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Annotation of embedaddon/tmux/cmd-attach-session.c, revision 1.1

1.1     ! misho       1: /* $OpenBSD$ */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
        !             5:  *
        !             6:  * Permission to use, copy, modify, and distribute this software for any
        !             7:  * purpose with or without fee is hereby granted, provided that the above
        !             8:  * copyright notice and this permission notice appear in all copies.
        !             9:  *
        !            10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            14:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
        !            15:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
        !            16:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            17:  */
        !            18: 
        !            19: #include <sys/types.h>
        !            20: 
        !            21: #include <errno.h>
        !            22: #include <fcntl.h>
        !            23: #include <stdlib.h>
        !            24: #include <string.h>
        !            25: #include <unistd.h>
        !            26: 
        !            27: #include "tmux.h"
        !            28: 
        !            29: /*
        !            30:  * Attach existing session to the current terminal.
        !            31:  */
        !            32: 
        !            33: static enum cmd_retval cmd_attach_session_exec(struct cmd *,
        !            34:                            struct cmdq_item *);
        !            35: 
        !            36: const struct cmd_entry cmd_attach_session_entry = {
        !            37:        .name = "attach-session",
        !            38:        .alias = "attach",
        !            39: 
        !            40:        .args = { "c:dErt:", 0, 0 },
        !            41:        .usage = "[-dEr] [-c working-directory] " CMD_TARGET_SESSION_USAGE,
        !            42: 
        !            43:        .tflag = CMD_SESSION_WITHPANE,
        !            44: 
        !            45:        .flags = CMD_STARTSERVER,
        !            46:        .exec = cmd_attach_session_exec
        !            47: };
        !            48: 
        !            49: enum cmd_retval
        !            50: cmd_attach_session(struct cmdq_item *item, int dflag, int rflag,
        !            51:     const char *cflag, int Eflag)
        !            52: {
        !            53:        struct session          *s = item->state.tflag.s;
        !            54:        struct client           *c = item->client, *c_loop;
        !            55:        struct winlink          *wl = item->state.tflag.wl;
        !            56:        struct window_pane      *wp = item->state.tflag.wp;
        !            57:        char                    *cause;
        !            58: 
        !            59:        if (RB_EMPTY(&sessions)) {
        !            60:                cmdq_error(item, "no sessions");
        !            61:                return (CMD_RETURN_ERROR);
        !            62:        }
        !            63: 
        !            64:        if (c == NULL)
        !            65:                return (CMD_RETURN_NORMAL);
        !            66:        if (server_client_check_nested(c)) {
        !            67:                cmdq_error(item, "sessions should be nested with care, "
        !            68:                    "unset $TMUX to force");
        !            69:                return (CMD_RETURN_ERROR);
        !            70:        }
        !            71: 
        !            72:        if (wl != NULL) {
        !            73:                if (wp != NULL)
        !            74:                        window_set_active_pane(wp->window, wp);
        !            75:                session_set_current(s, wl);
        !            76:        }
        !            77: 
        !            78:        if (cflag != NULL) {
        !            79:                free((void *)s->cwd);
        !            80:                s->cwd = format_single(item, cflag, c, s, wl, wp);
        !            81:        }
        !            82: 
        !            83:        if (c->session != NULL) {
        !            84:                if (dflag) {
        !            85:                        TAILQ_FOREACH(c_loop, &clients, entry) {
        !            86:                                if (c_loop->session != s || c == c_loop)
        !            87:                                        continue;
        !            88:                                server_client_detach(c_loop, MSG_DETACH);
        !            89:                        }
        !            90:                }
        !            91:                if (!Eflag)
        !            92:                        environ_update(s->options, c->environ, s->environ);
        !            93: 
        !            94:                c->session = s;
        !            95:                if (!item->repeat)
        !            96:                        server_client_set_key_table(c, NULL);
        !            97:                status_timer_start(c);
        !            98:                notify_client("client-session-changed", c);
        !            99:                session_update_activity(s, NULL);
        !           100:                gettimeofday(&s->last_attached_time, NULL);
        !           101:                server_redraw_client(c);
        !           102:                s->curw->flags &= ~WINLINK_ALERTFLAGS;
        !           103:        } else {
        !           104:                if (server_client_open(c, &cause) != 0) {
        !           105:                        cmdq_error(item, "open terminal failed: %s", cause);
        !           106:                        free(cause);
        !           107:                        return (CMD_RETURN_ERROR);
        !           108:                }
        !           109:                if (rflag)
        !           110:                        c->flags |= CLIENT_READONLY;
        !           111: 
        !           112:                if (dflag) {
        !           113:                        TAILQ_FOREACH(c_loop, &clients, entry) {
        !           114:                                if (c_loop->session != s || c == c_loop)
        !           115:                                        continue;
        !           116:                                server_client_detach(c_loop, MSG_DETACH);
        !           117:                        }
        !           118:                }
        !           119:                if (!Eflag)
        !           120:                        environ_update(s->options, c->environ, s->environ);
        !           121: 
        !           122:                c->session = s;
        !           123:                server_client_set_key_table(c, NULL);
        !           124:                status_timer_start(c);
        !           125:                notify_client("client-session-changed", c);
        !           126:                session_update_activity(s, NULL);
        !           127:                gettimeofday(&s->last_attached_time, NULL);
        !           128:                server_redraw_client(c);
        !           129:                s->curw->flags &= ~WINLINK_ALERTFLAGS;
        !           130: 
        !           131:                if (~c->flags & CLIENT_CONTROL)
        !           132:                        proc_send(c->peer, MSG_READY, -1, NULL, 0);
        !           133:                notify_client("client-attached", c);
        !           134:                c->flags |= CLIENT_ATTACHED;
        !           135:        }
        !           136:        recalculate_sizes();
        !           137:        alerts_check_session(s);
        !           138:        server_update_socket();
        !           139: 
        !           140:        return (CMD_RETURN_NORMAL);
        !           141: }
        !           142: 
        !           143: static enum cmd_retval
        !           144: cmd_attach_session_exec(struct cmd *self, struct cmdq_item *item)
        !           145: {
        !           146:        struct args     *args = self->args;
        !           147: 
        !           148:        return (cmd_attach_session(item, args_has(args, 'd'),
        !           149:            args_has(args, 'r'), args_get(args, 'c'), args_has(args, 'E')));
        !           150: }