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Diffstat (limited to 'REORG.TODO/nis/nss_nisplus/nisplus-alias.c')
-rw-r--r--REORG.TODO/nis/nss_nisplus/nisplus-alias.c337
1 files changed, 337 insertions, 0 deletions
diff --git a/REORG.TODO/nis/nss_nisplus/nisplus-alias.c b/REORG.TODO/nis/nss_nisplus/nisplus-alias.c
new file mode 100644
index 0000000000..8301e5a836
--- /dev/null
+++ b/REORG.TODO/nis/nss_nisplus/nisplus-alias.c
@@ -0,0 +1,337 @@
+/* Copyright (C) 1997-2017 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <atomic.h>
+#include <nss.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+#include <aliases.h>
+#include <libc-lock.h>
+#include <rpcsvc/nis.h>
+
+#include "nss-nisplus.h"
+
+__libc_lock_define_initialized (static, lock)
+
+static nis_result *result;
+static u_long next_entry;
+static nis_name tablename_val;
+static size_t 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 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[] = "mail_aliases.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;
+}
+
+static int
+_nss_nisplus_parse_aliasent (nis_result *result, unsigned long entry,
+ struct aliasent *alias, char *buffer,
+ size_t buflen, int *errnop)
+{
+ if (result == NULL)
+ return 0;
+
+ if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
+ || __type_of (&NIS_RES_OBJECT (result)[entry]) != NIS_ENTRY_OBJ
+ || strcmp (NIS_RES_OBJECT (result)[entry].EN_data.en_type,
+ "mail_aliases") != 0
+ || NIS_RES_OBJECT (result)[entry].EN_data.en_cols.en_cols_len < 2)
+ return 0;
+
+ if (NISENTRYLEN (entry, 1, result) >= buflen)
+ {
+ /* The line is too long for our buffer. */
+ no_more_room:
+ *errnop = ERANGE;
+ return -1;
+ }
+
+ char *cp = __stpncpy (buffer, NISENTRYVAL (entry, 1, result),
+ NISENTRYLEN (entry, 1, result));
+ *cp = '\0';
+
+ char *first_unused = cp + 1;
+ size_t room_left = buflen - (first_unused - buffer);
+
+ alias->alias_local = 0;
+ alias->alias_members_len = 0;
+
+ if (NISENTRYLEN (entry, 0, result) >= room_left)
+ goto no_more_room;
+
+ cp = __stpncpy (first_unused, NISENTRYVAL (entry, 0, result),
+ NISENTRYLEN (entry, 0, result));
+ *cp = '\0';
+ alias->alias_name = first_unused;
+
+ /* Terminate the line for any case. */
+ cp = strpbrk (alias->alias_name, "#\n");
+ if (cp != NULL)
+ *cp = '\0';
+
+ size_t len = strlen (alias->alias_name) + 1;
+ first_unused += len;
+ room_left -= len;
+
+ /* 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)
+ goto no_more_room;
+ first_unused += adjust;
+ room_left -= adjust;
+
+ alias->alias_members = (char **) first_unused;
+
+ char *line = buffer;
+ 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 *);
+ alias->alias_members[alias->alias_members_len] = line;
+
+ while (*line != '\0' && *line != ',')
+ ++line;
+
+ if (line != alias->alias_members[alias->alias_members_len])
+ {
+ *line++ = '\0';
+ ++alias->alias_members_len;
+ }
+ else if (*line == ',')
+ ++line;
+ }
+
+ return alias->alias_members_len == 0 ? 0 : 1;
+}
+
+static enum nss_status
+internal_setaliasent (void)
+{
+ enum nss_status status;
+ int err;
+
+ if (result != NULL)
+ {
+ nis_freeresult (result);
+ result = NULL;
+ }
+
+ if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS)
+ return NSS_STATUS_UNAVAIL;
+
+ next_entry = 0;
+ result = nis_list (tablename_val, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+ if (result == NULL)
+ {
+ status = NSS_STATUS_TRYAGAIN;
+ __set_errno (ENOMEM);
+ }
+ else
+ {
+ status = niserr2nss (result->status);
+ if (status != NSS_STATUS_SUCCESS)
+ {
+ nis_freeresult (result);
+ result = NULL;
+ }
+ }
+ return status;
+}
+
+enum nss_status
+_nss_nisplus_setaliasent (void)
+{
+ enum nss_status status;
+
+ __libc_lock_lock (lock);
+
+ status = internal_setaliasent ();
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nisplus_endaliasent (void)
+{
+ __libc_lock_lock (lock);
+
+ if (result != NULL)
+ {
+ nis_freeresult (result);
+ result = NULL;
+ }
+ next_entry = 0;
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nisplus_getaliasent_r (struct aliasent *alias,
+ char *buffer, size_t buflen, int *errnop)
+{
+ int parse_res;
+
+ if (result == NULL)
+ {
+ enum nss_status status;
+
+ status = internal_setaliasent ();
+ if (result == NULL || status != NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ /* Get the next entry until we found a correct one. */
+ do
+ {
+ if (next_entry >= result->objects.objects_len)
+ return NSS_STATUS_NOTFOUND;
+
+ parse_res = _nss_nisplus_parse_aliasent (result, next_entry, alias,
+ buffer, buflen, errnop);
+ if (parse_res == -1)
+ return NSS_STATUS_TRYAGAIN;
+
+ ++next_entry;
+ }
+ while (!parse_res);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_getaliasent_r (struct aliasent *result, char *buffer,
+ size_t buflen, int *errnop)
+{
+ int status;
+
+ __libc_lock_lock (lock);
+
+ status = internal_nisplus_getaliasent_r (result, buffer, buflen, errnop);
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nisplus_getaliasbyname_r (const char *name, struct aliasent *alias,
+ char *buffer, size_t buflen, int *errnop)
+{
+ int parse_res;
+
+ 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)
+ {
+ *errnop = EINVAL;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ char buf[strlen (name) + 9 + tablename_len];
+ int olderr = errno;
+
+ snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
+
+ nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, 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);
+ nis_freeresult (result);
+ return status;
+ }
+
+ parse_res = _nss_nisplus_parse_aliasent (result, 0, alias,
+ buffer, buflen, errnop);
+
+ /* We do not need the lookup result anymore. */
+ nis_freeresult (result);
+
+ if (__glibc_unlikely (parse_res < 1))
+ {
+ __set_errno (olderr);
+
+ if (parse_res == -1)
+ return NSS_STATUS_TRYAGAIN;
+ else
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ return NSS_STATUS_SUCCESS;
+}
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