Imported from /home/lorry/working-area/delta_ntp/ntp-dev-4.2.7p482.tar.gz.ntp-dev-4.2.7p482

7 files changed, 970 insertions, 0 deletions

diff --git a/sntp/libopts/compat/_Noreturn.h b/sntp/libopts/compat/_Noreturn.h
new file mode 100644
index 0000000..c44ad89
--- /dev/null
+++ b/sntp/libopts/compat/_Noreturn.h
@@ -0,0 +1,10 @@
+#if !defined _Noreturn && __STDC_VERSION__ < 201112
+# if (3 <= __GNUC__ || (__GNUC__ == 2 && 8 <= __GNUC_MINOR__) \
+      || 0x5110 <= __SUNPRO_C)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= _MSC_VER
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
diff --git a/sntp/libopts/compat/compat.h b/sntp/libopts/compat/compat.h
new file mode 100644
index 0000000..69206a3
--- /dev/null
+++ b/sntp/libopts/compat/compat.h
@@ -0,0 +1,383 @@
+/*  -*- Mode: C -*- 
+ *
+ *  compat.h is free software.
+ *  This file is part of AutoGen and AutoOpts.
+ *
+ *  AutoGen Copyright (C) 1992-2014 by Bruce Korb - all rights reserved
+ *
+ *  AutoOpts is available under any one of two licenses.  The license
+ *  in use must be one of these two and the choice is under the control
+ *  of the user of the license.
+ *
+ *   The GNU Lesser General Public License, version 3 or later
+ *      See the files "COPYING.lgplv3" and "COPYING.gplv3"
+ *
+ *   The Modified Berkeley Software Distribution License
+ *      See the file "COPYING.mbsd"
+ *
+ *  These files have the following sha256 sums:
+ *
+ *  8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95  COPYING.gplv3
+ *  4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b  COPYING.lgplv3
+ *  13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239  COPYING.mbsd
+ */
+
+/**
+ * \file compat.h
+ *  fake the preprocessor into handlng stuff portability
+ */
+#ifndef COMPAT_H_GUARD
+#define COMPAT_H_GUARD 1
+
+#if defined(HAVE_CONFIG_H)
+#  include <config.h>
+
+#elif defined(_WIN32) && !defined(__CYGWIN__)
+#  include "windows-config.h"
+
+#else
+#  error "compat.h" requires "config.h"
+   choke me.
+#endif
+
+
+#ifndef HAVE_STRSIGNAL
+# ifndef HAVE_RAW_DECL_STRSIGNAL
+   char * strsignal(int signo);
+# endif
+#endif
+
+#define  _GNU_SOURCE    1 /* for strsignal in GNU's libc */
+#define  __USE_GNU      1 /* exact same thing as above   */
+#define  __EXTENSIONS__ 1 /* and another way to call for it */
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ *  SYSTEM HEADERS:
+ */
+#include <sys/types.h>
+#ifdef HAVE_SYS_MMAN_H
+#  include <sys/mman.h>
+#endif
+#include <sys/param.h>
+#if HAVE_SYS_PROCSET_H
+#  include <sys/procset.h>
+#endif
+#include <sys/stat.h>
+#ifdef HAVE_SYS_WAIT_H
+#  include <sys/wait.h>
+#endif
+
+#if defined( HAVE_SOLARIS_SYSINFO )
+#  include <sys/systeminfo.h>
+#elif defined( HAVE_UNAME_SYSCALL )
+#  include <sys/utsname.h>
+#endif
+
+#ifdef DAEMON_ENABLED
+#  if HAVE_SYS_STROPTS_H
+#  include <sys/stropts.h>
+#  endif
+
+#  if HAVE_SYS_SOCKET_H
+#  include <sys/socket.h>
+#  endif
+
+#  if ! defined(HAVE_SYS_POLL_H) && ! defined(HAVE_SYS_SELECT_H)
+#    error This system cannot support daemon processing
+     Choke Me.
