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).

14 files changed, 1021 insertions, 0 deletions

diff --git a/REORG.TODO/gshadow/Makefile b/REORG.TODO/gshadow/Makefile
new file mode 100644
index 0000000000..3558c3fba6
--- /dev/null
+++ b/REORG.TODO/gshadow/Makefile
@@ -0,0 +1,39 @@
+# Copyright (C) 2009-2017 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/>.
+
+#
+#	Makefile for gshadow.
+#
+subdir	:= gshadow
+
+include ../Makeconfig
+
+headers		= gshadow.h
+routines	= getsgent getsgnam sgetsgent fgetsgent putsgent \
+		  getsgent_r getsgnam_r sgetsgent_r fgetsgent_r
+
+tests = tst-gshadow tst-putsgent
+
+CFLAGS-getsgent_r.c = -fexceptions
+CFLAGS-getsgent.c = -fexceptions
+CFLAGS-fgetsgent.c = -fexceptions
+CFLAGS-fgetsgent_r.c = -fexceptions $(libio-mtsafe)
+CFLAGS-putsgent.c = -fexceptions $(libio-mtsafe)
+CFLAGS-getsgnam.c = -fexceptions
+CFLAGS-getsgnam_r.c = -fexceptions
+
+include ../Rules
diff --git a/REORG.TODO/gshadow/Versions b/REORG.TODO/gshadow/Versions
new file mode 100644
index 0000000000..1dba0c5f19
--- /dev/null
+++ b/REORG.TODO/gshadow/Versions
@@ -0,0 +1,21 @@
+libc {
+  GLIBC_2.10 {
+    # e*
+    endsgent;
+
+    # f*
+    fgetsgent; fgetsgent_r;
+
+    # g*
+    getsgent; getsgent_r; getsgnam; getsgnam_r;
+
+    # p*
+    putsgent;
+
+    # s*
+    setsgent;
+
+    # s*
+    sgetsgent; sgetsgent_r;
+  }
+}
diff --git a/REORG.TODO/gshadow/fgetsgent.c b/REORG.TODO/gshadow/fgetsgent.c
new file mode 100644
index 0000000000..848cf3f94b
--- /dev/null
+++ b/REORG.TODO/gshadow/fgetsgent.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 2009-2017 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 <errno.h>
+#include <libc-lock.h>
+#include <gshadow.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+/* A reasonable size for a buffer to start with.  */
+#define BUFLEN_SPWD 1024
+
+/* We need to protect the dynamic buffer handling.  */
+__libc_lock_define_initialized (static, lock);
+
+libc_freeres_ptr (static char *buffer);
+
+/* Read one shadow entry from the given stream.  */
+struct sgrp *
+fgetsgent (FILE *stream)
+{
+  static size_t buffer_size;
+  static struct sgrp resbuf;
+  fpos_t pos;
+  struct sgrp *result;
+  int save;
+
+  if (fgetpos (stream, &pos) != 0)
+    return NULL;
+
+  /* Get lock.  */
+  __libc_lock_lock (lock);
+
+  /* Allocate buffer if not yet available.  */
+  if (buffer == NULL)
+    {
+      buffer_size = BUFLEN_SPWD;
+      buffer = malloc (buffer_size);
+    }
+
+  while (buffer != NULL
+	 && (__fgetsgent_r (stream, &resbuf, buffer, buffer_size, &result)
+	     == ERANGE))
+    {
+      char *new_buf;
+      buffer_size += BUFLEN_SPWD;
+      new_buf = realloc (buffer, buffer_size);
+      if (new_buf == NULL)
+	{
+	  /* We are out of memory.  Free the current buffer so that the
+	     process gets a chance for a normal termination.  */
+	  save = errno;
+	  free (buffer);
+	  __set_errno (save);
+	}
+      buffer = new_buf;
+
+      /* Reset the stream.  */
+      if (fsetpos (stream, &pos) != 0)
+	buffer = NULL;
+    }
+
+  if (buffer == NULL)
+    result = NULL;
+
+  /* Release lock.  Preserve error value.  */
+  save = errno;
+  __libc_lock_unlock (lock);
+  __set_errno (save);
+
+  return result;
+}
diff --git a/REORG.TODO/gshadow/fgetsgent_r.c b/REORG.TODO/gshadow/fgetsgent_r.c
new file mode 100644
index 0000000000..f1d0650333
--- /dev/null
+++ b/REORG.TODO/gshadow/fgetsgent_r.c
@@ -0,0 +1,75 @@
+/* Copyright (C) 2009-2017 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 <ctype.h>
+#include <errno.h>
