tmux/server-fn.c

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/* $Id: server-fn.c,v 1.8 2007-09-29 13:22:15 nicm Exp $ */
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/*
* 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 <unistd.h>
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#include "tmux.h"
/* Find session from sessid. */
struct session *
server_find_sessid(struct sessid *sid, char **cause)
{
struct session *s;
u_int i, n;
if (*sid->name != '\0') {
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sid->name[(sizeof sid->name) - 1] = '\0';
if ((s = session_find(sid->name)) == NULL) {
xasprintf(cause, "session not found: %s", sid->name);
return (NULL);
}
return (s);
}
if (sid->pid != -1) {
if (sid->pid != getpid()) {
xasprintf(cause, "wrong server: %lld", sid->pid);
return (NULL);
}
if (sid->idx > ARRAY_LENGTH(&sessions)) {
xasprintf(cause, "index out of range: %u", sid->idx);
return (NULL);
}
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if ((s = ARRAY_ITEM(&sessions, sid->idx)) == NULL) {
xasprintf(cause, "session doesn't exist: %u", sid->idx);
return (NULL);
}
return (s);
}
s = NULL;
n = 0;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if (ARRAY_ITEM(&sessions, i) != NULL) {
s = ARRAY_ITEM(&sessions, i);
n++;
}
}
if (s == NULL) {
xasprintf(cause, "no sessions");
return (NULL);
}
if (n != 1) {
xasprintf(cause, "multiple sessions and session not specified");
return (NULL);
}
return (s);
}
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/* Write command to a client. */
void
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server_write_client(
struct client *c, enum hdrtype type, const void *buf, size_t len)
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{
struct hdr hdr;
log_debug("writing %d to client %d", type, c->fd);
hdr.type = type;
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hdr.size = len;
buffer_write(c->out, &hdr, sizeof hdr);
if (buf != NULL)
buffer_write(c->out, buf, len);
}
/* Write command to a client with two buffers. */
void
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server_write_client2(struct client *c, enum hdrtype type,
const void *buf1, size_t len1, const void *buf2, size_t len2)
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{
struct hdr hdr;
log_debug("writing %d to client %d", type, c->fd);
hdr.type = type;
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hdr.size = len1 + len2;
buffer_write(c->out, &hdr, sizeof hdr);
if (buf1 != NULL)
buffer_write(c->out, buf1, len1);
if (buf2 != NULL)
buffer_write(c->out, buf2, len2);
}
/* Write command to all clients attached to a specific window. */
void
server_write_clients(
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struct window *w, enum hdrtype type, const void *buf, size_t len)
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{
struct client *c;
struct hdr hdr;
u_int i;
hdr.type = type;
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hdr.size = len;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c != NULL && c->session != NULL) {
if (c->session->window == w) {
log_debug(
"writing %d to clients: %d", type, c->fd);
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buffer_write(c->out, &hdr, sizeof hdr);
if (buf != NULL)
buffer_write(c->out, buf, len);
}
}
}
}
/* Changed client window. */
void
server_window_changed(struct client *c)
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{
struct window *w;
w = c->session->window;
if (c->sx != w->screen.sx || c->sy != w->screen.sy)
window_resize(w, c->sx, c->sy);
server_draw_client(c, 0, c->sy - 1);
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}
/* Draw window on client. */
void
server_draw_client(struct client *c, u_int py_upper, u_int py_lower)
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{
struct hdr hdr;
size_t size;
buffer_ensure(c->out, sizeof hdr);
buffer_add(c->out, sizeof hdr);
size = BUFFER_USED(c->out);
screen_draw(&c->session->window->screen, c->out, py_upper, py_lower);
size = BUFFER_USED(c->out) - size;
log_debug("redrawing screen, %zu bytes", size);
if (size != 0) {
hdr.type = MSG_OUTPUT;
hdr.size = size;
memcpy(
BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
} else
buffer_reverse_add(c->out, sizeof hdr);
}
/* Send error message command to client. */
void
server_write_error(struct client *c, const char *fmt, ...)
{
va_list ap;
char *msg;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
server_write_client(c, MSG_ERROR, msg, strlen(msg));
xfree(msg);
}
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/* Write message command to a client. */
void
server_write_message(struct client *c, const char *fmt, ...)
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{
struct hdr hdr;
va_list ap;
char *msg;
size_t size;
u_int i;
buffer_ensure(c->out, sizeof hdr);
buffer_add(c->out, sizeof hdr);
size = BUFFER_USED(c->out);
input_store_zero(c->out, CODE_CURSOROFF);
input_store_two(c->out, CODE_CURSORMOVE, c->sy, 1);
input_store_one(c->out, CODE_ATTRIBUTES, 2);
input_store16(c->out, 0);
input_store16(c->out, 7);
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
buffer_write(c->out, msg, strlen(msg));
for (i = strlen(msg); i < c->sx; i++)
input_store8(c->out, ' ');
xfree(msg);
size = BUFFER_USED(c->out) - size;
hdr.type = MSG_OUTPUT;
hdr.size = size;
memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
hdr.type = MSG_PAUSE;
hdr.size = 0;
buffer_write(c->out, &hdr, sizeof hdr);
buffer_ensure(c->out, sizeof hdr);
buffer_add(c->out, sizeof hdr);
size = BUFFER_USED(c->out);
screen_draw(&c->session->window->screen, c->out, c->sy - 1, c->sy - 1);
size = BUFFER_USED(c->out) - size;
hdr.type = MSG_OUTPUT;
hdr.size = size;
memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
}