[PATCH v5 00/16] daemon-win32

@@ -1175,7 +1175,10 @@ int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 int mingw_socket(int domain, int type, int protocol)
 {
 	int sockfd;
-	SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
+	SOCKET s;
+
+	ensure_socket_initialization();
+	s = WSASocket(domain, type, protocol, NULL, 0, 0);
 	if (s == INVALID_SOCKET) {
 		/*
 		 * WSAGetLastError() values are regular BSD error codes

@@ -1205,6 +1208,45 @@ int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
 	return connect(s, sa, sz);
 }
 
+#undef bind
+int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
+{
+	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
+	return bind(s, sa, sz);
+}
+
+#undef setsockopt
+int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
+{
+	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
+	return setsockopt(s, lvl, optname, (const char*)optval, optlen);
+}
+
+#undef listen
+int mingw_listen(int sockfd, int backlog)
+{
+	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
+	return listen(s, backlog);
+}
+
+#undef accept
+int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
+{
+	int sockfd2;
+
+	SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
+	SOCKET s2 = accept(s1, sa, sz);
+
+	/* convert into a file descriptor */
+	if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
+		int err = errno;
+		closesocket(s2);
+		return error("unable to make a socket file descriptor: %s",
+			strerror(err));
+	}
+	return sockfd2;
+}
+
 #undef rename
 int mingw_rename(const char *pold, const char *pnew)
 {

@@ -7,6 +7,7 @@
 
 typedef int pid_t;
 typedef int uid_t;
+typedef int socklen_t;
 #define hstrerror strerror
 
 #define S_IFLNK    0120000 /* Symbolic link */

@@ -47,6 +48,9 @@ typedef int uid_t;
 #define F_SETFD 2
 #define FD_CLOEXEC 0x1
 
+#define EAFNOSUPPORT WSAEAFNOSUPPORT
+#define ECONNABORTED WSAECONNABORTED
+
 struct passwd {
 	char *pw_name;
 	char *pw_gecos;

@@ -225,6 +229,18 @@ int mingw_socket(int domain, int type, int protocol);
 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 #define connect mingw_connect
 
+int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
+#define bind mingw_bind
+
+int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
+#define setsockopt mingw_setsockopt
+
+int mingw_listen(int sockfd, int backlog);
+#define listen mingw_listen
+
+int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
+#define accept mingw_accept
+
 int mingw_rename(const char*, const char*);
 #define rename mingw_rename
 

@@ -1398,9 +1398,11 @@ endif
 endif
 ifdef NO_INET_NTOP
 	LIB_OBJS += compat/inet_ntop.o
+	BASIC_CFLAGS += -DNO_INET_NTOP
 endif
 ifdef NO_INET_PTON
 	LIB_OBJS += compat/inet_pton.o
+	BASIC_CFLAGS += -DNO_INET_PTON
 endif
 
 ifdef NO_ICONV

@@ -17,9 +17,9 @@
 
 #include <errno.h>
 #include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
+
+#include "../git-compat-util.h"
+
 #include <stdio.h>
 #include <string.h>
 

@@ -17,9 +17,9 @@
 
 #include <errno.h>
 #include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
+
+#include "../git-compat-util.h"
+
 #include <stdio.h>
 #include <string.h>
 

@@ -41,7 +41,9 @@
  */
 
 static int inet_pton4(const char *src, unsigned char *dst);
+#ifndef NO_IPV6
 static int inet_pton6(const char *src, unsigned char *dst);
+#endif
 
 /* int
  * inet_pton4(src, dst)

@@ -387,6 +387,14 @@ static inline void *gitmempcpy(void *dest, const void *src, size_t n)
 }
 #endif
 
+#ifdef NO_INET_PTON
+int inet_pton(int af, const char *src, void *dst);
+#endif
+
+#ifdef NO_INET_NTOP
+const char *inet_ntop(int af, const void *src, char *dst, size_t size);
+#endif
+
 extern void release_pack_memory(size_t, int);
 
 typedef void (*try_to_free_t)(size_t);

@@ -496,6 +496,7 @@ LIB_H += compat/bswap.h
 LIB_H += compat/cygwin.h
 LIB_H += compat/mingw.h
 LIB_H += compat/win32/pthread.h
+LIB_H += compat/win32/syslog.h
 LIB_H += csum-file.h
 LIB_H += decorate.h
 LIB_H += delta.h

