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tmux/server-client.c

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/* $OpenBSD$ */
/*
* 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.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <imsg.h>
#include <paths.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
static void server_client_free(int, short, void *);
static void server_client_check_focus(struct window_pane *);
static void server_client_check_resize(struct window_pane *);
static key_code server_client_check_mouse(struct client *);
static void server_client_repeat_timer(int, short, void *);
static void server_client_click_timer(int, short, void *);
static void server_client_check_exit(struct client *);
static void server_client_check_redraw(struct client *);
static void server_client_set_title(struct client *);
static void server_client_reset_state(struct client *);
static int server_client_assume_paste(struct session *);
static void server_client_dispatch(struct imsg *, void *);
static void server_client_dispatch_command(struct client *, struct imsg *);
static void server_client_dispatch_identify(struct client *, struct imsg *);
static void server_client_dispatch_shell(struct client *);
/* Idenfity mode callback. */
static void
server_client_callback_identify(__unused int fd, __unused short events, void *data)
{
server_client_clear_identify(data, NULL);
}
/* Set identify mode on client. */
void
server_client_set_identify(struct client *c)
{
struct timeval tv;
int delay;
delay = options_get_number(c->session->options, "display-panes-time");
tv.tv_sec = delay / 1000;
tv.tv_usec = (delay % 1000) * 1000L;
if (event_initialized(&c->identify_timer))
evtimer_del(&c->identify_timer);
evtimer_set(&c->identify_timer, server_client_callback_identify, c);
evtimer_add(&c->identify_timer, &tv);
c->flags |= CLIENT_IDENTIFY;
c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
server_redraw_client(c);
}
/* Clear identify mode on client. */
void
server_client_clear_identify(struct client *c, struct window_pane *wp)
{
if (~c->flags & CLIENT_IDENTIFY)
return;
c->flags &= ~CLIENT_IDENTIFY;
if (c->identify_callback != NULL)
c->identify_callback(c, wp);
c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
server_redraw_client(c);
}
/* Check if this client is inside this server. */
int
server_client_check_nested(struct client *c)
{
struct environ_entry *envent;
struct window_pane *wp;
if (c->tty.path == NULL)
return (0);
envent = environ_find(c->environ, "TMUX");
if (envent == NULL || *envent->value == '\0')
return (0);
RB_FOREACH(wp, window_pane_tree, &all_window_panes) {
if (strcmp(wp->tty, c->tty.path) == 0)
return (1);
}
return (0);
}
/* Set client key table. */
void
server_client_set_key_table(struct client *c, const char *name)
{
if (name == NULL)
name = server_client_get_key_table(c);
key_bindings_unref_table(c->keytable);
c->keytable = key_bindings_get_table(name, 1);
c->keytable->references++;
}
/* Get default key table. */
const char *
server_client_get_key_table(struct client *c)
{
struct session *s = c->session;
const char *name;
if (s == NULL)
return ("root");
name = options_get_string(s->options, "key-table");
if (*name == '\0')
return ("root");
return (name);
}
/* Is this client using the default key table? */
int
server_client_is_default_key_table(struct client *c)
{
return (strcmp(c->keytable->name, server_client_get_key_table(c)) == 0);
}
/* Create a new client. */
void
server_client_create(int fd)
{
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) != 0)
fatal("gettimeofday failed");
memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
c->environ = environ_create();
c->fd = -1;
c->cwd = NULL;
TAILQ_INIT(&c->queue);
c->stdin_data = evbuffer_new();
c->stdout_data = evbuffer_new();
c->stderr_data = evbuffer_new();
c->tty.fd = -1;
c->title = NULL;
c->session = NULL;
c->last_session = NULL;
c->tty.sx = 80;
c->tty.sy = 24;
screen_init(&c->status, c->tty.sx, 1, 0);
c->message_string = NULL;
TAILQ_INIT(&c->message_log);
c->prompt_string = NULL;
c->prompt_buffer = NULL;
c->prompt_index = 0;
c->flags |= CLIENT_FOCUSED;
c->keytable = key_bindings_get_table("root", 1);
c->keytable->references++;
evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
evtimer_set(&c->click_timer, server_client_click_timer, c);
TAILQ_INSERT_TAIL(&clients, c, entry);
log_debug("new client %p", c);
}
/* Open client terminal if needed. */
int
server_client_open(struct client *c, char **cause)
{
if (c->flags & CLIENT_CONTROL)
return (0);
if (strcmp(c->ttyname, "/dev/tty") == 0) {
*cause = xstrdup("can't use /dev/tty");
return (-1);
}
if (!(c->flags & CLIENT_TERMINAL)) {
*cause = xstrdup("not a terminal");
return (-1);
}
if (tty_open(&c->tty, cause) != 0)
return (-1);
return (0);
}
/* Lost a client. */
void
server_client_lost(struct client *c)
{
struct message_entry *msg, *msg1;
c->flags |= CLIENT_DEAD;
server_client_clear_identify(c, NULL);
status_prompt_clear(c);
status_message_clear(c);
if (c->stdin_callback != NULL)
c->stdin_callback(c, 1, c->stdin_callback_data);
TAILQ_REMOVE(&clients, c, entry);
log_debug("lost client %p", c);
/*
* If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
* and tty_free might close an unrelated fd.