+#  endif
+
+#  if HAVE_SYS_POLL_H
+#  include <sys/poll.h>
+#  endif
+
+#  if HAVE_SYS_SELECT_H
+#  include <sys/select.h>
+#  endif
+
+#  if HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#  endif
+
+#  if HAVE_SYS_UN_H
+#  include <sys/un.h>
+#  endif
+#endif
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ *  USER HEADERS:
+ */
+#include <stdio.h>
+#include <assert.h>
+#include <ctype.h>
+
+/*
+ *  Directory opening stuff:
+ */
+# if defined (_POSIX_SOURCE)
+/* Posix does not require that the d_ino field be present, and some
+   systems do not provide it. */
+#    define REAL_DIR_ENTRY(dp) 1
+# else /* !_POSIX_SOURCE */
+#    define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
+# endif /* !_POSIX_SOURCE */
+
+# if defined (HAVE_DIRENT_H)
+#   include <dirent.h>
+#   define D_NAMLEN(dirent) strlen((dirent)->d_name)
+# else /* !HAVE_DIRENT_H */
+#   define dirent direct
+#   define D_NAMLEN(dirent) (dirent)->d_namlen
+#   if defined (HAVE_SYS_NDIR_H)
+#     include <sys/ndir.h>
+#   endif /* HAVE_SYS_NDIR_H */
+#   if defined (HAVE_SYS_DIR_H)
+#     include <sys/dir.h>
+#   endif /* HAVE_SYS_DIR_H */
+#   if defined (HAVE_NDIR_H)
+#     include <ndir.h>
+#   endif /* HAVE_NDIR_H */
+# endif /* !HAVE_DIRENT_H */
+
+#include <errno.h>
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+#ifndef O_NONBLOCK
+# define O_NONBLOCK FNDELAY
+#endif
+
+#if defined(HAVE_LIBGEN) && defined(HAVE_LIBGEN_H)
+#  include <libgen.h>
+#endif
+
+#if defined(HAVE_LIMITS_H)  /* this is also in options.h */
+#  include <limits.h>
+#elif defined(HAVE_SYS_LIMITS_H)
+#  include <sys/limits.h>
+#endif /* HAVE_LIMITS/SYS_LIMITS_H */
+
+#include <memory.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#if defined(HAVE_STDINT_H)
+#  include <stdint.h>
+
+#elif defined(HAVE_INTTYPES_H)
+#  include <inttypes.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#ifdef HAVE_UTIME_H
+#  include <utime.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+
+#ifdef HAVE_STDBOOL_H
+#  include <stdbool.h>
+#else
+   typedef enum { false = 0, true = 1 } _Bool;
+#  define bool _Bool
+
+   /* The other macros must be usable in preprocessor directives.  */
+#  define false 0
+#  define true 1
+#endif
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ *
+ *  FIXUPS and CONVIENCE STUFF:
+ */
+#ifdef __cplusplus
+#   define EXTERN extern "C"
+#else
+#   define EXTERN extern
+#endif
+
+/* some systems #def errno! and others do not declare it!! */
+#ifndef errno
+   extern int errno;
+#endif
+
+/* Some machines forget this! */
+
+# ifndef EXIT_FAILURE
+#   define EXIT_SUCCESS 0
+#   define EXIT_FAILURE 1
+# endif
+
+#ifndef NUL
+#  define NUL '\0'
+#endif
+
+#ifndef NULL
+#  define NULL 0
+#endif
+
+#if !defined (MAXPATHLEN) && defined (HAVE_SYS_PARAM_H)
+#  include <sys/param.h>
+#endif /* !MAXPATHLEN && HAVE_SYS_PARAM_H */
+
+#if !defined (MAXPATHLEN) && defined (PATH_MAX)
+#  define MAXPATHLEN PATH_MAX
+#endif /* !MAXPATHLEN && PATH_MAX */
+
+#if !defined (MAXPATHLEN) && defined(_MAX_PATH)
+#  define PATH_MAX _MAX_PATH
+#  define MAXPATHLEN _MAX_PATH
+#endif
+
+#if !defined (MAXPATHLEN)
+#  define MAXPATHLEN 4096
+#endif /* MAXPATHLEN */
+
+#define AG_PATH_MAX  ((size_t)MAXPATHLEN)
+
+#ifndef LONG_MAX
+#  define LONG_MAX      ~(1L << (8*sizeof(long) -1))
+#  define INT_MAX       ~(1 << (8*sizeof(int) -1))
+#endif
+
+#ifndef ULONG_MAX
+#  define ULONG_MAX     ~(OUL)
+#  define UINT_MAX      ~(OU)
+#endif
+
+#ifndef SHORT_MAX
+#  define SHORT_MAX     ~(1 << (8*sizeof(short) - 1))
+#else
+#  define USHORT_MAX    ~(OUS)
+#endif
+
+#ifndef HAVE_INT8_T
+  typedef signed char           int8_t;
+# define  HAVE_INT8_T           1
+#endif
+#ifndef HAVE_UINT8_T
+  typedef unsigned char         uint8_t;
+# define  HAVE_UINT8_T          1
+#endif
+#ifndef HAVE_INT16_T
+  typedef signed short          int16_t;
+# define  HAVE_INT16_T          1
+#endif
+#ifndef HAVE_UINT16_T
+  typedef unsigned short        uint16_t;
+# define  HAVE_UINT16_T         1
+#endif
+
+#ifndef HAVE_INT32_T
+# if SIZEOF_INT ==              4
+    typedef signed int          int32_t;
+# elif SIZEOF_LONG ==           4
+    typedef signed long         int32_t;
+# endif
+# define  HAVE_INT32_T          1
+#endif
+
+#ifndef HAVE_UINT32_T
+# if SIZEOF_INT ==              4
+    typedef unsigned int        uint32_t;
+# elif SIZEOF_LONG ==           4
+    typedef unsigned long       uint32_t;
+# else
+#   error Cannot create a uint32_t type.
