116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/****************************************************************************
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* libs/libc/pwd/lib_getpwbuf.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 <nuttx/config.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <pwd.h>
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#include "pwd/lib_pwd.h"
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#include "libc.h"
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static FAR char *g_buf;
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static FAR struct passwd *g_pwd;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getpwbuf
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*
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* Description:
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* libc/grp internal helper function for getpwgid and getpwnam to allocate
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* and setup a passwd structure once a matching entry has been found.
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*
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* Input Parameters:
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* uid - Value to set the passwd structure's pw_uid field to.
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* gid - Value to set the passwd structure's pw_gid field to.
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* name - Value to set the passwd structure's pw_name field to.
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* dir - Value to set the passwd structure's pw_dir field to.
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* shell - Value to set the passwd structure's pw_shell field to.
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*
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* Returned Value:
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* A pointer to a statically allocated passwd structure, or NULL if an
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* error occurs, in which case errno is set appropriately.
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*
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****************************************************************************/
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FAR struct passwd *getpwbuf(uid_t uid, gid_t gid, FAR const char *name,
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FAR const char *dir, FAR const char *shell)
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{
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FAR struct passwd *result;
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FAR char *newbuf;
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size_t buflen;
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int err;
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buflen = strlen(name) + 1 + strlen(dir) + 1 + strlen(shell) + 1;
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newbuf = (FAR char *)lib_realloc(g_buf, buflen);
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if (!newbuf)
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{
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err = ENOMEM;
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goto error;
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}
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g_buf = newbuf;
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if (!g_pwd)
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{
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g_pwd = (FAR struct passwd *)lib_malloc(sizeof(struct passwd));
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}
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if (!g_pwd)
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{
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err = ENOMEM;
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goto error;
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}
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err = getpwbuf_r(uid, gid, name, dir, shell,
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g_pwd, g_buf, buflen, &result);
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if (err)
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{
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goto error;
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}
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return result;
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error:
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lib_free(g_pwd);
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lib_free(g_buf);
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g_pwd = NULL;
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g_buf = NULL;
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set_errno(err);
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return NULL;
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}
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