1 /* $OpenBSD: cmd-new-session.c,v 1.135 2020/06/01 09:43:01 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 <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 static enum cmd_retval cmd_new_session_exec(struct cmd *, struct cmdq_item *); 37 38 const struct cmd_entry cmd_new_session_entry = { 39 .name = "new-session", 40 .alias = "new", 41 42 .args = { "Ac:dDe:EF:f:n:Ps:t:x:Xy:", 0, -1 }, 43 .usage = "[-AdDEPX] [-c start-directory] [-e environment] [-F format] " 44 "[-f flags] [-n window-name] [-s session-name] " 45 CMD_TARGET_SESSION_USAGE " [-x width] [-y height] [command]", 46 47 .target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL }, 48 49 .flags = CMD_STARTSERVER, 50 .exec = cmd_new_session_exec 51 }; 52 53 const struct cmd_entry cmd_has_session_entry = { 54 .name = "has-session", 55 .alias = "has", 56 57 .args = { "t:", 0, 0 }, 58 .usage = CMD_TARGET_SESSION_USAGE, 59 60 .target = { 't', CMD_FIND_SESSION, 0 }, 61 62 .flags = 0, 63 .exec = cmd_new_session_exec 64 }; 65 66 static enum cmd_retval 67 cmd_new_session_exec(struct cmd *self, struct cmdq_item *item) 68 { 69 struct args *args = cmd_get_args(self); 70 struct cmd_find_state *current = cmdq_get_current(item); 71 struct cmd_find_state *target = cmdq_get_target(item); 72 struct client *c = cmdq_get_client(item); 73 struct session *s, *as, *groupwith = NULL; 74 struct environ *env; 75 struct options *oo; 76 struct termios tio, *tiop; 77 struct session_group *sg = NULL; 78 const char *errstr, *template, *group, *tmp, *add; 79 char *cause, *cwd = NULL, *cp, *newname = NULL; 80 char *name, *prefix = NULL; 81 int detached, already_attached, is_control = 0; 82 u_int sx, sy, dsx, dsy; 83 struct spawn_context sc; 84 enum cmd_retval retval; 85 struct cmd_find_state fs; 86 struct args_value *value; 87 88 if (cmd_get_entry(self) == &cmd_has_session_entry) { 89 /* 90 * cmd_find_target() will fail if the session cannot be found, 91 * so always return success here. 92 */ 93 return (CMD_RETURN_NORMAL); 94 } 95 96 if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) { 97 cmdq_error(item, "command or window name given with target"); 98 return (CMD_RETURN_ERROR); 99 } 100 101 tmp = args_get(args, 's'); 102 if (tmp != NULL) { 103 name = format_single(item, tmp, c, NULL, NULL, NULL); 104 newname = session_check_name(name); 105 free(name); 106 } 107 if (args_has(args, 'A')) { 108 if (newname != NULL) 109 as = session_find(newname); 110 else 111 as = target->s; 112 if (as != NULL) { 113 retval = cmd_attach_session(item, as->name, 114 args_has(args, 'D'), args_has(args, 'X'), 0, NULL, 115 args_has(args, 'E'), args_get(args, 'f')); 116 free(newname); 117 return (retval); 118 } 119 } 120 if (newname != NULL && session_find(newname) != NULL) { 121 cmdq_error(item, "duplicate session: %s", newname); 122 goto fail; 123 } 124 125 /* Is this going to be part of a session group? */ 126 group = args_get(args, 't'); 127 if (group != NULL) { 128 groupwith = target->s; 129 if (groupwith == NULL) 130 sg = session_group_find(group); 131 else 132 sg = session_group_contains(groupwith); 133 if (sg != NULL) 134 prefix = xstrdup(sg->name); 135 else if (groupwith != NULL) 136 prefix = xstrdup(groupwith->name); 137 else 138 prefix = session_check_name(group); 139 } 140 141 /* Set -d if no client. */ 142 detached = args_has(args, 'd'); 143 if (c == NULL) 144 detached = 1; 145 else if (c->flags & CLIENT_CONTROL) 146 is_control = 1; 147 148 /* Is this client already attached? */ 149 already_attached = 0; 150 if (c != NULL && c->session != NULL) 151 already_attached = 1; 152 153 /* Get the new session working directory. */ 154 if ((tmp = args_get(args, 'c')) != NULL) 155 cwd = format_single(item, tmp, c, NULL, NULL, NULL); 156 else 157 cwd = xstrdup(server_client_get_cwd(c, NULL)); 158 159 /* 160 * If this is a new client, check for nesting and save the termios 161 * settings (part of which is used for new windows in this session). 162 * 163 * tcgetattr() is used rather than using tty.tio since if the client is 164 * detached, tty_open won't be called. It must be done before opening 165 * the terminal as that calls tcsetattr() to prepare for tmux taking 166 * over. 167 */ 168 if (!detached && 169 !already_attached && 170 c->fd != -1 && 171 (~c->flags & CLIENT_CONTROL)) { 172 if (server_client_check_nested(cmdq_get_client(item))) { 173 cmdq_error(item, "sessions should be nested with care, " 174 "unset $TMUX to force"); 175 goto fail; 176 } 177 if (tcgetattr(c->fd, &tio) != 0) 178 fatal("tcgetattr failed"); 179 tiop = &tio; 180 } else 181 tiop = NULL; 182 183 /* Open the terminal if necessary. */ 184 if (!detached && !already_attached) { 185 if (server_client_open(c, &cause) != 