mirror of https://github.com/tmux/tmux.git
596 lines
13 KiB
C
596 lines
13 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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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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/* Global session list. */
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struct sessions sessions;
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struct sessions dead_sessions;
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struct session_groups session_groups;
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struct winlink *session_next_activity(struct session *, struct winlink *);
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struct winlink *session_previous_activity(struct session *, struct winlink *);
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void
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session_alert_cancel(struct session *s, struct winlink *wl)
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{
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struct session_alert *sa, *sb;
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sa = SLIST_FIRST(&s->alerts);
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while (sa != NULL) {
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sb = sa;
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sa = SLIST_NEXT(sa, entry);
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if (wl == NULL || sb->wl == wl) {
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SLIST_REMOVE(&s->alerts, sb, session_alert, entry);
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xfree(sb);
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}
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}
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}
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void
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session_alert_add(struct session *s, struct window *w, int type)
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{
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struct session_alert *sa;
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struct winlink *wl;
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RB_FOREACH(wl, winlinks, &s->windows) {
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if (wl == s->curw)
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continue;
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if (wl->window == w &&
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!session_alert_has(s, wl, type)) {
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sa = xmalloc(sizeof *sa);
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sa->wl = wl;
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sa->type = type;
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SLIST_INSERT_HEAD(&s->alerts, sa, entry);
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}
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}
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}
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int
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session_alert_has(struct session *s, struct winlink *wl, int type)
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{
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struct session_alert *sa;
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SLIST_FOREACH(sa, &s->alerts, entry) {
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if (sa->wl == wl && sa->type == type)
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return (1);
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}
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return (0);
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}
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int
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session_alert_has_window(struct session *s, struct window *w, int type)
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{
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struct session_alert *sa;
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SLIST_FOREACH(sa, &s->alerts, entry) {
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if (sa->wl->window == w && sa->type == type)
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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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u_int i;
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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s = ARRAY_ITEM(&sessions, i);
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if (s != NULL && strcmp(s->name, name) == 0)
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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, const char *cmd, const char *cwd,
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struct environ *env, struct termios *tio, int idx, u_int sx, u_int sy,
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char **cause)
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{
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struct session *s;
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u_int i;
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s = xmalloc(sizeof *s);
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s->references = 0;
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s->flags = 0;
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s->activity = time(NULL);
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if (gettimeofday(&s->tv, NULL) != 0)
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fatal("gettimeofday failed");
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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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SLIST_INIT(&s->alerts);
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paste_init_stack(&s->buffers);
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options_init(&s->options, &global_s_options);
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environ_init(&s->environ);
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if (env != NULL)
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environ_copy(env, &s->environ);
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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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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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if (ARRAY_ITEM(&sessions, i) == NULL) {
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ARRAY_SET(&sessions, i, s);
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break;
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}
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}
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if (i == ARRAY_LENGTH(&sessions))
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ARRAY_ADD(&sessions, s);
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if (name != NULL)
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s->name = xstrdup(name);
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else
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xasprintf(&s->name, "%u", i);
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if (cmd != NULL) {
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if (session_new(s, NULL, cmd, cwd, idx, cause) == 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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/* 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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u_int i;
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log_debug("session %s destroyed", s->name);
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if (session_index(s, &i) != 0)
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fatalx("session not found");
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ARRAY_SET(&sessions, i, NULL);
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while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
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ARRAY_TRUNC(&sessions, 1);
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if (s->tio != NULL)
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xfree(s->tio);
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session_group_remove(s);
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session_alert_cancel(s, NULL);
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environ_free(&s->environ);
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options_free(&s->options);
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paste_free_stack(&s->buffers);
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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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winlink_remove(&s->windows, RB_ROOT(&s->windows));
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xfree(s->name);
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for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
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if (ARRAY_ITEM(&dead_sessions, i) == NULL) {
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ARRAY_SET(&dead_sessions, i, s);
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break;
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}
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}
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if (i == ARRAY_LENGTH(&dead_sessions))
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ARRAY_ADD(&dead_sessions, s);
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s->flags |= SESSION_DEAD;
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}
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/* Find session index. */
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int
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session_index(struct session *s, u_int *i)
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{
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for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
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if (s == ARRAY_ITEM(&sessions, *i))
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return (0);
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}
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return (-1);
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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,
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const char *name, const char *cmd, const char *cwd, int idx, char **cause)
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{
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struct window *w;
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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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environ_init(&env);
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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(
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name, cmd, shell, cwd, &env, s->tio, s->sx, s->sy, hlimit, cause);
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if (w == NULL) {
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environ_free(&env);
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return (NULL);
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}
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environ_free(&env);
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if (options_get_number(&s->options, "set-remain-on-exit"))
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options_set_number(&w->options, "remain-on-exit", 1);
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return (session_attach(s, w, idx, cause));
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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, w, idx)) == NULL)
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xasprintf(cause, "index in use: %d", idx);
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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 && session_previous(s, 0) != 0)
