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/* $Id: server.c,v 1.210 2009-10-15 01:43:16 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;
struct clients dead_clients;
/* Mapping of a pollfd to an fd independent of its position in the array. */
struct poll_item {
struct pollfd pfd;
RB_ENTRY(poll_item) entry;
};
RB_HEAD(poll_items, poll_item) poll_items;
int server_poll_cmp(struct poll_item *, struct poll_item *);
struct pollfd *server_poll_lookup(int);
void server_poll_add(int, int);
struct pollfd *server_poll_flatten(int *);
void server_poll_parse(struct pollfd *);
void server_poll_reset(void);
RB_PROTOTYPE(poll_items, poll_item, entry, server_poll_cmp);
RB_GENERATE(poll_items, poll_item, entry, server_poll_cmp);
void server_create_client(int);
int server_create_socket(void);
int server_main(int);
void server_shutdown(void);
int server_should_shutdown(void);
void server_child_signal(void);
void server_fill_windows(void);
void server_handle_windows(void);
void server_fill_clients(void);
void server_handle_clients(void);
void server_fill_jobs(void);
void server_handle_jobs(void);
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_clean_dead(void);
void server_lost_client(struct client *);
void server_check_window(struct window *);
void server_check_redraw(struct client *);
void server_set_title(struct client *);
void server_check_timers(struct client *);
void server_check_jobs(void);
void server_lock_server(void);
void server_lock_sessions(void);
void server_check_clients(void);
void server_second_timers(void);
int server_update_socket(void);
int
server_poll_cmp(struct poll_item *pitem1, struct poll_item *pitem2)
{
return (pitem1->pfd.fd - pitem2->pfd.fd);
}
struct pollfd *
server_poll_lookup(int fd)
{
struct poll_item pitem;
pitem.pfd.fd = fd;
return (&RB_FIND(poll_items, &poll_items, &pitem)->pfd);
}
void
server_poll_add(int fd, int events)
{
struct poll_item *pitem;
pitem = xmalloc(sizeof *pitem);
pitem->pfd.fd = fd;
pitem->pfd.events = events;
RB_INSERT(poll_items, &poll_items, pitem);
}
struct pollfd *
server_poll_flatten(int *nfds)
{
struct poll_item *pitem;
struct pollfd *pfds;
pfds = NULL;
*nfds = 0;
RB_FOREACH(pitem, poll_items, &poll_items) {
pfds = xrealloc(pfds, (*nfds) + 1, sizeof *pfds);
pfds[*nfds].fd = pitem->pfd.fd;
pfds[*nfds].events = pitem->pfd.events;
(*nfds)++;
}
return (pfds);
}
void
server_poll_parse(struct pollfd *pfds)
{
struct poll_item *pitem;
int nfds;
nfds = 0;
RB_FOREACH(pitem, poll_items, &poll_items) {
pitem->pfd.revents = pfds[nfds].revents;
nfds++;
}
xfree(pfds);
}
void
server_poll_reset(void)
{
struct poll_item *pitem;
while (!RB_EMPTY(&poll_items)) {
pitem = RB_ROOT(&poll_items);
RB_REMOVE(poll_items, &poll_items, pitem);
xfree(pitem);
}
}
/* 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->references = 0;
imsg_init(&c->ibuf, fd);
if (gettimeofday(&c->tv, NULL) != 0)
fatal("gettimeofday failed");
ARRAY_INIT(&c->prompt_hdata);
c->tty.fd = -1;
c->title = NULL;
c->session = NULL;
c->tty.sx = 80;
c->tty.sy = 24;
screen_init(&c->status, c->tty.sx, 1, 0);
job_tree_init(&c->status_jobs);
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);
log_debug("new client %d", fd);
}
/* Fork new server. */
int
server_start(char *path)
{
struct client *c;
int pair[2], srv_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, 0) != 0)
fatal("daemon failed");
logfile("server");
log_debug("server started, pid %ld", (long) getpid());
ARRAY_INIT(&windows);
ARRAY_INIT(&clients);
ARRAY_INIT(&dead_clients);
ARRAY_INIT(&sessions);
ARRAY_INIT(&dead_sessions);
TAILQ_INIT(&session_groups);
mode_key_init_trees();
key_bindings_init();
utf8_build();
start_time = time(NULL);
socket_path = path;
#ifdef HAVE_SETPROCTITLE
if (realpath(socket_path, rpathbuf) == NULL)
strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
log_debug("socket path %s", socket_path);
setproctitle("server (%s)", rpathbuf);
#endif
srv_fd = server_create_socket();
server_create_client(pair[1]);
if (access(SYSTEM_CFG, R_OK) != 0) {
if (errno != ENOENT) {
xasprintf(
&cause, "%s: %s", strerror(errno), SYSTEM_CFG);
goto error;
}
} else if (load_cfg(SYSTEM_CFG, NULL, &cause) != 0)
goto error;
