Annotation of src/usr.bin/tmux/cmd-new-session.c, Revision 1.91
1.91 ! nicm 1: /* $OpenBSD: cmd-new-session.c,v 1.90 2016/10/13 22:48:51 nicm Exp $ */
1.1 nicm 2:
3: /*
1.84 nicm 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 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:
1.88 nicm 36: static 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:
1.88 nicm 66: static 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;
1.86 nicm 71: struct session *s, *as;
1.81 nicm 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;
1.85 nicm 77: const char *path, *cwd, *to_free = NULL;
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;
1.90 nicm 83: struct cmd_find_state fs;
1.62 nicm 84:
85: if (self->entry == &cmd_has_session_entry) {
1.81 nicm 86: /*
87: * cmd_prepare() will fail if the session cannot be found,
88: * hence always return success here.
89: */
1.62 nicm 90: return (CMD_RETURN_NORMAL);
91: }
1.51 nicm 92:
93: if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) {
94: cmdq_error(cmdq, "command or window name given with target");
95: return (CMD_RETURN_ERROR);
96: }
1.34 nicm 97:
98: newname = args_get(args, 's');
1.38 nicm 99: if (newname != NULL) {
100: if (!session_check_name(newname)) {
1.48 nicm 101: cmdq_error(cmdq, "bad session name: %s", newname);
1.45 nicm 102: return (CMD_RETURN_ERROR);
1.38 nicm 103: }
1.86 nicm 104: if ((as = session_find(newname)) != NULL) {
1.49 nicm 105: if (args_has(args, 'A')) {
1.81 nicm 106: /*
107: * This cmdq is now destined for
108: * attach-session. Because attach-session
109: * will have already been prepared, copy this
110: * session into its tflag so it can be used.
111: */
1.86 nicm 112: cmd_find_from_session(&cmdq->state.tflag, as);
1.81 nicm 113: return (cmd_attach_session(cmdq,
1.68 nicm 114: args_has(args, 'D'), 0, NULL,
115: args_has(args, 'E')));
1.49 nicm 116: }
1.48 nicm 117: cmdq_error(cmdq, "duplicate session: %s", newname);
1.45 nicm 118: return (CMD_RETURN_ERROR);
1.38 nicm 119: }
1.4 nicm 120: }
1.1 nicm 121:
1.85 nicm 122: if ((target = args_get(args, 't')) != NULL) {
123: if (groupwith == NULL) {
124: cmdq_error(cmdq, "no such session: %s", target);
125: goto error;
126: }
127: } else
1.34 nicm 128: groupwith = NULL;
1.21 nicm 129:
1.6 nicm 130: /* Set -d if no client. */
1.34 nicm 131: detached = args_has(args, 'd');
1.48 nicm 132: if (c == NULL)
1.6 nicm 133: detached = 1;
134:
1.48 nicm 135: /* Is this client already attached? */
136: already_attached = 0;
137: if (c != NULL && c->session != NULL)
138: already_attached = 1;
139:
1.54 nicm 140: /* Get the new session working directory. */
141: if (args_has(args, 'c')) {
1.79 nicm 142: ft = format_create(cmdq, 0);
1.81 nicm 143: format_defaults(ft, c, NULL, NULL, NULL);
1.76 nicm 144: to_free = cwd = format_expand(ft, args_get(args, 'c'));
1.54 nicm 145: format_free(ft);
1.87 nicm 146: } else if (c != NULL && c->session == NULL && c->cwd != NULL)
1.54 nicm 147: cwd = c->cwd;
1.76 nicm 148: else
149: cwd = ".";
1.54 nicm 150:
1.15 nicm 151: /*
1.67 nicm 152: * If this is a new client, check for nesting and save the termios
153: * settings (part of which is used for new windows in this session).
1.15 nicm 154: *
1.67 nicm 155: * tcgetattr() is used rather than using tty.tio since if the client is
156: * detached, tty_open won't be called. It must be done before opening
157: * the terminal as that calls tcsetattr() to prepare for tmux taking
158: * over.
1.15 nicm 159: */
1.48 nicm 160: if (!detached && !already_attached && c->tty.fd != -1) {
1.67 nicm 161: if (server_client_check_nested(cmdq->client)) {
162: cmdq_error(cmdq, "sessions should be nested with care, "
163: "unset $TMUX to force");
164: return (CMD_RETURN_ERROR);
165: }
1.48 nicm 166: if (tcgetattr(c->tty.fd, &tio) != 0)
1.15 nicm 167: fatal("tcgetattr failed");
1.19 nicm 168: tiop = &tio;
1.15 nicm 169: } else
1.19 nicm 170: tiop = NULL;
1.15 nicm 171:
1.4 nicm 172: /* Open the terminal if necessary. */
1.48 nicm 173: if (!detached && !already_attached) {
1.57 nicm 174: if (server_client_open(c, &cause) != 0) {
1.48 nicm 175: cmdq_error(cmdq, "open terminal failed: %s", cause);
1.44 nicm 176: free(cause);
1.54 nicm 177: goto error;
1.1 nicm 178: }
179: }
180:
1.16 nicm 181: /* Find new session size. */
1.48 nicm 182: if (c != NULL) {
183: sx = c->tty.sx;
184: sy = c->tty.sy;
1.39 nicm 185: } else {
1.4 nicm 186: sx = 80;
1.18 nicm 187: sy = 24;
1.39 nicm 188: }
1.48 nicm 189: if (detached && args_has(args, 'x')) {
190: sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
191: if (errstr != NULL) {
192: cmdq_error(cmdq, "width %s", errstr);
1.54 nicm 193: goto error;
1.35 nicm 194: }
