| /* Copyright (C) 1997, 2001, 2002, 2003, 2005, 2006 |
| Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. |
| |
| 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> |
| |
| |
| __libc_lock_define_initialized (static, lock); |
| |
| /* Connection information. */ |
| static ib_request *ibreq; |
| static directory_obj *dir; |
| static dir_binding bptr; |
| static char *tablepath; |
| static char *tableptr; |
| /* Cursor. */ |
| static netobj cursor; |
| |
| |
| nis_name grp_tablename_val attribute_hidden; |
| size_t grp_tablename_len attribute_hidden; |
| |
| enum nss_status |
| _nss_grp_create_tablename (int *errnop) |
| { |
| if (grp_tablename_val == NULL) |
| { |
| const char *local_dir = nis_local_directory (); |
| size_t local_dir_len = strlen (local_dir); |
| static const char prefix[] = "group.org_dir."; |
| |
| char *p = malloc (sizeof (prefix) + local_dir_len); |
| if (p == NULL) |
| { |
| *errnop = errno; |
| return NSS_STATUS_TRYAGAIN; |
| } |
| |
| memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1); |
| |
| grp_tablename_len = sizeof (prefix) - 1 + local_dir_len; |
| |
| atomic_write_barrier (); |
| |
| if (atomic_compare_and_exchange_bool_acq (&grp_tablename_val, p, NULL)) |
| { |
| /* Another thread already installed the value. */ |
| free (p); |
| grp_tablename_len = strlen (grp_tablename_val); |
| } |
| } |
| |
| return NSS_STATUS_SUCCESS; |
| } |
| |
| |
| static void |
| internal_endgrent (void) |
| { |
| __nisbind_destroy (&bptr); |
| memset (&bptr, '\0', sizeof (bptr)); |
| |
| nis_free_directory (dir); |
| dir = NULL; |
| |
| nis_free_request (ibreq); |
| ibreq = NULL; |
| |
| xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor); |
| memset (&cursor, '\0', sizeof (cursor)); |
| |
| free (tablepath); |
| tableptr = tablepath = NULL; |
| } |
| |
| |
| static enum nss_status |
| internal_setgrent (int *errnop) |
| { |
| enum nss_status status = NSS_STATUS_SUCCESS; |
| |
| if (grp_tablename_val == NULL) |
| status = _nss_grp_create_tablename (errnop); |
| |
| if (status == NSS_STATUS_SUCCESS) |
| { |
| ibreq = __create_ib_request (grp_tablename_val, 0); |
| if (ibreq == NULL) |
| { |
| *errnop = errno; |
| return NSS_STATUS_TRYAGAIN; |
| } |
| |
| nis_error retcode = __prepare_niscall (grp_tablename_val, &dir, &bptr, 0); |
| if (retcode != NIS_SUCCESS) |
| { |
| nis_free_request (ibreq); |
| ibreq = NULL; |
| status = niserr2nss (retcode); |
| } |
| } |
| |
| return status; |
| } |
| |
| |
| enum nss_status |
| _nss_nisplus_setgrent (int stayopen) |
| { |
| enum nss_status status; |
| |
| __libc_lock_lock (lock); |
| |
| internal_endgrent (); |
| |
| // XXX We need to be able to set errno. Pass in new parameter. |
| int err; |
| status = internal_setgrent (&err); |
| |
| __libc_lock_unlock (lock); |
| |
| return status; |
| } |
| |
| |
| enum nss_status |
| _nss_nisplus_endgrent (void) |
| { |
| __libc_lock_lock (lock); |
| |
| internal_endgrent (); |
| |
| __libc_lock_unlock (lock); |
| |
| return NSS_STATUS_SUCCESS; |
| } |
| |
| |
| static enum nss_status |
| internal_nisplus_getgrent_r (struct group *gr, char *buffer, size_t buflen, |
| int *errnop) |
| { |
| int parse_res = -1; |
| enum nss_status retval = NSS_STATUS_SUCCESS; |
| |
| /* Get the next entry until we found a correct one. */ |
| do |
| { |
| nis_error status; |
| nis_result result; |
| memset (&result, '\0', sizeof (result)); |
| |
| if (cursor.n_bytes == NULL) |
| { |
| if (ibreq == NULL) |
| { |
| retval = internal_setgrent (errnop); |
| if (retval != NSS_STATUS_SUCCESS) |
| return retval; |
| } |
| |
| status = __do_niscall3 (&bptr, NIS_IBFIRST, |
| (xdrproc_t) _xdr_ib_request, |
| (caddr_t) ibreq, |
| (xdrproc_t) _xdr_nis_result, |
| (caddr_t) &result, |
| 0, NULL); |
| } |
| else |
| { |
| ibreq->ibr_cookie.n_bytes = cursor.n_bytes; |
| ibreq->ibr_cookie.n_len = cursor.n_len; |
| |
| status = __do_niscall3 (&bptr, NIS_IBNEXT, |
| (xdrproc_t) _xdr_ib_request, |
| (caddr_t) ibreq, |
| (xdrproc_t) _xdr_nis_result, |
| (caddr_t) &result, |
| 0, NULL); |
| |
| ibreq->ibr_cookie.n_bytes = NULL; |
| ibreq->ibr_cookie.n_len = 0; |
| } |
| |
| if (status != NIS_SUCCESS) |
| return niserr2nss (status); |
