mirror of
https://github.com/tmux/tmux.git
synced 2024-12-14 10:58:48 +00:00
899e629bf0
add a link of winlinks to each window and a pointer to the session to each winlink. Also rewrite the alerts processing to return to the old behaviour (alert in any window sets the flag on any winlink).
761 lines
17 KiB
C
761 lines
17 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/time.h>
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#include <paths.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include "tmux.h"
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struct sessions sessions;
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static u_int next_session_id;
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struct session_groups session_groups;
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static void session_free(int, short, void *);
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static void session_lock_timer(int, short, void *);
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static struct winlink *session_next_alert(struct winlink *);
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static struct winlink *session_previous_alert(struct winlink *);
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static void session_group_remove(struct session *);
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static u_int session_group_count(struct session_group *);
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static void session_group_synchronize1(struct session *, struct session *);
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RB_GENERATE(sessions, session, entry, session_cmp);
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int
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session_cmp(struct session *s1, struct session *s2)
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{
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return (strcmp(s1->name, s2->name));
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}
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/*
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* Find if session is still alive. This is true if it is still on the global
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* sessions list.
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*/
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int
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session_alive(struct session *s)
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{
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struct session *s_loop;
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RB_FOREACH(s_loop, sessions, &sessions) {
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if (s_loop == s)
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return (1);
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}
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return (0);
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}
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/* Find session by name. */
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struct session *
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session_find(const char *name)
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{
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struct session s;
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s.name = (char *) name;
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return (RB_FIND(sessions, &sessions, &s));
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}
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/* Find session by id parsed from a string. */
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struct session *
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session_find_by_id_str(const char *s)
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{
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const char *errstr;
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u_int id;
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if (*s != '$')
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return (NULL);
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id = strtonum(s + 1, 0, UINT_MAX, &errstr);
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if (errstr != NULL)
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return (NULL);
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return (session_find_by_id(id));
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}
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/* Find session by id. */
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struct session *
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session_find_by_id(u_int id)
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{
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struct session *s;
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RB_FOREACH(s, sessions, &sessions) {
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if (s->id == id)
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return (s);
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}
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return (NULL);
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}
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/* Create a new session. */
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struct session *
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session_create(const char *name, int argc, char **argv, const char *path,
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const char *cwd, struct environ *env, struct termios *tio, int idx,
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u_int sx, u_int sy, char **cause)
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{
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struct session *s;
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struct winlink *wl;
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s = xcalloc(1, sizeof *s);
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s->references = 1;
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s->flags = 0;
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s->cwd = xstrdup(cwd);
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s->curw = NULL;
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TAILQ_INIT(&s->lastw);
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RB_INIT(&s->windows);
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s->environ = environ_create();
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if (env != NULL)
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environ_copy(env, s->environ);
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s->options = options_create(global_s_options);
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s->hooks = hooks_create(global_hooks);
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s->tio = NULL;
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if (tio != NULL) {
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s->tio = xmalloc(sizeof *s->tio);
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memcpy(s->tio, tio, sizeof *s->tio);
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}
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s->sx = sx;
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s->sy = sy;
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if (name != NULL) {
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s->name = xstrdup(name);
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s->id = next_session_id++;
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} else {
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s->name = NULL;
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do {
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s->id = next_session_id++;
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free(s->name);
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xasprintf(&s->name, "%u", s->id);
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} while (RB_FIND(sessions, &sessions, s) != NULL);
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}
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RB_INSERT(sessions, &sessions, s);
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log_debug("new session %s $%u", s->name, s->id);
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if (gettimeofday(&s->creation_time, NULL) != 0)
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fatal("gettimeofday failed");
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session_update_activity(s, &s->creation_time);
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if (argc >= 0) {
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wl = session_new(s, NULL, argc, argv, path, cwd, idx, cause);
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if (wl == NULL) {
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session_destroy(s);
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return (NULL);
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}
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session_select(s, RB_ROOT(&s->windows)->idx);
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}
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log_debug("session %s created", s->name);
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return (s);
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}
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/* Remove a reference from a session. */
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void
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session_unref(struct session *s)
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{
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log_debug("session %s has %d references", s->name, s->references);
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s->references--;
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if (s->references == 0)
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event_once(-1, EV_TIMEOUT, session_free, s, NULL);
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}
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/* Free session. */
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static void
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session_free(__unused int fd, __unused short events, void *arg)
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{
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struct session *s = arg;
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log_debug("session %s freed (%d references)", s->name, s->references);
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if (s->references == 0) {
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environ_free(s->environ);
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options_free(s->options);
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hooks_free(s->hooks);
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free(s->name);
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free(s);
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}
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}
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/* Destroy a session. */
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void
