cmd-new-session.c - tmux - Rivoreo Source Code Repositories

 /* $OpenBSD$ */

 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include <sys/types.h>

 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
 #include <termios.h>
 #include <unistd.h>

 #include "tmux.h"

 /*
  * Create a new session and attach to the current terminal unless -d is given.
  */

 #define NEW_SESSION_TEMPLATE "#{session_name}:"

 static enum cmd_retval	cmd_new_session_exec(struct cmd *, struct cmdq_item *);

 const struct cmd_entry cmd_new_session_entry = {
 	.name = "new-session",
 	.alias = "new",

 	.args = { "Ac:dDEF:n:Ps:t:x:y:", 0, -1 },
 	.usage = "[-AdDEP] [-c start-directory] [-F format] [-n window-name] "
 		 "[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] "
 		 "[-y height] [command]",

 	.tflag = CMD_SESSION_CANFAIL,

 	.flags = CMD_STARTSERVER,
 	.exec = cmd_new_session_exec
 };

 const struct cmd_entry cmd_has_session_entry = {
 	.name = "has-session",
 	.alias = "has",

 	.args = { "t:", 0, 0 },
 	.usage = CMD_TARGET_SESSION_USAGE,

 	.tflag = CMD_SESSION,

 	.flags = 0,
 	.exec = cmd_new_session_exec
 };

 static enum cmd_retval
 cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = self->args;
 	struct client		*c = item->client;
 	struct session		*s, *as;
 	struct session		*groupwith = item->state.tflag.s;
 	struct window		*w;
 	struct environ		*env;
 	struct termios		 tio, *tiop;
 	const char		*newname, *target, *errstr, *template;
 	const char		*path, *cmd, *cwd, *to_free = NULL;
 	char		       **argv, *cause, *cp;
 	int			 detached, already_attached, idx, argc;
 	u_int			 sx, sy;
 	struct format_tree	*ft;
 	struct environ_entry	*envent;
 	struct cmd_find_state	 fs;

 	if (self->entry == &cmd_has_session_entry) {
 		/*
 		 * cmd_prepare() will fail if the session cannot be found,
 		 * hence always return success here.
 		 */
 		return (CMD_RETURN_NORMAL);
 	}

 	if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) {
 		cmdq_error(item, "command or window name given with target");
 		return (CMD_RETURN_ERROR);
 	}

 	newname = args_get(args, 's');
 	if (newname != NULL) {
 		if (!session_check_name(newname)) {
 			cmdq_error(item, "bad session name: %s", newname);
 			return (CMD_RETURN_ERROR);
 		}
 		if ((as = session_find(newname)) != NULL) {
 			if (args_has(args, 'A')) {
 				/*
 				 * This item is now destined for
 				 * attach-session. Because attach-session will
 				 * have already been prepared, copy this
 				 * session into its tflag so it can be used.
 				 */
 				cmd_find_from_session(&item->state.tflag, as);
 				return (cmd_attach_session(item,
 				    args_has(args, 'D'), 0, NULL,
 				    args_has(args, 'E')));
 			}
 			cmdq_error(item, "duplicate session: %s", newname);
 			return (CMD_RETURN_ERROR);
 		}
 	}

 	if ((target = args_get(args, 't')) != NULL) {
 		if (groupwith == NULL) {
 			cmdq_error(item, "no such session: %s", target);
 			goto error;
 		}
 	} else
 		groupwith = NULL;

 	/* Set -d if no client. */
 	detached = args_has(args, 'd');
 	if (c == NULL)
 		detached = 1;

 	/* Is this client already attached? */
 	already_attached = 0;
 	if (c != NULL && c->session != NULL)
 		already_attached = 1;

 	/* Get the new session working directory. */
 	if (args_has(args, 'c')) {
 		ft = format_create(item, FORMAT_NONE, 0);
 		format_defaults(ft, c, NULL, NULL, NULL);
 		to_free = cwd = format_expand(ft, args_get(args, 'c'));
 		format_free(ft);
 	} else if (c != NULL && c->session == NULL && c->cwd != NULL)
 		cwd = c->cwd;
 	else
 		cwd = ".";

 	/*
 	 * If this is a new client, check for nesting and save the termios
 	 * settings (part of which is used for new windows in this session).
 	 *
 	 * tcgetattr() is used rather than using tty.tio since if the client is
 	 * detached, tty_open won't be called. It must be done before opening
 	 * the terminal as that calls tcsetattr() to prepare for tmux taking
 	 * over.
 	 */
 	if (!detached && !already_attached && c->tty.fd != -1) {
 		if (server_client_check_nested(item->client)) {
 			cmdq_error(item, "sessions should be nested with care, "
 			    "unset $TMUX to force");
 			return (CMD_RETURN_ERROR);
 		}
 		if (tcgetattr(c->tty.fd, &tio) != 0)
 			fatal("tcgetattr failed");
 		tiop = &tio;
 	} else
 		tiop = NULL;

