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tmate/server.c
Tiago Cunha de7483a114 Sync OpenBSD patchset 192: 
Next step towards customisable mode keys: build each default table of keys
into a named tree on start and use that for lookups. Also add command to string
translation tables and modify list-keys to show the mode key bindings (new
-t argument).
2009-07-28 23:11:18 +00:00

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/* $Id: server.c,v 1.164 2009-07-28 23:11:18 tcunha Exp $ */
/*
* Copyright (c) 2007 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>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
/*
* Main server functions.
*/
/* Client list. */
struct clients clients;
void server_create_client(int);
int server_create_socket(void);
int server_main(int);
void server_shutdown(void);
void server_child_signal(void);
void server_fill_windows(struct pollfd **);
void server_handle_windows(struct pollfd **);
void server_fill_clients(struct pollfd **);
void server_handle_clients(struct pollfd **);
void server_accept_client(int);
void server_handle_client(struct client *);
void server_handle_window(struct window *, struct window_pane *);
int server_check_window_bell(struct session *, struct window *);
int server_check_window_activity(struct session *,
struct window *);
int server_check_window_content(struct session *, struct window *,
struct window_pane *);
void server_lost_client(struct client *);
void server_check_window(struct window *);
void server_check_redraw(struct client *);
void server_redraw_locked(struct client *);
void server_check_timers(struct client *);
void server_second_timers(void);
int server_update_socket(void);
/* Create a new client. */
void
server_create_client(int fd)
{
struct client *c;
int mode;
u_int i;
if ((mode = fcntl(fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failed");
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
fatal("fcntl failed");
c = xcalloc(1, sizeof *c);
c->fd = fd;
c->in = buffer_create(BUFSIZ);
c->out = buffer_create(BUFSIZ);
ARRAY_INIT(&c->prompt_hdata);
c->tty.fd = -1;
c->title = NULL;
c->session = NULL;
c->tty.sx = 80;
c->tty.sy = 25;
screen_init(&c->status, c->tty.sx, 1, 0);
c->message_string = NULL;
c->prompt_string = NULL;
c->prompt_buffer = NULL;
c->prompt_index = 0;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) == NULL) {
ARRAY_SET(&clients, i, c);
return;
}
}
ARRAY_ADD(&clients, c);
}
/* Find client index. */
int
server_client_index(struct client *c)
{
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (c == ARRAY_ITEM(&clients, i))
return (i);
}
return (-1);
}
/* Fork new server. */
int
server_start(char *path)
{
int pair[2], srv_fd, null_fd;
char *cause;
#ifdef HAVE_SETPROCTITLE
char rpathbuf[MAXPATHLEN];
#endif
/* The first client is special and gets a socketpair; create it. */
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
fatal("socketpair failed");
switch (fork()) {
case -1:
fatal("fork failed");
case 0:
break;
default:
close(pair[1]);
return (pair[0]);
}
close(pair[0]);
/*
* Must daemonise before loading configuration as the PID changes so
* $TMUX would be wrong for sessions created in the config file.
*/
if (daemon(1, 1) != 0)
fatal("daemon failed");
ARRAY_INIT(&windows);
ARRAY_INIT(&clients);
ARRAY_INIT(&sessions);
mode_key_init_trees();
key_bindings_init();
utf8_build();
server_locked = 0;
server_password = NULL;
server_activity = time(NULL);
start_time = time(NULL);
socket_path = path;
if (access(SYSTEM_CFG, R_OK) != 0) {
if (errno != ENOENT) {
log_warn("%s", SYSTEM_CFG);
exit(1);
}
} else {
if (load_cfg(SYSTEM_CFG, &cause) != 0) {
log_warnx("%s", cause);
exit(1);
}
}
if (cfg_file != NULL && load_cfg(cfg_file, &cause) != 0) {
log_warnx("%s", cause);
exit(1);
}
logfile("server");
/*
* Close stdin/stdout/stderr. Can't let daemon() do this as they are
* needed until now to print configuration file errors.
