/usr/src/usr.bin/tmux/server-client.c

Bug Summary

File:	src/usr.bin/tmux/server-client.c
Warning:	line 1753, column 18 Access to field 'cx' results in a dereference of a null pointer (loaded from variable 's')
Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name server-client.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.bin/tmux/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/usr.bin/tmux -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.bin/tmux/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.bin/tmux/server-client.c
1/* $OpenBSD: server-client.c,v 1.390 2021/11/15 10:58:13 nicm Exp $ */

3/*
* Copyright (c) 2009 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.
*/

19#include <sys/types.h>
20#include <sys/ioctl.h>
21#include <sys/uio.h>

23#include <errno(*__errno()).h>
24#include <event.h>
25#include <fcntl.h>
26#include <imsg.h>
27#include <paths.h>
28#include <stdlib.h>
29#include <string.h>
30#include <time.h>
31#include <unistd.h>

33#include "tmux.h"

35static void	server_client_free(int, short, void *);
36static void	server_client_check_pane_resize(struct window_pane *);
37static void	server_client_check_pane_buffer(struct window_pane *);
38static void	server_client_check_window_resize(struct window *);
39static key_code	server_client_check_mouse(struct client *, struct key_event *);
40static void	server_client_repeat_timer(int, short, void *);
41static void	server_client_click_timer(int, short, void *);
42static void	server_client_check_exit(struct client *);
43static void	server_client_check_redraw(struct client *);
44static void	server_client_check_modes(struct client *);
45static void	server_client_set_title(struct client *);
46static void	server_client_reset_state(struct client *);
47static int	server_client_assume_paste(struct session *);
48static void	server_client_update_latest(struct client *);

50static void	server_client_dispatch(struct imsg *, void *);
51static void	server_client_dispatch_command(struct client *, struct imsg *);
52static void	server_client_dispatch_identify(struct client *, struct imsg *);
53static void	server_client_dispatch_shell(struct client *);

55/* Compare client windows. */
56static int
57server_client_window_cmp(struct client_window *cw1,
  struct client_window *cw2)
59{
if (cw1->window < cw2->window)
return (-1);
if (cw1->window > cw2->window)
return (1);
return (0);
65}
66RB_GENERATE(client_windows, client_window, entry, server_client_window_cmp)void client_windows_RB_INSERT_COLOR(struct client_windows *head
, struct client_window *elm) { struct client_window *parent, *
gparent, *tmp; while ((parent = (elm)->entry.rbe_parent) &&
 (parent)->entry.rbe_color == 1) { gparent = (parent)->
entry.rbe_parent; if (parent == (gparent)->entry.rbe_left)
 { tmp = (gparent)->entry.rbe_right; if (tmp && (tmp
)->entry.rbe_color == 1) { (tmp)->entry.rbe_color = 0; do
 { (parent)->entry.rbe_color = 0; (gparent)->entry.rbe_color
 = 1; } while (0); elm = gparent; continue; } if ((parent)->
entry.rbe_right == elm) { do { (tmp) = (parent)->entry.rbe_right
; if (((parent)->entry.rbe_right = (tmp)->entry.rbe_left
)) { ((tmp)->entry.rbe_left)->entry.rbe_parent = (parent
); } do {} while (0); if (((tmp)->entry.rbe_parent = (parent
)->entry.rbe_parent)) { if ((parent) == ((parent)->entry
.rbe_parent)->entry.rbe_left) ((parent)->entry.rbe_parent
)->entry.rbe_left = (tmp); else ((parent)->entry.rbe_parent
)->entry.rbe_right = (tmp); } else (head)->rbh_root = (
tmp); (tmp)->entry.rbe_left = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = parent; parent = elm; elm
 = tmp; } do { (parent)->entry.rbe_color = 0; (gparent)->
entry.rbe_color = 1; } while (0); do { (tmp) = (gparent)->
entry.rbe_left; if (((gparent)->entry.rbe_left = (tmp)->
entry.rbe_right)) { ((tmp)->entry.rbe_right)->entry.rbe_parent
 = (gparent); } do {} while (0); if (((tmp)->entry.rbe_parent
 = (gparent)->entry.rbe_parent)) { if ((gparent) == ((gparent
)->entry.rbe_parent)->entry.rbe_left) ((gparent)->entry
.rbe_parent)->entry.rbe_left = (tmp); else ((gparent)->
entry.rbe_parent)->entry.rbe_right = (tmp); } else (head)->
rbh_root = (tmp); (tmp)->entry.rbe_right = (gparent); (gparent
)->entry.rbe_parent = (tmp); do {} while (0); if (((tmp)->
entry.rbe_parent)) do {} while (0); } while (0); } else { tmp
 = (gparent)->entry.rbe_left; if (tmp && (tmp)->
entry.rbe_color == 1) { (tmp)->entry.rbe_color = 0; do { (
parent)->entry.rbe_color = 0; (gparent)->entry.rbe_color
 = 1; } while (0); elm = gparent; continue; } if ((parent)->
entry.rbe_left == elm) { do { (tmp) = (parent)->entry.rbe_left
; if (((parent)->entry.rbe_left = (tmp)->entry.rbe_right
)) { ((tmp)->entry.rbe_right)->entry.rbe_parent = (parent
); } do {} while (0); if (((tmp)->entry.rbe_parent = (parent
)->entry.rbe_parent)) { if ((parent) == ((parent)->entry
.rbe_parent)->entry.rbe_left) ((parent)->entry.rbe_parent
)->entry.rbe_left = (tmp); else ((parent)->entry.rbe_parent
)->entry.rbe_right = (tmp); } else (head)->rbh_root = (
tmp); (tmp)->entry.rbe_right = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = parent; parent = elm; elm
 = tmp; } do { (parent)->entry.rbe_color = 0; (gparent)->
entry.rbe_color = 1; } while (0); do { (tmp) = (gparent)->
entry.rbe_right; if (((gparent)->entry.rbe_right = (tmp)->
entry.rbe_left)) { ((tmp)->entry.rbe_left)->entry.rbe_parent
 = (gparent); } do {} while (0); if (((tmp)->entry.rbe_parent
 = (gparent)->entry.rbe_parent)) { if ((gparent) == ((gparent
)->entry.rbe_parent)->entry.rbe_left) ((gparent)->entry
.rbe_parent)->entry.rbe_left = (tmp); else ((gparent)->
entry.rbe_parent)->entry.rbe_right = (tmp); } else (head)->
rbh_root = (tmp); (tmp)->entry.rbe_left = (gparent); (gparent
)->entry.rbe_parent = (tmp); do {} while (0); if (((tmp)->
entry.rbe_parent)) do {} while (0); } while (0); } } (head->
rbh_root)->entry.rbe_color = 0; } void client_windows_RB_REMOVE_COLOR
(struct client_windows *head, struct client_window *parent, struct
 client_window *elm) { struct client_window *tmp; while ((elm
 == ((void *)0) || (elm)->entry.rbe_color == 0) &&
 elm != (head)->rbh_root) { if ((parent)->entry.rbe_left
 == elm) { tmp = (parent)->entry.rbe_right; if ((tmp)->
entry.rbe_color == 1) { do { (tmp)->entry.rbe_color = 0; (
parent)->entry.rbe_color = 1; } while (0); do { (tmp) = (parent
)->entry.rbe_right; if (((parent)->entry.rbe_right = (tmp
)->entry.rbe_left)) { ((tmp)->entry.rbe_left)->entry
.rbe_parent = (parent); } do {} while (0); if (((tmp)->entry
.rbe_parent = (parent)->entry.rbe_parent)) { if ((parent) ==
 ((parent)->entry.rbe_parent)->entry.rbe_left) ((parent
)->entry.rbe_parent)->entry.rbe_left = (tmp); else ((parent
)->entry.rbe_parent)->entry.rbe_right = (tmp); } else (
head)->rbh_root = (tmp); (tmp)->entry.rbe_left = (parent
); (parent)->entry.rbe_parent = (tmp); do {} while (0); if
 (((tmp)->entry.rbe_parent)) do {} while (0); } while (0);
 tmp = (parent)->entry.rbe_right; } if (((tmp)->entry.rbe_left
 == ((void *)0) || ((tmp)->entry.rbe_left)->entry.rbe_color
 == 0) && ((tmp)->entry.rbe_right == ((void *)0) ||
 ((tmp)->entry.rbe_right)->entry.rbe_color == 0)) { (tmp
)->entry.rbe_color = 1; elm = parent; parent = (elm)->entry
.rbe_parent; } else { if ((tmp)->entry.rbe_right == ((void
 *)0) || ((tmp)->entry.rbe_right)->entry.rbe_color == 0
) { struct client_window *oleft; if ((oleft = (tmp)->entry
.rbe_left)) (oleft)->entry.rbe_color = 0; (tmp)->entry.
rbe_color = 1; do { (oleft) = (tmp)->entry.rbe_left; if ((
(tmp)->entry.rbe_left = (oleft)->entry.rbe_right)) { ((
oleft)->entry.rbe_right)->entry.rbe_parent = (tmp); } do
 {} while (0); if (((oleft)->entry.rbe_parent = (tmp)->
entry.rbe_parent)) { if ((tmp) == ((tmp)->entry.rbe_parent
)->entry.rbe_left) ((tmp)->entry.rbe_parent)->entry.
rbe_left = (oleft); else ((tmp)->entry.rbe_parent)->entry
.rbe_right = (oleft); } else (head)->rbh_root = (oleft); (
oleft)->entry.rbe_right = (tmp); (tmp)->entry.rbe_parent
 = (oleft); do {} while (0); if (((oleft)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = (parent)->entry.rbe_right
; } (tmp)->entry.rbe_color = (parent)->entry.rbe_color;
 (parent)->entry.rbe_color = 0; if ((tmp)->entry.rbe_right
) ((tmp)->entry.rbe_right)->entry.rbe_color = 0; do { (
tmp) = (parent)->entry.rbe_right; if (((parent)->entry.
rbe_right = (tmp)->entry.rbe_left)) { ((tmp)->entry.rbe_left
)->entry.rbe_parent = (parent); } do {} while (0); if (((tmp
)->entry.rbe_parent = (parent)->entry.rbe_parent)) { if
 ((parent) == ((parent)->entry.rbe_parent)->entry.rbe_left
) ((parent)->entry.rbe_parent)->entry.rbe_left = (tmp);
 else ((parent)->entry.rbe_parent)->entry.rbe_right = (
tmp); } else (head)->rbh_root = (tmp); (tmp)->entry.rbe_left
 = (parent); (parent)->entry.rbe_parent = (tmp); do {} while
 (0); if (((tmp)->entry.rbe_parent)) do {} while (0); } while
 (0); elm = (head)->rbh_root; break; } } else { tmp = (parent
)->entry.rbe_left; if ((tmp)->entry.rbe_color == 1) { do
 { (tmp)->entry.rbe_color = 0; (parent)->entry.rbe_color
 = 1; } while (0); do { (tmp) = (parent)->entry.rbe_left; if
 (((parent)->entry.rbe_left = (tmp)->entry.rbe_right)) {
 ((tmp)->entry.rbe_right)->entry.rbe_parent = (parent);
 } do {} while (0); if (((tmp)->entry.rbe_parent = (parent
)->entry.rbe_parent)) { if ((parent) == ((parent)->entry
.rbe_parent)->entry.rbe_left) ((parent)->entry.rbe_parent
)->entry.rbe_left = (tmp); else ((parent)->entry.rbe_parent
)->entry.rbe_right = (tmp); } else (head)->rbh_root = (
tmp); (tmp)->entry.rbe_right = (parent); (parent)->entry
.rbe_parent = (tmp); do {} while (0); if (((tmp)->entry.rbe_parent
)) do {} while (0); } while (0); tmp = (parent)->entry.rbe_left
; } if (((tmp)->entry.rbe_left == ((void *)0) || ((tmp)->
entry.rbe_left)->entry.rbe_color == 0) && ((tmp)->
entry.rbe_right == ((void *)0) || ((tmp)->entry.rbe_right)
->entry.rbe_color == 0)) { (tmp)->entry.rbe_color = 1; elm
 = parent; parent = (elm)->entry.rbe_parent; } else { if (
(tmp)->entry.rbe_left == ((void *)0) || ((tmp)->entry.rbe_left
)->entry.rbe_color == 0) { struct client_window *oright; if
 ((oright = (tmp)->entry.rbe_right)) (oright)->entry.rbe_color
 = 0; (tmp)->entry.rbe_color = 1; do { (oright) = (tmp)->
entry.rbe_right; if (((tmp)->entry.rbe_right = (oright)->
entry.rbe_left)) { ((oright)->entry.rbe_left)->entry.rbe_parent
 = (tmp); } do {} while (0); if (((oright)->entry.rbe_parent
 = (tmp)->entry.rbe_parent)) { if ((tmp) == ((tmp)->entry
.rbe_parent)->entry.rbe_left) ((tmp)->entry.rbe_parent)
->entry.rbe_left = (oright); else ((tmp)->entry.rbe_parent
)->entry.rbe_right = (oright); } else (head)->rbh_root =
 (oright); (oright)->entry.rbe_left = (tmp); (tmp)->entry
.rbe_parent = (oright); do {} while (0); if (((oright)->entry
.rbe_parent)) do {} while (0); } while (0); tmp = (parent)->
entry.rbe_left; } (tmp)->entry.rbe_color = (parent)->entry
.rbe_color; (parent)->entry.rbe_color = 0; if ((tmp)->entry
.rbe_left) ((tmp)->entry.rbe_left)->entry.rbe_color = 0
; do { (tmp) = (parent)->entry.rbe_left; if (((parent)->
entry.rbe_left = (tmp)->entry.rbe_right)) { ((tmp)->entry
.rbe_right)->entry.rbe_parent = (parent); } do {} while (0
); if (((tmp)->entry.rbe_parent = (parent)->entry.rbe_parent
)) { if ((parent) == ((parent)->entry.rbe_parent)->entry
.rbe_left) ((parent)->entry.rbe_parent)->entry.rbe_left
 = (tmp); else ((parent)->entry.rbe_parent)->entry.rbe_right
 = (tmp); } else (head)->rbh_root = (tmp); (tmp)->entry
.rbe_right = (parent); (parent)->entry.rbe_parent = (tmp);
 do {} while (0); if (((tmp)->entry.rbe_parent)) do {} while
 (0); } while (0); elm = (head)->rbh_root; break; } } } if
 (elm) (elm)->entry.rbe_color = 0; } struct client_window *
 client_windows_RB_REMOVE(struct client_windows *head, struct
 client_window *elm) { struct client_window *child, *parent, *
old = elm; int color; if ((elm)->entry.rbe_left == ((void *
)0)) child = (elm)->entry.rbe_right; else if ((elm)->entry
.rbe_right == ((void *)0)) child = (elm)->entry.rbe_left; else
 { struct client_window *left; elm = (elm)->entry.rbe_right
; while ((left = (elm)->entry.rbe_left)) elm = left; child
 = (elm)->entry.rbe_right; parent = (elm)->entry.rbe_parent
; color = (elm)->entry.rbe_color; if (child) (child)->entry
.rbe_parent = parent; if (parent) { if ((parent)->entry.rbe_left
 == elm) (parent)->entry.rbe_left = child; else (parent)->
entry.rbe_right = child; do {} while (0); } else (head)->rbh_root
 = child; if ((elm)->entry.rbe_parent == old) parent = elm
; (elm)->entry = (old)->entry; if ((old)->entry.rbe_parent
) { if (((old)->entry.rbe_parent)->entry.rbe_left == old
) ((old)->entry.rbe_parent)->entry.rbe_left = elm; else
 ((old)->entry.rbe_parent)->entry.rbe_right = elm; do {
} while (0); } else (head)->rbh_root = elm; ((old)->entry
.rbe_left)->entry.rbe_parent = elm; if ((old)->entry.rbe_right
) ((old)->entry.rbe_right)->entry.rbe_parent = elm; if (
parent) { left = parent; do { do {} while (0); } while ((left
 = (left)->entry.rbe_parent)); } goto color; } parent = (elm
)->entry.rbe_parent; color = (elm)->entry.rbe_color; if
 (child) (child)->entry.rbe_parent = parent; if (parent) {
 if ((parent)->entry.rbe_left == elm) (parent)->entry.rbe_left
 = child; else (parent)->entry.rbe_right = child; do {} while
 (0); } else (head)->rbh_root = child; color: if (color ==
 0) client_windows_RB_REMOVE_COLOR(head, parent, child); return
 (old); } struct client_window * client_windows_RB_INSERT(struct
 client_windows *head, struct client_window *elm) { struct client_window
 *tmp; struct client_window *parent = ((void *)0); int comp =
 0; tmp = (head)->rbh_root; while (tmp) { parent = tmp; comp
 = (server_client_window_cmp)(elm, parent); if (comp < 0) tmp
 = (tmp)->entry.rbe_left; else if (comp > 0) tmp = (tmp
)->entry.rbe_right; else return (tmp); } do { (elm)->entry
.rbe_parent = parent; (elm)->entry.rbe_left = (elm)->entry
.rbe_right = ((void *)0); (elm)->entry.rbe_color = 1; } while
 (0); if (parent != ((void *)0)) { if (comp < 0) (parent)->
entry.rbe_left = elm; else (parent)->entry.rbe_right = elm
; do {} while (0); } else (head)->rbh_root = elm; client_windows_RB_INSERT_COLOR
(head, elm); return (((void *)0)); } struct client_window * client_windows_RB_FIND
(struct client_windows *head, struct client_window *elm) { struct
 client_window *tmp = (head)->rbh_root; int comp; while (tmp
) { comp = server_client_window_cmp(elm, tmp); if (comp < 0
) tmp = (tmp)->entry.rbe_left; else if (comp > 0) tmp =
 (tmp)->entry.rbe_right; else return (tmp); } return (((void
 *)0)); } struct client_window * client_windows_RB_NFIND(struct
 client_windows *head, struct client_window *elm) { struct client_window
 *tmp = (head)->rbh_root; struct client_window *res = ((void
 *)0); int comp; while (tmp) { comp = server_client_window_cmp
(elm, tmp); if (comp < 0) { res = tmp; tmp = (tmp)->entry
.rbe_left; } else if (comp > 0) tmp = (tmp)->entry.rbe_right
; else return (tmp); } return (res); } struct client_window *
 client_windows_RB_NEXT(struct client_window *elm) { if ((elm
)->entry.rbe_right) { elm = (elm)->entry.rbe_right; while
 ((elm)->entry.rbe_left) elm = (elm)->entry.rbe_left; }
 else { if ((elm)->entry.rbe_parent && (elm == ((elm
)->entry.rbe_parent)->entry.rbe_left)) elm = (elm)->
entry.rbe_parent; else { while ((elm)->entry.rbe_parent &&
 (elm == ((elm)->entry.rbe_parent)->entry.rbe_right)) elm
 = (elm)->entry.rbe_parent; elm = (elm)->entry.rbe_parent
; } } return (elm); } struct client_window * client_windows_RB_PREV
(struct client_window *elm) { if ((elm)->entry.rbe_left) {
 elm = (elm)->entry.rbe_left; while ((elm)->entry.rbe_right
) elm = (elm)->entry.rbe_right; } else { if ((elm)->entry
.rbe_parent && (elm == ((elm)->entry.rbe_parent)->
entry.rbe_right)) elm = (elm)->entry.rbe_parent; else { while
 ((elm)->entry.rbe_parent && (elm == ((elm)->entry
.rbe_parent)->entry.rbe_left)) elm = (elm)->entry.rbe_parent
; elm = (elm)->entry.rbe_parent; } } return (elm); } struct
 client_window * client_windows_RB_MINMAX(struct client_windows
 *head, int val) { struct client_window *tmp = (head)->rbh_root
; struct client_window *parent = ((void *)0); while (tmp) { parent
 = tmp; if (val < 0) tmp = (tmp)->entry.rbe_left; else tmp
 = (tmp)->entry.rbe_right; } return (parent); };