 	/* Open the terminal if necessary. */
 	if (!detached && !already_attached) {
 		if (server_client_open(c, &cause) != 0) {
 			cmdq_error(item, "open terminal failed: %s", cause);
 			free(cause);
 			goto error;
 		}
 	}

 	/* Find new session size. */
 	if (c != NULL) {
 		sx = c->tty.sx;
 		sy = c->tty.sy;
 	} else {
 		sx = 80;
 		sy = 24;
 	}
 	if (detached && args_has(args, 'x')) {
 		sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
 		if (errstr != NULL) {
 			cmdq_error(item, "width %s", errstr);
 			goto error;
 		}
 	}
 	if (detached && args_has(args, 'y')) {
 		sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
 		if (errstr != NULL) {
 			cmdq_error(item, "height %s", errstr);
 			goto error;
 		}
 	}
 	if (sy > 0 && options_get_number(global_s_options, "status"))
 		sy--;
 	if (sx == 0)
 		sx = 1;
 	if (sy == 0)
 		sy = 1;

 	/* Figure out the command for the new window. */
 	argc = -1;
 	argv = NULL;
 	if (!args_has(args, 't') && args->argc != 0) {
 		argc = args->argc;
 		argv = args->argv;
 	} else if (groupwith == NULL) {
 		cmd = options_get_string(global_s_options, "default-command");
 		if (cmd != NULL && *cmd != '\0') {
 			argc = 1;
 			argv = (char **)&cmd;
 		} else {
 			argc = 0;
 			argv = NULL;
 		}
 	}

 	path = NULL;
 	if (c != NULL && c->session == NULL)
 		envent = environ_find(c->environ, "PATH");
 	else
 		envent = environ_find(global_environ, "PATH");
 	if (envent != NULL)
 		path = envent->value;

 	/* Construct the environment. */
 	env = environ_create();
 	if (c != NULL && !args_has(args, 'E'))
 		environ_update(global_s_options, c->environ, env);

 	/* Create the new session. */
 	idx = -1 - options_get_number(global_s_options, "base-index");
 	s = session_create(newname, argc, argv, path, cwd, env, tiop, idx, sx,
 	    sy, &cause);
 	environ_free(env);
 	if (s == NULL) {
 		cmdq_error(item, "create session failed: %s", cause);
 		free(cause);
 		goto error;
 	}

 	/* Set the initial window name if one given. */
 	if (argc >= 0 && args_has(args, 'n')) {
 		w = s->curw->window;
 		window_set_name(w, args_get(args, 'n'));
 		options_set_number(w->options, "automatic-rename", 0);
 	}

 	/*
 	 * If a target session is given, this is to be part of a session group,
 	 * so add it to the group and synchronize.
 	 */
 	if (groupwith != NULL) {
 		session_group_add(groupwith, s);
 		session_group_synchronize_to(s);
 		session_select(s, RB_MIN(winlinks, &s->windows)->idx);
 	}
 	notify_session("session-created", s);

 	/*
 	 * Set the client to the new session. If a command client exists, it is
 	 * taking this session and needs to get MSG_READY and stay around.
 	 */
 	if (!detached) {
 		if (!already_attached) {
 			if (~c->flags & CLIENT_CONTROL)
 				proc_send(c->peer, MSG_READY, -1, NULL, 0);
 		} else if (c->session != NULL)
 			c->last_session = c->session;
 		c->session = s;
 		status_timer_start(c);
 		notify_client("client-session-changed", c);
 		session_update_activity(s, NULL);
 		gettimeofday(&s->last_attached_time, NULL);
 		server_redraw_client(c);
 	}
 	recalculate_sizes();
 	server_update_socket();

 	/*
 	 * If there are still configuration file errors to display, put the new
 	 * session's current window into more mode and display them now.
 	 */
 	if (cfg_finished)
 		cfg_show_causes(s);

 	/* Print if requested. */
 	if (args_has(args, 'P')) {
 		if ((template = args_get(args, 'F')) == NULL)
 			template = NEW_SESSION_TEMPLATE;

 		ft = format_create(item, FORMAT_NONE, 0);
 		format_defaults(ft, c, s, NULL, NULL);

 		cp = format_expand(ft, template);
 		cmdq_print(item, "%s", cp);
 		free(cp);

 		format_free(ft);
 	}

 	if (!detached)
 		c->flags |= CLIENT_ATTACHED;

 	if (to_free != NULL)
 		free((void *)to_free);

 	cmd_find_from_session(&fs, s);
 	hooks_insert(s->hooks, item, &fs, "after-new-session");

 	return (CMD_RETURN_NORMAL);

 error:
 	if (to_free != NULL)
 		free((void *)to_free);
 	return (CMD_RETURN_ERROR);
 }
	/* $OpenBSD$ */

