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, 289 insertions, 0 deletions

diff --git a/REORG.TODO/nscd/nscd_netgroup.c b/REORG.TODO/nscd/nscd_netgroup.c
new file mode 100644
index 0000000000..44f37ef957
--- /dev/null
+++ b/REORG.TODO/nscd/nscd_netgroup.c
@@ -0,0 +1,289 @@
+/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+   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 <alloca.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <not-cancel.h>
+
+#include "nscd-client.h"
+#include "nscd_proto.h"
+
+int __nss_not_use_nscd_netgroup;
+
+
+libc_locked_map_ptr (static, map_handle);
+/* Note that we only free the structure if necessary.  The memory
+   mapping is not removed since it is not visible to the malloc
+   handling.  */
+libc_freeres_fn (pw_map_free)
+{
+  if (map_handle.mapped != NO_MAPPING)
+    {
+      void *p = map_handle.mapped;
+      map_handle.mapped = NO_MAPPING;
+      free (p);
+    }
+}
+
+
+int
+__nscd_setnetgrent (const char *group, struct __netgrent *datap)
+{
+  int gc_cycle;
+  int nretries = 0;
+  size_t group_len = strlen (group) + 1;
+
+  /* If the mapping is available, try to search there instead of
+     communicating with the nscd.  */
+  struct mapped_database *mapped;
+  mapped = __nscd_get_map_ref (GETFDNETGR, "netgroup", &map_handle, &gc_cycle);
+
+ retry:;
+  char *respdata = NULL;
+  int retval = -1;
+  netgroup_response_header netgroup_resp;
+
+  if (mapped != NO_MAPPING)
+    {
+      struct datahead *found = __nscd_cache_search (GETNETGRENT, group,
+						    group_len, mapped,
+						    sizeof netgroup_resp);
+      if (found != NULL)
+	{
+	  respdata = (char *) (&found->data[0].netgroupdata + 1);
+	  netgroup_resp = found->data[0].netgroupdata;
+	  /* Now check if we can trust pw_resp fields.  If GC is
+	     in progress, it can contain anything.  */
+	  if (mapped->head->gc_cycle != gc_cycle)
+	    {
+	      retval = -2;
+	      goto out;
+	    }
+	}
+    }
+
+  int sock = -1;
+  if (respdata == NULL)
+    {
+      sock = __nscd_open_socket (group, group_len, GETNETGRENT,
+				 &netgroup_resp, sizeof (netgroup_resp));
+      if (sock == -1)
+	{
+	  /* nscd not running or wrong version.  */
+	  __nss_not_use_nscd_netgroup = 1;
+	  goto out;
+	}
+    }
+
+  if (netgroup_resp.found == 1)
+    {
+      size_t datalen = netgroup_resp.result_len;
+
+      /* If we do not have to read the data here it comes from the
+	 mapped data and does not have to be freed.  */
+      if (respdata == NULL)
+	{
+	  /* The data will come via the socket.  */
+	  respdata = malloc (datalen);
+	  if (respdata == NULL)
+	    goto out_close;
+
+	  if ((size_t) __readall (sock, respdata, datalen) != datalen)
+	    {
+	      free (respdata);
+	      goto out_close;
+	    }
+	}
+
+      datap->data = respdata;
+      datap->data_size = datalen;
+      datap->cursor = respdata;
+      datap->first = 1;
+      datap->nip = (service_user *) -1l;
+      datap->known_groups = NULL;
+      datap->needed_groups = NULL;
+
+      retval = 1;
+    }
+  else
+    {
+      if (__glibc_unlikely (netgroup_resp.found == -1))
+	{
+	  /* The daemon does not cache this database.  */
+	  __nss_not_use_nscd_netgroup = 1;
+	  goto out_close;
+	}
+
+      /* Set errno to 0 to indicate no error, just no found record.  */
+      __set_errno (0);
+      /* Even though we have not found anything, the result is zero.  */
+      retval = 0;
+    }
+
+ out_close:
+  if (sock != -1)
+    close_not_cancel_no_status (sock);
+ out:
+  if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0)
+    {