@@ -1081,7 +1082,7 @@ ifeq ($(uname_S),Windows)
 	AR = compat/vcbuild/scripts/lib.pl
 	CFLAGS =
 	BASIC_CFLAGS = -nologo -I. -I../zlib -Icompat/vcbuild -Icompat/vcbuild/include -DWIN32 -D_CONSOLE -DHAVE_STRING_H -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE
-	COMPAT_OBJS = compat/msvc.o compat/fnmatch/fnmatch.o compat/winansi.o compat/win32/pthread.o
+	COMPAT_OBJS = compat/msvc.o compat/fnmatch/fnmatch.o compat/winansi.o compat/win32/pthread.o compat/win32/syslog.o
 	COMPAT_CFLAGS = -D__USE_MINGW_ACCESS -DNOGDI -DHAVE_STRING_H -DHAVE_ALLOCA_H -Icompat -Icompat/fnmatch -Icompat/regex -Icompat/fnmatch -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
 	BASIC_LDFLAGS = -IGNORE:4217 -IGNORE:4049 -NOLOGO -SUBSYSTEM:CONSOLE -NODEFAULTLIB:MSVCRT.lib
 	EXTLIBS = advapi32.lib shell32.lib wininet.lib ws2_32.lib

@@ -1131,7 +1132,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	COMPAT_CFLAGS += -D__USE_MINGW_ACCESS -DNOGDI -Icompat -Icompat/fnmatch -Icompat/win32
 	COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
 	COMPAT_OBJS += compat/mingw.o compat/fnmatch/fnmatch.o compat/winansi.o \
-		compat/win32/pthread.o
+		compat/win32/pthread.o compat/win32/syslog.o
 	EXTLIBS += -lws2_32
 	PTHREAD_LIBS =
 	X = .exe

@@ -0,0 +1,72 @@
+#include "../../git-compat-util.h"
+#include "../../strbuf.h"
+
+static HANDLE ms_eventlog;
+
+void openlog(const char *ident, int logopt, int facility)
+{
+	if (ms_eventlog)
+		return;
+
+	ms_eventlog = RegisterEventSourceA(NULL, ident);
+
+	if (!ms_eventlog)
+		warning("RegisterEventSource() failed: %lu", GetLastError());
+}
+
+void syslog(int priority, const char *fmt, ...)
+{
+	struct strbuf sb = STRBUF_INIT;
+	struct strbuf_expand_dict_entry dict[] = {
+		{"1", "% 1"},
+		{NULL, NULL}
+	};
+	WORD logtype;
+	char *str;
+	int str_len;
+	va_list ap;
+
+	if (!ms_eventlog)
+		return;
+
+	va_start(ap, fmt);
+	str_len = vsnprintf(NULL, 0, fmt, ap);
+	va_end(ap);
+
+	if (str_len < 0) {
+		warning("vsnprintf failed: '%s'", strerror(errno));
+		return;
+	}
+
+	str = malloc(str_len + 1);
+	va_start(ap, fmt);
+	vsnprintf(str, str_len + 1, fmt, ap);
+	va_end(ap);
+	strbuf_expand(&sb, str, strbuf_expand_dict_cb, &dict);
+	free(str);
+
+	switch (priority) {
+	case LOG_EMERG:
+	case LOG_ALERT:
+	case LOG_CRIT:
+	case LOG_ERR:
+		logtype = EVENTLOG_ERROR_TYPE;
+		break;
+
+	case LOG_WARNING:
+		logtype = EVENTLOG_WARNING_TYPE;
+		break;
+
+	case LOG_NOTICE:
+	case LOG_INFO:
+	case LOG_DEBUG:
+	default:
+		logtype = EVENTLOG_INFORMATION_TYPE;
+		break;
+	}
+
+	ReportEventA(ms_eventlog, logtype, 0, 0, NULL, 1, 0,
+	    (const char **)&sb.buf, NULL);
+
+	strbuf_release(&sb);
+}

@@ -0,0 +1,20 @@
+#ifndef SYSLOG_H
+#define SYSLOG_H
+
+#define LOG_PID     0x01
+
+#define LOG_EMERG   0
+#define LOG_ALERT   1
+#define LOG_CRIT    2
+#define LOG_ERR     3
+#define LOG_WARNING 4
+#define LOG_NOTICE  5
+#define LOG_INFO    6
+#define LOG_DEBUG   7
+
+#define LOG_DAEMON  (3<<3)
+
+void openlog(const char *ident, int logopt, int facility);
+void syslog(int priority, const char *fmt, ...);
+
+#endif /* SYSLOG_H */

@@ -5,8 +5,6 @@
 #include "strbuf.h"
 #include "string-list.h"
 
-#include <syslog.h>
-
 #ifndef HOST_NAME_MAX
 #define HOST_NAME_MAX 256
 #endif

@@ -104,6 +104,7 @@
 #include <assert.h>
 #include <regex.h>
 #include <utime.h>
+#include <syslog.h>
 #ifndef __MINGW32__
 #include <sys/wait.h>
 #include <sys/poll.h>

