mirror of
https://github.com/tmux/tmux.git
synced 2025-11-04 09:44:18 +00:00
bc236109fd
Rather than running status-left, status-right and window title #() with popen immediately every redraw, queue them up and run them in the background, starting each once every status-interval. The actual status line uses the output from the last run. This brings several advantages: - tmux itself may be called from inside #() without causing the server to hang; - likewise, sleep or similar doesn't cause the server to block; - commands aren't run excessively often when redrawing; - commands shared by status-left and status-right, or used multiple times, will only be run once. run-shell and if-shell still use system()/popen() but will be changed over to use this too later.
1445 lines
32 KiB
C
1445 lines
32 KiB
C
/* $Id: server.c,v 1.200 2009-10-11 23:55:26 tcunha Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/un.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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#include "tmux.h"
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/*
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* Main server functions.
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*/
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/* Client list. */
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struct clients clients;
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struct clients dead_clients;
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/* Mapping of a pollfd to an fd independent of its position in the array. */
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struct poll_item {
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struct pollfd pfd;
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RB_ENTRY(poll_item) entry;
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};
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RB_HEAD(poll_items, poll_item) poll_items;
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int server_poll_cmp(struct poll_item *, struct poll_item *);
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struct pollfd *server_poll_lookup(int);
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void server_poll_add(int, int);
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struct pollfd *server_poll_flatten(int *);
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void server_poll_parse(struct pollfd *);
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void server_poll_reset(void);
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RB_PROTOTYPE(poll_items, poll_item, entry, server_poll_cmp);
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RB_GENERATE(poll_items, poll_item, entry, server_poll_cmp);
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void server_create_client(int);
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int server_create_socket(void);
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int server_main(int);
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void server_shutdown(void);
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int server_should_shutdown(void);
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void server_child_signal(void);
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void server_fill_windows(void);
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void server_handle_windows(void);
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void server_fill_clients(void);
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void server_handle_clients(void);
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void server_fill_jobs(void);
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void server_fill_jobs1(struct jobs *);
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void server_handle_jobs(void);
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void server_handle_jobs1(struct jobs *);
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void server_accept_client(int);
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void server_handle_client(struct client *);
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void server_handle_window(struct window *, struct window_pane *);
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int server_check_window_bell(struct session *, struct window *);
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int server_check_window_activity(struct session *,
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struct window *);
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int server_check_window_content(struct session *, struct window *,
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struct window_pane *);
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void server_clean_dead(void);
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void server_lost_client(struct client *);
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void server_check_window(struct window *);
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void server_check_redraw(struct client *);
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void server_set_title(struct client *);
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void server_check_timers(struct client *);
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void server_lock_server(void);
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void server_lock_sessions(void);
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void server_second_timers(void);
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int server_update_socket(void);
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int
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server_poll_cmp(struct poll_item *pitem1, struct poll_item *pitem2)
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{
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return (pitem1->pfd.fd - pitem2->pfd.fd);
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}
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struct pollfd *
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server_poll_lookup(int fd)
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{
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struct poll_item pitem;
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pitem.pfd.fd = fd;
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return (&RB_FIND(poll_items, &poll_items, &pitem)->pfd);
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}
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void
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server_poll_add(int fd, int events)
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{
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struct poll_item *pitem;
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pitem = xmalloc(sizeof *pitem);
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pitem->pfd.fd = fd;
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pitem->pfd.events = events;
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RB_INSERT(poll_items, &poll_items, pitem);
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}
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struct pollfd *
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server_poll_flatten(int *nfds)
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{
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struct poll_item *pitem;
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struct pollfd *pfds;
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pfds = NULL;
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*nfds = 0;
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RB_FOREACH(pitem, poll_items, &poll_items) {
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pfds = xrealloc(pfds, (*nfds) + 1, sizeof *pfds);
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pfds[*nfds].fd = pitem->pfd.fd;
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pfds[*nfds].events = pitem->pfd.events;
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(*nfds)++;
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}
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return (pfds);
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}
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void
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server_poll_parse(struct pollfd *pfds)
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{
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struct poll_item *pitem;
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int nfds;
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nfds = 0;
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RB_FOREACH(pitem, poll_items, &poll_items) {
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pitem->pfd.revents = pfds[nfds].revents;
