Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

23 files changed, 1348 insertions, 0 deletions

diff --git a/include/ac/alloca.h b/include/ac/alloca.h
new file mode 100644
index 0000000..2a77f64
--- /dev/null
+++ b/include/ac/alloca.h
@@ -0,0 +1,43 @@
+/* Generic alloca.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_ALLOCA_H
+#define _AC_ALLOCA_H
+
+/*
+ * use of alloca is disallowed as it is machine dependent
+ */
+#error  "alloca() not supported, use malloc()"
+
+/* AIX requires this to be the first thing in the file.  */
+#ifdef __GNUC__
+# define alloca __builtin_alloca
+#else
+# ifdef HAVE_ALLOCA_H
+#  include <alloca.h>
+# else
+#  ifdef _AIX
+#pragma alloca
+#  else
+#   ifndef alloca /* predefined by HP cc +Olibcalls */
+extern char *(alloca)();
+#   endif
+#  endif
+# endif
+#endif
+
+
+#endif /* _AC_ALLOCA_H */
diff --git a/include/ac/assert.h b/include/ac/assert.h
new file mode 100644
index 0000000..062d2ef
--- /dev/null
+++ b/include/ac/assert.h
@@ -0,0 +1,57 @@
+/* Generic assert.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_ASSERT_H
+#define _AC_ASSERT_H
+
+#undef assert
+
+#ifdef LDAP_DEBUG
+
+#if defined( HAVE_ASSERT_H ) || defined( STDC_HEADERS )
+
+#undef NDEBUG
+#include <assert.h>
+
+#else /* !(HAVE_ASSERT_H || STDC_HEADERS) */
+
+#define LDAP_NEED_ASSERT 1
+
+/*
+ * no assert()... must be a very old compiler.
+ * create a replacement and hope it works
+ */
+
+LBER_F (void) ber_pvt_assert LDAP_P(( const char *file, int line,
+	const char *test ));
+
+/* Can't use LDAP_STRING(test), that'd expand to "test" */
+#if defined(__STDC__) || defined(__cplusplus)
+#define assert(test) \
+	((test) ? (void)0 : ber_pvt_assert( __FILE__, __LINE__, #test ) )
+#else
+#define assert(test) \
+	((test) ? (void)0 : ber_pvt_assert( __FILE__, __LINE__, "test" ) )
+#endif
+
+#endif /* (HAVE_ASSERT_H || STDC_HEADERS) */
+
+#else /* !LDAP_DEBUG */
+/* no asserts */
+#define assert(test) ((void)0)
+#endif /* LDAP_DEBUG */
+
+#endif /* _AC_ASSERT_H */
diff --git a/include/ac/bytes.h b/include/ac/bytes.h
new file mode 100644
index 0000000..1d3e345
--- /dev/null
+++ b/include/ac/bytes.h
@@ -0,0 +1,78 @@
+/* Generic bytes.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_BYTES_H
+#define _AC_BYTES_H
+
+/* cross compilers should define both AC_INT{2,4}_TYPE in CPPFLAGS */
+
+#if !defined( AC_INT4_TYPE )
+	/* use autoconf defines to provide sized typedefs */
+#	if SIZEOF_LONG == 4
+#		define AC_INT4_TYPE long
+#	elif SIZEOF_INT == 4
+#		define AC_INT4_TYPE int
+#	elif SIZEOF_SHORT == 4
+#		define AC_INT4_TYPE short
+#	else
+#	error "AC_INT4_TYPE?"
+#	endif
+#endif
+
+typedef AC_INT4_TYPE ac_int4;
+typedef signed AC_INT4_TYPE ac_sint4;
+typedef unsigned AC_INT4_TYPE ac_uint4;
+
+#if !defined( AC_INT2_TYPE )
+#	if SIZEOF_SHORT == 2
+#		define AC_INT2_TYPE short
+#	elif SIZEOF_INT == 2
+#		define AC_INT2_TYPE int
+#	elif SIZEOF_LONG == 2
+#		define AC_INT2_TYPE long
+#	else
+#	error "AC_INT2_TYPE?"
+#	endif
+#endif
+ 
+#if defined( AC_INT2_TYPE )
+typedef AC_INT2_TYPE ac_int2;
+typedef signed AC_INT2_TYPE ac_sint2;
+typedef unsigned AC_INT2_TYPE ac_uint2;
+#endif
+
+#ifndef BYTE_ORDER
+/* cross compilers should define BYTE_ORDER in CPPFLAGS */
+
+/*
+ * Definitions for byte order, according to byte significance from low
+ * address to high.
