* libs/libc/pwd/lib_getpwent.c
*
* SPDX-License-Identifier: Apache-2.0
*
* 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 <string.h>
#include <pwd.h>
#include <errno.h>
#include <nuttx/tls_task.h>
#include "pwd/lib_pwd.h"
* Public Functions
****************************************************************************/
* Name: setpwent
*
* Description:
* The setpwent() function rewinds to the beginning of the password
* database.
*
* Input Parameters:
* None.
*
* Returned Value:
* None
*
****************************************************************************/
void setpwent(void)
{
FAR struct task_info_s *info = task_get_info();
info->ta_passwd_index = 0;
}
* Name: endpwent
*
* Description:
* The endpwent() function is used to close the password database after
* all processing has been performed.
*
* Input Parameters:
* None.
*
* Returned Value:
* None
*
****************************************************************************/
void endpwent(void)
{
FAR struct task_info_s *info = task_get_info();
info->ta_passwd_index = 0;
}
* Name: getpwent
*
* Description:
* The getpwent() function returns a pointer to a structure
* containing the broken-out fields of a record from the password
* database.
*
* Input Parameters:
* None.
*
* Returned Value:
* The getpwent() function returns a pointer to a passwd structure,
* or NULL if there are no more entries or an error occurred. If an
* error occurs, errno is set to indicate the error. If one wants
* to check errno after the call, it should be set to zero before
* the call.
*
****************************************************************************/
FAR struct passwd *getpwent(void)
{
FAR struct task_info_s *info = task_get_info();
FAR struct passwd *pwd;
task_info_init_buffer(info->ta_passwd_buffer, CONFIG_LIBC_PASSWD_LINESIZE);
getpwent_r(&info->ta_passwd, info->ta_passwd_buffer,
CONFIG_LIBC_PASSWD_LINESIZE, &pwd);
return pwd;
}
* Name: getpwent_r
*
* Description:
* The functions getpwent_r() are the reentrant versions of getpwent().
* The former reads the next passwd entry from the stream
* initialized by setpwent().
*
* Input Parameters:
* pwd - contains the struct passwd that was read from the stream,
* if any.
* buf - contains additional strings, if any.
* buflen - specifies the size of buf.
* *result - returns a pointer to the struct passwd in *pwd.
*
* Returned Value:
* On success, return 0, and *pwbufp shall contain a pointer to the result.
* On failure, *pwbufp shall contain NULL. return an error an follows:
* ENOENT: No more password entries.
* ERANGE: Not enough buffer space. Specify a larger buffer and
* try again.
*
****************************************************************************/
int getpwent_r(FAR struct passwd *pwd,
FAR char *buf, size_t buflen,
FAR struct passwd **result)
{
FAR struct task_info_s *info = task_get_info();
int ret;
#ifdef CONFIG_LIBC_PASSWD_FILE
ret = pwd_findby_index(info->ta_passwd_index, pwd, buf, buflen);
if (ret != 1)
{
*result = NULL;
return ret < 0 ? ret : ENOENT;
}
*result = pwd;
info->ta_passwd_index++;
return OK;
#else
if (info->ta_passwd_index != 0)
{
* back that no match was found.
*/
*result = NULL;
return ENOENT;
}
ret = getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_NAME, ROOT_DIR,
ROOT_SHELL, ROOT_PASSWD, pwd, buf, buflen, result);
if (ret == 0)
{
info->ta_passwd_index++;
}
return ret;
#endif
}