Use the standard _WIN32, not the Torism MS_WINDOWS or deprecated WIN32

This commit is completely mechanical; I used this perl script to make it:

 #!/usr/bin/perl -w -i.bak -p

 if (/^\s*\#/) {
     s/MS_WINDOWS/_WIN32/g;
     s/\bWIN32\b/_WIN32/g;
 }

9 files changed, 98 insertions, 98 deletions

diff --git a/src/common/address.c b/src/common/address.c
index e18ef9546..17cda42cb 100644
--- a/src/common/address.c
+++ b/src/common/address.c
@@ -15,7 +15,7 @@
 #include "torlog.h"
 #include "container.h"
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #include <process.h>
 #include <windows.h>
 #include <winsock2.h>
@@ -275,7 +275,7 @@ tor_addr_lookup(const char *name, uint16_t family, tor_addr_t *addr)
     ent = err ? NULL : &hent;
 #else
     ent = gethostbyname(name);
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     err = WSAGetLastError();
 #else
     err = h_errno;
@@ -291,7 +291,7 @@ tor_addr_lookup(const char *name, uint16_t family, tor_addr_t *addr)
       }
       return 0;
     }
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     return (err == WSATRY_AGAIN) ? 1 : -1;
 #else
     return (err == TRY_AGAIN) ? 1 : -1;
@@ -1101,7 +1101,7 @@ tor_addr_port_lookup(const char *s, tor_addr_t *addr_out, uint16_t *port_out)
   return -1;
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 typedef ULONG (WINAPI *GetAdaptersAddresses_fn_t)(
               ULONG, ULONG, PVOID, PIP_ADAPTER_ADDRESSES, PULONG);
 #endif
@@ -1140,7 +1140,7 @@ get_interface_addresses_raw(int severity)
 
   freeifaddrs(ifa);
   return result;
-#elif defined(MS_WINDOWS)
+#elif defined(_WIN32)
   /* Windows XP began to provide GetAdaptersAddresses. Windows 2000 had a
      "GetAdaptersInfo", but that's deprecated; let's just try
      GetAdaptersAddresses and fall back to connect+getsockname.
diff --git a/src/common/compat.c b/src/common/compat.c
index cd112035c..64c06681d 100644
--- a/src/common/compat.c
+++ b/src/common/compat.c
@@ -21,7 +21,7 @@
 
 #include "compat.h"
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #include <process.h>
 #include <windows.h>
 #include <sys/locking.h>
@@ -205,7 +205,7 @@ tor_munmap_file(tor_mmap_t *handle)
   munmap((char*)handle->data, handle->mapping_size);
   tor_free(handle);
 }
-#elif defined(MS_WINDOWS)
+#elif defined(_WIN32)
 tor_mmap_t *
 tor_mmap_file(const char *filename)
 {
@@ -341,7 +341,7 @@ tor_vsnprintf(char *str, size_t size, const char *format, va_list args)
     return -1; /* no place for the NUL */
   if (size > SIZE_T_CEILING)
     return -1;
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   r = _vsnprintf(str, size, format, args);
 #else
   r = vsnprintf(str, size, format, args);
@@ -570,7 +570,7 @@ tor_strtok_r_impl(char *str, const char *sep, char **lasts)
   return start;
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 /** Take a filename and return a pointer to its final element.  This
  * function is called on __FILE__ to fix a MSVC nit where __FILE__
  * contains the full path to the file.  This is bad, because it
@@ -670,7 +670,7 @@ set_uint64(void *cp, uint64_t v)
 int
 replace_file(const char *from, const char *to)
 {
-#ifndef MS_WINDOWS
+#ifndef _WIN32
   return rename(from,to);
 #else
   switch (file_status(to))
@@ -739,7 +739,7 @@ tor_lockfile_lock(const char *filename, int blocking, int *locked_out)
     return NULL;
   }
 
