Annotation of src/usr.bin/tmux/cmd-new-session.c, Revision 1.83
1.83 ! nicm 1: /* $OpenBSD: cmd-new-session.c,v 1.82 2015/12/13 21:53:57 nicm Exp $ */
1.1 nicm 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:
1.54 nicm 21: #include <errno.h>
22: #include <fcntl.h>
1.35 nicm 23: #include <stdlib.h>
1.11 nicm 24: #include <string.h>
25: #include <termios.h>
1.30 nicm 26: #include <unistd.h>
1.11 nicm 27:
1.1 nicm 28: #include "tmux.h"
29:
30: /*
31: * Create a new session and attach to the current terminal unless -d is given.
32: */
1.63 nicm 33:
34: #define NEW_SESSION_TEMPLATE "#{session_name}:"
1.1 nicm 35:
1.48 nicm 36: enum cmd_retval cmd_new_session_exec(struct cmd *, struct cmd_q *);
1.1 nicm 37:
38: const struct cmd_entry cmd_new_session_entry = {
1.82 nicm 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:
1.83 ! nicm 47: .tflag = CMD_SESSION_CANFAIL,
! 48:
! 49: .flags = CMD_STARTSERVER,
1.82 nicm 50: .exec = cmd_new_session_exec
1.1 nicm 51: };
52:
1.62 nicm 53: const struct cmd_entry cmd_has_session_entry = {
1.82 nicm 54: .name = "has-session",
55: .alias = "has",
56:
57: .args = { "t:", 0, 0 },
58: .usage = CMD_TARGET_SESSION_USAGE,
59:
1.83 ! nicm 60: .tflag = CMD_SESSION,
! 61:
! 62: .flags = 0,
1.82 nicm 63: .exec = cmd_new_session_exec
1.62 nicm 64: };
65:
1.45 nicm 66: enum cmd_retval
1.48 nicm 67: cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 68: {
1.50 nicm 69: struct args *args = self->args;
1.81 nicm 70: struct client *c = cmdq->client;
71: struct session *s, *attach_sess;
72: struct session *groupwith = cmdq->state.tflag.s;
1.50 nicm 73: struct window *w;
1.75 nicm 74: struct environ *env;
1.50 nicm 75: struct termios tio, *tiop;
1.54 nicm 76: const char *newname, *target, *update, *errstr, *template;
1.76 nicm 77: const char *path, *cwd, *to_free;
1.60 nicm 78: char **argv, *cmd, *cause, *cp;
1.76 nicm 79: int detached, already_attached, idx, argc;
1.50 nicm 80: u_int sx, sy;
81: struct format_tree *ft;
1.59 nicm 82: struct environ_entry *envent;
1.62 nicm 83:
84: if (self->entry == &cmd_has_session_entry) {
1.81 nicm 85: /*
86: * cmd_prepare() will fail if the session cannot be found,
87: * hence always return success here.
88: */
1.62 nicm 89: return (CMD_RETURN_NORMAL);
90: }
1.51 nicm 91:
92: if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) {
93: cmdq_error(cmdq, "command or window name given with target");
94: return (CMD_RETURN_ERROR);
95: }
1.34 nicm 96:
97: newname = args_get(args, 's');
1.38 nicm 98: if (newname != NULL) {
99: if (!session_check_name(newname)) {
1.48 nicm 100: cmdq_error(cmdq, "bad session name: %s", newname);
1.45 nicm 101: return (CMD_RETURN_ERROR);
1.38 nicm 102: }
1.81 nicm 103: if ((attach_sess = session_find(newname)) != NULL) {
1.49 nicm 104: if (args_has(args, 'A')) {
1.81 nicm 105: /*
106: * This cmdq is now destined for
107: * attach-session. Because attach-session
108: * will have already been prepared, copy this
109: * session into its tflag so it can be used.
