/* Copyright (C) 1997, 2001, 2002, 2003, 2005, 2006 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <atomic.h> #include <nss.h> #include <grp.h> #include <ctype.h> #include <errno.h> #include <string.h> #include <bits/libc-lock.h> #include <rpcsvc/nis.h> #include "nss-nisplus.h" #include "nisplus-parser.h" #include <libnsl.h> #include <nis_intern.h> #include <nis_xdr.h> #define NISOBJVAL(col, obj) \ ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val) #define NISOBJLEN(col, obj) \ ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len) extern nis_name grp_tablename_val attribute_hidden; extern size_t grp_tablename_len attribute_hidden; extern enum nss_status _nss_grp_create_tablename (int *errnop); enum nss_status _nss_nisplus_initgroups_dyn (const char *user, gid_t group, long int *start, long int *size, gid_t **groupsp, long int limit, int *errnop) { if (grp_tablename_val == NULL) { enum nss_status status = _nss_grp_create_tablename (errnop); if (status != NSS_STATUS_SUCCESS) return status; } nis_result *result; char buf[strlen (user) + 12 + grp_tablename_len]; snprintf (buf, sizeof (buf), "[members=%s],%s", user, grp_tablename_val); result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | ALL_RESULTS, NULL, NULL); if (result == NULL) { *errnop = ENOMEM; return NSS_STATUS_TRYAGAIN; } if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0)) { enum nss_status status = niserr2nss (result->status); nis_freeresult (result); return status; } if (NIS_RES_NUMOBJ (result) == 0) { errout: nis_freeresult (result); return NSS_STATUS_NOTFOUND; } gid_t *groups = *groupsp; nis_object *obj = NIS_RES_OBJECT (result); for (unsigned int cnt = 0; cnt < NIS_RES_NUMOBJ (result); ++cnt, ++obj) { if (__type_of (obj) != NIS_ENTRY_OBJ || strcmp (obj->EN_data.en_type, "group_tbl") != 0 || obj->EN_data.en_cols.en_cols_len < 4) continue; char *numstr = NISOBJVAL (2, obj); size_t len = NISOBJLEN (2, obj); if (len == 0 || numstr[0] == '\0') continue; gid_t gid; char *endp; if (__builtin_expect (numstr[len - 1] != '\0', 0)) { char numstrbuf[len + 1]; memcpy (numstrbuf, numstr, len); numstrbuf[len] = '\0'; gid = strtoul (numstrbuf, &endp, 10); if (*endp) continue; } else { gid = strtoul (numstr, &endp, 10); if (*endp) continue; } if (gid == group) continue; /* Insert this group. */ if (*start == *size) { /* Need a bigger buffer. */ long int newsize; if (limit > 0 && *size == limit) /* We reached the maximum. */ break; if (limit <= 0) newsize = 2 * *size; else newsize = MIN (limit, 2 * *size); gid_t *newgroups = realloc (groups, newsize * sizeof (*groups)); if (newgroups == NULL) goto errout; *groupsp = groups = newgroups; *size = newsize; } groups[*start] = gid; *start += 1; } nis_freeresult (result); return NSS_STATUS_SUCCESS; }