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688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <atomic.h>
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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 <libc-lock.h>
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#include <rpcsvc/nis.h>
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#include "nss-nisplus.h"
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#include "nisplus-parser.h"
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#include <libnsl.h>
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#include <nis_intern.h>
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#include <nis_xdr.h>
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#define NISOBJVAL(col, obj) \
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((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
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#define NISOBJLEN(col, obj) \
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((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
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extern nis_name grp_tablename_val attribute_hidden;
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extern size_t grp_tablename_len attribute_hidden;
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extern enum nss_status _nss_grp_create_tablename (int *errnop);
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enum nss_status
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_nss_nisplus_initgroups_dyn (const char *user, gid_t group, long int *start,
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long int *size, gid_t **groupsp, long int limit,
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int *errnop)
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{
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if (grp_tablename_val == NULL)
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{
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enum nss_status status = _nss_grp_create_tablename (errnop);
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if (status != NSS_STATUS_SUCCESS)
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return status;
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}
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nis_result *result;
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char buf[strlen (user) + 12 + grp_tablename_len];
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snprintf (buf, sizeof (buf), "[members=%s],%s", user, grp_tablename_val);
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result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | ALL_RESULTS, NULL, NULL);
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if (result == NULL)
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{
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*errnop = ENOMEM;
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return NSS_STATUS_TRYAGAIN;
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}
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if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
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{
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enum nss_status status = niserr2nss (result->status);
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nis_freeresult (result);
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return status;
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}
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if (NIS_RES_NUMOBJ (result) == 0)
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{
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errout:
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nis_freeresult (result);
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return NSS_STATUS_NOTFOUND;
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}
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gid_t *groups = *groupsp;
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nis_object *obj = NIS_RES_OBJECT (result);
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for (unsigned int cnt = 0; cnt < NIS_RES_NUMOBJ (result); ++cnt, ++obj)
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{
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if (__type_of (obj) != NIS_ENTRY_OBJ
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|| strcmp (obj->EN_data.en_type, "group_tbl") != 0
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|| obj->EN_data.en_cols.en_cols_len < 4)
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continue;
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char *numstr = NISOBJVAL (2, obj);
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size_t len = NISOBJLEN (2, obj);
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if (len == 0 || numstr[0] == '\0')
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continue;
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gid_t gid;
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char *endp;
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if (__glibc_unlikely (numstr[len - 1] != '\0'))
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{
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char numstrbuf[len + 1];
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memcpy (numstrbuf, numstr, len);
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numstrbuf[len] = '\0';
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gid = strtoul (numstrbuf, &endp, 10);
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if (*endp)
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continue;
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}
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else
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{
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gid = strtoul (numstr, &endp, 10);
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if (*endp)
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continue;
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}
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if (gid == group)
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continue;
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/* Insert this group. */
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if (*start == *size)
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{
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/* Need a bigger buffer. */
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long int newsize;
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if (limit > 0 && *size == limit)
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/* We reached the maximum. */
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break;
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if (limit <= 0)
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newsize = 2 * *size;
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else
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newsize = MIN (limit, 2 * *size);
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gid_t *newgroups = realloc (groups, newsize * sizeof (*groups));
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if (newgroups == NULL)
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goto errout;
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*groupsp = groups = newgroups;
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*size = newsize;
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}
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groups[*start] = gid;
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*start += 1;
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}
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nis_freeresult (result);
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return NSS_STATUS_SUCCESS;
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}
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