68/* Number of attached clients. */
69u_int
70server_client_how_many(void)
71{
struct client  	*c;
u_int		 n;

n = 0;
TAILQ_FOREACH(c, &clients, entry)for((c) = ((&clients)->tqh_first); (c) != ((void *)0);
 (c) = ((c)->entry.tqe_next)) {
if (c->session != NULL((void *)0) && (~c->flags & CLIENT_UNATTACHEDFLAGS(0x200| 0x40| 0x4)))
	n++;
}
return (n);
81}

83/* Overlay timer callback. */
84static void
85server_client_overlay_timer(__unused__attribute__((__unused__)) int fd, __unused__attribute__((__unused__)) short events, void *data)
86{
server_client_clear_overlay(data);
88}

90/* Set an overlay on client. */
91void
92server_client_set_overlay(struct client *c, u_int delay,
  overlay_check_cb checkcb, overlay_mode_cb modecb,
  overlay_draw_cb drawcb, overlay_key_cb keycb, overlay_free_cb freecb,
  overlay_resize_cb resizecb, void *data)
96{
struct timeval	tv;

if (c->overlay_draw != NULL((void *)0))
server_client_clear_overlay(c);

tv.tv_sec = delay / 1000;
tv.tv_usec = (delay % 1000) * 1000L;

if (event_initialized(&c->overlay_timer)((&c->overlay_timer)->ev_flags & 0x80))
evtimer_del(&c->overlay_timer)event_del(&c->overlay_timer);
evtimer_set(&c->overlay_timer, server_client_overlay_timer, c)event_set(&c->overlay_timer, -1, 0, server_client_overlay_timer
, c);
if (delay != 0)
evtimer_add(&c->overlay_timer, &tv)event_add(&c->overlay_timer, &tv);

c->overlay_check = checkcb;
c->overlay_mode = modecb;
c->overlay_draw = drawcb;
c->overlay_key = keycb;
c->overlay_free = freecb;
c->overlay_resize = resizecb;
c->overlay_data = data;

if (c->overlay_check == NULL((void *)0))
c->tty.flags |= TTY_FREEZE0x2;
if (c->overlay_mode == NULL((void *)0))
c->tty.flags |= TTY_NOCURSOR0x1;
server_redraw_client(c);
124}

126/* Clear overlay mode on client. */
127void
128server_client_clear_overlay(struct client *c)
129{
if (c->overlay_draw == NULL((void *)0))
return;

if (event_initialized(&c->overlay_timer)((&c->overlay_timer)->ev_flags & 0x80))
evtimer_del(&c->overlay_timer)event_del(&c->overlay_timer);

if (c->overlay_free != NULL((void *)0))
c->overlay_free(c, c->overlay_data);

c->overlay_check = NULL((void *)0);
c->overlay_mode = NULL((void *)0);
c->overlay_draw = NULL((void *)0);
c->overlay_key = NULL((void *)0);
c->overlay_free = NULL((void *)0);
c->overlay_data = NULL((void *)0);

c->tty.flags &= ~(TTY_FREEZE0x2|TTY_NOCURSOR0x1);
server_redraw_client(c);
148}

150/*
* Given overlay position and dimensions, return parts of the input range which
* are visible.
*/
154void
155server_client_overlay_range(u_int x, u_int y, u_int sx, u_int sy, u_int px,
  u_int py, u_int nx, struct overlay_ranges *r)
157{
u_int	ox, onx;

/* Return up to 2 ranges. */
r->px[2] = 0;
r->nx[2] = 0;

/* Trivial case of no overlap in the y direction. */
if (py < y || py > y + sy - 1) {
r->px[0] = px;
r->nx[0] = nx;
r->px[1] = 0;
r->nx[1] = 0;
return;
}

/* Visible bit to the left of the popup. */
if (px < x) {
r->px[0] = px;
r->nx[0] = x - px;
if (r->nx[0] > nx)
	r->nx[0] = nx;
} else {
r->px[0] = 0;
r->nx[0] = 0;
}

/* Visible bit to the right of the popup. */
ox = x + sx;
if (px > ox)
ox = px;
onx = px + nx;
if (onx > ox) {
r->px[1] = ox;
r->nx[1] = onx - ox;
} else {
r->px[1] = 0;
r->nx[1] = 0;
}
196}

198/* Check if this client is inside this server. */
199int
200server_client_check_nested(struct client *c)
201{
struct environ_entry	*envent;
struct window_pane	*wp;

envent = environ_find(c->environ, "TMUX");
if (envent == NULL((void *)0) || *envent->value == '\0')
return (0);

RB_FOREACH(wp, window_pane_tree, &all_window_panes)for ((wp) = window_pane_tree_RB_MINMAX(&all_window_panes,
 -1); (wp) != ((void *)0); (wp) = window_pane_tree_RB_NEXT(wp
)) {
if (strcmp(wp->tty, c->ttyname) == 0)
	return (1);
}
return (0);
214}

216/* Set client key table. */
217void
218server_client_set_key_table(struct client *c, const char *name)
219{
if (name == NULL((void *)0))
name = server_client_get_key_table(c);

key_bindings_unref_table(c->keytable);
c->keytable = key_bindings_get_table(name, 1);
c->keytable->references++;
226}

228/* Get default key table. */
229const char *
230server_client_get_key_table(struct client *c)
231{
struct session	*s = c->session;
const char	*name;

if (s == NULL((void *)0))
return ("root");

name = options_get_string(s->options, "key-table");
if (*name == '\0')
return ("root");
return (name);
242}

244/* Is this table the default key table? */
245static int
246server_client_is_default_key_table(struct client *c, struct key_table *table)
247{
return (strcmp(table->name, server_client_get_key_table(c)) == 0);
249}

251/* Create a new client. */
252struct client *
253server_client_create(int fd)
254{
struct client	*c;

setblocking(fd, 0);

c = xcalloc(1, sizeof *c);
c->references = 1;
c->peer = proc_add_peer(server_proc, fd, server_client_dispatch, c);

if (gettimeofday(&c->creation_time, NULL((void *)0)) != 0)
fatal("gettimeofday failed");
memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);

c->environ = environ_create();

c->fd = -1;
c->out_fd = -1;

c->queue = cmdq_new();
RB_INIT(&c->windows)do { (&c->windows)->rbh_root = ((void *)0); } while
 (0);
RB_INIT(&c->files)do { (&c->files)->rbh_root = ((void *)0); } while (
0);

c->tty.sx = 80;
c->tty.sy = 24;

status_init(c);
c->flags |= CLIENT_FOCUSED0x8000;

c->keytable = key_bindings_get_table("root", 1);
c->keytable->references++;

evtimer_set(&c->repeat_timer, server_client_repeat_timer, c)event_set(&c->repeat_timer, -1, 0, server_client_repeat_timer
, c);
evtimer_set(&c->click_timer, server_client_click_timer, c)event_set(&c->click_timer, -1, 0, server_client_click_timer
, c);