+    Choke Me.
+# endif
+# define  HAVE_UINT32_T         1
+#endif
+
+#ifndef HAVE_INTPTR_T
+# if SIZEOF_CHARP == SIZEOF_LONG
+    typedef signed long         intptr_t;
+# else
+    typedef signed int          intptr_t;
+# endif
+# define  HAVE_INTPTR_T         1
+#endif
+
+#ifndef HAVE_UINTPTR_T
+# if SIZEOF_CHARP == SIZEOF_LONG
+    typedef unsigned long       intptr_t;
+# else
+    typedef unsigned int        intptr_t;
+# endif
+# define  HAVE_INTPTR_T         1
+#endif
+
+#ifndef HAVE_UINT_T
+  typedef unsigned int          uint_t;
+# define  HAVE_UINT_T           1
+#endif
+
+#ifndef HAVE_SIZE_T
+  typedef unsigned int          size_t;
+# define  HAVE_SIZE_T           1
+#endif
+#ifndef HAVE_WINT_T
+  typedef unsigned int          wint_t;
+# define  HAVE_WINT_T           1
+#endif
+#ifndef HAVE_PID_T
+  typedef signed int            pid_t;
+# define  HAVE_PID_T            1
+#endif
+
+/* redefine these for BSD style string libraries */
+#ifndef HAVE_STRCHR
+#  define strchr            index
+#  define strrchr           rindex
+#endif
+
+#ifdef USE_FOPEN_BINARY
+#  ifndef FOPEN_BINARY_FLAG
+#    define FOPEN_BINARY_FLAG   "b"
+#  endif
+#  ifndef FOPEN_TEXT_FLAG
+#    define FOPEN_TEXT_FLAG     "t"
+#  endif
+#else
+#  ifndef FOPEN_BINARY_FLAG
+#    define FOPEN_BINARY_FLAG
+#  endif
+#  ifndef FOPEN_TEXT_FLAG
+#    define FOPEN_TEXT_FLAG
+#  endif
+#endif
+
+#ifndef STR
+#  define _STR(s) #s
+#  define STR(s)  _STR(s)
+#endif
+
+/* ##### Pointer sized word ##### */
+
+/* FIXME:  the MAX stuff in here is broken! */
+#if SIZEOF_CHARP > SIZEOF_INT
+   typedef long t_word;
+   #define WORD_MAX  LONG_MAX
+   #define WORD_MIN  LONG_MIN
+#else /* SIZEOF_CHARP <= SIZEOF_INT */
+   typedef int t_word;
+   #define WORD_MAX  INT_MAX
+   #define WORD_MIN  INT_MIN
+#endif
+
+#endif /* COMPAT_H_GUARD */
+
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of compat/compat.h */
diff --git a/sntp/libopts/compat/pathfind.c b/sntp/libopts/compat/pathfind.c
new file mode 100644
index 0000000..6554533
--- /dev/null
+++ b/sntp/libopts/compat/pathfind.c
@@ -0,0 +1,283 @@
+/*  -*- Mode: C -*-  */
+
+/* pathfind.c --- find a FILE  MODE along PATH */
+
+/* Author: Gary V Vaughan <gvaughan@oranda.demon.co.uk> */
+
+/* Code: */
+
+static char *
+pathfind( char const * path,
+          char const * fname,
+          char const * mode );
+
+#include "compat.h"
+#ifndef HAVE_PATHFIND
+#if defined(__windows__) && !defined(__CYGWIN__)
+static char *
+pathfind( char const * path,
+          char const * fname,
+          char const * mode )
+{
+    return strdup(fname);
+}
+#else
+
+static char* make_absolute( char const *string, char const *dot_path );
+static char* canonicalize_pathname( char *path );
+static char* extract_colon_unit( char* dir, char const *string, int *p_index );
+
+/**
+ * local implementation of pathfind.