+#include <gshadow.h>
+#include <stdio.h>
+
+/* Define a line parsing function using the common code
+   used in the nss_files module.  */
+
+#define STRUCTURE	sgrp
+#define ENTNAME		sgent
+#define	EXTERN_PARSER	1
+struct sgent_data {};
+
+#include <nss/nss_files/files-parse.c>
+
+
+/* Read one shadow entry from the given stream.  */
+int
+__fgetsgent_r (FILE *stream, struct sgrp *resbuf, char *buffer, size_t buflen,
+	       struct sgrp **result)
+{
+  char *p;
+
+  _IO_flockfile (stream);
+  do
+    {
+      buffer[buflen - 1] = '\xff';
+      p = fgets_unlocked (buffer, buflen, stream);
+      if (p == NULL && feof_unlocked (stream))
+	{
+	  _IO_funlockfile (stream);
+	  *result = NULL;
+	  __set_errno (ENOENT);
+	  return errno;
+	}
+      if (p == NULL || buffer[buflen - 1] != '\xff')
+	{
+	  _IO_funlockfile (stream);
+	  *result = NULL;
+	  __set_errno (ERANGE);
+	  return errno;
+	}
+
+      /* Skip leading blanks.  */
+      while (isspace (*p))
+	++p;
+    } while (*p == '\0' || *p == '#' ||	/* Ignore empty and comment lines.  */
+	     /* Parse the line.  If it is invalid, loop to
+		get the next line of the file to parse.  */
+	     ! parse_line (buffer, (void *) resbuf, (void *) buffer, buflen,
+			   &errno));
+
+  _IO_funlockfile (stream);
+
+  *result = resbuf;
+  return 0;
+}
+weak_alias (__fgetsgent_r, fgetsgent_r)
diff --git a/REORG.TODO/gshadow/getsgent.c b/REORG.TODO/gshadow/getsgent.c
new file mode 100644
index 0000000000..6bb16e44f3
--- /dev/null
+++ b/REORG.TODO/gshadow/getsgent.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+   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 <gshadow.h>
+
+
+#define LOOKUP_TYPE	struct sgrp
+#define SETFUNC_NAME	setsgent
+#define	GETFUNC_NAME	getsgent
+#define	ENDFUNC_NAME	endsgent
+#define DATABASE_NAME	gshadow
+#define BUFLEN		1024
+
+/* There is no nscd support for the shadow file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXent.c"
diff --git a/REORG.TODO/gshadow/getsgent_r.c b/REORG.TODO/gshadow/getsgent_r.c
new file mode 100644
index 0000000000..8b4b8bf9bf
--- /dev/null
+++ b/REORG.TODO/gshadow/getsgent_r.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+   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 <gshadow.h>
+
+
+#define LOOKUP_TYPE		struct sgrp
+#define SETFUNC_NAME		setsgent
+#define	GETFUNC_NAME		getsgent
+#define	ENDFUNC_NAME		endsgent
+#define DATABASE_NAME		gshadow
+#define BUFLEN			1024
+#define NO_COMPAT_NEEDED	1
+
+/* There is no nscd support for the shadow file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXent_r.c"
diff --git a/REORG.TODO/gshadow/getsgnam.c b/REORG.TODO/gshadow/getsgnam.c
new file mode 100644
index 0000000000..12adf3fad8
--- /dev/null
+++ b/REORG.TODO/gshadow/getsgnam.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+   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 <gshadow.h>
+
+
+#define LOOKUP_TYPE	struct sgrp
+#define FUNCTION_NAME	getsgnam
+#define DATABASE_NAME	gshadow
+#define ADD_PARAMS	const char *name
+#define ADD_VARIABLES	name
+#define BUFLEN		1024
+
+/* There is no nscd support for the shadow file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXbyYY.c"
diff --git a/REORG.TODO/gshadow/getsgnam_r.c b/REORG.TODO/gshadow/getsgnam_r.c
new file mode 100644
index 0000000000..3ed1d5c8c0
--- /dev/null
+++ b/REORG.TODO/gshadow/getsgnam_r.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+   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 <gshadow.h>
+
+
+#define LOOKUP_TYPE		struct sgrp
+#define FUNCTION_NAME		getsgnam
