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1014c49881
Track supplementary GIDs per task group, wire setgroups/getgroups syscalls when CONFIG_SCHED_NGROUPS > 0, and honor them in DAC checks via nxsched_has_gid(). When NGROUPS is 0, libc provides getgroups/ setgroups stubs. initgroups() fails instead of silently truncating when membership exceeds CONFIG_SCHED_NGROUPS. Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/****************************************************************************
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* libs/libc/unistd/lib_getgroups.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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: getgroups
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*
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* Description:
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* The getgroups() function returns the supplementary group IDs of the
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* calling process in the array grouplist. Stub when
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* CONFIG_SCHED_USER_IDENTITY is disabled or CONFIG_SCHED_NGROUPS is 0:
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* there is no supplementary group list. The effective group ID is not
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* synthesized; callers that need it should use getegid().
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*
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* Input Parameters:
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* gidsetsize - The number of elements available in grouplist.
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* grouplist - The buffer used to return the group IDs.
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*
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* Returned Value:
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* On success, the number of group IDs is returned. If gidsetsize is zero,
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* the total number of group IDs is returned without modifying grouplist.
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* On failure, -1 is returned and errno is set appropriately.
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*
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****************************************************************************/
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int getgroups(int gidsetsize, gid_t grouplist[])
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{
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UNUSED(grouplist);
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if (gidsetsize < 0)
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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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/* Empty supplementary list (do not synthesize egid). */
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return 0;
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}
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