+ * @param[in] path  colon separated list of directories
+ * @param[in] fname the name we are hunting for
+ * @param[in] mode  the required file mode
+ * @returns an allocated string with the full path, or NULL
+ */
+static char *
+pathfind( char const * path,
+          char const * fname,
+          char const * mode )
+{
+    int    p_index   = 0;
+    int    mode_bits = 0;
+    char * res_path  = NULL;
+    char   zPath[ AG_PATH_MAX + 1 ];
+
+    if (strchr( mode, 'r' )) mode_bits |= R_OK;
+    if (strchr( mode, 'w' )) mode_bits |= W_OK;
+    if (strchr( mode, 'x' )) mode_bits |= X_OK;
+
+    /*
+     *  FOR each non-null entry in the colon-separated path, DO ...
+     */
+    for (;;) {
+        DIR*  dirP;
+        char* colon_unit = extract_colon_unit( zPath, path, &p_index );
+
+        if (colon_unit == NULL)
+            break;
+
+        dirP = opendir( colon_unit );
+
+        /*
+         *  IF the directory is inaccessable, THEN next directory
+         */
+        if (dirP == NULL)
+            continue;
+
+        for (;;) {
+            struct dirent *entP = readdir( dirP );
+
+            if (entP == (struct dirent*)NULL)
+                break;
+
+            /*
+             *  IF the file name matches the one we are looking for, ...
+             */
+            if (strcmp(entP->d_name, fname) == 0) {
+                char * abs_name = make_absolute(fname, colon_unit);
+
+                /*
+                 *  Make sure we can access it in the way we want
+                 */
+                if (access(abs_name, mode_bits) >= 0) {
+                    /*
+                     *  We can, so normalize the name and return it below
+                     */
+                    res_path = canonicalize_pathname(abs_name);
+                }
+
+                free(abs_name);
+                break;
+            }
+        }
+
+        closedir( dirP );
+
+        if (res_path != NULL)
+            break;
+    }
+
+    return res_path;
+}
+
+/*
+ * Turn STRING  (a pathname) into an  absolute  pathname, assuming  that
+ * DOT_PATH contains the symbolic location of  `.'.  This always returns
+ * a new string, even if STRING was an absolute pathname to begin with.
+ */
+static char*
+make_absolute( char const *string, char const *dot_path )
+{
+    char *result;
+    int result_len;
+
+    if (!dot_path || *string == '/') {
+        result = strdup( string );
+    } else {
+        if (dot_path && dot_path[0]) {
+            result = malloc( 2 + strlen( dot_path ) + strlen( string ) );
+            strcpy( result, dot_path );
+            result_len = (int)strlen(result);
+            if (result[result_len - 1] != '/') {
+                result[result_len++] = '/';
+                result[result_len] = '\0';
+            }
+        } else {
+            result = malloc( 3 + strlen( string ) );
+            result[0] = '.'; result[1] = '/'; result[2] = '\0';
+            result_len = 2;
+        }
+
+        strcpy( result + result_len, string );
+    }
+
+    return result;
+}
+
+/*
+ * Canonicalize PATH, and return a  new path.  The new path differs from
+ * PATH in that:
+ *
+ *    Multiple `/'s     are collapsed to a single `/'.
+ *    Leading `./'s     are removed.
+ *    Trailing `/.'s    are removed.
+ *    Trailing `/'s     are removed.
+ *    Non-leading `../'s and trailing `..'s are handled by removing
+ *                    portions of the path.