	/*
	* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
	*
	* Permission to use, copy, modify, and distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
	* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
	* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include <sys/types.h>

	#include <errno.h>
	#include <fcntl.h>
	#include <stdlib.h>
	#include <string.h>
	#include <termios.h>
	#include <unistd.h>

	#include "tmux.h"

	/*
	* Create a new session and attach to the current terminal unless -d is given.
	*/

	#define NEW_SESSION_TEMPLATE "#{session_name}:"

	static enum cmd_retval cmd_new_session_exec(struct cmd , struct cmdq_item );

	const struct cmd_entry cmd_new_session_entry = {
	.name = "new-session",
	.alias = "new",

	.args = { "Ac:dDEF:n:Ps:t:x:y:", 0, -1 },
	.usage = "[-AdDEP] [-c start-directory] [-F format] [-n window-name] "
	"[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] "
	"[-y height] [command]",

	.tflag = CMD_SESSION_CANFAIL,

	.flags = CMD_STARTSERVER,
	.exec = cmd_new_session_exec
	};

	const struct cmd_entry cmd_has_session_entry = {
	.name = "has-session",
	.alias = "has",

	.args = { "t:", 0, 0 },
	.usage = CMD_TARGET_SESSION_USAGE,

	.tflag = CMD_SESSION,

	.flags = 0,
	.exec = cmd_new_session_exec
	};

	static enum cmd_retval
	cmd_new_session_exec(struct cmd self, struct cmdq_item item)
	{
	struct args *args = self->args;
	struct client *c = item->client;
	struct session s, as;
	struct session *groupwith = item->state.tflag.s;
	struct window *w;
	struct environ *env;
	struct termios tio, *tiop;
	const char newname, target, errstr, template;
	const char path, cmd, cwd, to_free = NULL;
	char *argv, cause, *cp;
	int detached, already_attached, idx, argc;
	u_int sx, sy;
	struct format_tree *ft;
	struct environ_entry *envent;
	struct cmd_find_state fs;

	if (self->entry == &cmd_has_session_entry) {
	/*
	* cmd_prepare() will fail if the session cannot be found,
	* hence always return success here.
	*/
	return (CMD_RETURN_NORMAL);
	}

	if (args_has(args, 't') && (args->argc != 0 \|\| args_has(args, 'n'))) {
	cmdq_error(item, "command or window name given with target");
	return (CMD_RETURN_ERROR);
	}

	newname = args_get(args, 's');
	if (newname != NULL) {
	if (!session_check_name(newname)) {
	cmdq_error(item, "bad session name: %s", newname);
	return (CMD_RETURN_ERROR);
	}
	if ((as = session_find(newname)) != NULL) {
	if (args_has(args, 'A')) {
	/*
	* This item is now destined for
	* attach-session. Because attach-session will
	* have already been prepared, copy this
	* session into its tflag so it can be used.
	*/
	cmd_find_from_session(&item->state.tflag, as);
	return (cmd_attach_session(item,
	args_has(args, 'D'), 0, NULL,
	args_has(args, 'E')));
	}
	cmdq_error(item, "duplicate session: %s", newname);
	return (CMD_RETURN_ERROR);
	}
	}

	if ((target = args_get(args, 't')) != NULL) {
	if (groupwith == NULL) {
	cmdq_error(item, "no such session: %s", target);
	goto error;
	}
	} else
	groupwith = NULL;

	/* Set -d if no client. */
	detached = args_has(args, 'd');
	if (c == NULL)
	detached = 1;

	/* Is this client already attached? */
	already_attached = 0;
	if (c != NULL && c->session != NULL)
	already_attached = 1;

	/* Get the new session working directory. */
	if (args_has(args, 'c')) {
	ft = format_create(item, FORMAT_NONE, 0);
	format_defaults(ft, c, NULL, NULL, NULL);
	to_free = cwd = format_expand(ft, args_get(args, 'c'));
	format_free(ft);
	} else if (c != NULL && c->session == NULL && c->cwd != NULL)
	cwd = c->cwd;
	else
	cwd = ".";

	/*
	* If this is a new client, check for nesting and save the termios
	* settings (part of which is used for new windows in this session).
	*
	* tcgetattr() is used rather than using tty.tio since if the client is
	* detached, tty_open won't be called. It must be done before opening
	* the terminal as that calls tcsetattr() to prepare for tmux taking
	* over.
	*/
	if (!detached && !already_attached && c->tty.fd != -1) {
	if (server_client_check_nested(item->client)) {
	cmdq_error(item, "sessions should be nested with care, "
	"unset $TMUX to force");
	return (CMD_RETURN_ERROR);
	}
	if (tcgetattr(c->tty.fd, &tio) != 0)
	fatal("tcgetattr failed");
	tiop = &tio;
	} else
	tiop = NULL;