@@ -50,10 +50,7 @@
  *	Paul Vixie, 1996.
  */
 static const char *
-inet_ntop4(src, dst, size)
-	const u_char *src;
-	char *dst;
-	size_t size;
+inet_ntop4(const u_char *src, char *dst, size_t size)
 {
 	static const char fmt[] = "%u.%u.%u.%u";
 	char tmp[sizeof "255.255.255.255"];

@@ -78,10 +75,7 @@ inet_ntop4(src, dst, size)
  *	Paul Vixie, 1996.
  */
 static const char *
-inet_ntop6(src, dst, size)
-	const u_char *src;
-	char *dst;
-	size_t size;
+inet_ntop6(const u_char *src, char *dst, size_t size)
 {
 	/*
 	 * Note that int32_t and int16_t need only be "at least" large enough

@@ -178,11 +172,7 @@ inet_ntop6(src, dst, size)
  *	Paul Vixie, 1996.
  */
 const char *
-inet_ntop(af, src, dst, size)
-	int af;
-	const void *src;
-	char *dst;
-	size_t size;
+inet_ntop(int af, const void *src, char *dst, size_t size)
 {
 	switch (af) {
 	case AF_INET:

@@ -702,6 +702,13 @@ static int env_compare(const void *a, const void *b)
 	return strcasecmp(*ea, *eb);
 }
 
+struct {
+	pid_t pid;
+	HANDLE proc;
+} *pinfo;
+static int num_pinfo;
+CRITICAL_SECTION pinfo_cs;
+
 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 			      const char *dir,
 			      int prepend_cmd, int fhin, int fhout, int fherr)

@@ -794,7 +801,23 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 		return -1;
 	}
 	CloseHandle(pi.hThread);
-	return (pid_t)pi.hProcess;
+
+	/*
+	 * The process ID is the human-readable identifier of the process
+	 * that we want to present in log and error messages. The handle
+	 * is not useful for this purpose. But we cannot close it, either,
+	 * because it is not possible to turn a process ID into a process
+	 * handle after the process terminated.
+	 * Keep the handle in a list for waitpid.
+	 */
+	EnterCriticalSection(&pinfo_cs);
+	num_pinfo++;
+	pinfo = xrealloc(pinfo, sizeof(*pinfo) * num_pinfo);
+	pinfo[num_pinfo - 1].pid = pi.dwProcessId;
+	pinfo[num_pinfo - 1].proc = pi.hProcess;
+	LeaveCriticalSection(&pinfo_cs);
+
+	return (pid_t)pi.dwProcessId;
 }
 
 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,

@@ -1518,6 +1541,51 @@ char *getpass(const char *prompt)
 	return strbuf_detach(&buf, NULL);
 }
 
+pid_t waitpid(pid_t pid, int *status, unsigned options)
+{
+	HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
+	    FALSE, pid);
+	if (!h) {
+		errno = ECHILD;
+		return -1;
+	}
+
+	if (options == 0) {
+		int i;
+		if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
+			CloseHandle(h);
+			return 0;
+		}
+
+		if (status)
+			GetExitCodeProcess(h, (LPDWORD)status);
+
+		EnterCriticalSection(&pinfo_cs);
+
+		for (i = 0; i < num_pinfo; ++i)
+			if (pinfo[i].pid == pid)
+				break;
+
+		if (i < num_pinfo) {
+			CloseHandle(pinfo[i].proc);
+			memmove(pinfo + i, pinfo + i + 1,
+			    sizeof(*pinfo) * (num_pinfo - i - 1));
+			num_pinfo--;
+			pinfo = xrealloc(pinfo,
+			    sizeof(*pinfo) * num_pinfo);
+		}
+
+		LeaveCriticalSection(&pinfo_cs);
+
+		CloseHandle(h);
+		return pid;
+	}
+	CloseHandle(h);
+
+	errno = EINVAL;
+	return -1;
+}
+
 #ifndef NO_MINGW_REPLACE_READDIR
 /* MinGW readdir implementation to avoid extra lstats for Git */
 struct mingw_DIR

@@ -140,13 +140,7 @@ static inline int mingw_unlink(const char *pathname)
 }
 #define unlink mingw_unlink
 
-static inline pid_t waitpid(pid_t pid, int *status, unsigned options)
-{
-	if (options == 0)
-		return _cwait(status, pid, 0);
-	errno = EINVAL;
-	return -1;
-}
+pid_t waitpid(pid_t pid, int *status, unsigned options);
 
 #ifndef NO_OPENSSL
 #include <openssl/ssl.h>

@@ -321,11 +315,13 @@ void free_environ(char **env);
 static int mingw_main(); \
 int main(int argc, const char **argv) \
 { \
+	extern CRITICAL_SECTION pinfo_cs; \
 	_fmode = _O_BINARY; \
 	_setmode(_fileno(stdin), _O_BINARY); \
 	_setmode(_fileno(stdout), _O_BINARY); \
 	_setmode(_fileno(stderr), _O_BINARY); \
 	argv[0] = xstrdup(_pgmptr); \
+	InitializeCriticalSection(&pinfo_cs); \
 	return mingw_main(argc, argv); \
 } \
 static int mingw_main(c,v)