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nfds++;
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}
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xfree(pfds);
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}
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void
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server_poll_reset(void)
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{
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struct poll_item *pitem;
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while (!RB_EMPTY(&poll_items)) {
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pitem = RB_ROOT(&poll_items);
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RB_REMOVE(poll_items, &poll_items, pitem);
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xfree(pitem);
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}
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}
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/* Create a new client. */
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void
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server_create_client(int fd)
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{
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struct client *c;
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int mode;
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u_int i;
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if ((mode = fcntl(fd, F_GETFL)) == -1)
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fatal("fcntl failed");
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if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
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fatal("fcntl failed");
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if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
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fatal("fcntl failed");
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c = xcalloc(1, sizeof *c);
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c->references = 0;
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imsg_init(&c->ibuf, fd);
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if (gettimeofday(&c->tv, NULL) != 0)
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fatal("gettimeofday failed");
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ARRAY_INIT(&c->prompt_hdata);
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c->tty.fd = -1;
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c->title = NULL;
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c->session = NULL;
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c->tty.sx = 80;
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c->tty.sy = 24;
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screen_init(&c->status, c->tty.sx, 1, 0);
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job_tree_init(&c->status_jobs);
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c->message_string = NULL;
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c->prompt_string = NULL;
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c->prompt_buffer = NULL;
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c->prompt_index = 0;
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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if (ARRAY_ITEM(&clients, i) == NULL) {
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ARRAY_SET(&clients, i, c);
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return;
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}
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}
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ARRAY_ADD(&clients, c);
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log_debug("new client %d", fd);
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}
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/* Fork new server. */
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int
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server_start(char *path)
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{
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struct client *c;
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int pair[2], srv_fd;
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char *cause;
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#ifdef HAVE_SETPROCTITLE
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char rpathbuf[MAXPATHLEN];
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#endif
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/* The first client is special and gets a socketpair; create it. */
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if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
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fatal("socketpair failed");
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switch (fork()) {
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case -1:
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fatal("fork failed");
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case 0:
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break;
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default:
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close(pair[1]);
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return (pair[0]);
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}
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close(pair[0]);
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/*
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* Must daemonise before loading configuration as the PID changes so
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* $TMUX would be wrong for sessions created in the config file.
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*/
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if (daemon(1, 0) != 0)
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fatal("daemon failed");
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logfile("server");
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log_debug("server started, pid %ld", (long) getpid());
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ARRAY_INIT(&windows);
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ARRAY_INIT(&clients);
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ARRAY_INIT(&dead_clients);
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ARRAY_INIT(&sessions);
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ARRAY_INIT(&dead_sessions);
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TAILQ_INIT(&session_groups);
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mode_key_init_trees();
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key_bindings_init();
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utf8_build();
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start_time = time(NULL);
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socket_path = path;
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#ifdef HAVE_SETPROCTITLE
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if (realpath(socket_path, rpathbuf) == NULL)
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strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
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log_debug("socket path %s", socket_path);
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setproctitle("server (%s)", rpathbuf);
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#endif
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srv_fd = server_create_socket();
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server_create_client(pair[1]);
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if (access(SYSTEM_CFG, R_OK) != 0) {
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if (errno != ENOENT) {
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xasprintf(
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&cause, "%s: %s", strerror(errno), SYSTEM_CFG);
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goto error;
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}
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} else if (load_cfg(SYSTEM_CFG, NULL, &cause) != 0)
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goto error;
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if (cfg_file != NULL && load_cfg(cfg_file, NULL, &cause) != 0)
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goto error;
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exit(server_main(srv_fd));
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error:
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/* Write the error and shutdown the server. */
