67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/****************************************************************************
|
|
* libs/libc/unistd/lib_setuid.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: setuid
|
|
*
|
|
* Description:
|
|
* The setuid() function sets the real user ID, effective user ID, and the
|
|
* saved set-user-ID of the calling process to uid, given appropriate
|
|
* privileges.
|
|
*
|
|
* Input Parameters:
|
|
* uid - User identity to set the various process' user ID attributes to.
|
|
*
|
|
* Returned Value:
|
|
* Zero if successful and -1 in case of failure, in which case errno is set
|
|
* appropriately.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int setuid(uid_t uid)
|
|
{
|
|
/* NuttX only supports the user identity 'root' with a uid value of 0. */
|
|
|
|
if (uid == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* All other uid values are considered invalid and not supported by the
|
|
* implementation.
|
|
*/
|
|
|
|
set_errno(EINVAL);
|
|
return -1;
|
|
}
|