*/
if (c->flags & CLIENT_TERMINAL)
tty_free(&c->tty);
free(c->ttyname);
free(c->term);
evbuffer_free(c->stdin_data);
evbuffer_free(c->stdout_data);
if (c->stderr_data != c->stdout_data)
evbuffer_free(c->stderr_data);
if (event_initialized(&c->status_timer))
evtimer_del(&c->status_timer);
screen_free(&c->status);
free(c->title);
free((void *)c->cwd);
evtimer_del(&c->repeat_timer);
evtimer_del(&c->click_timer);
key_bindings_unref_table(c->keytable);
if (event_initialized(&c->identify_timer))
evtimer_del(&c->identify_timer);
free(c->message_string);
if (event_initialized(&c->message_timer))
evtimer_del(&c->message_timer);
TAILQ_FOREACH_SAFE(msg, &c->message_log, entry, msg1) {
free(msg->msg);
TAILQ_REMOVE(&c->message_log, msg, entry);
free(msg);
}
free(c->prompt_string);
free(c->prompt_buffer);
environ_free(c->environ);
proc_remove_peer(c->peer);
c->peer = NULL;
server_client_unref(c);
server_add_accept(0); /* may be more file descriptors now */
recalculate_sizes();
server_check_unattached();
server_update_socket();
}
/* Remove reference from a client. */
void
server_client_unref(struct client *c)
{
log_debug("unref client %p (%d references)", c, c->references);
c->references--;
if (c->references == 0)
event_once(-1, EV_TIMEOUT, server_client_free, c, NULL);
}
/* Free dead client. */
static void
server_client_free(__unused int fd, __unused short events, void *arg)
{
struct client *c = arg;
log_debug("free client %p (%d references)", c, c->references);
if (!TAILQ_EMPTY(&c->queue))
fatalx("queue not empty");
if (c->references == 0)
free(c);
}
/* Detach a client. */
void
server_client_detach(struct client *c, enum msgtype msgtype)
{
struct session *s = c->session;
if (s == NULL)
return;
notify_client("client-detached", c);
proc_send_s(c->peer, msgtype, s->name);
}
/* Execute command to replace a client. */
void
server_client_exec(struct client *c, const char *cmd)
{
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)
shell = options_get_string(s->options, "default-shell");
else
shell = options_get_string(global_s_options, "default-shell");
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);
}
/* Check for mouse keys. */
static key_code
server_client_check_mouse(struct client *c)
{
struct session *s = c->session;
struct mouse_event *m = &c->tty.mouse;
struct window *w;
struct window_pane *wp;
u_int x, y, b;
int flag;
key_code key;
struct timeval tv;
enum { NOTYPE, MOVE, DOWN, UP, DRAG, WHEEL, DOUBLE, TRIPLE } type;
enum { NOWHERE, PANE, STATUS, BORDER } where;
type = NOTYPE;
where = NOWHERE;
log_debug("mouse %02x at %u,%u (last %u,%u) (%d)", m->b, m->x, m->y,
m->lx, m->ly, c->tty.mouse_drag_flag);
/* What type of event is this? */
if ((m->sgr_type != ' ' &&
MOUSE_DRAG(m->sgr_b) &&
MOUSE_BUTTONS(m->sgr_b) == 3) ||
(m->sgr_type == ' ' &&
MOUSE_DRAG(m->b) &&
MOUSE_BUTTONS(m->b) == 3 &&
MOUSE_BUTTONS(m->lb) == 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)) {
type = DRAG;
if (c->tty.mouse_drag_flag) {
x = m->x, y = m->y, b = m->b;
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)) {
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)) {
type = UP;
x = m->x, y = m->y, b = m->lb;
log_debug("up at %u,%u", x, y);
} else {
if (c->flags & CLIENT_DOUBLECLICK) {
evtimer_del(&c->click_timer);
c->flags &= ~CLIENT_DOUBLECLICK;
if (m->b == c->click_button) {
type = DOUBLE;
x = m->x, y = m->y, b = m->b;
log_debug("double-click at %u,%u", x, y);
flag = CLIENT_TRIPLECLICK;
goto add_timer;
}
} else if (c->flags & CLIENT_TRIPLECLICK) {
evtimer_del(&c->click_timer);
c->flags &= ~CLIENT_TRIPLECLICK;
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;
}
}
type = DOWN;
x = m->x, y = m->y, b = m->b;
log_debug("down at %u,%u", x, y);
flag = CLIENT_DOUBLECLICK;
add_timer:
if (KEYC_CLICK_TIMEOUT != 0) {
c->flags |= flag;
c->click_button = m->b;
tv.tv_sec = KEYC_CLICK_TIMEOUT / 1000;
tv.tv_usec = (KEYC_CLICK_TIMEOUT % 1000) * 1000L;
evtimer_del(&c->click_timer);
evtimer_add(&c->click_timer, &tv);
}
}
have_event:
if (type == NOTYPE)
return (KEYC_UNKNOWN);
/* Always save the session. */
m->s = s->id;
/* Is this on the status line? */
m->statusat = status_at_line(c);
if (m->statusat != -1 && y == (u_int)m->statusat) {
w = status_get_window_at(c, x);
if (w == NULL)
return (KEYC_UNKNOWN);
m->w = w->id;
where = STATUS;
} else
