205 lines
5.1 KiB
C
205 lines
5.1 KiB
C
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/* Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <nss.h>
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#include <grp.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include "nss-nis.h"
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/* Get the declaration of the parser function. */
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#define ENTNAME grent
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#define STRUCTURE group
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#define EXTERN_PARSER
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#include <nss/nss_files/files-parse.c>
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struct response_t
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{
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char *val;
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struct response_t *next;
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};
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struct intern_t
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{
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struct response_t *start;
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struct response_t *next;
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};
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typedef struct intern_t intern_t;
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static int
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saveit (int instatus, char *inkey, int inkeylen, char *inval,
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int invallen, char *indata)
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{
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intern_t *intern = (intern_t *) indata;
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if (instatus != YP_TRUE)
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return instatus;
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if (inkey && inkeylen > 0 && inval && invallen > 0)
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{
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if (intern->start == NULL)
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{
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intern->start = malloc (sizeof (struct response_t));
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intern->next = intern->start;
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}
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else
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{
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intern->next->next = malloc (sizeof (struct response_t));
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intern->next = intern->next->next;
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}
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intern->next->next = NULL;
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intern->next->val = malloc (invallen + 1);
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strncpy (intern->next->val, inval, invallen);
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intern->next->val[invallen] = '\0';
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}
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return 0;
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}
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static enum nss_status
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internal_setgrent (intern_t *intern)
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{
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char *domainname;
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struct ypall_callback ypcb;
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enum nss_status status;
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if (yp_get_default_domain (&domainname))
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return NSS_STATUS_UNAVAIL;
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intern->start = NULL;
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ypcb.foreach = saveit;
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ypcb.data = (char *) intern;
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status = yperr2nss (yp_all (domainname, "group.byname", &ypcb));
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intern->next = intern->start;
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return status;
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}
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static enum nss_status
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internal_getgrent_r (struct group *grp, char *buffer, size_t buflen,
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int *errnop, intern_t *intern)
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{
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struct parser_data *data = (void *) buffer;
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int parse_res;
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char *p;
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if (intern->start == NULL)
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internal_setgrent (intern);
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/* Get the next entry until we found a correct one. */
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do
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{
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if (intern->next == NULL)
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return NSS_STATUS_NOTFOUND;
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p = strncpy (buffer, intern->next->val, buflen);
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while (isspace (*p))
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++p;
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parse_res = _nss_files_parse_grent (p, grp, data, buflen, errnop);
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if (parse_res == -1)
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return NSS_STATUS_TRYAGAIN;
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intern->next = intern->next->next;
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}
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while (!parse_res);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nis_initgroups (const char *user, gid_t group, long int *start,
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long int *size, gid_t *groups, long int limit,
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int *errnop)
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{
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struct group grpbuf, *g;
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size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
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char *tmpbuf;
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enum nss_status status;
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intern_t intern = { NULL, NULL };
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status = internal_setgrent (&intern);
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if (status != NSS_STATUS_SUCCESS)
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return status;
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tmpbuf = __alloca (buflen);
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do
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{
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while ((status =
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internal_getgrent_r (&grpbuf, tmpbuf, buflen, errnop,
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&intern)) == NSS_STATUS_TRYAGAIN
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&& *errnop == ERANGE)
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{
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buflen *= 2;
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tmpbuf = __alloca (buflen);
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}
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if (status != NSS_STATUS_SUCCESS)
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goto done;
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g = &grpbuf;
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if (g->gr_gid != group)
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{
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char **m;
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for (m = g->gr_mem; *m != NULL; ++m)
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if (strcmp (*m, user) == 0)
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{
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/* Matches user. Insert this group. */
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if (*start == *size && limit <= 0)
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{
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/* Need a bigger buffer. */
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groups = realloc (groups, *size * sizeof (*groups));
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if (groups == NULL)
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goto done;
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*size *= 2;
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}
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groups[*start] = g->gr_gid;
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*start += 1;
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if (*start == limit)
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/* Can't take any more groups; stop searching. */
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goto done;
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break;
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}
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}
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}
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while (status == NSS_STATUS_SUCCESS);
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done:
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while (intern.start != NULL)
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{
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if (intern.start->val != NULL)
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free (intern.start->val);
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intern.next = intern.start;
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intern.start = intern.start->next;
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free (intern.next);
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}
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return NSS_STATUS_SUCCESS;
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}
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