if (cfg_file != NULL && load_cfg(cfg_file, NULL, &cause) != 0)
goto error;
exit(server_main(srv_fd));
error:
/* Write the error and shutdown the server. */
c = ARRAY_FIRST(&clients);
server_write_error(c, cause);
xfree(cause);
sigterm = 1;
server_shutdown();
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 pollfd *pfds, *pfd;
int nfds, xtimeout;
u_int i;
time_t now, last;
siginit();
log_debug("server socket is %d", srv_fd);
last = time(NULL);
pfds = NULL;
for (;;) {
/* If sigterm, kill all windows and clients. */
if (sigterm)
server_shutdown();
/* Stop if no sessions or clients left. */
if (server_should_shutdown())
break;
/* 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;
}
/* Collect any jobs that have died and process clients. */
server_check_jobs();
server_check_clients();
/* Initialise pollfd array and add server socket. */
server_poll_reset();
server_poll_add(srv_fd, POLLIN);
/* Fill window and client sockets. */
server_fill_jobs();
server_fill_windows();
server_fill_clients();
/* Update socket permissions. */
xtimeout = INFTIM;
if (server_update_socket() != 0)
xtimeout = POLL_TIMEOUT;
/* Do the poll. */
pfds = server_poll_flatten(&nfds);
if (poll(pfds, nfds, xtimeout) == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
fatal("poll failed");
}
server_poll_parse(pfds);
/* Handle server socket. */
pfd = server_poll_lookup(srv_fd);
if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
fatalx("lost server socket");
if (pfd->revents & POLLIN) {
server_accept_client(srv_fd);
continue;
}
/* 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. */
server_handle_jobs();
server_handle_windows();
server_handle_clients();
/* Collect any unset key bindings. */
key_bindings_clean();
/* Collect dead clients and sessions. */
server_clean_dead();
}
server_poll_reset();
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);
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(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c != NULL) {
if (c->flags & (CLIENT_BAD|CLIENT_SUSPENDED))
server_lost_client(c);
else
server_write_client(c, MSG_SHUTDOWN, NULL, 0);
}
}
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);
}
}
/* Check if the server should be shutting down (no more clients or windows). */
int
server_should_shutdown(void)
{
u_int i;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if (ARRAY_ITEM(&sessions, i) != NULL)
return (0);
}
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) != NULL)
return (0);
}
return (1);
}
/* Handle SIGCHLD. */
void
server_child_signal(void)
{
struct window *w;
struct window_pane *wp;
struct job *job;
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 failed");
case 0:
return;
}
if (!WIFSTOPPED(status)) {
SLIST_FOREACH(job, &all_jobs, lentry) {
if (pid == job->pid) {
job->pid = -1;
job->status = 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(void)
{
struct window *w;
struct window_pane *wp;
u_int i;
int events;
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)
continue;
events = POLLIN;
if (BUFFER_USED(wp->out) > 0)
events |= POLLOUT;
server_poll_add(wp->fd, events);
if (wp->pipe_fd == -1)
continue;
events = 0;
if (BUFFER_USED(wp->pipe_buf) > 0)
events |= POLLOUT;
server_poll_add(wp->pipe_fd, events);
}
}
}
/* Handle window pollfds. */
void
server_handle_windows(void)
{
struct window *w;
struct window_pane *wp;
struct pollfd *pfd;
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)
continue;
if ((pfd = server_poll_lookup(wp->fd)) == NULL)
continue;
if (buffer_poll(pfd, wp->in, wp->out) != 0) {
close(wp->fd);
wp->fd = -1;
} else
server_handle_window(w, wp);
if (wp->pipe_fd == -1)
continue;
if ((pfd = server_poll_lookup(wp->pipe_fd)) == NULL)
continue;
if (buffer_poll(pfd, NULL, wp->pipe_buf) != 0) {
buffer_destroy(wp->pipe_buf);
close(wp->pipe_fd);
wp->pipe_fd = -1;
}
}
server_check_window(w);
}
}
/* Check clients for redraw and timers. */
void
server_check_clients(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 || c->session == NULL)
continue;
server_check_timers(c);
server_check_redraw(c);
}
/*
* 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;
}
}
/* Check for general redraw on client. */
void
server_check_redraw(struct client *c)