+ */
+static char*
+canonicalize_pathname( char *path )
+{
+    int i, start;
+    char stub_char, *result;
+
+    /* The result cannot be larger than the input PATH. */
+    result = strdup( path );
+
+    stub_char = (*path == '/') ? '/' : '.';
+
+    /* Walk along RESULT looking for things to compact. */
+    i = 0;
+    while (result[i]) {
+        while (result[i] != '\0' && result[i] != '/')
+            i++;
+
+        start = i++;
+
+        /* If we didn't find any  slashes, then there is nothing left to
+         * do.
+         */
+        if (!result[start])
+            break;
+
+        /* Handle multiple `/'s in a row. */
+        while (result[i] == '/')
+            i++;
+
+#if !defined (apollo)
+        if ((start + 1) != i)
+#else
+        if ((start + 1) != i && (start != 0 || i != 2))
+#endif /* apollo */
+        {
+            strcpy( result + start + 1, result + i );
+            i = start + 1;
+        }
+
+        /* Handle backquoted `/'. */
+        if (start > 0 && result[start - 1] == '\\')
+            continue;
+
+        /* Check for trailing `/', and `.' by itself. */
+        if ((start && !result[i])
+            || (result[i] == '.' && !result[i+1])) {
+            result[--i] = '\0';
+            break;
+        }
+
+        /* Check for `../', `./' or trailing `.' by itself. */
+        if (result[i] == '.') {
+            /* Handle `./'. */
+            if (result[i + 1] == '/') {
+                strcpy( result + i, result + i + 1 );
+                i = (start < 0) ? 0 : start;
+                continue;
+            }
+
+            /* Handle `../' or trailing `..' by itself. */
+            if (result[i + 1] == '.' &&
+                (result[i + 2] == '/' || !result[i + 2])) {
+                while (--start > -1 && result[start] != '/')
+                    ;
+                strcpy( result + start + 1, result + i + 2 );
+                i = (start < 0) ? 0 : start;
+                continue;
+            }
+        }
+    }
+
+    if (!*result) {
+        *result = stub_char;
+        result[1] = '\0';
+    }
+
+    return result;
+}
+
+/*
+ * Given a  string containing units of information separated  by colons,
+ * return the next one  pointed to by (P_INDEX), or NULL if there are no
+ * more.  Advance (P_INDEX) to the character after the colon.
+ */
+static char*
+extract_colon_unit( char* pzDir, char const *string, int *p_index )
+{
+    char * pzDest = pzDir;
+    int    ix     = *p_index;
+
+    if (string == NULL)
+        return NULL;
+
+    if ((unsigned)ix >= strlen( string ))
+        return NULL;
+
+    {
+        char const * pzSrc = string + ix;
+
+        while (*pzSrc == ':')  pzSrc++;
+
+        for (;;) {
+            char ch = (*(pzDest++) = *(pzSrc++));
+            switch (ch) {
+            case ':':
+                pzDest[-1] = NUL;
+                /* FALLTHROUGH */
+            case NUL:
+                goto copy_done;
+            }
+
+            if ((unsigned long)(pzDest - pzDir) >= AG_PATH_MAX)
+                break;
+        } copy_done:;
+
+        ix = (int)(pzSrc - string);
+    }
+
+    if (*pzDir == NUL)
+        return NULL;
+
+    *p_index = ix;
+    return pzDir;
+}
+#endif /* __windows__ / __CYGWIN__ */
+#endif /* HAVE_PATHFIND */
+
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of compat/pathfind.c */
diff --git a/sntp/libopts/compat/snprintf.c b/sntp/libopts/compat/snprintf.c
new file mode 100644
index 0000000..eccea1f
--- /dev/null
+++ b/sntp/libopts/compat/snprintf.c
@@ -0,0 +1,62 @@
+
+#ifndef HAVE_VPRINTF
+#include "choke-me: no vprintf and no snprintf"
+  choke me.
+#endif
+
+#if defined(HAVE_STDARG_H)
+#  include <stdarg.h>
+#  ifndef   VA_START
+#    define VA_START(a, f)  va_start(a, f)
+#    define VA_END(a)       va_end(a)
+#  endif /* VA_START */
+#  define SNV_USING_STDARG_H
+
+#elif defined(HAVE_VARARGS_H)
+#  include <varargs.h>
+#  ifndef   VA_START
+#    define VA_START(a, f) va_start(a)
+#    define VA_END(a)    va_end(a)
+#  endif /* VA_START */
+#  undef  SNV_USING_STDARG_H
+
+#else
+#  include "must-have-stdarg-or-varargs"
+  choke me.
