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, 567 insertions, 0 deletions

diff --git a/REORG.TODO/nis/nss_nis/nis-hosts.c b/REORG.TODO/nis/nss_nis/nis-hosts.c
new file mode 100644
index 0000000000..f64dbdaecb
--- /dev/null
+++ b/REORG.TODO/nis/nss_nis/nis-hosts.c
@@ -0,0 +1,567 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
+
+   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 <assert.h>
+#include <nss.h>
+#include <ctype.h>
+/* The following is an ugly trick to avoid a prototype declaration for
+   _nss_nis_endgrent.  */
+#define _nss_nis_endhostent _nss_nis_endhostent_XXX
+#include <netdb.h>
+#undef _nss_nis_endhostent
+#include <string.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <resolv/resolv-internal.h>
+#include <libc-lock.h>
+#include <rpcsvc/yp.h>
+#include <rpcsvc/ypclnt.h>
+
+#include "nss-nis.h"
+
+/* Get implementation for some internal functions. */
+#include <resolv/mapv4v6addr.h>
+
+#define ENTNAME         hostent
+#define DATABASE        "hosts"
+#define NEED_H_ERRNO
+
+#define EXTRA_ARGS      , af, flags
+#define EXTRA_ARGS_DECL , int af, int flags
+
+#define ENTDATA hostent_data
+struct hostent_data
+  {
+    unsigned char host_addr[16];	/* IPv4 or IPv6 address.  */
+    char *h_addr_ptrs[2];	/* Points to that and null terminator.  */
+  };
+
+#define TRAILING_LIST_MEMBER            h_aliases
+#define TRAILING_LIST_SEPARATOR_P       isspace
+#include <nss/nss_files/files-parse.c>
+LINE_PARSER
+("#",
+ {
+   char *addr;
+
+   STRING_FIELD (addr, isspace, 1);
+
+   assert (af == AF_INET || af == AF_INET6 || af == AF_UNSPEC);
+
+   /* Parse address.  */
+   if (af != AF_INET6 && inet_pton (AF_INET, addr, entdata->host_addr) > 0)
+     {
+       assert ((flags & AI_V4MAPPED) == 0 || af != AF_UNSPEC);
+       if (flags & AI_V4MAPPED)
+	 {
+	   map_v4v6_address ((char *) entdata->host_addr,
+			     (char *) entdata->host_addr);
+	   result->h_addrtype = AF_INET6;
+	   result->h_length = IN6ADDRSZ;
+	 }
+       else
+	 {
+	   result->h_addrtype = AF_INET;
+	   result->h_length = INADDRSZ;
+	 }
+     }
+   else if (af != AF_INET
+	    && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
+     {
+       result->h_addrtype = AF_INET6;
+       result->h_length = IN6ADDRSZ;
+     }
+   else
+     /* Illegal address: ignore line.  */
+     return 0;
+
+   /* Store a pointer to the address in the expected form.  */
+   entdata->h_addr_ptrs[0] = (char *) entdata->host_addr;
+   entdata->h_addr_ptrs[1] = NULL;
+   result->h_addr_list = entdata->h_addr_ptrs;
+
+   STRING_FIELD (result->h_name, isspace, 1);
+ })
+
+
+__libc_lock_define_initialized (static, lock)
+
+static bool_t new_start = 1;
+static char *oldkey = NULL;
+static int oldkeylen = 0;
+
+
+enum nss_status
+_nss_nis_sethostent (int stayopen)
+{
+  __libc_lock_lock (lock);
+
+  new_start = 1;
+  if (oldkey != NULL)
+    {
+      free (oldkey);
+      oldkey = NULL;
+      oldkeylen = 0;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+/* Make _nss_nis_endhostent an alias of _nss_nis_sethostent.  We do this
+   even though the prototypes don't match.  The argument of sethostent
+   is used so this makes no difference.  */
+strong_alias (_nss_nis_sethostent, _nss_nis_endhostent)
+
+
+/* The calling function always need to get a lock first. */
+static enum nss_status
+internal_nis_gethostent_r (struct hostent *host, char *buffer,
+			   size_t buflen, int *errnop, int *h_errnop,