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c = ARRAY_FIRST(&clients);
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server_write_error(c, cause);
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xfree(cause);
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sigterm = 1;
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server_shutdown();
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exit(server_main(srv_fd));
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}
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/* Create server socket. */
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int
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server_create_socket(void)
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{
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struct sockaddr_un sa;
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size_t size;
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mode_t mask;
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int fd, mode;
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memset(&sa, 0, sizeof sa);
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sa.sun_family = AF_UNIX;
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size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
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if (size >= sizeof sa.sun_path) {
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errno = ENAMETOOLONG;
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fatal("socket failed");
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}
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unlink(sa.sun_path);
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if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
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fatal("socket failed");
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mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
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if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
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fatal("bind failed");
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umask(mask);
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if (listen(fd, 16) == -1)
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fatal("listen failed");
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if ((mode = fcntl(fd, F_GETFL)) == -1)
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fatal("fcntl failed");
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if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
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fatal("fcntl failed");
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if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
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fatal("fcntl failed");
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return (fd);
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}
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/* Main server loop. */
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int
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server_main(int srv_fd)
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{
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struct pollfd *pfds, *pfd;
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int nfds, xtimeout;
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u_int i;
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time_t now, last;
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siginit();
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log_debug("server socket is %d", srv_fd);
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last = time(NULL);
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pfds = NULL;
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for (;;) {
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/* If sigterm, kill all windows and clients. */
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if (sigterm)
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server_shutdown();
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/* Stop if no sessions or clients left. */
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if (server_should_shutdown())
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break;
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/* Handle child exit. */
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if (sigchld) {
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server_child_signal();
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sigchld = 0;
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}
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/* Recreate socket on SIGUSR1. */
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if (sigusr1) {
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close(srv_fd);
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srv_fd = server_create_socket();
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sigusr1 = 0;
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}
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/* Initialise pollfd array and add server socket. */
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server_poll_reset();
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server_poll_add(srv_fd, POLLIN);
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/* Fill window and client sockets. */
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server_fill_jobs();
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server_fill_windows();
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server_fill_clients();
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/* Update socket permissions. */
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xtimeout = INFTIM;
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if (server_update_socket() != 0)
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xtimeout = POLL_TIMEOUT;
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/* Do the poll. */
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pfds = server_poll_flatten(&nfds);
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log_debug("polling %d", nfds);
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if (poll(pfds, nfds, xtimeout) == -1) {
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if (errno == EAGAIN || errno == EINTR)
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continue;
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fatal("poll failed");
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}
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server_poll_parse(pfds);
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/* Handle server socket. */
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pfd = server_poll_lookup(srv_fd);
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if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
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fatalx("lost server socket");
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if (pfd->revents & POLLIN) {
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server_accept_client(srv_fd);
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continue;
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}
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/* Call second-based timers. */
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now = time(NULL);
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if (now != last) {
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last = now;
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server_second_timers();
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}
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/* Set window names. */
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set_window_names();
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/*
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* Handle window and client sockets. Clients can create
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* windows, so windows must come first to avoid messing up by
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* increasing the array size.
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*/
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server_handle_jobs();
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server_handle_windows();
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server_handle_clients();
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/* Collect any unset key bindings. */
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key_bindings_clean();
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/* Collect dead clients and sessions. */