	/* Open the terminal if necessary. */
	if (!detached && !already_attached) {
	if (server_client_open(c, &cause) != 0) {
	cmdq_error(item, "open terminal failed: %s", cause);
	free(cause);
	goto error;
	}
	}

	/* Find new session size. */
	if (c != NULL) {
	sx = c->tty.sx;
	sy = c->tty.sy;
	} else {
	sx = 80;
	sy = 24;
	}
	if (detached && args_has(args, 'x')) {
	sx = strtonum(args_get(args, 'x'), 1, USHRT_MAX, &errstr);
	if (errstr != NULL) {
	cmdq_error(item, "width %s", errstr);
	goto error;
	}
	}
	if (detached && args_has(args, 'y')) {
	sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
	if (errstr != NULL) {
	cmdq_error(item, "height %s", errstr);
	goto error;
	}
	}
	if (sy > 0 && options_get_number(global_s_options, "status"))
	sy--;
	if (sx == 0)
	sx = 1;
	if (sy == 0)
	sy = 1;

	/* Figure out the command for the new window. */
	argc = -1;
	argv = NULL;
	if (!args_has(args, 't') && args->argc != 0) {
	argc = args->argc;
	argv = args->argv;
	} else if (groupwith == NULL) {
	cmd = options_get_string(global_s_options, "default-command");
	if (cmd != NULL && *cmd != '\0') {
	argc = 1;
	argv = (char **)&cmd;
	} else {
	argc = 0;
	argv = NULL;
	}
	}

	path = NULL;
	if (c != NULL && c->session == NULL)
	envent = environ_find(c->environ, "PATH");
	else
	envent = environ_find(global_environ, "PATH");
	if (envent != NULL)
	path = envent->value;

	/* Construct the environment. */
	env = environ_create();
	if (c != NULL && !args_has(args, 'E'))
	environ_update(global_s_options, c->environ, env);

	/* Create the new session. */
	idx = -1 - options_get_number(global_s_options, "base-index");
	s = session_create(newname, argc, argv, path, cwd, env, tiop, idx, sx,
	sy, &cause);
	environ_free(env);
	if (s == NULL) {
	cmdq_error(item, "create session failed: %s", cause);
	free(cause);
	goto error;
	}

	/* Set the initial window name if one given. */
	if (argc >= 0 && args_has(args, 'n')) {
	w = s->curw->window;
	window_set_name(w, args_get(args, 'n'));
	options_set_number(w->options, "automatic-rename", 0);
	}

	/*
	* If a target session is given, this is to be part of a session group,
	* so add it to the group and synchronize.
	*/
	if (groupwith != NULL) {
	session_group_add(groupwith, s);
	session_group_synchronize_to(s);
	session_select(s, RB_MIN(winlinks, &s->windows)->idx);
	}
	notify_session("session-created", s);

	/*
	* Set the client to the new session. If a command client exists, it is
	* taking this session and needs to get MSG_READY and stay around.
	*/
	if (!detached) {
	if (!already_attached) {
	if (~c->flags & CLIENT_CONTROL)
	proc_send(c->peer, MSG_READY, -1, NULL, 0);
	} else if (c->session != NULL)
	c->last_session = c->session;
	c->session = s;
	status_timer_start(c);
	notify_client("client-session-changed", c);
	session_update_activity(s, NULL);
	gettimeofday(&s->last_attached_time, NULL);
	server_redraw_client(c);
	}
	recalculate_sizes();
	server_update_socket();

	/*
	* If there are still configuration file errors to display, put the new
	* session's current window into more mode and display them now.
	*/
	if (cfg_finished)
	cfg_show_causes(s);

	/* Print if requested. */
	if (args_has(args, 'P')) {
	if ((template = args_get(args, 'F')) == NULL)
	template = NEW_SESSION_TEMPLATE;

	ft = format_create(item, FORMAT_NONE, 0);
	format_defaults(ft, c, s, NULL, NULL);

	cp = format_expand(ft, template);
	cmdq_print(item, "%s", cp);
	free(cp);

	format_free(ft);
	}

	if (!detached)
	c->flags \|= CLIENT_ATTACHED;

	if (to_free != NULL)
	free((void *)to_free);

	cmd_find_from_session(&fs, s);
	hooks_insert(s->hooks, item, &fs, "after-new-session");

	return (CMD_RETURN_NORMAL);

	error:
	if (to_free != NULL)
	free((void *)to_free);
	return (CMD_RETURN_ERROR);
	}