89da9f2fea
Squashed commit of the following:
Last minute clean-up
libs/libc/grp/lib_find_grpfile.c: Fix some problems found in testing.
libs/libc/pwd: Finishes off implementation using /etc/passwd.
libs/libc/grp: Finishes off implementation using /etc/group.
libs/libc/pwd/lib_find_pwdfile.c: Add logic to look up user information in /etc/passwd file, if available.
libs/libc/grp/lib_find_grpfile.c: Add logic to look up group information in /etc/group file, if available.
129 lines
4.1 KiB
C
129 lines
4.1 KiB
C
/****************************************************************************
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* libs/libc/pwd/lib_getpwbuf.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Michael Jung <mijung@gmx.net>
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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 <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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/****************************************************************************
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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 *)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 *)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, 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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free(g_pwd);
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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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