-#ifdef WIN32
+#ifdef _WIN32
   _lseek(fd, 0, SEEK_SET);
   if (_locking(fd, blocking ? _LK_LOCK : _LK_NBLCK, 1) < 0) {
     if (errno != EACCES && errno != EDEADLOCK)
@@ -788,7 +788,7 @@ tor_lockfile_unlock(tor_lockfile_t *lockfile)
   tor_assert(lockfile);
 
   log_info(LD_FS, "Unlocking \"%s\"", lockfile->filename);
-#ifdef WIN32
+#ifdef _WIN32
   _lseek(lockfile->fd, 0, SEEK_SET);
   if (_locking(lockfile->fd, _LK_UNLCK, 1) < 0) {
     log_warn(LD_FS,"Error unlocking \"%s\": %s", lockfile->filename,
@@ -824,7 +824,7 @@ tor_lockfile_unlock(tor_lockfile_t *lockfile)
 off_t
 tor_fd_getpos(int fd)
 {
-#ifdef WIN32
+#ifdef _WIN32
   return (off_t) _lseek(fd, 0, SEEK_CUR);
 #else
   return (off_t) lseek(fd, 0, SEEK_CUR);
@@ -835,7 +835,7 @@ tor_fd_getpos(int fd)
 int
 tor_fd_seekend(int fd)
 {
-#ifdef WIN32
+#ifdef _WIN32
   return _lseek(fd, 0, SEEK_END) < 0 ? -1 : 0;
 #else
   return lseek(fd, 0, SEEK_END) < 0 ? -1 : 0;
@@ -888,7 +888,7 @@ tor_close_socket(tor_socket_t s)
    * tor_close_socket to close sockets, and always using close() on
    * files.
    */
-#if defined(MS_WINDOWS)
+#if defined(_WIN32)
   r = closesocket(s);
 #else
   r = close(s);
@@ -909,7 +909,7 @@ tor_close_socket(tor_socket_t s)
   } else {
     int err = tor_socket_errno(-1);
     log_info(LD_NET, "Close returned an error: %s", tor_socket_strerror(err));
-#ifdef WIN32
+#ifdef _WIN32
     if (err != WSAENOTSOCK)
       --n_sockets_open;
 #else
@@ -1016,7 +1016,7 @@ get_n_open_sockets(void)
 void
 set_socket_nonblocking(tor_socket_t socket)
 {
-#if defined(MS_WINDOWS)
+#if defined(_WIN32)
   unsigned long nonblocking = 1;
   ioctlsocket(socket, FIONBIO, (unsigned long*) &nonblocking);
 #else
@@ -1045,7 +1045,7 @@ int
 tor_socketpair(int family, int type, int protocol, tor_socket_t fd[2])
 {
 //don't use win32 socketpairs (they are always bad)
-#if defined(HAVE_SOCKETPAIR) && !defined(MS_WINDOWS)
+#if defined(HAVE_SOCKETPAIR) && !defined(_WIN32)
   int r;
 #ifdef SOCK_CLOEXEC
   type |= SOCK_CLOEXEC;
@@ -1089,7 +1089,7 @@ tor_socketpair(int family, int type, int protocol, tor_socket_t fd[2])
         || family != AF_UNIX
 #endif
         ) {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
       return -WSAEAFNOSUPPORT;
 #else
       return -EAFNOSUPPORT;
@@ -1149,7 +1149,7 @@ tor_socketpair(int family, int type, int protocol, tor_socket_t fd[2])
     return 0;
 
   abort_tidy_up_and_fail:
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     saved_errno = WSAECONNABORTED;
 #else
     saved_errno = ECONNABORTED; /* I hope this is portable and appropriate.  */
@@ -1191,7 +1191,7 @@ set_max_file_descriptors(rlim_t limit, int *max_out)
 #if defined(CYGWIN) || defined(__CYGWIN__)
   const char *platform = "Cygwin";
   const unsigned long MAX_CONNECTIONS = 3200;
-#elif defined(MS_WINDOWS)
+#elif defined(_WIN32)
   const char *platform = "Windows";
   const unsigned long MAX_CONNECTIONS = 15000;
 #else
@@ -1274,7 +1274,7 @@ set_max_file_descriptors(rlim_t limit, int *max_out)
   return 0;
 }
 
