/* $OpenBSD: server-client.c,v 1.244 2017/09/06 07:12:41 nicm Exp $ */ /* * Copyright (c) 2009 Nicholas Marriott * * 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 #include #include #include #include #include #include #include #include #include #include #include #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 *); /* Number of attached clients. */ u_int server_client_how_many(void) { struct client *c; u_int n; n = 0; TAILQ_FOREACH(c, &clients, entry) { if (c->session != NULL && (~c->flags & CLIENT_DETACHING)) n++; } return (n); } /* Identify 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, u_int delay) { struct timeval tv; 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); if (delay != 0) 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; 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->ttyname) == 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 table the default key table? */ static int server_client_is_default_key_table(struct client *c, struct key_table *table) { return (strcmp(table->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); if (c->old_status != NULL) { screen_free(c->old_status); free(c->old_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); format_lost_client(c); 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((void *)c->name); free(c); } } /* Suspend a client. */ void server_client_suspend(struct client *c) { struct session *s = c->session; if (s == NULL || (c->flags & CLIENT_DETACHING)) return; tty_stop_tty(&c->tty); c->flags |= CLIENT_SUSPENDED; proc_send(c->peer, MSG_SUSPEND, -1, NULL, 0); } /* Detach a client. */ void server_client_detach(struct client *c, enum msgtype msgtype) { struct session *s = c->session; if (s == NULL || (c->flags & CLIENT_DETACHING)) return; c->flags |= CLIENT_DETACHING; notify_client("client-detached", c); proc_send(c->peer, msgtype, -1, s->name, strlen(s->name) + 1); } /* 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; struct key_table *table, *first; struct key_binding bd_find, *bd; int xtimeout, flags; struct cmd_find_state fs; key_code key0; /* 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) || cmd_find_from_mouse(&fs, m, 0) != 0) cmd_find_from_session(&fs, s, 0); wp = fs.wp; /* 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; /* * 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 && wp->mode != NULL && wp->mode->key_table != NULL) table = key_bindings_get_table(wp->mode->key_table(wp), 1); else table = c->keytable; first = table; /* * The prefix always takes precedence and forces a switch to the prefix * table, unless we are already there. */ key0 = (key & ~KEYC_XTERM); 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); return; } flags = c->flags; retry: /* Log key table. */ if (wp == NULL) 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_REPEAT) log_debug("currently repeating"); /* Try to see if there is a key binding in the current table. */ bd_find.key = key0; 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->flags & KEY_BINDING_REPEAT)) { server_client_set_key_table(c, NULL); c->flags &= ~CLIENT_REPEAT; server_status_client(c); table = c->keytable; goto retry; } 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_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); /* Execute the key binding. */ key_bindings_dispatch(bd, NULL, c, m, &fs); key_bindings_unref_table(table); return; } /* * 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_REPEAT)) { server_client_set_key_table(c, NULL); c->flags &= ~CLIENT_REPEAT; server_status_client(c); table = c->keytable; goto retry; } /* * 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_REPEAT)) { 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) { 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); } } /* Check if we need to force a resize. */ static int server_client_resize_force(struct window_pane *wp) { struct timeval tv = { .tv_usec = 100000 }; struct winsize ws; /* * If we are resizing to the same size as when we entered the loop * (that is, to the same size the application currently thinks it is), * tmux may have gone through several resizes internally and thrown * away parts of the screen. So we need the application to actually * redraw even though its final size has not changed. */ if (wp->flags & PANE_RESIZEFORCE) { wp->flags &= ~PANE_RESIZEFORCE; return (0); } if (wp->sx != wp->osx || wp->sy != wp->osy || wp->sx <= 1 || wp->sy <= 1) return (0); memset(&ws, 0, sizeof ws); ws.ws_col = wp->sx; ws.ws_row = wp->sy - 1; if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1) fatal("ioctl failed"); log_debug("%s: %%%u forcing resize", __func__, wp->id); evtimer_add(&wp->resize_timer, &tv); wp->flags |= PANE_RESIZEFORCE; return (1); } /* 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; if (server_client_resize_force(wp)) return; memset(&ws, 0, sizeof ws); ws.ws_col = wp->sx; ws.ws_row = wp->sy; if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1) fatal("ioctl failed"); log_debug("%s: %%%u resize to %u,%u", __func__, wp->id, wp->sx, wp->sy); wp->flags &= ~PANE_RESIZE; wp->osx = wp->sx; wp->osy = wp->sy; } /* 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; log_debug("%s: %%%u resize to %u,%u", __func__, wp->id, wp->sx, wp->sy); 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; } /* Redraw timer callback. */ static void server_client_redraw_timer(__unused int fd, __unused short events, __unused void* data) { log_debug("redraw timer fired"); } /* 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 needed, flags, masked; struct timeval tv = { .tv_usec = 1000 }; static struct event ev; size_t left; if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED)) return; /* * 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_REDRAW) needed = 1; else { TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) { if (wp->flags & PANE_REDRAW) { needed = 1; break; } } } if (needed && (left = EVBUFFER_LENGTH(tty->out)) != 0) { log_debug("%s: redraw deferred (%zu left)", c->name, left); if (!evtimer_initialized(&ev)) evtimer_set(&ev, server_client_redraw_timer, NULL); if (!evtimer_pending(&ev, NULL)) { log_debug("redraw timer started"); evtimer_add(&ev, &tv); } /* * We may have got here for a single pane redraw, but force a * full redraw next time in case other panes have been updated. */ c->flags |= CLIENT_REDRAW; return; } else if (needed) log_debug("%s: redraw needed", c->name); 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_BLOCK|TTY_FREEZE|TTY_NOCURSOR); tty->flags = (tty->flags & ~(TTY_BLOCK|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 { 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); 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); log_debug("%s: redraw added %zu bytes", c->name, c->redraw); } } /* 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(c, 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; 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; char *name; 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->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_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(c->peer, MSG_SHELL, -1, shell, strlen(shell) + 1); 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("message %s (client %p)", s, c); 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)); }