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/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <ctype.h>
#include <errno.h>
#include <grp.h>
#include <hesiod.h>
#include <nss.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "nss_hesiod.h"
/* Get the declaration of the parser function. */
#define ENTNAME grent
#define STRUCTURE group
#define EXTERN_PARSER
#include <nss/nss_files/files-parse.c>
enum nss_status
_nss_hesiod_setgrent (void)
{
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_hesiod_endgrent (void)
{
return NSS_STATUS_SUCCESS;
}
static enum nss_status
lookup (const char *name, const char *type, struct group *grp,
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;
context = _nss_hesiod_init ();
if (context == NULL)
return NSS_STATUS_UNAVAIL;
list = hesiod_resolve (context, name, type);
if (list == NULL)
{
hesiod_end (context);
return errno == 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_grent (buffer, grp, data, buflen, errnop);
if (parse_res < 1)
return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_hesiod_getgrnam_r (const char *name, struct group *grp,
char *buffer, size_t buflen, int *errnop)
{
return lookup (name, "group", grp, buffer, buflen, errnop);
}
enum nss_status
_nss_hesiod_getgrgid_r (gid_t gid, struct group *grp,
char *buffer, size_t buflen, int *errnop)
{
char gidstr[21]; /* We will probably never have a gid_t with more
than 64 bits. */
snprintf (gidstr, sizeof gidstr, "%d", gid);
return lookup (gidstr, "gid", grp, buffer, buflen, errnop);
}
static int
internal_gid_in_list (const gid_t *list, const gid_t g, long int len)
{
while (len > 0)
{
if (*list == g)
return 1;
--len;
++list;
}
return 0;
}
static enum nss_status
internal_gid_from_group (void *context, const char *groupname, gid_t *group)
{
char **grp_res;
enum nss_status status = NSS_STATUS_NOTFOUND;
grp_res = hesiod_resolve (context, groupname, "group");
if (grp_res != NULL && *grp_res != NULL)
{
char *p = *grp_res;
while (*p != '\0' && *p != ':')
++p;
while (*p != '\0' && *p == ':')
++p;
while (*p != '\0' && *p != ':')
++p;
while (*p != '\0' && *p == ':')
++p;
if (*p == ':')
{
char *endp;
char *q = ++p;
long int val;
q = p;
while (*q != '\0' && *q != ':')
++q;
val = strtol (p, &endp, 10);
if (sizeof (gid_t) == sizeof (long int) || (gid_t) val == val)
{
*group = val;
if (endp == q && endp != p)
status = NSS_STATUS_SUCCESS;
}
}
hesiod_free_list (context, grp_res);
}
return status;
}
enum nss_status
_nss_hesiod_initgroups (const char *user, gid_t group, long int *start,
long int *size, gid_t *groups, long int limit,
int *errnop)
{
enum nss_status status = NSS_STATUS_SUCCESS;
char **list = NULL;
char *p;
void *context;
context = _nss_hesiod_init ();
if (context == NULL)
return NSS_STATUS_UNAVAIL;
list = hesiod_resolve (context, user, "grplist");
if (list == NULL)
{
hesiod_end (context);
return errno == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;
}
if (!internal_gid_in_list (groups, group, *start) && *start < limit)
groups[(*start)++] = group;
p = *list;
while (*p != '\0' && *start < limit)
{
char *endp;
char *q;
long int val;
status = NSS_STATUS_NOTFOUND;
q = p;
while (*q != '\0' && *q != ':')
++q;
if (*q != '\0')
*q++ = '\0';
val = strtol (p, &endp, 10);
if (sizeof (gid_t) == sizeof (long int) || (gid_t) val == val)
{
if (*endp == '\0' && endp != p)
status = NSS_STATUS_SUCCESS;
else
status = internal_gid_from_group (context, p, &group);
if (status == NSS_STATUS_SUCCESS
&& !internal_gid_in_list (groups, group, *start))
groups[(*start)++] = group;
}
p = q;
}
hesiod_free_list (context, list);
hesiod_end (context);
return NSS_STATUS_SUCCESS;
}
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