*/
if ((null_fd = open(_PATH_DEVNULL, O_RDWR)) != -1) {
dup2(null_fd, STDIN_FILENO);
dup2(null_fd, STDOUT_FILENO);
dup2(null_fd, STDERR_FILENO);
if (null_fd > 2)
close(null_fd);
}
log_debug("server started, pid %ld", (long) getpid());
log_debug("socket path %s", socket_path);
#ifdef HAVE_SETPROCTITLE
if (realpath(socket_path, rpathbuf) == NULL)
strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
setproctitle("server (%s)", rpathbuf);
#endif
srv_fd = server_create_socket();
server_create_client(pair[1]);
exit(server_main(srv_fd));
}
/* Create server socket. */
int
server_create_socket(void)
{
struct sockaddr_un sa;
size_t size;
mode_t mask;
int fd, mode;
memset(&sa, 0, sizeof sa);
sa.sun_family = AF_UNIX;
size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
if (size >= sizeof sa.sun_path) {
errno = ENAMETOOLONG;
fatal("socket failed");
}
unlink(sa.sun_path);
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
fatal("socket failed");
mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
fatal("bind failed");
umask(mask);
if (listen(fd, 16) == -1)
fatal("listen failed");
if ((mode = fcntl(fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failed");
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
fatal("fcntl failed");
return (fd);
}
/* Main server loop. */
int
server_main(int srv_fd)
{
struct window *w;
struct pollfd *pfds, *pfd;
int nfds, xtimeout;
u_int i, n;
time_t now, last;
siginit();
last = time(NULL);
pfds = NULL;
for (;;) {
/* If sigterm, kill all windows and clients. */
if (sigterm)
server_shutdown();
/* Handle child exit. */
if (sigchld) {
server_child_signal();
sigchld = 0;
}
/* Recreate socket on SIGUSR1. */
if (sigusr1) {
close(srv_fd);
srv_fd = server_create_socket();
sigusr1 = 0;
}
/* Initialise pollfd array. */
nfds = 1;
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w != NULL)
nfds += window_count_panes(w);
}
nfds += ARRAY_LENGTH(&clients) * 2;
pfds = xrealloc(pfds, nfds, sizeof *pfds);
memset(pfds, 0, nfds * sizeof *pfds);
pfd = pfds;
/* Fill server socket. */
pfd->fd = srv_fd;
pfd->events = POLLIN;
pfd++;
/* Fill window and client sockets. */
server_fill_windows(&pfd);
server_fill_clients(&pfd);
/* Update socket permissions. */
xtimeout = INFTIM;
if (sigterm || server_update_socket() != 0)
xtimeout = POLL_TIMEOUT;
/* Do the poll. */
if (poll(pfds, nfds, xtimeout) == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
fatal("poll failed");
}
pfd = pfds;
/* Handle server socket. */
#ifdef HAVE_POLL
if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
fatalx("lost server socket");
#endif
if (pfd->revents & POLLIN) {
server_accept_client(srv_fd);
continue;
}
pfd++;
/* Call second-based timers. */
now = time(NULL);
if (now != last) {
last = now;
server_second_timers();
}
/* Set window names. */
set_window_names();
/*
* Handle window and client sockets. Clients can create
* windows, so windows must come first to avoid messing up by
* increasing the array size.
*/
server_handle_windows(&pfd);
server_handle_clients(&pfd);
/* Collect any unset key bindings. */
key_bindings_clean();
/*
* If we have no sessions and clients left, let's get out
* of here...