-#ifndef MS_WINDOWS
+#ifndef _WIN32
 /** Log details of current user and group credentials. Return 0 on
  * success. Logs and return -1 on failure.
  */
@@ -1380,7 +1380,7 @@ log_credential_status(void)
 int
 switch_id(const char *user)
 {
-#ifndef MS_WINDOWS
+#ifndef _WIN32
   struct passwd *pw = NULL;
   uid_t old_uid;
   gid_t old_gid;
@@ -1591,7 +1591,7 @@ get_parent_directory(char *fname)
   char *cp;
   int at_end = 1;
   tor_assert(fname);
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   /* If we start with, say, c:, then don't consider that the start of the path
    */
   if (fname[0] && fname[1] == ':') {
@@ -1608,7 +1608,7 @@ get_parent_directory(char *fname)
   at_end = 1;
   while (--cp > fname) {
     int is_sep = (*cp == '/'
-#ifdef MS_WINDOWS
+#ifdef _WIN32
                   || *cp == '\\'
 #endif
                   );
@@ -1628,7 +1628,7 @@ get_parent_directory(char *fname)
 char *
 make_path_absolute(char *fname)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   char *absfname_malloced = _fullpath(NULL, fname, 1);
 
   /* We don't want to assume that tor_free can free a string allocated
@@ -1900,7 +1900,7 @@ tor_lookup_hostname(const char *name, uint32_t *addr)
 void
 tor_init_weak_random(unsigned seed)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   srand(seed);
 #else
   srandom(seed);
@@ -1913,7 +1913,7 @@ tor_init_weak_random(unsigned seed)
 long
 tor_weak_random(void)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   return rand();
 #else
   return random();
@@ -1942,7 +1942,7 @@ get_uname(void)
     } else
 #endif
       {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
         OSVERSIONINFOEX info;
         int i;
         const char *plat = NULL;
@@ -2144,7 +2144,7 @@ spawn_exit(void)
 static int
 compute_num_cpus_impl(void)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   SYSTEM_INFO info;
   memset(&info, 0, sizeof(info));
   GetSystemInfo(&info);
@@ -2192,7 +2192,7 @@ compute_num_cpus(void)
 void
 tor_gettimeofday(struct timeval *timeval)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   /* Epoch bias copied from perl: number of units between windows epoch and
    * Unix epoch. */
 #define EPOCH_BIAS U64_LITERAL(116444736000000000)
@@ -2237,7 +2237,7 @@ tor_gettimeofday(struct timeval *timeval)
   return;
 }
 
-#if defined(TOR_IS_MULTITHREADED) && !defined(MS_WINDOWS)
+#if defined(TOR_IS_MULTITHREADED) && !defined(_WIN32)
 /** Defined iff we need to add locks when defining fake versions of reentrant
  * versions of time-related functions. */
 #define TIME_FNS_NEED_LOCKS
@@ -2781,7 +2781,7 @@ in_main_thread(void)
  * should call tor_socket_errno <em>at most once</em> on the failing
  * socket to get the error.
  */
-#if defined(MS_WINDOWS)
+#if defined(_WIN32)
 int
 tor_socket_errno(tor_socket_t sock)
 {
@@ -2797,7 +2797,7 @@ tor_socket_errno(tor_socket_t sock)
 }
 #endif
 
-#if defined(MS_WINDOWS)
+#if defined(_WIN32)
 #define E(code, s) { code, (s " [" #code " ]") }
 struct { int code; const char *msg; } windows_socket_errors[] = {
   E(WSAEINTR, "Interrupted function call"),
@@ -2879,7 +2879,7 @@ tor_socket_strerror(int e)
 int
 network_init(void)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   /* This silly exercise is necessary before windows will allow
    * gethostbyname to work. */
   WSADATA WSAData;
@@ -2901,7 +2901,7 @@ network_init(void)
   return 0;
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 /** Return a newly allocated string describing the windows system error code
  * <b>err</b>.  Note that error codes are different from errno.  Error codes
  * come from GetLastError() when a winapi call fails.  errno is set only when
diff --git a/src/common/compat.h b/src/common/compat.h
index 4329d4536..fa1ef90eb 100644
--- a/src/common/compat.h
+++ b/src/common/compat.h
@@ -8,7 +8,7 @@
 