+#define DATABASE_NAME		gshadow
+#define ADD_PARAMS		const char *name
+#define ADD_VARIABLES		name
+#define BUFLEN			1024
+#define NO_COMPAT_NEEDED	1
+
+/* There is no nscd support for the shadow file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXbyYY_r.c"
diff --git a/REORG.TODO/gshadow/gshadow.h b/REORG.TODO/gshadow/gshadow.h
new file mode 100644
index 0000000000..70ab83ddbd
--- /dev/null
+++ b/REORG.TODO/gshadow/gshadow.h
@@ -0,0 +1,128 @@
+/* Copyright (C) 2009-2017 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/>.  */
+
+/* Declaration of types and functions for shadow group suite.  */
+
+#ifndef _GSHADOW_H
+#define _GSHADOW_H	1
+
+#include <features.h>
+#include <paths.h>
+#include <bits/types/FILE.h>
+
+#define __need_size_t
+#include <stddef.h>
+
+/* Path to the user database files.  */
+#define	GSHADOW _PATH_GSHADOW
+
+
+__BEGIN_DECLS
+
+/* Structure of the group file.  */
+struct sgrp
+  {
+    char *sg_namp;		/* Group name.  */
+    char *sg_passwd;		/* Encrypted password.  */
+    char **sg_adm;		/* Group administrator list.  */
+    char **sg_mem;		/* Group member list.  */
+  };
+
+
+/* Open database for reading.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern void setsgent (void);
+
+/* Close database.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern void endsgent (void);
+
+/* Get next entry from database, perhaps after opening the file.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern struct sgrp *getsgent (void);
+
+/* Get shadow entry matching NAME.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern struct sgrp *getsgnam (const char *__name);
+
+/* Read shadow entry from STRING.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern struct sgrp *sgetsgent (const char *__string);
+
+/* Read next shadow entry from STREAM.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern struct sgrp *fgetsgent (FILE *__stream);
+
+/* Write line containing shadow password entry to stream.
+
+   This function is not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation it is a cancellation point and
+   therefore not marked with __THROW.  */
+extern int putsgent (const struct sgrp *__g, FILE *__stream);
+
+
+#ifdef __USE_MISC
+/* Reentrant versions of some of the functions above.
+
+   These functions are not part of POSIX and therefore no official
+   cancellation point.  But due to similarity with an POSIX interface
+   or due to the implementation they are cancellation points and
+   therefore not marked with __THROW.  */
+extern int getsgent_r (struct sgrp *__result_buf, char *__buffer,
+		       size_t __buflen, struct sgrp **__result);
+
+extern int getsgnam_r (const char *__name, struct sgrp *__result_buf,
+		       char *__buffer, size_t __buflen,
+		       struct sgrp **__result);
+
+extern int sgetsgent_r (const char *__string, struct sgrp *__result_buf,
+			char *__buffer, size_t __buflen,
+			struct sgrp **__result);
+
+extern int fgetsgent_r (FILE *__stream, struct sgrp *__result_buf,
+			char *__buffer, size_t __buflen,
+			struct sgrp **__result);
+#endif	/* misc */
+
+__END_DECLS
+
+#endif /* gshadow.h */
diff --git a/REORG.TODO/gshadow/putsgent.c b/REORG.TODO/gshadow/putsgent.c
new file mode 100644
index 0000000000..4e219c478a
--- /dev/null
+++ b/REORG.TODO/gshadow/putsgent.c
@@ -0,0 +1,81 @@
+/* Copyright (C) 2009-2017 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 <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <gshadow.h>
+#include <nss.h>
+
+#define _S(x)	x ? x : ""
+
+
+/* Write an entry to the given stream.