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server_clean_dead();
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}
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server_poll_reset();
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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if (ARRAY_ITEM(&sessions, i) != NULL)
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session_destroy(ARRAY_ITEM(&sessions, i));
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}
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ARRAY_FREE(&sessions);
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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if (ARRAY_ITEM(&clients, i) != NULL)
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server_lost_client(ARRAY_ITEM(&clients, i));
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}
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ARRAY_FREE(&clients);
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mode_key_free_trees();
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key_bindings_free();
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close(srv_fd);
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unlink(socket_path);
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xfree(socket_path);
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options_free(&global_s_options);
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options_free(&global_w_options);
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return (0);
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}
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/* Kill all clients. */
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void
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server_shutdown(void)
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{
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struct session *s;
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struct client *c;
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u_int i, j;
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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c = ARRAY_ITEM(&clients, i);
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if (c != NULL) {
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if (c->flags & (CLIENT_BAD|CLIENT_SUSPENDED))
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server_lost_client(c);
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else
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server_write_client(c, MSG_SHUTDOWN, NULL, 0);
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}
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}
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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s = ARRAY_ITEM(&sessions, i);
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for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
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c = ARRAY_ITEM(&clients, j);
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if (c != NULL && c->session == s) {
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s = NULL;
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break;
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}
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}
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if (s != NULL)
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session_destroy(s);
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}
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}
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/* Check if the server should be shutting down (no more clients or windows). */
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int
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server_should_shutdown(void)
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{
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u_int i;
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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if (ARRAY_ITEM(&sessions, i) != NULL)
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return (0);
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}
|
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
|
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if (ARRAY_ITEM(&clients, i) != NULL)
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return (0);
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}
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return (1);
|
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}
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|
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/* Handle SIGCHLD. */
|
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void
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server_child_signal(void)
|
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{
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struct window *w;
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struct window_pane *wp;
|
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int status;
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pid_t pid;
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u_int i;
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|
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for (;;) {
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switch (pid = waitpid(WAIT_ANY, &status, WNOHANG|WUNTRACED)) {
|
|
case -1:
|
|
if (errno == ECHILD)
|
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return;
|
|
fatal("waitpid failed");
|
|
case 0:
|
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return;
|
|
}
|
|
if (!WIFSTOPPED(status))
|
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continue;
|
|
if (WSTOPSIG(status) == SIGTTIN || WSTOPSIG(status) == SIGTTOU)
|
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continue;
|
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|
|
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
|
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w = ARRAY_ITEM(&windows, i);
|
|
if (w == NULL)
|
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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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
server_check_window(w);
|
|
}
|
|
}
|
|
|
|
/* Check for general redraw on client. */
|
|
void
|
|
server_check_redraw(struct client *c)
|
|
{
|
|
struct session *s;
|
|
struct window_pane *wp;
|
|
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 (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;
|
|
struct job *job;
|
|
struct timeval tv;
|
|
u_int interval;
|
|
|
|
if (c == NULL || c->session == NULL)
|
|
return;
|
|
s = c->session;
|
|
|
|
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;
|
|
struct window *w;
|
|
struct window_pane *wp;
|
|
u_int i;
|
|
int events;
|
|
|
|
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
|
|
c = ARRAY_ITEM(&clients, i);
|
|
|
|
server_check_timers(c);
|
|
server_check_redraw(c);
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
}
|
|
|
|
/* Fill in job fds. */
|
|
void
|
|
server_fill_jobs(void)
|
|
{
|
|
struct client *c;
|
|
u_int i;
|
|
|
|
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
|
|
c = ARRAY_ITEM(&clients, i);
|
|
if (c != NULL)
|
|
server_fill_jobs1(&c->status_jobs);
|
|
}
|
|
}
|
|
|
|
void
|
|
server_fill_jobs1(struct jobs *jobs)
|
|
{
|
|
struct job *job;
|
|
|
|
RB_FOREACH(job, jobs, jobs) {
|
|
if (job->fd == -1)
|
|
continue;
|
|
server_poll_add(job->fd, POLLIN);
|
|
}
|
|
}
|
|
|
|
/* Handle job fds. */
|
|
void
|
|
server_handle_jobs(void)
|
|
{
|
|
struct client *c;
|
|
u_int i;
|
|
|
|
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
|
|
c = ARRAY_ITEM(&clients, i);
|
|
if (c != NULL)
|
|
server_handle_jobs1(&c->status_jobs);
|
|
}
|
|
}
|
|
|
|
void
|
|
server_handle_jobs1(struct jobs *jobs)
|
|
{
|
|
struct job *job;
|
|
struct pollfd *pfd;
|
|
|
|
RB_FOREACH(job, jobs, jobs) {
|
|
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;
|
|
if (job->callbackfn != NULL)
|
|
job->callbackfn(job);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
int key, status, xtimeout, mode, isprefix;
|
|
u_int i;
|
|
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 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[1], mouse[2]);
|
|
wp = w->active;
|
|
}
|
|
window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
|
|
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.
|
|
*/
|
|
status = options_get_number(oo, "status");
|
|
tty_region(&c->tty, 0, c->tty.sy - 1, 0);
|
|
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 (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;
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|