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Annotation of src/usr.bin/tmux/cmd-attach-session.c, Revision 1.11

1.11    ! nicm        1: /* $OpenBSD: cmd-attach-session.c,v 1.10 2009/11/13 19:53:28 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,
1.11    ! nicm       32:        CMD_CANTNEST|CMD_STARTSERVER|CMD_SENDENVIRON, "d",
1.1       nicm       33:        cmd_target_init,
                     34:        cmd_target_parse,
                     35:        cmd_attach_session_exec,
                     36:        cmd_target_free,
                     37:        cmd_target_print
                     38: };
                     39:
                     40: int
                     41: cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
                     42: {
                     43:        struct cmd_target_data  *data = self->data;
                     44:        struct session          *s;
1.4       nicm       45:        struct client           *c;
1.8       nicm       46:        const char              *update;
1.7       nicm       47:        char                    *overrides, *cause;
1.4       nicm       48:        u_int                    i;
1.1       nicm       49:
                     50:        if (ARRAY_LENGTH(&sessions) == 0) {
                     51:                ctx->error(ctx, "no sessions");
                     52:                return (-1);
                     53:        }
                     54:        if ((s = cmd_find_session(ctx, data->target)) == NULL)
                     55:                return (-1);
1.5       nicm       56:
                     57:        if (ctx->cmdclient == NULL && ctx->curclient == NULL)
                     58:                return (0);
1.1       nicm       59:
1.4       nicm       60:        if (ctx->cmdclient == NULL) {
1.10      nicm       61:                if (cmd_check_flag(data->chflags, 'd')) {
1.11    ! nicm       62:                        /*
1.4       nicm       63:                         * Can't use server_write_session in case attaching to
                     64:                         * the same session as currently attached to.
                     65:                         */
                     66:                        for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
                     67:                                c = ARRAY_ITEM(&clients, i);
                     68:                                if (c == NULL || c->session != s)
                     69:                                        continue;
                     70:                                if (c == ctx->curclient)
                     71:                                        continue;
                     72:                                server_write_client(c, MSG_DETACH, NULL, 0);
                     73:                        }
                     74:                }
1.11    ! nicm       75:
1.4       nicm       76:                ctx->curclient->session = s;
                     77:                server_redraw_client(ctx->curclient);
                     78:        } else {
                     79:                if (!(ctx->cmdclient->flags & CLIENT_TERMINAL)) {
                     80:                        ctx->error(ctx, "not a terminal");
                     81:                        return (-1);
                     82:                }
                     83:
1.7       nicm       84:                overrides =
                     85:                    options_get_string(&s->options, "terminal-overrides");
                     86:                if (tty_open(&ctx->cmdclient->tty, overrides, &cause) != 0) {
1.4       nicm       87:                        ctx->error(ctx, "terminal open failed: %s", cause);
                     88:                        xfree(cause);
                     89:                        return (-1);
                     90:                }
                     91:
1.10      nicm       92:                if (cmd_check_flag(data->chflags, 'd'))
1.4       nicm       93:                        server_write_session(s, MSG_DETACH, NULL, 0);
                     94:
                     95:                ctx->cmdclient->session = s;
                     96:                server_write_client(ctx->cmdclient, MSG_READY, NULL, 0);
1.8       nicm       97:
                     98:                update = options_get_string(&s->options, "update-environment");
                     99:                environ_update(update, &ctx->cmdclient->environ, &s->environ);
                    100:
1.4       nicm      101:                server_redraw_client(ctx->cmdclient);
1.1       nicm      102:        }
                    103:        recalculate_sizes();
1.9       nicm      104:        server_update_socket();
1.1       nicm      105:
1.4       nicm      106:        return (1);     /* 1 means don't tell command client to exit */
1.1       nicm      107: }