1.48 nicm 195: }
196: if (detached && args_has(args, 'y')) {
197: sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
198: if (errstr != NULL) {
199: cmdq_error(cmdq, "height %s", errstr);
1.54 nicm 200: goto error;
1.35 nicm 201: }
1.1 nicm 202: }
1.74 nicm 203: if (sy > 0 && options_get_number(global_s_options, "status"))
1.4 nicm 204: sy--;
205: if (sx == 0)
206: sx = 1;
207: if (sy == 0)
208: sy = 1;
1.16 nicm 209:
210: /* Figure out the command for the new window. */
1.60 nicm 211: argc = -1;
212: argv = NULL;
1.81 nicm 213: if (!args_has(args, 't') && args->argc != 0) {
1.60 nicm 214: argc = args->argc;
215: argv = args->argv;
1.85 nicm 216: } else if (groupwith == NULL) {
1.74 nicm 217: cmd = options_get_string(global_s_options, "default-command");
1.60 nicm 218: if (cmd != NULL && *cmd != '\0') {
219: argc = 1;
220: argv = &cmd;
221: } else {
222: argc = 0;
223: argv = NULL;
224: }
225: }
1.1 nicm 226:
1.59 nicm 227: path = NULL;
228: if (c != NULL && c->session == NULL)
1.75 nicm 229: envent = environ_find(c->environ, "PATH");
1.59 nicm 230: else
1.75 nicm 231: envent = environ_find(global_environ, "PATH");
1.59 nicm 232: if (envent != NULL)
233: path = envent->value;
234:
1.10 nicm 235: /* Construct the environment. */
1.75 nicm 236: env = environ_create();
1.68 nicm 237: if (c != NULL && !args_has(args, 'E')) {
1.74 nicm 238: update = options_get_string(global_s_options,
1.68 nicm 239: "update-environment");
1.75 nicm 240: environ_update(update, c->environ, env);
1.68 nicm 241: }
1.11 nicm 242:
1.4 nicm 243: /* Create the new session. */
1.74 nicm 244: idx = -1 - options_get_number(global_s_options, "base-index");
1.75 nicm 245: s = session_create(newname, argc, argv, path, cwd, env, tiop, idx, sx,
1.60 nicm 246: sy, &cause);
1.75 nicm 247: environ_free(env);
1.1 nicm 248: if (s == NULL) {
1.48 nicm 249: cmdq_error(cmdq, "create session failed: %s", cause);
1.44 nicm 250: free(cause);
1.54 nicm 251: goto error;
1.1 nicm 252: }
1.4 nicm 253:
1.16 nicm 254: /* Set the initial window name if one given. */
1.60 nicm 255: if (argc >= 0 && args_has(args, 'n')) {
1.16 nicm 256: w = s->curw->window;
1.40 nicm 257: window_set_name(w, args_get(args, 'n'));
1.74 nicm 258: options_set_number(w->options, "automatic-rename", 0);
1.21 nicm 259: }
260:
261: /*
262: * If a target session is given, this is to be part of a session group,
263: * so add it to the group and synchronize.
264: */
1.85 nicm 265: if (groupwith != NULL) {
1.21 nicm 266: session_group_add(groupwith, s);
267: session_group_synchronize_to(s);
1.66 nicm 268: session_select(s, RB_MIN(winlinks, &s->windows)->idx);
1.1 nicm 269: }
270:
1.16 nicm 271: /*
272: * Set the client to the new session. If a command client exists, it is
273: * taking this session and needs to get MSG_READY and stay around.
1.4 nicm 274: */
1.25 nicm 275: if (!detached) {
1.73 nicm 276: if (!already_attached) {
277: if (~c->flags & CLIENT_CONTROL)
278: proc_send(c->peer, MSG_READY, -1, NULL, 0);
279: } else if (c->session != NULL)
1.48 nicm 280: c->last_session = c->session;
281: c->session = s;
1.80 nicm 282: server_client_set_key_table(c, NULL);
1.69 nicm 283: status_timer_start(c);
1.48 nicm 284: notify_attached_session_changed(c);
1.70 nicm 285: session_update_activity(s, NULL);
1.71 nicm 286: gettimeofday(&s->last_attached_time, NULL);
1.48 nicm 287: server_redraw_client(c);
1.1 nicm 288: }
289: recalculate_sizes();
1.22 nicm 290: server_update_socket();
1.26 nicm 291:
292: /*
293: * If there are still configuration file errors to display, put the new
294: * session's current window into more mode and display them now.
295: */
1.46 nicm 296: if (cfg_finished)
1.48 nicm 297: cfg_show_causes(s);
1.50 nicm 298:
299: /* Print if requested. */
300: if (args_has(args, 'P')) {
301: if ((template = args_get(args, 'F')) == NULL)
302: template = NEW_SESSION_TEMPLATE;
303:
1.79 nicm 304: ft = format_create(cmdq, 0);
1.81 nicm 305: format_defaults(ft, c, s, NULL, NULL);
1.50 nicm 306:
307: cp = format_expand(ft, template);
308: cmdq_print(cmdq, "%s", cp);
309: free(cp);
310:
311: format_free(ft);
312: }
1.89 nicm 313:
1.48 nicm 314: if (!detached)
1.91 ! nicm 315: c->flags |= CLIENT_ATTACHED;
1.54 nicm 316:
1.76 nicm 317: if (to_free != NULL)
318: free((void *)to_free);
1.90 nicm 319:
320: cmd_find_from_session(&fs, s);
1.91 ! nicm 321: hooks_insert(s->hooks, cmdq, &fs, "after-new-session");
! 322:
1.48 nicm 323: return (CMD_RETURN_NORMAL);
1.54 nicm 324:
325: error:
1.76 nicm 326: if (to_free != NULL)
327: free((void *)to_free);
1.54 nicm 328: return (CMD_RETURN_ERROR);
1.1 nicm 329: }
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