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-rw-r--r--REORG.TODO/nis/nss_nis/nis-alias.c281
1 files changed, 281 insertions, 0 deletions
diff --git a/REORG.TODO/nis/nss_nis/nis-alias.c b/REORG.TODO/nis/nss_nis/nis-alias.c
new file mode 100644
index 0000000000..c9c89db6ce
--- /dev/null
+++ b/REORG.TODO/nis/nss_nis/nis-alias.c
@@ -0,0 +1,281 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.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 <nss.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <aliases.h>
+#include <libc-lock.h>
+#include <rpcsvc/yp.h>
+#include <rpcsvc/ypclnt.h>
+
+#include "nss-nis.h"
+
+__libc_lock_define_initialized (static, lock)
+
+static bool_t new_start = 1;
+static char *oldkey;
+static int oldkeylen;
+
+static int
+_nss_nis_parse_aliasent (const char *key, char *alias, struct aliasent *result,
+			 char *buffer, size_t buflen, int *errnop)
+{
+  char *first_unused = buffer + strlen (alias) + 1;
+  size_t room_left =
+    buflen - (buflen % __alignof__ (char *)) - strlen (alias) - 2;
+  char *line;
+  char *cp;
+
+  result->alias_members_len = 0;
+  *first_unused = '\0';
+  first_unused++;
+  strcpy (first_unused, key);
+
+  if (first_unused[room_left - 1] != '\0')
+    {
+      /* The line is too long for our buffer.  */
+    no_more_room:
+      *errnop = ERANGE;
+      return -1;
+    }
+
+  result->alias_name = first_unused;
+
+  /* Terminate the line for any case.  */
+  cp = strpbrk (alias, "#\n");
+  if (cp != NULL)
+    *cp = '\0';
+
+  first_unused += strlen (result->alias_name) + 1;
+  /* Adjust the pointer so it is aligned for
+     storing pointers.  */
+  first_unused += __alignof__ (char *) - 1;
+  first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
+  result->alias_members = (char **) first_unused;
+
+  line = alias;
+
+  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 *);
+      result->alias_members[result->alias_members_len] = line;
+
+      while (*line != '\0' && *line != ',')
+	line++;
+
+      if (line != result->alias_members[result->alias_members_len])
+	{
+	  *line = '\0';
+	  line++;
+	  result->alias_members_len++;
+	}
+    }
+  return result->alias_members_len == 0 ? 0 : 1;
+}
+
+enum nss_status
+_nss_nis_setaliasent (void)
+{
+  __libc_lock_lock (lock);
+
+  new_start = 1;
+  if (oldkey != NULL)
+    {
+      free (oldkey);
+      oldkey = NULL;
+      oldkeylen = 0;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+/* The 'endaliasent' function is identical.  */
+strong_alias (_nss_nis_setaliasent, _nss_nis_endaliasent)
+
+static enum nss_status
+internal_nis_getaliasent_r (struct aliasent *alias, char *buffer,
+			    size_t buflen, int *errnop)
+{
+  char *domain;
+
+  if (__glibc_unlikely (yp_get_default_domain (&domain)))
+    return NSS_STATUS_UNAVAIL;
+
+  alias->alias_local = 0;
+
+  /* Get the next entry until we found a correct one. */
+  int parse_res;
+  do
+    {
+      char *result;
+      int len;
+      char *outkey;
+      int keylen;
+      int yperr;
+
+      if (new_start)
+	yperr = yp_first (domain, "mail.aliases", &outkey, &keylen, &result,
+			  &len);
+      else
+	yperr = yp_next (domain, "mail.aliases", oldkey, oldkeylen, &outkey,
+			 &keylen, &result, &len);
+
+      if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+	{
+	  enum nss_status retval = yperr2nss (yperr);
+
+	  if (retval == NSS_STATUS_TRYAGAIN)
+	    *errnop = errno;
+	  return retval;
+	}
+
+      if (__glibc_unlikely ((size_t) (len + 1) > buflen))
+	{
+	  free (result);
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+      char *p = strncpy (buffer, result, len);
+      buffer[len] = '\0';
+      while (isspace (*p))
+	++p;
+      free (result);
+
+      parse_res = _nss_nis_parse_aliasent (outkey, p, alias, buffer,
+					   buflen, errnop);
+      if (__glibc_unlikely (parse_res == -1))
+	{
+	  free (outkey);
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      free (oldkey);
+      oldkey = outkey;
+      oldkeylen = keylen;
+      new_start = 0;
+    }
+  while (!parse_res);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_getaliasent_r (struct aliasent *alias, char *buffer, size_t buflen,
+			int *errnop)
+{
+  enum nss_status status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_nis_getaliasent_r (alias, buffer, buflen, errnop);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+enum nss_status
+_nss_nis_getaliasbyname_r (const char *name, struct aliasent *alias,
+			   char *buffer, size_t buflen, int *errnop)
+{
+  if (name == NULL)
+    {
+      *errnop = EINVAL;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  char *domain;
+  if (__glibc_unlikely (yp_get_default_domain (&domain)))
+    return NSS_STATUS_UNAVAIL;
+
+  size_t namlen = strlen (name);
+  char *name2;
+  int use_alloca = __libc_use_alloca (namlen + 1);
+  if (use_alloca)
+    name2 = __alloca (namlen + 1);
+  else
+    {
+      name2 = malloc (namlen + 1);
+      if (name2 == NULL)
+	{
+	  *errnop = ENOMEM;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+    }
+
+  /* Convert name to lowercase.  */
+  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, "mail.aliases", name2, namlen, &result, &len);
+
+  if (!use_alloca)
+    free (name2);
+
+  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
+    {
+      enum nss_status retval = yperr2nss (yperr);
+
+      if (retval == NSS_STATUS_TRYAGAIN)
+	*errnop = errno;
+      return retval;
+    }
+
+  if (__glibc_unlikely ((size_t) (len + 1) > buflen))
+    {
+      free (result);
+      *errnop = ERANGE;
+      return NSS_STATUS_TRYAGAIN;
+    }
+
+  char *p = strncpy (buffer, result, len);
+  buffer[len] = '\0';
+  while (isspace (*p))
+    ++p;
+  free (result);
+
+  alias->alias_local = 0;
+  int parse_res = _nss_nis_parse_aliasent (name, p, alias, buffer, buflen,
+					   errnop);
+  if (__glibc_unlikely (parse_res < 1))
+    {
+      if (parse_res == -1)
+	return NSS_STATUS_TRYAGAIN;
+      else
+	return NSS_STATUS_NOTFOUND;
+    }
+
+  return NSS_STATUS_SUCCESS;
+}