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session_next(s, 0);
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session_alert_cancel(s, wl);
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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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RB_FOREACH(wl, winlinks, &s->windows) {
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if (wl->window == w)
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return (1);
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}
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return (0);
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}
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struct winlink *
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session_next_activity(struct session *s, struct winlink *wl)
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{
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while (wl != NULL) {
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if (session_alert_has(s, wl, WINDOW_BELL))
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break;
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if (session_alert_has(s, wl, WINDOW_ACTIVITY))
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break;
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if (session_alert_has(s, wl, WINDOW_CONTENT))
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break;
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wl = winlink_next(&s->windows, 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 activity)
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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->windows, s->curw);
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if (activity)
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wl = session_next_activity(s, wl);
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if (wl == NULL) {
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wl = RB_MIN(winlinks, &s->windows);
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if (activity && ((wl = session_next_activity(s, wl)) == NULL))
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return (-1);
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}
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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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session_alert_cancel(s, wl);
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return (0);
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}
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struct winlink *
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session_previous_activity(struct session *s, struct winlink *wl)
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{
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while (wl != NULL) {
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if (session_alert_has(s, wl, WINDOW_BELL))
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break;
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if (session_alert_has(s, wl, WINDOW_ACTIVITY))
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break;
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if (session_alert_has(s, wl, WINDOW_CONTENT))
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break;
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wl = winlink_previous(&s->windows, 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 activity)
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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->windows, s->curw);
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if (activity)
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wl = session_previous_activity(s, wl);
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if (wl == NULL) {
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wl = RB_MAX(winlinks, &s->windows);
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if (activity && (wl = session_previous_activity(s, wl)) == NULL)
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return (-1);
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}
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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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session_alert_cancel(s, wl);
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return (0);
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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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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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session_alert_cancel(s, wl);
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return (0);
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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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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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session_alert_cancel(s, wl);
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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;
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i = 0;
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TAILQ_FOREACH(sg2, &session_groups, entry) {
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if (sg == sg2)
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return (i);
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i++;
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}
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fatalx("session group not found");
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}
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/*
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* Add a session to the session group containing target, creating it if
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* necessary.
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*/
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void
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session_group_add(struct session *target, struct session *s)
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{
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struct session_group *sg;
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if ((sg = session_group_find(target)) == NULL) {
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sg = xmalloc(sizeof *sg);
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TAILQ_INSERT_TAIL(&session_groups, sg, entry);
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TAILQ_INIT(&sg->sessions);
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TAILQ_INSERT_TAIL(&sg->sessions, target, gentry);
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}
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TAILQ_INSERT_TAIL(&sg->sessions, s, gentry);
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}
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/* Remove a session from its group and destroy the group if empty. */
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void
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session_group_remove(struct session *s)
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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;
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TAILQ_REMOVE(&sg->sessions, s, gentry);
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if (TAILQ_NEXT(TAILQ_FIRST(&sg->sessions), gentry) == NULL)
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TAILQ_REMOVE(&sg->sessions, TAILQ_FIRST(&sg->sessions), gentry);
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if (TAILQ_EMPTY(&sg->sessions)) {
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TAILQ_REMOVE(&session_groups, sg, entry);
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xfree(sg);
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}
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}
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/* Synchronize a session to its session group. */
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void
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session_group_synchronize_to(struct session *s)
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{
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struct session_group *sg;
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struct session *target;
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if ((sg = session_group_find(s)) == NULL)
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return;
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target = NULL;
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TAILQ_FOREACH(target, &sg->sessions, gentry) {
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if (target != s)
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break;
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}
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session_group_synchronize1(target, s);
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}
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/* Synchronize a session group to a session. */
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void
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session_group_synchronize_from(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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if ((sg = session_group_find(target)) == NULL)
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return;
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TAILQ_FOREACH(s, &sg->sessions, gentry) {
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if (s != target)
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session_group_synchronize1(target, s);
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}
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}
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/*
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* Synchronize a session with a target session. This means destroying all
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* winlinks then recreating them, then updating the current window, last window
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* stack and alerts.
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*/
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void
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session_group_synchronize1(struct session *target, struct session *s)
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{
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struct winlinks old_windows, *ww;
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struct winlink_stack old_lastw;
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struct winlink *wl, *wl2;
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struct session_alert *sa;
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/* Don't do anything if the session is empty (it'll be destroyed). */
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ww = &target->windows;
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if (RB_EMPTY(ww))
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return;
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/* If the current window has vanished, move to the next now. */
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if (s->curw != NULL) {
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while (winlink_find_by_index(ww, s->curw->idx) == NULL)
|
|
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)
|
|
winlink_add(&s->windows, wl->window, wl->idx);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* And update the alerts list. */
|
|
SLIST_FOREACH(sa, &s->alerts, entry) {
|
|
wl = winlink_find_by_index(&s->windows, sa->wl->idx);
|
|
if (wl == NULL)
|
|
session_alert_cancel(s, sa->wl);
|
|
else
|
|
sa->wl = wl;
|
|
}
|
|
|
|
/* Then free the old winlinks list. */
|
|
while (!RB_EMPTY(&old_windows)) {
|
|
wl = RB_ROOT(&old_windows);
|
|
RB_REMOVE(winlinks, &old_windows, wl);
|
|
xfree(wl);
|
|
}
|
|
}
|