1 /* $OpenBSD: cmd-attach-session.c,v 1.68 2017/02/03 11:57:27 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> 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 <errno.h> 22 #include <fcntl.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <unistd.h> 26 27 #include "tmux.h" 28 29 /* 30 * Attach existing session to the current terminal. 31 */ 32 33 static enum cmd_retval cmd_attach_session_exec(struct cmd *, 34 struct cmdq_item *); 35 36 const struct cmd_entry cmd_attach_session_entry = { 37 .name = "attach-session", 38 .alias = "attach", 39 40 .args = { "c:dErt:", 0, 0 }, 41 .usage = "[-dEr] [-c working-directory] " CMD_TARGET_SESSION_USAGE, 42 43 .tflag = CMD_SESSION_WITHPANE, 44 45 .flags = CMD_STARTSERVER, 46 .exec = cmd_attach_session_exec 47 }; 48 49 enum cmd_retval 50 cmd_attach_session(struct cmdq_item *item, int dflag, int rflag, 51 const char *cflag, int Eflag) 52 { 53 struct session *s = item->state.tflag.s; 54 struct client *c = item->client, *c_loop; 55 struct winlink *wl = item->state.tflag.wl; 56 struct window_pane *wp = item->state.tflag.wp; 57 char *cause, *cwd; 58 struct format_tree *ft; 59 60 if (RB_EMPTY(&sessions)) { 61 cmdq_error(item, "no sessions"); 62 return (CMD_RETURN_ERROR); 63 } 64 65 if (c == NULL) 66 return (CMD_RETURN_NORMAL); 67 if (server_client_check_nested(c)) { 68 cmdq_error(item, "sessions should be nested with care, " 69 "unset $TMUX to force"); 70 return (CMD_RETURN_ERROR); 71 } 72 73 if (wl != NULL) { 74 if (wp != NULL) 75 window_set_active_pane(wp->window, wp); 76 session_set_current(s, wl); 77 } 78 79 if (cflag != NULL) { 80 ft = format_create(item, FORMAT_NONE, 0); 81 format_defaults(ft, c, s, wl, wp); 82 cwd = format_expand(ft, cflag); 83 format_free(ft); 84 85 free((void *)s->cwd); 86 s->cwd = cwd; 87 } 88 89 if (c->session != NULL) { 90 if (dflag) { 91 TAILQ_FOREACH(c_loop, &clients, entry) { 92 if (c_loop->session != s || c == c_loop) 93 continue; 94 server_client_detach(c_loop, MSG_DETACH); 95 } 96 } 97 if (!Eflag) 98 environ_update(s->options, c->environ, s->environ); 99 100 c->session = s; 101 status_timer_start(c); 102 notify_client("client-session-changed", c); 103 session_update_activity(s, NULL); 104 gettimeofday(&s->last_attached_time, NULL); 105 server_redraw_client(c); 106 s->curw->flags &= ~WINLINK_ALERTFLAGS; 107 } else { 108 if (server_client_open(c, &cause) != 0) { 109 cmdq_error(item, "open terminal failed: %s", cause); 110 free(cause); 111 return (CMD_RETURN_ERROR); 112 } 113 if (rflag) 114 c->flags |= CLIENT_READONLY; 115 116 if (dflag) { 117 TAILQ_FOREACH(c_loop, &clients, entry) { 118 if (c_loop->session != s || c == c_loop) 119 continue; 120 server_client_detach(c_loop, MSG_DETACH); 121 } 122 } 123 if (!Eflag) 124 environ_update(s->options, c->environ, s->environ); 125 126 c->session = s; 127 server_client_set_key_table(c, NULL); 128 status_timer_start(c); 129 notify_client("client-session-changed", c); 130 session_update_activity(s, NULL); 131 gettimeofday(&s->last_attached_time, NULL); 132 server_redraw_client(c); 133 s->curw->flags &= ~WINLINK_ALERTFLAGS; 134 135 if (~c->flags & CLIENT_CONTROL) 136 proc_send(c->peer, MSG_READY, -1, NULL, 0); 137 notify_client("client-attached", c); 138 c->flags |= CLIENT_ATTACHED; 139 } 140 recalculate_sizes(); 141 alerts_check_session(s); 142 server_update_socket(); 143 144 return (CMD_RETURN_NORMAL); 145 } 146 147 static enum cmd_retval 148 cmd_attach_session_exec(struct cmd *self, struct cmdq_item *item) 149 { 150 struct args *args = self->args; 151 152 return (cmd_attach_session(item, args_has(args, 'd'), 153 args_has(args, 'r'), args_get(args, 'c'), args_has(args, 'E'))); 154 } 155