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/* $OpenBSD: server-msg.c,v 1.14 2009/08/13 12:15:45 nicm 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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
void server_msg_command(struct client *, struct msg_command_data *);
void server_msg_identify(struct client *, struct msg_identify_data *, int);
void server_msg_resize(struct client *, struct msg_resize_data *);
void printflike2 server_msg_command_error(struct cmd_ctx *, const char *, ...);
void printflike2 server_msg_command_print(struct cmd_ctx *, const char *, ...);
void printflike2 server_msg_command_info(struct cmd_ctx *, const char *, ...);
int
server_msg_dispatch(struct client *c)
{
struct imsg imsg;
struct msg_command_data commanddata;
struct msg_identify_data identifydata;
struct msg_resize_data resizedata;
struct msg_unlock_data unlockdata;
struct msg_environ_data environdata;
ssize_t n, datalen;
if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
return (-1);
for (;;) {
if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
return (-1);
if (n == 0)
return (0);
datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
if (imsg.hdr.peerid != PROTOCOL_VERSION) {
server_write_client(c, MSG_VERSION, NULL, 0);
c->flags |= CLIENT_BAD;
imsg_free(&imsg);
continue;
}
log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
switch (imsg.hdr.type) {
case MSG_COMMAND:
if (datalen != sizeof commanddata)
fatalx("bad MSG_COMMAND size");
memcpy(&commanddata, imsg.data, sizeof commanddata);
server_msg_command(c, &commanddata);
break;
case MSG_IDENTIFY:
if (datalen != sizeof identifydata)
fatalx("bad MSG_IDENTIFY size");
memcpy(&identifydata, imsg.data, sizeof identifydata);
server_msg_identify(c, &identifydata, imsg.fd);
break;
case MSG_RESIZE:
if (datalen != sizeof resizedata)
fatalx("bad MSG_RESIZE size");
memcpy(&resizedata, imsg.data, sizeof resizedata);
server_msg_resize(c, &resizedata);
break;
case MSG_EXITING:
if (datalen != 0)
fatalx("bad MSG_EXITING size");
c->session = NULL;
tty_close(&c->tty);
server_write_client(c, MSG_EXITED, NULL, 0);
break;
case MSG_UNLOCK:
if (datalen != sizeof unlockdata)
fatalx("bad MSG_UNLOCK size");
memcpy(&unlockdata, imsg.data, sizeof unlockdata);
unlockdata.pass[(sizeof unlockdata.pass) - 1] = '\0';
if (server_unlock(unlockdata.pass) != 0)
server_write_error(c, "bad password");
memset(&unlockdata, 0, sizeof unlockdata);
server_write_client(c, MSG_EXIT, NULL, 0);
break;
case MSG_WAKEUP:
if (datalen != 0)
fatalx("bad MSG_WAKEUP size");
c->flags &= ~CLIENT_SUSPENDED;
tty_start_tty(&c->tty);
server_redraw_client(c);
break;
case MSG_ENVIRON:
if (datalen != sizeof environdata)
fatalx("bad MSG_ENVIRON size");
memcpy(&environdata, imsg.data, sizeof environdata);
environdata.var[(sizeof environdata.var) - 1] = '\0';
if (strchr(environdata.var, '=') != NULL)
environ_put(&c->environ, environdata.var);
break;
default:
fatalx("unexpected message");
}
imsg_free(&imsg);
}
}
void printflike2
server_msg_command_error(struct cmd_ctx *ctx, const char *fmt, ...)
{
struct msg_print_data data;
va_list ap;
va_start(ap, fmt);
xvsnprintf(data.msg, sizeof data.msg, fmt, ap);
va_end(ap);
server_write_client(ctx->cmdclient, MSG_ERROR, &data, sizeof data);
}
void printflike2
server_msg_command_print(struct cmd_ctx *ctx, const char *fmt, ...)
