100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
/****************************************************************************
|
|
* sched/group/group_setgid.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
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include <sched/sched.h>
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: setgid
|
|
*
|
|
* Description:
|
|
* The setgid() function sets the real group ID, effective group ID, and
|
|
* the saved set-group-ID of the calling process to gid, given appropriate
|
|
* privileges.
|
|
*
|
|
* Input Parameters:
|
|
* gid - Identity to set the various process's group ID attributes to.
|
|
*
|
|
* Returned Value:
|
|
* Zero if successful and -1 in case of failure, in which case errno is set
|
|
* to one of he following values:
|
|
*
|
|
* EINVAL - The value of the uid argument is invalid and not supported by
|
|
* the implementation.
|
|
* EPERM - The process does not have appropriate privileges and uid does
|
|
* not match the real group ID or the saved set-group-ID.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int setgid(gid_t gid)
|
|
{
|
|
FAR struct tcb_s *rtcb;
|
|
FAR struct task_group_s *rgroup;
|
|
|
|
/* Verify that the GID is in the valid range of 0 through INT16_MAX.
|
|
* OpenGroup.org does not specify a GID_MAX or GID_MIN. Instead we use a
|
|
* priori knowledge that gid_t is type int16_t.
|
|
*/
|
|
|
|
if ((uint16_t)gid > INT16_MAX)
|
|
{
|
|
set_errno(EINVAL);
|
|
return ERROR;
|
|
}
|
|
|
|
/* Get the currently executing thread's task group. */
|
|
|
|
rtcb = this_task();
|
|
rgroup = rtcb->group;
|
|
|
|
/* Set the task group's group identity. */
|
|
|
|
DEBUGASSERT(rgroup != NULL);
|
|
rgroup->tg_gid = gid;
|
|
return OK;
|
|
}
|