Annotation of embedaddon/tmux/cmd-new-session.c, revision 1.1
1.1 ! misho 1: /* $OpenBSD$ */
! 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:y:", 0, -1 },
! 43: .usage = "[-AdDEP] [-c start-directory] [-F format] [-n window-name] "
! 44: "[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] "
! 45: "[-y height] [command]",
! 46:
! 47: .tflag = CMD_SESSION_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: .tflag = CMD_SESSION,
! 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 window *w;
! 73: struct environ *env;
! 74: struct termios tio, *tiop;
! 75: struct session_group *sg;
! 76: const char *newname, *errstr, *template, *group, *prefix;
! 77: const char *path, *cmd, *cwd, *to_free = NULL;
! 78: char **argv, *cause, *cp;
! 79: int detached, already_attached, idx, argc;
! 80: u_int sx, sy;
! 81: struct environ_entry *envent;
! 82: struct cmd_find_state fs;
! 83:
! 84: if (self->entry == &cmd_has_session_entry) {
! 85: /*
! 86: * cmd_prepare() will fail if the session cannot be found,
! 87: * hence 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: newname = args_get(args, 's');
! 98: if (newname != NULL) {
! 99: if (!session_check_name(newname)) {
! 100: cmdq_error(item, "bad session name: %s", newname);
! 101: return (CMD_RETURN_ERROR);
! 102: }
! 103: if ((as = session_find(newname)) != NULL) {
! 104: if (args_has(args, 'A')) {
! 105: /*
! 106: * This item is now destined for
! 107: * attach-session. Because attach-session will
! 108: * have already been prepared, copy this
! 109: * session into its tflag so it can be used.
! 110: */
! 111: cmd_find_from_session(&item->state.tflag, as);
! 112: return (cmd_attach_session(item,
! 113: args_has(args, 'D'), 0, NULL,
! 114: args_has(args, 'E')));
! 115: }
! 116: cmdq_error(item, "duplicate session: %s", newname);
! 117: return (CMD_RETURN_ERROR);
! 118: }
! 119: }
! 120:
! 121: /* Is this going to be part of a session group? */
! 122: group = args_get(args, 't');
! 123: if (group != NULL) {
! 124: groupwith = item->state.tflag.s;
! 125: if (groupwith == NULL) {
! 126: if (!session_check_name(group)) {
! 127: cmdq_error(item, "bad group name: %s", group);
! 128: goto error;
! 129: }
! 130: sg = session_group_find(group);
! 131: } else
! 132: sg = session_group_contains(groupwith);
! 133: if (sg != NULL)
! 134: prefix = sg->name;
! 135: else if (groupwith != NULL)
! 136: prefix = groupwith->name;
! 137: else
! 138: prefix = group;
! 139: } else {
! 140: groupwith = NULL;
! 141: sg = NULL;
! 142: prefix = NULL;
! 143: }
! 144:
! 145: /* Set -d if no client. */
! 146: detached = args_has(args, 'd');
! 147: if (c == NULL)
! 148: detached = 1;
! 149:
! 150: /* Is this client already attached? */
! 151: already_attached = 0;
! 152: if (c != NULL && c->session != NULL)
! 153: already_attached = 1;
! 154:
! 155: /* Get the new session working directory. */
! 156: if (args_has(args, 'c')) {
! 157: cwd = args_get(args, 'c');
! 158: to_free = cwd = format_single(item, cwd, c, NULL, NULL, NULL);
! 159: } else if (c != NULL && c->session == NULL && c->cwd != NULL)
! 160: cwd = c->cwd;
! 161: else
! 162: cwd = ".";
! 163:
! 164: /*
! 165: * If this is a new client, check for nesting and save the termios
! 166: * settings (part of which is used for new windows in this session).
! 167: *
! 168: * tcgetattr() is used rather than using tty.tio since if the client is
! 169: * detached, tty_open won't be called. It must be done before opening
! 170: * the terminal as that calls tcsetattr() to prepare for tmux taking
! 171: * over.