+#endif
+
+static int
+snprintf(char *str, size_t n, char const *fmt, ...)
+{
+    va_list ap;
+    int rval;
+
+#ifdef VSPRINTF_CHARSTAR
+    char *rp;
+    VA_START(ap, fmt);
+    rp = vsprintf(str, fmt, ap);
+    VA_END(ap);
+    rval = strlen(rp);
+
+#else
+    VA_START(ap, fmt);
+    rval = vsprintf(str, fmt, ap);
+    VA_END(ap);
+#endif
+
+    if (rval > n) {
+        fprintf(stderr, "snprintf buffer overrun %d > %d\n", rval, (int)n);
+        abort();
+    }
+    return rval;
+}
+
+static int
+vsnprintf( char *str, size_t n, char const *fmt, va_list ap )
+{
+#ifdef VSPRINTF_CHARSTAR
+    return (strlen(vsprintf(str, fmt, ap)));
+#else
+    return (vsprintf(str, fmt, ap));
+#endif
+}
diff --git a/sntp/libopts/compat/strchr.c b/sntp/libopts/compat/strchr.c
new file mode 100644
index 0000000..f409387
--- /dev/null
+++ b/sntp/libopts/compat/strchr.c
@@ -0,0 +1,66 @@
+/*
+   SYNOPSIS
+       #include <string.h>
+
+       char *strchr(char const *s, int c);
+
+       char *strrchr(char const *s, int c);
+
+   DESCRIPTION
+       The  strchr() function returns a pointer to the first occurrence of the
+       character c in the string s.
+
+       The strrchr() function returns a pointer to the last occurrence of  the
+       character c in the string s.
+
+       Here  "character"  means "byte" - these functions do not work with wide
+       or multi-byte characters.
+
+   RETURN VALUE
+       The strchr() and strrchr() functions return a pointer  to  the  matched
+       character or NULL if the character is not found.
+
+   CONFORMING TO
+       SVID 3, POSIX, BSD 4.3, ISO 9899
+*/
+
+static char *
+strchr(char const *s, int c);
+
+static char *
+strrchr(char const *s, int c);
+
+static char *
+strchr(char const *s, int c)
+{
+    do {
+        if ((unsigned char)*s == (unsigned char)c)
+            return s;
+
+    } while (*(++s) != NUL);
+
+    return NULL;
+}
+
+static char *
+strrchr(char const *s, int c)
+{
+    char const *e = s + strlen(s);
+
+    for (;;) {
+        if (--e < s)
+            break;
+
+        if ((unsigned char)*e == (unsigned char)c)
+            return e;
+    }
+    return NULL;
+}
+
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * end of compat/strsignal.c */
diff --git a/sntp/libopts/compat/strdup.c b/sntp/libopts/compat/strdup.c
new file mode 100644
index 0000000..f3a4077
--- /dev/null
+++ b/sntp/libopts/compat/strdup.c
@@ -0,0 +1,22 @@
+/*
+ * Platforms without strdup ?!?!?!
+ */
+
+static char *
+strdup( char const *s );
+
+static char *
+strdup( char const *s )
+{
+    char *cp;
+
+    if (s == NULL)
+        return NULL;
+
+    cp = (char *) AGALOC((unsigned) (strlen(s)+1), "strdup");
+
+    if (cp != NULL)
+        (void) strcpy(cp, s);
+
+    return cp;
+}
diff --git a/sntp/libopts/compat/windows-config.h b/sntp/libopts/compat/windows-config.h
new file mode 100644
index 0000000..78f3202
--- /dev/null
+++ b/sntp/libopts/compat/windows-config.h
@@ -0,0 +1,144 @@
+
+/**
+ * \file windows-config.h
+ *
+ *  This file contains all of the routines that must be linked into
+ *  an executable to use the generated option processing.  The optional
+ *  routines are in separately compiled modules so that they will not
+ *  necessarily be linked in.
+ *
+ *  This file is part of AutoOpts, a companion to AutoGen.
+ *  AutoOpts is free software.