 #include "orconfig.h"
 #include "torint.h"
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #ifndef WIN32_WINNT
 #define WIN32_WINNT 0x400
 #endif
@@ -35,7 +35,7 @@
 #ifdef HAVE_STRING_H
 #include <string.h>
 #endif
-#if defined(HAVE_PTHREAD_H) && !defined(MS_WINDOWS)
+#if defined(HAVE_PTHREAD_H) && !defined(_WIN32)
 #include <pthread.h>
 #endif
 #include <stdarg.h>
@@ -89,7 +89,7 @@
 #endif
 
 /* inline is __inline on windows. */
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #define INLINE __inline
 #else
 #define INLINE inline
@@ -196,7 +196,7 @@ extern INLINE double U64_TO_DBL(uint64_t x) {
 #endif
 
 /* ===== String compatibility */
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 /* Windows names string functions differently from most other platforms. */
 #define strncasecmp _strnicmp
 #define strcasecmp _stricmp
@@ -249,7 +249,7 @@ typedef struct tor_mmap_t {
 #ifdef HAVE_SYS_MMAN_H
   size_t mapping_size; /**< Size of the actual mapping. (This is this file
                         * size, rounded up to the nearest page.) */
-#elif defined MS_WINDOWS
+#elif defined _WIN32
   HANDLE file_handle;
   HANDLE mmap_handle;
 #endif
@@ -307,7 +307,7 @@ char *tor_strtok_r_impl(char *str, const char *sep, char **lasts);
 #define tor_strtok_r(str, sep, lasts) tor_strtok_r_impl(str, sep, lasts)
 #endif
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #define _SHORT_FILE_ (tor_fix_source_file(__FILE__))
 const char *tor_fix_source_file(const char *fname);
 #else
@@ -386,7 +386,7 @@ void tor_lockfile_unlock(tor_lockfile_t *lockfile);
 off_t tor_fd_getpos(int fd);
 int tor_fd_seekend(int fd);
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #define PATH_SEPARATOR "\\"
 #else
 #define PATH_SEPARATOR "/"
@@ -398,7 +398,7 @@ int tor_fd_seekend(int fd);
 typedef int socklen_t;
 #endif
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 /* XXX Actually, this should arguably be SOCKET; we use intptr_t here so that
  * any inadvertant checks for the socket being <= 0 or > 0 will probably
  * still work. */
@@ -499,7 +499,7 @@ int network_init(void);
  * errnos against expected values, and use tor_socket_errno to find
  * the actual errno after a socket operation fails.
  */
-#if defined(MS_WINDOWS)
+#if defined(_WIN32)
 /** Return true if e is EAGAIN or the local equivalent. */
 #define ERRNO_IS_EAGAIN(e)           ((e) == EAGAIN || (e) == WSAEWOULDBLOCK)
 /** Return true if e is EINPROGRESS or the local equivalent. */
@@ -584,7 +584,7 @@ char *make_path_absolute(char *fname);
 int spawn_func(void (*func)(void *), void *data);
 void spawn_exit(void) ATTR_NORETURN;
 
-#if defined(ENABLE_THREADS) && defined(MS_WINDOWS)
+#if defined(ENABLE_THREADS) && defined(_WIN32)
 #define USE_WIN32_THREADS
 #define TOR_IS_MULTITHREADED 1
 #elif (defined(ENABLE_THREADS) && defined(HAVE_PTHREAD_H) && \
@@ -666,14 +666,14 @@ void tor_cond_signal_all(tor_cond_t *cond);
 #endif
 
 /* Platform-specific helpers. */
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 char *format_win32_error(DWORD err);
 #endif
 
 /*for some reason my compiler doesn't have these version flags defined
   a nice homework assignment for someone one day is to define the rest*/
 //these are the values as given on MSDN
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 
 #ifndef VER_SUITE_EMBEDDEDNT
 #define VER_SUITE_EMBEDDEDNT 0x00000040
diff --git a/src/common/compat_libevent.c b/src/common/compat_libevent.c
index 0cedef8d5..70e3baf9d 100644
--- a/src/common/compat_libevent.c
+++ b/src/common/compat_libevent.c
@@ -205,7 +205,7 @@ tor_libevent_initialize(tor_libevent_cfg *torcfg)
     cfg = event_config_new();
     tor_assert(cfg);
 
