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/* vdagent.c xorg-client to vdagentd (daemon).
Copyright 2010 Red Hat, Inc.
Red Hat Authors:
Hans de Goede <hdegoede@redhat.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <spice/vd_agent.h>
#include "udscs.h"
#include "vdagentd-proto.h"
#include "vdagentd-proto-strings.h"
#include "vdagent-x11.h"
static int verbose = 0;
static struct vdagent_x11 *x11 = NULL;
static struct udscs_connection *client = NULL;
static FILE *logfile = NULL;
static int quit = 0;
void daemon_read_complete(struct udscs_connection **connp,
struct udscs_message_header *header, uint8_t *data)
{
switch (header->type) {
case VDAGENTD_MONITORS_CONFIG:
vdagent_x11_set_monitor_config(x11, (VDAgentMonitorsConfig *)data);
free(data);
break;
case VDAGENTD_CLIPBOARD_REQUEST:
vdagent_x11_clipboard_request(x11, header->arg1, header->arg2);
free(data);
break;
case VDAGENTD_CLIPBOARD_GRAB:
vdagent_x11_clipboard_grab(x11, header->arg1, (uint32_t *)data,
header->size / sizeof(uint32_t));
free(data);
break;
case VDAGENTD_CLIPBOARD_DATA:
vdagent_x11_clipboard_data(x11, header->arg1, header->arg2,
data, header->size);
/* vdagent_x11_clipboard_data takes ownership of the data (or frees
it immediately) */
break;
case VDAGENTD_CLIPBOARD_RELEASE:
vdagent_x11_clipboard_release(x11, header->arg1);
free(data);
break;
default:
if (verbose)
fprintf(logfile, "Unknown message from vdagentd type: %d\n",
header->type);
free(data);
}
}
static void usage(FILE *fp)
{
fprintf(fp,
"vdagent -- spice agent xorg client\n"
"options:\n"
" -h print this text\n"
" -d log debug messages\n"
" -x don't daemonize (and log to logfile)\n");
}
static void quit_handler(int sig)
{
quit = 1;
}
void daemonize(void)
{
int x, retval = 0;
/* detach from terminal */
switch (fork()) {
case 0:
close(0); close(1); close(2);
setsid();
x = open("/dev/null", O_RDWR); dup(x); dup(x);
break;
case -1:
fprintf(logfile, "fork: %s\n", strerror(errno));
retval = 1;
default:
udscs_destroy_connection(&client);
if (logfile != stderr)
fclose(logfile);
exit(retval);
}
}
int main(int argc, char *argv[])
{
fd_set readfds, writefds;
int c, n, nfds, x11_fd, retval = 0;
int do_daemonize = 1;
char *home, filename[1024];
struct sigaction act;
for (;;) {
if (-1 == (c = getopt(argc, argv, "-dxh")))
break;
switch (c) {
case 'd':
verbose++;
break;
case 'x':
do_daemonize = 0;
break;
case 'h':
usage(stdout);
return 0;
default:
usage(stderr);
return 1;
}
}
memset(&act, 0, sizeof(act));
act.sa_flags = SA_RESTART;
act.sa_handler = quit_handler;
sigaction(SIGINT, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGTERM, &act, NULL);
sigaction(SIGQUIT, &act, NULL);
logfile = stderr;
home = getenv("HOME");
if (home) {
snprintf(filename, sizeof(filename), "%s/.spice-vdagent", home);
n = mkdir(filename, 0755);
snprintf(filename, sizeof(filename), "%s/.spice-vdagent/log", home);
if (do_daemonize) {
logfile = fopen(filename, "w");
if (!logfile) {
fprintf(stderr, "Error opening %s: %s\n", filename,
strerror(errno));
logfile = stderr;
}
}
} else {
fprintf(stderr, "Could not get home directory, logging to stderr\n");
}
client = udscs_connect(VDAGENTD_SOCKET, daemon_read_complete, NULL,
vdagentd_messages, VDAGENTD_NO_MESSAGES,
verbose? logfile:NULL, logfile);
if (!client) {
if (logfile != stderr)
fclose(logfile);
return 1;
}
if (do_daemonize)
daemonize();
x11 = vdagent_x11_create(client, logfile, verbose);
if (!x11) {
udscs_destroy_connection(&client);
if (logfile != stderr)
fclose(logfile);
return 1;
}
while (client && !quit) {
FD_ZERO(&readfds);
FD_ZERO(&writefds);
nfds = udscs_client_fill_fds(client, &readfds, &writefds);
x11_fd = vdagent_x11_get_fd(x11);
FD_SET(x11_fd, &readfds);
if (x11_fd >= nfds)
nfds = x11_fd + 1;
n = select(nfds, &readfds, &writefds, NULL, NULL);
if (n == -1) {
if (errno == EINTR)
continue;
fprintf(logfile, "Fatal error select: %s\n", strerror(errno));
retval = 1;
break;
}
if (FD_ISSET(x11_fd, &readfds))
vdagent_x11_do_read(x11);
udscs_client_handle_fds(&client, &readfds, &writefds);
fflush(logfile);
}
vdagent_x11_destroy(x11);
udscs_destroy_connection(&client);
if (logfile != stderr)
fclose(logfile);
return retval;
}
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