m->w = -1;
/* Not on status line. Adjust position and check for border or pane. */
if (where == NOWHERE) {
if (m->statusat == 0 && y > 0)
y--;
else if (m->statusat > 0 && y >= (u_int)m->statusat)
y = m->statusat - 1;
TAILQ_FOREACH(wp, &s->curw->window->panes, entry) {
if ((wp->xoff + wp->sx == x &&
wp->yoff <= 1 + y &&
wp->yoff + wp->sy >= y) ||
(wp->yoff + wp->sy == y &&
wp->xoff <= 1 + x &&
wp->xoff + wp->sx >= x))
break;
}
if (wp != NULL)
where = BORDER;
else {
wp = window_get_active_at(s->curw->window, x, y);
if (wp != NULL) {
where = PANE;
log_debug("mouse at %u,%u is on pane %%%u",
x, y, wp->id);
}
}
if (where == NOWHERE)
return (KEYC_UNKNOWN);
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)
c->tty.mouse_drag_release(c, m);
c->tty.mouse_drag_update = NULL;
c->tty.mouse_drag_release = NULL;
/*
* 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 == BORDER)
key = KEYC_MOUSEDRAGEND1_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEDRAGEND2_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAGEND2_STATUS;
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 == BORDER)
key = KEYC_MOUSEDRAGEND3_BORDER;
break;
default:
key = KEYC_MOUSE;
break;
}
c->tty.mouse_drag_flag = 0;
return (key);
}
/* Convert to a key binding. */
key = KEYC_UNKNOWN;
switch (type) {
case NOTYPE:
break;
case MOVE:
if (where == PANE)
key = KEYC_MOUSEMOVE_PANE;
if (where == STATUS)
key = KEYC_MOUSEMOVE_STATUS;
if (where == BORDER)
key = KEYC_MOUSEMOVE_BORDER;
break;
case DRAG:
if (c->tty.mouse_drag_update != NULL)
key = KEYC_DRAGGING;
else {
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_MOUSEDRAG1_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAG1_STATUS;
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 == BORDER)
key = KEYC_MOUSEDRAG2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEDRAG3_PANE;
if (where == STATUS)
key = KEYC_MOUSEDRAG3_STATUS;
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) + 1;
break;
case WHEEL:
if (MOUSE_BUTTONS(b) == MOUSE_WHEEL_UP) {
if (where == PANE)
key = KEYC_WHEELUP_PANE;
if (where == STATUS)
key = KEYC_WHEELUP_STATUS;
if (where == BORDER)
key = KEYC_WHEELUP_BORDER;
} else {
if (where == PANE)
key = KEYC_WHEELDOWN_PANE;
if (where == STATUS)
key = KEYC_WHEELDOWN_STATUS;
if (where == BORDER)
key = KEYC_WHEELDOWN_BORDER;
}
break;
case UP:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_MOUSEUP1_PANE;
if (where == STATUS)
key = KEYC_MOUSEUP1_STATUS;
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 == BORDER)
key = KEYC_MOUSEUP2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEUP3_PANE;
if (where == STATUS)
key = KEYC_MOUSEUP3_STATUS;
if (where == BORDER)
key = KEYC_MOUSEUP3_BORDER;
break;
}
break;
case DOWN:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_MOUSEDOWN1_PANE;
if (where == STATUS)
key = KEYC_MOUSEDOWN1_STATUS;
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 == BORDER)
key = KEYC_MOUSEDOWN2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_MOUSEDOWN3_PANE;
if (where == STATUS)
key = KEYC_MOUSEDOWN3_STATUS;
if (where == BORDER)
key = KEYC_MOUSEDOWN3_BORDER;
break;
}
break;
case DOUBLE:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_DOUBLECLICK1_PANE;
if (where == STATUS)
key = KEYC_DOUBLECLICK1_STATUS;
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 == BORDER)
key = KEYC_DOUBLECLICK2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_DOUBLECLICK3_PANE;
if (where == STATUS)
key = KEYC_DOUBLECLICK3_STATUS;
if (where == BORDER)
key = KEYC_DOUBLECLICK3_BORDER;
break;
}
break;
case TRIPLE:
switch (MOUSE_BUTTONS(b)) {
case 0:
if (where == PANE)
key = KEYC_TRIPLECLICK1_PANE;
if (where == STATUS)
key = KEYC_TRIPLECLICK1_STATUS;
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 == BORDER)
key = KEYC_TRIPLECLICK2_BORDER;
break;
case 2:
if (where == PANE)
key = KEYC_TRIPLECLICK3_PANE;
if (where == STATUS)
key = KEYC_TRIPLECLICK3_STATUS;
if (where == BORDER)
key = KEYC_TRIPLECLICK3_BORDER;
break;
}
break;
}
if (key == KEYC_UNKNOWN)
return (KEYC_UNKNOWN);
/* Apply modifiers if any. */
if (b & MOUSE_MASK_META)
key |= KEYC_ESCAPE;
if (b & MOUSE_MASK_CTRL)
key |= KEYC_CTRL;
if (b & MOUSE_MASK_SHIFT)
key |= KEYC_SHIFT;
return (key);
}
/* Is this fast enough to probably be a paste? */
static int
server_client_assume_paste(struct session *s)