-#if defined(MS_WINDOWS) && defined(USE_BUFFEREVENTS)
+#if defined(_WIN32) && defined(USE_BUFFEREVENTS)
     if (! torcfg->disable_iocp) {
       evthread_use_windows_threads();
       event_config_set_flag(cfg, EVENT_BASE_FLAG_STARTUP_IOCP);
@@ -241,7 +241,7 @@ tor_libevent_initialize(tor_libevent_cfg *torcfg)
       /* This could be a socketpair() failure, which can happen sometimes on
        * windows boxes with obnoxious firewall rules.  Downgrade and try
        * again. */
-#if defined(MS_WINDOWS) && defined(USE_BUFFEREVENTS)
+#if defined(_WIN32) && defined(USE_BUFFEREVENTS)
       if (torcfg->disable_iocp == 0) {
         log_warn(LD_GENERAL, "Unable to initialize Libevent. Trying again "
                  "with IOCP disabled.");
diff --git a/src/common/crypto.c b/src/common/crypto.c
index 6bc54fc44..380dcf0ab 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -12,7 +12,7 @@
 
 #include "orconfig.h"
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #ifndef WIN32_WINNT
 #define WIN32_WINNT 0x400
 #endif
@@ -2409,7 +2409,7 @@ crypto_seed_rng(int startup)
   int rand_poll_status = 0;
 
   /* local variables */
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   unsigned char buf[ADD_ENTROPY];
   static int provider_set = 0;
   static HCRYPTPROV provider;
@@ -2431,7 +2431,7 @@ crypto_seed_rng(int startup)
       log_warn(LD_CRYPTO, "RAND_poll() failed.");
   }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (!provider_set) {
     if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
                              CRYPT_VERIFYCONTEXT)) {
diff --git a/src/common/procmon.c b/src/common/procmon.c
index 5c10e9a22..85d2a2fe3 100644
--- a/src/common/procmon.c
+++ b/src/common/procmon.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #endif
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #include <windows.h>
 
 /* Windows does not define pid_t, but _getpid() returns an int. */
@@ -91,7 +91,7 @@ struct tor_process_monitor_t {
    * polls. */
   pid_t pid;
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   /** Windows-only: Should we poll hproc?  If false, poll pid
    * instead. */
   int poll_hproc;
@@ -192,7 +192,7 @@ tor_process_monitor_new(struct event_base *base,
 
   procmon->pid = ppspec.pid;
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   procmon->hproc = OpenProcess(PROCESS_QUERY_INFORMATION | SYNCHRONIZE,
                                FALSE,
                                procmon->pid);
@@ -246,7 +246,7 @@ tor_process_monitor_poll_cb(evutil_socket_t unused1, short unused2,
 
   tor_assert(procmon != NULL);
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (procmon->poll_hproc) {
     DWORD exit_code;
     if (!GetExitCodeProcess(procmon->hproc, &exit_code)) {
@@ -323,7 +323,7 @@ tor_process_monitor_free(tor_process_monitor_t *procmon)
   if (procmon == NULL)
     return;
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (procmon->hproc != NULL)
     CloseHandle(procmon->hproc);
 #endif
diff --git a/src/common/tortls.c b/src/common/tortls.c
index 570dd005f..26d37145a 100644
--- a/src/common/tortls.c
+++ b/src/common/tortls.c
@@ -21,7 +21,7 @@
 #endif
 