+			   int af, int flags)
+{
+  char *domain;
+  if (__glibc_unlikely (yp_get_default_domain (&domain)))
+    return NSS_STATUS_UNAVAIL;
+
+  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+  buffer += pad;
+
+  struct parser_data *data = (void *) buffer;
+  if (__glibc_unlikely (buflen < sizeof *data + 1 + pad))
+    {
+      *errnop = ERANGE;
+      *h_errnop = NETDB_INTERNAL;
+      return NSS_STATUS_TRYAGAIN;
+    }
+  buflen -= pad;
+
+  /* Get the next entry until we found a correct one. */
+  const size_t linebuflen = buffer + buflen - data->linebuffer;
+  int parse_res;
+  do
+    {
+      char *result;
+      int len;
+      char *outkey;
+      int keylen;
+      int yperr;
+      if (new_start)
+	yperr = yp_first (domain, "hosts.byname", &outkey, &keylen, &result,
+			  &len);
+      else
+	yperr = yp_next (domain, "hosts.byname", oldkey, oldkeylen, &outkey,
+			 &keylen, &result, &len);
+
+      if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+	{
+	  enum nss_status retval = yperr2nss (yperr);
+
+	  switch (retval)
+	    {
+	    case NSS_STATUS_TRYAGAIN:
+	      *errnop = errno;
+	      *h_errnop = TRY_AGAIN;
+	      break;
+	    case NSS_STATUS_NOTFOUND:
+	      *h_errnop = HOST_NOT_FOUND;
+	      break;
+	    default:
+	      *h_errnop = NO_RECOVERY;
+	      break;
+	    }
+	  return retval;
+	}
+
+      if (__glibc_unlikely ((size_t) (len + 1) > linebuflen))
+	{
+	  free (result);
+	  *h_errnop = NETDB_INTERNAL;
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      char *p = strncpy (data->linebuffer, result, len);
+      data->linebuffer[len] = '\0';
+      while (isspace (*p))
+	++p;
+      free (result);
+
+      parse_res = parse_line (p, host, data, buflen, errnop, af, flags);
+      if (__glibc_unlikely (parse_res == -1))
+	{
+	  free (outkey);
+	  *h_errnop = NETDB_INTERNAL;
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+      free (oldkey);
+      oldkey = outkey;
+      oldkeylen = keylen;
+      new_start = 0;
+    }
+  while (!parse_res);
+
+  *h_errnop = NETDB_SUCCESS;
+  return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_nis_gethostent_r (struct hostent *host, char *buffer, size_t buflen,
+		       int *errnop, int *h_errnop)
+{
+  enum nss_status status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_nis_gethostent_r (host, buffer, buflen, errnop, h_errnop,
+			(res_use_inet6 () ? AF_INET6 : AF_INET),
+			(res_use_inet6 () ? AI_V4MAPPED : 0 ));
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+
+static enum nss_status
+internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
+			   char *buffer, size_t buflen, int *errnop,
+			   int *h_errnop, int flags)
+{
+  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+  buffer += pad;
+
+  struct parser_data *data = (void *) buffer;
+
+  if (name == NULL)
+    {
+      *errnop = EINVAL;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  char *domain;
+  if (yp_get_default_domain (&domain))
+    return NSS_STATUS_UNAVAIL;
+
+  if (buflen < sizeof *data + 1 + pad)
+    {
+      *h_errnop = NETDB_INTERNAL;
+      *errnop = ERANGE;
+      return NSS_STATUS_TRYAGAIN;
+    }
+  buflen -= pad;
+
+  /* Convert name to lowercase.  */
+  size_t namlen = strlen (name);
+  /* Limit name length to the maximum size of an RPC packet.  */
+  if (namlen > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  char name2[namlen + 1];
+  size_t i;
+
+  for (i = 0; i < namlen; ++i)