TAILQ_INSERT_TAIL(&clients, c, entry)do { (c)->entry.tqe_next = ((void *)0); (c)->entry.tqe_prev
 = (&clients)->tqh_last; *(&clients)->tqh_last =
 (c); (&clients)->tqh_last = &(c)->entry.tqe_next
; } while (0);
log_debug("new client %p", c);
return (c);
291}

293/* Open client terminal if needed. */
294int
295server_client_open(struct client *c, char **cause)
296{
const char	*ttynam = _PATH_TTY"/dev/tty";

if (c->flags & CLIENT_CONTROL0x2000)
return (0);

if (strcmp(c->ttyname, ttynam) == 0||
   ((isatty(STDIN_FILENO0) &&
   (ttynam = ttyname(STDIN_FILENO0)) != NULL((void *)0) &&
   strcmp(c->ttyname, ttynam) == 0) ||
   (isatty(STDOUT_FILENO1) &&
   (ttynam = ttyname(STDOUT_FILENO1)) != NULL((void *)0) &&
   strcmp(c->ttyname, ttynam) == 0) ||
   (isatty(STDERR_FILENO2) &&
   (ttynam = ttyname(STDERR_FILENO2)) != NULL((void *)0) &&
   strcmp(c->ttyname, ttynam) == 0))) {
xasprintf(cause, "can't use %s", c->ttyname);
return (-1);
}

if (!(c->flags & CLIENT_TERMINAL0x1)) {
*cause = xstrdup("not a terminal");
return (-1);
}

if (tty_open(&c->tty, cause) != 0)
return (-1);

return (0);
325}

327/* Lost an attached client. */
328static void
329server_client_attached_lost(struct client *c)
330{
struct session	*s;
struct window	*w;
struct client	*loop;
struct client	*found;

log_debug("lost attached client %p", c);

/*
* By this point the session in the client has been cleared so walk all
* windows to find any with this client as the latest.
*/
RB_FOREACH(w, windows, &windows)for ((w) = windows_RB_MINMAX(&windows, -1); (w) != ((void
 *)0); (w) = windows_RB_NEXT(w)) {
if (w->latest != c)
	continue;

found = NULL((void *)0);
TAILQ_FOREACH(loop, &clients, entry)for((loop) = ((&clients)->tqh_first); (loop) != ((void
 *)0); (loop) = ((loop)->entry.tqe_next)) {
	s = loop->session;
	if (loop == c || s == NULL((void *)0) || s->curw->window != w)
		continue;
	if (found == NULL((void *)0) || timercmp(&loop->activity_time,(((&loop->activity_time)->tv_sec == (&found->
activity_time)->tv_sec) ? ((&loop->activity_time)->
tv_usec > (&found->activity_time)->tv_usec) : ((
&loop->activity_time)->tv_sec > (&found->
activity_time)->tv_sec))
	    &found->activity_time, >)(((&loop->activity_time)->tv_sec == (&found->
activity_time)->tv_sec) ? ((&loop->activity_time)->
tv_usec > (&found->activity_time)->tv_usec) : ((
&loop->activity_time)->tv_sec > (&found->
activity_time)->tv_sec)))
		found = loop;
}
if (found != NULL((void *)0))
	server_client_update_latest(found);
}
358}

360/* Set client session. */
361void
362server_client_set_session(struct client *c, struct session *s)
363{
struct session	*old = c->session;

if (s != NULL((void *)0) && c->session != NULL((void *)0) && c->session != s)
c->last_session = c->session;
else if (s == NULL((void *)0))
c->last_session = NULL((void *)0);
c->session = s;
c->flags |= CLIENT_FOCUSED0x8000;

if (old != NULL((void *)0) && old->curw != NULL((void *)0))
window_update_focus(old->curw->window);
if (s != NULL((void *)0)) {
recalculate_sizes();
window_update_focus(s->curw->window);
session_update_activity(s, NULL((void *)0));
gettimeofday(&s->last_attached_time, NULL((void *)0));
s->curw->flags &= ~WINLINK_ALERTFLAGS(0x1|0x2|0x4);
s->curw->window->latest = c;
alerts_check_session(s);
tty_update_client_offset(c);
status_timer_start(c);
notify_client("client-session-changed", c);
server_redraw_client(c);
}

server_check_unattached();
server_update_socket();
391}

393/* Lost a client. */
394void
395server_client_lost(struct client *c)
396{
struct client_file	*cf, *cf1;
struct client_window	*cw, *cw1;

c->flags |= CLIENT_DEAD0x200;

server_client_clear_overlay(c);
status_prompt_clear(c);
status_message_clear(c);

RB_FOREACH_SAFE(cf, client_files, &c->files, cf1)for ((cf) = client_files_RB_MINMAX(&c->files, -1); ((cf
) != ((void *)0)) && ((cf1) = client_files_RB_NEXT(cf
), 1); (cf) = (cf1)) {
cf->error = EINTR4;
file_fire_done(cf);
}
RB_FOREACH_SAFE(cw, client_windows, &c->windows, cw1)for ((cw) = client_windows_RB_MINMAX(&c->windows, -1);
 ((cw) != ((void *)0)) && ((cw1) = client_windows_RB_NEXT
(cw), 1); (cw) = (cw1)) {
RB_REMOVE(client_windows, &c->windows, cw)client_windows_RB_REMOVE(&c->windows, cw);
free(cw);
}

TAILQ_REMOVE(&clients, c, entry)do { if (((c)->entry.tqe_next) != ((void *)0)) (c)->entry
.tqe_next->entry.tqe_prev = (c)->entry.tqe_prev; else (
&clients)->tqh_last = (c)->entry.tqe_prev; *(c)->
entry.tqe_prev = (c)->entry.tqe_next; ; ; } while (0);
log_debug("lost client %p", c);

if (c->flags & CLIENT_ATTACHED0x80) {
server_client_attached_lost(c);
notify_client("client-detached", c);
}

if (c->flags & CLIENT_CONTROL0x2000)
control_stop(c);
if (c->flags & CLIENT_TERMINAL0x1)
tty_free(&c->tty);
free(c->ttyname);

free(c->term_name);
free(c->term_type);
tty_term_free_list(c->term_caps, c->term_ncaps);

status_free(c);

free(c->title);
free((void *)c->cwd);

evtimer_del(&c->repeat_timer)event_del(&c->repeat_timer);
evtimer_del(&c->click_timer)event_del(&c->click_timer);

key_bindings_unref_table(c->keytable);

free(c->message_string);
if (event_initialized(&c->message_timer)((&c->message_timer)->ev_flags & 0x80))
evtimer_del(&c->message_timer)event_del(&c->message_timer);

free(c->prompt_saved);
free(c->prompt_string);
free(c->prompt_buffer);

format_lost_client(c);
environ_free(c->environ);

proc_remove_peer(c->peer);
c->peer = NULL((void *)0);

if (c->out_fd != -1)
close(c->out_fd);
if (c->fd != -1) {
close(c->fd);
c->fd = -1;
}
server_client_unref(c);

server_add_accept(0); /* may be more file descriptors now */

recalculate_sizes();
server_check_unattached();
server_update_socket();
470}

472/* Remove reference from a client. */
473void
474server_client_unref(struct client *c)
475{
log_debug("unref client %p (%d references)", c, c->references);

c->references--;
if (c->references == 0)
event_once(-1, EV_TIMEOUT0x01, server_client_free, c, NULL((void *)0));
481}

483/* Free dead client. */
484static void
485server_client_free(__unused__attribute__((__unused__)) int fd, __unused__attribute__((__unused__)) short events, void *arg)
486{
struct client	*c = arg;

log_debug("free client %p (%d references)", c, c->references);

cmdq_free(c->queue);

if (c->references == 0) {
free((void *)c->name);
free(c);
}
497}

499/* Suspend a client. */
500void
501server_client_suspend(struct client *c)
502{
struct session	*s = c->session;

if (s == NULL((void *)0) || (c->flags & CLIENT_UNATTACHEDFLAGS(0x200| 0x40| 0x4)))
return;

tty_stop_tty(&c->tty);
c->flags |= CLIENT_SUSPENDED0x40;
proc_send(c->peer, MSG_SUSPEND, -1, NULL((void *)0), 0);
511}

513/* Detach a client. */
514void
515server_client_detach(struct client *c, enum msgtype msgtype)
516{
struct session	*s = c->session;

if (s == NULL((void *)0) || (c->flags & CLIENT_NODETACHFLAGS(0x200| 0x4)))
return;

c->flags |= CLIENT_EXIT0x4;

c->exit_type = CLIENT_EXIT_DETACH;
c->exit_msgtype = msgtype;
c->exit_session = xstrdup(s->name);
527}

529/* Execute command to replace a client. */
530void
531server_client_exec(struct client *c, const char *cmd)
532{
struct session	*s = c->session;
char		*msg;
const char	*shell;
size_t		 cmdsize, shellsize;

if (*cmd == '\0')
return;
cmdsize = strlen(cmd) + 1;

if (s != NULL((void *)0))
shell = options_get_string(s->options, "default-shell");
else
shell = options_get_string(global_s_options, "default-shell");
if (!checkshell(shell))
shell = _PATH_BSHELL"/bin/sh";
shellsize = strlen(shell) + 1;

msg = xmalloc(cmdsize + shellsize);
memcpy(msg, cmd, cmdsize);
memcpy(msg + cmdsize, shell, shellsize);

proc_send(c->peer, MSG_EXEC, -1, msg, cmdsize + shellsize);
free(msg);
556}

558/* Check for mouse keys. */
559static key_code
560server_client_check_mouse(struct client *c, struct key_event *event)
561{
struct mouse_event	*m = &event->m;
struct session		*s = c->session;
struct winlink		*wl;
struct window_pane	*wp;
u_int			 x, y, b, sx, sy, px, py;
int			 ignore = 0;
key_code		 key;
struct timeval		 tv;
struct style_range	*sr;
enum { NOTYPE,
      MOVE,
      DOWN,
      UP,
      DRAG,
      WHEEL,
      SECOND,
      DOUBLE,
      TRIPLE } type = NOTYPE;
enum { NOWHERE,
      PANE,
      STATUS,
      STATUS_LEFT,
      STATUS_RIGHT,
      STATUS_DEFAULT,
      BORDER } where = NOWHERE;

log_debug("%s mouse %02x at %u,%u (last %u,%u) (%d)", c->name, m->b,
   m->x, m->y, m->lx, m->ly, c->tty.mouse_drag_flag);

/* What type of event is this? */
if (event->key == KEYC_DOUBLECLICK) {
type = DOUBLE;
x = m->x, y = m->y, b = m->b;
ignore = 1;
log_debug("double-click at %u,%u", x, y);
} else if ((m->sgr_type != ' ' &&
   MOUSE_DRAG(m->sgr_b)((m->sgr_b) & 32) &&
   MOUSE_BUTTONS(m->sgr_b)((m->sgr_b) & 3) == 3) ||
   (m->sgr_type == ' ' &&
   MOUSE_DRAG(m->b)((m->b) & 32) &&
   MOUSE_BUTTONS(m->b)((m->b) & 3) == 3 &&
   MOUSE_BUTTONS(m->lb)((m->lb) & 3) == 3)) {
type = MOVE;
x = m->x, y = m->y, b = 0;
log_debug("move at %u,%u", x, y);
} else if (MOUSE_DRAG(m->b)((m->b) & 32)) {
type = DRAG;
if (c->tty.mouse_drag_flag) {
	x = m->x, y = m->y, b = m->b;
	if (x == m->lx && y == m->ly)
		return (KEYC_UNKNOWN0x000fe000000000ULL);
	log_debug("drag update at %u,%u", x, y);
} else {
	x = m->lx, y = m->ly, b = m->lb;
	log_debug("drag start at %u,%u", x, y);
}
} else if (MOUSE_WHEEL(m->b)((m->b) & 64)) {
type = WHEEL;
x = m->x, y = m->y, b = m->b;
log_debug("wheel at %u,%u", x, y);
} else if (MOUSE_RELEASE(m->b)(((m->b) & 3) == 3)) {
type = UP;
x = m->x, y = m->y, b = m->lb;
log_debug("up at %u,%u", x, y);
} else {
if (c->flags & CLIENT_DOUBLECLICK0x100000) {
	evtimer_del(&c->click_timer)event_del(&c->click_timer);
	c->flags &= ~CLIENT_DOUBLECLICK0x100000;
	if (m->b == c->click_button) {
		type = SECOND;
		x = m->x, y = m->y, b = m->b;
		log_debug("second-click at %u,%u", x, y);
		c->flags |= CLIENT_TRIPLECLICK0x200000;
	}
} else if (c->flags & CLIENT_TRIPLECLICK0x200000) {
	evtimer_del(&c->click_timer)event_del(&c->click_timer);
	c->flags &= ~CLIENT_TRIPLECLICK0x200000;
	if (m->b == c->click_button) {
		type = TRIPLE;
		x = m->x, y = m->y, b = m->b;
		log_debug("triple-click at %u,%u", x, y);
		goto have_event;
	}
} else {
	type = DOWN;
	x = m->x, y = m->y, b = m->b;
	log_debug("down at %u,%u", x, y);
	c->flags |= CLIENT_DOUBLECLICK0x100000;
}

if (KEYC_CLICK_TIMEOUT300 != 0) {
	memcpy(&c->click_event, m, sizeof c->click_event);
	c->click_button = m->b;

	log_debug("click timer started");
	tv.tv_sec = KEYC_CLICK_TIMEOUT300 / 1000;
	tv.tv_usec = (KEYC_CLICK_TIMEOUT300 % 1000) * 1000L;
	evtimer_del(&c->click_timer)event_del(&c->click_timer);
	evtimer_add(&c->click_timer, &tv)event_add(&c->click_timer, &tv);
}
}

