aboutsummaryrefslogtreecommitdiff
path: root/REORG.TODO/nis/nss_nisplus/nisplus-service.c
diff options
context:
space:
mode:
Diffstat (limited to 'REORG.TODO/nis/nss_nisplus/nisplus-service.c')
-rw-r--r--REORG.TODO/nis/nss_nisplus/nisplus-service.c461
1 files changed, 461 insertions, 0 deletions
diff --git a/REORG.TODO/nis/nss_nisplus/nisplus-service.c b/REORG.TODO/nis/nss_nisplus/nisplus-service.c
new file mode 100644
index 0000000000..302087153f
--- /dev/null
+++ b/REORG.TODO/nis/nss_nisplus/nisplus-service.c
@@ -0,0 +1,461 @@
+/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@suse.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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <atomic.h>
+#include <ctype.h>
+#include <errno.h>
+#include <netdb.h>
+#include <nss.h>
+#include <string.h>
+#include <rpcsvc/nis.h>
+#include <libc-lock.h>
+
+#include "nss-nisplus.h"
+
+__libc_lock_define_initialized (static, lock);
+
+static nis_result *result;
+static nis_name tablename_val;
+static u_long tablename_len;
+
+#define NISENTRYVAL(idx, col, res) \
+ (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
+
+#define NISENTRYLEN(idx, col, res) \
+ (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
+
+
+static int
+_nss_nisplus_parse_servent (nis_result *result, struct servent *serv,
+ char *buffer, size_t buflen, int *errnop)
+{
+ char *first_unused = buffer;
+ size_t room_left = buflen;
+
+ if (result == NULL)
+ return 0;
+
+ if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
+ || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
+ || strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "services_tbl") != 0
+ || NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 4)
+ return 0;
+
+ if (NISENTRYLEN (0, 0, result) >= room_left)
+ {
+ no_more_room:
+ *errnop = ERANGE;
+ return -1;
+ }
+ strncpy (first_unused, NISENTRYVAL (0, 0, result),
+ NISENTRYLEN (0, 0, result));
+ first_unused[NISENTRYLEN (0, 0, result)] = '\0';
+ serv->s_name = first_unused;
+ size_t len = strlen (first_unused) + 1;
+ room_left -= len;
+ first_unused += len;
+
+ if (NISENTRYLEN (0, 2, result) >= room_left)
+ goto no_more_room;
+ strncpy (first_unused, NISENTRYVAL (0, 2, result),
+ NISENTRYLEN (0, 2, result));
+ first_unused[NISENTRYLEN (0, 2, result)] = '\0';
+ serv->s_proto = first_unused;
+ len = strlen (first_unused) + 1;
+ room_left -= len;
+ first_unused += len;
+
+ serv->s_port = htons (atoi (NISENTRYVAL (0, 3, result)));
+
+ /* XXX Rewrite at some point to allocate the array first and then
+ copy the strings. It wasteful to first concatenate the strings
+ to just split them again later. */
+ char *line = first_unused;
+ for (unsigned int i = 0; i < NIS_RES_NUMOBJ (result); ++i)
+ {
+ if (strcmp (NISENTRYVAL (i, 1, result), serv->s_name) != 0)
+ {
+ if (NISENTRYLEN (i, 1, result) + 2 > room_left)
+ goto no_more_room;
+ *first_unused++ = ' ';
+ first_unused = __stpncpy (first_unused, NISENTRYVAL (i, 1, result),
+ NISENTRYLEN (i, 1, result));
+ room_left -= NISENTRYLEN (i, 1, result) + 1;
+ }
+ }
+ *first_unused++ = '\0';
+
+ /* Adjust the pointer so it is aligned for
+ storing pointers. */
+ size_t adjust = ((__alignof__ (char *)
+ - (first_unused - (char *) 0) % __alignof__ (char *))
+ % __alignof__ (char *));
+ if (room_left < adjust + sizeof (char *))
+ goto no_more_room;
+ first_unused += adjust;
+ room_left -= adjust;
+ serv->s_aliases = (char **) first_unused;
+
+ /* For the terminating NULL pointer. */
+ room_left -= (sizeof (char *));
+
+ unsigned int i = 0;
+ while (*line != '\0')
+ {
+ /* Skip leading blanks. */
+ while (isspace (*line))
+ ++line;
+
+ if (*line == '\0')
+ break;
+
+ if (room_left < sizeof (char *))
+ goto no_more_room;
+
+ room_left -= sizeof (char *);
+ serv->s_aliases[i++] = line;
+
+ while (*line != '\0' && *line != ' ')
+ ++line;
+
+ if (*line == ' ')
+ *line++ = '\0';
+ }
+ serv->s_aliases[i] = NULL;
+
+ return 1;
+}
+
+
+static enum nss_status
+_nss_create_tablename (int *errnop)
+{
+ if (tablename_val == NULL)
+ {
+ const char *local_dir = nis_local_directory ();
+ size_t local_dir_len = strlen (local_dir);
+ static const char prefix[] = "services.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);
+
+ tablename_len = sizeof (prefix) - 1 + local_dir_len;
+
+ atomic_write_barrier ();
+
+ tablename_val = p;
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_nisplus_setservent (int stayopen)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+ int err;
+
+ __libc_lock_lock (lock);
+
+ if (result != NULL)
+ {
+ nis_freeresult (result);
+ result = NULL;
+ }
+
+ if (tablename_val == NULL)
+ status = _nss_create_tablename (&err);
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nisplus_endservent (void)
+{
+ __libc_lock_lock (lock);
+
+ if (result != NULL)
+ {
+ nis_freeresult (result);
+ result = NULL;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nisplus_getservent_r (struct servent *serv, char *buffer,
+ size_t buflen, int *errnop)
+{
+ int parse_res;
+
