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.
102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/****************************************************************************
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* libs/libc/pwd/lib_getpwuidr.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 <pwd.h>
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#include "pwd/lib_pwd.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getpwuid_r
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*
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* Description:
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* The getpwuid_r() function searches the user database for an entry with a
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* matching uid and stores the retrieved passwd structure in the space
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* pointed to by pwd.
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*
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* Input Parameters:
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* uid - The uid to return a passwd structure for.
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* pwd - Pointer to the space to store the retrieved passwd structure in.
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* buf - The string fields pointed to by the passwd struct are stored here.
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* buflen - The length of buf in bytes.
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* result - Pointer to the resulting passwd struct, or NULL in case of fail.
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*
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* Returned Value:
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* On success getpwuid_r returns 0 and sets *result to pwd. If no match
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* is found, 0 is returned and *result is set to NULL. In case of failure
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* an error number is returned.
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*
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****************************************************************************/
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int getpwuid_r(uid_t uid, FAR struct passwd *pwd, FAR char *buf,
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size_t buflen, FAR struct passwd **result)
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{
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#ifdef CONFIG_LIBC_PASSWD_FILE
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int ret;
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ret = pwd_findby_uid(uid, pwd, buf, buflen);
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if (ret != 1)
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{
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*result = NULL;
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return ret < 0 ? -ret : 0;
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}
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*result = pwd;
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return 0;
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#else
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if (uid != ROOT_UID)
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{
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/* The only known user is 'root', which has a uid of 0. Thus, report
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* back that no match was found.
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*/
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*result = NULL;
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return 0;
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}
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return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_DIR, ROOT_SHELL, pwd,
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buf, buflen, result);
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#endif
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}
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