{
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);
if (tv.tv_sec == 0 && tv.tv_usec < t * 1000) {
log_debug("session %s pasting (flag %d)", s->name,
!!(s->flags & SESSION_PASTING));
if (s->flags & SESSION_PASTING)
return (1);
s->flags |= SESSION_PASTING;
return (0);
}
log_debug("session %s not pasting", s->name);
s->flags &= ~SESSION_PASTING;
return (0);
}
/* Handle data key input from client. */
void
server_client_handle_key(struct client *c, key_code key)
{
struct mouse_event *m = &c->tty.mouse;
struct session *s = c->session;
struct window *w;
struct window_pane *wp;
struct timeval tv;
const char *name;
struct key_table *table;
struct key_binding bd_find, *bd;
int xtimeout;
struct cmd_find_state fs;
/* Check the client is good to accept input. */
if (s == NULL || (c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
return;
w = s->curw->window;
/* Update the activity timer. */
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday failed");
session_update_activity(s, &c->activity_time);
/* Number keys jump to pane in identify mode. */
if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
if (c->flags & CLIENT_READONLY)
return;
window_unzoom(w);
wp = window_pane_at_index(w, key - '0');
if (wp != NULL && !window_pane_visible(wp))
wp = NULL;
server_client_clear_identify(c, wp);
return;
}
/* Handle status line. */
if (!(c->flags & CLIENT_READONLY)) {
status_message_clear(c);
server_client_clear_identify(c, NULL);
}
if (c->prompt_string != NULL) {
if (c->flags & CLIENT_READONLY)
return;
if (status_prompt_key(c, key) == 0)
return;
}
/* Check for mouse keys. */
m->valid = 0;
if (key == KEYC_MOUSE) {
if (c->flags & CLIENT_READONLY)
return;
key = server_client_check_mouse(c);
if (key == KEYC_UNKNOWN)
return;
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_DRAGGING) {
c->tty.mouse_drag_update(c, m);
return;
}
} else
m->valid = 0;
/* Find affected pane. */
if (KEYC_IS_MOUSE(key) && m->valid)
wp = cmd_mouse_pane(m, NULL, NULL);
else
wp = w->active;
/* Forward mouse keys if disabled. */
if (KEYC_IS_MOUSE(key) && !options_get_number(s->options, "mouse"))
goto forward;
/* Treat everything as a regular key when pasting is detected. */
if (!KEYC_IS_MOUSE(key) && server_client_assume_paste(s))
goto forward;
retry:
/*
* Work out the current key table. If the pane is in a mode, use
* the mode table instead of the default key table.
*/
name = NULL;
if (wp != NULL && wp->mode != NULL && wp->mode->key_table != NULL)
name = wp->mode->key_table(wp);
if (name == NULL || !server_client_is_default_key_table(c))
table = c->keytable;
else
table = key_bindings_get_table(name, 1);
if (wp == NULL)
log_debug("key table %s (no pane)", table->name);
else
log_debug("key table %s (pane %%%u)", table->name, wp->id);
/*
* The prefix always takes precedence and forces a switch to the prefix
* table, unless we are already there.
*/
if ((key == (key_code)options_get_number(s->options, "prefix") ||
key == (key_code)options_get_number(s->options, "prefix2")) &&
strcmp(table->name, "prefix") != 0) {
server_client_set_key_table(c, "prefix");
server_status_client(c);
return;
}
/* Try to see if there is a key binding in the current table. */
bd_find.key = key;
bd = RB_FIND(key_bindings, &table->key_bindings, &bd_find);
if (bd != NULL) {
/*
* 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_REPEAT) && !bd->can_repeat) {
server_client_set_key_table(c, NULL);
c->flags &= ~CLIENT_REPEAT;
server_status_client(c);
goto retry;
}
/*
* 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->can_repeat) {
c->flags |= CLIENT_REPEAT;
tv.tv_sec = xtimeout / 1000;
tv.tv_usec = (xtimeout % 1000) * 1000L;
evtimer_del(&c->repeat_timer);
evtimer_add(&c->repeat_timer, &tv);
} else {
c->flags &= ~CLIENT_REPEAT;
server_client_set_key_table(c, NULL);
}
server_status_client(c);
/* Find default state if the pane is known. */
cmd_find_clear_state(&fs, NULL, 0);
if (wp != NULL) {
fs.s = s;
fs.wl = fs.s->curw;
fs.w = fs.wl->window;
fs.wp = wp;
cmd_find_log_state(__func__, &fs);
if (!cmd_find_valid_state(&fs))
fatalx("invalid key state");
}
/* Dispatch the key binding. */
key_bindings_dispatch(bd, c, m, &fs);
key_bindings_unref_table(table);
return;
}
/*
* No match in this table. If repeating, switch the client back to the
* root table and try again.