+   This must know the format of the group file.  */
+int
+putsgent (const struct sgrp *g, FILE *stream)
+{
+  int errors = 0;
+
+  if (g->sg_namp == NULL || !__nss_valid_field (g->sg_namp)
+      || !__nss_valid_field (g->sg_passwd)
+      || !__nss_valid_list_field (g->sg_adm)
+      || !__nss_valid_list_field (g->sg_mem))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  _IO_flockfile (stream);
+
+  if (fprintf (stream, "%s:%s:", g->sg_namp, _S (g->sg_passwd)) < 0)
+    ++errors;
+
+  bool first = true;
+  char **sp = g->sg_adm;
+  if (sp != NULL)
+    while (*sp != NULL)
+      {
+	if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
+	  {
+	    ++errors;
+	    break;
+	  }
+	first = false;
+      }
+  if (putc_unlocked (':', stream) == EOF)
+    ++errors;
+
+  first = true;
+  sp = g->sg_mem;
+  if (sp != NULL)
+    while (*sp != NULL)
+      {
+	if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
+	  {
+	    ++errors;
+	    break;
+	  }
+	first = false;
+      }
+  if (putc_unlocked ('\n', stream) == EOF)
+    ++errors;
+
+  _IO_funlockfile (stream);
+
+  return errors ? -1 : 0;
+}
diff --git a/REORG.TODO/gshadow/sgetsgent.c b/REORG.TODO/gshadow/sgetsgent.c
new file mode 100644
index 0000000000..8d15bf8293
--- /dev/null
+++ b/REORG.TODO/gshadow/sgetsgent.c
@@ -0,0 +1,77 @@
+/* Copyright (C) 2009-2017 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 <errno.h>
+#include <libc-lock.h>
+#include <gshadow.h>
+#include <stdlib.h>
+
+
+/* A reasonable size for a buffer to start with.  */
+#define BUFLEN_SPWD 1024
+
+/* We need to protect the dynamic buffer handling.  */
+__libc_lock_define_initialized (static, lock);
+
+/* Read one shadow entry from the given stream.  */
+struct sgrp *
+sgetsgent (const char *string)
+{
+  static char *buffer;
+  static size_t buffer_size;
+  static struct sgrp resbuf;
+  struct sgrp *result;
+  int save;
+
+  /* Get lock.  */
+  __libc_lock_lock (lock);
+
+  /* Allocate buffer if not yet available.  */
+  if (buffer == NULL)
+    {
+      buffer_size = BUFLEN_SPWD;
+      buffer = malloc (buffer_size);
+    }
+
+  while (buffer != NULL
+	 && __sgetsgent_r (string, &resbuf, buffer, buffer_size, &result) != 0
+	 && errno == ERANGE)
+    {
+      char *new_buf;
+      buffer_size += BUFLEN_SPWD;
+      new_buf = realloc (buffer, buffer_size);
+      if (new_buf == NULL)
+	{
+	  /* We are out of memory.  Free the current buffer so that the
+	     process gets a chance for a normal termination.  */
+	  save = errno;
+	  free (buffer);
+	  __set_errno (save);
+	}
+      buffer = new_buf;
+    }
+
+  if (buffer == NULL)
+    result = NULL;
+
+  /* Release lock.  Preserve error value.  */
+  save = errno;
+  __libc_lock_unlock (lock);
+  __set_errno (save);
+
+  return result;
+}
diff --git a/REORG.TODO/gshadow/sgetsgent_r.c b/REORG.TODO/gshadow/sgetsgent_r.c
new file mode 100644
index 0000000000..b76b7a551a
--- /dev/null
