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Annotation of src/usr.bin/tmux/cmd-attach-session.c, Revision 1.4

1.4     ! nicm        1: /* $OpenBSD: cmd-attach-session.c,v 1.3 2009/07/13 23:11:35 nicm Exp $ */
1.1       nicm        2:
                      3: /*
                      4:  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
                      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 "tmux.h"
                     22:
                     23: /*
                     24:  * Attach existing session to the current terminal.
                     25:  */
                     26:
                     27: int    cmd_attach_session_exec(struct cmd *, struct cmd_ctx *);
                     28:
                     29: const struct cmd_entry cmd_attach_session_entry = {
                     30:        "attach-session", "attach",
                     31:        "[-d] " CMD_TARGET_SESSION_USAGE,
1.3       nicm       32:                CMD_CANTNEST|CMD_STARTSERVER, CMD_CHFLAG('d'),
1.1       nicm       33:        cmd_target_init,
                     34:        cmd_target_parse,
                     35:        cmd_attach_session_exec,
                     36:        cmd_target_send,
                     37:        cmd_target_recv,
                     38:        cmd_target_free,
                     39:        cmd_target_print
                     40: };
                     41:
                     42: int
                     43: cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
                     44: {
                     45:        struct cmd_target_data  *data = self->data;
                     46:        struct session          *s;
1.4     ! nicm       47:        struct client           *c;
1.1       nicm       48:        char                    *cause;
1.4     ! nicm       49:        u_int                    i;
1.1       nicm       50:
                     51:        if (ARRAY_LENGTH(&sessions) == 0) {
                     52:                ctx->error(ctx, "no sessions");
                     53:                return (-1);
                     54:        }
                     55:        if ((s = cmd_find_session(ctx, data->target)) == NULL)
                     56:                return (-1);
                     57:
1.4     ! nicm       58:        if (ctx->cmdclient == NULL) {
        !            59:                if (data->chflags & CMD_CHFLAG('d')) {
        !            60:                        /*
        !            61:                         * Can't use server_write_session in case attaching to
        !            62:                         * the same session as currently attached to.
        !            63:                         */
        !            64:                        for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
        !            65:                                c = ARRAY_ITEM(&clients, i);
        !            66:                                if (c == NULL || c->session != s)
        !            67:                                        continue;
        !            68:                                if (c == ctx->curclient)
        !            69:                                        continue;
        !            70:                                server_write_client(c, MSG_DETACH, NULL, 0);
        !            71:                        }
        !            72:                }
        !            73:
        !            74:                ctx->curclient->session = s;
        !            75:                server_redraw_client(ctx->curclient);
        !            76:        } else {
        !            77:                if (!(ctx->cmdclient->flags & CLIENT_TERMINAL)) {
        !            78:                        ctx->error(ctx, "not a terminal");
        !            79:                        return (-1);
        !            80:                }
        !            81:
        !            82:                if (tty_open(&ctx->cmdclient->tty, &cause) != 0) {
        !            83:                        ctx->error(ctx, "terminal open failed: %s", cause);
        !            84:                        xfree(cause);
        !            85:                        return (-1);
        !            86:                }
        !            87:
        !            88:                if (data->chflags & CMD_CHFLAG('d'))
        !            89:                        server_write_session(s, MSG_DETACH, NULL, 0);
        !            90:
        !            91:                ctx->cmdclient->session = s;
        !            92:                server_write_client(ctx->cmdclient, MSG_READY, NULL, 0);
        !            93:                server_redraw_client(ctx->cmdclient);
1.1       nicm       94:        }
                     95:        recalculate_sizes();
                     96:
1.4     ! nicm       97:        return (1);     /* 1 means don't tell command client to exit */
1.1       nicm       98: }