91 lines
3.4 KiB
C
91 lines
3.4 KiB
C
/****************************************************************************
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* libs/libc/unistd/lib_setregid.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Michael Jung <mijung@gmx.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <unistd.h>
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#include <errno.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: setregid
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*
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* Description:
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* The setregid() function sets the real group ID and/or the effective group
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* ID of the calling task group to rgid and/or egid.
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*
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* Input Parameters:
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* rgid - Real group identity to set. The special value (gid_t)-1
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* indicates that the real group ID should not be changed.
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* rgid - Effective group identity to set. The special value (gid_t)-1
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* indicates that the effective group ID should not be changed.
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*
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* Returned Value:
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* Zero if successful and -1 in case of failure, in which case errno is set
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* appropriately.
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*
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****************************************************************************/
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int setregid(gid_t rgid, gid_t egid)
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{
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int ret = OK;
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if (rgid != (gid_t)-1)
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{
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/* Set the real group ID. CAREFUL: This exploits non-standard behavior
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* of setgid(): setgid() should set the real, effective, and saved
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* group ID. Here we depend on it setting only the real group ID.
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*/
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ret = setgid(rgid);
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}
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if (ret >= 0 && egid != (gid_t)-1)
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{
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/* Set the effective group ID */
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ret = setegid(egid);
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}
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return ret;
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}
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