+++ b/REORG.TODO/gshadow/sgetsgent_r.c
@@ -0,0 +1,74 @@
+/* Copyright (C) 2009-2017 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 <ctype.h>
+#include <errno.h>
+#include <gshadow.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Define a line parsing function using the common code
+   used in the nss_files module.  */
+
+#define STRUCTURE	sgrp
+#define ENTNAME		sgent
+struct sgent_data {};
+
+
+#define TRAILING_LIST_MEMBER		sg_mem
+#define TRAILING_LIST_SEPARATOR_P(c)	((c) == ',')
+#include <nss/nss_files/files-parse.c>
+LINE_PARSER
+(,
+ STRING_FIELD (result->sg_namp, ISCOLON, 0);
+ if (line[0] == '\0'
+     && (result->sg_namp[0] == '+' || result->sg_namp[0] == '-'))
+   {
+     result->sg_passwd = NULL;
+     result->sg_adm = NULL;
+     result->sg_mem = NULL;
+   }
+ else
+   {
+     STRING_FIELD (result->sg_passwd, ISCOLON, 0);
+     STRING_LIST (result->sg_adm, ':');
+   }
+ )
+
+
+/* Read one shadow entry from the given stream.  */
+int
+__sgetsgent_r (const char *string, struct sgrp *resbuf, char *buffer,
+	       size_t buflen, struct sgrp **result)
+{
+  char *sp;
+  if (string < buffer || string >= buffer + buflen)
+    {
+      buffer[buflen - 1] = '\0';
+      sp = strncpy (buffer, string, buflen);
+      if (buffer[buflen - 1] != '\0')
+	return ERANGE;
+    }
+  else
+    sp = (char *) string;
+
+  int parse_result = parse_line (sp, resbuf, (void *) buffer, buflen, &errno);
+  *result = parse_result > 0 ? resbuf : NULL;
+
+  return *result == NULL ? errno : 0;
+}
+weak_alias (__sgetsgent_r, sgetsgent_r)
diff --git a/REORG.TODO/gshadow/tst-gshadow.c b/REORG.TODO/gshadow/tst-gshadow.c
new file mode 100644
index 0000000000..8b469b723d
--- /dev/null
+++ b/REORG.TODO/gshadow/tst-gshadow.c
@@ -0,0 +1,141 @@
+#include <gshadow.h>
+#include <stdio.h>
+#include <string.h>
+
+
+static const struct sgrp data[] =
+  {
+    { (char *) "one", (char *) "pwdone",
+      (char *[]) { (char *) "admoneone", (char *) "admonetwo",
+		  (char *) "admonethree", NULL },
+      (char *[]) { (char *) "memoneone", (char *) "memonetwo",
+		  (char *) "memonethree", NULL } },
+    { (char *) "two", (char *) "pwdtwo",
+      (char *[]) { (char *) "admtwoone", (char *) "admtwotwo", NULL },
+      (char *[]) { (char *) "memtwoone", (char *) "memtwotwo",
+		  (char *) "memtwothree", NULL } },
+    { (char *) "three", (char *) "pwdthree",
+      (char *[]) { (char *) "admthreeone", (char *) "admthreetwo", NULL },
+      (char *[]) { (char *) "memthreeone", (char *) "memthreetwo", NULL } },
+    { (char *) "four", (char *) "pwdfour",
+      (char *[]) { (char *) "admfourone", (char *) "admfourtwo", NULL },
+      (char *[]) { NULL } },
+    { (char *) "five", (char *) "pwdfive",
+      (char *[]) { NULL },
+      (char *[]) { (char *) "memfiveone", (char *) "memfivetwo", NULL } },
+  };
+#define ndata (sizeof (data) / sizeof (data[0]))
+
+
+static int
+do_test (void)
+{
+  FILE *fp = tmpfile ();