664have_event:
if (type == NOTYPE)
return (KEYC_UNKNOWN0x000fe000000000ULL);

/* Save the session. */
m->s = s->id;
m->w = -1;
m->ignore = ignore;

/* Is this on the status line? */
m->statusat = status_at_line(c);
m->statuslines = status_line_size(c);
if (m->statusat != -1 &&
   y >= (u_int)m->statusat &&
   y < m->statusat + m->statuslines) {
sr = status_get_range(c, x, y - m->statusat);
if (sr == NULL((void *)0)) {
	where = STATUS_DEFAULT;
} else {
	switch (sr->type) {
	case STYLE_RANGE_NONE:
		return (KEYC_UNKNOWN0x000fe000000000ULL);
	case STYLE_RANGE_LEFT:
		where = STATUS_LEFT;
		break;
	case STYLE_RANGE_RIGHT:
		where = STATUS_RIGHT;
		break;
	case STYLE_RANGE_WINDOW:
		wl = winlink_find_by_index(&s->windows,
		    sr->argument);
		if (wl == NULL((void *)0))
			return (KEYC_UNKNOWN0x000fe000000000ULL);
		m->w = wl->window->id;

		where = STATUS;
		break;
	}
}
}

/* Not on status line. Adjust position and check for border or pane. */
if (where == NOWHERE) {
px = x;
if (m->statusat == 0 && y >= m->statuslines)
	py = y - m->statuslines;
else if (m->statusat > 0 && y >= (u_int)m->statusat)
	py = m->statusat - 1;
else
	py = y;

tty_window_offset(&c->tty, &m->ox, &m->oy, &sx, &sy);
log_debug("mouse window @%u at %u,%u (%ux%u)",
    s->curw->window->id, m->ox, m->oy, sx, sy);
if (px > sx || py > sy)
	return (KEYC_UNKNOWN0x000fe000000000ULL);
px = px + m->ox;
py = py + m->oy;

/* Try the pane borders if not zoomed. */
if (~s->curw->window->flags & WINDOW_ZOOMED0x8) {
	TAILQ_FOREACH(wp, &s->curw->window->panes, entry)for((wp) = ((&s->curw->window->panes)->tqh_first
); (wp) != ((void *)0); (wp) = ((wp)->entry.tqe_next)) {
		if ((wp->xoff + wp->sx == px &&
		    wp->yoff <= 1 + py &&
		    wp->yoff + wp->sy >= py) ||
		    (wp->yoff + wp->sy == py &&
		    wp->xoff <= 1 + px &&
		    wp->xoff + wp->sx >= px))
			break;
	}
	if (wp != NULL((void *)0))
		where = BORDER;
}

/* Otherwise try inside the pane. */
if (where == NOWHERE) {
	wp = window_get_active_at(s->curw->window, px, py);
	if (wp != NULL((void *)0))
		where = PANE;
	else
		return (KEYC_UNKNOWN0x000fe000000000ULL);
}
if (where == PANE)
	log_debug("mouse %u,%u on pane %%%u", x, y, wp->id);
else if (where == BORDER)
	log_debug("mouse on pane %%%u border", wp->id);
m->wp = wp->id;
m->w = wp->window->id;
} else
m->wp = -1;

/* Stop dragging if needed. */
if (type != DRAG && type != WHEEL && c->tty.mouse_drag_flag) {
if (c->tty.mouse_drag_release != NULL((void *)0))
	c->tty.mouse_drag_release(c, m);

c->tty.mouse_drag_update = NULL((void *)0);
c->tty.mouse_drag_release = NULL((void *)0);

/*
 * End a mouse drag by passing a MouseDragEnd key corresponding
 * to the button that started the drag.
 */
switch (c->tty.mouse_drag_flag) {
case 1:
	if (where == PANE)
		key = KEYC_MOUSEDRAGEND1_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEDRAGEND1_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEDRAGEND1_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEDRAGEND1_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEDRAGEND1_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEDRAGEND1_BORDER;
	break;
case 2:
	if (where == PANE)
		key = KEYC_MOUSEDRAGEND2_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEDRAGEND2_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEDRAGEND2_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEDRAGEND2_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEDRAGEND2_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEDRAGEND2_BORDER;
	break;
case 3:
	if (where == PANE)
		key = KEYC_MOUSEDRAGEND3_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEDRAGEND3_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEDRAGEND3_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEDRAGEND3_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEDRAGEND3_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEDRAGEND3_BORDER;
	break;
default:
	key = KEYC_MOUSE;
	break;
}
c->tty.mouse_drag_flag = 0;
goto out;
}

/* Convert to a key binding. */
key = KEYC_UNKNOWN0x000fe000000000ULL;
switch (type) {
case NOTYPE:
break;
case MOVE:
if (where == PANE)
	key = KEYC_MOUSEMOVE_PANE;
if (where == STATUS)
	key = KEYC_MOUSEMOVE_STATUS;
if (where == STATUS_LEFT)
	key = KEYC_MOUSEMOVE_STATUS_LEFT;
if (where == STATUS_RIGHT)
	key = KEYC_MOUSEMOVE_STATUS_RIGHT;
if (where == STATUS_DEFAULT)
	key = KEYC_MOUSEMOVE_STATUS_DEFAULT;
if (where == BORDER)
	key = KEYC_MOUSEMOVE_BORDER;
break;
case DRAG:
if (c->tty.mouse_drag_update != NULL((void *)0))
	key = KEYC_DRAGGING;
else {
	switch (MOUSE_BUTTONS(b)((b) & 3)) {
	case 0:
		if (where == PANE)
			key = KEYC_MOUSEDRAG1_PANE;
		if (where == STATUS)
			key = KEYC_MOUSEDRAG1_STATUS;
		if (where == STATUS_LEFT)
			key = KEYC_MOUSEDRAG1_STATUS_LEFT;
		if (where == STATUS_RIGHT)
			key = KEYC_MOUSEDRAG1_STATUS_RIGHT;
		if (where == STATUS_DEFAULT)
			key = KEYC_MOUSEDRAG1_STATUS_DEFAULT;
		if (where == BORDER)
			key = KEYC_MOUSEDRAG1_BORDER;
		break;
	case 1:
		if (where == PANE)
			key = KEYC_MOUSEDRAG2_PANE;
		if (where == STATUS)
			key = KEYC_MOUSEDRAG2_STATUS;
		if (where == STATUS_LEFT)
			key = KEYC_MOUSEDRAG2_STATUS_LEFT;
		if (where == STATUS_RIGHT)
			key = KEYC_MOUSEDRAG2_STATUS_RIGHT;
		if (where == STATUS_DEFAULT)
			key = KEYC_MOUSEDRAG2_STATUS_DEFAULT;
		if (where == BORDER)
			key = KEYC_MOUSEDRAG2_BORDER;
		break;
	case 2:
		if (where == PANE)
			key = KEYC_MOUSEDRAG3_PANE;
		if (where == STATUS)
			key = KEYC_MOUSEDRAG3_STATUS;
		if (where == STATUS_LEFT)
			key = KEYC_MOUSEDRAG3_STATUS_LEFT;
		if (where == STATUS_RIGHT)
			key = KEYC_MOUSEDRAG3_STATUS_RIGHT;
		if (where == STATUS_DEFAULT)
			key = KEYC_MOUSEDRAG3_STATUS_DEFAULT;
		if (where == BORDER)
			key = KEYC_MOUSEDRAG3_BORDER;
		break;
	}
}

/*
 * Begin a drag by setting the flag to a non-zero value that
 * corresponds to the mouse button in use.
 */
c->tty.mouse_drag_flag = MOUSE_BUTTONS(b)((b) & 3) + 1;
break;
case WHEEL:
if (MOUSE_BUTTONS(b)((b) & 3) == MOUSE_WHEEL_UP0) {
	if (where == PANE)
		key = KEYC_WHEELUP_PANE;
	if (where == STATUS)
		key = KEYC_WHEELUP_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_WHEELUP_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_WHEELUP_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_WHEELUP_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_WHEELUP_BORDER;
} else {
	if (where == PANE)
		key = KEYC_WHEELDOWN_PANE;
	if (where == STATUS)
		key = KEYC_WHEELDOWN_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_WHEELDOWN_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_WHEELDOWN_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_WHEELDOWN_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_WHEELDOWN_BORDER;
}
break;
case UP:
switch (MOUSE_BUTTONS(b)((b) & 3)) {
case 0:
	if (where == PANE)
		key = KEYC_MOUSEUP1_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEUP1_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEUP1_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEUP1_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEUP1_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEUP1_BORDER;
	break;
case 1:
	if (where == PANE)
		key = KEYC_MOUSEUP2_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEUP2_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEUP2_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEUP2_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEUP2_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEUP2_BORDER;
	break;
case 2:
	if (where == PANE)
		key = KEYC_MOUSEUP3_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEUP3_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEUP3_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEUP3_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEUP3_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEUP3_BORDER;
	break;
}
break;
case DOWN:
switch (MOUSE_BUTTONS(b)((b) & 3)) {
case 0:
	if (where == PANE)
		key = KEYC_MOUSEDOWN1_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEDOWN1_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEDOWN1_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEDOWN1_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEDOWN1_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEDOWN1_BORDER;
	break;
case 1:
	if (where == PANE)
		key = KEYC_MOUSEDOWN2_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEDOWN2_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEDOWN2_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEDOWN2_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEDOWN2_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEDOWN2_BORDER;
	break;
case 2:
	if (where == PANE)
		key = KEYC_MOUSEDOWN3_PANE;
	if (where == STATUS)
		key = KEYC_MOUSEDOWN3_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_MOUSEDOWN3_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_MOUSEDOWN3_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_MOUSEDOWN3_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_MOUSEDOWN3_BORDER;
	break;
}
break;
case SECOND:
switch (MOUSE_BUTTONS(b)((b) & 3)) {
case 0:
	if (where == PANE)
		key = KEYC_SECONDCLICK1_PANE;
	if (where == STATUS)
		key = KEYC_SECONDCLICK1_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_SECONDCLICK1_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_SECONDCLICK1_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_SECONDCLICK1_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_SECONDCLICK1_BORDER;
	break;
case 1:
	if (where == PANE)
		key = KEYC_SECONDCLICK2_PANE;
	if (where == STATUS)
		key = KEYC_SECONDCLICK2_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_SECONDCLICK2_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_SECONDCLICK2_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_SECONDCLICK2_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_SECONDCLICK2_BORDER;
	break;
case 2:
	if (where == PANE)
		key = KEYC_SECONDCLICK3_PANE;
	if (where == STATUS)
		key = KEYC_SECONDCLICK3_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_SECONDCLICK3_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_SECONDCLICK3_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_SECONDCLICK3_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_SECONDCLICK3_BORDER;
	break;
}
break;
case DOUBLE:
switch (MOUSE_BUTTONS(b)((b) & 3)) {
case 0:
	if (where == PANE)
		key = KEYC_DOUBLECLICK1_PANE;
	if (where == STATUS)
		key = KEYC_DOUBLECLICK1_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_DOUBLECLICK1_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_DOUBLECLICK1_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_DOUBLECLICK1_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_DOUBLECLICK1_BORDER;
	break;
case 1:
	if (where == PANE)
		key = KEYC_DOUBLECLICK2_PANE;
	if (where == STATUS)
		key = KEYC_DOUBLECLICK2_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_DOUBLECLICK2_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_DOUBLECLICK2_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_DOUBLECLICK2_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_DOUBLECLICK2_BORDER;
	break;
case 2:
	if (where == PANE)
		key = KEYC_DOUBLECLICK3_PANE;
	if (where == STATUS)
		key = KEYC_DOUBLECLICK3_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_DOUBLECLICK3_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_DOUBLECLICK3_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_DOUBLECLICK3_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_DOUBLECLICK3_BORDER;
	break;
}
break;
case TRIPLE:
switch (MOUSE_BUTTONS(b)((b) & 3)) {
case 0:
	if (where == PANE)
		key = KEYC_TRIPLECLICK1_PANE;
	if (where == STATUS)
		key = KEYC_TRIPLECLICK1_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_TRIPLECLICK1_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_TRIPLECLICK1_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_TRIPLECLICK1_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_TRIPLECLICK1_BORDER;
	break;
case 1:
	if (where == PANE)
		key = KEYC_TRIPLECLICK2_PANE;
	if (where == STATUS)
		key = KEYC_TRIPLECLICK2_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_TRIPLECLICK2_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_TRIPLECLICK2_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_TRIPLECLICK2_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_TRIPLECLICK2_BORDER;
	break;
case 2:
	if (where == PANE)
		key = KEYC_TRIPLECLICK3_PANE;
	if (where == STATUS)
		key = KEYC_TRIPLECLICK3_STATUS;
	if (where == STATUS_LEFT)
		key = KEYC_TRIPLECLICK3_STATUS_LEFT;
	if (where == STATUS_RIGHT)
		key = KEYC_TRIPLECLICK3_STATUS_RIGHT;
	if (where == STATUS_DEFAULT)
		key = KEYC_TRIPLECLICK3_STATUS_DEFAULT;
	if (where == BORDER)
		key = KEYC_TRIPLECLICK3_BORDER;
	break;
}
break;
}
if (key == KEYC_UNKNOWN0x000fe000000000ULL)
return (KEYC_UNKNOWN0x000fe000000000ULL);