+    name2[i] = tolower (name[i]);
+  name2[i] = '\0';
+
+  char *result;
+  int len;
+  int yperr = yp_match (domain, "hosts.byname", name2, namlen, &result, &len);
+
+  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+    {
+      enum nss_status retval = yperr2nss (yperr);
+
+      if (retval == NSS_STATUS_TRYAGAIN)
+	{
+	  *h_errnop = TRY_AGAIN;
+	  *errnop = errno;
+	}
+      if (retval == NSS_STATUS_NOTFOUND)
+	*h_errnop = HOST_NOT_FOUND;
+      return retval;
+    }
+
+  const size_t linebuflen = buffer + buflen - data->linebuffer;
+  if (__glibc_unlikely ((size_t) (len + 1) > linebuflen))
+    {
+      free (result);
+      *h_errnop = NETDB_INTERNAL;
+      *errnop = ERANGE;
+      return NSS_STATUS_TRYAGAIN;
+    }
+
+  char *p = strncpy (data->linebuffer, result, len);
+  data->linebuffer[len] = '\0';
+  while (isspace (*p))
+    ++p;
+  free (result);
+
+  int parse_res = parse_line (p, host, data, buflen, errnop, af, flags);
+
+  if (__glibc_unlikely (parse_res < 1 || host->h_addrtype != af))
+    {
+      if (parse_res == -1)
+	{
+	  *h_errnop = NETDB_INTERNAL;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+      else
+	{
+	  *h_errnop = HOST_NOT_FOUND;
+	  return NSS_STATUS_NOTFOUND;
+	}
+    }
+
+  *h_errnop = NETDB_SUCCESS;
+  return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_nis_gethostbyname2_r (const char *name, int af, struct hostent *host,
+			   char *buffer, size_t buflen, int *errnop,
+			   int *h_errnop)
+{
+  if (af != AF_INET && af != AF_INET6)
+    {
+      *h_errnop = HOST_NOT_FOUND;
+      return NSS_STATUS_NOTFOUND;
+    }
+
+  return internal_gethostbyname2_r (name, af, host, buffer, buflen, errnop,
+				    h_errnop,
+			(res_use_inet6 () ? AI_V4MAPPED : 0));
+}
+
+
+enum nss_status
+_nss_nis_gethostbyname_r (const char *name, struct hostent *host, char *buffer,
+			  size_t buflen, int *errnop, int *h_errnop)
+{
+  if (res_use_inet6 ())
+    {
+      enum nss_status status;
+
+      status = internal_gethostbyname2_r (name, AF_INET6, host, buffer, buflen,
+					  errnop, h_errnop, AI_V4MAPPED);
+      if (status == NSS_STATUS_SUCCESS)
+	return status;
+    }
+
+  return internal_gethostbyname2_r (name, AF_INET, host, buffer, buflen,
+				    errnop, h_errnop, 0);
+}
+
+
+enum nss_status
+_nss_nis_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
+			  struct hostent *host, char *buffer, size_t buflen,
+			  int *errnop, int *h_errnop)
+{
+  char *domain;
+  if (__glibc_unlikely (yp_get_default_domain (&domain)))
+    return NSS_STATUS_UNAVAIL;
+
+  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+  buffer += pad;
+
+  struct parser_data *data = (void *) buffer;
+  if (__glibc_unlikely (buflen < sizeof *data + 1 + pad))
+    {
+      *errnop = ERANGE;
+      *h_errnop = NETDB_INTERNAL;
+      return NSS_STATUS_TRYAGAIN;
+    }
+  buflen -= pad;
+
+  char *buf = inet_ntoa (*(const struct in_addr *) addr);
+
+  char *result;
+  int len;
+  int yperr = yp_match (domain, "hosts.byaddr", buf, strlen (buf), &result,
+			&len);
+
+  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+    {
+      enum nss_status retval = yperr2nss (yperr);
+
+      if (retval == NSS_STATUS_TRYAGAIN)
+	{
+	  *h_errnop = TRY_AGAIN;
+	  *errnop = errno;
+	}
+      else if (retval == NSS_STATUS_NOTFOUND)
+	*h_errnop = HOST_NOT_FOUND;
+
+      return retval;
+    }
+
+  const size_t linebuflen = buffer + buflen - data->linebuffer;
+  if (__glibc_unlikely ((size_t) (len + 1) > linebuflen))