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session_destroy(struct session *s)
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{
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struct winlink *wl;
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log_debug("session %s destroyed", s->name);
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s->curw = NULL;
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RB_REMOVE(sessions, &sessions, s);
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notify_session("session-closed", s);
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free(s->tio);
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if (event_initialized(&s->lock_timer))
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event_del(&s->lock_timer);
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session_group_remove(s);
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while (!TAILQ_EMPTY(&s->lastw))
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winlink_stack_remove(&s->lastw, TAILQ_FIRST(&s->lastw));
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while (!RB_EMPTY(&s->windows)) {
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wl = RB_ROOT(&s->windows);
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notify_session_window("window-unlinked", s, wl->window);
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winlink_remove(&s->windows, wl);
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}
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free((void *)s->cwd);
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session_unref(s);
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}
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/* Check a session name is valid: not empty and no colons or periods. */
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int
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session_check_name(const char *name)
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{
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return (*name != '\0' && name[strcspn(name, ":.")] == '\0');
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}
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/* Lock session if it has timed out. */
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static void
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session_lock_timer(__unused int fd, __unused short events, void *arg)
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{
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struct session *s = arg;
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if (s->flags & SESSION_UNATTACHED)
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return;
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log_debug("session %s locked, activity time %lld", s->name,
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(long long)s->activity_time.tv_sec);
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server_lock_session(s);
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recalculate_sizes();
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}
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/* Update activity time. */
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void
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session_update_activity(struct session *s, struct timeval *from)
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{
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struct timeval *last = &s->last_activity_time;
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struct timeval tv;
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memcpy(last, &s->activity_time, sizeof *last);
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if (from == NULL)
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gettimeofday(&s->activity_time, NULL);
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else
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memcpy(&s->activity_time, from, sizeof s->activity_time);
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log_debug("session %s activity %lld.%06d (last %lld.%06d)", s->name,
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(long long)s->activity_time.tv_sec, (int)s->activity_time.tv_usec,
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(long long)last->tv_sec, (int)last->tv_usec);
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if (evtimer_initialized(&s->lock_timer))
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evtimer_del(&s->lock_timer);
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else
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evtimer_set(&s->lock_timer, session_lock_timer, s);
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if (~s->flags & SESSION_UNATTACHED) {
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timerclear(&tv);
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tv.tv_sec = options_get_number(s->options, "lock-after-time");
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if (tv.tv_sec != 0)
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evtimer_add(&s->lock_timer, &tv);
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}
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}
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/* Find the next usable session. */
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struct session *
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session_next_session(struct session *s)
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{
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struct session *s2;
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if (RB_EMPTY(&sessions) || !session_alive(s))
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return (NULL);
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s2 = RB_NEXT(sessions, &sessions, s);
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if (s2 == NULL)
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s2 = RB_MIN(sessions, &sessions);
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if (s2 == s)
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return (NULL);
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return (s2);
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}
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/* Find the previous usable session. */
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struct session *
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session_previous_session(struct session *s)
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{
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struct session *s2;
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if (RB_EMPTY(&sessions) || !session_alive(s))
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return (NULL);
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s2 = RB_PREV(sessions, &sessions, s);
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if (s2 == NULL)
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s2 = RB_MAX(sessions, &sessions);
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if (s2 == s)
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return (NULL);
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return (s2);
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}
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/* Create a new window on a session. */
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struct winlink *
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session_new(struct session *s, const char *name, int argc, char **argv,
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const char *path, const char *cwd, int idx, char **cause)
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{
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struct window *w;
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struct winlink *wl;
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struct environ *env;
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const char *shell;
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u_int hlimit;
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if ((wl = winlink_add(&s->windows, idx)) == NULL) {
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xasprintf(cause, "index in use: %d", idx);
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return (NULL);
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}
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wl->session = s;
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env = environ_create();
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environ_copy(global_environ, env);
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environ_copy(s->environ, env);
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server_fill_environ(s, env);
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shell = options_get_string(s->options, "default-shell");
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if (*shell == '\0' || areshell(shell))
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shell = _PATH_BSHELL;
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hlimit = options_get_number(s->options, "history-limit");
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w = window_create_spawn(name, argc, argv, path, shell, cwd, env, s->tio,
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s->sx, s->sy, hlimit, cause);
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if (w == NULL) {
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winlink_remove(&s->windows, wl);
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environ_free(env);
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return (NULL);
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}
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winlink_set_window(wl, w);
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notify_session_window("window-linked", s, w);
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environ_free(env);
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session_group_synchronize_from(s);
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return (wl);
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}
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/* Attach a window to a session. */
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struct winlink *
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session_attach(struct session *s, struct window *w, int idx, char **cause)
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{
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struct winlink *wl;
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if ((wl = winlink_add(&s->windows, idx)) == NULL) {
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xasprintf(cause, "index in use: %d", idx);
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return (NULL);
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}
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wl->session = s;
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winlink_set_window(wl, w);
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notify_session_window("window-linked", s, w);
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session_group_synchronize_from(s);
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return (wl);
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}
