nuttx/sched/group/group_getgid.c

/****************************************************************************
 * sched/group/group_getgid.c
 *
 *   Copyright (C) 2019 Gregory Nutt. All rights reserved.
 *   Author:  Gregory Nutt <gnutt@nuttx.net>
 *
 * 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.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT OWNER 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
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 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <unistd.h>
#include <errno.h>

#include <sched/sched.h>

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: getgid
 *
 * Description:
 *   The getgid() function will the real group ID of the calling task group.
 *
 * Input Parameters:
 *   None.
 *
 * Returned Value:
 *   The real group ID of the calling task group.
 *
 ****************************************************************************/

gid_t getgid(void)
{
  FAR struct tcb_s *rtcb          = this_task();
  FAR struct task_group_s *rgroup = rtcb->group;

  /* Set the task group's group identity. */

  DEBUGASSERT(rgroup != NULL);
  return rgroup->tg_gid;
}