+ */
+#define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
+#define BIG_ENDIAN  4321        /* MSB first: 68000, ibm, net */
+#define PDP_ENDIAN  3412        /* LSB first in word, MSW first in long */
+
+/* assume autoconf's AC_C_BIGENDIAN has been ran */
+/* if it hasn't, we assume (maybe falsely) the order is LITTLE ENDIAN */
+#	ifdef WORDS_BIGENDIAN
+#		define BYTE_ORDER  BIG_ENDIAN
+#	else
+#		define BYTE_ORDER  LITTLE_ENDIAN
+#	endif
+
+#endif /* BYTE_ORDER */
+
+#endif /* _AC_BYTES_H */
diff --git a/include/ac/crypt.h b/include/ac/crypt.h
new file mode 100644
index 0000000..c152d61
--- /dev/null
+++ b/include/ac/crypt.h
@@ -0,0 +1,29 @@
+/* Generic crypt.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_CRYPT_H
+#define _AC_CRYPT_H
+
+#include <ac/unistd.h>
+
+/* crypt() may be defined in a separate include file */
+#ifdef HAVE_CRYPT_H
+#	include <crypt.h>
+#else
+	extern char *(crypt)();
+#endif
+
+#endif /* _AC_CRYPT_H */
diff --git a/include/ac/ctype.h b/include/ac/ctype.h
new file mode 100644
index 0000000..61daa09
--- /dev/null
+++ b/include/ac/ctype.h
@@ -0,0 +1,33 @@
+/* Generic ctype.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_CTYPE_H
+#define _AC_CTYPE_H
+
+#include <ctype.h>
+
+#undef TOUPPER
+#undef TOLOWER
+
+#ifdef C_UPPER_LOWER
+# define TOUPPER(c)	(islower(c) ? toupper(c) : (c))
+# define TOLOWER(c)	(isupper(c) ? tolower(c) : (c))
+#else
+# define TOUPPER(c)	toupper(c)
+# define TOLOWER(c)	tolower(c)
+#endif
+
+#endif /* _AC_CTYPE_H */
diff --git a/include/ac/dirent.h b/include/ac/dirent.h
new file mode 100644
index 0000000..5cd689d
--- /dev/null
+++ b/include/ac/dirent.h
@@ -0,0 +1,54 @@
+/* Generic dirent.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_DIRENT_H
+#define _AC_DIRENT_H
+
+#ifdef HAVE_DIRENT_H
+# include <dirent.h>
+# define NAMLEN(dirent) strlen((dirent)->d_name)
+#elif defined(_MSC_VER)
+#include <windows.h>
+#ifndef MAX_PATH
+#define MAX_PATH	260
+#endif
+struct dirent {
+	char *d_name;
+};
+typedef struct DIR {
+	HANDLE dir;
+	struct dirent data;
+	int first;
+	char buf[MAX_PATH+1];
+} DIR;
+DIR *opendir(const char *name);
+struct dirent *readdir(DIR *dir);
+int closedir(DIR *dir);
+#else
+# define dirent direct
+# define NAMLEN(dirent) (dirent)->d_namlen
+# ifdef HAVE_SYS_NDIR_H
+#  include <sys/ndir.h>
+# endif
+# ifdef HAVE_SYS_DIR_H
+#  include <sys/dir.h>
+# endif
+# ifdef HAVE_NDIR_H
+#  include <ndir.h>
+# endif
+#endif
+
+#endif /* _AC_DIRENT_H */
diff --git a/include/ac/errno.h b/include/ac/errno.h
new file mode 100644
index 0000000..e712b2e
--- /dev/null
+++ b/include/ac/errno.h
@@ -0,0 +1,55 @@
+/* Generic errno.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_ERRNO_H
+#define _AC_ERRNO_H
+
+#if defined( HAVE_ERRNO_H )
+# include <errno.h>
+#elif defined( HAVE_SYS_ERRNO_H )
+# include <sys/errno.h>
+#endif
+
+#ifndef HAVE_SYS_ERRLIST
+	/* no sys_errlist */
+#	define		sys_nerr	0
+#	define		sys_errlist	((char **)0)
+#elif defined( DECL_SYS_ERRLIST )
+	/* have sys_errlist but need declaration */
+	LDAP_LIBC_V(int)      sys_nerr;
+	LDAP_LIBC_V(char)    *sys_errlist[];
+#endif
+
+#undef _AC_ERRNO_UNKNOWN
+#define _AC_ERRNO_UNKNOWN "unknown error"
+
+#ifdef HAVE_SYS_ERRLIST
+	/* this is thread safe */
+#	define	STRERROR(e) ( (e) > -1 && (e) < sys_nerr \
+			? sys_errlist[(e)] : _AC_ERRNO_UNKNOWN )
+
+#elif defined( HAVE_STRERROR )
+	/* this may not be thread safe */
+	/* and, yes, some implementations of strerror may return NULL */
+#	define	STRERROR(e) ( strerror(e) \
+		? strerror(e) : _AC_ERRNO_UNKNOWN )
+
+#else
+	/* this is thread safe */
+#	define	STRERROR(e) ( _AC_ERRNO_UNKNOWN )
+#endif
+
+#endif /* _AC_ERRNO_H */
diff --git a/include/ac/fdset.h b/include/ac/fdset.h
new file mode 100644
index 0000000..4a96785
--- /dev/null
+++ b/include/ac/fdset.h
@@ -0,0 +1,42 @@
+/* redefine FD_SET */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+/*
+ * This header is to be included by portable.h to ensure
+ * tweaking of FD_SETSIZE is done early enough to be effective.
