)
{
struct session *s = c->session;
struct window_pane *wp;
int flags, redraw;
if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
return;
flags = c->tty.flags & TTY_FREEZE;
c->tty.flags &= ~TTY_FREEZE;
if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
if (options_get_number(&s->options, "set-titles"))
server_client_set_title(c);
if (c->message_string != NULL)
redraw = status_message_redraw(c);
else if (c->prompt_string != NULL)
redraw = status_prompt_redraw(c);
else
redraw = status_redraw(c);
if (!redraw)
c->flags &= ~CLIENT_STATUS;
}
if (c->flags & CLIENT_REDRAW) {
screen_redraw_screen(c, 0, 0);
c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
} else if (c->flags & CLIENT_REDRAWWINDOW) {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
screen_redraw_pane(c, wp);
c->flags &= ~CLIENT_REDRAWWINDOW;
} else {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
if (wp->flags & PANE_REDRAW)
screen_redraw_pane(c, wp);
}
}
if (c->flags & CLIENT_BORDERS)
screen_redraw_screen(c, 0, 1);
if (c->flags & CLIENT_STATUS)
screen_redraw_screen(c, 1, 0);
c->tty.flags |= flags;
c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
}
/* Set client title. */
void
server_client_set_title(struct client *c)
{
struct session *s = c->session;
const char *template;
char *title;
template = options_get_string(&s->options, "set-titles-string");
title = status_replace(c, NULL, NULL, NULL, template, time(NULL), 1);
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);
}
/* Dispatch message from client. */
int
server_client_msg_dispatch(struct client *c)
{
struct imsg imsg;
struct msg_stdin_data stdindata;
const char *data;
ssize_t n, datalen;
if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
return (-1);
for (;;) {
if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
return (-1);
if (n == 0)
return (0);
data = imsg.data;
datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
if (imsg.hdr.peerid != PROTOCOL_VERSION) {
server_write_client(c, MSG_VERSION, NULL, 0);
c->flags |= CLIENT_BAD;
if (imsg.fd != -1)
close(imsg.fd);
imsg_free(&imsg);
continue;
}
log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
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_DONE:
server_client_msg_identify(c, &imsg);
break;
case MSG_COMMAND:
server_client_msg_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;
if (tty_resize(&c->tty)) {
recalculate_sizes();
server_redraw_client(c);
}
break;
case MSG_EXITING:
if (datalen != 0)
fatalx("bad MSG_EXITING size");
c->session = NULL;
tty_close(&c->tty);
server_write_client(c, MSG_EXITED, 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 (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday");
if (c->session != NULL)
session_update_activity(c->session);
tty_start_tty(&c->tty);
server_redraw_client(c);
recalculate_sizes();
break;
case MSG_SHELL:
if (datalen != 0)
fatalx("bad MSG_SHELL size");
server_client_msg_shell(c);
break;
}
imsg_free(&imsg);
}
}
/* Handle command message. */
void
server_client_msg_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 (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) {
cmdq_error(c->cmdq, "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) {
cmdq_error(c->cmdq, "%s", cause);
cmd_free_argv(argc, argv);
goto error;
}
cmd_free_argv(argc, argv);
cmdq_run(c->cmdq, cmdlist);
cmd_list_free(cmdlist);
return;
error:
if (cmdlist != NULL)
cmd_list_free(cmdlist);
c->flags |= CLIENT_EXIT;
}
/* Handle identify message. */
void
server_client_msg_identify(struct client *c, struct imsg *imsg)
{
const char *data;
size_t datalen;
int flags;
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;
break;
case MSG_IDENTIFY_TERM:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_TERM string");
c->term = xstrdup(data);
break;
case MSG_IDENTIFY_TTYNAME:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_TTYNAME string");
c->ttyname = xstrdup(data);
break;
case MSG_IDENTIFY_CWD:
if (datalen != 0)
fatalx("bad MSG_IDENTIFY_CWD size");
c->cwd = imsg->fd;
break;
case MSG_IDENTIFY_STDIN:
if (datalen != 0)
fatalx("bad MSG_IDENTIFY_STDIN size");
c->fd = 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);
break;
default:
break;
}
if (imsg->hdr.type != MSG_IDENTIFY_DONE)
return;
c->flags |= CLIENT_IDENTIFIED;
#ifdef __CYGWIN__
c->fd = open(c->ttyname, O_RDWR|O_NOCTTY);
c->cwd = open(".", O_RDONLY);
#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");
server_write_client(c, MSG_STDIN, NULL, 0);
c->tty.fd = -1;
c->tty.log_fd = -1;
close(c->fd);
c->fd = -1;
return;
}
if (c->fd == -1)
return;
if (!isatty(c->fd)) {
close(c->fd);
c->fd = -1;
return;
}
tty_init(&c->tty, c, c->fd, c->term);
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. */
void
server_client_msg_shell(struct client *c)
{
const char *shell;
shell = options_get_string(&global_s_options, "default-shell");
if (*shell == '\0' || areshell(shell))
shell = _PATH_BSHELL;
server_write_client(c, MSG_SHELL, shell, strlen(shell) + 1);
c->flags |= CLIENT_BAD; /* it will die after exec */
}