*/
n = 0;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if (ARRAY_ITEM(&sessions, i) != NULL)
n++;
}
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) != NULL)
n++;
}
if (n == 0)
break;
}
if (pfds != NULL)
xfree(pfds);
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if (ARRAY_ITEM(&sessions, i) != NULL)
session_destroy(ARRAY_ITEM(&sessions, i));
}
ARRAY_FREE(&sessions);
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) != NULL)
server_lost_client(ARRAY_ITEM(&clients, i));
}
ARRAY_FREE(&clients);
mode_key_free_trees();
key_bindings_free();
close(srv_fd);
unlink(socket_path);
xfree(socket_path);
options_free(&global_s_options);
options_free(&global_w_options);
if (server_password != NULL)
xfree(server_password);
return (0);
}
/* Kill all clients. */
void
server_shutdown(void)
{
struct session *s;
struct client *c;
u_int i, j;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
c = ARRAY_ITEM(&clients, j);
if (c != NULL && c->session == s) {
s = NULL;
break;
}
}
if (s != NULL)
session_destroy(s);
}
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c != NULL)
server_write_client(c, MSG_SHUTDOWN, NULL, 0);
}
}
/* Handle SIGCHLD. */
void
server_child_signal(void)
{
struct window *w;
struct window_pane *wp;
int status;
pid_t pid;
u_int i;
for (;;) {
switch (pid = waitpid(WAIT_ANY, &status, WNOHANG|WUNTRACED)) {
case -1:
if (errno == ECHILD)
return;
fatal("waitpid");
case 0:
return;
}
if (!WIFSTOPPED(status))
continue;
if (WSTOPSIG(status) == SIGTTIN || WSTOPSIG(status) == SIGTTOU)
continue;
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w == NULL)
continue;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (wp->pid == pid) {
if (killpg(pid, SIGCONT) != 0)
kill(pid, SIGCONT);
}
}
}
}
}
/* Fill window pollfds. */
void
server_fill_windows(struct pollfd **pfd)
{
struct window *w;
struct window_pane *wp;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w == NULL)
continue;
TAILQ_FOREACH(wp, &w->panes, entry) {
(*pfd)->fd = wp->fd;
if (wp->fd != -1) {
(*pfd)->events = POLLIN;
if (BUFFER_USED(wp->out) > 0)
(*pfd)->events |= POLLOUT;
}
(*pfd)++;
}
}
}
/* Handle window pollfds. */
void
server_handle_windows(struct pollfd **pfd)
{
struct window *w;
struct window_pane *wp;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w == NULL)
continue;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (wp->fd != -1) {
if (buffer_poll(*pfd, wp->in, wp->out) != 0) {
close(wp->fd);
wp->fd = -1;
} else
server_handle_window(w, wp);
}
(*pfd)++;
}
server_check_window(w);
}
}
/* Check for general redraw on client. */
void
server_check_redraw(struct client *c)
{
struct session *s;
struct window_pane *wp;
char title[512];
int flags, redraw;
if (c == NULL || c->session == NULL)
return;
s = c->session;
flags = c->tty.flags & TTY_FREEZE;
c->tty.flags &= ~TTY_FREEZE;
if (options_get_number(&s->options, "set-titles")) {
xsnprintf(title, sizeof title, "%s:%u:%s - \"%s\"",
s->name, s->curw->idx, s->curw->window->name,
s->curw->window->active->screen->title);
if (c->title == NULL || strcmp(title, c->title) != 0) {
if (c->title != NULL)
xfree(c->title);
c->title = xstrdup(title);
tty_set_title(&c->tty, c->title);
}
}
if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
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) {
if (server_locked)
server_redraw_locked(c);
else
screen_redraw_screen(c, 0);
c->flags &= ~CLIENT_STATUS;
} else {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
if (wp->flags & PANE_REDRAW)
screen_redraw_pane(c, wp);
}
}
if (c->flags & CLIENT_STATUS)
screen_redraw_screen(c, 1);
c->tty.flags |= flags;
c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS);
}
/* Redraw client when locked. */
void
server_redraw_locked(struct client *c)
{
struct screen_write_ctx ctx;
struct screen screen;
struct grid_cell gc;
u_int colour, xx, yy, i;
int style;
xx = c->tty.sx;
yy = c->tty.sy - 1;
if (xx == 0 || yy == 0)
return;
colour = options_get_number(&global_w_options, "clock-mode-colour");
style = options_get_number(&global_w_options, "clock-mode-style");
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.fg = colour;
gc.attr |= GRID_ATTR_BRIGHT;
screen_init(&screen, xx, yy, 0);
screen_write_start(&ctx, NULL, &screen);
clock_draw(&ctx, colour, style);
if (password_failures != 0) {
screen_write_cursormove(&ctx, 0, 0);
screen_write_puts(
&ctx, &gc, "%u failed attempts", password_failures);
}
screen_write_stop(&ctx);
for (i = 0; i < screen_size_y(&screen); i++)
tty_draw_line(&c->tty, &screen, i, 0, 0);
screen_redraw_screen(c, 1);
screen_free(&screen);
}
/* Check for timers on client. */
void
server_check_timers(struct client *c)
{
struct session *s;
struct timeval tv;
u_int interval;
if (c == NULL || c->session == NULL)
return;
s = c->session;
if (gettimeofday(&tv, NULL) != 0)
fatal("gettimeofday");
if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
status_message_clear(c);
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.