+ */
+
+#ifndef _AC_FDSET_H
+#define _AC_FDSET_H
+
+#if !defined( OPENLDAP_FD_SETSIZE ) && !defined( FD_SETSIZE )
+#  define OPENLDAP_FD_SETSIZE 4096
+#endif
+
+#ifdef OPENLDAP_FD_SETSIZE
+    /* assume installer desires to enlarge fd_set */
+#  ifdef HAVE_BITS_TYPES_H
+#    include <bits/types.h>
+#  endif
+#  ifdef __FD_SETSIZE
+#    undef __FD_SETSIZE
+#    define __FD_SETSIZE OPENLDAP_FD_SETSIZE
+#  else
+#    define FD_SETSIZE OPENLDAP_FD_SETSIZE
+#  endif
+#endif
+
+#endif /* _AC_FDSET_H */
diff --git a/include/ac/localize.h b/include/ac/localize.h
new file mode 100644
index 0000000..e665e0c
--- /dev/null
+++ b/include/ac/localize.h
@@ -0,0 +1,44 @@
+/* localize.h (i18n/l10n) */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_LOCALIZE_H
+#define _AC_LOCALIZE_H
+
+#ifdef LDAP_LOCALIZE
+
+#	include <locale.h>
+#	include <libintl.h>
+
+	/* enable i18n/l10n */
+#	define gettext_noop(s)		s
+#	define _(s)					gettext(s)
+#	define N_(s)				gettext_noop(s)
+#	define ldap_pvt_setlocale(c,l)		((void) setlocale(c, l))
+#	define ldap_pvt_textdomain(d)		((void) textdomain(d))
+#	define ldap_pvt_bindtextdomain(p,d)	((void) bindtextdomain(p, d))
+
+#else
+
+	/* disable i18n/l10n */
+#	define _(s)					s
+#	define N_(s)				s
+#	define ldap_pvt_setlocale(c,l)		((void) 0)
+#	define ldap_pvt_textdomain(d)		((void) 0)
+#	define ldap_pvt_bindtextdomain(p,d)	((void) 0)
+
+#endif
+
+#endif /* _AC_LOCALIZE_H */
diff --git a/include/ac/param.h b/include/ac/param.h
new file mode 100644
index 0000000..73fcb18
--- /dev/null
+++ b/include/ac/param.h
@@ -0,0 +1,39 @@
+/* Generic param.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_PARAM_H
+#define _AC_PARAM_H
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+/* MAXPATHLEN should come from <unistd.h> */
+#include <ac/unistd.h>
+
+#ifndef MAXPATHLEN
+#	if defined(PATH_MAX)
+#		define MAXPATHLEN	PATH_MAX
+
+#	elif defined(_MAX_PATH)
+#		define MAXPATHLEN	_MAX_PATH
+
+#	else
+#		define MAXPATHLEN	4096
+#	endif
+#endif
+
+#endif /* _AC_PARAM_H */
diff --git a/include/ac/regex.h b/include/ac/regex.h
new file mode 100644
index 0000000..1bae5d6
--- /dev/null
+++ b/include/ac/regex.h
@@ -0,0 +1,39 @@
+/* Generic Regex */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_REGEX_H_
+#define _AC_REGEX_H_
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifndef HAVE_REGEX_H
+/*	NO POSIX REGEX!!
+ *  You'll need to install a POSIX compatible REGEX library.
+ *  Either Henry Spencer's or GNU regex will do.
+ */
+#error "No POSIX REGEX available."
