Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 444 insertions, 0 deletions

diff --git a/REORG.TODO/nis/nss_nisplus/nisplus-rpc.c b/REORG.TODO/nis/nss_nisplus/nisplus-rpc.c
new file mode 100644
index 0000000000..977d85a574
--- /dev/null
+++ b/REORG.TODO/nis/nss_nisplus/nisplus-rpc.c
@@ -0,0 +1,444 @@
+/* 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 <ctype.h>
+#include <errno.h>
+#include <nss.h>
+#include <string.h>
+#include <rpc/netdb.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_rpcent (nis_result *result, struct rpcent *rpc,
+			   char *buffer, size_t buflen, int *errnop)
+{
+  char *first_unused = buffer;
+  size_t room_left = buflen;
+  unsigned int i;
+  char *line;
+
+
+  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)[0].EN_data.en_type, "rpc_tbl") != 0
+      || NIS_RES_OBJECT (result)[0].EN_data.en_cols.en_cols_len < 3)
+    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';
+  rpc->r_name = first_unused;
+  size_t len = strlen (first_unused) + 1;
+  room_left -= len;
+  first_unused += len;
+
+  rpc->r_number = atoi (NISENTRYVAL (0, 2, 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.  */
+  line = first_unused;
+  for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
+    {
+      if (strcmp (NISENTRYVAL (i, 1, result), rpc->r_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;
+  rpc->r_aliases = (char **) first_unused;
+
+  /* For the terminating NULL pointer.  */
+  room_left -= sizeof (char *);
+
+  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 *);
+      rpc->r_aliases[i++] = line;
+
+      while (*line != '\0' && *line != ' ')
+        ++line;
+
+      if (*line == ' ')
+	*line++ = '\0';
+    }
+  rpc->r_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[] = "rpc.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_setrpcent (int stayopen)
+{
+  enum nss_status status = NSS_STATUS_SUCCESS;
+
+  __libc_lock_lock (lock);
+
+  if (result != NULL)
+    {
+      nis_freeresult (result);
+      result = NULL;
+    }
+
+  if (tablename_val == NULL)
+    {
+      int err;
+      status = _nss_create_tablename (&err);
+    }
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+enum nss_status
+_nss_nisplus_endrpcent (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_getrpcent_r (struct rpcent *rpc, 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_rpcent (result, rpc, buffer,
+					     buflen, errnop);
+      if (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_getrpcent_r (struct rpcent *result, char *buffer,
+			  size_t buflen, int *errnop)
+{
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_nisplus_getrpcent_r (result, buffer, buflen, errnop);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+enum nss_status
+_nss_nisplus_getrpcbyname_r (const char *name, struct rpcent *rpc,
+			     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)
+    return NSS_STATUS_NOTFOUND;
+
+  char buf[strlen (name) + 10 + 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],%s", name, 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 (result->objects.objects_val) != NIS_ENTRY_OBJ
+	  || strcmp (result->objects.objects_val->EN_data.en_type,
+		     "rpc_tbl") != 0
+	  || result->objects.objects_val->EN_data.en_cols.en_cols_len < 3)
+	snprintf (buf, sizeof (buf), "[cname=%s],%s", name, 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) + 10 + tablename_len;
+	  bufptr = alloca (buflen);
+	  snprintf (bufptr, buflen, "[cname=%s],%s",
+		    entryval, 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;
+    }
+
+  parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen,
+					     errnop);
+
+  nis_freeresult (result);
+
+  if (parse_res < 1)
+    {
+      if (parse_res == -1)
+	{
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      __set_errno (olderr);
+      return NSS_STATUS_NOTFOUND;
+    }
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_getrpcbynumber_r (const int number, struct rpcent *rpc,
+			       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;
+    }
+
+  char buf[12 + 3 * sizeof (number) + tablename_len];
+  int olderr = errno;
+
+  snprintf (buf, sizeof (buf), "[number=%d],%s", number, tablename_val);
+
+  nis_result *result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | USE_DGRAM,
+				 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;
+    }
+
+  int parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen,
+					     errnop);
+
+  nis_freeresult (result);
+
+  if (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;
+}