| |
| if (NIS_RES_STATUS (&result) == NIS_NOTFOUND) |
| { |
| /* No more entries on this server. This means we have to go |
| to the next server on the path. */ |
| status = __follow_path (&tablepath, &tableptr, ibreq, &bptr); |
| if (status != NIS_SUCCESS) |
| return niserr2nss (status); |
| |
| directory_obj *newdir = NULL; |
| dir_binding newbptr; |
| status = __prepare_niscall (ibreq->ibr_name, &newdir, &newbptr, 0); |
| if (status != NIS_SUCCESS) |
| return niserr2nss (status); |
| |
| nis_free_directory (dir); |
| dir = newdir; |
| __nisbind_destroy (&bptr); |
| bptr = newbptr; |
| |
| xdr_free ((xdrproc_t) xdr_netobj, (char *) &result.cookie); |
| result.cookie.n_bytes = NULL; |
| result.cookie.n_len = 0; |
| parse_res = 0; |
| goto next; |
| } |
| else if (NIS_RES_STATUS (&result) != NIS_SUCCESS) |
| return niserr2nss (NIS_RES_STATUS (&result)); |
| |
| parse_res = _nss_nisplus_parse_grent (&result, gr, |
| buffer, buflen, errnop); |
| if (__builtin_expect (parse_res == -1, 0)) |
| { |
| *errnop = ERANGE; |
| retval = NSS_STATUS_TRYAGAIN; |
| goto freeres; |
| } |
| |
| next: |
| /* Free the old cursor. */ |
| xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor); |
| /* Remember the new one. */ |
| cursor.n_bytes = result.cookie.n_bytes; |
| cursor.n_len = result.cookie.n_len; |
| /* Free the result structure. NB: we do not remove the cookie. */ |
| result.cookie.n_bytes = NULL; |
| result.cookie.n_len = 0; |
| freeres: |
| xdr_free ((xdrproc_t) _xdr_nis_result, (char *) &result); |
| memset (&result, '\0', sizeof (result)); |
| } |
| while (!parse_res); |
| |
| return retval; |
| } |
| |
| enum nss_status |
| _nss_nisplus_getgrent_r (struct group *result, char *buffer, size_t buflen, |
| int *errnop) |
| { |
| int status; |
| |
| __libc_lock_lock (lock); |
| |
| status = internal_nisplus_getgrent_r (result, buffer, buflen, errnop); |
| |
| __libc_lock_unlock (lock); |
| |
| return status; |
| } |
| |
| enum nss_status |
| _nss_nisplus_getgrnam_r (const char *name, struct group *gr, |
| char *buffer, size_t buflen, int *errnop) |
| { |
| int parse_res; |
| |
| if (grp_tablename_val == NULL) |
| { |
| enum nss_status status = _nss_grp_create_tablename (errnop); |
| |
| if (status != NSS_STATUS_SUCCESS) |
| return status; |
| } |
| |
| if (name == NULL) |
| { |
| *errnop = EINVAL; |
| return NSS_STATUS_NOTFOUND; |
| } |
| |
| nis_result *result; |
| char buf[strlen (name) + 9 + grp_tablename_len]; |
| int olderr = errno; |
| |
| snprintf (buf, sizeof (buf), "[name=%s],%s", name, grp_tablename_val); |
| |
| result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, 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; |
| } |
| |
| parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop); |
| nis_freeresult (result); |
| if (__builtin_expect (parse_res < 1, 0)) |
| { |
| if (parse_res == -1) |
| { |
| *errnop = ERANGE; |
| return NSS_STATUS_TRYAGAIN; |
| } |
| else |
| { |
| __set_errno (olderr); |
| return NSS_STATUS_NOTFOUND; |
| } |
| } |
| |
| return NSS_STATUS_SUCCESS; |
| } |
| |
| enum nss_status |
| _nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr, |
| char *buffer, size_t buflen, int *errnop) |
| { |
| if (grp_tablename_val == NULL) |
| { |
| enum nss_status status = _nss_grp_create_tablename (errnop); |
| |
| if (status != NSS_STATUS_SUCCESS) |
| return status; |
| } |
| |
| int parse_res; |
| nis_result *result; |
| char buf[8 + 3 * sizeof (unsigned long int) + grp_tablename_len]; |
| int olderr = errno; |
| |
| snprintf (buf, sizeof (buf), "[gid=%lu],%s", |
| (unsigned long int) gid, grp_tablename_val); |
| |
| result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, 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); |
| |
| __set_errno (olderr); |
| |
| nis_freeresult (result); |
| return status; |
| } |
| |
| parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop); |
| |
| nis_freeresult (result); |
| if (__builtin_expect (parse_res < 1, 0)) |
| { |
| __set_errno (olderr); |
| |
| if (parse_res == -1) |
| { |
| *errnop = ERANGE; |
| return NSS_STATUS_TRYAGAIN; |
| } |
| else |
| return NSS_STATUS_NOTFOUND; |
| } |
| |
| return NSS_STATUS_SUCCESS; |
| } |