+
+#elif HAVE_GNUREGEX_H
+	/* system has GNU gnuregex.h */
+#	include <gnuregex.h>
+#else
+	/* have regex.h, assume it's POSIX compliant */
+#	include <regex.h>
+#endif /* regex.h */
+
+#endif /* _AC_REGEX_H_ */
diff --git a/include/ac/setproctitle.h b/include/ac/setproctitle.h
new file mode 100644
index 0000000..cda5e45
--- /dev/null
+++ b/include/ac/setproctitle.h
@@ -0,0 +1,33 @@
+/* Generic setproctitle.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_SETPROCTITLE_H
+#define _AC_SETPROCTITLE_H
+
+#ifdef LDAP_PROCTITLE
+
+#if defined( HAVE_LIBUTIL_H )
+#	include <libutil.h>
+#else
+	/* use lutil version */
+	LDAP_LUTIL_F (void) (setproctitle) LDAP_P((const char *fmt, ...)) \
+		LDAP_GCCATTR((format(printf, 1, 2)));
+	LDAP_LUTIL_V (int) Argc;
+	LDAP_LUTIL_V (char) **Argv;
+#endif
+
+#endif /* LDAP_PROCTITLE */
+#endif /* _AC_SETPROCTITLE_H */
diff --git a/include/ac/signal.h b/include/ac/signal.h
new file mode 100644
index 0000000..34dbc04
--- /dev/null
+++ b/include/ac/signal.h
@@ -0,0 +1,80 @@
+/* Generic signal.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_SIGNAL_H
+#define _AC_SIGNAL_H
+
+#include <signal.h>
+
+#undef SIGNAL
+
+#if defined( HAVE_SIGACTION )
+#define SIGNAL lutil_sigaction
+typedef void (*lutil_sig_t)(int);
+LDAP_LUTIL_F(lutil_sig_t) lutil_sigaction( int sig, lutil_sig_t func );
+#define SIGNAL_REINSTALL(sig,act)	(void)0
+#elif defined( HAVE_SIGSET )
+#define SIGNAL sigset
+#define SIGNAL_REINSTALL sigset
+#else
+#define SIGNAL signal
+#define SIGNAL_REINSTALL signal
+#endif
+
+#if !defined( LDAP_SIGUSR1 ) || !defined( LDAP_SIGUSR2 )
+#undef LDAP_SIGUSR1
+#undef LDAP_SIGUSR2
+
+#	if defined(WINNT) || defined(_WINNT) || defined(_WIN32)
+#		define LDAP_SIGUSR1	SIGILL
+#		define LDAP_SIGUSR2	SIGTERM
+
+#	elif !defined(HAVE_LINUX_THREADS)
+#		define LDAP_SIGUSR1	SIGUSR1
+#		define LDAP_SIGUSR2	SIGUSR2
+
+#	else
+		/*
+		 * Some versions of LinuxThreads unfortunately uses the only
+		 * two signals reserved for user applications.  This forces
+		 * OpenLDAP to use other signals reserved for other uses.
+		 */
+
+#		if defined( SIGSTKFLT )
+#			define LDAP_SIGUSR1	SIGSTKFLT
+#		elif defined ( SIGSYS )
+#			define LDAP_SIGUSR1	SIGSYS
+#		endif
+
+#		if defined( SIGUNUSED )
+#			define LDAP_SIGUSR2	SIGUNUSED
+#		elif defined ( SIGINFO )
+#			define LDAP_SIGUSR2	SIGINFO
+#		elif defined ( SIGEMT )
+#			define LDAP_SIGUSR2	SIGEMT
+#		endif
+#	endif
+#endif
+
+#ifndef LDAP_SIGCHLD
+#ifdef SIGCHLD
+#define LDAP_SIGCHLD SIGCHLD
+#elif SIGCLD
+#define LDAP_SIGCHLD SIGCLD
+#endif
+#endif
+
+#endif /* _AC_SIGNAL_H */
diff --git a/include/ac/socket.h b/include/ac/socket.h
new file mode 100644
index 0000000..7b9252d
--- /dev/null
+++ b/include/ac/socket.h
@@ -0,0 +1,254 @@
+/* Generic socket.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_SOCKET_H_
+#define _AC_SOCKET_H_
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#elif defined(HAVE_SYS_POLL_H)
+#include <sys/poll.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+#include <netinet/in.h>
+
+#ifdef HAVE_NETINET_TCP_H
+#include <netinet/tcp.h>
+#endif
+
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+
+#ifdef HAVE_ARPA_NAMESER_H
+#include <arpa/nameser.h>
+#endif
+
+#include <netdb.h>
+
+#ifdef HAVE_RESOLV_H
+#include <resolv.h>
+#endif
+
+#endif /* HAVE_SYS_SOCKET_H */
+
+#ifdef HAVE_WINSOCK2
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#elif HAVE_WINSOCK
+#include <winsock.h>
+#endif
+
+#ifdef HAVE_PCNFS
+#include <tklib.h>
+#endif /* HAVE_PCNFS */
+
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK	(0x7f000001UL)
+#endif
+
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN  64
+#endif
+
+#undef	sock_errno
