tmux/server-fn.c
Nicholas Marriott f0635717b3 Switch tmux to use imsg. This is the last major change to make the
client-server protocol more resilient and make the protocol versioning work
properly. In future, the only things requiring a protocol version bump will be
changes in the message structs, and (when both client and server have this
change) mixing different versions should nicely report an error message.

As a side effect this also makes the code tidier, fixes a problem with the way
errors reported during server startup were handled, and supports fd passing
(which will be used in future).

Looked over by eric@, thanks.

Please note that mixing a client with this change with an older server or vice
versa may cause tmux to crash or hang - tmux should be completely exited before
upgrading.
2009-08-11 17:18:35 +00:00

266 lines
5.5 KiB
C

/* $OpenBSD$ */
/*
* 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 <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
int server_lock_callback(void *, const char *);
void
server_fill_environ(struct session *s, struct environ *env)
{
char tmuxvar[MAXPATHLEN], *term;
u_int idx;
if (session_index(s, &idx) != 0)
fatalx("session not found");
xsnprintf(tmuxvar, sizeof tmuxvar,
"%s,%ld,%u", socket_path, (long) getpid(), idx);
environ_set(env, "TMUX", tmuxvar);
term = options_get_string(&s->options, "default-terminal");
environ_set(env, "TERM", term);
}
void
server_write_error(struct client *c, const char *msg)
{
struct msg_print_data printdata;
strlcpy(printdata.msg, msg, sizeof printdata.msg);
server_write_client(c, MSG_ERROR, &printdata, sizeof printdata);
}
void
server_write_client(
struct client *c, enum msgtype type, const void *buf, size_t len)
{
struct imsgbuf *ibuf = &c->ibuf;
if (c->flags & CLIENT_BAD)
return;
log_debug("writing %d to client %d", type, c->ibuf.fd);
imsg_compose(ibuf, type, PROTOCOL_VERSION, -1, -1, (void *) buf, len);
}
void
server_write_session(
struct session *s, enum msgtype type, const void *buf, size_t len)
{
struct client *c;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (c->session == s)
server_write_client(c, type, buf, len);
}
}
void
server_redraw_client(struct client *c)
{
c->flags |= CLIENT_REDRAW;
}
void
server_status_client(struct client *c)
{
c->flags |= CLIENT_STATUS;
}
void
server_redraw_session(struct session *s)
{
struct client *c;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (c->session == s)
server_redraw_client(c);
}
}
void
server_status_session(struct session *s)
{
struct client *c;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (c->session == s)
server_status_client(c);
}
}
void
server_redraw_window(struct window *w)
{
struct client *c;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (c->session->curw->window == w)
server_redraw_client(c);
}
w->flags |= WINDOW_REDRAW;
}
void
server_status_window(struct window *w)
{
struct session *s;
u_int i;
/*
* This is slightly different. We want to redraw the status line of any
* clients containing this window rather than any where it is the
* current window.
*/
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s != NULL && session_has(s, w))
server_status_session(s);
}
}
void
server_lock(void)
{
struct client *c;
u_int i;
if (server_locked)
return;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
status_prompt_clear(c);
status_prompt_set(c,
"Password: ", server_lock_callback, NULL, c, PROMPT_HIDDEN);
server_redraw_client(c);
}
server_locked = 1;
}
int
server_lock_callback(unused void *data, const char *s)
{
return (server_unlock(s));
}
int
server_unlock(const char *s)
{
struct client *c;
u_int i;
char *out;
if (!server_locked)
return (0);
server_activity = time(NULL);
if (server_password != NULL) {
if (s == NULL)
return (-1);
out = crypt(s, server_password);
if (strcmp(out, server_password) != 0)
goto wrong;
}
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL)
continue;
status_prompt_clear(c);
server_redraw_client(c);
}
server_locked = 0;
password_failures = 0;
return (0);
wrong:
password_failures++;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->prompt_buffer == NULL)
continue;
*c->prompt_buffer = '\0';
c->prompt_index = 0;
server_redraw_client(c);
}
return (-1);
}
void
server_kill_window(struct window *w)
{
struct session *s;
struct winlink *wl;
struct client *c;
u_int i, j;
int destroyed;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s == NULL || !session_has(s, w))
continue;
if ((wl = winlink_find_by_window(&s->windows, w)) == NULL)
continue;
destroyed = session_detach(s, wl);
for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
c = ARRAY_ITEM(&clients, j);
if (c == NULL || c->session != s)
continue;
if (destroyed) {
c->session = NULL;
server_write_client(c, MSG_EXIT, NULL, 0);
} else
server_redraw_client(c);
}
}
recalculate_sizes();
}