1 /* $OpenBSD: cmd-new-session.c,v 1.63 2014/10/20 23:35:28 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 <termios.h> 26 #include <unistd.h> 27 28 #include "tmux.h" 29 30 /* 31 * Create a new session and attach to the current terminal unless -d is given. 32 */ 33 34 #define NEW_SESSION_TEMPLATE "#{session_name}:" 35 36 enum cmd_retval cmd_new_session_exec(struct cmd *, struct cmd_q *); 37 38 const struct cmd_entry cmd_new_session_entry = { 39 "new-session", "new", 40 "Ac:dDF:n:Ps:t:x:y:", 0, -1, 41 "[-AdDP] [-c start-directory] [-F format] [-n window-name] " 42 "[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] " 43 "[-y height] [command]", 44 CMD_STARTSERVER|CMD_CANTNEST, 45 cmd_new_session_exec 46 }; 47 48 const struct cmd_entry cmd_has_session_entry = { 49 "has-session", "has", 50 "t:", 0, 0, 51 CMD_TARGET_SESSION_USAGE, 52 0, 53 cmd_new_session_exec 54 }; 55 56 enum cmd_retval 57 cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq) 58 { 59 struct args *args = self->args; 60 struct client *c = cmdq->client, *c0; 61 struct session *s, *groupwith; 62 struct window *w; 63 struct environ env; 64 struct termios tio, *tiop; 65 const char *newname, *target, *update, *errstr, *template; 66 const char *path; 67 char **argv, *cmd, *cause, *cp; 68 int detached, already_attached, idx, cwd, fd = -1; 69 int argc; 70 u_int sx, sy; 71 struct format_tree *ft; 72 struct environ_entry *envent; 73 74 if (self->entry == &cmd_has_session_entry) { 75 if (cmd_find_session(cmdq, args_get(args, 't'), 0) == NULL) 76 return (CMD_RETURN_ERROR); 77 return (CMD_RETURN_NORMAL); 78 } 79 80 if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) { 81 cmdq_error(cmdq, "command or window name given with target"); 82 return (CMD_RETURN_ERROR); 83 } 84 85 newname = args_get(args, 's'); 86 if (newname != NULL) { 87 if (!session_check_name(newname)) { 88 cmdq_error(cmdq, "bad session name: %s", newname); 89 return (CMD_RETURN_ERROR); 90 } 91 if (session_find(newname) != NULL) { 92 if (args_has(args, 'A')) { 93 return (cmd_attach_session(cmdq, newname, 94 args_has(args, 'D'), 0, NULL)); 95 } 96 cmdq_error(cmdq, "duplicate session: %s", newname); 97 return (CMD_RETURN_ERROR); 98 } 99 } 100 101 target = args_get(args, 't'); 102 if (target != NULL) { 103 groupwith = cmd_find_session(cmdq, target, 0); 104 if (groupwith == NULL) 105 return (CMD_RETURN_ERROR); 106 } else 107 groupwith = NULL; 108 109 /* Set -d if no client. */ 110 detached = args_has(args, 'd'); 111 if (c == NULL) 112 detached = 1; 113 114 /* Is this client already attached? */ 115 already_attached = 0; 116 if (c != NULL && c->session != NULL) 117 already_attached = 1; 118 119 /* Get the new session working directory. */ 120 if (args_has(args, 'c')) { 121 ft = format_create(); 122 if ((c0 = cmd_find_client(cmdq, NULL, 1)) != NULL) 123 format_client(ft, c0); 124 cp = format_expand(ft, args_get(args, 'c')); 125 format_free(ft); 126 127 if (cp != NULL && *cp != '\0') { 128 fd = open(cp, O_RDONLY|O_DIRECTORY); 129 free(cp); 130 if (fd == -1) { 131 cmdq_error(cmdq, "bad working directory: %s", 132 strerror(errno)); 133 return (CMD_RETURN_ERROR); 134 } 135 } else if (cp != NULL) 136 free(cp); 137 cwd = fd; 138 } else if (c != NULL && c->session == NULL) 139 cwd = c->cwd; 140 else if ((c0 = cmd_current_client(cmdq)) != NULL) 141 cwd = c0->session->cwd; 142 else { 143 fd = open(".", O_RDONLY); 144 cwd = fd; 145 } 146 147 /* 148 * Save the termios settings, part of which is used for new windows in 149 * this session. 