+#undef	sock_errstr
+#define sock_errno()	errno
+#define sock_errstr(e)	STRERROR(e)
+#define sock_errset(e)	((void) (errno = (e)))
+
+#ifdef HAVE_WINSOCK
+#	define tcp_read( s, buf, len )	recv( s, buf, len, 0 )
+#	define tcp_write( s, buf, len )	send( s, buf, len, 0 )
+#	define ioctl( s, c, a )		ioctlsocket( (s), (c), (a) )
+#	define ioctl_t				u_long
+#	define AC_SOCKET_INVALID	((unsigned int) -1)
+
+#	ifdef SD_BOTH
+#		define tcp_close( s )	(shutdown( s, SD_BOTH ), closesocket( s ))
+#	else
+#		define tcp_close( s )		closesocket( s )
+#	endif
+
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#define EINPROGRESS WSAEINPROGRESS
+#define ETIMEDOUT	WSAETIMEDOUT
+
+#undef	sock_errno
+#undef	sock_errstr
+#undef	sock_errset
+#define	sock_errno()	WSAGetLastError()
+#define	sock_errstr(e)	ber_pvt_wsa_err2string(e)
+#define	sock_errset(e)	WSASetLastError(e)
+
+LBER_F( char * ) ber_pvt_wsa_err2string LDAP_P((int));
+
+#elif MACOS
+#	define tcp_close( s )		tcpclose( s )
+#	define tcp_read( s, buf, len )	tcpread( s, buf, len )
+#	define tcp_write( s, buf, len )	tcpwrite( s, buf, len )
+
+#elif DOS
+#	ifdef PCNFS
+#		define tcp_close( s )	close( s )
+#		define tcp_read( s, buf, len )	recv( s, buf, len, 0 )
+#		define tcp_write( s, buf, len )	send( s, buf, len, 0 )
+#	endif /* PCNFS */
+#	ifdef NCSA
+#		define tcp_close( s )	do { netclose( s ); netshut() } while(0)
+#		define tcp_read( s, buf, len )	nread( s, buf, len )
+#		define tcp_write( s, buf, len )	netwrite( s, buf, len )
+#	endif /* NCSA */
+
+#elif defined(HAVE_CLOSESOCKET)
+#	define tcp_close( s )		closesocket( s )
+
+#	ifdef __BEOS__
+#		define tcp_read( s, buf, len )	recv( s, buf, len, 0 )
+#		define tcp_write( s, buf, len )	send( s, buf, len, 0 )
+#	endif
+
+#else
+#	define tcp_read( s, buf, len)	read( s, buf, len )
+#	define tcp_write( s, buf, len)	write( s, buf, len )
+
+#	ifdef SHUT_RDWR
+#		define tcp_close( s )	(shutdown( s, SHUT_RDWR ), close( s ))
+#	else
+#		define tcp_close( s )	close( s )
+#	endif
+
+#ifdef HAVE_PIPE
+/*
+ * Only use pipe() on systems where file and socket descriptors
+ * are interchangable
+ */
+#	define USE_PIPE HAVE_PIPE
+#endif
+
+#endif /* MACOS */
+
+#ifndef ioctl_t
+#	define ioctl_t				int
+#endif
+
+#ifndef AC_SOCKET_INVALID
+#	define AC_SOCKET_INVALID	(-1)
+#endif
+#ifndef AC_SOCKET_ERROR
+#	define AC_SOCKET_ERROR		(-1)
+#endif
+
+#if !defined( HAVE_INET_ATON ) && !defined( inet_aton )
+#	define inet_aton ldap_pvt_inet_aton
+struct in_addr;
+LDAP_F (int) ldap_pvt_inet_aton LDAP_P(( const char *, struct in_addr * ));
+#endif
+
+#if	defined(__WIN32) && defined(_ALPHA)
+/* NT on Alpha is hosed. */
+#	define AC_HTONL( l ) \
+        ((((l)&0xffU)<<24) + (((l)&0xff00U)<<8) + \
+         (((l)&0xff0000U)>>8) + (((l)&0xff000000U)>>24))
+#	define AC_NTOHL(l) AC_HTONL(l)
+
+#else
+#	define AC_HTONL( l ) htonl( l )
+#	define AC_NTOHL( l ) ntohl( l )
+#endif
+
+/* htons()/ntohs() may be broken much like htonl()/ntohl() */
+#define AC_HTONS( s ) htons( s )
+#define AC_NTOHS( s ) ntohs( s )
+
+#ifdef LDAP_PF_LOCAL
+#  if !defined( AF_LOCAL ) && defined( AF_UNIX )
+#    define AF_LOCAL	AF_UNIX
+#  endif
+#  if !defined( PF_LOCAL ) && defined( PF_UNIX )
+#    define PF_LOCAL	PF_UNIX
+#  endif
+#endif
+
+#ifndef INET_ADDRSTRLEN
+#	define INET_ADDRSTRLEN 16
+#endif
+#ifndef INET6_ADDRSTRLEN
+#	define INET6_ADDRSTRLEN 46
+#endif
+
+#if defined( HAVE_GETADDRINFO ) || defined( HAVE_GETNAMEINFO )
+#	ifdef HAVE_GAI_STRERROR
+#		define AC_GAI_STRERROR(x)	(gai_strerror((x)))
+#	else
+#		define AC_GAI_STRERROR(x)	(ldap_pvt_gai_strerror((x)))
+		LDAP_F (char *) ldap_pvt_gai_strerror( int );
+#	endif
+#endif
+
+#if defined(LDAP_PF_LOCAL) && \
