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|CMD_SENDENVIRON,
  36         NULL,
  37         NULL,
  38         cmd_attach_session_exec
  39 };
  40
  41 enum cmd_retval
  42 cmd_attach_session(struct cmd_q *cmdq, const char* tflag, int dflag, int rflag)
  43 {
  44         struct session  *s;
  45         struct client   *c;
  46         const char      *update;
  47         char            *cause;
  48         u_int            i;
  49
  50         if (RB_EMPTY(&sessions)) {
  51                 cmdq_error(cmdq, "no sessions");
  52                 return (CMD_RETURN_ERROR);
  53         }
  54
  55         if ((s = cmd_find_session(cmdq, tflag, 1)) == NULL)
  56                 return (CMD_RETURN_ERROR);
  57
  58         if (cmdq->client == NULL)
  59                 return (CMD_RETURN_NORMAL);
  60
  61         if (cmdq->client->session != NULL) {
  62                 if (dflag) {
  63                         /*
  64                          * Can't use server_write_session in case attaching to
  65                          * the same session as currently attached to.
  66                          */
  67                         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
  68                                 c = ARRAY_ITEM(&clients, i);
  69                                 if (c == NULL || c->session != s)
  70                                         continue;
  71                                 if (c == cmdq->client)
  72                                         continue;
  73                                 server_write_client(c, MSG_DETACH, NULL, 0);
  74                         }
  75                 }
  76
  77                 cmdq->client->session = s;
  78                 notify_attached_session_changed(cmdq->client);
  79                 session_update_activity(s);
  80                 server_redraw_client(cmdq->client);
  81                 s->curw->flags &= ~WINLINK_ALERTFLAGS;
  82         } else {
  83                 if (server_client_open(cmdq->client, s, &cause) != 0) {
  84                         cmdq_error(cmdq, "open terminal failed: %s", cause);
  85                         free(cause);
  86                         return (CMD_RETURN_ERROR);
  87                 }
  88
  89                 if (rflag)
  90                         cmdq->client->flags |= CLIENT_READONLY;
  91
  92                 if (dflag)
  93                         server_write_session(s, MSG_DETACH, NULL, 0);
  94
  95                 update = options_get_string(&s->options, "update-environment");
  96                 environ_update(update, &cmdq->client->environ, &s->environ);
  97
  98                 cmdq->client->session = s;
  99                 notify_attached_session_changed(cmdq->client);
 100                 session_update_activity(s);
 101                 server_redraw_client(cmdq->client);
 102                 s->curw->flags &= ~WINLINK_ALERTFLAGS;
 103
 104                 server_write_ready(cmdq->client);
 105                 cmdq->client_exit = 0;
 106         }
 107         recalculate_sizes();
 108         server_update_socket();
 109
 110         return (CMD_RETURN_NORMAL);
 111 }
 112
 113 enum cmd_retval
 114 cmd_attach_session_exec(struct cmd *self, struct cmd_q *cmdq)
 115 {
 116         struct args     *args = self->args;
 117
 118         return (cmd_attach_session(cmdq, args_get(args, 't'),
 119             args_has(args, 'd'), args_has(args, 'r')));
 120 }