*/
if (c->flags & CLIENT_REPEAT) {
server_client_set_key_table(c, NULL);
c->flags &= ~CLIENT_REPEAT;
server_status_client(c);
goto retry;
}
/* If no match and we're not in the root table, that's it. */
if (name == NULL && !server_client_is_default_key_table(c)) {
log_debug("no key in key table %s", table->name);
server_client_set_key_table(c, NULL);
server_status_client(c);
return;
}
forward:
if (c->flags & CLIENT_READONLY)
return;
if (wp != NULL)
window_pane_key(wp, c, s, key, m);
}
/* Client functions that need to happen every loop. */
void
server_client_loop(void)
{
struct client *c;
struct window *w;
struct window_pane *wp;
int focus;
TAILQ_FOREACH(c, &clients, entry) {
server_client_check_exit(c);
if (c->session != NULL) {
server_client_check_redraw(c);
server_client_reset_state(c);
}
}
/*
* Any windows will have been redrawn as part of clients, so clear
* their flags now. Also check pane focus and resize.
*/
focus = options_get_number(global_options, "focus-events");
RB_FOREACH(w, windows, &windows) {
w->flags &= ~WINDOW_REDRAW;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (wp->fd != -1) {
if (focus)
server_client_check_focus(wp);
server_client_check_resize(wp);
}
wp->flags &= ~PANE_REDRAW;
}
check_window_name(w);
}
}
/* Resize timer event. */
static void
server_client_resize_event(__unused int fd, __unused short events, void *data)
{
struct window_pane *wp = data;
struct winsize ws;
evtimer_del(&wp->resize_timer);
if (!(wp->flags & PANE_RESIZE))
return;
memset(&ws, 0, sizeof ws);
ws.ws_col = wp->sx;
ws.ws_row = wp->sy;
if (ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
fatal("ioctl failed");
wp->flags &= ~PANE_RESIZE;
}
/* Check if pane should be resized. */
static void
server_client_check_resize(struct window_pane *wp)
{
struct timeval tv = { .tv_usec = 250000 };
if (!(wp->flags & PANE_RESIZE))
return;
if (!event_initialized(&wp->resize_timer))
evtimer_set(&wp->resize_timer, server_client_resize_event, wp);
/*
* The first resize should happen immediately, so if the timer is not
* running, do it now.
*/
if (!evtimer_pending(&wp->resize_timer, NULL))
server_client_resize_event(-1, 0, wp);
/*
* If the pane is in the alternate screen, let the timer expire and
* resize to give the application a chance to redraw. If not, keep
* pushing the timer back.
*/
if (wp->saved_grid != NULL && evtimer_pending(&wp->resize_timer, NULL))
return;
evtimer_del(&wp->resize_timer);
evtimer_add(&wp->resize_timer, &tv);
}
/* Check whether pane should be focused. */
static void
server_client_check_focus(struct window_pane *wp)
{
struct client *c;
int push;
/* Do we need to push the focus state? */
push = wp->flags & PANE_FOCUSPUSH;
wp->flags &= ~PANE_FOCUSPUSH;
/* If we don't care about focus, forget it. */
if (!(wp->base.mode & MODE_FOCUSON))
return;
/* If we're not the active pane in our window, we're not focused. */
if (wp->window->active != wp)
goto not_focused;
/* If we're in a mode, we're not focused. */
if (wp->screen != &wp->base)
goto not_focused;
/*
* If our window is the current window in any focused clients with an
* attached session, we're focused.
*/
TAILQ_FOREACH(c, &clients, entry) {
if (c->session == NULL || !(c->flags & CLIENT_FOCUSED))
continue;
if (c->session->flags & SESSION_UNATTACHED)
continue;
if (c->session->curw->window == wp->window)
goto focused;
}
not_focused:
if (push || (wp->flags & PANE_FOCUSED))
bufferevent_write(wp->event, "\033[O", 3);
wp->flags &= ~PANE_FOCUSED;
return;
focused:
if (push || !(wp->flags & PANE_FOCUSED))
bufferevent_write(wp->event, "\033[I", 3);
wp->flags |= PANE_FOCUSED;
}
/*
* 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.