+	!defined(HAVE_GETPEEREID) && \
+	!defined(HAVE_GETPEERUCRED) && \
+	!defined(SO_PEERCRED) && !defined(LOCAL_PEERCRED) && \
+	defined(HAVE_SENDMSG) && (defined(HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTSLEN) || \
+	defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL))
+#	define LDAP_PF_LOCAL_SENDMSG 1
+#endif
+
+#ifdef HAVE_GETPEEREID
+#define	LUTIL_GETPEEREID( s, uid, gid, bv )	getpeereid( s, uid, gid )
+#elif defined(LDAP_PF_LOCAL_SENDMSG)
+struct berval;
+LDAP_LUTIL_F( int ) lutil_getpeereid( int s, uid_t *, gid_t *, struct berval *bv );
+#define	LUTIL_GETPEEREID( s, uid, gid, bv )	lutil_getpeereid( s, uid, gid, bv )
+#else
+LDAP_LUTIL_F( int ) lutil_getpeereid( int s, uid_t *, gid_t * );
+#define	LUTIL_GETPEEREID( s, uid, gid, bv )	lutil_getpeereid( s, uid, gid )
+#endif
+
+/* DNS RFC defines max host name as 255. New systems seem to use 1024 */
+#ifndef NI_MAXHOST
+#define	NI_MAXHOST	256
+#endif
+
+#ifdef HAVE_POLL
+# ifndef INFTIM
+#  define INFTIM (-1)
+# endif
+#undef POLL_OTHER
+#define POLL_OTHER   (POLLERR|POLLHUP)
+#undef POLL_READ
+#define POLL_READ    (POLLIN|POLLPRI|POLL_OTHER)
+#undef POLL_WRITE              
+#define POLL_WRITE   (POLLOUT|POLL_OTHER)
+#endif
+
+#endif /* _AC_SOCKET_H_ */
diff --git a/include/ac/stdarg.h b/include/ac/stdarg.h
new file mode 100644
index 0000000..3cf9f4e
--- /dev/null
+++ b/include/ac/stdarg.h
@@ -0,0 +1,28 @@
+/* Generic stdarg.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_STDARG_H
+#define _AC_STDARG_H 1
+
+/* require STDC variable argument support */
+
+#include <stdarg.h>
+
+#ifndef HAVE_STDARG
+#	define HAVE_STDARG 1
+#endif
+
+#endif /* _AC_STDARG_H */
diff --git a/include/ac/stdlib.h b/include/ac/stdlib.h
new file mode 100644
index 0000000..d016aae
--- /dev/null
+++ b/include/ac/stdlib.h
@@ -0,0 +1,48 @@
+/* Generic stdlib.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_STDLIB_H
+#define _AC_STDLIB_H
+
+#if defined( HAVE_CSRIMALLOC )
+#include <stdio.h>
+#define MALLOC_TRACE
+#include <libmalloc.h>
+#endif
+
+#include <stdlib.h>
+
+/* Ignore malloc.h if we have STDC_HEADERS */
+#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
+#	include <malloc.h>
+#endif
+
+#ifndef EXIT_SUCCESS
+#	define EXIT_SUCCESS 0
+#	define EXIT_FAILURE 1
+#endif
+
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#if defined(LINE_MAX) 
+#	define AC_LINE_MAX LINE_MAX
+#else
+#	define AC_LINE_MAX 2048 /* POSIX MIN */
+#endif
+
+#endif /* _AC_STDLIB_H */
diff --git a/include/ac/string.h b/include/ac/string.h
new file mode 100644
index 0000000..36bf626
--- /dev/null
+++ b/include/ac/string.h
@@ -0,0 +1,118 @@
+/* Generic string.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_STRING_H
+#define _AC_STRING_H
+
+#ifdef STDC_HEADERS
+#	include <string.h>
+
+#else
+#	ifdef HAVE_STRING_H
+#		include <string.h>
+#	endif
+#	if defined(HAVE_STRINGS_H) && (!defined(HAVE_STRING_H) || defined(BOTH_STRINGS_H))
+#		include <strings.h>
+#	endif
+
+#	ifdef HAVE_MEMORY_H
+#		include <memory.h>
+#	endif
+
+#	ifndef HAVE_STRRCHR
+#		undef strchr
+#		define strchr index
+#		undef strrchr
+#		define strrchr rindex
+#	endif
+
+#	ifndef HAVE_MEMCPY
+#		undef memcpy
+#		define memcpy(d, s, n)		((void) bcopy ((s), (d), (n)))
+#		undef memmove
+#		define memmove(d, s, n)		((void) bcopy ((s), (d), (n)))
+#	endif
+#endif
+
+/* use ldap_pvt_strtok instead of strtok or strtok_r! */
+LDAP_F(char *) ldap_pvt_strtok LDAP_P(( char *str,
+	const char *delim, char **pos ));
+
+#ifndef HAVE_STRDUP
+	/* strdup() is missing, declare our own version */
+#	undef strdup
+#	define strdup(s) ber_strdup(s)
+#elif !defined(_WIN32)
+	/* some systems fail to declare strdup */
