1 /* $OpenBSD: cmd-attach-session.c,v 1.69 2017/02/06 15:00:41 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 if (!item->repeat) 102 server_client_set_key_table(c, NULL); 103 status_timer_start(c); 104 notify_client("client-session-changed", c); 105 session_update_activity(s, NULL); 106 gettimeofday(&s->last_attached_time, NULL); 107 server_redraw_client(c); 108 s->curw->flags &= ~WINLINK_ALERTFLAGS; 109 } else { 110 if (server_client_open(c, &cause) != 0) { 111 cmdq_error(item, "open terminal failed: %s", cause); 112 free(cause); 113 return (CMD_RETURN_ERROR); 114 } 115 if (rflag) 116 c->flags |= CLIENT_READONLY; 117 118 if (dflag) { 119 TAILQ_FOREACH(c_loop, &clients, entry) { 120 if (c_loop->session != s || c == c_loop) 121 continue; 122 server_client_detach(c_loop, MSG_DETACH); 123 } 124 } 125 if (!Eflag) 126 environ_update(s->options, c->environ, s->environ); 127 128 c->session = s; 129 server_client_set_key_table(c, NULL); 130 status_timer_start(c); 131 notify_client("client-session-changed", c); 132 session_update_activity(s, NULL); 133 gettimeofday(&s->last_attached_time, NULL); 134 server_redraw_client(c); 135 s->curw->flags &= ~WINLINK_ALERTFLAGS; 136 137 if (~c->flags & CLIENT_CONTROL) 138 proc_send(c->peer, MSG_READY, -1, NULL, 0); 139 notify_client("client-attached", c); 140 c->flags |= CLIENT_ATTACHED; 141 } 142 recalculate_sizes(); 143 alerts_check_session(s); 144 server_update_socket(); 145 146 return (CMD_RETURN_NORMAL); 147 } 148 149 static enum cmd_retval 150 cmd_attach_session_exec(struct cmd *self, struct cmdq_item *item) 151 { 152 struct args *args = self->args; 153 154 return (cmd_attach_session(item, args_has(args, 'd'), 155 args_has(args, 'r'), args_get(args, 'c'), args_has(args, 'E'))); 156 } 157