mirror of
https://github.com/tmux/tmux.git
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b5349ab5d9
Two new options: - server option "exit-unattached" makes the server exit when no clients are attached, even if sessions are present; - session option "destroy-unattached" destroys a session once no clients are attached to it. These are useful for preventing tmux remaining in the background where it is undesirable and when using tmux as a login shell to keep a limit on new sessions.
478 lines
10 KiB
C
478 lines
10 KiB
C
/* $Id: server-fn.c,v 1.111 2010-10-09 14:29:32 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 <string.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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struct session *server_next_session(struct session *);
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void server_callback_identify(int, short, void *);
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void
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server_fill_environ(struct session *s, struct environ *env)
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{
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char tmuxvar[MAXPATHLEN], *term;
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u_int idx;
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if (session_index(s, &idx) != 0)
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fatalx("session not found");
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xsnprintf(tmuxvar, sizeof tmuxvar,
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"%s,%ld,%u", socket_path, (long) getpid(), idx);
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environ_set(env, "TMUX", tmuxvar);
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term = options_get_string(&s->options, "default-terminal");
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environ_set(env, "TERM", term);
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}
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void
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server_write_client(
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struct client *c, enum msgtype type, const void *buf, size_t len)
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{
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struct imsgbuf *ibuf = &c->ibuf;
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if (c->flags & CLIENT_BAD)
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return;
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log_debug("writing %d to client %d", type, c->ibuf.fd);
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imsg_compose(ibuf, type, PROTOCOL_VERSION, -1, -1, (void *) buf, len);
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server_update_event(c);
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}
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void
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server_write_session(
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struct session *s, enum msgtype type, const void *buf, size_t len)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL)
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continue;
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if (c->session == s)
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server_write_client(c, type, buf, len);
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}
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}
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void
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server_redraw_client(struct client *c)
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{
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c->flags |= CLIENT_REDRAW;
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}
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void
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server_status_client(struct client *c)
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{
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c->flags |= CLIENT_STATUS;
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}
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void
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server_redraw_session(struct session *s)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL)
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continue;
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if (c->session == s)
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server_redraw_client(c);
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}
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}
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void
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server_redraw_session_group(struct session *s)
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{
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struct session_group *sg;
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if ((sg = session_group_find(s)) == NULL)
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server_redraw_session(s);
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else {
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TAILQ_FOREACH(s, &sg->sessions, gentry)
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server_redraw_session(s);
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}
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}
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void
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server_status_session(struct session *s)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL)
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continue;
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if (c->session == s)
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server_status_client(c);
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}
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}
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void
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server_status_session_group(struct session *s)
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{
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struct session_group *sg;
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if ((sg = session_group_find(s)) == NULL)
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server_status_session(s);
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else {
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TAILQ_FOREACH(s, &sg->sessions, gentry)
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server_status_session(s);
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}
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}
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void
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server_redraw_window(struct window *w)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL)
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continue;
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if (c->session->curw->window == w)
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server_redraw_client(c);
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}
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w->flags |= WINDOW_REDRAW;
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}
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void
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server_redraw_window_borders(struct window *w)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL)
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continue;
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if (c->session->curw->window == w)
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c->flags |= CLIENT_BORDERS;
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}
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}
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void
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server_status_window(struct window *w)
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{
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struct session *s;
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u_int i;
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/*
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* This is slightly different. We want to redraw the status line of any
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* clients containing this window rather than any where it is the
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* current window.
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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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if (s != NULL && session_has(s, w) != NULL)
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server_status_session(s);
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}
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}
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void
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server_lock(void)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL)
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continue;
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server_lock_client(c);
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}
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}
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void
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server_lock_session(struct session *s)
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{
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struct client *c;
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u_int i;
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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 || c->session == NULL || c->session != s)
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continue;
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server_lock_client(c);
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}
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}
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void
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server_lock_client(struct client *c)
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{
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const char *cmd;
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size_t cmdlen;
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struct msg_lock_data lockdata;
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if (c->flags & CLIENT_SUSPENDED)
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return;
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cmd = options_get_string(&c->session->options, "lock-command");
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cmdlen = strlcpy(lockdata.cmd, cmd, sizeof lockdata.cmd);
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if (cmdlen >= sizeof lockdata.cmd)
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return;
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tty_stop_tty(&c->tty);
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tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
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tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
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c->flags |= CLIENT_SUSPENDED;
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server_write_client(c, MSG_LOCK, &lockdata, sizeof lockdata);
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}
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void
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server_kill_window(struct window *w)
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{
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struct session *s;
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struct winlink *wl;
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u_int i;
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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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if (s == NULL || session_has(s, w) == NULL)
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continue;
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while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
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if (session_detach(s, wl)) {
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server_destroy_session_group(s);
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break;
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} else
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server_redraw_session_group(s);
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}
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}
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}
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int
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server_link_window(struct session *src, struct winlink *srcwl,
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struct session *dst, int dstidx, int killflag, int selectflag, char **cause)
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{
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struct winlink *dstwl;
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struct session_group *srcsg, *dstsg;
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srcsg = session_group_find(src);
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dstsg = session_group_find(dst);
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if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
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xasprintf(cause, "sessions are grouped");
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return (-1);
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}
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dstwl = NULL;
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if (dstidx != -1)
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dstwl = winlink_find_by_index(&dst->windows, dstidx);
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if (dstwl != NULL) {
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if (dstwl->window == srcwl->window)
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return (-1);
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if (killflag) {
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/*
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* Can't use session_detach as it will destroy session
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* if this makes it empty.
