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/*
* Copyright 2004-2005 Timo Hirvonen
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <server.h>
#include <prog.h>
#include <command_mode.h>
#include <debug.h>
#include <unistd.h>
#include <sys/un.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
static struct sockaddr_un addr;
static int remote_socket = -1;
#define MAX_CLIENTS 10
static void read_commands(int fd)
{
char buf[1024];
int pos = 0;
while (1) {
int rc, s;
rc = read(fd, buf + pos, sizeof(buf) - pos);
if (rc == -1) {
break;
}
if (rc == 0) {
break;
}
pos += rc;
s = 0;
while (1) {
int i;
for (i = s; i < pos; i++) {
if (buf[i] == '\n') {
buf[i] = 0;
run_command(buf + s);
s = i + 1;
break;
}
}
if (i == pos)
break;
}
memmove(buf, buf + s, pos - s);
pos -= s;
}
}
int remote_server_serve(void)
{
struct sockaddr saddr;
socklen_t saddr_size = sizeof(saddr);
int fd;
fd = accept(remote_socket, &saddr, &saddr_size);
if (fd == -1) {
return -1;
}
read_commands(fd);
close(fd);
return 0;
}
int remote_server_init(const char *address)
{
/* create socket - domain, type, protocol (IP) */
remote_socket = socket(PF_UNIX, SOCK_STREAM, 0);
if (remote_socket == -1)
die_errno("socket");
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, address, sizeof(addr.sun_path) - 1);
if (bind(remote_socket, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
int sock;
if (errno != EADDRINUSE)
die_errno("bind");
/* address already in use */
/* try to connect to server */
sock = socket(PF_UNIX, SOCK_STREAM, 0);
if (sock == -1)
die_errno("socket");
if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
if (errno != ENOENT && errno != ECONNREFUSED)
die_errno("connect");
close(sock);
/* server not running => dead socket */
/* try to remove dead socket */
if (unlink(addr.sun_path) == -1 && errno != ENOENT)
die_errno("unlink");
if (bind(remote_socket, (struct sockaddr *)&addr, sizeof(addr)) == -1)
die_errno("bind");
} else {
/* server already running */
close(sock);
die("cmus is already listening on socket %s\n", address);
}
}
/* start listening */
BUG_ON(listen(remote_socket, MAX_CLIENTS) == -1);
return remote_socket;
}
void remote_server_exit(void)
{
close(remote_socket);
if (unlink(addr.sun_path) == -1)
d_print("unlink failed\n");
}
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