tmux/cmd-new-window.c
Tiago Cunha d637cb33da Sync OpenBSD patchset 181:
Make all messages sent between the client and server fixed size.

This is the first of two changes to make the protocol more resilient and less
sensitive to other changes in the code, particularly with commands. The client
now packs argv into a buffer and sends it to the server for parsing, rather
than doing it itself and sending the parsed command data.

As a side-effect this also removes a lot of now-unused command marshalling
code.

Mixing a server without this change and a client with or vice versa will cause
tmux to hang or crash, please ensure that tmux is entirely killed before
upgrading.
2009-07-28 22:12:16 +00:00

205 lines
4.8 KiB
C

/* $Id: cmd-new-window.c,v 1.36 2009-07-28 22:12:16 tcunha Exp $ */
/*
* 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 <stdlib.h>
#include "tmux.h"
/*
* Create a new window.
*/
int cmd_new_window_parse(struct cmd *, int, char **, char **);
int cmd_new_window_exec(struct cmd *, struct cmd_ctx *);
void cmd_new_window_free(struct cmd *);
void cmd_new_window_init(struct cmd *, int);
size_t cmd_new_window_print(struct cmd *, char *, size_t);
struct cmd_new_window_data {
char *target;
char *name;
char *cmd;
int flag_detached;
int flag_kill;
};
const struct cmd_entry cmd_new_window_entry = {
"new-window", "neww",
"[-dk] [-n window-name] [-t target-window] [command]",
0, 0,
cmd_new_window_init,
cmd_new_window_parse,
cmd_new_window_exec,
cmd_new_window_free,
cmd_new_window_print
};
void
cmd_new_window_init(struct cmd *self, unused int arg)
{
struct cmd_new_window_data *data;
self->data = data = xmalloc(sizeof *data);
data->target = NULL;
data->name = NULL;
data->cmd = NULL;
data->flag_detached = 0;
data->flag_kill = 0;
}
int
cmd_new_window_parse(struct cmd *self, int argc, char **argv, char **cause)
{
struct cmd_new_window_data *data;
int opt;
self->entry->init(self, 0);
data = self->data;
while ((opt = getopt(argc, argv, "dkt:n:")) != -1) {
switch (opt) {
case 'd':
data->flag_detached = 1;
break;
case 'k':
data->flag_kill = 1;
break;
case 't':
if (data->target == NULL)
data->target = xstrdup(optarg);
break;
case 'n':
if (data->name == NULL)
data->name = xstrdup(optarg);
break;
default:
goto usage;
}
}
argc -= optind;
argv += optind;
if (argc != 0 && argc != 1)
goto usage;
if (argc == 1)
data->cmd = xstrdup(argv[0]);
return (0);
usage:
xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
self->entry->free(self);
return (-1);
}
int
cmd_new_window_exec(struct cmd *self, struct cmd_ctx *ctx)
{
struct cmd_new_window_data *data = self->data;
struct session *s;
struct winlink *wl;
char *cmd, *cwd, *cause;
int idx;
if (data == NULL)
return (0);
if ((idx = cmd_find_index(ctx, data->target, &s)) == -2)
return (-1);
wl = NULL;
if (idx != -1)
wl = winlink_find_by_index(&s->windows, idx);
if (wl != NULL) {
if (data->flag_kill) {
/*
* Can't use session_detach as it will destroy session
* if this makes it empty.
*/
session_alert_cancel(s, wl);
winlink_stack_remove(&s->lastw, wl);
winlink_remove(&s->windows, wl);
/* Force select/redraw if current. */
if (wl == s->curw) {
data->flag_detached = 0;
s->curw = NULL;
}
}
}
cmd = data->cmd;
if (cmd == NULL)
cmd = options_get_string(&s->options, "default-command");
if (ctx->cmdclient == NULL || ctx->cmdclient->cwd == NULL)
cwd = options_get_string(&s->options, "default-path");
else
cwd = ctx->cmdclient->cwd;
wl = session_new(s, data->name, cmd, cwd, idx, &cause);
if (wl == NULL) {
ctx->error(ctx, "create window failed: %s", cause);
xfree(cause);
return (-1);
}
if (!data->flag_detached) {
session_select(s, wl->idx);
server_redraw_session(s);
} else
server_status_session(s);
return (0);
}
void
cmd_new_window_free(struct cmd *self)
{
struct cmd_new_window_data *data = self->data;
if (data->target != NULL)
xfree(data->target);
if (data->name != NULL)
xfree(data->name);
if (data->cmd != NULL)
xfree(data->cmd);
xfree(data);
}
size_t
cmd_new_window_print(struct cmd *self, char *buf, size_t len)
{
struct cmd_new_window_data *data = self->data;
size_t off = 0;
off += xsnprintf(buf, len, "%s", self->entry->name);
if (data == NULL)
return (off);
if (off < len && data->flag_detached)
off += xsnprintf(buf + off, len - off, " -d");
if (off < len && data->target != NULL)
off += cmd_prarg(buf + off, len - off, " -t ", data->target);
if (off < len && data->name != NULL)
off += cmd_prarg(buf + off, len - off, " -n ", data->name);
if (off < len && data->cmd != NULL)
off += cmd_prarg(buf + off, len - off, " ", data->cmd);
return (off);
}