+    {
+      free (result);
+      *errnop = ERANGE;
+      *h_errnop = NETDB_INTERNAL;
+      return NSS_STATUS_TRYAGAIN;
+    }
+
+  char *p = strncpy (data->linebuffer, result, len);
+  data->linebuffer[len] = '\0';
+  while (isspace (*p))
+    ++p;
+  free (result);
+
+  int parse_res = parse_line (p, host, data, buflen, errnop, af,
+			      (res_use_inet6 () ? AI_V4MAPPED : 0));
+  if (__glibc_unlikely (parse_res < 1))
+    {
+      if (parse_res == -1)
+	{
+	  *h_errnop = NETDB_INTERNAL;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+      else
+	{
+	  *h_errnop = HOST_NOT_FOUND;
+	  return NSS_STATUS_NOTFOUND;
+	}
+    }
+
+  *h_errnop = NETDB_SUCCESS;
+  return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_nis_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat,
+			   char *buffer, size_t buflen, int *errnop,
+			   int *herrnop, int32_t *ttlp)
+{
+  char *domain;
+  if (yp_get_default_domain (&domain))
+    {
+      *herrnop = NO_DATA;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  /* Convert name to lowercase.  */
+  size_t namlen = strlen (name);
+  /* Limit name length to the maximum size of an RPC packet.  */
+  if (namlen > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  char name2[namlen + 1];
+  size_t i;
+
+  for (i = 0; i < namlen; ++i)
+    name2[i] = tolower (name[i]);
+  name2[i] = '\0';
+
+  char *result;
+  int len;
+  int yperr = yp_match (domain, "hosts.byname", name2, namlen, &result, &len);
+
+  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+    {
+      enum nss_status retval = yperr2nss (yperr);
+
+      if (retval == NSS_STATUS_TRYAGAIN)
+	{
+	  *herrnop = TRY_AGAIN;
+	  *errnop = errno;
+	}
+      if (retval == NSS_STATUS_NOTFOUND)
+	*herrnop = HOST_NOT_FOUND;
+      return retval;
+    }
+
+  if (*pat == NULL)
+    {
+      uintptr_t pad = (-(uintptr_t) buffer
+		       % __alignof__ (struct gaih_addrtuple));
+      buffer += pad;
+      buflen = buflen > pad ? buflen - pad : 0;
+
+      if (__glibc_unlikely (buflen < sizeof (struct gaih_addrtuple)))
+	{
+	erange:
+	  free (result);
+	  *errnop = ERANGE;
+	  *herrnop = NETDB_INTERNAL;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      *pat = (struct gaih_addrtuple *) buffer;
+      buffer += sizeof (struct gaih_addrtuple);
+      buflen -= sizeof (struct gaih_addrtuple);
+    }
+
+  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+  buffer += pad;
+
+  struct parser_data *data = (void *) buffer;
+
+  if (__glibc_unlikely (buflen < sizeof *data + 1 + pad))
+    goto erange;
+  buflen -= pad;
+
+  struct hostent host;
+  int parse_res = parse_line (result, &host, data, buflen, errnop, AF_UNSPEC,
+			      0);
+  if (__glibc_unlikely (parse_res < 1))
+    {
+      if (parse_res == -1)
+	{
+	  *herrnop = NETDB_INTERNAL;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+      else
+	{
+	  *herrnop = HOST_NOT_FOUND;
+	  return NSS_STATUS_NOTFOUND;
+	}
+    }
+
+  (*pat)->next = NULL;
+  (*pat)->family = host.h_addrtype;
+  memcpy ((*pat)->addr, host.h_addr_list[0], host.h_length);
+  (*pat)->scopeid = 0;
+  assert (host.h_addr_list[1] == NULL);
+
+  /* Undo the alignment for parser_data.  */
+  buffer -= pad;
+  buflen += pad;
+
+  size_t h_name_len = strlen (host.h_name) + 1;
+  if (h_name_len >= buflen)
+    goto erange;
+  (*pat)->name = memcpy (buffer, host.h_name, h_name_len);
+
+  free (result);
+
+  return NSS_STATUS_SUCCESS;
+}