/*

 * SPDX-License-Identifier: ISC

 *

 * Copyright (c) 2012-2016, 2020, 2022 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 <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifdef HAVE_STDBOOL_H

# include <stdbool.h>

#else

# include "compat/stdbool.h"

#endif /* HAVE_STDBOOL_H */

#define DEFAULT_TEXT_DOMAIN "sudoers"

#include "sudo_compat.h"

#include "sudo_eventlog.h"

#include "sudo_fatal.h"

#include "sudo_gettext.h"

#include "sudoers_debug.h"

#include "defaults.h"

#include "logging.h"

static int current_locale = SUDOERS_LOCALE_USER;

static char *user_locale;

static char *sudoers_locale;

int

sudoers_getlocale(void)

{

    debug_decl(sudoers_getlocale, SUDOERS_DEBUG_UTIL);

    debug_return_int(current_locale);

}

bool

sudoers_initlocale(const char *ulocale, const char *slocale)

{

    debug_decl(sudoers_initlocale, SUDOERS_DEBUG_UTIL);

    if (ulocale != NULL) {

  free(user_locale);

  if ((user_locale = strdup(ulocale)) == NULL)

      debug_return_bool(false);

    }

    if (slocale != NULL) {

  free(sudoers_locale);

  if ((sudoers_locale = strdup(slocale)) == NULL)

      debug_return_bool(false);

    }

    sudo_debug_printf(SUDO_DEBUG_INFO, "%s: user locale %s, sudoers locale %s",

  __func__, user_locale, sudoers_locale);

    debug_return_bool(true);

}

/*

 * Set locale to user or sudoers value.

 * Returns true on success and false on failure,

 * If prev_locale is non-NULL it will be filled in with the

 * old SUDOERS_LOCALE_* value.

 */

bool

sudoers_setlocale(int locale_type, int *prev_locale)

{

    char *res = NULL;

    debug_decl(sudoers_setlocale, SUDOERS_DEBUG_UTIL);

    switch (locale_type) {

  case SUDOERS_LOCALE_USER:

      if (prev_locale)

    *prev_locale = current_locale;

      if (current_locale != SUDOERS_LOCALE_USER) {

    current_locale = SUDOERS_LOCALE_USER;

    sudo_debug_printf(SUDO_DEBUG_DEBUG,

        "%s: setting locale to %s (user)", __func__,

        user_locale ? user_locale : "");

    res = setlocale(LC_ALL, user_locale ? user_locale : "");

    if (res != NULL && user_locale == NULL) {

        user_locale = setlocale(LC_ALL, NULL);

        if (user_locale != NULL)

      user_locale = strdup(user_locale);

        if (user_locale == NULL)

      res = NULL;

    }

      }

      break;

  case SUDOERS_LOCALE_SUDOERS:

      if (prev_locale)

    *prev_locale = current_locale;

      if (current_locale != SUDOERS_LOCALE_SUDOERS) {

    current_locale = SUDOERS_LOCALE_SUDOERS;

    sudo_debug_printf(SUDO_DEBUG_DEBUG,

        "%s: setting locale to %s (sudoers)", __func__,

        sudoers_locale ? sudoers_locale : "C");

    res = setlocale(LC_ALL, sudoers_locale ? sudoers_locale : "C");

    if (res == NULL && sudoers_locale != NULL) {

        if (strcmp(sudoers_locale, "C") != 0) {

      free(sudoers_locale);

      sudoers_locale = strdup("C");

      if (sudoers_locale != NULL)

          res = setlocale(LC_ALL, "C");

        }

    }

      }

      break;

    }

    debug_return_bool(res ? true : false);

}

bool

sudoers_warn_setlocale(bool restore, int *cookie)

{

    debug_decl(sudoers_warn_setlocale, SUDOERS_DEBUG_UTIL);

    if (restore)

  debug_return_bool(sudoers_setlocale(*cookie, NULL));

    debug_return_bool(sudoers_setlocale(SUDOERS_LOCALE_USER, cookie));

}

/*

 * Callback for sudoers_locale sudoers setting.

 */

bool

sudoers_locale_callback(const char *file, int line, int column,

    const union sudo_defs_val *sd_un, int op)

{

    debug_decl(sudoers_locale_callback, SUDOERS_DEBUG_UTIL);

    if (sudoers_initlocale(NULL, sd_un->str)) {

  if (setlocale(LC_ALL, sd_un->str) != NULL)

      debug_return_bool(true);

    }

    debug_return_bool(false);

}