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.
112 lines
4.2 KiB
C
112 lines
4.2 KiB
C
/****************************************************************************
|
|
* libs/libc/grp/lib_getgrbufr.c
|
|
*
|
|
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
|
|
* Author: Michael Jung <mijung@gmx.net>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <grp.h>
|
|
|
|
#include "grp/lib_grp.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: getgrbuf_r
|
|
*
|
|
* Description:
|
|
* libc/grp internal helper function for getgrgid_r and getgrnam_r to setup
|
|
* the caller supplied 'grp' and 'buf' buffers once a matching entry has
|
|
* been found.
|
|
*
|
|
* Input Parameters:
|
|
* gid - Value to set grp->gr_gid to.
|
|
* name - Value to set grp->gr_name to.
|
|
* passwd - Value to set grp->passwd to.
|
|
* grp - Pointer to the space to store the retrieved group structure in.
|
|
* buf - String fields pointed to by the group struct are stored here.
|
|
* buflen - The length of buf in bytes.
|
|
* result - Pointer to the resulting group struct, or NULL in case of fail.
|
|
*
|
|
* Returned Value:
|
|
* On success getgrgid_r returns 0 and sets *result to grp. In case of
|
|
* failure an error number is returned.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int getgrbuf_r(gid_t gid, FAR const char *name, FAR const char *passwd,
|
|
FAR struct group *grp, FAR char *buf, size_t buflen,
|
|
FAR struct group **result)
|
|
{
|
|
size_t reqdlen;
|
|
size_t padlen;
|
|
|
|
/* In 'buf' a NULL pointer value will be stored, which must be naturally
|
|
* aligned, followed by the null terminated group name string and the null
|
|
* terminated passwd string 'x' (indicating 'no password'). Make sure
|
|
* sufficient buffer space was supplied by the caller.
|
|
*/
|
|
|
|
padlen = sizeof(FAR void *) - ((uintptr_t)buf % sizeof(FAR char *));
|
|
reqdlen = sizeof(FAR void *) + strlen(name) + 1 + strlen(passwd) + 1;
|
|
|
|
if (buflen < padlen + reqdlen)
|
|
{
|
|
/* Insufficient buffer space supplied. */
|
|
|
|
*result = NULL;
|
|
return ERANGE;
|
|
}
|
|
|
|
grp->gr_mem = (FAR char **)&buf[padlen];
|
|
grp->gr_name = &buf[padlen + sizeof(FAR char *)];
|
|
grp->gr_passwd = &buf[padlen + sizeof(FAR char *) + strlen(name) + 1];
|
|
|
|
strcpy(grp->gr_name, name);
|
|
strcpy(grp->gr_passwd, passwd);
|
|
grp->gr_gid = gid;
|
|
*grp->gr_mem = NULL;
|
|
|
|
*result = grp;
|
|
return 0;
|
|
}
|