/*

 * SPDX-License-Identifier: ISC

 *

 * Copyright (c) 2009-2021 Todd C. Miller <Todd.Miller@sudo.ws>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

/*

 * This is an open source non-commercial project. Dear PVS-Studio, please check it.

 * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com

 */

#include <config.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <stdio.h>

#include <stdlib.h>

#ifdef HAVE_STDBOOL_H

# include <stdbool.h>

#else

# include "compat/stdbool.h"

#endif

#include "pathnames.h"

#include "sudo_compat.h"

#include "sudo_debug.h"

#include "sudo_util.h"

#include "sudo_iolog.h"

static unsigned int sessid_max = SESSID_MAX;

static mode_t iolog_filemode = S_IRUSR|S_IWUSR;

static mode_t iolog_dirmode = S_IRWXU;

static uid_t iolog_uid = ROOT_UID;

static gid_t iolog_gid = ROOT_GID;

static bool iolog_gid_set;

static bool iolog_docompress;

static bool iolog_doflush;

/*

 * Reset I/O log settings to default values.

 */

void

iolog_set_defaults(void)

{

    sessid_max = SESSID_MAX;

    iolog_filemode = S_IRUSR|S_IWUSR;

    iolog_dirmode = S_IRWXU;

    iolog_uid = ROOT_UID;

    iolog_gid = ROOT_GID;

    iolog_gid_set = false;

    iolog_docompress = false;

    iolog_doflush = false;

}

/*

 * Set max sequence number (aka session ID)

 */

void

iolog_set_maxseq(unsigned int newval)

{

    debug_decl(iolog_set_maxseq, SUDO_DEBUG_UTIL);

    /* Clamp to SESSID_MAX as documented. */

    if (newval > SESSID_MAX)

  newval = SESSID_MAX;

    sessid_max = newval;

    debug_return;

}

/*

 * Set iolog_uid (and iolog_gid if gid not explicitly set).

 */

void

iolog_set_owner(uid_t uid, gid_t gid)

{

    debug_decl(iolog_set_owner, SUDO_DEBUG_UTIL);

    iolog_uid = uid;

    if (!iolog_gid_set)

  iolog_gid = gid;

    debug_return;

}

/*

 * Set iolog_gid.

 */

void

iolog_set_gid(gid_t gid)

{

    debug_decl(iolog_set_gid, SUDO_DEBUG_UTIL);

    iolog_gid = gid;

    iolog_gid_set = true;

    debug_return;

}

/*

 * Set iolog_filemode and iolog_dirmode.

 */

void

iolog_set_mode(mode_t mode)

{

    debug_decl(iolog_set_mode, SUDO_DEBUG_UTIL);

    /* I/O log files must be readable and writable by owner. */

    iolog_filemode = S_IRUSR|S_IWUSR;

    /* Add in group and other read/write if specified. */

    iolog_filemode |= mode & (S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);

    /* For directory mode, add execute bits as needed. */

    iolog_dirmode = iolog_filemode | S_IXUSR;

    if (iolog_dirmode & (S_IRGRP|S_IWGRP))

  iolog_dirmode |= S_IXGRP;

    if (iolog_dirmode & (S_IROTH|S_IWOTH))

  iolog_dirmode |= S_IXOTH;

    debug_return;

}

/*

 * Set iolog_docompress

 */

void

iolog_set_compress(bool newval)

{

    debug_decl(iolog_set_compress, SUDO_DEBUG_UTIL);

    iolog_docompress = newval;

    debug_return;

}

/*

 * Set iolog_doflush

 */

void

iolog_set_flush(bool newval)

{

    debug_decl(iolog_set_flush, SUDO_DEBUG_UTIL);

    iolog_doflush = newval;

    debug_return;

}

/*

 * Getters.

 */

unsigned int

iolog_get_maxseq(void)

{

    return sessid_max;

}

uid_t

iolog_get_uid(void)

{

    return iolog_uid;

}

gid_t

iolog_get_gid(void)

{

    return iolog_gid;

}

mode_t

iolog_get_file_mode(void)

{

    return iolog_filemode;

}

mode_t

iolog_get_dir_mode(void)

{

    return iolog_dirmode;

}

bool

iolog_get_compress(void)

{

    return iolog_docompress;

}

bool

iolog_get_flush(void)

{

    return iolog_doflush;

}