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, 235 insertions, 0 deletions

diff --git a/REORG.TODO/nis/nss_nis/nis-spwd.c b/REORG.TODO/nis/nss_nis/nis-spwd.c
new file mode 100644
index 0000000000..45e9d964d2
--- /dev/null
+++ b/REORG.TODO/nis/nss_nis/nis-spwd.c
@@ -0,0 +1,235 @@
+/* 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>
+/* The following is an ugly trick to avoid a prototype declaration for
+   _nss_nis_endspent.  */
+#define _nss_nis_endspent _nss_nis_endspent_XXX
+#include <shadow.h>
+#undef _nss_nis_endspent
+#include <libc-lock.h>
+#include <rpcsvc/yp.h>
+#include <rpcsvc/ypclnt.h>
+
+#include "nss-nis.h"
+#include <libnsl.h>
+
+/* Get the declaration of the parser function.  */
+#define ENTNAME spent
+#define STRUCTURE spwd
+#define EXTERN_PARSER
+#include <nss/nss_files/files-parse.c>
+
+/* Protect global state against multiple changers */
+__libc_lock_define_initialized (static, lock)
+
+static bool new_start = true;
+static bool ent_adjunct_used;
+static char *oldkey;
+static int oldkeylen;
+
+enum nss_status
+_nss_nis_setspent (int stayopen)
+{
+  __libc_lock_lock (lock);
+
+  new_start = true;
+  ent_adjunct_used = false;
+  free (oldkey);
+  oldkey = NULL;
+  oldkeylen = 0;
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+/* Make _nss_nis_endspent an alias of _nss_nis_setspent.  We do this
+   even though the prototypes don't match.  The argument of setspent
+   is not used so this makes no difference.  */
+strong_alias (_nss_nis_setspent, _nss_nis_endspent)
+
+static enum nss_status
+internal_nis_getspent_r (struct spwd *sp, char *buffer, size_t buflen,
+			 int *errnop)
+{
+  char *domain;
+  if (__glibc_unlikely (yp_get_default_domain (&domain)))
+    return NSS_STATUS_UNAVAIL;
+
+  /* Get the next entry until we found a correct one. */
+  int parse_res;
+  do
+    {
+      char *result;
+      char *outkey;
+      int len;
+      int keylen;
+      int yperr;
+
+      if (new_start)
+	{
+	  yperr = yp_first (domain, "shadow.byname", &outkey, &keylen, &result,
+			    &len);
+	  if (__builtin_expect (yperr == YPERR_MAP, 0)
+	      && (_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW))
+	    {
+	      free (result);
+	      yperr = yp_first (domain, "passwd.adjunct.byname", &outkey,
+				&keylen, &result, &len);
+	      ent_adjunct_used = true;
+	    }
+	}
+      else
+	yperr = yp_next (domain, (ent_adjunct_used
+				  ? "passwd.adjunct.byname" : "shadow.byname"),
+			 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 (__builtin_expect ((size_t) (len + (ent_adjunct_used ? 3 : 1))
+			    > buflen, 0))
+	{
+	  free (result);
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      char *p = strncpy (buffer, result, len);
+      if (ent_adjunct_used)
+	/* This is an ugly trick.  The format of passwd.adjunct.byname almost
+	   matches the shadow.byname format except that the last two fields
+	   are missing.  Synthesize them by marking them empty.  */
+	strcpy (&buffer[len], "::");
+      else
+	buffer[len] = '\0';
+      while (isspace (*p))
+	++p;
+      free (result);
+
+      parse_res = _nss_files_parse_spent (p, sp, (void *) buffer, buflen,
+					  errnop);
+      if (__builtin_expect  (parse_res == -1, 0))
+	{
+	  free (outkey);
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+
+      free (oldkey);
+      oldkey = outkey;
+      oldkeylen = keylen;
+      new_start = false;
+    }
+  while (!parse_res);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_getspent_r (struct spwd *result, char *buffer, size_t buflen,
+		     int *errnop)
+{
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_nis_getspent_r (result, buffer, buflen, errnop);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+enum nss_status
+_nss_nis_getspnam_r (const char *name, struct spwd *sp,
+		     char *buffer, size_t buflen, int *errnop)
+{
+  if (name == NULL)
+    {
+      *errnop = EINVAL;
+      return NSS_STATUS_UNAVAIL;
+    }
+  const size_t name_len = strlen (name);
+
+  char *domain;
+  if (__glibc_unlikely (yp_get_default_domain (&domain)))
+    return NSS_STATUS_UNAVAIL;
+
+  bool adjunct_used = false;
+  char *result;
+  int len;
+  int yperr = yp_match (domain, "shadow.byname", name, name_len, &result,
+			&len);
+  if (__builtin_expect (yperr == YPERR_MAP, 0)
+      && (_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW))
+    {
+      free (result);
+      yperr = yp_match (domain, "passwd.adjunct.byname", name, name_len,
+			&result, &len);
+      adjunct_used = true;
+    }
+
+  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 + (adjunct_used ? 3 : 1)) > buflen))
+    {
+      free (result);
+      *errnop = ERANGE;
+      return NSS_STATUS_TRYAGAIN;
+    }
+
+  char *p = strncpy (buffer, result, len);
+  if (__builtin_expect (adjunct_used, false))
+    /* This is an ugly trick.  The format of passwd.adjunct.byname almost
+       matches the shadow.byname format except that the last two fields
+       are missing.  Synthesize them by marking them empty.  */
+    strcpy (&buffer[len], "::");
+  else
+    buffer[len] = '\0';
+  while (isspace (*p))
+    ++p;
+  free (result);
+
+  int parse_res = _nss_files_parse_spent (p, sp, (void *) 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;
+}