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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