*/
return;
}
if (!options_get_number(&s->options, "status"))
return;
/* Check timer; resolution is only a second so don't be too clever. */
interval = options_get_number(&s->options, "status-interval");
if (interval == 0)
return;
if (tv.tv_sec < c->status_timer.tv_sec ||
((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval)
c->flags |= CLIENT_STATUS;
}
/* Fill client pollfds. */
void
server_fill_clients(struct pollfd **pfd)
{
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);
server_check_timers(c);
server_check_redraw(c);
if (c == NULL)
(*pfd)->fd = -1;
else {
(*pfd)->fd = c->fd;
(*pfd)->events = POLLIN;
if (BUFFER_USED(c->out) > 0)
(*pfd)->events |= POLLOUT;
}
(*pfd)++;
if (c == NULL || c->flags & CLIENT_SUSPENDED ||
c->tty.fd == -1 || c->session == NULL)
(*pfd)->fd = -1;
else {
(*pfd)->fd = c->tty.fd;
(*pfd)->events = POLLIN;
if (BUFFER_USED(c->tty.out) > 0)
(*pfd)->events |= POLLOUT;
}
(*pfd)++;
}
/*
* Clear any window redraw flags (will have been redrawn as part of
* client).
*/
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)
wp->flags &= ~PANE_REDRAW;
}
}
/* Handle client pollfds. */
void
server_handle_clients(struct pollfd **pfd)
{
struct client *c;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c != NULL) {
if (buffer_poll(*pfd, c->in, c->out) != 0) {
server_lost_client(c);
(*pfd) += 2;
continue;
} else
server_msg_dispatch(c);
}
(*pfd)++;
if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
c->tty.fd != -1 && c->session != NULL) {
if (buffer_poll(*pfd, c->tty.in, c->tty.out) != 0)
server_lost_client(c);
else
server_handle_client(c);
}
(*pfd)++;
}
}
/* accept(2) and create new client. */
void
server_accept_client(int srv_fd)
{
struct sockaddr_storage sa;
socklen_t slen = sizeof sa;
int fd;
fd = accept(srv_fd, (struct sockaddr *) &sa, &slen);
if (fd == -1) {
if (errno == EAGAIN || errno == EINTR || errno == ECONNABORTED)
return;
fatal("accept failed");
}
if (sigterm) {
close(fd);
return;
}
server_create_client(fd);
}
/* Input data from client. */
void
server_handle_client(struct client *c)
{
struct window_pane *wp;
struct screen *s;
struct timeval tv;
struct key_binding *bd;
int key, prefix, status, xtimeout;
int mode;
u_char mouse[3];
xtimeout = options_get_number(&c->session->options, "repeat-time");
if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
if (gettimeofday(&tv, NULL) != 0)
fatal("gettimeofday");
if (timercmp(&tv, &c->repeat_timer, >))
c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
}
/* Process keys. */
prefix = options_get_number(&c->session->options, "prefix");
while (tty_keys_next(&c->tty, &key, mouse) == 0) {
server_activity = time(NULL);
if (c->session == NULL)
return;
wp = c->session->curw->window->active; /* could die */
status_message_clear(c);
if (c->prompt_string != NULL) {
status_prompt_key(c, key);
continue;
}
if (server_locked)
continue;
/* Check for mouse keys. */
if (key == KEYC_MOUSE) {
window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
continue;
}
/* No previous prefix key. */
if (!(c->flags & CLIENT_PREFIX)) {
if (key == prefix)
c->flags |= CLIENT_PREFIX;
else {
/* Try as a non-prefix key binding. */
if ((bd = key_bindings_lookup(key)) == NULL)
window_pane_key(wp, c, key);
else
key_bindings_dispatch(bd, c);
}
continue;
}
/* Prefix key already pressed. Reset prefix and lookup key. */
c->flags &= ~CLIENT_PREFIX;
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 (key == prefix)
c->flags |= CLIENT_PREFIX;
else
window_pane_key(wp, c, key);
}
continue;
}
/* If already repeating, but this key can't repeat, skip it. */
if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
c->flags &= ~CLIENT_REPEAT;
if (key == prefix)
c->flags |= CLIENT_PREFIX;
else
window_pane_key(wp, c, key);
continue;
}
