104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/****************************************************************************
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* apps/fsutils/passwd/passwd_update.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <apps/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 new user to 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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FAR sem_t *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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(void)passwd_unlock(sem);
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return ret;
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}
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