tmux/server-fn.c

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/* $OpenBSD$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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/queue.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <imsg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
static struct session *server_next_session(struct session *);
static void server_destroy_session_group(struct session *);
void
server_redraw_client(struct client *c)
{
c->flags |= CLIENT_ALLREDRAWFLAGS;
}
void
server_status_client(struct client *c)
{
c->flags |= CLIENT_REDRAWSTATUS;
}
void
server_redraw_session(struct session *s)
{
struct client *c;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session == s)
server_redraw_client(c);
}
}
void
server_redraw_session_group(struct session *s)
{
struct session_group *sg;
if ((sg = session_group_contains(s)) == NULL)
server_redraw_session(s);
else {
TAILQ_FOREACH(s, &sg->sessions, gentry)
server_redraw_session(s);
}
}
void
server_status_session(struct session *s)
{
struct client *c;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session == s)
server_status_client(c);
}
}
void
server_status_session_group(struct session *s)
{
struct session_group *sg;
if ((sg = session_group_contains(s)) == NULL)
server_status_session(s);
else {
TAILQ_FOREACH(s, &sg->sessions, gentry)
server_status_session(s);
}
}
void
server_redraw_window(struct window *w)
{
struct client *c;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session != NULL && c->session->curw->window == w)
server_redraw_client(c);
}
}
void
server_redraw_window_borders(struct window *w)
{
struct client *c;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session != NULL && c->session->curw->window == w)
c->flags |= CLIENT_REDRAWBORDERS;
}
}
void
server_status_window(struct window *w)
{
struct session *s;
/*
* This is slightly different. We want to redraw the status line of any
* clients containing this window rather than anywhere it is the
* current window.
*/
RB_FOREACH(s, sessions, &sessions) {
if (session_has(s, w))
server_status_session(s);
}
}
void
server_lock(void)
{
struct client *c;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session != NULL)
server_lock_client(c);
}
}
void
server_lock_session(struct session *s)
{
struct client *c;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session == s)
server_lock_client(c);
}
}
void
server_lock_client(struct client *c)
{
const char *cmd;
if (c->flags & CLIENT_CONTROL)
return;
if (c->flags & CLIENT_SUSPENDED)
return;
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cmd = options_get_string(c->session->options, "lock-command");
if (*cmd == '\0' || strlen(cmd) + 1 > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
return;
tty_stop_tty(&c->tty);
tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_E3));
c->flags |= CLIENT_SUSPENDED;
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proc_send(c->peer, MSG_LOCK, -1, cmd, strlen(cmd) + 1);
}
void
server_kill_pane(struct window_pane *wp)
{
struct window *w = wp->window;
if (window_count_panes(w) == 1) {
server_kill_window(w);
recalculate_sizes();
} else {
server_unzoom_window(w);
layout_close_pane(wp);
window_remove_pane(w, wp);
server_redraw_window(w);
}
}
void
server_kill_window(struct window *w)
{
struct session *s, *next_s, *target_s;
struct session_group *sg;
struct winlink *wl;
next_s = RB_MIN(sessions, &sessions);
while (next_s != NULL) {
s = next_s;
next_s = RB_NEXT(sessions, &sessions, s);
if (!session_has(s, w))
continue;
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server_unzoom_window(w);
while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
if (session_detach(s, wl)) {
server_destroy_session_group(s);
break;
} else
server_redraw_session_group(s);
}
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if (options_get_number(s->options, "renumber-windows")) {
if ((sg = session_group_contains(s)) != NULL) {
TAILQ_FOREACH(target_s, &sg->sessions, gentry)
session_renumber_windows(target_s);
} else
session_renumber_windows(s);
}
}
recalculate_sizes();
}
int
server_link_window(struct session *src, struct winlink *srcwl,
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struct session *dst, int dstidx, int killflag, int selectflag,
char **cause)
{
struct winlink *dstwl;
struct session_group *srcsg, *dstsg;
srcsg = session_group_contains(src);
dstsg = session_group_contains(dst);
if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
xasprintf(cause, "sessions are grouped");
return (-1);
}
dstwl = NULL;
if (dstidx != -1)
dstwl = winlink_find_by_index(&dst->windows, dstidx);
if (dstwl != NULL) {
if (dstwl->window == srcwl->window) {
xasprintf(cause, "same index: %d", dstidx);
return (-1);
}
if (killflag) {
/*
* Can't use session_detach as it will destroy session
* if this makes it empty.
