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/*
libfakechroot -- fake chroot environment
Copyright (c) 2010-2015 Piotr Roszatycki <dexter@debian.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <config.h>
#ifdef HAVE_GETSOCKNAME
#define _GNU_SOURCE
#include <stddef.h>
#include <sys/socket.h>
#ifdef AF_UNIX
#include <sys/un.h>
#include "libfakechroot.h"
#include "strlcpy.h"
#ifdef HAVE_GETSOCKNAME_TYPE_ARG2___SOCKADDR_ARG__
# define SOCKADDR(addr) ((addr).__sockaddr__)
# define SOCKADDR_UN(addr) ((addr).__sockaddr_un__)
#else
# define SOCKADDR(addr) (addr)
# define SOCKADDR_UN(addr) (addr)
#endif
wrapper(getsockname, int, (int s, GETSOCKNAME_TYPE_ARG2(addr), socklen_t * addrlen))
{
int status;
socklen_t origlen = *addrlen;
debug("getsockname(%d, &addr, &addrlen)", s);
status = nextcall(getsockname)(s, addr, addrlen);
if (status == 0 && SOCKADDR(addr)->sa_family == AF_UNIX) {
struct sockaddr_un *addr_un = SOCKADDR_UN(addr);
size_t path_max = origlen - offsetof(struct sockaddr_un, sun_path);
if (path_max > origlen) {
/* underflow, addr does not have space for the path */
return status;
} else if (path_max > sizeof(addr_un->sun_path)) {
path_max = sizeof(addr_un->sun_path);
}
if (addr_un->sun_path && *(addr_un->sun_path)) {
char tmp[FAKECHROOT_PATH_MAX];
strlcpy(tmp, addr_un->sun_path, FAKECHROOT_PATH_MAX);
narrow_chroot_path(tmp);
strlcpy(addr_un->sun_path, tmp, path_max);
*addrlen = SUN_LEN(addr_un);
}
}
return status;
}
#else
typedef int empty_translation_unit;
#endif
#else
typedef int empty_translation_unit;
#endif
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