/* If this key can repeat, reset the repeat flags and timer. */
if (xtimeout != 0 && bd->can_repeat) {
c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
tv.tv_sec = xtimeout / 1000;
tv.tv_usec = (xtimeout % 1000) * 1000L;
if (gettimeofday(&c->repeat_timer, NULL) != 0)
fatal("gettimeofday");
timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
}
/* Dispatch the command. */
key_bindings_dispatch(bd, c);
}
if (c->session == NULL)
return;
wp = c->session->curw->window->active; /* could die - do each loop */
s = wp->screen;
/* Ensure cursor position and mode settings. */
status = options_get_number(&c->session->options, "status");
if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
tty_cursor(&c->tty, 0, 0, 0, 0);
else
tty_cursor(&c->tty, s->cx, s->cy, wp->xoff, wp->yoff);
mode = s->mode;
if (server_locked)
mode &= ~TTY_NOCURSOR;
tty_update_mode(&c->tty, mode);
}
/* Lost a client. */
void
server_lost_client(struct client *c)
{
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) == c)
ARRAY_SET(&clients, i, NULL);
}
tty_free(&c->tty, c->flags & CLIENT_SUSPENDED);
screen_free(&c->status);
if (c->title != NULL)
xfree(c->title);
if (c->message_string != NULL)
xfree(c->message_string);
if (c->prompt_string != NULL)
xfree(c->prompt_string);
if (c->prompt_buffer != NULL)
xfree(c->prompt_buffer);
for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
xfree(ARRAY_ITEM(&c->prompt_hdata, i));
ARRAY_FREE(&c->prompt_hdata);
if (c->cwd != NULL)
xfree(c->cwd);
close(c->fd);
buffer_destroy(c->in);
buffer_destroy(c->out);
xfree(c);
recalculate_sizes();
}
/* Handle window data. */
void
server_handle_window(struct window *w, struct window_pane *wp)
{
struct session *s;
u_int i;
int update;
window_pane_parse(wp);
if ((w->flags & (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT)) == 0)
return;
update = 0;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s == NULL || !session_has(s, w))
continue;
update += server_check_window_bell(s, w);
update += server_check_window_activity(s, w);
update += server_check_window_content(s, w, wp);
}
if (update)
server_status_window(w);
w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
}
int
server_check_window_bell(struct session *s, struct window *w)
{
struct client *c;
u_int i;
int action, visual;
if (!(w->flags & WINDOW_BELL))
return (0);
if (session_alert_has_window(s, w, WINDOW_BELL))
return (0);
session_alert_add(s, w, WINDOW_BELL);
action = options_get_number(&s->options, "bell-action");
switch (action) {
case BELL_ANY:
if (s->flags & SESSION_UNATTACHED)
break;
visual = options_get_number(&s->options, "visual-bell");
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session != s)
continue;
if (!visual) {
tty_putcode(&c->tty, TTYC_BEL);
continue;
}
if (c->session->curw->window == w) {
status_message_set(c, "Bell in current window");
continue;
}
status_message_set(c, "Bell in window %u",
winlink_find_by_window(&s->windows, w)->idx);
}
break;
case BELL_CURRENT:
if (s->flags & SESSION_UNATTACHED)
break;
visual = options_get_number(&s->options, "visual-bell");
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session != s)
continue;
if (c->session->curw->window != w)
continue;
if (!visual) {
tty_putcode(&c->tty, TTYC_BEL);
continue;
}
status_message_set(c, "Bell in current window");
}
break;
}
return (1);
}
int
server_check_window_activity(struct session *s, struct window *w)
{
struct client *c;
u_int i;
if (!(w->flags & WINDOW_ACTIVITY))
return (0);
if (!options_get_number(&w->options, "monitor-activity"))
return (0);
if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
return (0);
if (s->curw->window == w)
return (0);
session_alert_add(s, w, WINDOW_ACTIVITY);
if (s->flags & SESSION_UNATTACHED)
return (0);