 #include <assert.h>
-#ifdef MS_WINDOWS /*wrkard for dtls1.h >= 0.9.8m of "#include <winsock.h>"*/
+#ifdef _WIN32 /*wrkard for dtls1.h >= 0.9.8m of "#include <winsock.h>"*/
  #ifndef WIN32_WINNT
  #define WIN32_WINNT 0x400
  #endif
@@ -333,7 +333,7 @@ tls_log_errors(tor_tls_t *tls, int severity, int domain, const char *doing)
 static int
 tor_errno_to_tls_error(int e)
 {
-#if defined(MS_WINDOWS)
+#if defined(_WIN32)
   switch (e) {
     case WSAECONNRESET: // most common
       return TOR_TLS_ERROR_CONNRESET;
diff --git a/src/common/util.c b/src/common/util.c
index 40efff051..ac37f1ba3 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -26,7 +26,7 @@
 #include "container.h"
 #include "address.h"
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 #include <io.h>
 #include <direct.h>
 #include <process.h>
@@ -915,7 +915,7 @@ tor_parse_uint64(const char *s, int base, uint64_t min,
 
 #ifdef HAVE_STRTOULL
   r = (uint64_t)strtoull(s, &endptr, base);
-#elif defined(MS_WINDOWS)
+#elif defined(_WIN32)
 #if defined(_MSC_VER) && _MSC_VER < 1300
   tor_assert(base <= 10);
   r = (uint64_t)_atoi64(s);
@@ -1731,7 +1731,7 @@ read_all(tor_socket_t fd, char *buf, size_t count, int isSocket)
 static void
 clean_name_for_stat(char *name)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   size_t len = strlen(name);
   if (!len)
     return;
@@ -1790,7 +1790,7 @@ check_private_dir(const char *dirname, cpd_check_t check,
   int r;
   struct stat st;
   char *f;
-#ifndef MS_WINDOWS
+#ifndef _WIN32
   int mask;
   struct passwd *pw = NULL;
   uid_t running_uid;
@@ -1812,7 +1812,7 @@ check_private_dir(const char *dirname, cpd_check_t check,
     }
     if (check & CPD_CREATE) {
       log_info(LD_GENERAL, "Creating directory %s", dirname);
-#if defined (MS_WINDOWS) && !defined (WINCE)
+#if defined (_WIN32) && !defined (WINCE)
       r = mkdir(dirname);
 #else
       r = mkdir(dirname, 0700);
@@ -1834,7 +1834,7 @@ check_private_dir(const char *dirname, cpd_check_t check,
     log_warn(LD_FS, "%s is not a directory", dirname);
     return -1;
   }
-#ifndef MS_WINDOWS
+#ifndef _WIN32
   if (effective_user) {
     /* Look up the user and group information.
      * If we have a problem, bail out. */
@@ -1921,7 +1921,7 @@ check_private_dir(const char *dirname, cpd_check_t check,
 int
 write_str_to_file(const char *fname, const char *str, int bin)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (!bin && strchr(str, '\r')) {
     log_warn(LD_BUG,
              "We're writing a text string that already contains a CR.");
@@ -2263,7 +2263,7 @@ read_file_to_str(const char *filename, int flags, struct stat *stat_out)
   }
   string[r] = '\0'; /* NUL-terminate the result. */
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (!bin && strchr(string, '\r')) {
     log_debug(LD_FS, "We didn't convert CRLF to LF as well as we hoped "
               "when reading %s. Coping.",
@@ -2544,7 +2544,7 @@ char *
 expand_filename(const char *filename)
 {
   tor_assert(filename);
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   return tor_strdup(filename);
 #else
   if (*filename == '~') {
@@ -2780,7 +2780,7 @@ smartlist_t *
 tor_listdir(const char *dirname)
 {
   smartlist_t *result;
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   char *pattern=NULL;
   TCHAR tpattern[MAX_PATH] = {0};
   char name[MAX_PATH] = {0};
@@ -2843,7 +2843,7 @@ path_is_relative(const char *filename)
 {
   if (filename && filename[0] == '/')
     return 0;
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   else if (filename && filename[0] == '\\')
     return 0;
   else if (filename && strlen(filename)>3 && TOR_ISALPHA(filename[0]) &&
@@ -2858,7 +2858,7 @@ path_is_relative(const char *filename)
  * Process helpers
  * ===== */
 
