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