/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#ifndef NONETGRAPH
#include <netgraph.h>
#endif
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
#include <sys/linker.h>
#endif
#include <unistd.h>
#ifdef __OpenBSD__
#include <util.h>
#else
#include <libutil.h>
#endif
#include <utmpx.h>
#include "log.h"
#include "main.h"
#include "id.h"
static int uid;
static int euid;
void
ID0init(void)
{
uid = getuid();
euid = geteuid();
}
static void
ID0setuser(void)
{
if (seteuid(uid) == -1) {
log_Printf(LogERROR, "ID0setuser: Unable to seteuid!\n");
AbortProgram(EX_NOPERM);
}
}
uid_t
ID0realuid(void)
{
return uid;
}
static void
ID0set0(void)
{
if (seteuid(euid) == -1) {
log_Printf(LogERROR, "ID0set0: Unable to seteuid!\n");
AbortProgram(EX_NOPERM);
}
}
int
ID0ioctl(int fd, unsigned long req, void *arg)
{
int ret;
ID0set0();
ret = ioctl(fd, req, arg);
log_Printf(LogID0, "%d = ioctl(%d, %lu, %p)\n", ret, fd, req, arg);
ID0setuser();
return ret;
}
int
ID0unlink(const char *name)
{
int ret;
ID0set0();
ret = unlink(name);
log_Printf(LogID0, "%d = unlink(\"%s\")\n", ret, name);
ID0setuser();
return ret;
}
int
ID0socket(int domain, int type, int protocol)
{
int ret;
ID0set0();
ret = socket(domain, type, protocol);
log_Printf(LogID0, "%d = socket(%d, %d, %d)\n", ret, domain, type, protocol);
ID0setuser();
return ret;
}
FILE *
ID0fopen(const char *path, const char *mode)
{
FILE *ret;
ID0set0();
ret = fopen(path, mode);
log_Printf(LogID0, "%p = fopen(\"%s\", \"%s\")\n", ret, path, mode);
ID0setuser();
return ret;
}
int
ID0open(const char *path, int flags, ...)
{
int ret;
va_list ap;
va_start(ap, flags);
ID0set0();
ret = open(path, flags, va_arg(ap, int));
log_Printf(LogID0, "%d = open(\"%s\", %d)\n", ret, path, flags);
ID0setuser();
va_end(ap);
return ret;
}
int
ID0write(int fd, const void *data, size_t len)
{
int ret;
ID0set0();
ret = write(fd, data, len);
log_Printf(LogID0, "%d = write(%d, data, %ld)\n", ret, fd, (long)len);
ID0setuser();
return ret;
}
int
ID0uu_lock(const char *basettyname)
{
int ret;
ID0set0();
ret = uu_lock(basettyname);
log_Printf(LogID0, "%d = uu_lock(\"%s\")\n", ret, basettyname);
ID0setuser();
return ret;
}
int
ID0uu_lock_txfr(const char *basettyname, pid_t newpid)
{
int ret;
ID0set0();
ret = uu_lock_txfr(basettyname, newpid);
log_Printf(LogID0, "%d = uu_lock_txfr(\"%s\", %ld)\n", ret, basettyname,
(long)newpid);
ID0setuser();
return ret;
}
int
ID0uu_unlock(const char *basettyname)
{
int ret;
ID0set0();
ret = uu_unlock(basettyname);
log_Printf(LogID0, "%d = uu_unlock(\"%s\")\n", ret, basettyname);
ID0setuser();
return ret;
}
void
ID0login(const struct utmpx *ut)
{
ID0set0();
pututxline(ut);
log_Printf(LogID0, "pututxline(\"%.*s\", \"%.*s\", \"%.*s\", \"%.*s\")\n",
(int)sizeof ut->ut_id, ut->ut_id,
(int)sizeof ut->ut_user, ut->ut_user,
(int)sizeof ut->ut_line, ut->ut_line,
(int)sizeof ut->ut_host, ut->ut_host);
ID0setuser();
}
void
ID0logout(const struct utmpx *ut)
{
ID0set0();
pututxline(ut);
log_Printf(LogID0, "pututxline(\"%.*s\")\n",
(int)sizeof ut->ut_id, ut->ut_id);
ID0setuser();
}
int
ID0bind_un(int s, const struct sockaddr_un *name)
{
int result;
ID0set0();
result = bind(s, (const struct sockaddr *)name, sizeof *name);
log_Printf(LogID0, "%d = bind(%d, \"%s\", %d)\n",
result, s, name->sun_path, (int)sizeof(*name));
ID0setuser();
return result;
}
int
ID0connect_un(int s, const struct sockaddr_un *name)
{
int result;
ID0set0();
result = connect(s, (const struct sockaddr *)name, sizeof *name);
log_Printf(LogID0, "%d = connect(%d, \"%s\", %d)\n",
result, s, name->sun_path, (int)sizeof(*name));
ID0setuser();
return result;
}
int
ID0kill(pid_t pid, int sig)
{
int result;
ID0set0();
result = kill(pid, sig);
log_Printf(LogID0, "%d = kill(%ld, %d)\n", result, (long)pid, sig);
ID0setuser();
return result;
}
#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
int
ID0kldload(const char *dev)
{
int result;
ID0set0();
result = kldload(dev);
log_Printf(LogID0, "%d = kldload(\"%s\")\n", result, dev);
ID0setuser();
return result;
}
#endif
#ifndef NONETGRAPH
int
ID0NgMkSockNode(const char *name, int *cs, int *ds)
{
int result;
ID0set0();
result = NgMkSockNode(name, cs, ds);
log_Printf(LogID0, "%d = NgMkSockNode(\"%s\", &cs, &ds)\n",
result, name ? name : "");
ID0setuser();
return result;
}
#endif
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