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/* Detach a window from a session. */
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int
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session_detach(struct session *s, struct winlink *wl)
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{
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if (s->curw == wl &&
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session_last(s) != 0 &&
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session_previous(s, 0) != 0)
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session_next(s, 0);
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wl->flags &= ~WINLINK_ALERTFLAGS;
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notify_session_window("window-unlinked", s, wl->window);
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winlink_stack_remove(&s->lastw, wl);
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winlink_remove(&s->windows, wl);
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session_group_synchronize_from(s);
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if (RB_EMPTY(&s->windows)) {
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session_destroy(s);
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return (1);
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}
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return (0);
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}
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/* Return if session has window. */
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int
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session_has(struct session *s, struct window *w)
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{
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struct winlink *wl;
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TAILQ_FOREACH(wl, &w->winlinks, wentry) {
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if (wl->session == s)
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return (1);
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}
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return (0);
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}
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/*
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* Return 1 if a window is linked outside this session (not including session
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* groups). The window must be in this session!
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*/
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int
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session_is_linked(struct session *s, struct window *w)
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{
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struct session_group *sg;
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if ((sg = session_group_find(s)) != NULL)
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return (w->references != session_group_count(sg));
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return (w->references != 1);
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}
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static struct winlink *
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session_next_alert(struct winlink *wl)
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{
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while (wl != NULL) {
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if (wl->flags & WINLINK_ALERTFLAGS)
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break;
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wl = winlink_next(wl);
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}
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return (wl);
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}
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/* Move session to next window. */
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int
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session_next(struct session *s, int alert)
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{
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struct winlink *wl;
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if (s->curw == NULL)
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return (-1);
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wl = winlink_next(s->curw);
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if (alert)
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wl = session_next_alert(wl);
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if (wl == NULL) {
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wl = RB_MIN(winlinks, &s->windows);
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if (alert && ((wl = session_next_alert(wl)) == NULL))
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return (-1);
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}
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return (session_set_current(s, wl));
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}
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static struct winlink *
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session_previous_alert(struct winlink *wl)
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{
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while (wl != NULL) {
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if (wl->flags & WINLINK_ALERTFLAGS)
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break;
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wl = winlink_previous(wl);
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}
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return (wl);
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}
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/* Move session to previous window. */
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int
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session_previous(struct session *s, int alert)
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{
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struct winlink *wl;
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if (s->curw == NULL)
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return (-1);
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wl = winlink_previous(s->curw);
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if (alert)
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wl = session_previous_alert(wl);
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if (wl == NULL) {
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wl = RB_MAX(winlinks, &s->windows);
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if (alert && (wl = session_previous_alert(wl)) == NULL)
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return (-1);
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}
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return (session_set_current(s, wl));
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}
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/* Move session to specific window. */
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int
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session_select(struct session *s, int idx)
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{
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struct winlink *wl;
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wl = winlink_find_by_index(&s->windows, idx);
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return (session_set_current(s, wl));
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}
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/* Move session to last used window. */
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int
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session_last(struct session *s)
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{
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struct winlink *wl;
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wl = TAILQ_FIRST(&s->lastw);
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if (wl == NULL)
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return (-1);
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if (wl == s->curw)
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return (1);
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return (session_set_current(s, wl));
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}
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/* Set current winlink to wl .*/
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int
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session_set_current(struct session *s, struct winlink *wl)
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{
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if (wl == NULL)
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return (-1);
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if (wl == s->curw)
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return (1);
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winlink_stack_remove(&s->lastw, wl);
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winlink_stack_push(&s->lastw, s->curw);
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s->curw = wl;
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winlink_clear_flags(wl);
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window_update_activity(wl->window);
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return (0);
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}
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/* Find the session group containing a session. */
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struct session_group *
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session_group_find(struct session *target)
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{
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struct session_group *sg;
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struct session *s;
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TAILQ_FOREACH(sg, &session_groups, entry) {
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TAILQ_FOREACH(s, &sg->sessions, gentry) {
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if (s == target)
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return (sg);
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}
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}
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return (NULL);
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}
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/* Find session group index. */
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u_int
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session_group_index(struct session_group *sg)
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{
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struct session_group *sg2;
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|
u_int i;
|
|
|
|
i = 0;
|
|
TAILQ_FOREACH(sg2, &session_groups, entry) {
|
|
if (sg == sg2)
|
|
return (i);
|
|
i++;
|
|
}
|
|
|
|
fatalx("session group not found");
|
|
}
|
|
|
|
/*
|
|
* Add a session to the session group containing target, creating it if
|
|
* necessary.