*/
static void
server_client_reset_state(struct client *c)
{
struct window *w = c->session->curw->window;
struct window_pane *wp = w->active, *loop;
struct screen *s = wp->screen;
struct options *oo = c->session->options;
int status, mode, o;
if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
return;
tty_region_off(&c->tty);
tty_margin_off(&c->tty);
status = options_get_number(oo, "status");
if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
tty_cursor(&c->tty, 0, 0);
else {
o = status && options_get_number(oo, "status-position") == 0;
tty_cursor(&c->tty, wp->xoff + s->cx, o + wp->yoff + s->cy);
}
/*
* Set mouse mode if requested. To support dragging, always use button
* mode.
*/
mode = s->mode;
if (options_get_number(oo, "mouse")) {
mode &= ~ALL_MOUSE_MODES;
TAILQ_FOREACH(loop, &w->panes, entry) {
if (loop->screen->mode & MODE_MOUSE_ALL)
mode |= MODE_MOUSE_ALL;
}
if (~mode & MODE_MOUSE_ALL)
mode |= MODE_MOUSE_BUTTON;
}
/* Clear bracketed paste mode if at the prompt. */
if (c->prompt_string != NULL)
mode &= ~MODE_BRACKETPASTE;
/* Set the terminal mode and reset attributes. */
tty_update_mode(&c->tty, mode, s);
tty_reset(&c->tty);
}
/* Repeat time callback. */
static void
server_client_repeat_timer(__unused int fd, __unused short events, void *data)
{
struct client *c = data;
if (c->flags & CLIENT_REPEAT) {
server_client_set_key_table(c, NULL);
c->flags &= ~CLIENT_REPEAT;
server_status_client(c);
}
}
/* Double-click callback. */
static void
server_client_click_timer(__unused int fd, __unused short events, void *data)
{
struct client *c = data;
c->flags &= ~(CLIENT_DOUBLECLICK|CLIENT_TRIPLECLICK);
}
/* Check if client should be exited. */
static void
server_client_check_exit(struct client *c)
{
if (!(c->flags & CLIENT_EXIT))
return;
if (EVBUFFER_LENGTH(c->stdin_data) != 0)
return;
if (EVBUFFER_LENGTH(c->stdout_data) != 0)
return;
if (EVBUFFER_LENGTH(c->stderr_data) != 0)
return;
proc_send(c->peer, MSG_EXIT, -1, &c->retval, sizeof c->retval);
c->flags &= ~CLIENT_EXIT;
}
/* Check for client redraws. */
static void
server_client_check_redraw(struct client *c)
{
struct session *s = c->session;
struct tty *tty = &c->tty;
struct window_pane *wp;
int flags, masked;
if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
return;
if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
if (options_get_number(s->options, "set-titles"))
server_client_set_title(c);
screen_redraw_update(c); /* will adjust flags */
}
flags = tty->flags & (TTY_FREEZE|TTY_NOCURSOR);
tty->flags = (tty->flags & ~TTY_FREEZE) | TTY_NOCURSOR;
if (c->flags & CLIENT_REDRAW) {
tty_update_mode(tty, tty->mode, NULL);
screen_redraw_screen(c, 1, 1, 1);
c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
} else if (c->flags & CLIENT_REDRAWWINDOW) {
tty_update_mode(tty, tty->mode, NULL);
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
screen_redraw_pane(c, wp);
c->flags &= ~CLIENT_REDRAWWINDOW;
} else {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
if (wp->flags & PANE_REDRAW) {
tty_update_mode(tty, tty->mode, NULL);
screen_redraw_pane(c, wp);
}
}
}
masked = c->flags & (CLIENT_BORDERS|CLIENT_STATUS);
if (masked != 0)
tty_update_mode(tty, tty->mode, NULL);
if (masked == CLIENT_BORDERS)
screen_redraw_screen(c, 0, 0, 1);
else if (masked == CLIENT_STATUS)
screen_redraw_screen(c, 0, 1, 0);
else if (masked != 0)
screen_redraw_screen(c, 0, 1, 1);
tty->flags = (tty->flags & ~(TTY_FREEZE|TTY_NOCURSOR)) | flags;
tty_update_mode(tty, tty->mode, NULL);
c->flags &= ~(CLIENT_REDRAW|CLIENT_BORDERS|CLIENT_STATUS|
CLIENT_STATUSFORCE);
}
/* Set client title. */
static void
server_client_set_title(struct client *c)
{
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(NULL, FORMAT_NONE, 0);
format_defaults(ft, c, NULL, NULL, NULL);
title = format_expand_time(ft, template, time(NULL));
if (c->title == NULL || strcmp(title, c->title) != 0) {
free(c->title);
c->title = xstrdup(title);
tty_set_title(&c->tty, c->title);
}
free(title);
format_free(ft);
}
/* Dispatch message from client. */
static void
server_client_dispatch(struct imsg *imsg, void *arg)
{
struct client *c = arg;
struct msg_stdin_data stdindata;
const char *data;