+	/* Windows does not require this declaration */
+	LDAP_LIBC_F(char *) (strdup)();
+#endif
+
+/*
+ * some systems fail to declare strcasecmp() and strncasecmp()
+ * we need them declared so we can obtain pointers to them
+ */
+
+/* we don't want these declared for Windows or Mingw */
+#ifndef _WIN32
+int (strcasecmp)();
+int (strncasecmp)();
+#endif
+
+#ifndef SAFEMEMCPY
+#	if defined( HAVE_MEMMOVE )
+#		define SAFEMEMCPY( d, s, n ) 	memmove((d), (s), (n))
+#	elif defined( HAVE_BCOPY )
+#		define SAFEMEMCPY( d, s, n ) 	bcopy((s), (d), (n))
+#	else
+		/* nothing left but memcpy() */
+#		define SAFEMEMCPY( d, s, n )	memcpy((d), (s), (n))
+#	endif
+#endif
+
+#define AC_MEMCPY( d, s, n ) (SAFEMEMCPY((d),(s),(n)))
+#define AC_FMEMCPY( d, s, n ) do { \
+		if((n) == 1) *((char*)(d)) = *((char*)(s)); \
+		else AC_MEMCPY( (d), (s), (n) ); \
+	} while(0)
+
+#ifdef NEED_MEMCMP_REPLACEMENT
+	int (lutil_memcmp)(const void *b1, const void *b2, size_t len);
+#define memcmp lutil_memcmp
+#endif
+
+void *(lutil_memrchr)(const void *b, int c, size_t n);
+/* GNU extension (glibc >= 2.1.91), only declared when defined(_GNU_SOURCE) */
+#if defined(HAVE_MEMRCHR) && defined(_GNU_SOURCE)
+#define lutil_memrchr(b, c, n) memrchr(b, c, n)
+#endif /* ! HAVE_MEMRCHR */
+
+#define STRLENOF(s)	(sizeof(s)-1)
+
+#if defined( HAVE_NONPOSIX_STRERROR_R )
+#	define AC_STRERROR_R(e,b,l)		(strerror_r((e), (b), (l)))
+#elif defined( HAVE_STRERROR_R )
+#	define AC_STRERROR_R(e,b,l)		(strerror_r((e), (b), (l)) == 0 ? (b) : "Unknown error")
+#elif defined( HAVE_SYS_ERRLIST )
+#	define AC_STRERROR_R(e,b,l)		((e) > -1 && (e) < sys_nerr \
+							? sys_errlist[(e)] : "Unknown error" )
+#elif defined( HAVE_STRERROR )
+#	define AC_STRERROR_R(e,b,l)		(strerror(e))	/* NOTE: may be NULL */
+#else
+#	define AC_STRERROR_R(e,b,l)		("Unknown error")
+#endif
+
+#endif /* _AC_STRING_H */
diff --git a/include/ac/sysexits.h b/include/ac/sysexits.h
new file mode 100644
index 0000000..53de13b
--- /dev/null
+++ b/include/ac/sysexits.h
@@ -0,0 +1,26 @@
+/* Generic sysexits */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_SYSEXITS_H_
+#define _AC_SYSEXITS_H_
+
+#ifdef HAVE_SYSEXITS_H
+#	include <sysexits.h>
+#else
+#	include <sysexits-compat.h>
+#endif
+
+#endif /* _AC_SYSEXITS_H_ */
diff --git a/include/ac/syslog.h b/include/ac/syslog.h
new file mode 100644
index 0000000..7cfa3b8
--- /dev/null
+++ b/include/ac/syslog.h
@@ -0,0 +1,38 @@
+/* Generic syslog.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_SYSLOG_H_
+#define _AC_SYSLOG_H_
+
+#if defined( HAVE_SYSLOG_H )
+#include <syslog.h>
+#elif defined ( HAVE_SYS_SYSLOG_H )
+#include <sys/syslog.h>
+#endif
+
+#if defined( LOG_NDELAY ) && defined( LOG_NOWAIT )
+#	define OPENLOG_OPTIONS ( LOG_PID | LOG_NDELAY | LOG_NOWAIT )
+#elif defined( LOG_NDELAY )
+#	define OPENLOG_OPTIONS ( LOG_PID | LOG_NDELAY )
+#elif defined( LOG_NOWAIT )
+#	define OPENLOG_OPTIONS ( LOG_PID | LOG_NOWAIT )
+#elif defined( LOG_PID )
+#	define OPENLOG_OPTIONS ( LOG_PID )
+#else
+#   define OPENLOG_OPTIONS ( 0 )
+#endif
+
+#endif /* _AC_SYSLOG_H_ */
diff --git a/include/ac/termios.h b/include/ac/termios.h
new file mode 100644
index 0000000..4bdcdd9
--- /dev/null
+++ b/include/ac/termios.h
@@ -0,0 +1,50 @@
+/* Generic termios.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_TERMIOS_H
+#define _AC_TERMIOS_H
+
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+
+#ifdef GCWINSZ_IN_SYS_IOCTL
+#include <sys/ioctl.h>
+#endif
+
+#define TERMIO_TYPE	struct termios
+#define TERMFLAG_TYPE	tcflag_t
+#define GETATTR( fd, tiop )	tcgetattr((fd), (tiop))
+#define SETATTR( fd, tiop )	tcsetattr((fd), TCSANOW /* 0 */, (tiop))
+#define GETFLAGS( tio )		((tio).c_lflag)