1156out:
/* Apply modifiers if any. */
if (b & MOUSE_MASK_META8)
key |= KEYC_META0x00100000000000ULL;
if (b & MOUSE_MASK_CTRL16)
key |= KEYC_CTRL0x00200000000000ULL;
if (b & MOUSE_MASK_SHIFT4)
key |= KEYC_SHIFT0x00400000000000ULL;

if (log_get_level() != 0)
log_debug("mouse key is %s", key_string_lookup_key (key, 1));
return (key);
1168}

1170/* Is this fast enough to probably be a paste? */
1171static int
1172server_client_assume_paste(struct session *s)
1173{
struct timeval	tv;
int		t;

if ((t = options_get_number(s->options, "assume-paste-time")) == 0)
return (0);

timersub(&s->activity_time, &s->last_activity_time, &tv)do { (&tv)->tv_sec = (&s->activity_time)->tv_sec
 - (&s->last_activity_time)->tv_sec; (&tv)->
tv_usec = (&s->activity_time)->tv_usec - (&s->
last_activity_time)->tv_usec; if ((&tv)->tv_usec <
 0) { (&tv)->tv_sec--; (&tv)->tv_usec += 1000000
; } } while (0);
if (tv.tv_sec == 0 && tv.tv_usec < t * 1000) {
log_debug("session %s pasting (flag %d)", s->name,
    !!(s->flags & SESSION_PASTING0x1));
if (s->flags & SESSION_PASTING0x1)
	return (1);
s->flags |= SESSION_PASTING0x1;
return (0);
}
log_debug("session %s not pasting", s->name);
s->flags &= ~SESSION_PASTING0x1;
return (0);
1192}

1194/* Has the latest client changed? */
1195static void
1196server_client_update_latest(struct client *c)
1197{
struct window	*w;

if (c->session == NULL((void *)0))
return;
w = c->session->curw->window;

if (w->latest == c)
return;
w->latest = c;

if (options_get_number(w->options, "window-size") == WINDOW_SIZE_LATEST3)
recalculate_size(w, 0);

notify_client("client-active", c);
1212}

1214/*
* Handle data key input from client. This owns and can modify the key event it
* is given and is responsible for freeing it.
*/
1218static enum cmd_retval
1219server_client_key_callback(struct cmdq_item *item, void *data)
1220{
struct client			*c = cmdq_get_client(item);
struct key_event		*event = data;
key_code			 key = event->key;
struct mouse_event		*m = &event->m;
struct session			*s = c->session;
struct winlink			*wl;
struct window_pane		*wp;
struct window_mode_entry	*wme;
struct timeval			 tv;
struct key_table		*table, *first;
struct key_binding		*bd;
int				 xtimeout, flags;
struct cmd_find_state		 fs;
key_code			 key0;

/* Check the client is good to accept input. */
if (s == NULL((void *)0) || (c->flags & CLIENT_UNATTACHEDFLAGS(0x200| 0x40| 0x4)))
goto out;
wl = s->curw;

/* Update the activity timer. */
if (gettimeofday(&c->activity_time, NULL((void *)0)) != 0)
fatal("gettimeofday failed");
session_update_activity(s, &c->activity_time);

/* Check for mouse keys. */
m->valid = 0;
if (key == KEYC_MOUSE || key == KEYC_DOUBLECLICK) {
if (c->flags & CLIENT_READONLY0x800)
	goto out;
key = server_client_check_mouse(c, event);
if (key == KEYC_UNKNOWN0x000fe000000000ULL)
	goto out;

m->valid = 1;
m->key = key;

/*
 * Mouse drag is in progress, so fire the callback (now that
 * the mouse event is valid).
 */
if ((key & KEYC_MASK_KEY0x000fffffffffffULL) == KEYC_DRAGGING) {
	c->tty.mouse_drag_update(c, m);
	goto out;
}
event->key = key;
}

/* Find affected pane. */
if (!KEYC_IS_MOUSE(key)(((key) & 0x000fffffffffffULL) >= KEYC_MOUSE &&
 ((key) & 0x000fffffffffffULL) < KEYC_BSPACE) || cmd_find_from_mouse(&fs, m, 0) != 0)
cmd_find_from_client(&fs, c, 0);
wp = fs.wp;

/* Forward mouse keys if disabled. */
if (KEYC_IS_MOUSE(key)(((key) & 0x000fffffffffffULL) >= KEYC_MOUSE &&
 ((key) & 0x000fffffffffffULL) < KEYC_BSPACE) && !options_get_number(s->options, "mouse"))
goto forward_key;

/* Treat everything as a regular key when pasting is detected. */
if (!KEYC_IS_MOUSE(key)(((key) & 0x000fffffffffffULL) >= KEYC_MOUSE &&
 ((key) & 0x000fffffffffffULL) < KEYC_BSPACE) && server_client_assume_paste(s))
goto forward_key;

/*
* Work out the current key table. If the pane is in a mode, use
* the mode table instead of the default key table.
*/
if (server_client_is_default_key_table(c, c->keytable) &&
   wp != NULL((void *)0) &&
   (wme = TAILQ_FIRST(&wp->modes)((&wp->modes)->tqh_first)) != NULL((void *)0) &&
   wme->mode->key_table != NULL((void *)0))
table = key_bindings_get_table(wme->mode->key_table(wme), 1);
else
table = c->keytable;
first = table;

1295table_changed:
/*
* The prefix always takes precedence and forces a switch to the prefix
* table, unless we are already there.
*/
key0 = (key & (KEYC_MASK_KEY0x000fffffffffffULL|KEYC_MASK_MODIFIERS0x00f00000000000ULL));
if ((key0 == (key_code)options_get_number(s->options, "prefix") ||
   key0 == (key_code)options_get_number(s->options, "prefix2")) &&
   strcmp(table->name, "prefix") != 0) {
server_client_set_key_table(c, "prefix");
server_status_client(c);
goto out;
}
flags = c->flags;

1310try_again:
/* Log key table. */
if (wp == NULL((void *)0))
log_debug("key table %s (no pane)", table->name);
else
log_debug("key table %s (pane %%%u)", table->name, wp->id);
if (c->flags & CLIENT_REPEAT0x20)
log_debug("currently repeating");

/* Try to see if there is a key binding in the current table. */
bd = key_bindings_get(table, key0);
if (bd != NULL((void *)0)) {
/*
 * Key was matched in this table. If currently repeating but a
 * non-repeating binding was found, stop repeating and try
 * again in the root table.
 */
if ((c->flags & CLIENT_REPEAT0x20) &&
    (~bd->flags & KEY_BINDING_REPEAT0x1)) {
	log_debug("found in key table %s (not repeating)",
	    table->name);
	server_client_set_key_table(c, NULL((void *)0));
	first = table = c->keytable;
	c->flags &= ~CLIENT_REPEAT0x20;
	server_status_client(c);
	goto table_changed;
}
log_debug("found in key table %s", table->name);

/*
 * Take a reference to this table to make sure the key binding
 * doesn't disappear.
 */
table->references++;

/*
 * If this is a repeating key, start the timer. Otherwise reset
 * the client back to the root table.
 */
xtimeout = options_get_number(s->options, "repeat-time");
if (xtimeout != 0 && (bd->flags & KEY_BINDING_REPEAT0x1)) {
	c->flags |= CLIENT_REPEAT0x20;

	tv.tv_sec = xtimeout / 1000;
	tv.tv_usec = (xtimeout % 1000) * 1000L;
	evtimer_del(&c->repeat_timer)event_del(&c->repeat_timer);
	evtimer_add(&c->repeat_timer, &tv)event_add(&c->repeat_timer, &tv);
} else {
	c->flags &= ~CLIENT_REPEAT0x20;
	server_client_set_key_table(c, NULL((void *)0));
}
server_status_client(c);

/* Execute the key binding. */
key_bindings_dispatch(bd, item, c, event, &fs);
key_bindings_unref_table(table);
goto out;
}

/*
* No match, try the ANY key.
*/
if (key0 != KEYC_ANY) {
key0 = KEYC_ANY;
goto try_again;
}

/*
* No match in this table. If not in the root table or if repeating,
* switch the client back to the root table and try again.
*/
log_debug("not found in key table %s", table->name);
if (!server_client_is_default_key_table(c, table) ||
   (c->flags & CLIENT_REPEAT0x20)) {
log_debug("trying in root table");
server_client_set_key_table(c, NULL((void *)0));
table = c->keytable;
if (c->flags & CLIENT_REPEAT0x20)
	first = table;
c->flags &= ~CLIENT_REPEAT0x20;
server_status_client(c);
goto table_changed;
}

/*
* No match in the root table either. If this wasn't the first table
* tried, don't pass the key to the pane.
*/
if (first != table && (~flags & CLIENT_REPEAT0x20)) {
server_client_set_key_table(c, NULL((void *)0));
server_status_client(c);
goto out;
}

1404forward_key:
if (c->flags & CLIENT_READONLY0x800)
goto out;
if (wp != NULL((void *)0))
window_pane_key(wp, c, s, wl, key, m);

1410out:
if (s != NULL((void *)0) && key != KEYC_FOCUS_OUT)
server_client_update_latest(c);
free(event);
return (CMD_RETURN_NORMAL);
1415}

1417/* Handle a key event. */
1418int
1419server_client_handle_key(struct client *c, struct key_event *event)
1420{
struct session		*s = c->session;
struct cmdq_item	*item;

/* Check the client is good to accept input. */
if (s == NULL((void *)0) || (c->flags & CLIENT_UNATTACHEDFLAGS(0x200| 0x40| 0x4)))
return (0);

/*
* Key presses in overlay mode and the command prompt are a special
* case. The queue might be blocked so they need to be processed
* immediately rather than queued.
*/
if (~c->flags & CLIENT_READONLY0x800) {
if (c->message_string != NULL((void *)0)) {
	if (c->message_ignore_keys)
		return (0);
	status_message_clear(c);
}
if (c->overlay_key != NULL((void *)0)) {
	switch (c->overlay_key(c, c->overlay_data, event)) {
	case 0:
		return (0);
	case 1:
		server_client_clear_overlay(c);
		return (0);
	}
}
server_client_clear_overlay(c);
if (c->prompt_string != NULL((void *)0)) {
	if (status_prompt_key(c, event->key) == 0)
		return (0);
}
}

/*
* Add the key to the queue so it happens after any commands queued by
* previous keys.
*/
item = cmdq_get_callback(server_client_key_callback, event)cmdq_get_callback1("server_client_key_callback", server_client_key_callback
, event);
cmdq_append(c, item);
return (1);
1462}

1464/* Client functions that need to happen every loop. */
1465void
1466server_client_loop(void)
1467{
struct client		*c;
struct window		*w;
struct window_pane	*wp;

/* Check for window resize. This is done before redrawing. */
RB_FOREACH(w, windows, &windows)for ((w) = windows_RB_MINMAX(&windows, -1); (w) != ((void
 *)0); (w) = windows_RB_NEXT(w))
1
Assuming 'w' is equal to null→
2
←
Loop condition is false. Execution continues on line 1477→
server_client_check_window_resize(w);

/* Check clients. */
TAILQ_FOREACH(c, &clients, entry)for((c) = ((&clients)->tqh_first); (c) != ((void *)0);
 (c) = ((c)->entry.tqe_next)) {
3
←
Assuming 'c' is not equal to null→
4
←
Loop condition is true.  Entering loop body→
server_client_check_exit(c);
if (c->session != NULL((void *)0)) {
5
←
Assuming field 'session' is not equal to NULL→
6
←
Taking true branch→
	server_client_check_modes(c);
	server_client_check_redraw(c);
	server_client_reset_state(c);
7
←
Calling 'server_client_reset_state'→
}
}

/*
* Any windows will have been redrawn as part of clients, so clear
* their flags now.
*/
RB_FOREACH(w, windows, &windows)for ((w) = windows_RB_MINMAX(&windows, -1); (w) != ((void
 *)0); (w) = windows_RB_NEXT(w)) {
TAILQ_FOREACH(wp, &w->panes, entry)for((wp) = ((&w->panes)->tqh_first); (wp) != ((void
 *)0); (wp) = ((wp)->entry.tqe_next)) {
	if (wp->fd != -1) {
		server_client_check_pane_resize(wp);
		server_client_check_pane_buffer(wp);
	}
	wp->flags &= ~PANE_REDRAW0x1;
}
check_window_name(w);
}
1500}

1502/* Check if window needs to be resized. */
1503static void
1504server_client_check_window_resize(struct window *w)
1505{
struct winlink	*wl;

if (~w->flags & WINDOW_RESIZE0x20)
return;

TAILQ_FOREACH(wl, &w->winlinks, wentry)for((wl) = ((&w->winlinks)->tqh_first); (wl) != ((void
 *)0); (wl) = ((wl)->wentry.tqe_next)) {
if (wl->session->attached != 0 && wl->session->curw == wl)
	break;
}
if (wl == NULL((void *)0))
return;

log_debug("%s: resizing window @%u", __func__, w->id);
resize_window(w, w->new_sx, w->new_sy, w->new_xpixel, w->new_ypixel);
1520}

1522/* Resize timer event. */
1523static void
1524server_client_resize_timer(__unused__attribute__((__unused__)) int fd, __unused__attribute__((__unused__)) short events, void *data)
1525{
struct window_pane	*wp = data;

log_debug("%s: %%%u resize timer expired", __func__, wp->id);
evtimer_del(&wp->resize_timer)event_del(&wp->resize_timer);
1530}

