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/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <hesiod.h>
#include <pwd.h>
#include <nss.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
NSS_DECLARE_MODULE_FUNCTIONS (hesiod)
/* Get the declaration of the parser function. */
#define ENTNAME pwent
#define STRUCTURE passwd
#define EXTERN_PARSER
#include <nss/nss_files/files-parse.c>
enum nss_status
_nss_hesiod_setpwent (int stayopen)
{
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_hesiod_endpwent (void)
{
return NSS_STATUS_SUCCESS;
}
static enum nss_status
lookup (const char *name, const char *type, struct passwd *pwd,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
size_t linebuflen;
void *context;
char **list;
int parse_res;
size_t len;
int olderr = errno;
if (hesiod_init (&context) < 0)
return NSS_STATUS_UNAVAIL;
list = hesiod_resolve (context, name, type);
if (list == NULL)
{
int err = errno;
hesiod_end (context);
__set_errno (olderr);
return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;
}
linebuflen = buffer + buflen - data->linebuffer;
len = strlen (*list) + 1;
if (linebuflen < len)
{
hesiod_free_list (context, list);
hesiod_end (context);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
memcpy (data->linebuffer, *list, len);
hesiod_free_list (context, list);
hesiod_end (context);
parse_res = _nss_files_parse_pwent (buffer, pwd, data, buflen, errnop);
if (parse_res < 1)
{
__set_errno (olderr);
return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_hesiod_getpwnam_r (const char *name, struct passwd *pwd,
char *buffer, size_t buflen, int *errnop)
{
return lookup (name, "passwd", pwd, buffer, buflen, errnop);
}
enum nss_status
_nss_hesiod_getpwuid_r (uid_t uid, struct passwd *pwd,
char *buffer, size_t buflen, int *errnop)
{
char uidstr[21]; /* We will probably never have a gid_t with more
than 64 bits. */
snprintf (uidstr, sizeof uidstr, "%d", uid);
return lookup (uidstr, "uid", pwd, buffer, buflen, errnop);
}
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