+ /* Get the next entry until we found a correct one. */
+ do
+ {
+ nis_result *saved_res;
+
+ if (result == NULL)
+ {
+ saved_res = NULL;
+ if (tablename_val == NULL)
+ {
+ enum nss_status status = _nss_create_tablename (errnop);
+
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ result = nis_first_entry (tablename_val);
+ if (result == NULL)
+ {
+ *errnop = errno;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+ return niserr2nss (result->status);
+ }
+ else
+ {
+ saved_res = result;
+ result = nis_next_entry (tablename_val, &result->cookie);
+ if (result == NULL)
+ {
+ *errnop = errno;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+ {
+ nis_freeresult (saved_res);
+ return niserr2nss (result->status);
+ }
+ }
+
+ parse_res = _nss_nisplus_parse_servent (result, serv, buffer,
+ buflen, errnop);
+ if (__glibc_unlikely (parse_res == -1))
+ {
+ nis_freeresult (result);
+ result = saved_res;
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ else
+ {
+ if (saved_res)
+ nis_freeresult (saved_res);
+ }
+ }
+ while (!parse_res);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_getservent_r (struct servent *result, char *buffer,
+ size_t buflen, int *errnop)
+{
+ __libc_lock_lock (lock);
+
+ int status = internal_nisplus_getservent_r (result, buffer, buflen, errnop);
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nisplus_getservbyname_r (const char *name, const char *protocol,
+ struct servent *serv,
+ char *buffer, size_t buflen, int *errnop)
+{
+ if (tablename_val == NULL)
+ {
+ __libc_lock_lock (lock);
+
+ enum nss_status status = _nss_create_tablename (errnop);
+
+ __libc_lock_unlock (lock);
+
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ if (name == NULL || protocol == NULL)
+ {
+ *errnop = EINVAL;
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ size_t protocol_len = strlen (protocol);
+ char buf[strlen (name) + protocol_len + 17 + tablename_len];
+ int olderr = errno;
+
+ /* Search at first in the alias list, and use the correct name
+ for the next search */
+ snprintf (buf, sizeof (buf), "[name=%s,proto=%s],%s", name, protocol,
+ tablename_val);
+ nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM,
+ NULL, NULL);
+
+ if (result != NULL)
+ {
+ char *bufptr = buf;
+
+ /* If we did not find it, try it as original name. But if the
+ database is correct, we should find it in the first case, too */
+ if ((result->status != NIS_SUCCESS
+ && result->status != NIS_S_SUCCESS)
+ || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
+ || strcmp (NIS_RES_OBJECT (result)->EN_data.en_type,
+ "services_tbl") != 0
+ || NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 4)
+ snprintf (buf, sizeof (buf), "[cname=%s,proto=%s],%s", name, protocol,
+ tablename_val);
+ else
+ {
+ /* We need to allocate a new buffer since there is no
+ guarantee the returned name has a length limit. */
+ const char *entryval = NISENTRYVAL(0, 0, result);
+ size_t buflen = (strlen (entryval) + protocol_len + 17
+ + tablename_len);
+ bufptr = alloca (buflen);
+ snprintf (bufptr, buflen, "[cname=%s,proto=%s],%s",
+ entryval, protocol, tablename_val);
+ }
+
+ nis_freeresult (result);
+ result = nis_list (bufptr, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM,
+ NULL, NULL);
+ }
+
+ if (result == NULL)
+ {
+ *errnop = ENOMEM;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
+ {
+ enum nss_status status = niserr2nss (result->status);
+
+ __set_errno (olderr);
+
+ nis_freeresult (result);
+ return status;
+ }
+
+ int parse_res = _nss_nisplus_parse_servent (result, serv, buffer, buflen,
+ errnop);
+ nis_freeresult (result);
+
+ if (__glibc_unlikely (parse_res < 1))
+ {
+ 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_getservbyport_r (const int number, const char *protocol,
+ struct servent *serv,
+ char *buffer, size_t buflen, int *errnop)
+{
+ if (tablename_val == NULL)
+ {
+ __libc_lock_lock (lock);
+
+ enum nss_status status = _nss_create_tablename (errnop);
+
+ __libc_lock_unlock (lock);
+
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ if (protocol == NULL)
+ {
+ *errnop = EINVAL;
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ char buf[17 + 3 * sizeof (int) + strlen (protocol) + tablename_len];
+ int olderr = errno;
+
+ snprintf (buf, sizeof (buf), "[port=%d,proto=%s],%s",
+ number, protocol, tablename_val);
+
+ nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM,
+ NULL, NULL);
+
+ if (result == NULL)
+ {
+ *errnop = ENOMEM;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
+ {
+ enum nss_status status = niserr2nss (result->status);
+
+ __set_errno (olderr);
+
+ nis_freeresult (result);
+ return status;
+ }
+
+ int parse_res = _nss_nisplus_parse_servent (result, serv, buffer, buflen,
+ errnop);
+ nis_freeresult (result);
+
+ if (__glibc_unlikely (parse_res < 1))
+ {
+ if (parse_res == -1)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ else
+ {
+ __set_errno (olderr);
+ return NSS_STATUS_NOTFOUND;
+ }
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 03:47:56 +0000