tmux/cmd-new-session.c
Nicholas Marriott f339cfd315 Add -A flag to new-session to make it behave like attach-session if the session
exists. If -A is used, -D behaves like -d to attach-session.
2013-02-24 00:43:28 +00:00

240 lines
6.3 KiB
C

/* $Id$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* 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 <pwd.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.
*/
enum cmd_retval cmd_new_session_check(struct args *);
enum cmd_retval cmd_new_session_exec(struct cmd *, struct cmd_q *);
const struct cmd_entry cmd_new_session_entry = {
"new-session", "new",
"AdDn:s:t:x:y:", 0, 1,
"[-AdD] [-n window-name] [-s session-name] " CMD_TARGET_SESSION_USAGE
" [-x width] [-y height] [command]",
CMD_STARTSERVER|CMD_CANTNEST|CMD_SENDENVIRON,
NULL,
cmd_new_session_check,
cmd_new_session_exec
};
enum cmd_retval
cmd_new_session_check(struct args *args)
{
if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n')))
return (CMD_RETURN_ERROR);
return (CMD_RETURN_NORMAL);
}
enum cmd_retval
cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
{
struct args *args = self->args;
struct client *c = cmdq->client;
struct session *s, *groupwith;
struct window *w;
struct environ env;
struct termios tio, *tiop;
struct passwd *pw;
const char *newname, *target, *update, *cwd, *errstr;
char *cmd, *cause;
int detached, idx;
u_int sx, sy;
int already_attached;
newname = args_get(args, 's');
if (newname != NULL) {
if (!session_check_name(newname)) {
cmdq_error(cmdq, "bad session name: %s", newname);
return (CMD_RETURN_ERROR);
}
if (session_find(newname) != NULL) {
if (args_has(args, 'A')) {
return (cmd_attach_session(cmdq, newname,
args_has(args, 'D'), 0));
}
cmdq_error(cmdq, "duplicate session: %s", newname);
return (CMD_RETURN_ERROR);
}
}
target = args_get(args, 't');
if (target != NULL) {
groupwith = cmd_find_session(cmdq, target, 0);
if (groupwith == NULL)
return (CMD_RETURN_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;
/*
* Save the termios settings, part of which is used for new windows in
* this session.
*
* This is read again with tcgetattr() rather than using tty.tio as if
* detached, tty_open won't be called. Because of this, 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 (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, NULL, &cause) != 0) {
cmdq_error(cmdq, "open terminal failed: %s", cause);
free(cause);
return (CMD_RETURN_ERROR);
}
}
/* Get the new session working directory. */
if (c != NULL && c->cwd != NULL)
cwd = c->cwd;
else {
pw = getpwuid(getuid());
if (pw->pw_dir != NULL && *pw->pw_dir != '\0')
cwd = pw->pw_dir;
else
cwd = "/";
}
/* 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(cmdq, "width %s", errstr);
return (CMD_RETURN_ERROR);
}
}
if (detached && args_has(args, 'y')) {
sy = strtonum(args_get(args, 'y'), 1, USHRT_MAX, &errstr);
if (errstr != NULL) {
cmdq_error(cmdq, "height %s", errstr);
return (CMD_RETURN_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. */
if (target != NULL)
cmd = NULL;
else if (args->argc != 0)
cmd = args->argv[0];
else
cmd = options_get_string(&global_s_options, "default-command");
/* Construct the environment. */
environ_init(&env);
update = options_get_string(&global_s_options, "update-environment");
if (c != NULL)
environ_update(update, &c->environ, &env);
/* Create the new session. */
idx = -1 - options_get_number(&global_s_options, "base-index");
s = session_create(newname, cmd, cwd, &env, tiop, idx, sx, sy, &cause);
if (s == NULL) {
cmdq_error(cmdq, "create session failed: %s", cause);
free(cause);
return (CMD_RETURN_ERROR);
}
environ_free(&env);
/* Set the initial window name if one given. */
if (cmd != NULL && 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_ROOT(&s->windows)->idx);
}
/*
* 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)
server_write_ready(c);
else if (c->session != NULL)
c->last_session = c->session;
c->session = s;
notify_attached_session_changed(c);
session_update_activity(s);
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);
if (!detached)
cmdq->client_exit = 0;
return (CMD_RETURN_NORMAL);
}