1 /* $OpenBSD: cmd-new-session.c,v 1.45 2012/07/11 07:10:15 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 <pwd.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <termios.h> 25 #include <unistd.h> 26 27 #include "tmux.h" 28 29 /* 30 * Create a new session and attach to the current terminal unless -d is given. 31 */ 32 33 enum cmd_retval cmd_new_session_check(struct args *); 34 enum cmd_retval cmd_new_session_exec(struct cmd *, struct cmd_ctx *); 35 36 const struct cmd_entry cmd_new_session_entry = { 37 "new-session", "new", 38 "dn:s:t:x:y:", 0, 1, 39 "[-d] [-n window-name] [-s session-name] [-t target-session] " 40 "[-x width] [-y height] [command]", 41 CMD_STARTSERVER|CMD_CANTNEST|CMD_SENDENVIRON, 42 NULL, 43 cmd_new_session_check, 44 cmd_new_session_exec 45 }; 46 47 enum cmd_retval 48 cmd_new_session_check(struct args *args) 49 { 50 if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) 51 return (CMD_RETURN_ERROR); 52 return (CMD_RETURN_NORMAL); 53 } 54 55 enum cmd_retval 56 cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx) 57 { 58 struct args *args = self->args; 59 struct session *s, *old_s, *groupwith; 60 struct window *w; 61 struct window_pane *wp; 62 struct environ env; 63 struct termios tio, *tiop; 64 struct passwd *pw; 65 const char *newname, *target, *update, *cwd, *errstr; 66 char *cmd, *cause; 67 int detached, idx; 68 u_int sx, sy, i; 69 70 newname = args_get(args, 's'); 71 if (newname != NULL) { 72 if (!session_check_name(newname)) { 73 ctx->error(ctx, "bad session name: %s", newname); 74 return (CMD_RETURN_ERROR); 75 } 76 if (session_find(newname) != NULL) { 77 ctx->error(ctx, "duplicate session: %s", newname); 78 return (CMD_RETURN_ERROR); 79 } 80 } 81 82 target = args_get(args, 't'); 83 if (target != NULL) { 84 groupwith = cmd_find_session(ctx, target, 0); 85 if (groupwith == NULL) 86 return (CMD_RETURN_ERROR); 87 } else 88 groupwith = NULL; 89 90 /* 91 * There are three cases: 92 * 93 * 1. If cmdclient is non-NULL, new-session has been called from the 94 * command-line - cmdclient is to become a new attached, interactive 95 * client. Unless -d is given, the terminal must be opened and then 96 * the client sent MSG_READY. 97 * 98 * 2. If cmdclient is NULL, new-session has been called from an 99 * existing client (such as a key binding). 100 * 101 * 3. Both are NULL, the command was in the configuration file. Treat 102 * this as if -d was given even if it was not. 103 * 104 * In all cases, a new additional session needs to be created and 105 * (unless -d) set as the current session for the client. 106 */ 107 108 /* Set -d if no client. */ 109 detached = args_has(args, 'd'); 110 if (ctx->cmdclient == NULL && ctx->curclient == NULL) 111 detached = 1; 112 113 /* 114 * Save the termios settings, part of which is used for new windows in 115 * this session. 116 * 117 * This is read again with tcgetattr() rather than using tty.tio as if 118 * detached, tty_open won't be called. Because of this, it must be done 119 * before opening the terminal as that calls tcsetattr() to prepare for 120 * tmux taking over. 121 */ 122 if (ctx->cmdclient != NULL && ctx->cmdclient->tty.fd != -1) { 123 if (tcgetattr(ctx->cmdclient->tty.fd, &tio) != 0) 124 fatal("tcgetattr failed"); 125 tiop = &tio; 126 } else 127 tiop = NULL; 128 129 /* Open the terminal if necessary. */ 130 if (!detached && ctx->cmdclient != NULL) { 131 if (server_client_open(ctx->cmdclient, NULL, &cause) != 0) { 132 ctx->error(ctx, "open terminal failed: %s", cause); 133 free(cause); 134 return (CMD_RETURN_ERROR); 135 } 136 } 137 138 /* Get the new session working directory. */ 139 if (ctx->cmdclient != NULL && ctx->cmdclient->cwd != NULL) 140 cwd = ctx->cmdclient->cwd; 141 else { 142 pw = getpwuid(getuid()); 143 if (pw->pw_dir != NULL && *pw->pw_dir != '\0') 144 cwd = pw->pw_dir; 145 else 146 cwd = "/"; 147 } 148 149 /* Find new session size. */ 150 if (ctx->cmdclient != NULL) { 151 sx = ctx->cmdclient->tty.sx; 152 sy = ctx->cmdclient->tty.sy; 153 } else if (ctx->curclient != NULL) { 154 sx = ctx->curclient->tty.sx; 155 sy = ctx->curclient->tty.sy; 156 } else { 157 sx = 80; 158 sy = 24; 159 } 160 if (detached) { 161 if (args_has(args, 'x')) { 162 sx = strtonum( 163 args_get(args, 'x'), 1, USHRT_MAX, &errstr); 164 if (errstr != NULL) { 165 ctx->error(ctx, "width %s", errstr); 166 return (CMD_RETURN_ERROR); 167 } 168 } 169 if (args_has(args, 'y')) { 170 sy = strtonum( 171 args_get(args, 'y'), 1, USHRT_MAX, &errstr); 172 if (errstr != NULL) { 173 ctx->error(ctx, "height %s", errstr); 174 return (CMD_RETURN_ERROR); 175 } 176 } 177 } 178 if (sy > 0 && options_get_number(&global_s_options, "status")) 179 sy--; 180 if (sx == 0) 181 sx = 1; 182 if (sy == 0) 183 sy = 1; 184 185 /* Figure out the command for the new window. */ 186 if (target != NULL) 187 cmd = NULL; 188 else if (args->argc != 0) 189 cmd = args->argv[0]; 190 else 191 cmd = options_get_string(&global_s_options, "default-command"); 192 193 /* Construct the environment. */ 194 environ_init(&env); 195 update = options_get_string(&global_s_options, "update-environment"); 196 if (ctx->cmdclient != NULL) 197 environ_update(update, &ctx->cmdclient->environ, &env); 198 199 /* Create the new session. */ 200 idx = -1 - options_get_number(&global_s_options, "base-index"); 201 s = session_create(newname, cmd, cwd, &env, tiop, idx, sx, sy, &cause); 202 if (s == NULL) { 203 ctx->error(ctx, "create session failed: %s", cause); 204 free(cause); 205 return (CMD_RETURN_ERROR); 206 } 207 environ_free(&env); 208 209 /* Set the initial window name if one given. */ 210 if (cmd != NULL && args_has(args, 'n')) { 211 w = s->curw->window; 212 213 window_set_name(w, args_get(args, 'n')); 214 215 options_set_number(&w->options, "automatic-rename", 0); 216 } 217 218 /* 219 * If a target session is given, this is to be part of a session group, 220 * so add it to the group and synchronize. 221 */ 222 if (groupwith != NULL) { 223 session_group_add(groupwith, s); 224 session_group_synchronize_to(s); 225 session_select(s, RB_ROOT(&s->windows)->idx); 226 } 227 228 /* 229 * Set the client to the new session. If a command client exists, it is 230 * taking this session and needs to get MSG_READY and stay around. 231 */ 232 if (!detached) { 233 if (ctx->cmdclient != NULL) { 234 server_write_ready(ctx->cmdclient); 235 236 old_s = ctx->cmdclient->session; 237 if (old_s != NULL) 238 ctx->cmdclient->last_session = old_s; 239 ctx->cmdclient->session = s; 240 notify_attached_session_changed(ctx->cmdclient); 241 session_update_activity(s); 242 server_redraw_client(ctx->cmdclient); 243 } else { 244 old_s = ctx->curclient->session; 245 if (old_s != NULL) 246 ctx->curclient->last_session = old_s; 247 ctx->curclient->session = s; 248 notify_attached_session_changed(ctx->curclient); 249 session_update_activity(s); 250 server_redraw_client(ctx->curclient); 251 } 252 } 253 recalculate_sizes(); 254 server_update_socket(); 255 256 /* 257 * If there are still configuration file errors to display, put the new 258 * session's current window into more mode and display them now. 259 */ 260 if (cfg_finished && !ARRAY_EMPTY(&cfg_causes)) { 261 wp = s->curw->window->active; 262 window_pane_set_mode(wp, &window_copy_mode); 263 window_copy_init_for_output(wp); 264 for (i = 0; i < ARRAY_LENGTH(&cfg_causes); i++) { 265 cause = ARRAY_ITEM(&cfg_causes, i); 266 window_copy_add(wp, "%s", cause); 267 free(cause); 268 } 269 ARRAY_FREE(&cfg_causes); 270 } 271 272 return (detached ? CMD_RETURN_NORMAL : CMD_RETURN_ATTACH); 273 } 274