|
|
*/
|
|
void
|
|
session_group_add(struct session *target, struct session *s)
|
|
{
|
|
struct session_group *sg;
|
|
|
|
if ((sg = session_group_find(target)) == NULL) {
|
|
sg = xmalloc(sizeof *sg);
|
|
TAILQ_INSERT_TAIL(&session_groups, sg, entry);
|
|
TAILQ_INIT(&sg->sessions);
|
|
TAILQ_INSERT_TAIL(&sg->sessions, target, gentry);
|
|
}
|
|
TAILQ_INSERT_TAIL(&sg->sessions, s, gentry);
|
|
}
|
|
|
|
/* Remove a session from its group and destroy the group if empty. */
|
|
static void
|
|
session_group_remove(struct session *s)
|
|
{
|
|
struct session_group *sg;
|
|
|
|
if ((sg = session_group_find(s)) == NULL)
|
|
return;
|
|
TAILQ_REMOVE(&sg->sessions, s, gentry);
|
|
if (TAILQ_NEXT(TAILQ_FIRST(&sg->sessions), gentry) == NULL)
|
|
TAILQ_REMOVE(&sg->sessions, TAILQ_FIRST(&sg->sessions), gentry);
|
|
if (TAILQ_EMPTY(&sg->sessions)) {
|
|
TAILQ_REMOVE(&session_groups, sg, entry);
|
|
free(sg);
|
|
}
|
|
}
|
|
|
|
/* Count number of sessions in session group. */
|
|
static u_int
|
|
session_group_count(struct session_group *sg)
|
|
{
|
|
struct session *s;
|
|
u_int n;
|
|
|
|
n = 0;
|
|
TAILQ_FOREACH(s, &sg->sessions, gentry)
|
|
n++;
|
|
return (n);
|
|
}
|
|
|
|
/* Synchronize a session to its session group. */
|
|
void
|
|
session_group_synchronize_to(struct session *s)
|
|
{
|
|
struct session_group *sg;
|
|
struct session *target;
|
|
|
|
if ((sg = session_group_find(s)) == NULL)
|
|
return;
|
|
|
|
target = NULL;
|
|
TAILQ_FOREACH(target, &sg->sessions, gentry) {
|
|
if (target != s)
|
|
break;
|
|
}
|
|
session_group_synchronize1(target, s);
|
|
}
|
|
|
|
/* Synchronize a session group to a session. */
|
|
void
|
|
session_group_synchronize_from(struct session *target)
|
|
{
|
|
struct session_group *sg;
|
|
struct session *s;
|
|
|
|
if ((sg = session_group_find(target)) == NULL)
|
|
return;
|
|
|
|
TAILQ_FOREACH(s, &sg->sessions, gentry) {
|
|
if (s != target)
|
|
session_group_synchronize1(target, s);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Synchronize a session with a target session. This means destroying all
|
|
* winlinks then recreating them, then updating the current window, last window
|
|
* stack and alerts.