ssize_t datalen;
struct session *s;
if (c->flags & CLIENT_DEAD)
return;
if (imsg == NULL) {
server_client_lost(c);
return;
}
data = imsg->data;
datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
switch (imsg->hdr.type) {
case MSG_IDENTIFY_FLAGS:
case MSG_IDENTIFY_TERM:
case MSG_IDENTIFY_TTYNAME:
case MSG_IDENTIFY_CWD:
case MSG_IDENTIFY_STDIN:
case MSG_IDENTIFY_ENVIRON:
case MSG_IDENTIFY_CLIENTPID:
case MSG_IDENTIFY_DONE:
server_client_dispatch_identify(c, imsg);
break;
case MSG_COMMAND:
server_client_dispatch_command(c, imsg);
break;
case MSG_STDIN:
if (datalen != sizeof stdindata)
fatalx("bad MSG_STDIN size");
memcpy(&stdindata, data, sizeof stdindata);
if (c->stdin_callback == NULL)
break;
if (stdindata.size <= 0)
c->stdin_closed = 1;
else {
evbuffer_add(c->stdin_data, stdindata.data,
stdindata.size);
}
c->stdin_callback(c, c->stdin_closed,
c->stdin_callback_data);
break;
case MSG_RESIZE:
if (datalen != 0)
fatalx("bad MSG_RESIZE size");
if (c->flags & CLIENT_CONTROL)
break;
if (tty_resize(&c->tty)) {
recalculate_sizes();
server_redraw_client(c);
}
if (c->session != NULL)
notify_client("client-resized", c);
break;
case MSG_EXITING:
if (datalen != 0)
fatalx("bad MSG_EXITING size");
c->session = NULL;
tty_close(&c->tty);
proc_send(c->peer, MSG_EXITED, -1, NULL, 0);
break;
case MSG_WAKEUP:
case MSG_UNLOCK:
if (datalen != 0)
fatalx("bad MSG_WAKEUP size");
if (!(c->flags & CLIENT_SUSPENDED))
break;
c->flags &= ~CLIENT_SUSPENDED;
if (c->tty.fd == -1) /* exited in the meantime */
break;
s = c->session;
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday failed");
tty_start_tty(&c->tty);
server_redraw_client(c);
recalculate_sizes();
if (s != NULL)
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;
}
}
/* Callback when command is done. */
static enum cmd_retval
server_client_command_done(struct cmdq_item *item, __unused void *data)
{
struct client *c = item->client;
if (~c->flags & CLIENT_ATTACHED)
c->flags |= CLIENT_EXIT;
return (CMD_RETURN_NORMAL);
}
/* Show an error message. */
static enum cmd_retval
server_client_command_error(struct cmdq_item *item, void *data)
{
char *error = data;
cmdq_error(item, "%s", error);
free(error);
return (CMD_RETURN_NORMAL);
}
/* Handle command message. */
static void
server_client_dispatch_command(struct client *c, struct imsg *imsg)
{
struct msg_command_data data;
char *buf;
size_t len;
struct cmd_list *cmdlist = NULL;
int argc;
char **argv, *cause;
if (imsg->hdr.len - IMSG_HEADER_SIZE < 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_SIZE - 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");
}
if ((cmdlist = cmd_list_parse(argc, argv, NULL, 0, &cause)) == NULL) {
cmd_free_argv(argc, argv);
goto error;
}
cmd_free_argv(argc, argv);
cmdq_append(c, cmdq_get_command(cmdlist, NULL, NULL, 0));
cmdq_append(c, cmdq_get_callback(server_client_command_done, NULL));
cmd_list_free(cmdlist);
return;
error:
cmdq_append(c, cmdq_get_callback(server_client_command_error, cause));
if (cmdlist != NULL)
cmd_list_free(cmdlist);
c->flags |= CLIENT_EXIT;
}
/* Handle identify message. */
static void
server_client_dispatch_identify(struct client *c, struct imsg *imsg)
{
const char *data, *home;
size_t datalen;
int flags;
if (c->flags & CLIENT_IDENTIFIED)
fatalx("out-of-order identify message");
data = imsg->data;
datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
switch (imsg->hdr.type) {
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_TERM:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_TERM string");
c->term = xstrdup(data);
log_debug("client %p IDENTIFY_TERM %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_OK) == 0)
c->cwd = xstrdup(data);
else if ((home = find_home()) != NULL)
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_ENVIRON:
if (datalen == 0 || data[datalen - 1] != '\0')
fatalx("bad MSG_IDENTIFY_ENVIRON string");
if (strchr(data, '=') != NULL)
environ_put(c->environ, data);
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_IDENTIFIED;
if (c->flags & CLIENT_CONTROL) {
c->stdin_callback = control_callback;
evbuffer_free(c->stderr_data);
c->stderr_data = c->stdout_data;
if (c->flags & CLIENT_CONTROLCONTROL)