if (options_get_number(&s->options, "visual-activity")) {
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session != s)
continue;
status_message_set(c, "Activity in window %u",
winlink_find_by_window(&s->windows, w)->idx);
}
}
return (1);
}
int
server_check_window_content(
struct session *s, struct window *w, struct window_pane *wp)
{
struct client *c;
u_int i;
char *found, *ptr;
if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
return (0);
ptr = options_get_string(&w->options, "monitor-content");
if (ptr == NULL || *ptr == '\0')
return (0);
if (session_alert_has_window(s, w, WINDOW_CONTENT))
return (0);
if (s->curw->window == w)
return (0);
if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
return (0);
xfree(found);
session_alert_add(s, w, WINDOW_CONTENT);
if (s->flags & SESSION_UNATTACHED)
return (0);
if (options_get_number(&s->options, "visual-content")) {
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session != s)
continue;
status_message_set(c, "Content in window %u",
winlink_find_by_window(&s->windows, w)->idx);
}
}
return (1);
}
/* Check if window still exists. */
void
server_check_window(struct window *w)
{
struct window_pane *wp, *wq;
struct client *c;
struct session *s;
struct winlink *wl;
u_int i, j;
int destroyed, flag;
flag = options_get_number(&w->options, "remain-on-exit");
destroyed = 1;
wp = TAILQ_FIRST(&w->panes);
while (wp != NULL) {
wq = TAILQ_NEXT(wp, entry);
/*
* If the pane has died and the remain-on-exit flag is not set,
* remove the pane; otherwise, if the flag is set, don't allow
* the window to be destroyed (or it'll close when the last
* pane dies).
*/
if (wp->fd == -1 && !flag) {
layout_close_pane(wp);
window_remove_pane(w, wp);
server_redraw_window(w);
} else
destroyed = 0;
wp = wq;
}
if (!destroyed)
return;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s == NULL)
continue;
if (!session_has(s, w))
continue;
restart:
/* Detach window and either redraw or kill clients. */
RB_FOREACH(wl, winlinks, &s->windows) {
if (wl->window != w)
continue;
destroyed = session_detach(s, wl);
for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
c = ARRAY_ITEM(&clients, j);
if (c == NULL || c->session != s)
continue;
if (!destroyed) {
server_redraw_client(c);
continue;
}
c->session = NULL;
server_write_client(c, MSG_EXIT, NULL, 0);
}
/* If the session was destroyed, bail now. */
if (destroyed)
break;
goto restart;
}
}
recalculate_sizes();
}
/* Call any once-per-second timers. */
void
server_second_timers(void)
{
struct window *w;
struct window_pane *wp;
u_int i;
int xtimeout;
struct tm now, then;
static time_t last_t = 0;
time_t t;
t = time(NULL);
xtimeout = options_get_number(&global_s_options, "lock-after-time");
if (xtimeout > 0 && t > server_activity + xtimeout)
server_lock();
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w == NULL)
continue;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (wp->mode != NULL && wp->mode->timer != NULL)
wp->mode->timer(wp);
}
}
/* Check for a minute having passed. */
gmtime_r(&t, &now);
gmtime_r(&last_t, &then);
if (now.tm_min == then.tm_min)
return;
last_t = t;
/* If locked, redraw all clients. */
if (server_locked) {
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) != NULL)
server_redraw_client(ARRAY_ITEM(&clients, i));
}
}
}
/* Update socket execute permissions based on whether sessions are attached. */
int
server_update_socket(void)
{
struct session *s;
u_int i;
static int last = -1;
int n;
n = 0;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s != NULL && !(s->flags & SESSION_UNATTACHED)) {
n++;
break;
}
}
if (n != last) {
last = n;
if (n != 0)
chmod(socket_path, S_IRWXU);
else
chmod(socket_path, S_IRUSR|S_IWUSR);
}
return (n);
}
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