1 /* $OpenBSD: cmd-new-session.c,v 1.120 2019/06/03 18:28:37 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:dDEF:n:Ps:t:x:Xy:", 0, -1 }, 43 .usage = "[-AdDEPX] [-c start-directory] [-F format] [-n window-name] " 44 "[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] " 45 "[-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 = self->args; 70 struct client *c = item->client; 71 struct session *s, *as, *groupwith; 72 struct environ *env; 73 struct options *oo; 74 struct termios tio, *tiop; 75 struct session_group *sg; 76 const char *errstr, *template, *group, *prefix, *tmp; 77 char *cause, *cwd = NULL, *cp, *newname = NULL; 78 int detached, already_attached, is_control = 0; 79 u_int sx, sy, dsx, dsy; 80 struct spawn_context sc; 81 enum cmd_retval retval; 82 struct cmd_find_state fs; 83 84 if (self->entry == &cmd_has_session_entry) { 85 /* 86 * cmd_find_target() will fail if the session cannot be found, 87 * so always return success here. 88 */ 89 return (CMD_RETURN_NORMAL); 90 } 91 92 if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) { 93 cmdq_error(item, "command or window name given with target"); 94 return (CMD_RETURN_ERROR); 95 } 96 97 if (args_has(args, 's')) { 98 newname = format_single(item, args_get(args, 's'), c, NULL, 99 NULL, NULL); 100 if (!session_check_name(newname)) { 101 cmdq_error(item, "bad session name: %s", newname); 102 goto fail; 103 } 104 if ((as = session_find(newname)) != NULL) { 105 if (args_has(args, 'A')) { 106 retval = cmd_attach_session(item, 107 newname, args_has(args, 'D'), 108 args_has(args, 'X'), 0, NULL, 109 args_has(args, 'E')); 110 free(newname); 111 return (retval); 112 } 113 cmdq_error(item, "duplicate session: %s", newname); 114 goto fail; 115 } 116 } 117 118 /* Is this going to be part of a session group? */ 119 group = args_get(args, 't'); 120 if (group != NULL) { 121 groupwith = item->target.s; 122 if (groupwith == NULL) { 123 if (!session_check_name(group)) { 124 cmdq_error(item, "bad group name: %s", group); 125 goto fail; 126 } 127 sg = session_group_find(group); 128 } else 129 sg = session_group_contains(groupwith); 130 if (sg != NULL) 131 prefix = sg->name; 132 else if (groupwith != NULL) 133 prefix = groupwith->name; 134 else 135 prefix = group; 136 } else { 137 groupwith = NULL; 138 sg = NULL; 139 prefix = NULL; 140 } 141 142 /* Set -d if no client. */ 143 detached = args_has(args, 'd'); 144 if (c == NULL) 145 detached = 1; 146 else if (c->flags & CLIENT_CONTROL) 147 is_control = 1; 148 149 /* Is this client already attached? */ 150 already_attached = 0; 151 if (c != NULL && c->session != NULL) 152 already_attached = 1; 153 154 /* Get the new session working directory. */ 155 if ((tmp = args_get(args, 'c')) != NULL) 156 cwd = format_single(item, tmp, c, NULL, NULL, NULL); 157 else 158 cwd = xstrdup(server_client_get_cwd(c, NULL)); 159 160 /* 161 * If this is a new client, check for nesting and save the termios 162 * settings (part of which is used for new windows in this session). 163 * 164 * tcgetattr() is used rather than using tty.tio since if the client is 165 * detached, tty_open won't be called. It must be done before opening 166 * the terminal as that calls tcsetattr() to prepare for tmux taking 167 * over. 168 */ 169 if (!detached && !already_attached && c->tty.fd != -1) { 170 if (server_client_check_nested(item->client)) { 171 cmdq_error(item, "sessions should be nested with care, " 172 "unset $TMUX to force"); 173 goto fail; 174 } 175 if (tcgetattr(c->tty.fd, &tio) != 0) 176 fatal("tcgetattr failed"); 177 tiop = &tio; 178 } else 179 tiop = NULL; 180 181 /* Open the terminal if necessary. */ 182 if (!detached && !already_attached) { 183 if (server_client_open(c, &cause) != 0) { 184 cmdq_error(item, "open terminal failed: %s", cause); 185 free(cause); 186 goto fail; 187 } 188 } 189 190 /* Get default session size. */ 191 if (args_has(args, 'x')) { 192 tmp = args_get(args, 'x'); 193 if (strcmp(tmp, "-") == 0) { 194 if (c != NULL) 195 dsx = c->tty.sx; 196 else 197 dsx = 80; 198 } else { 199 dsx = strtonum(tmp, 1, USHRT_MAX, &errstr); 200 if (errstr != NULL) { 201 cmdq_error(item, "width %s", errstr); 202 goto fail; 203 } 204 } 205 } 206 if (args_has(args, 'y')) { 207 tmp = args_get(args, 'y'); 208 if (strcmp(tmp, "-") == 0) { 209 if (c != NULL) 210 dsy = c->tty.sy; 211 else 212 dsy = 24; 213 } else { 214 dsy = strtonum(tmp, 1, USHRT_MAX, &errstr); 215 if (errstr != NULL) { 216 cmdq_error(item, "height %s", errstr); 217 goto fail; 218 } 219 } 220 } 221 222 /* Find new session size. */ 223 if (!detached && !is_control) { 224 sx = c->tty.sx; 225 sy = c->tty.sy; 226 if (sy > 0 && options_get_number(global_s_options, "status")) 227 sy--; 228 } else { 229 tmp = options_get_string(global_s_options, "default-size"); 230 if (sscanf(tmp, "%ux%u", &sx, &sy) != 2) { 231 sx = 80; 232 sy = 24; 233 } 234 if (args_has(args, 'x')) 235 sx = dsx; 236 if (args_has(args, 'y')) 237 sy = dsy; 238 } 239 if (sx == 0) 240 sx = 1; 241 if (sy == 0) 242 sy = 1; 243 244 /* Create the new session. */ 245 oo = options_create(global_s_options); 246 if (args_has(args, 'x') || args_has(args, 'y')) { 247 if (!args_has(args, 'x')) 248 dsx = sx; 249 if (!args_has(args, 'y')) 250 dsy = sy; 251 options_set_string(oo, "default-size", 0, "%ux%u", dsx, dsy); 252 } 253 env = environ_create(); 254 if (c != NULL && !args_has(args, 'E')) 255 environ_update(global_s_options, c->environ, env); 256 s = session_create(prefix, newname, cwd, env, oo, tiop); 257 258 /* Spawn the initial window. */ 259 memset(&sc, 0, sizeof sc); 260 sc.item = item; 261 sc.s = s; 262 263 sc.name = args_get(args, 'n'); 264 sc.argc = args->argc; 265 sc.argv = args->argv; 266 267 sc.idx = -1; 268 sc.cwd = args_get(args, 'c'); 269 270 sc.flags = 0; 271 272 if (spawn_window(&sc, &cause) == NULL) { 273 session_destroy(s, 0, __func__); 274 cmdq_error(item, "create window failed: %s", cause); 275 free(cause); 276 goto fail; 277 } 278 279 /* 280 * If a target session is given, this is to be part of a session group, 281 * so add it to the group and synchronize. 282 */ 283 if (group != NULL) { 284 if (sg == NULL) { 285 if (groupwith != NULL) { 286 sg = session_group_new(groupwith->name); 287 session_group_add(sg, groupwith); 288 } else 289 sg = session_group_new(group); 290 } 291 session_group_add(sg, s); 292 session_group_synchronize_to(s); 293 session_select(s, RB_MIN(winlinks, &s->windows)->idx); 294 } 295 notify_session("session-created", s); 296 297 /* 298 * Set the client to the new session. If a command client exists, it is 299 * taking this session and needs to get MSG_READY and stay around. 300 */ 301 if (!detached) { 302 if (!already_attached) { 303 if (~c->flags & CLIENT_CONTROL) 304 proc_send(c->peer, MSG_READY, -1, NULL, 0); 305 } else if (c->session != NULL) 306 c->last_session = c->session; 307 c->session = s; 308 if (~item->shared->flags & CMDQ_SHARED_REPEAT) 309 server_client_set_key_table(c, NULL); 310 tty_update_client_offset(c); 311 status_timer_start(c); 312 notify_client("client-session-changed", c); 313 session_update_activity(s, NULL); 314 gettimeofday(&s->last_attached_time, NULL); 315 server_redraw_client(c); 316 } 317 recalculate_sizes(); 318 server_update_socket(); 319 320 /* 321 * If there are still configuration file errors to display, put the new 322 * session's current window into more mode and display them now. 323 */ 324 if (cfg_finished) 325 cfg_show_causes(s); 326 327 /* Print if requested. */ 328 if (args_has(args, 'P')) { 329 if ((template = args_get(args, 'F')) == NULL) 330 template = NEW_SESSION_TEMPLATE; 331 cp = format_single(item, template, c, s, NULL, NULL); 332 cmdq_print(item, "%s", cp); 333 free(cp); 334 } 335 336 if (!detached) { 337 c->flags |= CLIENT_ATTACHED; 338 cmd_find_from_session(&item->shared->current, s, 0); 339 } 340 341 cmd_find_from_session(&fs, s, 0); 342 cmdq_insert_hook(s, item, &fs, "after-new-session"); 343 344 free(cwd); 345 free(newname); 346 return (CMD_RETURN_NORMAL); 347 348 fail: 349 free(cwd); 350 free(newname); 351 return (CMD_RETURN_ERROR); 352 } 353