110: */
111: cmdq->state.tflag.s = attach_sess;
112: return (cmd_attach_session(cmdq,
1.68 nicm 113: args_has(args, 'D'), 0, NULL,
114: args_has(args, 'E')));
1.49 nicm 115: }
1.48 nicm 116: cmdq_error(cmdq, "duplicate session: %s", newname);
1.45 nicm 117: return (CMD_RETURN_ERROR);
1.38 nicm 118: }
1.4 nicm 119: }
1.1 nicm 120:
1.81 nicm 121: if ((target = args_get(args, 't')) == NULL)
1.34 nicm 122: groupwith = NULL;
1.21 nicm 123:
1.6 nicm 124: /* Set -d if no client. */
1.34 nicm 125: detached = args_has(args, 'd');
1.48 nicm 126: if (c == NULL)
1.6 nicm 127: detached = 1;
128:
1.48 nicm 129: /* Is this client already attached? */
130: already_attached = 0;
131: if (c != NULL && c->session != NULL)
132: already_attached = 1;
133:
1.54 nicm 134: /* Get the new session working directory. */
1.76 nicm 135: to_free = NULL;
1.54 nicm 136: if (args_has(args, 'c')) {
1.79 nicm 137: ft = format_create(cmdq, 0);
1.81 nicm 138: format_defaults(ft, c, NULL, NULL, NULL);
1.76 nicm 139: to_free = cwd = format_expand(ft, args_get(args, 'c'));
1.54 nicm 140: format_free(ft);
1.55 nicm 141: } else if (c != NULL && c->session == NULL)
1.54 nicm 142: cwd = c->cwd;
1.76 nicm 143: else
144: cwd = ".";
1.54 nicm 145:
1.15 nicm 146: /*
1.67 nicm 147: * If this is a new client, check for nesting and save the termios
148: * settings (part of which is used for new windows in this session).
1.15 nicm 149: *
1.67 nicm 150: * tcgetattr() is used rather than using tty.tio since if the client is
151: * detached, tty_open won't be called. It must be done before opening
152: * the terminal as that calls tcsetattr() to prepare for tmux taking
153: * over.
1.15 nicm 154: */
1.48 nicm 155: if (!detached && !already_attached && c->tty.fd != -1) {
1.67 nicm 156: if (server_client_check_nested(cmdq->client)) {
157: cmdq_error(cmdq, "sessions should be nested with care, "
158: "unset $TMUX to force");
159: return (CMD_RETURN_ERROR);
160: }
1.48 nicm 161: if (tcgetattr(c->tty.fd, &tio) != 0)
1.15 nicm 162: fatal("tcgetattr failed");
1.19 nicm 163: tiop = &tio;
1.15 nicm 164: } else
1.19 nicm 165: tiop = NULL;
1.15 nicm 166:
1.4 nicm 167: /* Open the terminal if necessary. */
1.48 nicm 168: if (!detached && !already_attached) {
1.57 nicm 169: if (server_client_open(c, &cause) != 0) {
1.48 nicm 170: cmdq_error(cmdq, "open terminal failed: %s", cause);
1.44 nicm 171: free(cause);
1.54 nicm 172: goto error;
1.1 nicm 173: }
174: }
175:
1.16 nicm 176: /* Find new session size. */
1.48 nicm 177: if (c != NULL) {
178: sx = c->tty.sx;
179: sy = c->tty.sy;
1.39 nicm 180: } else {
1.4 nicm 181: sx = 80;
1.18 nicm 182: sy = 24;
1.39 nicm 183: }
1.48 nicm 184: if (detached && args_has(args, 'x')) {
185: sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
186: if (errstr != NULL) {
187: cmdq_error(cmdq, "width %s", errstr);
1.54 nicm 188: goto error;
1.35 nicm 189: }
1.48 nicm 190: }
191: if (detached && args_has(args, 'y')) {
192: sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
193: if (errstr != NULL) {
194: cmdq_error(cmdq, "height %s", errstr);
1.54 nicm 195: goto error;
1.35 nicm 196: }
1.1 nicm 197: }
1.74 nicm 198: if (sy > 0 && options_get_number(global_s_options, "status"))
1.4 nicm 199: sy--;
200: if (sx == 0)
201: sx = 1;
202: if (sy == 0)
203: sy = 1;
1.16 nicm 204:
205: /* Figure out the command for the new window. */
1.60 nicm 206: argc = -1;
207: argv = NULL;
1.81 nicm 208: if (!args_has(args, 't') && args->argc != 0) {
1.60 nicm 209: argc = args->argc;
210: argv = args->argv;
211: } else if (target == NULL) {
1.74 nicm 212: cmd = options_get_string(global_s_options, "default-command");
1.60 nicm 213: if (cmd != NULL && *cmd != '\0') {