{
struct session *s = c->session;
struct window_pane *wp;
int flags, redraw;
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_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);
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);
}
/* Set client title. */
void
server_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, template, time(NULL));
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);
}
xfree(title);
}
/* Check for timers on client. */
void
server_check_timers(struct client *c)
{
struct session *s = c->session;
struct job *job;
struct timeval tv;
u_int interval;
if (gettimeofday(&tv, NULL) != 0)
fatal("gettimeofday failed");
if (c->flags & CLIENT_IDENTIFY && timercmp(&tv, &c->identify_timer, >))
server_clear_identify(c);
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) {
/* Run the jobs for this client and schedule for redraw. */
RB_FOREACH(job, jobs, &c->status_jobs)
job_run(job);
c->flags |= CLIENT_STATUS;
}
}
/* Fill client pollfds. */
void
server_fill_clients(void)
{
struct client *c;
u_int i;
int events;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c != NULL) {
events = 0;
if (!(c->flags & CLIENT_BAD))
events |= POLLIN;
if (c->ibuf.w.queued > 0)
events |= POLLOUT;
server_poll_add(c->ibuf.fd, events);
}
if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
c->tty.fd != -1 && c->session != NULL) {
events = POLLIN;
if (BUFFER_USED(c->tty.out) > 0)
events |= POLLOUT;
server_poll_add(c->tty.fd, events);
}
}
}
/* Fill in job fds. */
void
server_fill_jobs(void)
{
struct job *job;
SLIST_FOREACH(job, &all_jobs, lentry) {
if (job->fd == -1)
continue;
server_poll_add(job->fd, POLLIN);
}
}
/* Handle job fds. */
void
server_handle_jobs(void)
{
struct job *job;
struct pollfd *pfd;
SLIST_FOREACH(job, &all_jobs, lentry) {
if (job->fd == -1)
continue;
if ((pfd = server_poll_lookup(job->fd)) == NULL)
continue;
if (buffer_poll(pfd, job->out, NULL) != 0) {
close(job->fd);
job->fd = -1;
}
}
}
/* Handle job fds. */
void
server_check_jobs(void)
{
struct job *job;
restart:
SLIST_FOREACH(job, &all_jobs, lentry) {
if (job->flags & JOB_DONE || job->fd != -1 || job->pid != -1)
continue;
job->flags |= JOB_DONE;
if (job->callbackfn != NULL) {
job->callbackfn(job);
goto restart; /* could be freed by callback */
}
}
}
/* Handle client pollfds. */
void
server_handle_clients(void)
{
struct client *c;
struct pollfd *pfd;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c != NULL) {
if ((pfd = server_poll_lookup(c->ibuf.fd)) == NULL)
continue;
if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP)) {
server_lost_client(c);
continue;
}
if (pfd->revents & POLLOUT) {
if (msgbuf_write(&c->ibuf.w) < 0) {
server_lost_client(c);
continue;
}
}
if (c->flags & CLIENT_BAD) {
if (c->ibuf.w.queued == 0)
server_lost_client(c);
continue;
} else if (pfd->revents & POLLIN) {
if (server_msg_dispatch(c) != 0) {
server_lost_client(c);
continue;
}
}
}
if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
c->tty.fd != -1 && c->session != NULL) {
if ((pfd = server_poll_lookup(c->tty.fd)) == NULL)
continue;
if (buffer_poll(pfd, c->tty.in, c->tty.out) != 0)
server_lost_client(c);
else
server_handle_client(c);
}
}
}
/* 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 *w;
struct window_pane *wp;
struct screen *s;
struct options *oo;
struct timeval tv;
struct key_binding *bd;
struct keylist *keylist;
struct mouse_event mouse;
int key, status, xtimeout, mode, isprefix;
u_int i;
xtimeout = options_get_number(&c->session->options, "repeat-time");
if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
if (gettimeofday(&tv, NULL) != 0)
fatal("gettimeofday failed");
if (timercmp(&tv, &c->repeat_timer, >))
c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
}
/* Process keys. */
keylist = options_get_data(&c->session->options, "prefix");
while (tty_keys_next(&c->tty, &key, &mouse) == 0) {
if (c->session == NULL)
return;
c->session->activity = time(NULL);
w = c->session->curw->window;
wp = w->active; /* could die */
oo = &c->session->options;
/* Special case: number keys jump to pane in identify mode. */
if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
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);