-#ifndef MS_WINDOWS
+#ifndef _WIN32
 /* Based on code contributed by christian grothoff */
 /** True iff we've called start_daemon(). */
 static int start_daemon_called = 0;
@@ -2995,7 +2995,7 @@ write_pidfile(char *filename)
     log_warn(LD_FS, "Unable to open \"%s\" for writing: %s", filename,
              strerror(errno));
   } else {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     fprintf(pidfile, "%d\n", (int)_getpid());
 #else
     fprintf(pidfile, "%d\n", (int)getpid());
@@ -3004,7 +3004,7 @@ write_pidfile(char *filename)
   }
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 HANDLE
 load_windows_system_library(const TCHAR *library_name)
 {
@@ -3191,7 +3191,7 @@ format_helper_exit_status(unsigned char child_state, int saved_errno,
 int
 tor_terminate_process(process_handle_t *process_handle)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (tor_get_exit_code(process_handle, 0, NULL) == PROCESS_EXIT_RUNNING) {
     HANDLE handle;
     /* If the signal is outside of what GenerateConsoleCtrlEvent can use,
@@ -3217,14 +3217,14 @@ tor_terminate_process(process_handle_t *process_handle)
 int
 tor_process_get_pid(process_handle_t *process_handle)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   return (int) process_handle->pid.dwProcessId;
 #else
   return (int) process_handle->pid;
 #endif
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 HANDLE
 tor_process_get_stdout_pipe(process_handle_t *process_handle)
 {
@@ -3243,7 +3243,7 @@ process_handle_new(void)
 {
   process_handle_t *out = tor_malloc_zero(sizeof(process_handle_t));
 
-#ifndef MS_WINDOWS
+#ifndef _WIN32
   out->stdout_pipe = -1;
   out->stderr_pipe = -1;
 #endif
@@ -3284,14 +3284,14 @@ process_handle_new(void)
  */
 int
 tor_spawn_background(const char *const filename, const char **argv,
-#ifdef MS_WINDOWS
+#ifdef _WIN32
                      LPVOID envp,
 #else
                      const char **envp,
 #endif
                      process_handle_t **process_handle_out)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   HANDLE stdout_pipe_read = NULL;
   HANDLE stdout_pipe_write = NULL;
   HANDLE stderr_pipe_read = NULL;
@@ -3393,7 +3393,7 @@ tor_spawn_background(const char *const filename, const char **argv,
   /* TODO: Close pipes on exit */
   *process_handle_out = process_handle;
   return status;
-#else // MS_WINDOWS
+#else // _WIN32
   pid_t pid;
   int stdout_pipe[2];
   int stderr_pipe[2];
@@ -3574,7 +3574,7 @@ tor_spawn_background(const char *const filename, const char **argv,
 
   *process_handle_out = process_handle;
   return process_handle->status;
-#endif // MS_WINDOWS
+#endif // _WIN32
 }
 
 /** Destroy all resources allocated by the process handle in
@@ -3600,7 +3600,7 @@ tor_process_handle_destroy(process_handle_t *process_handle,
 
   process_handle->status = PROCESS_STATUS_NOTRUNNING;
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   if (process_handle->stdout_pipe)
     CloseHandle(process_handle->stdout_pipe);
 
@@ -3632,7 +3632,7 @@ int
 tor_get_exit_code(const process_handle_t *process_handle,
                   int block, int *exit_code)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   DWORD retval;
   BOOL success;
 
@@ -3687,12 +3687,12 @@ tor_get_exit_code(const process_handle_t *process_handle,
 
   if (exit_code != NULL)
     *exit_code = WEXITSTATUS(stat_loc);
-#endif // MS_WINDOWS
+#endif // _WIN32
 
