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15b643fc11
== Rather than constructing an entire termios struct from ttydefaults.h, just let forkpty do it and then alter the bits that should be changed after fork. A little neater and more portable. == This should fix problems caused by glibc's broken ttydefaults.h file.
420 lines
9.1 KiB
C
420 lines
9.1 KiB
C
/* $Id: session.c,v 1.66 2009-09-16 12:36:27 nicm Exp $ */
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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 <string.h>
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#include <stdlib.h>
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#include <unistd.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 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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if (gettimeofday(&s->tv, NULL) != 0)
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fatal("gettimeofday");
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s->curw = NULL;
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SLIST_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 (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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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_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 (!SLIST_EMPTY(&s->lastw))
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winlink_stack_remove(&s->lastw, SLIST_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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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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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 = SLIST_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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