cmd-attach-session.c

   1 /* $OpenBSD$ */
   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 <stdlib.h>
  22
  23 #include "tmux.h"
  24
  25 /*
  26  * Attach existing session to the current terminal.
  27  */
  28
  29 enum cmd_retval cmd_attach_session_exec(struct cmd *, struct cmd_q *);
  30
  31 const struct cmd_entry cmd_attach_session_entry = {
  32         "attach-session", "attach",
  33         "drt:", 0, 0,
  34         "[-dr] " CMD_TARGET_SESSION_USAGE,
  35         CMD_CANTNEST|CMD_STARTSERVER,
  36         NULL,
  37         cmd_attach_session_exec
  38 };
  39
  40 enum cmd_retval
  41 cmd_attach_session(struct cmd_q *cmdq, const char* tflag, int dflag, int rflag)
  42 {
  43         struct session  *s;
  44         struct client   *c;
  45         const char      *update;
  46         char            *cause;
  47         u_int            i;
  48
  49         if (RB_EMPTY(&sessions)) {
  50                 cmdq_error(cmdq, "no sessions");
  51                 return (CMD_RETURN_ERROR);
  52         }
  53
  54         if ((s = cmd_find_session(cmdq, tflag, 1)) == NULL)
  55                 return (CMD_RETURN_ERROR);
  56
  57         if (cmdq->client == NULL)
  58                 return (CMD_RETURN_NORMAL);
  59
  60         if (cmdq->client->session != NULL) {
  61                 if (dflag) {
  62                         /*
  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 == cmdq->client)
  71                                         continue;
  72                                 server_write_client(c, MSG_DETACH, NULL, 0);
  73                         }
  74                 }
  75
  76                 cmdq->client->session = s;
  77                 notify_attached_session_changed(cmdq->client);
  78                 session_update_activity(s);
  79                 server_redraw_client(cmdq->client);
  80                 s->curw->flags &= ~WINLINK_ALERTFLAGS;
  81         } else {
  82                 if (server_client_open(cmdq->client, s, &cause) != 0) {
  83                         cmdq_error(cmdq, "open terminal failed: %s", cause);
  84                         free(cause);
  85                         return (CMD_RETURN_ERROR);
  86                 }
  87
  88                 if (rflag)
  89                         cmdq->client->flags |= CLIENT_READONLY;
  90
  91                 if (dflag)
  92                         server_write_session(s, MSG_DETACH, NULL, 0);
  93
  94                 update = options_get_string(&s->options, "update-environment");
  95                 environ_update(update, &cmdq->client->environ, &s->environ);
  96
  97                 cmdq->client->session = s;
  98                 notify_attached_session_changed(cmdq->client);
  99                 session_update_activity(s);
 100                 server_redraw_client(cmdq->client);
 101                 s->curw->flags &= ~WINLINK_ALERTFLAGS;
 102
 103                 server_write_ready(cmdq->client);
 104                 cmdq->client_exit = 0;
 105         }
 106         recalculate_sizes();
 107         server_update_socket();
 108
 109         return (CMD_RETURN_NORMAL);
 110 }
 111
 112 enum cmd_retval
 113 cmd_attach_session_exec(struct cmd *self, struct cmd_q *cmdq)
 114 {
 115         struct args     *args = self->args;
 116
 117         return (cmd_attach_session(cmdq, args_get(args, 't'),
 118             args_has(args, 'd'), args_has(args, 'r')));
 119 }