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/* $Id: cmd-attach-session.c 2665 2012-01-21 19:30:07Z tcunha $ */

/*
* 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 "tmux.h"

/*
* Attach existing session to the current terminal.
*/

int cmd_attach_session_exec(struct cmd *, struct cmd_ctx *);

const struct cmd_entry cmd_attach_session_entry = {
"attach-session", "attach",
"drt:", 0, 0,
"[-dr] " CMD_TARGET_SESSION_USAGE,
CMD_CANTNEST|CMD_STARTSERVER|CMD_SENDENVIRON,
NULL,
NULL,
cmd_attach_session_exec
};

int
cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
{
struct args *args = self->args;
struct session *s;
struct client *c;
const char *update;
char *overrides, *cause;
u_int i;

if (RB_EMPTY(&sessions)) {
ctx->error(ctx, "no sessions");
return (-1);
}

if ((s = cmd_find_session(ctx, args_get(args, 't'), 1)) == NULL)
return (-1);

if (ctx->cmdclient == NULL && ctx->curclient == NULL)
return (0);

if (ctx->cmdclient == NULL) {
if (args_has(self->args, 'd')) {
/*
* Can't use server_write_session in case attaching to
* the same session as currently attached to.
*/
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session != s)
continue;
if (c == ctx->curclient)
continue;
server_write_client(c, MSG_DETACH, NULL, 0);
}
}

ctx->curclient->session = s;
session_update_activity(s);
server_redraw_client(ctx->curclient);
s->curw->flags &= ~WINLINK_ALERTFLAGS;
} else {
if (!(ctx->cmdclient->flags & CLIENT_TERMINAL)) {
ctx->error(ctx, "not a terminal");
return (-1);
}

overrides =
options_get_string(&s->options, "terminal-overrides");
if (tty_open(&ctx->cmdclient->tty, overrides, &cause) != 0) {
ctx->error(ctx, "terminal open failed: %s", cause);
xfree(cause);
return (-1);
}

if (args_has(self->args, 'r'))
ctx->cmdclient->flags |= CLIENT_READONLY;

if (args_has(self->args, 'd'))
server_write_session(s, MSG_DETACH, NULL, 0);

ctx->cmdclient->session = s;
session_update_activity(s);
server_write_client(ctx->cmdclient, MSG_READY, NULL, 0);

update = options_get_string(&s->options, "update-environment");
environ_update(update, &ctx->cmdclient->environ, &s->environ);

server_redraw_client(ctx->cmdclient);
s->curw->flags &= ~WINLINK_ALERTFLAGS;
}
recalculate_sizes();
server_update_socket();

return (1); /* 1 means don't tell command client to exit */
}
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