*/
notify_session_window("window-unlinked", dst,
dstwl->window);
dstwl->flags &= ~WINLINK_ALERTFLAGS;
winlink_stack_remove(&dst->lastw, dstwl);
winlink_remove(&dst->windows, dstwl);
/* Force select/redraw if current. */
if (dstwl == dst->curw) {
selectflag = 1;
dst->curw = NULL;
}
}
}
if (dstidx == -1)
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dstidx = -1 - options_get_number(dst->options, "base-index");
dstwl = session_attach(dst, srcwl->window, dstidx, cause);
if (dstwl == NULL)
return (-1);
if (selectflag)
session_select(dst, dstwl->idx);
server_redraw_session_group(dst);
return (0);
}
void
server_unlink_window(struct session *s, struct winlink *wl)
{
if (session_detach(s, wl))
server_destroy_session_group(s);
else
server_redraw_session_group(s);
}
void
server_destroy_pane(struct window_pane *wp, int notify)
{
struct window *w = wp->window;
struct screen_write_ctx ctx;
struct grid_cell gc;
time_t t;
char tim[26];
if (wp->fd != -1) {
bufferevent_free(wp->event);
wp->event = NULL;
close(wp->fd);
wp->fd = -1;
}
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if (options_get_number(w->options, "remain-on-exit")) {
if (~wp->flags & PANE_STATUSREADY)
return;
if (wp->flags & PANE_STATUSDRAWN)
return;
wp->flags |= PANE_STATUSDRAWN;
if (notify)
notify_pane("pane-died", wp);
screen_write_start(&ctx, wp, &wp->base);
screen_write_scrollregion(&ctx, 0, screen_size_y(ctx.s) - 1);
screen_write_cursormove(&ctx, 0, screen_size_y(ctx.s) - 1, 0);
screen_write_linefeed(&ctx, 1, 8);
memcpy(&gc, &grid_default_cell, sizeof gc);
time(&t);
ctime_r(&t, tim);
if (WIFEXITED(wp->status)) {
screen_write_nputs(&ctx, -1, &gc,
"Pane is dead (status %d, %s)",
WEXITSTATUS(wp->status),
tim);
} else if (WIFSIGNALED(wp->status)) {
screen_write_nputs(&ctx, -1, &gc,
"Pane is dead (signal %d, %s)",
WTERMSIG(wp->status),
tim);
}
screen_write_stop(&ctx);
wp->flags |= PANE_REDRAW;
return;
}
if (notify)
notify_pane("pane-exited", wp);
server_unzoom_window(w);
layout_close_pane(wp);
window_remove_pane(w, wp);
if (TAILQ_EMPTY(&w->panes))
server_kill_window(w);
else
server_redraw_window(w);
}
static void
server_destroy_session_group(struct session *s)
{
struct session_group *sg;
struct session *s1;
if ((sg = session_group_contains(s)) == NULL)
server_destroy_session(s);
else {
TAILQ_FOREACH_SAFE(s, &sg->sessions, gentry, s1) {
server_destroy_session(s);
session_destroy(s, 1, __func__);
}
}
}
static struct session *
server_next_session(struct session *s)
{
struct session *s_loop, *s_out;
s_out = NULL;
RB_FOREACH(s_loop, sessions, &sessions) {
if (s_loop == s)
continue;
if (s_out == NULL ||
timercmp(&s_loop->activity_time, &s_out->activity_time, <))
s_out = s_loop;
}
return (s_out);
}
void
server_destroy_session(struct session *s)
{
struct client *c;
struct session *s_new;
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if (!options_get_number(s->options, "detach-on-destroy"))
s_new = server_next_session(s);
else
s_new = NULL;
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TAILQ_FOREACH(c, &clients, entry) {
if (c->session != s)
continue;
if (s_new == NULL) {
c->session = NULL;
c->flags |= CLIENT_EXIT;
} else {
c->last_session = NULL;
c->session = s_new;
server_client_set_key_table(c, NULL);