0) { 186 cmdq_error(item, "open terminal failed: %s", cause); 187 free(cause); 188 goto fail; 189 } 190 } 191 192 /* Get default session size. */ 193 if (args_has(args, 'x')) { 194 tmp = args_get(args, 'x'); 195 if (strcmp(tmp, "-") == 0) { 196 if (c != NULL) 197 dsx = c->tty.sx; 198 else 199 dsx = 80; 200 } else { 201 dsx = strtonum(tmp, 1, USHRT_MAX, &errstr); 202 if (errstr != NULL) { 203 cmdq_error(item, "width %s", errstr); 204 goto fail; 205 } 206 } 207 } else 208 dsx = 80; 209 if (args_has(args, 'y')) { 210 tmp = args_get(args, 'y'); 211 if (strcmp(tmp, "-") == 0) { 212 if (c != NULL) 213 dsy = c->tty.sy; 214 else 215 dsy = 24; 216 } else { 217 dsy = strtonum(tmp, 1, USHRT_MAX, &errstr); 218 if (errstr != NULL) { 219 cmdq_error(item, "height %s", errstr); 220 goto fail; 221 } 222 } 223 } else 224 dsy = 24; 225 226 /* Find new session size. */ 227 if (!detached && !is_control) { 228 sx = c->tty.sx; 229 sy = c->tty.sy; 230 if (sy > 0 && options_get_number(global_s_options, "status")) 231 sy--; 232 } else { 233 tmp = options_get_string(global_s_options, "default-size"); 234 if (sscanf(tmp, "%ux%u", &sx, &sy) != 2) { 235 sx = dsx; 236 sy = dsy; 237 } else { 238 if (args_has(args, 'x')) 239 sx = dsx; 240 if (args_has(args, 'y')) 241 sy = dsy; 242 } 243 } 244 if (sx == 0) 245 sx = 1; 246 if (sy == 0) 247 sy = 1; 248 249 /* Create the new session. */ 250 oo = options_create(global_s_options); 251 if (args_has(args, 'x') || args_has(args, 'y')) { 252 if (!args_has(args, 'x')) 253 dsx = sx; 254 if (!args_has(args, 'y')) 255 dsy = sy; 256 options_set_string(oo, "default-size", 0, "%ux%u", dsx, dsy); 257 } 258 env = environ_create(); 259 if (c != NULL && !args_has(args, 'E')) 260 environ_update(global_s_options, c->environ, env); 261 add = args_first_value(args, 'e', &value); 262 while (add != NULL) { 263 environ_put(env, add, 0); 264 add = args_next_value(&value); 265 } 266 s = session_create(prefix, newname, cwd, env, oo, tiop); 267 268 /* Spawn the initial window. */ 269 memset(&sc, 0, sizeof sc); 270 sc.item = item; 271 sc.s = s; 272 273 sc.name = args_get(args, 'n'); 274 sc.argc = args->argc; 275 sc.argv = args->argv; 276 277 sc.idx = -1; 278 sc.cwd = args_get(args, 'c'); 279 280 sc.flags = 0; 281 282 if (spawn_window(&sc, &cause) == NULL) { 283 session_destroy(s, 0, __func__); 284 cmdq_error(item, "create window failed: %s", cause); 285 free(cause); 286 goto fail; 287 } 288 289 /* 290 * If a target session is given, this is to be part of a session group, 291 * so add it to the group and synchronize. 292 */ 293 if (group != NULL) { 294 if (sg == NULL) { 295 if (groupwith != NULL) { 296 sg = session_group_new(groupwith->name); 297 session_group_add(sg, groupwith); 298 } else 299 sg = session_group_new(group); 300 } 301 session_group_add(sg, s); 302 session_group_synchronize_to(s); 303 session_select(s, RB_MIN(winlinks, &s->windows)->idx); 304 } 305 notify_session("session-created", s); 306 307 /* 308 * Set the client to the new session. If a command client exists, it is 309 * taking this session and needs to get MSG_READY and stay around. 310 */ 311 if (!detached) { 312 if (args_has(args, 'f')) 313 server_client_set_flags(c, args_get(args, 'f')); 314 if (!already_attached) { 315 if (~c->flags & CLIENT_CONTROL) 316 proc_send(c->peer, MSG_READY, -1, NULL, 0); 317 } else if (c->session != NULL) 318 c->last_session = c->session; 319 c->session = s; 320 if (~cmdq_get_flags(item) & CMDQ_STATE_REPEAT) 321 server_client_set_key_table(c, NULL); 322 tty_update_client_offset(c); 323 status_timer_start(c); 324 notify_client("client-session-changed", c); 325 session_update_activity(s, NULL); 326 gettimeofday(&s->last_attached_time, NULL); 327 server_redraw_client(c); 328 } 329 recalculate_sizes(); 330 server_update_socket(); 331 332 /* 333 * If there are still configuration file errors to display, put the new 334 * session's current window into more mode and display them now. 335 */ 336 if (cfg_finished) 337 cfg_show_causes(s); 338 339 /* Print if requested. */ 340 if (args_has(args, 'P')) { 341 if ((template = args_get(args, 'F')) == NULL) 342 template = NEW_SESSION_TEMPLATE; 343 cp = format_single(item, template, c, s, s->curw, NULL); 344 cmdq_print(item, "%s", cp); 345 free(cp); 346 } 347 348 if (!detached) 349 c->flags |= CLIENT_ATTACHED; 350 if (!args_has(args, 'd')) 351 cmd_find_from_session(current, s, 0); 352 353 cmd_find_from_session(&fs, s, 0); 354 cmdq_insert_hook(s, item, &fs, "after-new-session"); 355 356 free(cwd); 357 free(newname); 358 free(prefix); 359 return (CMD_RETURN_NORMAL); 360 361 fail: 362 free(cwd); 363 free(newname); 364 free(prefix); 365 return (CMD_RETURN_ERROR); 366 } 367