+  if (fp == NULL)
+    {
+      puts ("cannot open temporary file");
+      return 1;
+    }
+
+  for (size_t i = 0; i < ndata; ++i)
+    if (putsgent (&data[i], fp) != 0)
+      {
+	printf ("putsgent call %zu failed\n", i + 1);
+	return 1;
+      }
+
+  rewind (fp);
+
+  int result = 0;
+  int seen = -1;
+  struct sgrp *g;
+  while ((g = fgetsgent (fp)) != NULL)
+    {
+      ++seen;
+      if (strcmp (g->sg_namp, data[seen].sg_namp) != 0)
+	{
+	  printf ("sg_namp of entry %d does not match: %s vs %s\n",
+		  seen + 1, g->sg_namp, data[seen].sg_namp);
+	  result = 1;
+	}
+      if (strcmp (g->sg_passwd, data[seen].sg_passwd) != 0)
+	{
+	  printf ("sg_passwd of entry %d does not match: %s vs %s\n",
+		  seen + 1, g->sg_passwd, data[seen].sg_passwd);
+	  result = 1;
+	}
+      if (g->sg_adm == NULL)
+	{
+	  printf ("sg_adm of entry %d is NULL\n", seen + 1);
+	  result = 1;
+	}
+      else
+	{
+	  int i = 1;
+	  char **sp1 = g->sg_adm;
+	  char **sp2 = data[seen].sg_adm;
+	  while (*sp1 != NULL && *sp2 != NULL)
+	    {
+	      if (strcmp (*sp1, *sp2) != 0)
+		{
+		  printf ("sg_adm[%d] of entry %d does not match: %s vs %s\n",
+			  i, seen + 1, *sp1, *sp2);
+		  result = 1;
+		}
+	      ++sp1;
+	      ++sp2;
+	      ++i;
+	    }
+	  if (*sp1 == NULL && *sp2 != NULL)
+	    {
+	      printf ("sg_adm of entry %d has too few entries\n", seen + 1);
+	      result = 1;
+	    }
+	  else if (*sp1 != NULL && *sp2 == NULL)
+	    {
+	      printf ("sg_adm of entry %d has too many entries\n", seen + 1);
+	      result = 1;
+	    }
+	}
+      if (g->sg_mem == NULL)
+	{
+	  printf ("sg_mem of entry %d is NULL\n", seen + 1);
+	  result = 1;
+	}
+      else
+	{
+	  int i = 1;
+	  char **sp1 = g->sg_mem;
+	  char **sp2 = data[seen].sg_mem;
+	  while (*sp1 != NULL && *sp2 != NULL)
+	    {
+	      if (strcmp (*sp1, *sp2) != 0)
+		{
+		  printf ("sg_mem[%d] of entry %d does not match: %s vs %s\n",
+			  i, seen + 1, *sp1, *sp2);
+		  result = 1;
+		}
+	      ++sp1;
+	      ++sp2;
+	      ++i;
+	    }
+	  if (*sp1 == NULL && *sp2 != NULL)
+	    {
+	      printf ("sg_mem of entry %d has too few entries\n", seen + 1);
+	      result = 1;
+	    }
+	  else if (*sp1 != NULL && *sp2 == NULL)
+	    {
+	      printf ("sg_mem of entry %d has too many entries\n", seen + 1);
+	      result = 1;
+	    }
+	}
+    }
+
+  fclose (fp);
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/REORG.TODO/gshadow/tst-putsgent.c b/REORG.TODO/gshadow/tst-putsgent.c
new file mode 100644
index 0000000000..218d458779
--- /dev/null
+++ b/REORG.TODO/gshadow/tst-putsgent.c
@@ -0,0 +1,168 @@
+/* Test for processing of invalid gshadow entries.  [BZ #18724]
+   Copyright (C) 2015-2017 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 <errno.h>
+#include <gshadow.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static bool errors;
+
+static void
+check (struct sgrp e, const char *expected)
+{
+  char *buf;
+  size_t buf_size;