Support for windows larger than visible on the attached client. This has been a limitation for a long time. There are two new options, window-size and default-size, and a new command, resize-window. The force-width and force-height options and the session_width and session_height formats have been removed. The new window-size option tells tmux how to work out the size of windows: largest means it picks the size of the largest session, smallest the smallest session (similar to the old behaviour) and manual means that it does not automatically resize windows. The default is currently largest but this may change. aggressive-resize modifies the choice of session for largest and smallest as it did before. If a window is in a session attached to a client that is too small, only part of the window is shown. tmux attempts to keep the cursor visible, so the part of the window displayed is changed as the cursor moves (with a small delay, to try and avoid excess redrawing when applications redraw status lines or similar that are not currently visible). The offset of the visible portion of the window is shown in status-right. Drawing windows which are larger than the client is not as efficient as those which fit, particularly when the cursor moves, so it is recommended to avoid using this on slow machines or networks (set window-size to smallest or manual). The resize-window command can be used to resize a window manually. If it is used, the window-size option is automatically set to manual for the window (undo this with "setw -u window-size"). resize-window works in a similar way to resize-pane (-U -D -L -R -x -y flags) but also has -a and -A flags. -a sets the window to the size of the smallest client (what it would be if window-size was smallest) and -A the largest. For the same behaviour as force-width or force-height, use resize-window -x or -y, and "setw -u window-size" to revert to automatic sizing.. If the global window-size option is set to manual, the default-size option is used for new windows. If -x or -y is used with new-session, that sets the default-size option for the new session. The maximum size of a window is 10000x10000. But expect applications to complain and much higher memory use if making a window excessively big. The minimum size is the size required for the current layout including borders. The refresh-client command can be used to pan around a window, -U -D -L -R moves up, down, left or right and -c returns to automatic cursor tracking. The position is reset when the current window is changed.
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tty_update_client_offset(c);
status_timer_start(c);
notify_client("client-session-changed", c);
session_update_activity(s_new, NULL);
gettimeofday(&s_new->last_attached_time, NULL);
server_redraw_client(c);
alerts_check_session(s_new);
}
}
recalculate_sizes();
}
void
server_check_unattached(void)
{
struct session *s;
/*
* If any sessions are no longer attached and have destroy-unattached
* set, collect them.
*/
RB_FOREACH(s, sessions, &sessions) {
if (s->attached != 0)
continue;
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if (options_get_number (s->options, "destroy-unattached"))
session_destroy(s, 1, __func__);
}
}
int
server_set_stdin_callback(struct client *c, void (*cb)(struct client *, int,
void *), void *cb_data, char **cause)
{
if (c == NULL || c->session != NULL) {
*cause = xstrdup("no client with stdin");
return (-1);
}
if (c->flags & CLIENT_TERMINAL) {
*cause = xstrdup("stdin is a tty");
return (-1);
}
if (c->stdin_callback != NULL) {
*cause = xstrdup("stdin is in use");
return (-1);
}
c->stdin_callback_data = cb_data;
c->stdin_callback = cb;
c->references++;
if (c->stdin_closed)
c->stdin_callback(c, 1, c->stdin_callback_data);
proc_send(c->peer, MSG_STDIN, -1, NULL, 0);
return (0);
}
void
server_unzoom_window(struct window *w)
{
if (window_unzoom(w) == 0)
server_redraw_window(w);
}