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, 148 insertions, 0 deletions

diff --git a/REORG.TODO/nis/nss_nisplus/nisplus-initgroups.c b/REORG.TODO/nis/nss_nisplus/nisplus-initgroups.c
new file mode 100644
index 0000000000..95ee623b1c
--- /dev/null
+++ b/REORG.TODO/nis/nss_nisplus/nisplus-initgroups.c
@@ -0,0 +1,148 @@
+/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <nss.h>
+#include <grp.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <libc-lock.h>
+#include <rpcsvc/nis.h>
+
+#include "nss-nisplus.h"
+#include "nisplus-parser.h"
+#include <libnsl.h>
+#include <nis_intern.h>
+#include <nis_xdr.h>
+
+#define NISOBJVAL(col, obj) \
+  ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
+
+#define NISOBJLEN(col, obj) \
+  ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
+
+extern nis_name grp_tablename_val attribute_hidden;
+extern size_t grp_tablename_len attribute_hidden;
+extern enum nss_status _nss_grp_create_tablename (int *errnop);
+
+
+enum nss_status
+_nss_nisplus_initgroups_dyn (const char *user, gid_t group, long int *start,
+			     long int *size, gid_t **groupsp, long int limit,
+			     int *errnop)
+{
+  if (grp_tablename_val == NULL)
+    {
+      enum nss_status status = _nss_grp_create_tablename (errnop);
+
+      if (status != NSS_STATUS_SUCCESS)
+	return status;
+    }
+
+  nis_result *result;
+  char buf[strlen (user) + 12 + grp_tablename_len];
+
+  snprintf (buf, sizeof (buf), "[members=%s],%s", user, grp_tablename_val);
+
+  result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | ALL_RESULTS, 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);
+
+      nis_freeresult (result);
+      return status;
+    }
+
+  if (NIS_RES_NUMOBJ (result) == 0)
+    {
+    errout:
+      nis_freeresult (result);
+      return NSS_STATUS_NOTFOUND;
+    }
+
+  gid_t *groups = *groupsp;
+  nis_object *obj = NIS_RES_OBJECT (result);
+  for (unsigned int cnt = 0; cnt < NIS_RES_NUMOBJ (result); ++cnt, ++obj)
+    {
+      if (__type_of (obj) != NIS_ENTRY_OBJ
+	  || strcmp (obj->EN_data.en_type, "group_tbl") != 0
+	  || obj->EN_data.en_cols.en_cols_len < 4)
+	continue;
+
+      char *numstr = NISOBJVAL (2, obj);
+      size_t len = NISOBJLEN (2, obj);
+      if (len == 0 || numstr[0] == '\0')
+	continue;
+
+      gid_t gid;
+      char *endp;
+      if (__glibc_unlikely (numstr[len - 1] != '\0'))
+	{
+	  char numstrbuf[len + 1];
+	  memcpy (numstrbuf, numstr, len);
+	  numstrbuf[len] = '\0';
+	  gid = strtoul (numstrbuf, &endp, 10);
+	  if (*endp)
+	    continue;
+	}
+      else
+	{
+	  gid = strtoul (numstr, &endp, 10);
+	  if (*endp)
+	    continue;
+	}
+
+      if (gid == group)
+	continue;
+
+      /* Insert this group.  */
+      if (*start == *size)
+	{
+	  /* Need a bigger buffer.  */
+	  long int newsize;
+
+	  if (limit > 0 && *size == limit)
+	    /* We reached the maximum.  */
+	    break;
+
+	  if (limit <= 0)
+	    newsize = 2 * *size;
+	  else
+	    newsize = MIN (limit, 2 * *size);
+
+	  gid_t *newgroups = realloc (groups, newsize * sizeof (*groups));
+	  if (newgroups == NULL)
+	    goto errout;
+	  *groupsp = groups = newgroups;
+	  *size = newsize;
+	}
+
+      groups[*start] = gid;
+      *start += 1;
+    }
+
+  nis_freeresult (result);
+  return NSS_STATUS_SUCCESS;
+}