150 * 151 * This is read again with tcgetattr() rather than using tty.tio as if 152 * detached, tty_open won't be called. Because of this, it must be done 153 * before opening the terminal as that calls tcsetattr() to prepare for 154 * tmux taking over. 155 */ 156 if (!detached && !already_attached && c->tty.fd != -1) { 157 if (tcgetattr(c->tty.fd, &tio) != 0) 158 fatal("tcgetattr failed"); 159 tiop = &tio; 160 } else 161 tiop = NULL; 162 163 /* Open the terminal if necessary. */ 164 if (!detached && !already_attached) { 165 if (server_client_open(c, &cause) != 0) { 166 cmdq_error(cmdq, "open terminal failed: %s", cause); 167 free(cause); 168 goto error; 169 } 170 } 171 172 /* Find new session size. */ 173 if (c != NULL) { 174 sx = c->tty.sx; 175 sy = c->tty.sy; 176 } else { 177 sx = 80; 178 sy = 24; 179 } 180 if (detached && args_has(args, 'x')) { 181 sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr); 182 if (errstr != NULL) { 183 cmdq_error(cmdq, "width %s", errstr); 184 goto error; 185 } 186 } 187 if (detached && args_has(args, 'y')) { 188 sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr); 189 if (errstr != NULL) { 190 cmdq_error(cmdq, "height %s", errstr); 191 goto error; 192 } 193 } 194 if (sy > 0 && options_get_number(&global_s_options, "status")) 195 sy--; 196 if (sx == 0) 197 sx = 1; 198 if (sy == 0) 199 sy = 1; 200 201 /* Figure out the command for the new window. */ 202 argc = -1; 203 argv = NULL; 204 if (target == NULL && args->argc != 0) { 205 argc = args->argc; 206 argv = args->argv; 207 } else if (target == NULL) { 208 cmd = options_get_string(&global_s_options, "default-command"); 209 if (cmd != NULL && *cmd != '\0') { 210 argc = 1; 211 argv = &cmd; 212 } else { 213 argc = 0; 214 argv = NULL; 215 } 216 } 217 218 path = NULL; 219 if (c != NULL && c->session == NULL) 220 envent = environ_find(&c->environ, "PATH"); 221 else 222 envent = environ_find(&global_environ, "PATH"); 223 if (envent != NULL) 224 path = envent->value; 225 226 /* Construct the environment. */ 227 environ_init(&env); 228 update = options_get_string(&global_s_options, "update-environment"); 229 if (c != NULL) 230 environ_update(update, &c->environ, &env); 231 232 /* Create the new session. */ 233 idx = -1 - options_get_number(&global_s_options, "base-index"); 234 s = session_create(newname, argc, argv, path, cwd, &env, tiop, idx, sx, 235 sy, &cause); 236 if (s == NULL) { 237 cmdq_error(cmdq, "create session failed: %s", cause); 238 free(cause); 239 goto error; 240 } 241 environ_free(&env); 242 243 /* Set the initial window name if one given. */ 244 if (argc >= 0 && args_has(args, 'n')) { 245 w = s->curw->window; 246 window_set_name(w, args_get(args, 'n')); 247 options_set_number(&w->options, "automatic-rename", 0); 248 } 249 250 /* 251 * If a target session is given, this is to be part of a session group, 252 * so add it to the group and synchronize. 253 */ 254 if (groupwith != NULL) { 255 session_group_add(groupwith, s); 256 session_group_synchronize_to(s); 257 session_select(s, RB_ROOT(&s->windows)->idx); 258 } 259 260 /* 261 * Set the client to the new session. If a command client exists, it is 262 * taking this session and needs to get MSG_READY and stay around. 263 */ 264 if (!detached) { 265 if (!already_attached) 266 server_write_ready(c); 267 else if (c->session != NULL) 268 c->last_session = c->session; 269 c->session = s; 270 notify_attached_session_changed(c); 271 session_update_activity(s); 272 server_redraw_client(c); 273 } 274 recalculate_sizes(); 275 server_update_socket(); 276 277 /* 278 * If there are still configuration file errors to display, put the new 279 * session's current window into more mode and display them now. 280 */ 281 if (cfg_finished) 282 cfg_show_causes(s); 283 284 /* Print if requested. */ 285 if (args_has(args, 'P')) { 286 if ((template = args_get(args, 'F')) == NULL) 287 template = NEW_SESSION_TEMPLATE; 288 289 ft = format_create(); 290 if ((c0 = cmd_find_client(cmdq, NULL, 1)) != NULL) 291 format_client(ft, c0); 292 format_session(ft, s); 293 294 cp = format_expand(ft, template); 295 cmdq_print(cmdq, "%s", cp); 296 free(cp); 297 298 format_free(ft); 299 } 300 301 if (!detached) 302 cmdq->client_exit = 0; 303 304 if (fd != -1) 305 close(fd); 306 return (CMD_RETURN_NORMAL); 307 308 error: 309 if (fd != -1) 310 close(fd); 311 return (CMD_RETURN_ERROR); 312 } 313