1532/* Check if pane should be resized. */
1533static void
1534server_client_check_pane_resize(struct window_pane *wp)
1535{
struct window_pane_resize	*r;
struct window_pane_resize	*r1;
struct window_pane_resize	*first;
struct window_pane_resize	*last;
struct timeval			 tv = { .tv_usec = 250000 };

if (TAILQ_EMPTY(&wp->resize_queue)(((&wp->resize_queue)->tqh_first) == ((void *)0)))
return;

if (!event_initialized(&wp->resize_timer)((&wp->resize_timer)->ev_flags & 0x80))
evtimer_set(&wp->resize_timer, server_client_resize_timer, wp)event_set(&wp->resize_timer, -1, 0, server_client_resize_timer
, wp);
if (evtimer_pending(&wp->resize_timer, NULL)event_pending(&wp->resize_timer, 0x01, ((void *)0)))
return;

log_debug("%s: %%%u needs to be resized", __func__, wp->id);
TAILQ_FOREACH(r, &wp->resize_queue, entry)for((r) = ((&wp->resize_queue)->tqh_first); (r) != (
(void *)0); (r) = ((r)->entry.tqe_next)) {
log_debug("queued resize: %ux%u -> %ux%u", r->osx, r->osy,
    r->sx, r->sy);
}

/*
* There are three cases that matter:
*
* - Only one resize. It can just be applied.
*
* - Multiple resizes and the ending size is different from the
*   starting size. We can discard all resizes except the most recent.
*
* - Multiple resizes and the ending size is the same as the starting
*   size. We must resize at least twice to force the application to
*   redraw. So apply the first and leave the last on the queue for
*   next time.
*/
first = TAILQ_FIRST(&wp->resize_queue)((&wp->resize_queue)->tqh_first);
last = TAILQ_LAST(&wp->resize_queue, window_pane_resizes)(*(((struct window_pane_resizes *)((&wp->resize_queue)
->tqh_last))->tqh_last));
if (first == last) {
/* Only one resize. */
window_pane_send_resize(wp, first->sx, first->sy);
TAILQ_REMOVE(&wp->resize_queue, first, entry)do { if (((first)->entry.tqe_next) != ((void *)0)) (first)
->entry.tqe_next->entry.tqe_prev = (first)->entry.tqe_prev
; else (&wp->resize_queue)->tqh_last = (first)->
entry.tqe_prev; *(first)->entry.tqe_prev = (first)->entry
.tqe_next; ; ; } while (0);
free(first);
} else if (last->sx != first->osx || last->sy != first->osy) {
/* Multiple resizes ending up with a different size. */
window_pane_send_resize(wp, last->sx, last->sy);
TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1)for ((r) = ((&wp->resize_queue)->tqh_first); (r) !=
 ((void *)0) && ((r1) = ((r)->entry.tqe_next), 1);
 (r) = (r1)) {
	TAILQ_REMOVE(&wp->resize_queue, r, entry)do { if (((r)->entry.tqe_next) != ((void *)0)) (r)->entry
.tqe_next->entry.tqe_prev = (r)->entry.tqe_prev; else (
&wp->resize_queue)->tqh_last = (r)->entry.tqe_prev
; *(r)->entry.tqe_prev = (r)->entry.tqe_next; ; ; } while
 (0);
	free(r);
}
} else {
/*
 * Multiple resizes ending up with the same size. There will
 * not be more than one to the same size in succession so we
 * can just use the last-but-one on the list and leave the last
 * for later. We reduce the time until the next check to avoid
 * a long delay between the resizes.
 */
r = TAILQ_PREV(last, window_pane_resizes, entry)(*(((struct window_pane_resizes *)((last)->entry.tqe_prev)
)->tqh_last));
window_pane_send_resize(wp, r->sx, r->sy);
TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1)for ((r) = ((&wp->resize_queue)->tqh_first); (r) !=
 ((void *)0) && ((r1) = ((r)->entry.tqe_next), 1);
 (r) = (r1)) {
	if (r == last)
		break;
	TAILQ_REMOVE(&wp->resize_queue, r, entry)do { if (((r)->entry.tqe_next) != ((void *)0)) (r)->entry
.tqe_next->entry.tqe_prev = (r)->entry.tqe_prev; else (
&wp->resize_queue)->tqh_last = (r)->entry.tqe_prev
; *(r)->entry.tqe_prev = (r)->entry.tqe_next; ; ; } while
 (0);
	free(r);
}
tv.tv_usec = 10000;
}
evtimer_add(&wp->resize_timer, &tv)event_add(&wp->resize_timer, &tv);
1602}

1604/* Check pane buffer size. */
1605static void
1606server_client_check_pane_buffer(struct window_pane *wp)
1607{
struct evbuffer			*evb = wp->event->input;
size_t				 minimum;
struct client			*c;
struct window_pane_offset	*wpo;
int				 off = 1, flag;
u_int				 attached_clients = 0;
size_t				 new_size;

/*
* Work out the minimum used size. This is the most that can be removed
* from the buffer.
*/
minimum = wp->offset.used;
if (wp->pipe_fd != -1 && wp->pipe_offset.used < minimum)
minimum = wp->pipe_offset.used;
TAILQ_FOREACH(c, &clients, entry)for((c) = ((&clients)->tqh_first); (c) != ((void *)0);
 (c) = ((c)->entry.tqe_next)) {
if (c->session == NULL((void *)0))
	continue;
attached_clients++;

if (~c->flags & CLIENT_CONTROL0x2000) {
	off = 0;
	continue;
}
wpo = control_pane_offset(c, wp, &flag);
if (wpo == NULL((void *)0)) {
	off = 0;
	continue;
}
if (!flag)
	off = 0;

window_pane_get_new_data(wp, wpo, &new_size);
log_debug("%s: %s has %zu bytes used and %zu left for %%%u",
    __func__, c->name, wpo->used - wp->base_offset, new_size,
    wp->id);
if (wpo->used < minimum)
	minimum = wpo->used;
}
if (attached_clients == 0)
off = 0;
minimum -= wp->base_offset;
if (minimum == 0)
goto out;

/* Drain the buffer. */
log_debug("%s: %%%u has %zu minimum (of %zu) bytes used", __func__,
   wp->id, minimum, EVBUFFER_LENGTH(evb)(evb)->off);
evbuffer_drain(evb, minimum);

/*
* Adjust the base offset. If it would roll over, all the offsets into
* the buffer need to be adjusted.
*/
if (wp->base_offset > SIZE_MAX0xffffffffffffffffUL - minimum) {
log_debug("%s: %%%u base offset has wrapped", __func__, wp->id);
wp->offset.used -= wp->base_offset;
if (wp->pipe_fd != -1)
	wp->pipe_offset.used -= wp->base_offset;
TAILQ_FOREACH(c, &clients, entry)for((c) = ((&clients)->tqh_first); (c) != ((void *)0);
 (c) = ((c)->entry.tqe_next)) {
	if (c->session == NULL((void *)0) || (~c->flags & CLIENT_CONTROL0x2000))
		continue;
	wpo = control_pane_offset(c, wp, &flag);
	if (wpo != NULL((void *)0) && !flag)
		wpo->used -= wp->base_offset;
}
wp->base_offset = minimum;
} else
wp->base_offset += minimum;

1678out:
/*
* If there is data remaining, and there are no clients able to consume
* it, do not read any more. This is true when there are attached
* clients, all of which are control clients which are not able to
* accept any more data.
*/
log_debug("%s: pane %%%u is %s", __func__, wp->id, off ? "off" : "on");
if (off)
bufferevent_disable(wp->event, EV_READ0x02);
else
bufferevent_enable(wp->event, EV_READ0x02);
1690}

1692/*
* Update cursor position and mode settings. The scroll region and attributes
* are cleared when idle (waiting for an event) 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.
*/
1701static void
1702server_client_reset_state(struct client *c)
1703{
struct tty		*tty = &c->tty;
struct window		*w = c->session->curw->window;
struct window_pane	*wp = server_client_get_pane(c), *loop;
struct screen		*s = NULL((void *)0);
8
←
's' initialized to a null pointer value→
struct options		*oo = c->session->options;
int			 mode = 0, cursor, flags, n;
u_int			 cx = 0, cy = 0, ox, oy, sx, sy;

if (c->flags & (CLIENT_CONTROL0x2000|CLIENT_SUSPENDED0x40))
9
←
Assuming the condition is false→
10
←
Taking false branch→
return;

/* Disable the block flag. */
flags = (tty->flags & TTY_BLOCK0x80);
tty->flags &= ~TTY_BLOCK0x80;

/* Get mode from overlay if any, else from screen. */
if (c->overlay_draw != NULL((void *)0)) {
11
←
Assuming field 'overlay_draw' is not equal to NULL→
12
←
Taking true branch→
if (c->overlay_mode != NULL((void *)0))
13
←
Assuming field 'overlay_mode' is equal to NULL→
14
←
Taking false branch→
	s = c->overlay_mode(c, c->overlay_data, &cx, &cy);
} else
s = wp->screen;
if (s14.1
's' is equal to NULL
 != NULL((void *)0))
15
←
Taking false branch→
mode = s->mode;
if (log_get_level() != 0) {
16
←
Assuming the condition is false→
17
←
Taking false branch→
log_debug("%s: client %s mode %s", __func__, c->name,
    screen_mode_to_string(mode));
}

/* Reset region and margin. */
tty_region_off(tty);
tty_margin_off(tty);

/* Move cursor to pane cursor and offset. */
if (c->prompt_string != NULL((void *)0)) {
18
←
Assuming field 'prompt_string' is equal to NULL→
19
←
Taking false branch→
n = options_get_number(c->session->options, "status-position");
if (n == 0)
	cy = 0;
else {
	n = status_line_size(c);
	if (n == 0)
		cy = tty->sy - 1;
	else
		cy = tty->sy - n;
}
cx = c->prompt_cursor;
mode &= ~MODE_CURSOR0x1;
} else if (c->overlay_draw == NULL((void *)0)) {
20
←
Assuming field 'overlay_draw' is equal to NULL→
21
←
Taking true branch→
cursor = 0;
tty_window_offset(tty, &ox, &oy, &sx, &sy);
if (wp->xoff + s->cx >= ox && wp->xoff + s->cx <= ox + sx &&
22
←
Access to field 'cx' results in a dereference of a null pointer (loaded from variable 's')
    wp->yoff + s->cy >= oy && wp->yoff + s->cy <= oy + sy) {
	cursor = 1;

	cx = wp->xoff + s->cx - ox;
	cy = wp->yoff + s->cy - oy;

	if (status_at_line(c) == 0)
		cy += status_line_size(c);
}
if (!cursor)
	mode &= ~MODE_CURSOR0x1;
}
log_debug("%s: cursor to %u,%u", __func__, cx, cy);
tty_cursor(tty, cx, cy);

/*
* Set mouse mode if requested. To support dragging, always use button
* mode.
*/
if (options_get_number(oo, "mouse")) {
if (c->overlay_draw == NULL((void *)0)) {
	mode &= ~ALL_MOUSE_MODES(0x20|0x40|0x1000);
	TAILQ_FOREACH(loop, &w->panes, entry)for((loop) = ((&w->panes)->tqh_first); (loop) != ((
void *)0); (loop) = ((loop)->entry.tqe_next)) {
		if (loop->screen->mode & MODE_MOUSE_ALL0x1000)
			mode |= MODE_MOUSE_ALL0x1000;
	}
}
if (~mode & MODE_MOUSE_ALL0x1000)
	mode |= MODE_MOUSE_BUTTON0x40;
}

/* Clear bracketed paste mode if at the prompt. */
if (c->overlay_draw == NULL((void *)0) && c->prompt_string != NULL((void *)0))
mode &= ~MODE_BRACKETPASTE0x400;

/* Set the terminal mode and reset attributes. */
tty_update_mode(tty, mode, s);
tty_reset(tty);

/* All writing must be done, send a sync end (if it was started). */
tty_sync_end(tty);
tty->flags |= flags;
1796}

1798/* Repeat time callback. */
1799static void
1800server_client_repeat_timer(__unused__attribute__((__unused__)) int fd, __unused__attribute__((__unused__)) short events, void *data)
1801{
struct client	*c = data;

if (c->flags & CLIENT_REPEAT0x20) {
server_client_set_key_table(c, NULL((void *)0));
c->flags &= ~CLIENT_REPEAT0x20;
server_status_client(c);
}
1809}

1811/* Double-click callback. */
1812static void
1813server_client_click_timer(__unused__attribute__((__unused__)) int fd, __unused__attribute__((__unused__)) short events, void *data)
1814{
struct client		*c = data;
struct key_event	*event;

log_debug("click timer expired");

if (c->flags & CLIENT_TRIPLECLICK0x200000) {
/*
 * Waiting for a third click that hasn't happened, so this must
 * have been a double click.
 */
event = xmalloc(sizeof *event);
event->key = KEYC_DOUBLECLICK;
memcpy(&event->m, &c->click_event, sizeof event->m);
if (!server_client_handle_key(c, event))
	free(event);
}
c->flags &= ~(CLIENT_DOUBLECLICK0x100000|CLIENT_TRIPLECLICK0x200000);
1832}