+      /* When we come here this means there has been a GC cycle while we
+	 were looking for the data.  This means the data might have been
+	 inconsistent.  Retry if possible.  */
+      if ((gc_cycle & 1) != 0 || ++nretries == 5 || retval == -1)
+	{
+	  /* nscd is just running gc now.  Disable using the mapping.  */
+	  if (atomic_decrement_val (&mapped->counter) == 0)
+	    __nscd_unmap (mapped);
+	  mapped = NO_MAPPING;
+	}
+
+      if (retval != -1)
+	goto retry;
+    }
+
+  return retval;
+}
+
+
+int
+__nscd_innetgr (const char *netgroup, const char *host, const char *user,
+		const char *domain)
+{
+  size_t key_len = (strlen (netgroup) + strlen (host ?: "")
+		    + strlen (user ?: "") + strlen (domain ?: "") + 7);
+  char *key;
+  bool use_alloca = __libc_use_alloca (key_len);
+  if (use_alloca)
+    key = alloca (key_len);
+  else
+    {
+      key = malloc (key_len);
+      if (key == NULL)
+	return -1;
+    }
+  char *wp = stpcpy (key, netgroup) + 1;
+  if (host != NULL)
+    {
+      *wp++ = '\1';
+      wp = stpcpy (wp, host) + 1;
+    }
+  else
+    *wp++ = '\0';
+  if (user != NULL)
+    {
+      *wp++ = '\1';
+      wp = stpcpy (wp, user) + 1;
+    }
+  else
+    *wp++ = '\0';
+  if (domain != NULL)
+    {
+      *wp++ = '\1';
+      wp = stpcpy (wp, domain) + 1;
+    }
+  else
+    *wp++ = '\0';
+  key_len = wp - key;
+
+  /* If the mapping is available, try to search there instead of
+     communicating with the nscd.  */
+  int gc_cycle;
+  int nretries = 0;
+  struct mapped_database *mapped;
+  mapped = __nscd_get_map_ref (GETFDNETGR, "netgroup", &map_handle, &gc_cycle);
+
+ retry:;
+  int retval = -1;
+  innetgroup_response_header innetgroup_resp;
+  int sock = -1;
+
+  if (mapped != NO_MAPPING)
+    {
+      struct datahead *found = __nscd_cache_search (INNETGR, key,
+						    key_len, mapped,
+						    sizeof innetgroup_resp);
+      if (found != NULL)
+	{
+	  innetgroup_resp = found->data[0].innetgroupdata;
+	  /* Now check if we can trust pw_resp fields.  If GC is
+	     in progress, it can contain anything.  */
+	  if (mapped->head->gc_cycle != gc_cycle)
+	    {
+	      retval = -2;
+	      goto out;
+	    }
+
+	  goto found_entry;
+	}
+    }
+
+  sock = __nscd_open_socket (key, key_len, INNETGR,
+			     &innetgroup_resp, sizeof (innetgroup_resp));
+  if (sock == -1)
+    {
+      /* nscd not running or wrong version.  */
+      __nss_not_use_nscd_netgroup = 1;
+      goto out;
+    }
+
+ found_entry:
+  if (innetgroup_resp.found == 1)
+    retval = innetgroup_resp.result;
+  else
+    {
+      if (__glibc_unlikely (innetgroup_resp.found == -1))
+	{
+	  /* The daemon does not cache this database.  */
+	  __nss_not_use_nscd_netgroup = 1;
+	  goto out_close;
+	}
+
+      /* Set errno to 0 to indicate no error, just no found record.  */
+      __set_errno (0);
+      /* Even though we have not found anything, the result is zero.  */
+      retval = 0;
+    }
+
+ out_close:
+  if (sock != -1)
+    close_not_cancel_no_status (sock);
+ out:
+  if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0)
+    {
+      /* When we come here this means there has been a GC cycle while we
+	 were looking for the data.  This means the data might have been
+	 inconsistent.  Retry if possible.  */
+      if ((gc_cycle & 1) != 0 || ++nretries == 5 || retval == -1)
+	{
+	  /* nscd is just running gc now.  Disable using the mapping.  */
+	  if (atomic_decrement_val (&mapped->counter) == 0)
+	    __nscd_unmap (mapped);
+	  mapped = NO_MAPPING;
+	}
+
+      if (retval != -1)
+	goto retry;
+    }
+
+  if (! use_alloca)
+    free (key);
+
+  return retval;
+}