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/*
* Copyright (C) 2014-2017 Firejail Authors
*
* This file is part of firejail project
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "faudit.h"
#include <sys/socket.h>
#include <sys/un.h>
// return 0 if the connection is possible
int check_unix(const char *sockfile) {
assert(sockfile);
int rv = -1;
// open socket
int sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock == -1)
return rv;
// connect
struct sockaddr_un remote;
memset(&remote, 0, sizeof(struct sockaddr_un));
remote.sun_family = AF_UNIX;
strncpy(remote.sun_path, sockfile, sizeof(remote.sun_path));
int len = strlen(remote.sun_path) + sizeof(remote.sun_family);
if (*sockfile == '@')
remote.sun_path[0] = '\0';
if (connect(sock, (struct sockaddr *)&remote, len) == 0)
rv = 0;
close(sock);
return rv;
}
void dbus_test(void) {
// check the session bus
char *str = getenv("DBUS_SESSION_BUS_ADDRESS");
if (str) {
int rv = 0;
char *bus = strdup(str);
if (!bus)
errExit("strdup");
char *sockfile;
if ((sockfile = strstr(bus, "unix:abstract=")) != NULL) {
sockfile += 13;
*sockfile = '@';
char *ptr = strchr(sockfile, ',');
if (ptr)
*ptr = '\0';
rv = check_unix(sockfile);
*sockfile = '@';
if (rv == 0)
printf("MAYBE: D-Bus socket %s is available\n", sockfile);
else if (rv == -1)
printf("GOOD: cannot connect to D-Bus socket %s\n", sockfile);
}
else if ((sockfile = strstr(bus, "unix:path=")) != NULL) {
sockfile += 10;
char *ptr = strchr(sockfile, ',');
if (ptr)
*ptr = '\0';
rv = check_unix(sockfile);
if (rv == 0)
printf("MAYBE: D-Bus socket %s is available\n", sockfile);
else if (rv == -1)
printf("GOOD: cannot connect to D-Bus socket %s\n", sockfile);
}
else if ((sockfile = strstr(bus, "tcp:host=")) != NULL)
printf("UGLY: session bus configured for TCP communication.\n");
else
printf("GOOD: cannot find a D-Bus socket\n");
free(bus);
}
else
printf("GOOD: DBUS_SESSION_BUS_ADDRESS environment variable not configured.");
}
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