1834/* Check if client should be exited. */
1835static void
1836server_client_check_exit(struct client *c)
1837{
struct client_file	*cf;
const char		*name = c->exit_session;
char			*data;
size_t			 size, msize;

if (c->flags & (CLIENT_DEAD0x200|CLIENT_EXITED0x100))
return;
if (~c->flags & CLIENT_EXIT0x4)
return;

if (c->flags & CLIENT_CONTROL0x2000) {
control_discard(c);
if (!control_all_done(c))
	return;
}
RB_FOREACH(cf, client_files, &c->files)for ((cf) = client_files_RB_MINMAX(&c->files, -1); (cf
) != ((void *)0); (cf) = client_files_RB_NEXT(cf)) {
if (EVBUFFER_LENGTH(cf->buffer)(cf->buffer)->off != 0)
	return;
}
c->flags |= CLIENT_EXITED0x100;

switch (c->exit_type) {
case CLIENT_EXIT_RETURN:
if (c->exit_message != NULL((void *)0))
	msize = strlen(c->exit_message) + 1;
else
	msize = 0;
size = (sizeof c->retval) + msize;
data = xmalloc(size);
memcpy(data, &c->retval, sizeof c->retval);
if (c->exit_message != NULL((void *)0))
	memcpy(data + sizeof c->retval, c->exit_message, msize);
proc_send(c->peer, MSG_EXIT, -1, data, size);
free(data);
break;
case CLIENT_EXIT_SHUTDOWN:
proc_send(c->peer, MSG_SHUTDOWN, -1, NULL((void *)0), 0);
break;
case CLIENT_EXIT_DETACH:
proc_send(c->peer, c->exit_msgtype, -1, name, strlen(name) + 1);
break;
}
free(c->exit_session);
free(c->exit_message);
1882}

1884/* Redraw timer callback. */
1885static void
1886server_client_redraw_timer(__unused__attribute__((__unused__)) int fd, __unused__attribute__((__unused__)) short events,
  __unused__attribute__((__unused__)) void *data)
1888{
log_debug("redraw timer fired");
1890}

1892/*
* Check if modes need to be updated. Only modes in the current window are
* updated and it is done when the status line is redrawn.
*/
1896static void
1897server_client_check_modes(struct client *c)
1898{
struct window			*w = c->session->curw->window;
struct window_pane		*wp;
struct window_mode_entry	*wme;

if (c->flags & (CLIENT_CONTROL0x2000|CLIENT_SUSPENDED0x40))
return;
if (~c->flags & CLIENT_REDRAWSTATUS0x10)
return;
TAILQ_FOREACH(wp, &w->panes, entry)for((wp) = ((&w->panes)->tqh_first); (wp) != ((void
 *)0); (wp) = ((wp)->entry.tqe_next)) {
wme = TAILQ_FIRST(&wp->modes)((&wp->modes)->tqh_first);
if (wme != NULL((void *)0) && wme->mode->update != NULL((void *)0))
	wme->mode->update(wme);
}
1912}

1914/* Check for client redraws. */
1915static void
1916server_client_check_redraw(struct client *c)
1917{
struct session		*s = c->session;
struct tty		*tty = &c->tty;
struct window		*w = c->session->curw->window;
struct window_pane	*wp;
int			 needed, flags, mode = tty->mode, new_flags = 0;
int			 redraw;
u_int			 bit = 0;
struct timeval		 tv = { .tv_usec = 1000 };
static struct event	 ev;
size_t			 left;

if (c->flags & (CLIENT_CONTROL0x2000|CLIENT_SUSPENDED0x40))
return;
if (c->flags & CLIENT_ALLREDRAWFLAGS(0x8| 0x10| 0x1000000| 0x400| 0x2000000| 0x20000000)) {
log_debug("%s: redraw%s%s%s%s%s", c->name,
    (c->flags & CLIENT_REDRAWWINDOW0x8) ? " window" : "",
    (c->flags & CLIENT_REDRAWSTATUS0x10) ? " status" : "",
    (c->flags & CLIENT_REDRAWBORDERS0x400) ? " borders" : "",
    (c->flags & CLIENT_REDRAWOVERLAY0x2000000) ? " overlay" : "",
    (c->flags & CLIENT_REDRAWPANES0x20000000) ? " panes" : "");
}

/*
* If there is outstanding data, defer the redraw until it has been
* consumed. We can just add a timer to get out of the event loop and
* end up back here.
*/
needed = 0;
if (c->flags & CLIENT_ALLREDRAWFLAGS(0x8| 0x10| 0x1000000| 0x400| 0x2000000| 0x20000000))
needed = 1;
else {
TAILQ_FOREACH(wp, &w->panes, entry)for((wp) = ((&w->panes)->tqh_first); (wp) != ((void
 *)0); (wp) = ((wp)->entry.tqe_next)) {
	if (wp->flags & PANE_REDRAW0x1) {
		needed = 1;
		break;
	}
}
if (needed)
	new_flags |= CLIENT_REDRAWPANES0x20000000;
}
if (needed && (left = EVBUFFER_LENGTH(tty->out)(tty->out)->off) != 0) {
log_debug("%s: redraw deferred (%zu left)", c->name, left);
if (!evtimer_initialized(&ev)((&ev)->ev_flags & 0x80))
	evtimer_set(&ev, server_client_redraw_timer, NULL)event_set(&ev, -1, 0, server_client_redraw_timer, ((void *
)0));
if (!evtimer_pending(&ev, NULL)event_pending(&ev, 0x01, ((void *)0))) {
	log_debug("redraw timer started");
	evtimer_add(&ev, &tv)event_add(&ev, &tv);
}

if (~c->flags & CLIENT_REDRAWWINDOW0x8) {
	TAILQ_FOREACH(wp, &w->panes, entry)for((wp) = ((&w->panes)->tqh_first); (wp) != ((void
 *)0); (wp) = ((wp)->entry.tqe_next)) {
		if (wp->flags & PANE_REDRAW0x1) {
			log_debug("%s: pane %%%u needs redraw",
			    c->name, wp->id);
			c->redraw_panes |= (1 << bit);
		}
		if (++bit == 64) {
			/*
			 * If more that 64 panes, give up and
			 * just redraw the window.
			 */
			new_flags &= CLIENT_REDRAWPANES0x20000000;
			new_flags |= CLIENT_REDRAWWINDOW0x8;
			break;
		}
	}
	if (c->redraw_panes != 0)
		c->flags |= CLIENT_REDRAWPANES0x20000000;
}
c->flags |= new_flags;
return;
} else if (needed)
log_debug("%s: redraw needed", c->name);

flags = tty->flags & (TTY_BLOCK0x80|TTY_FREEZE0x2|TTY_NOCURSOR0x1);
tty->flags = (tty->flags & ~(TTY_BLOCK0x80|TTY_FREEZE0x2))|TTY_NOCURSOR0x1;

if (~c->flags & CLIENT_REDRAWWINDOW0x8) {
/*
 * If not redrawing the entire window, check whether each pane
 * needs to be redrawn.
 */
TAILQ_FOREACH(wp, &w->panes, entry)for((wp) = ((&w->panes)->tqh_first); (wp) != ((void
 *)0); (wp) = ((wp)->entry.tqe_next)) {
	redraw = 0;
	if (wp->flags & PANE_REDRAW0x1)
		redraw = 1;
	else if (c->flags & CLIENT_REDRAWPANES0x20000000)
		redraw = !!(c->redraw_panes & (1 << bit));
	bit++;
	if (!redraw)
		continue;
	log_debug("%s: redrawing pane %%%u", __func__, wp->id);
	screen_redraw_pane(c, wp);
}
c->redraw_panes = 0;
c->flags &= ~CLIENT_REDRAWPANES0x20000000;
}

if (c->flags & CLIENT_ALLREDRAWFLAGS(0x8| 0x10| 0x1000000| 0x400| 0x2000000| 0x20000000)) {
if (options_get_number(s->options, "set-titles"))
	server_client_set_title(c);
screen_redraw_screen(c);
}

tty->flags = (tty->flags & ~TTY_NOCURSOR0x1)|(flags & TTY_NOCURSOR0x1);
tty_update_mode(tty, mode, NULL((void *)0));
tty->flags = (tty->flags & ~(TTY_BLOCK0x80|TTY_FREEZE0x2|TTY_NOCURSOR0x1))|flags;

c->flags &= ~(CLIENT_ALLREDRAWFLAGS(0x8| 0x10| 0x1000000| 0x400| 0x2000000| 0x20000000)|CLIENT_STATUSFORCE0x80000);

if (needed) {
/*
 * We would have deferred the redraw unless the output buffer
 * was empty, so we can record how many bytes the redraw
 * generated.
 */
c->redraw = EVBUFFER_LENGTH(tty->out)(tty->out)->off;
log_debug("%s: redraw added %zu bytes", c->name, c->redraw);
}
2037}

2039/* Set client title. */
2040static void
2041server_client_set_title(struct client *c)
2042{
struct session		*s = c->session;
const char		*template;
char			*title;
struct format_tree	*ft;

template = options_get_string(s->options, "set-titles-string");

ft = format_create(c, NULL((void *)0), FORMAT_NONE0, 0);
format_defaults(ft, c, NULL((void *)0), NULL((void *)0), NULL((void *)0));

title = format_expand_time(ft, template);
if (c->title == NULL((void *)0) || strcmp(title, c->title) != 0) {
free(c->title);
c->title = xstrdup(title);
tty_set_title(&c->tty, c->title);
}
free(title);

format_free(ft);
2062}

2064/* Dispatch message from client. */
2065static void
2066server_client_dispatch(struct imsg *imsg, void *arg)
2067{
struct client	*c = arg;
ssize_t		 datalen;
struct session	*s;

if (c->flags & CLIENT_DEAD0x200)
return;

if (imsg == NULL((void *)0)) {
server_client_lost(c);
return;
}

datalen = imsg->hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr);

switch (imsg->hdr.type) {
case MSG_IDENTIFY_CLIENTPID:
case MSG_IDENTIFY_CWD:
case MSG_IDENTIFY_ENVIRON:
case MSG_IDENTIFY_FEATURES:
case MSG_IDENTIFY_FLAGS:
case MSG_IDENTIFY_LONGFLAGS:
case MSG_IDENTIFY_STDIN:
case MSG_IDENTIFY_STDOUT:
case MSG_IDENTIFY_TERM:
case MSG_IDENTIFY_TERMINFO:
case MSG_IDENTIFY_TTYNAME:
case MSG_IDENTIFY_DONE:
server_client_dispatch_identify(c, imsg);
break;
case MSG_COMMAND:
server_client_dispatch_command(c, imsg);
break;
case MSG_RESIZE:
if (datalen != 0)
	fatalx("bad MSG_RESIZE size");

if (c->flags & CLIENT_CONTROL0x2000)
	break;
server_client_update_latest(c);
tty_resize(&c->tty);
recalculate_sizes();
if (c->overlay_resize == NULL((void *)0))
	server_client_clear_overlay(c);
else
	c->overlay_resize(c, c->overlay_data);
server_redraw_client(c);
if (c->session != NULL((void *)0))
	notify_client("client-resized", c);
break;
case MSG_EXITING:
if (datalen != 0)
	fatalx("bad MSG_EXITING size");
server_client_set_session(c, NULL((void *)0));
recalculate_sizes();
tty_close(&c->tty);
proc_send(c->peer, MSG_EXITED, -1, NULL((void *)0), 0);
break;
case MSG_WAKEUP:
case MSG_UNLOCK:
if (datalen != 0)
	fatalx("bad MSG_WAKEUP size");

if (!(c->flags & CLIENT_SUSPENDED0x40))
	break;
c->flags &= ~CLIENT_SUSPENDED0x40;

if (c->fd == -1 || c->session == NULL((void *)0)) /* exited already */
	break;
s = c->session;

if (gettimeofday(&c->activity_time, NULL((void *)0)) != 0)
	fatal("gettimeofday failed");

tty_start_tty(&c->tty);
server_redraw_client(c);
recalculate_sizes();

if (s != NULL((void *)0))
	session_update_activity(s, &c->activity_time);
break;
case MSG_SHELL:
if (datalen != 0)
	fatalx("bad MSG_SHELL size");

server_client_dispatch_shell(c);
break;
case MSG_WRITE_READY:
file_write_ready(&c->files, imsg);
break;
case MSG_READ:
file_read_data(&c->files, imsg);
break;
case MSG_READ_DONE:
file_read_done(&c->files, imsg);
break;
}
2164}

2166/* Callback when command is done. */
2167static enum cmd_retval
2168server_client_command_done(struct cmdq_item *item, __unused__attribute__((__unused__)) void *data)
2169{
struct client	*c = cmdq_get_client(item);

if (~c->flags & CLIENT_ATTACHED0x80)
c->flags |= CLIENT_EXIT0x4;
else if (~c->flags & CLIENT_EXIT0x4)
tty_send_requests(&c->tty);
return (CMD_RETURN_NORMAL);
2177}