214: argc = 1;
215: argv = &cmd;
216: } else {
217: argc = 0;
218: argv = NULL;
219: }
220: }
1.1 nicm 221:
1.59 nicm 222: path = NULL;
223: if (c != NULL && c->session == NULL)
1.75 nicm 224: envent = environ_find(c->environ, "PATH");
1.59 nicm 225: else
1.75 nicm 226: envent = environ_find(global_environ, "PATH");
1.59 nicm 227: if (envent != NULL)
228: path = envent->value;
229:
1.10 nicm 230: /* Construct the environment. */
1.75 nicm 231: env = environ_create();
1.68 nicm 232: if (c != NULL && !args_has(args, 'E')) {
1.74 nicm 233: update = options_get_string(global_s_options,
1.68 nicm 234: "update-environment");
1.75 nicm 235: environ_update(update, c->environ, env);
1.68 nicm 236: }
1.11 nicm 237:
1.4 nicm 238: /* Create the new session. */
1.74 nicm 239: idx = -1 - options_get_number(global_s_options, "base-index");
1.75 nicm 240: s = session_create(newname, argc, argv, path, cwd, env, tiop, idx, sx,
1.60 nicm 241: sy, &cause);
1.75 nicm 242: environ_free(env);
1.1 nicm 243: if (s == NULL) {
1.48 nicm 244: cmdq_error(cmdq, "create session failed: %s", cause);
1.44 nicm 245: free(cause);
1.54 nicm 246: goto error;
1.1 nicm 247: }
1.4 nicm 248:
1.16 nicm 249: /* Set the initial window name if one given. */
1.60 nicm 250: if (argc >= 0 && args_has(args, 'n')) {
1.16 nicm 251: w = s->curw->window;
1.40 nicm 252: window_set_name(w, args_get(args, 'n'));
1.74 nicm 253: options_set_number(w->options, "automatic-rename", 0);
1.21 nicm 254: }
255:
256: /*
257: * If a target session is given, this is to be part of a session group,
258: * so add it to the group and synchronize.
259: */
1.81 nicm 260: if (args_has(args, 't')) {
1.21 nicm 261: session_group_add(groupwith, s);
262: session_group_synchronize_to(s);
1.66 nicm 263: session_select(s, RB_MIN(winlinks, &s->windows)->idx);
1.1 nicm 264: }
265:
1.16 nicm 266: /*
267: * Set the client to the new session. If a command client exists, it is
268: * taking this session and needs to get MSG_READY and stay around.
1.4 nicm 269: */
1.25 nicm 270: if (!detached) {
1.73 nicm 271: if (!already_attached) {
272: if (~c->flags & CLIENT_CONTROL)
273: proc_send(c->peer, MSG_READY, -1, NULL, 0);
274: } else if (c->session != NULL)
1.48 nicm 275: c->last_session = c->session;
276: c->session = s;
1.80 nicm 277: server_client_set_key_table(c, NULL);
1.69 nicm 278: status_timer_start(c);
1.48 nicm 279: notify_attached_session_changed(c);
1.70 nicm 280: session_update_activity(s, NULL);
1.71 nicm 281: gettimeofday(&s->last_attached_time, NULL);
1.48 nicm 282: server_redraw_client(c);
1.1 nicm 283: }
284: recalculate_sizes();
1.22 nicm 285: server_update_socket();
1.26 nicm 286:
287: /*
288: * If there are still configuration file errors to display, put the new
289: * session's current window into more mode and display them now.
290: */
1.46 nicm 291: if (cfg_finished)
1.48 nicm 292: cfg_show_causes(s);
1.50 nicm 293:
294: /* Print if requested. */
295: if (args_has(args, 'P')) {
296: if ((template = args_get(args, 'F')) == NULL)
297: template = NEW_SESSION_TEMPLATE;
298:
1.79 nicm 299: ft = format_create(cmdq, 0);
1.81 nicm 300: format_defaults(ft, c, s, NULL, NULL);
1.50 nicm 301:
302: cp = format_expand(ft, template);
303: cmdq_print(cmdq, "%s", cp);
304: free(cp);
305:
306: format_free(ft);
307: }
1.1 nicm 308:
1.48 nicm 309: if (!detached)
310: cmdq->client_exit = 0;
1.54 nicm 311:
1.76 nicm 312: if (to_free != NULL)
313: free((void *)to_free);
1.48 nicm 314: return (CMD_RETURN_NORMAL);
1.54 nicm 315:
316: error:
1.76 nicm 317: if (to_free != NULL)
318: free((void *)to_free);
1.54 nicm 319: return (CMD_RETURN_ERROR);
1.1 nicm 320: }
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