continue;
}
status_message_clear(c);
server_clear_identify(c);
if (c->prompt_string != NULL) {
status_prompt_key(c, key);
continue;
}
/* Check for mouse keys. */
if (key == KEYC_MOUSE) {
if (options_get_number(oo, "mouse-select-pane")) {
window_set_active_at(w, mouse.x, mouse.y);
wp = w->active;
}
window_pane_mouse(wp, c, &mouse);
continue;
}
/* Is this a prefix key? */
isprefix = 0;
for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
if (key == ARRAY_ITEM(keylist, i)) {
isprefix = 1;
break;
}
}
/* No previous prefix key. */
if (!(c->flags & CLIENT_PREFIX)) {
if (isprefix)
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 (isprefix)
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 (isprefix)
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 failed");
timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
}
/* Dispatch the command. */
key_bindings_dispatch(bd, c);
}
if (c->session == NULL)
return;
w = c->session->curw->window;
wp = w->active;
oo = &c->session->options;
s = wp->screen;
/*
* Update cursor position and mode settings. The scroll region and
* attributes are cleared across poll(2) 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.
*/
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
tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
mode = s->mode;
if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
options_get_number(oo, "mouse-select-pane"))
mode |= MODE_MOUSE;
tty_update_mode(&c->tty, mode);
tty_reset(&c->tty);
}
/* 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);
}
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);
screen_free(&c->status);
job_tree_free(&c->status_jobs);
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->ibuf.fd);
imsg_clear(&c->ibuf);
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;
recalculate_sizes();
}
/* Free dead, unreferenced clients and sessions. */
void
server_clean_dead(void)
{
struct session *s;
struct client *c;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
s = ARRAY_ITEM(&dead_sessions, i);
if (s == NULL || s->references != 0)
continue;
ARRAY_SET(&dead_sessions, i, NULL);
xfree(s);
}
for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
c = ARRAY_ITEM(&dead_clients, i);
if (c == NULL || c->references != 0)
continue;
ARRAY_SET(&dead_clients, i, NULL);
xfree(c);
}
}
/* 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 options *oo = &w->options;
struct session *s;
struct winlink *wl;
u_int i;
int destroyed;
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 && !options_get_number(oo, "remain-on-exit")) {
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;
if (session_detach(s, wl)) {
server_destroy_session_group(s);
break;
}
server_redraw_session(s);
server_status_session_group(s);
goto restart;
}
}
recalculate_sizes();
}
/* Lock the server if ALL sessions have hit the time limit. */
void
server_lock_server(void)
{
struct session *s;
u_int i;
int timeout;
time_t t;
t = time(NULL);
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if ((s = ARRAY_ITEM(&sessions, i)) == NULL)
continue;
if (s->flags & SESSION_UNATTACHED) {
s->activity = time(NULL);
continue;
}
timeout = options_get_number(&s->options, "lock-after-time");
if (timeout <= 0 || t <= s->activity + timeout)
return; /* not timed out */
}
server_lock();
recalculate_sizes();
}
/* Lock any sessions which have timed out. */
void
server_lock_sessions(void)
{
struct session *s;
u_int i;
int timeout;
time_t t;
t = time(NULL);
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if ((s = ARRAY_ITEM(&sessions, i)) == NULL)
continue;
if (s->flags & SESSION_UNATTACHED) {
s->activity = time(NULL);
continue;
}
timeout = options_get_number(&s->options, "lock-after-time");
if (timeout > 0 && t > s->activity + timeout) {
server_lock_session(s);
recalculate_sizes();
}
}
}
/* Call any once-per-second timers. */
void
server_second_timers(void)
{
struct window *w;
struct window_pane *wp;
u_int i;
if (options_get_number(&global_s_options, "lock-server"))
server_lock_server();
else
server_lock_sessions();
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);
}
}
}
/* 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);
}