|
|
*/
|
|
static void
|
|
session_group_synchronize1(struct session *target, struct session *s)
|
|
{
|
|
struct winlinks old_windows, *ww;
|
|
struct winlink_stack old_lastw;
|
|
struct winlink *wl, *wl2;
|
|
|
|
/* Don't do anything if the session is empty (it'll be destroyed). */
|
|
ww = &target->windows;
|
|
if (RB_EMPTY(ww))
|
|
return;
|
|
|
|
/* If the current window has vanished, move to the next now. */
|
|
if (s->curw != NULL &&
|
|
winlink_find_by_index(ww, s->curw->idx) == NULL &&
|
|
session_last(s) != 0 && session_previous(s, 0) != 0)
|
|
session_next(s, 0);
|
|
|
|
/* Save the old pointer and reset it. */
|
|
memcpy(&old_windows, &s->windows, sizeof old_windows);
|
|
RB_INIT(&s->windows);
|
|
|
|
/* Link all the windows from the target. */
|
|
RB_FOREACH(wl, winlinks, ww) {
|
|
wl2 = winlink_add(&s->windows, wl->idx);
|
|
wl2->session = s;
|
|
winlink_set_window(wl2, wl->window);
|
|
notify_session_window("window-linked", s, wl2->window);
|
|
wl2->flags |= wl->flags & WINLINK_ALERTFLAGS;
|
|
}
|
|
|
|
/* Fix up the current window. */
|
|
if (s->curw != NULL)
|
|
s->curw = winlink_find_by_index(&s->windows, s->curw->idx);
|
|
else
|
|
s->curw = winlink_find_by_index(&s->windows, target->curw->idx);
|
|
|
|
/* Fix up the last window stack. */
|
|
memcpy(&old_lastw, &s->lastw, sizeof old_lastw);
|
|
TAILQ_INIT(&s->lastw);
|
|
TAILQ_FOREACH(wl, &old_lastw, sentry) {
|
|
wl2 = winlink_find_by_index(&s->windows, wl->idx);
|
|
if (wl2 != NULL)
|
|
TAILQ_INSERT_TAIL(&s->lastw, wl2, sentry);
|
|
}
|
|
|
|
/* Then free the old winlinks list. */
|
|
while (!RB_EMPTY(&old_windows)) {
|
|
wl = RB_ROOT(&old_windows);
|
|
wl2 = winlink_find_by_window_id(&s->windows, wl->window->id);
|
|
if (wl2 == NULL)
|
|
notify_session_window("window-unlinked", s, wl->window);
|
|
winlink_remove(&old_windows, wl);
|
|
}
|
|
}
|
|
|
|
/* Renumber the windows across winlinks attached to a specific session. */
|
|
void
|
|
session_renumber_windows(struct session *s)
|
|
{
|
|
struct winlink *wl, *wl1, *wl_new;
|
|
struct winlinks old_wins;
|
|
struct winlink_stack old_lastw;
|
|
int new_idx, new_curw_idx;
|
|
|
|
/* Save and replace old window list. */
|
|
memcpy(&old_wins, &s->windows, sizeof old_wins);
|
|
RB_INIT(&s->windows);
|
|
|
|
/* Start renumbering from the base-index if it's set. */
|
|
new_idx = options_get_number(s->options, "base-index");
|
|
new_curw_idx = 0;
|
|
|
|
/* Go through the winlinks and assign new indexes. */
|
|
RB_FOREACH(wl, winlinks, &old_wins) {
|
|
wl_new = winlink_add(&s->windows, new_idx);
|
|
wl_new->session = s;
|
|
winlink_set_window(wl_new, wl->window);
|
|
wl_new->flags |= wl->flags & WINLINK_ALERTFLAGS;
|
|
|
|
if (wl == s->curw)
|
|
new_curw_idx = wl_new->idx;
|
|
|
|
new_idx++;
|
|
}
|
|
|
|
/* Fix the stack of last windows now. */
|
|
memcpy(&old_lastw, &s->lastw, sizeof old_lastw);
|
|
TAILQ_INIT(&s->lastw);
|
|
TAILQ_FOREACH(wl, &old_lastw, sentry) {
|
|
wl_new = winlink_find_by_window(&s->windows, wl->window);
|
|
if (wl_new != NULL)
|
|
TAILQ_INSERT_TAIL(&s->lastw, wl_new, sentry);
|
|
}
|
|
|
|
/* Set the current window. */
|
|
s->curw = winlink_find_by_index(&s->windows, new_curw_idx);
|
|
|
|
/* Free the old winlinks (reducing window references too). */
|
|
RB_FOREACH_SAFE(wl, winlinks, &old_wins, wl1)
|
|
winlink_remove(&old_wins, wl);
|
|
}
|