/*

 * SPDX-License-Identifier: ISC

 *

 * Copyright (c) 2014-2015 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>

#include "sudoers.h"

static int sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;

static unsigned int sudoers_debug_refcnt;

static const char *const sudoers_subsystem_names[] = {

    "alias",

    "audit",

    "auth",

    "defaults",

    "env",

    "event",

    "ldap",

    "logging",

    "main",

    "match",

    "netif",

    "nss",

    "parser",

    "perms",

    "plugin",

    "rbtree",

    "sssd",

    "util",

    NULL

};

#define NUM_SUBSYSTEMS  (nitems(sudoers_subsystem_names) - 1)

/* Subsystem IDs assigned at registration time. */

unsigned int sudoers_subsystem_ids[NUM_SUBSYSTEMS];

/*

 * Parse the "filename flags,..." debug_flags entry and insert a new

 * sudo_debug_file struct into debug_files.

 */

bool

sudoers_debug_parse_flags(struct sudo_conf_debug_file_list *debug_files,

    const char *entry)

{

    /* Already initialized? */

    if (sudoers_debug_instance != SUDO_DEBUG_INSTANCE_INITIALIZER)

  return true;

    return sudo_debug_parse_flags(debug_files, entry) != -1;

}

/*

 * Register the specified debug files and program with the

 * debug subsystem, freeing the debug list when done.

 * Sets the active debug instance as a side effect.

 */

bool

sudoers_debug_register(const char *program,

    struct sudo_conf_debug_file_list *debug_files)

{

    int instance = sudoers_debug_instance;

    struct sudo_debug_file *debug_file, *debug_next;

    /* Setup debugging if indicated. */

    if (debug_files != NULL && !TAILQ_EMPTY(debug_files)) {

  if (program != NULL) {

      instance = sudo_debug_register(program, sudoers_subsystem_names,

    sudoers_subsystem_ids, debug_files, -1);

  }

  TAILQ_FOREACH_SAFE(debug_file, debug_files, entries, debug_next) {

      TAILQ_REMOVE(debug_files, debug_file, entries);

      free(debug_file->debug_file);

      free(debug_file->debug_flags);

      free(debug_file);

  }

    }

    switch (instance) {

    case SUDO_DEBUG_INSTANCE_ERROR:

  return false;

    case SUDO_DEBUG_INSTANCE_INITIALIZER:

  /* Nothing to do */

  break;

    default:

  /* New debug instance or additional reference on existing one. */

  sudoers_debug_instance = instance;

  sudo_debug_set_active_instance(sudoers_debug_instance);

  sudoers_debug_refcnt++;

  break;

    }

    return true;

}

/*

 * Deregister sudoers_debug_instance if it is registered.

 */

void

sudoers_debug_deregister(void)

{

    debug_decl(sudoers_debug_deregister, SUDOERS_DEBUG_PLUGIN);

    if (sudoers_debug_refcnt != 0) {

  sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);

  if (--sudoers_debug_refcnt == 0) {

      if (sudo_debug_deregister(sudoers_debug_instance) < 1)

    sudoers_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;

  }

    }

}