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.
90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
/****************************************************************************
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* libs/libc/grp/lib_getgrgid.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 <grp.h>
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#include "grp/lib_grp.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getgrgid
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*
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* Description:
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* The getgrgid() function searches the group database for an entry with
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* a matching gid.
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*
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* Input Parameters:
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* gid - The gid to return a group structure for
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*
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* Returned Value:
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* A pointer to a statically allocated group structure, or NULL if no
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* matching entry is found or an error occurs. Applications wishing to
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* check for error situations should set errno to 0 before calling
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* getgrgid(). If getgrgid() returns a null pointer and errno is set to
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* non-zero, an error occurred.
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*
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****************************************************************************/
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FAR struct group *getgrgid(gid_t gid)
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{
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#ifdef CONFIG_LIBC_GROUP_FILE
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int ret;
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ret = grp_findby_gid(gid, &g_group, g_group_buffer, GRPBUF_RESERVE_SIZE);
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if (ret != 1)
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{
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return NULL;
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}
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return &g_group;
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#else
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if (gid != ROOT_GID)
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{
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return NULL;
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}
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return getgrbuf(ROOT_GID, ROOT_NAME, ROOT_PASSWD);
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#endif
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}
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