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/* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
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 <nss.h>
#include <grp.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
/* Get the declaration of the parser function. */
#define ENTNAME grent
#define STRUCTURE group
#define EXTERN_PARSER
#include <nss/nss_files/files-parse.c>
struct response_t
{
char *val;
struct response_t *next;
};
struct intern_t
{
struct response_t *start;
struct response_t *next;
};
typedef struct intern_t intern_t;
static int
saveit (int instatus, char *inkey, int inkeylen, char *inval,
int invallen, char *indata)
{
intern_t *intern = (intern_t *) indata;
if (instatus != YP_TRUE)
return instatus;
if (inkey && inkeylen > 0 && inval && invallen > 0)
{
if (intern->start == NULL)
{
intern->start = malloc (sizeof (struct response_t));
intern->next = intern->start;
}
else
{
intern->next->next = malloc (sizeof (struct response_t));
intern->next = intern->next->next;
}
intern->next->next = NULL;
intern->next->val = malloc (invallen + 1);
strncpy (intern->next->val, inval, invallen);
intern->next->val[invallen] = '\0';
}
return 0;
}
static enum nss_status
internal_setgrent (intern_t *intern)
{
char *domainname;
struct ypall_callback ypcb;
enum nss_status status;
if (yp_get_default_domain (&domainname))
return NSS_STATUS_UNAVAIL;
intern->start = NULL;
ypcb.foreach = saveit;
ypcb.data = (char *) intern;
status = yperr2nss (yp_all (domainname, "group.byname", &ypcb));
intern->next = intern->start;
return status;
}
static enum nss_status
internal_getgrent_r (struct group *grp, char *buffer, size_t buflen,
int *errnop, intern_t *intern)
{
struct parser_data *data = (void *) buffer;
int parse_res;
char *p;
if (intern->start == NULL)
internal_setgrent (intern);
/* Get the next entry until we found a correct one. */
do
{
if (intern->next == NULL)
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
p = strncpy (buffer, intern->next->val, buflen);
while (isspace (*p))
++p;
parse_res = _nss_files_parse_grent (p, grp, data, buflen, errnop);
if (parse_res == -1)
return NSS_STATUS_TRYAGAIN;
intern->next = intern->next->next;
}
while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_initgroups (const char *user, gid_t group, long int *start,
long int *size, gid_t *groups, long int limit,
int *errnop)
{
struct group grpbuf, *g;
size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
char *tmpbuf;
enum nss_status status;
intern_t intern = { NULL, NULL };
status = internal_setgrent (&intern);
if (status != NSS_STATUS_SUCCESS)
return status;
tmpbuf = __alloca (buflen);
do
{
while ((status =
internal_getgrent_r (&grpbuf, tmpbuf, buflen, errnop,
&intern)) == NSS_STATUS_TRYAGAIN
&& *errnop == ERANGE)
{
buflen *= 2;
tmpbuf = __alloca (buflen);
}
if (status != NSS_STATUS_SUCCESS)
goto done;
g = &grpbuf;
if (g->gr_gid != group)
{
char **m;
for (m = g->gr_mem; *m != NULL; ++m)
if (strcmp (*m, user) == 0)
{
/* Matches user. Insert this group. */
if (*start == *size && limit <= 0)
{
/* Need a bigger buffer. */
groups = realloc (groups, 2 * *size * sizeof (*groups));
if (groups == NULL)
goto done;
*size *= 2;
}
groups[*start] = g->gr_gid;
*start += 1;
if (*start == limit)
/* Can't take any more groups; stop searching. */
goto done;
break;
}
}
}
while (status == NSS_STATUS_SUCCESS);
done:
while (intern.start != NULL)
{
if (intern.start->val != NULL)
free (intern.start->val);
intern.next = intern.start;
intern.start = intern.start->next;
free (intern.next);
}
return NSS_STATUS_SUCCESS;
}
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