{
struct msg_print_data data;
va_list ap;
va_start(ap, fmt);
xvsnprintf(data.msg, sizeof data.msg, fmt, ap);
va_end(ap);
server_write_client(ctx->cmdclient, MSG_PRINT, &data, sizeof data);
}
void printflike2
server_msg_command_info(struct cmd_ctx *ctx, const char *fmt, ...)
{
struct msg_print_data data;
va_list ap;
if (be_quiet)
return;
va_start(ap, fmt);
xvsnprintf(data.msg, sizeof data.msg, fmt, ap);
va_end(ap);
server_write_client(ctx->cmdclient, MSG_PRINT, &data, sizeof data);
}
void
server_msg_command(struct client *c, struct msg_command_data *data)
{
struct cmd_ctx ctx;
struct cmd_list *cmdlist = NULL;
struct cmd *cmd;
int argc;
char **argv, *cause;
server_activity = time(NULL);
ctx.error = server_msg_command_error;
ctx.print = server_msg_command_print;
ctx.info = server_msg_command_info;
ctx.msgdata = data;
ctx.curclient = NULL;
ctx.cursession = NULL;
ctx.cmdclient = c;
argc = data->argc;
data->argv[(sizeof data->argv) - 1] = '\0';
if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
server_msg_command_error(&ctx, "command too long");
goto error;
}
if (argc == 0) {
argc = 1;
argv = xcalloc(1, sizeof *argv);
*argv = xstrdup("new-session");
}
if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
server_msg_command_error(&ctx, "%s", cause);
cmd_free_argv(argc, argv);
goto error;
}
cmd_free_argv(argc, argv);
if (data->pid != -1) {
TAILQ_FOREACH(cmd, cmdlist, qentry) {
if (cmd->entry->flags & CMD_CANTNEST) {
server_msg_command_error(&ctx,
"sessions should be nested with care. "
"unset $TMUX to force");
goto error;
}
}
}
if (cmd_list_exec(cmdlist, &ctx) != 1)
server_write_client(c, MSG_EXIT, NULL, 0);
cmd_list_free(cmdlist);
return;
error:
if (cmdlist != NULL)
cmd_list_free(cmdlist);
server_write_client(c, MSG_EXIT, NULL, 0);
}
void
server_msg_identify(struct client *c, struct msg_identify_data *data, int fd)
{
c->tty.sx = data->sx;
if (c->tty.sx == 0)
c->tty.sx = 80;
c->tty.sy = data->sy;
if (c->tty.sy == 0)
c->tty.sy = 25;
c->cwd = NULL;
data->cwd[(sizeof data->cwd) - 1] = '\0';
if (*data->cwd != '\0')
c->cwd = xstrdup(data->cwd);
data->tty[(sizeof data->tty) - 1] = '\0';
data->term[(sizeof data->term) - 1] = '\0';
tty_init(&c->tty, fd, data->tty, data->term);
if (data->flags & IDENTIFY_UTF8)
c->tty.flags |= TTY_UTF8;
if (data->flags & IDENTIFY_256COLOURS)
c->tty.term_flags |= TERM_256COLOURS;
else if (data->flags & IDENTIFY_88COLOURS)
c->tty.term_flags |= TERM_88COLOURS;
if (data->flags & IDENTIFY_HASDEFAULTS)
c->tty.term_flags |= TERM_HASDEFAULTS;
c->flags |= CLIENT_TERMINAL;
}
void
server_msg_resize(struct client *c, struct msg_resize_data *data)
{
c->tty.sx = data->sx;
if (c->tty.sx == 0)
c->tty.sx = 80;
c->tty.sy = data->sy;
if (c->tty.sy == 0)
c->tty.sy = 25;
c->tty.cx = UINT_MAX;
c->tty.cy = UINT_MAX;
c->tty.rupper = UINT_MAX;
c->tty.rlower = UINT_MAX;
recalculate_sizes();
/* Always redraw this client. */
server_redraw_client(c);
}
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