77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/****************************************************************************
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* libs/libc/unistd/lib_setregid.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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
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* group 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
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* behavior of setgid(): setgid() should set the real, effective, and
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* saved group ID. Here we depend on it setting only the real group
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* 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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