evbuffer_add_printf(c->stdout_data, "\033P1000p");
proc_send(c->peer, MSG_STDIN, -1, NULL, 0);
c->tty.fd = -1;
close(c->fd);
c->fd = -1;
return;
}
if (c->fd == -1)
return;
if (tty_init(&c->tty, c, c->fd, c->term) != 0) {
close(c->fd);
c->fd = -1;
return;
}
if (c->flags & CLIENT_UTF8)
c->tty.flags |= TTY_UTF8;
if (c->flags & CLIENT_256COLOURS)
c->tty.term_flags |= TERM_256COLOURS;
tty_resize(&c->tty);
if (!(c->flags & CLIENT_CONTROL))
c->flags |= CLIENT_TERMINAL;
}
/* Handle shell message. */
static void
server_client_dispatch_shell(struct client *c)
{
const char *shell;
shell = options_get_string(global_s_options, "default-shell");
if (*shell == '\0' || areshell(shell))
shell = _PATH_BSHELL;
proc_send_s(c->peer, MSG_SHELL, shell);
proc_kill_peer(c->peer);
}
/* Event callback to push more stdout data if any left. */
static void
server_client_stdout_cb(__unused int fd, __unused short events, void *arg)
{
struct client *c = arg;
if (~c->flags & CLIENT_DEAD)
server_client_push_stdout(c);
server_client_unref(c);
}
/* Push stdout to client if possible. */
void
server_client_push_stdout(struct client *c)
{
struct msg_stdout_data data;
size_t sent, left;
left = EVBUFFER_LENGTH(c->stdout_data);
while (left != 0) {
sent = left;
if (sent > sizeof data.data)
sent = sizeof data.data;
memcpy(data.data, EVBUFFER_DATA(c->stdout_data), sent);
data.size = sent;
if (proc_send(c->peer, MSG_STDOUT, -1, &data, sizeof data) != 0)
break;
evbuffer_drain(c->stdout_data, sent);
left = EVBUFFER_LENGTH(c->stdout_data);
log_debug("%s: client %p, sent %zu, left %zu", __func__, c,
sent, left);
}
if (left != 0) {
c->references++;
event_once(-1, EV_TIMEOUT, server_client_stdout_cb, c, NULL);
log_debug("%s: client %p, queued", __func__, c);
}
}
/* Event callback to push more stderr data if any left. */
static void
server_client_stderr_cb(__unused int fd, __unused short events, void *arg)
{
struct client *c = arg;
if (~c->flags & CLIENT_DEAD)
server_client_push_stderr(c);
server_client_unref(c);
}
/* Push stderr to client if possible. */
void
server_client_push_stderr(struct client *c)
{
struct msg_stderr_data data;
size_t sent, left;
if (c->stderr_data == c->stdout_data) {
server_client_push_stdout(c);
return;
}
left = EVBUFFER_LENGTH(c->stderr_data);
while (left != 0) {
sent = left;
if (sent > sizeof data.data)
sent = sizeof data.data;
memcpy(data.data, EVBUFFER_DATA(c->stderr_data), sent);
data.size = sent;
if (proc_send(c->peer, MSG_STDERR, -1, &data, sizeof data) != 0)
break;
evbuffer_drain(c->stderr_data, sent);
left = EVBUFFER_LENGTH(c->stderr_data);
log_debug("%s: client %p, sent %zu, left %zu", __func__, c,
sent, left);
}
if (left != 0) {
c->references++;
event_once(-1, EV_TIMEOUT, server_client_stderr_cb, c, NULL);
log_debug("%s: client %p, queued", __func__, c);
}
}
/* Add to client message log. */
void
server_client_add_message(struct client *c, const char *fmt, ...)
{
struct message_entry *msg, *msg1;
char *s;
va_list ap;
u_int limit;
va_start(ap, fmt);
xvasprintf(&s, fmt, ap);
va_end(ap);
log_debug("%s: message %s", c->tty.path, s);
msg = xcalloc(1, sizeof *msg);
msg->msg_time = time(NULL);
msg->msg_num = c->message_next++;
msg->msg = s;
TAILQ_INSERT_TAIL(&c->message_log, msg, entry);
limit = options_get_number(global_options, "message-limit");
TAILQ_FOREACH_SAFE(msg, &c->message_log, entry, msg1) {
if (msg->msg_num + limit >= c->message_next)
break;
free(msg->msg);
TAILQ_REMOVE(&c->message_log, msg, entry);
free(msg);
}
}
/* Get client working directory. */
const char *
server_client_get_cwd(struct client *c)
{
struct session *s;
if (c != NULL && c->session == NULL && c->cwd != NULL)
return (c->cwd);
if (c != NULL && (s = c->session) != NULL && s->cwd != NULL)
return (s->cwd);
return (".");
}
/* Resolve an absolute path or relative to client working directory. */
char *
server_client_get_path(struct client *c, const char *file)
{
char *path, resolved[PATH_MAX];
if (*file == '/')
path = xstrdup(file);
else
xasprintf(&path, "%s/%s", server_client_get_cwd(c), file);
if (realpath(path, resolved) == NULL)
return (path);
free(path);
return (xstrdup(resolved));
}
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