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*/
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dstwl->flags &= ~WINLINK_ALERTFLAGS;
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winlink_stack_remove(&dst->lastw, dstwl);
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winlink_remove(&dst->windows, dstwl);
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/* Force select/redraw if current. */
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if (dstwl == dst->curw) {
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selectflag = 1;
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dst->curw = NULL;
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}
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}
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}
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if (dstidx == -1)
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dstidx = -1 - options_get_number(&dst->options, "base-index");
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dstwl = session_attach(dst, srcwl->window, dstidx, cause);
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if (dstwl == NULL)
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return (-1);
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if (selectflag)
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session_select(dst, dstwl->idx);
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server_redraw_session_group(dst);
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return (0);
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}
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void
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server_unlink_window(struct session *s, struct winlink *wl)
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{
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if (session_detach(s, wl))
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server_destroy_session_group(s);
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else
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server_redraw_session_group(s);
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}
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void
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server_destroy_pane(struct window_pane *wp)
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{
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struct window *w = wp->window;
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if (wp->fd != -1) {
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close(wp->fd);
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bufferevent_free(wp->event);
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wp->fd = -1;
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}
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if (options_get_number(&w->options, "remain-on-exit"))
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return;
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layout_close_pane(wp);
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window_remove_pane(w, wp);
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if (TAILQ_EMPTY(&w->panes))
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server_kill_window(w);
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else
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server_redraw_window(w);
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}
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void
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server_destroy_session_group(struct session *s)
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{
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struct session_group *sg;
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if ((sg = session_group_find(s)) == NULL)
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server_destroy_session(s);
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else {
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TAILQ_FOREACH(s, &sg->sessions, gentry)
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server_destroy_session(s);
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TAILQ_REMOVE(&session_groups, sg, entry);
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xfree(sg);
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}
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}
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struct session *
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server_next_session(struct session *s)
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{
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struct session *s_loop, *s_out;
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u_int i;
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s_out = NULL;
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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s_loop = ARRAY_ITEM(&sessions, i);
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if (s_loop == s)
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continue;
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if (s_out == NULL ||
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timercmp(&s_loop->activity_time, &s_out->activity_time, <))
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s_out = s_loop;
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}
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return (s_out);
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}
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void
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server_destroy_session(struct session *s)
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{
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struct client *c;
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struct session *s_new;
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u_int i;
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if (!options_get_number(&s->options, "detach-on-destroy"))
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s_new = server_next_session(s);
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else
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s_new = NULL;
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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 || c->session != s)
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continue;
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if (s_new == NULL) {
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c->session = NULL;
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c->flags |= CLIENT_EXIT;
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} else {
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c->session = s_new;
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server_redraw_client(c);
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}
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}
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recalculate_sizes();
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}
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void
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server_check_unattached (void)
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{
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struct session *s;
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u_int i;
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/*
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* If any sessions are no longer attached and have destroy-unattached
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* set, collect them.
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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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if (s == NULL || !(s->flags & SESSION_UNATTACHED))
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continue;
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if (options_get_number (&s->options, "destroy-unattached"))
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session_destroy(s);
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}
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}
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void
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server_set_identify(struct client *c)
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{
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struct timeval tv;
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int delay;
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delay = options_get_number(&c->session->options, "display-panes-time");
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tv.tv_sec = delay / 1000;
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tv.tv_usec = (delay % 1000) * 1000L;
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evtimer_del(&c->identify_timer);
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evtimer_set(&c->identify_timer, server_callback_identify, c);
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evtimer_add(&c->identify_timer, &tv);
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c->flags |= CLIENT_IDENTIFY;
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c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
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server_redraw_client(c);
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}
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void
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server_clear_identify(struct client *c)
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{
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if (c->flags & CLIENT_IDENTIFY) {
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c->flags &= ~CLIENT_IDENTIFY;
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c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
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server_redraw_client(c);
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}
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}
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/* ARGSUSED */
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void
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server_callback_identify(unused int fd, unused short events, void *data)
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{
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struct client *c = data;
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server_clear_identify(c);
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}
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void
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server_update_event(struct client *c)
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{
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short events;
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events = 0;
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if (!(c->flags & CLIENT_BAD))
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events |= EV_READ;
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if (c->ibuf.w.queued > 0)
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events |= EV_WRITE;
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event_del(&c->event);
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event_set(&c->event, c->ibuf.fd, events, server_client_callback, c);
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event_add(&c->event, NULL);
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}
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