! 172: */
! 173: if (!detached && !already_attached && c->tty.fd != -1) {
! 174: if (server_client_check_nested(item->client)) {
! 175: cmdq_error(item, "sessions should be nested with care, "
! 176: "unset $TMUX to force");
! 177: return (CMD_RETURN_ERROR);
! 178: }
! 179: if (tcgetattr(c->tty.fd, &tio) != 0)
! 180: fatal("tcgetattr failed");
! 181: tiop = &tio;
! 182: } else
! 183: tiop = NULL;
! 184:
! 185: /* Open the terminal if necessary. */
! 186: if (!detached && !already_attached) {
! 187: if (server_client_open(c, &cause) != 0) {
! 188: cmdq_error(item, "open terminal failed: %s", cause);
! 189: free(cause);
! 190: goto error;
! 191: }
! 192: }
! 193:
! 194: /* Find new session size. */
! 195: if (c != NULL) {
! 196: sx = c->tty.sx;
! 197: sy = c->tty.sy;
! 198: } else {
! 199: sx = 80;
! 200: sy = 24;
! 201: }
! 202: if (detached && args_has(args, 'x')) {
! 203: sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
! 204: if (errstr != NULL) {
! 205: cmdq_error(item, "width %s", errstr);
! 206: goto error;
! 207: }
! 208: }
! 209: if (detached && args_has(args, 'y')) {
! 210: sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
! 211: if (errstr != NULL) {
! 212: cmdq_error(item, "height %s", errstr);
! 213: goto error;
! 214: }
! 215: }
! 216: if (sy > 0 && options_get_number(global_s_options, "status"))
! 217: sy--;
! 218: if (sx == 0)
! 219: sx = 1;
! 220: if (sy == 0)
! 221: sy = 1;
! 222:
! 223: /* Figure out the command for the new window. */
! 224: argc = -1;
! 225: argv = NULL;
! 226: if (!args_has(args, 't') && args->argc != 0) {
! 227: argc = args->argc;
! 228: argv = args->argv;
! 229: } else if (sg == NULL && groupwith == NULL) {
! 230: cmd = options_get_string(global_s_options, "default-command");
! 231: if (cmd != NULL && *cmd != '\0') {
! 232: argc = 1;
! 233: argv = (char **)&cmd;
! 234: } else {
! 235: argc = 0;
! 236: argv = NULL;
! 237: }
! 238: }
! 239:
! 240: path = NULL;
! 241: if (c != NULL && c->session == NULL)
! 242: envent = environ_find(c->environ, "PATH");
! 243: else
! 244: envent = environ_find(global_environ, "PATH");
! 245: if (envent != NULL)
! 246: path = envent->value;
! 247:
! 248: /* Construct the environment. */
! 249: env = environ_create();
! 250: if (c != NULL && !args_has(args, 'E'))
! 251: environ_update(global_s_options, c->environ, env);
! 252:
! 253: /* Create the new session. */
! 254: idx = -1 - options_get_number(global_s_options, "base-index");
! 255: s = session_create(prefix, newname, argc, argv, path, cwd, env, tiop,
! 256: idx, sx, sy, &cause);
! 257: environ_free(env);
! 258: if (s == NULL) {
! 259: cmdq_error(item, "create session failed: %s", cause);
! 260: free(cause);
! 261: goto error;
! 262: }
! 263:
! 264: /* Set the initial window name if one given. */
! 265: if (argc >= 0 && args_has(args, 'n')) {
! 266: w = s->curw->window;
! 267: window_set_name(w, args_get(args, 'n'));
! 268: options_set_number(w->options, "automatic-rename", 0);
! 269: }
! 270:
! 271: /*
! 272: * If a target session is given, this is to be part of a session group,
! 273: * so add it to the group and synchronize.
! 274: */
! 275: if (group != NULL) {
! 276: if (sg == NULL) {
! 277: if (groupwith != NULL) {
! 278: sg = session_group_new(groupwith->name);
! 279: session_group_add(sg, groupwith);
! 280: } else
! 281: sg = session_group_new(group);
! 282: }
! 283: session_group_add(sg, s);
! 284: session_group_synchronize_to(s);
! 285: session_select(s, RB_MIN(winlinks, &s->windows)->idx);
! 286: }
! 287: notify_session("session-created", s);
! 288:
! 289: /*
! 290: * Set the client to the new session. If a command client exists, it is
! 291: * taking this session and needs to get MSG_READY and stay around.
! 292: */
! 293: if (!detached) {
! 294: if (!already_attached) {
! 295: if (~c->flags & CLIENT_CONTROL)
! 296: proc_send(c->peer, MSG_READY, -1, NULL, 0);
! 297: } else if (c->session != NULL)
! 298: c->last_session = c->session;
! 299: c->session = s;
! 300: if (!item->repeat)
! 301: server_client_set_key_table(c, NULL);
! 302: status_timer_start(c);
! 303: notify_client("client-session-changed", c);
! 304: session_update_activity(s, NULL);
! 305: gettimeofday(&s->last_attached_time, NULL);
! 306: server_redraw_client(c);
! 307: }
! 308: recalculate_sizes();
! 309: server_update_socket();
! 310:
! 311: /*
! 312: * If there are still configuration file errors to display, put the new
! 313: * session's current window into more mode and display them now.
! 314: */
! 315: if (cfg_finished)
! 316: cfg_show_causes(s);
! 317:
! 318: /* Print if requested. */
! 319: if (args_has(args, 'P')) {
! 320: if ((template = args_get(args, 'F')) == NULL)
! 321: template = NEW_SESSION_TEMPLATE;
! 322: cp = format_single(item, template, c, s, NULL, NULL);
! 323: cmdq_print(item, "%s", cp);
! 324: free(cp);
! 325: }
! 326:
! 327: if (!detached)
! 328: c->flags |= CLIENT_ATTACHED;
! 329:
! 330: if (to_free != NULL)
! 331: free((void *)to_free);
! 332:
! 333: cmd_find_from_session(&fs, s);
! 334: hooks_insert(s->hooks, item, &fs, "after-new-session");
! 335:
! 336: return (CMD_RETURN_NORMAL);
! 337:
! 338: error:
! 339: if (to_free != NULL)
! 340: free((void *)to_free);
! 341: return (CMD_RETURN_ERROR);
! 342: }
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