   return PROCESS_EXIT_EXITED;
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 /** Read from a handle <b>h</b> into <b>buf</b>, up to <b>count</b> bytes.  If
  * <b>hProcess</b> is NULL, the function will return immediately if there is
  * nothing more to read. Otherwise <b>hProcess</b> should be set to the handle
@@ -3814,7 +3814,7 @@ ssize_t
 tor_read_all_from_process_stdout(const process_handle_t *process_handle,
                                  char *buf, size_t count)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   return tor_read_all_handle(process_handle->stdout_pipe, buf, count,
                              process_handle);
 #else
@@ -3828,7 +3828,7 @@ ssize_t
 tor_read_all_from_process_stderr(const process_handle_t *process_handle,
                                  char *buf, size_t count)
 {
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   return tor_read_all_handle(process_handle->stderr_pipe, buf, count,
                              process_handle);
 #else
@@ -3890,7 +3890,7 @@ tor_split_lines(smartlist_t *sl, char *buf, int len)
   return smartlist_len(sl);
 }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 /** Read from stream, and send lines to log at the specified log level.
  * Returns -1 if there is a error reading, and 0 otherwise.
  * If the generated stream is flushed more often than on new lines, or
@@ -4103,7 +4103,7 @@ tor_check_port_forwarding(const char *filename, int dir_port, int or_port,
       child_handle = NULL;
     }
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     /* Passing NULL as lpApplicationName makes Windows search for the .exe */
     status = tor_spawn_background(NULL, argv, NULL, &child_handle);
 #else
@@ -4126,7 +4126,7 @@ tor_check_port_forwarding(const char *filename, int dir_port, int or_port,
   if (child_handle && PROCESS_STATUS_RUNNING == child_handle->status) {
     /* Read from stdout/stderr and log result */
     retval = 0;
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     stdout_status = log_from_handle(child_handle->stdout_pipe, LOG_INFO);
     stderr_status = log_from_handle(child_handle->stderr_pipe, LOG_WARN);
     /* If we got this far (on Windows), the process started */
@@ -4146,7 +4146,7 @@ tor_check_port_forwarding(const char *filename, int dir_port, int or_port,
     if (-1 == stdout_status || -1 == stderr_status)
       /* There was a failure */
       retval = -1;
-#ifdef MS_WINDOWS
+#ifdef _WIN32
     else if (!child_handle || tor_get_exit_code(child_handle, 0, NULL) !=
              PROCESS_EXIT_RUNNING) {
       /* process has exited or there was an error */
diff --git a/src/common/util.h b/src/common/util.h
index b15b1ea56..1bad24bf7 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -364,7 +364,7 @@ void tor_check_port_forwarding(const char *filename,
 
 typedef struct process_handle_t process_handle_t;
 int tor_spawn_background(const char *const filename, const char **argv,
-#ifdef MS_WINDOWS
+#ifdef _WIN32
                          LPVOID envp,
 #else
                          const char **envp,
@@ -373,7 +373,7 @@ int tor_spawn_background(const char *const filename, const char **argv,
 
 #define SPAWN_ERROR_MESSAGE "ERR: Failed to spawn background process - code "
 
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 HANDLE load_windows_system_library(const TCHAR *library_name);
 #endif
 
@@ -388,7 +388,7 @@ HANDLE load_windows_system_library(const TCHAR *library_name);
 /*DOCDOC*/
 struct process_handle_t {
   int status;
-#ifdef MS_WINDOWS
+#ifdef _WIN32
   HANDLE stdout_pipe;
   HANDLE stderr_pipe;
   PROCESS_INFORMATION pid;
@@ -398,7 +398,7 @@ struct process_handle_t {
   FILE *stdout_handle;
   FILE *stderr_handle;
   pid_t pid;
-#endif // MS_WINDOWS
+#endif // _WIN32
 };
 #endif
 
@@ -409,7 +409,7 @@ struct process_handle_t {
 int tor_get_exit_code(const process_handle_t *process_handle,
                       int block, int *exit_code);
 int tor_split_lines(struct smartlist_t *sl, char *buf, int len);
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 ssize_t tor_read_all_handle(HANDLE h, char *buf, size_t count,
                             const process_handle_t *process);
 #else
@@ -424,7 +424,7 @@ ssize_t tor_read_all_from_process_stderr(
 char *tor_join_win_cmdline(const char *argv[]);
 
 int tor_process_get_pid(process_handle_t *process_handle);
-#ifdef MS_WINDOWS
+#ifdef _WIN32
 HANDLE tor_process_get_stdout_pipe(process_handle_t *process_handle);
 #else
 FILE *tor_process_get_stdout_pipe(process_handle_t *process_handle);