+  FILE *f = open_memstream (&buf, &buf_size);
+
+  if (f == NULL)
+    {
+      printf ("open_memstream: %m\n");
+      errors = true;
+      return;
+    }
+
+  int ret = putsgent (&e, f);
+
+  if (expected == NULL)
+    {
+      if (ret == -1)
+	{
+	  if (errno != EINVAL)
+	    {
+	      printf ("putsgent: unexpected error code: %m\n");
+	      errors = true;
+	    }
+	}
+      else
+	{
+	  printf ("putsgent: unexpected success (\"%s\")\n", e.sg_namp);
+	  errors = true;
+	}
+    }
+  else
+    {
+      /* Expect success.  */
+      size_t expected_length = strlen (expected);
+      if (ret == 0)
+	{
+	  long written = ftell (f);
+
+	  if (written <= 0 || fflush (f) < 0)
+	    {
+	      printf ("stream error: %m\n");
+	      errors = true;
+	    }
+	  else if (buf[written - 1] != '\n')
+	    {
+	      printf ("FAILED: \"%s\" without newline\n", expected);
+	      errors = true;
+	    }
+	  else if (strncmp (buf, expected, written - 1) != 0
+		   || written - 1 != expected_length)
+	    {
+	      printf ("FAILED: \"%s\" (%ld), expected \"%s\" (%zu)\n",
+		      buf, written - 1, expected, expected_length);
+	      errors = true;
+	    }
+	}
+      else
+	{
+	  printf ("FAILED: putsgent (expected \"%s\"): %m\n", expected);
+	  errors = true;
+	}
+    }
+
+  fclose (f);
+  free (buf);
+}
+
+static int
+do_test (void)
+{
+  check ((struct sgrp) {
+      .sg_namp = (char *) "root",
+    },
+    "root:::");
+  check ((struct sgrp) {
+      .sg_namp = (char *) "root",
+      .sg_passwd = (char *) "password",
+    },
+    "root:password::");
+  check ((struct sgrp) {
+      .sg_namp = (char *) "root",
+      .sg_passwd = (char *) "password",
+      .sg_adm = (char *[]) {(char *) "adm1", (char *) "adm2", NULL},
+      .sg_mem = (char *[]) {(char *) "mem1", (char *) "mem2", NULL},
+    },
+    "root:password:adm1,adm2:mem1,mem2");
+
+  /* Bad values.  */
+  {
+    static const char *const bad_strings[] = {
+      ":",
+      "\n",
+      ":bad",
+      "\nbad",
+      "b:ad",
+      "b\nad",
+      "bad:",
+      "bad\n",
+      "b:a\nd",
+      ",",
+      "\n,",
+      ":,",
+      ",bad",
+      "b,ad",
+      "bad,",
+      NULL
+    };
+    for (const char *const *bad = bad_strings; *bad != NULL; ++bad)
+      {
+	char *members[]
+	  = {(char *) "first", (char *) *bad, (char *) "last", NULL};
+	if (strpbrk (*bad, ":\n") != NULL)
+	  {
+	    check ((struct sgrp) {
+		.sg_namp = (char *) *bad,
+	      }, NULL);
+	    check ((struct sgrp) {
+		.sg_namp = (char *) "root",
+		.sg_passwd = (char *) *bad,
+	      }, NULL);
+	  }
+	check ((struct sgrp) {
+	    .sg_namp = (char *) "root",
+	    .sg_passwd = (char *) "password",
+	    .sg_adm = members
+	  }, NULL);
+	check ((struct sgrp) {
+	    .sg_namp = (char *) "root",
+	    .sg_passwd = (char *) "password",
+	    .sg_mem = members
+	  }, NULL);
+      }
+  }
+
+  return errors;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"