1 /* $OpenBSD: cmd-attach-session.c,v 1.16 2011/04/05 19:37:01 nicm Exp $ */ 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 "drt:", 0, 0, 32 "[-dr] " CMD_TARGET_SESSION_USAGE, 33 CMD_CANTNEST|CMD_STARTSERVER|CMD_SENDENVIRON, 34 NULL, 35 NULL, 36 cmd_attach_session_exec 37 }; 38 39 int 40 cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx) 41 { 42 struct args *args = self->args; 43 struct session *s; 44 struct client *c; 45 const char *update; 46 char *overrides, *cause; 47 u_int i; 48 49 if (RB_EMPTY(&sessions)) { 50 ctx->error(ctx, "no sessions"); 51 return (-1); 52 } 53 54 if ((s = cmd_find_session(ctx, args_get(args, 't'), 1)) == NULL) 55 return (-1); 56 57 if (ctx->cmdclient == NULL && ctx->curclient == NULL) 58 return (0); 59 60 if (ctx->cmdclient == NULL) { 61 if (args_has(self->args, 'd')) { 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 == ctx->curclient) 71 continue; 72 server_write_client(c, MSG_DETACH, NULL, 0); 73 } 74 } 75 76 ctx->curclient->session = s; 77 session_update_activity(s); 78 server_redraw_client(ctx->curclient); 79 } else { 80 if (!(ctx->cmdclient->flags & CLIENT_TERMINAL)) { 81 ctx->error(ctx, "not a terminal"); 82 return (-1); 83 } 84 85 overrides = 86 options_get_string(&s->options, "terminal-overrides"); 87 if (tty_open(&ctx->cmdclient->tty, overrides, &cause) != 0) { 88 ctx->error(ctx, "terminal open failed: %s", cause); 89 xfree(cause); 90 return (-1); 91 } 92 93 if (args_has(self->args, 'r')) 94 ctx->cmdclient->flags |= CLIENT_READONLY; 95 96 if (args_has(self->args, 'd')) 97 server_write_session(s, MSG_DETACH, NULL, 0); 98 99 ctx->cmdclient->session = s; 100 session_update_activity(s); 101 server_write_client(ctx->cmdclient, MSG_READY, NULL, 0); 102 103 update = options_get_string(&s->options, "update-environment"); 104 environ_update(update, &ctx->cmdclient->environ, &s->environ); 105 106 server_redraw_client(ctx->cmdclient); 107 } 108 recalculate_sizes(); 109 server_update_socket(); 110 111 return (1); /* 1 means don't tell command client to exit */ 112 } 113