89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/****************************************************************************
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* apps/fsutils/passwd/passwd_update.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 <semaphore.h>
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#include "fsutils/passwd.h"
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#include "passwd.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: passwd_update
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*
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* Description:
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* Change a user in the /etc/passwd file. If the user does not exist,
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* then this function will fail.
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*
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* Input Parameters:
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated errno value is returned on
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* failure.
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*
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****************************************************************************/
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int passwd_update(FAR const char *username, FAR const char *password)
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{
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struct passwd_s passwd;
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PASSWD_SEM_DECL(sem);
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int ret;
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/* Get exclusive access to the /etc/passwd file */
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ret = passwd_lock(&sem);
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if (ret < 0)
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{
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return ret;
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}
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/* Verify that the username exists in the /etc/passwd file */
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ret = passwd_find(username, &passwd);
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if (ret < 0)
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{
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/* The username does not exist in the /etc/passwd file */
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goto errout_with_lock;
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}
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/* Remove the line containing this user from the /etc/passwd file */
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ret = passwd_delete(passwd.offset);
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if (ret < 0)
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{
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goto errout_with_lock;
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}
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/* Then append the new password record to the end of the file */
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ret = passwd_append(username, password);
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errout_with_lock:
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passwd_unlock(sem);
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return ret;
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}
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