2179/* Handle command message. */
2180static void
2181server_client_dispatch_command(struct client *c, struct imsg *imsg)
2182{
struct msg_command	  data;
char			 *buf;
size_t			  len;
int			  argc;
char			**argv, *cause;
struct cmd_parse_result	 *pr;
struct args_value	 *values;

if (c->flags & CLIENT_EXIT0x4)
return;

if (imsg->hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr) < sizeof data)
fatalx("bad MSG_COMMAND size");
memcpy(&data, imsg->data, sizeof data);

buf = (char *)imsg->data + sizeof data;
len = imsg->hdr.len  - IMSG_HEADER_SIZEsizeof(struct imsg_hdr) - sizeof data;
if (len > 0 && buf[len - 1] != '\0')
fatalx("bad MSG_COMMAND string");

argc = data.argc;
if (cmd_unpack_argv(buf, len, argc, &argv) != 0) {
cause = xstrdup("command too long");
goto error;
}

if (argc == 0) {
argc = 1;
argv = xcalloc(1, sizeof *argv);
*argv = xstrdup("new-session");
}

values = args_from_vector(argc, argv);
pr = cmd_parse_from_arguments(values, argc, NULL((void *)0));
switch (pr->status) {
case CMD_PARSE_ERROR:
cause = pr->error;
goto error;
case CMD_PARSE_SUCCESS:
break;
}
args_free_values(values, argc);
free(values);
cmd_free_argv(argc, argv);

cmdq_append(c, cmdq_get_command(pr->cmdlist, NULL((void *)0)));
cmdq_append(c, cmdq_get_callback(server_client_command_done, NULL)cmdq_get_callback1("server_client_command_done", server_client_command_done
, ((void *)0)));

cmd_list_free(pr->cmdlist);
return;

2234error:
cmd_free_argv(argc, argv);

cmdq_append(c, cmdq_get_error(cause));
free(cause);

c->flags |= CLIENT_EXIT0x4;
2241}

2243/* Handle identify message. */
2244static void
2245server_client_dispatch_identify(struct client *c, struct imsg *imsg)
2246{
const char	*data, *home;
size_t		 datalen;
int		 flags, feat;
uint64_t	 longflags;
char		*name;

if (c->flags & CLIENT_IDENTIFIED0x40000)
fatalx("out-of-order identify message");

data = imsg->data;
datalen = imsg->hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr);

switch (imsg->hdr.type)	{
case MSG_IDENTIFY_FEATURES:
if (datalen != sizeof feat)
	fatalx("bad MSG_IDENTIFY_FEATURES size");
memcpy(&feat, data, sizeof feat);
c->term_features |= feat;
log_debug("client %p IDENTIFY_FEATURES %s", c,
    tty_get_features(feat));
break;
case MSG_IDENTIFY_FLAGS:
if (datalen != sizeof flags)
	fatalx("bad MSG_IDENTIFY_FLAGS size");
memcpy(&flags, data, sizeof flags);
c->flags |= flags;
log_debug("client %p IDENTIFY_FLAGS %#x", c, flags);
break;
case MSG_IDENTIFY_LONGFLAGS:
if (datalen != sizeof longflags)
	fatalx("bad MSG_IDENTIFY_LONGFLAGS size");
memcpy(&longflags, data, sizeof longflags);
c->flags |= longflags;
log_debug("client %p IDENTIFY_LONGFLAGS %#llx", c,
    (unsigned long long)longflags);
break;
case MSG_IDENTIFY_TERM:
if (datalen == 0 || data[datalen - 1] != '\0')
	fatalx("bad MSG_IDENTIFY_TERM string");
if (*data == '\0')
	c->term_name = xstrdup("unknown");
else
	c->term_name = xstrdup(data);
log_debug("client %p IDENTIFY_TERM %s", c, data);
break;
case MSG_IDENTIFY_TERMINFO:
if (datalen == 0 || data[datalen - 1] != '\0')
	fatalx("bad MSG_IDENTIFY_TERMINFO string");
c->term_caps = xreallocarray(c->term_caps, c->term_ncaps + 1,
    sizeof *c->term_caps);
c->term_caps[c->term_ncaps++] = xstrdup(data);
log_debug("client %p IDENTIFY_TERMINFO %s", c, data);
break;
case MSG_IDENTIFY_TTYNAME:
if (datalen == 0 || data[datalen - 1] != '\0')
	fatalx("bad MSG_IDENTIFY_TTYNAME string");
c->ttyname = xstrdup(data);
log_debug("client %p IDENTIFY_TTYNAME %s", c, data);
break;
case MSG_IDENTIFY_CWD:
if (datalen == 0 || data[datalen - 1] != '\0')
	fatalx("bad MSG_IDENTIFY_CWD string");
if (access(data, X_OK0x01) == 0)
	c->cwd = xstrdup(data);
else if ((home = find_home()) != NULL((void *)0))
	c->cwd = xstrdup(home);
else
	c->cwd = xstrdup("/");
log_debug("client %p IDENTIFY_CWD %s", c, data);
break;
case MSG_IDENTIFY_STDIN:
if (datalen != 0)
	fatalx("bad MSG_IDENTIFY_STDIN size");
c->fd = imsg->fd;
log_debug("client %p IDENTIFY_STDIN %d", c, imsg->fd);
break;
case MSG_IDENTIFY_STDOUT:
if (datalen != 0)
	fatalx("bad MSG_IDENTIFY_STDOUT size");
c->out_fd = imsg->fd;
log_debug("client %p IDENTIFY_STDOUT %d", c, imsg->fd);
break;
case MSG_IDENTIFY_ENVIRON:
if (datalen == 0 || data[datalen - 1] != '\0')
	fatalx("bad MSG_IDENTIFY_ENVIRON string");
if (strchr(data, '=') != NULL((void *)0))
	environ_put(c->environ, data, 0);
log_debug("client %p IDENTIFY_ENVIRON %s", c, data);
break;
case MSG_IDENTIFY_CLIENTPID:
if (datalen != sizeof c->pid)
	fatalx("bad MSG_IDENTIFY_CLIENTPID size");
memcpy(&c->pid, data, sizeof c->pid);
log_debug("client %p IDENTIFY_CLIENTPID %ld", c, (long)c->pid);
break;
default:
break;
}

if (imsg->hdr.type != MSG_IDENTIFY_DONE)
return;
c->flags |= CLIENT_IDENTIFIED0x40000;

if (*c->ttyname != '\0')
name = xstrdup(c->ttyname);
else
xasprintf(&name, "client-%ld", (long)c->pid);
c->name = name;
log_debug("client %p name is %s", c, c->name);

if (c->flags & CLIENT_CONTROL0x2000)
control_start(c);
else if (c->fd != -1) {
if (tty_init(&c->tty, c) != 0) {
	close(c->fd);
	c->fd = -1;
} else {
	tty_resize(&c->tty);
	c->flags |= CLIENT_TERMINAL0x1;
}
close(c->out_fd);
c->out_fd = -1;
}

/*
* If this is the first client, load configuration files. Any later
* clients are allowed to continue with their command even if the
* config has not been loaded - they might have been run from inside it
*/
if ((~c->flags & CLIENT_EXIT0x4) &&
    !cfg_finished &&
    c == TAILQ_FIRST(&clients)((&clients)->tqh_first))
start_cfg();
2380}

2382/* Handle shell message. */
2383static void
2384server_client_dispatch_shell(struct client *c)
2385{
const char	*shell;

shell = options_get_string(global_s_options, "default-shell");
if (!checkshell(shell))
shell = _PATH_BSHELL"/bin/sh";
proc_send(c->peer, MSG_SHELL, -1, shell, strlen(shell) + 1);

proc_kill_peer(c->peer);
2394}

2396/* Get client working directory. */
2397const char *
2398server_client_get_cwd(struct client *c, struct session *s)
2399{
const char	*home;

if (!cfg_finished && cfg_client != NULL((void *)0))
return (cfg_client->cwd);
if (c != NULL((void *)0) && c->session == NULL((void *)0) && c->cwd != NULL((void *)0))
return (c->cwd);
if (s != NULL((void *)0) && s->cwd != NULL((void *)0))
return (s->cwd);
if (c != NULL((void *)0) && (s = c->session) != NULL((void *)0) && s->cwd != NULL((void *)0))
return (s->cwd);
if ((home = find_home()) != NULL((void *)0))
return (home);
return ("/");
2413}

2415/* Get control client flags. */
2416static uint64_t
2417server_client_control_flags(struct client *c, const char *next)
2418{
if (strcmp(next, "pause-after") == 0) {
c->pause_age = 0;
return (CLIENT_CONTROL_PAUSEAFTER0x100000000ULL);
}
if (sscanf(next, "pause-after=%u", &c->pause_age) == 1) {
c->pause_age *= 1000;
return (CLIENT_CONTROL_PAUSEAFTER0x100000000ULL);
}
if (strcmp(next, "no-output") == 0)
return (CLIENT_CONTROL_NOOUTPUT0x4000000);
if (strcmp(next, "wait-exit") == 0)
return (CLIENT_CONTROL_WAITEXIT0x200000000ULL);
return (0);
2432}

2434/* Set client flags. */
2435void
2436server_client_set_flags(struct client *c, const char *flags)
2437{
char	*s, *copy, *next;
uint64_t flag;
int	 not;

s = copy = xstrdup(flags);
while ((next = strsep(&s, ",")) != NULL((void *)0)) {
not = (*next == '!');
if (not)
	next++;

if (c->flags & CLIENT_CONTROL0x2000)
	flag = server_client_control_flags(c, next);
else
	flag = 0;
if (strcmp(next, "read-only") == 0)
	flag = CLIENT_READONLY0x800;
else if (strcmp(next, "ignore-size") == 0)
	flag = CLIENT_IGNORESIZE0x20000;
else if (strcmp(next, "active-pane") == 0)
	flag = CLIENT_ACTIVEPANE0x80000000ULL;
if (flag == 0)
	continue;

log_debug("client %s set flag %s", c->name, next);
if (not)
	c->flags &= ~flag;
else
	c->flags |= flag;
if (flag == CLIENT_CONTROL_NOOUTPUT0x4000000)
	control_reset_offsets(c);
}
free(copy);
proc_send(c->peer, MSG_FLAGS, -1, &c->flags, sizeof c->flags);
2471}

2473/* Get client flags. This is only flags useful to show to users. */
2474const char *
2475server_client_get_flags(struct client *c)
2476{
static char	s[256];
char	 	tmp[32];

*s = '\0';
if (c->flags & CLIENT_ATTACHED0x80)
strlcat(s, "attached,", sizeof s);
if (c->flags & CLIENT_FOCUSED0x8000)
strlcat(s, "focused,", sizeof s);
if (c->flags & CLIENT_CONTROL0x2000)
strlcat(s, "control-mode,", sizeof s);
if (c->flags & CLIENT_IGNORESIZE0x20000)
strlcat(s, "ignore-size,", sizeof s);
if (c->flags & CLIENT_CONTROL_NOOUTPUT0x4000000)
strlcat(s, "no-output,", sizeof s);
if (c->flags & CLIENT_CONTROL_WAITEXIT0x200000000ULL)
strlcat(s, "wait-exit,", sizeof s);
if (c->flags & CLIENT_CONTROL_PAUSEAFTER0x100000000ULL) {
xsnprintf(tmp, sizeof tmp, "pause-after=%u,",
    c->pause_age / 1000);
strlcat(s, tmp, sizeof s);
}
if (c->flags & CLIENT_READONLY0x800)
strlcat(s, "read-only,", sizeof s);
if (c->flags & CLIENT_ACTIVEPANE0x80000000ULL)
strlcat(s, "active-pane,", sizeof s);
if (c->flags & CLIENT_SUSPENDED0x40)
strlcat(s, "suspended,", sizeof s);
if (c->flags & CLIENT_UTF80x10000)
strlcat(s, "UTF-8,", sizeof s);
if (*s != '\0')
s[strlen(s) - 1] = '\0';
return (s);
2509}

2511/* Get client window. */
2512struct client_window *
2513server_client_get_client_window(struct client *c, u_int id)
2514{
struct client_window	cw = { .window = id };

return (RB_FIND(client_windows, &c->windows, &cw)client_windows_RB_FIND(&c->windows, &cw));
2518}

2520/* Add client window. */
2521struct client_window *
2522server_client_add_client_window(struct client *c, u_int id)
2523{
struct client_window	*cw;

cw = server_client_get_client_window(c, id);
if (cw == NULL((void *)0)) {
cw = xcalloc(1, sizeof *cw);
cw->window = id;
RB_INSERT(client_windows, &c->windows, cw)client_windows_RB_INSERT(&c->windows, cw);
}
return cw;
2533}

2535/* Get client active pane. */
2536struct window_pane *
2537server_client_get_pane(struct client *c)
2538{
struct session		*s = c->session;
struct client_window	*cw;

if (s == NULL((void *)0))
return (NULL((void *)0));

if (~c->flags & CLIENT_ACTIVEPANE0x80000000ULL)
return (s->curw->window->active);
cw = server_client_get_client_window(c, s->curw->window->id);
if (cw == NULL((void *)0))
return (s->curw->window->active);
return (cw->pane);
2551}

2553/* Set client active pane. */
2554void
2555server_client_set_pane(struct client *c, struct window_pane *wp)
2556{
struct session		*s = c->session;
struct client_window	*cw;

if (s == NULL((void *)0))
return;

cw = server_client_add_client_window(c, s->curw->window->id);
cw->pane = wp;
log_debug("%s pane now %%%u", c->name, wp->id);
2566}

2568/* Remove pane from client lists. */
2569void
2570server_client_remove_pane(struct window_pane *wp)
2571{
struct client		*c;
struct window		*w = wp->window;
struct client_window	*cw;

TAILQ_FOREACH(c, &clients, entry)for((c) = ((&clients)->tqh_first); (c) != ((void *)0);
 (c) = ((c)->entry.tqe_next)) {
cw = server_client_get_client_window(c, w->id);
if (cw != NULL((void *)0) && cw->pane == wp) {
	RB_REMOVE(client_windows, &c->windows, cw)client_windows_RB_REMOVE(&c->windows, cw);
	free(cw);
}
}
2583}