1 /* $OpenBSD: cmd-attach-session.c,v 1.41 2015/09/10 08:58:14 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 <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 enum cmd_retval cmd_attach_session_exec(struct cmd *, struct cmd_q *); 34 35 const struct cmd_entry cmd_attach_session_entry = { 36 "attach-session", "attach", 37 "c:dErt:", 0, 0, 38 "[-dEr] [-c working-directory] " CMD_TARGET_SESSION_USAGE, 39 CMD_STARTSERVER, 40 cmd_attach_session_exec 41 }; 42 43 enum cmd_retval 44 cmd_attach_session(struct cmd_q *cmdq, const char *tflag, int dflag, int rflag, 45 const char *cflag, int Eflag) 46 { 47 struct session *s; 48 struct client *c = cmdq->client, *c_loop; 49 struct winlink *wl = NULL; 50 struct window *w = NULL; 51 struct window_pane *wp = NULL; 52 const char *update; 53 char *cause; 54 int fd; 55 struct format_tree *ft; 56 char *cp; 57 58 if (RB_EMPTY(&sessions)) { 59 cmdq_error(cmdq, "no sessions"); 60 return (CMD_RETURN_ERROR); 61 } 62 63 if (tflag == NULL) { 64 if ((s = cmd_find_session(cmdq, tflag, 1)) == NULL) 65 return (CMD_RETURN_ERROR); 66 } else if (tflag[strcspn(tflag, ":.")] != '\0') { 67 if ((wl = cmd_find_pane(cmdq, tflag, &s, &wp)) == NULL) 68 return (CMD_RETURN_ERROR); 69 } else { 70 if ((s = cmd_find_session(cmdq, tflag, 1)) == NULL) 71 return (CMD_RETURN_ERROR); 72 w = window_find_by_id_str(tflag); 73 if (w == NULL) { 74 wp = window_pane_find_by_id_str(tflag); 75 if (wp != NULL) 76 w = wp->window; 77 } 78 if (w != NULL) 79 wl = winlink_find_by_window(&s->windows, w); 80 } 81 82 if (c == NULL) 83 return (CMD_RETURN_NORMAL); 84 if (server_client_check_nested(c)) { 85 cmdq_error(cmdq, "sessions should be nested with care, " 86 "unset $TMUX to force"); 87 return (CMD_RETURN_ERROR); 88 } 89 90 if (wl != NULL) { 91 if (wp != NULL) 92 window_set_active_pane(wp->window, wp); 93 session_set_current(s, wl); 94 } 95 96 if (c->session != NULL) { 97 if (dflag) { 98 /* 99 * Can't use server_write_session in case attaching to 100 * the same session as currently attached to. 101 */ 102 TAILQ_FOREACH(c_loop, &clients, entry) { 103 if (c_loop->session != s || c == c_loop) 104 continue; 105 server_write_client(c, MSG_DETACH, 106 c_loop->session->name, 107 strlen(c_loop->session->name) + 1); 108 } 109 } 110 111 if (cflag != NULL) { 112 ft = format_create(); 113 format_defaults(ft, cmd_find_client(cmdq, NULL, 1), s, 114 NULL, NULL); 115 cp = format_expand(ft, cflag); 116 format_free(ft); 117 118 fd = open(cp, O_RDONLY|O_DIRECTORY); 119 free(cp); 120 if (fd == -1) { 121 cmdq_error(cmdq, "bad working directory: %s", 122 strerror(errno)); 123 return (CMD_RETURN_ERROR); 124 } 125 close(s->cwd); 126 s->cwd = fd; 127 } 128 129 if (!Eflag) { 130 update = options_get_string(&s->options, 131 "update-environment"); 132 environ_update(update, &c->environ, &s->environ); 133 } 134 135 c->session = s; 136 status_timer_start(c); 137 notify_attached_session_changed(c); 138 session_update_activity(s, NULL); 139 gettimeofday(&s->last_attached_time, NULL); 140 server_redraw_client(c); 141 s->curw->flags &= ~WINLINK_ALERTFLAGS; 142 } else { 143 if (server_client_open(c, &cause) != 0) { 144 cmdq_error(cmdq, "open terminal failed: %s", cause); 145 free(cause); 146 return (CMD_RETURN_ERROR); 147 } 148 149 if (cflag != NULL) { 150 ft = format_create(); 151 format_defaults(ft, cmd_find_client(cmdq, NULL, 1), s, 152 NULL, NULL); 153 cp = format_expand(ft, cflag); 154 format_free(ft); 155 156 fd = open(cp, O_RDONLY|O_DIRECTORY); 157 free(cp); 158 if (fd == -1) { 159 cmdq_error(cmdq, "bad working directory: %s", 160 strerror(errno)); 161 return (CMD_RETURN_ERROR); 162 } 163 close(s->cwd); 164 s->cwd = fd; 165 } 166 167 if (rflag) 168 c->flags |= CLIENT_READONLY; 169 170 if (dflag) { 171 server_write_session(s, MSG_DETACH, s->name, 172 strlen(s->name) + 1); 173 } 174 175 if (!Eflag) { 176 update = options_get_string(&s->options, 177 "update-environment"); 178 environ_update(update, &c->environ, &s->environ); 179 } 180 181 c->session = s; 182 status_timer_start(c); 183 notify_attached_session_changed(c); 184 session_update_activity(s, NULL); 185 gettimeofday(&s->last_attached_time, NULL); 186 server_redraw_client(c); 187 s->curw->flags &= ~WINLINK_ALERTFLAGS; 188 189 server_write_ready(c); 190 cmdq->client_exit = 0; 191 } 192 recalculate_sizes(); 193 server_update_socket(); 194 195 return (CMD_RETURN_NORMAL); 196 } 197 198 enum cmd_retval 199 cmd_attach_session_exec(struct cmd *self, struct cmd_q *cmdq) 200 { 201 struct args *args = self->args; 202 203 return (cmd_attach_session(cmdq, args_get(args, 't'), 204 args_has(args, 'd'), args_has(args, 'r'), args_get(args, 'c'), 205 args_has(args, 'E'))); 206 } 207