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.
108 lines
4.1 KiB
C
108 lines
4.1 KiB
C
/****************************************************************************
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* libs/libc/pwd/lib_getpwbufr.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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getpwbuf_r
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*
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* Description:
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* libc/grp internal helper function for getpwuid_r and getpwnam_r to setup
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* the caller supplied 'pwd' and 'buf' buffers once a matching entry has
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* 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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* pwd - Pointer to the space to store the retrieved passwd structure in.
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* buf - 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 getpwgid_r returns 0 and sets *result to pwd. In case of
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* failure an error number is returned.
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*
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****************************************************************************/
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int getpwbuf_r(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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FAR struct passwd *pwd, FAR char *buf, size_t buflen,
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FAR struct passwd **result)
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{
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size_t reqdlen;
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reqdlen = strlen(name) + 1 + strlen(dir) + 1 + strlen(shell) + 1;
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if (buflen < reqdlen)
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{
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/* Insufficient buffer space supplied. */
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*result = NULL;
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return ERANGE;
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}
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pwd->pw_name = buf;
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pwd->pw_dir = &buf[strlen(name) + 1];
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pwd->pw_shell = &buf[strlen(name) + 1 + strlen(dir) + 1];
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pwd->pw_uid = uid;
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pwd->pw_gid = gid;
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strcpy(pwd->pw_name, name);
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strcpy(pwd->pw_dir, dir);
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strcpy(pwd->pw_shell, shell);
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*result = pwd;
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return 0;
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}
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