+#define SETFLAGS( tio, flags )	((tio).c_lflag = (flags))
+
+#elif defined( HAVE_SGTTY_H )
+#include <sgtty.h>
+
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#define TERMIO_TYPE	struct sgttyb
+#define TERMFLAG_TYPE	int
+#define GETATTR( fd, tiop )	ioctl((fd), TIOCGETP, (caddr_t)(tiop))
+#define SETATTR( fd, tiop )	ioctl((fd), TIOCSETP, (caddr_t)(tiop))
+#define GETFLAGS( tio )     ((tio).sg_flags)
+#define SETFLAGS( tio, flags )  ((tio).sg_flags = (flags))
+
+#endif /* HAVE_SGTTY_H */
+
+#endif /* _AC_TERMIOS_H */
diff --git a/include/ac/time.h b/include/ac/time.h
new file mode 100644
index 0000000..fe618e1
--- /dev/null
+++ b/include/ac/time.h
@@ -0,0 +1,32 @@
+/* Generic time.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_TIME_H
+#define _AC_TIME_H
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#elif defined(HAVE_SYS_TIME_H)
+# include <sys/time.h>
+# ifdef HAVE_SYS_TIMEB_H
+#  include <sys/timeb.h>
+# endif
+#else
+# include <time.h>
+#endif
+
+#endif /* _AC_TIME_H */
diff --git a/include/ac/unistd.h b/include/ac/unistd.h
new file mode 100644
index 0000000..cb5fe65
--- /dev/null
+++ b/include/ac/unistd.h
@@ -0,0 +1,72 @@
+/* Generic unistd.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_UNISTD_H
+#define _AC_UNISTD_H
+
+#ifdef HAVE_SYS_TYPES_H
+#	include <sys/types.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#	include <unistd.h>
+#endif
+
+#ifdef HAVE_PROCESS_H
+#	include <process.h>
+#endif
+
+/* note: callers of crypt(3) should include <ac/crypt.h> */
+
+#if defined(HAVE_GETPASSPHRASE)
+LDAP_LIBC_F(char*)(getpassphrase)();
+
+#else
+#define getpassphrase(p) lutil_getpass(p)
+LDAP_LUTIL_F(char*)(lutil_getpass) LDAP_P((const char *getpass));
+#endif
+
+/* getopt() defines may be in separate include file */
+#ifdef HAVE_GETOPT_H
+#	include <getopt.h>
+
+#elif !defined(HAVE_GETOPT)
+	/* no getopt, assume we need getopt-compat.h */
+#	include <getopt-compat.h>
+
+#else
+	/* assume we need to declare these externs */
+	LDAP_LIBC_V (char *) optarg;
+	LDAP_LIBC_V (int) optind, opterr, optopt;
+#endif
+
+/* use lutil file locking */
+#define ldap_lockf(x)	lutil_lockf(x)
+#define ldap_unlockf(x)	lutil_unlockf(x)
+#include <lutil_lockf.h>
+
+/*
+ * Windows: although sleep() will be resolved by both MSVC and Mingw GCC
+ * linkers, the function is not declared in header files. This is
+ * because Windows' version of the function is called _sleep(), and it
+ * is declared in stdlib.h
+ */
+
+#ifdef _WIN32
+#define sleep _sleep
+#endif
+
+#endif /* _AC_UNISTD_H */
diff --git a/include/ac/wait.h b/include/ac/wait.h
new file mode 100644
index 0000000..fd265d1
--- /dev/null
+++ b/include/ac/wait.h
@@ -0,0 +1,56 @@
+/* Generic wait.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_WAIT_H
+#define _AC_WAIT_H
+
+#include <sys/types.h>
+
+#ifdef HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+#define LDAP_HI(s)	(((s) >> 8) & 0377)
+#define LDAP_LO(s)	((s) & 0377)
+
+/* These should work on non-POSIX UNIX platforms,
+	all bets on off on non-POSIX non-UNIX platforms... */
+#ifndef WIFEXITED
+# define WIFEXITED(s)	(LDAP_LO(s) == 0)
+#endif
+#ifndef WEXITSTATUS
+# define WEXITSTATUS(s) LDAP_HI(s)
+#endif
+#ifndef WIFSIGNALED
+# define WIFSIGNALED(s) (LDAP_LO(s) > 0 && LDAP_HI(s) == 0)
+#endif
+#ifndef WTERMSIG
+# define WTERMSIG(s)	(LDAP_LO(s) & 0177)
+#endif
+#ifndef WIFSTOPPED
+# define WIFSTOPPED(s)	(LDAP_LO(s) == 0177 && LDAP_HI(s) != 0)
+#endif
+#ifndef WSTOPSIG
+# define WSTOPSIG(s)	LDAP_HI(s)
+#endif
+
+#ifdef WCONTINUED
+# define WAIT_FLAGS ( WNOHANG | WUNTRACED | WCONTINUED )
+#else
+# define WAIT_FLAGS ( WNOHANG | WUNTRACED )
+#endif
+
+#endif /* _AC_WAIT_H */