+ *  AutoOpts is Copyright (C) 1992-2014 by Bruce Korb - all rights reserved
+ *
+ *  AutoOpts is available under any one of two licenses.  The license
+ *  in use must be one of these two and the choice is under the control
+ *  of the user of the license.
+ *
+ *   The GNU Lesser General Public License, version 3 or later
+ *      See the files "COPYING.lgplv3" and "COPYING.gplv3"
+ *
+ *   The Modified Berkeley Software Distribution License
+ *      See the file "COPYING.mbsd"
+ *
+ *  These files have the following sha256 sums:
+ *
+ *  8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95  COPYING.gplv3
+ *  4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b  COPYING.lgplv3
+ *  13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239  COPYING.mbsd
+ */
+
+#ifndef WINDOWS_CONFIG_HACKERY
+#define WINDOWS_CONFIG_HACKERY 1
+
+/*
+ * The definitions below have been stolen from NTP's config.h for Windows.
+ * However, they may be kept here in order to keep libopts independent from
+ * the NTP project.
+ */
+#ifndef __windows__
+#  define __windows__ 4
+#endif
+
+/*
+ * Miscellaneous functions that Microsoft maps to other names
+ */
+#define snprintf _snprintf
+
+#define SIZEOF_INT   4
+#define SIZEOF_CHARP 4
+#define SIZEOF_LONG  4
+#define SIZEOF_SHORT 2
+
+#define HAVE_LIMITS_H   1
+#define HAVE_STRDUP     1
+#define HAVE_STRCHR     1
+#define HAVE_FCNTL_H    1
+
+/*
+ * VS.NET's version of wspiapi.h has a bug in it where it assigns a value
+ * to a variable inside an if statement. It should be comparing them.
+ * We prevent inclusion since we are not using this code so we don't have
+ * to see the warning messages
+ */
+#ifndef _WSPIAPI_H_
+#define _WSPIAPI_H_
+#endif
+
+/* Prevent inclusion of winsock.h in windows.h */
+#ifndef _WINSOCKAPI_
+#define _WINSOCKAPI_
+#endif
+
+#ifndef __RPCASYNC_H__
+#define __RPCASYNC_H__
+#endif
+
+/* Include Windows headers */
+#include <windows.h>
+#include <winsock2.h>
+#include <limits.h>
+
+/*
+ * Compatibility declarations for Windows, assuming SYS_WINNT
+ * has been defined.
+ */
+#define strdup  _strdup
+#define stat    _stat       /* struct stat from <sys/stat.h> */
+#define unlink  _unlink
+#define fchmod( _x, _y )
+#define ssize_t SSIZE_T
+
+#include <io.h>
+#define open    _open
+#define close   _close
+#define read    _read
+#define write   _write
+#define lseek   _lseek
+#define pipe    _pipe
+#define dup2    _dup2
+
+#define O_RDWR     _O_RDWR
+#define O_RDONLY   _O_RDONLY
+#define O_EXCL     _O_EXCL
+
+#ifndef S_ISREG
+#  define S_IFREG _S_IFREG
+#  define       S_ISREG(mode)   (((mode) & S_IFREG) == S_IFREG)
+#endif
+
+#ifndef S_ISDIR
+#  define S_IFDIR _S_IFDIR
+#  define       S_ISDIR(mode)   (((mode) & S_IFDIR) == S_IFDIR)
+#endif
+
+/* C99 exact size integer support. */
+#if defined(HAVE_INTTYPES_H)
+# include <inttypes.h>
+
+#elif defined(HAVE_STDINT_H)
+# include <stdint.h>
+# define MISSING_INTTYPES_H 1
+
+#elif ! defined(ADDED_EXACT_SIZE_INTEGERS)
+# define ADDED_EXACT_SIZE_INTEGERS 1
+# define MISSING_INTTYPES_H 1
+
+  typedef __int8 int8_t;
+  typedef unsigned __int8 uint8_t;
+
+  typedef __int16 int16_t;
+  typedef unsigned __int16 uint16_t;
+
+  typedef __int32 int32_t;
+  typedef unsigned __int32 uint32_t;
+
+  typedef __int64 int64_t;
+  typedef unsigned __int64 uint64_t;
+
+  typedef unsigned long uintptr_t;
+  typedef long intptr_t;
+#endif
+
+#endif /* WINDOWS_CONFIG_HACKERY */
+/* windows-config.h ends here */