@@ -1550,6 +1550,12 @@ pid_t waitpid(pid_t pid, int *status, unsigned options)
 		return -1;
 	}
 
+	if (pid > 0 && options & WNOHANG) {
+		if (WAIT_OBJECT_0 != WaitForSingleObject((HANDLE)pid, 0))
+			return 0;
+		options &= ~WNOHANG;
+	}
+
 	if (options == 0) {
 		int i;
 		if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {

@@ -140,6 +140,7 @@ static inline int mingw_unlink(const char *pathname)
 }
 #define unlink mingw_unlink
 
+#define WNOHANG 1
 pid_t waitpid(pid_t pid, int *status, unsigned options);
 
 #ifndef NO_OPENSSL

@@ -932,6 +932,25 @@ void mingw_execv(const char *cmd, char *const *argv)
 	mingw_execve(cmd, argv, environ);
 }
 
+int mingw_kill(pid_t pid, int sig)
+{
+	if (pid > 0 && sig == SIGTERM) {
+		HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+
+		if (TerminateProcess(h, -1)) {
+			CloseHandle(h);
+			return 0;
+		}
+
+		errno = err_win_to_posix(GetLastError());
+		CloseHandle(h);
+		return -1;
+	}
+
+	errno = EINVAL;
+	return -1;
+}
+
 static char **copy_environ(void)
 {
 	char **env;

@@ -143,6 +143,9 @@ static inline int mingw_unlink(const char *pathname)
 #define WNOHANG 1
 pid_t waitpid(pid_t pid, int *status, unsigned options);
 
+#define kill mingw_kill
+int mingw_kill(pid_t pid, int sig);
+
 #ifndef NO_OPENSSL
 #include <openssl/ssl.h>
 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)

@@ -614,17 +614,17 @@ static unsigned int live_children;
 
 static struct child {
 	struct child *next;
-	pid_t pid;
+	struct child_process cld;
 	struct sockaddr_storage address;
 } *firstborn;
 
-static void add_child(pid_t pid, struct sockaddr *addr, int addrlen)
+static void add_child(struct child_process *cld, struct sockaddr *addr, int addrlen)
 {
 	struct child *newborn, **cradle;
 
 	newborn = xcalloc(1, sizeof(*newborn));
 	live_children++;
-	newborn->pid = pid;
+	memcpy(&newborn->cld, cld, sizeof(*cld));
 	memcpy(&newborn->address, addr, addrlen);
 	for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
 		if (!addrcmp(&(*cradle)->address, &newborn->address))

@@ -633,19 +633,6 @@ static void add_child(pid_t pid, struct sockaddr *addr, int addrlen)
 	*cradle = newborn;
 }
 
-static void remove_child(pid_t pid)
-{
-	struct child **cradle, *blanket;
-
-	for (cradle = &firstborn; (blanket = *cradle); cradle = &blanket->next)
-		if (blanket->pid == pid) {
-			*cradle = blanket->next;
-			live_children--;
-			free(blanket);
-			break;
-		}
-}
-
 /*
  * This gets called if the number of connections grows
  * past "max_connections".

@@ -661,7 +648,7 @@ static void kill_some_child(void)
 
 	for (; (next = blanket->next); blanket = next)
 		if (!addrcmp(&blanket->address, &next->address)) {
-			kill(blanket->pid, SIGTERM);
+			kill(blanket->cld.pid, SIGTERM);
 			break;
 		}
 }

@@ -671,18 +658,26 @@ static void check_dead_children(void)
 	int status;
 	pid_t pid;
 
-	while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
-		const char *dead = "";
-		remove_child(pid);
-		if (!WIFEXITED(status) || (WEXITSTATUS(status) > 0))
-			dead = " (with error)";
-		loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
-	}
+	struct child **cradle, *blanket;
+	for (cradle = &firstborn; (blanket = *cradle);)
+		if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 0) {
+			const char *dead = "";
+			if (status)
+				dead = " (with error)";
+			loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
+
+			/* remove the child */
+			*cradle = blanket->next;
+			live_children--;
+			free(blanket);
+		} else
+			cradle = &blanket->next;
 }
 
+static char **cld_argv;
 static void handle(int incoming, struct sockaddr *addr, int addrlen)
 {
-	pid_t pid;
+	struct child_process cld = { 0 };
 
 	if (max_connections && live_children >= max_connections) {
 		kill_some_child();

@@ -695,22 +690,15 @@ static void handle(int incoming, struct sockaddr *addr, int addrlen)
 		}
 	}
 
-	if ((pid = fork())) {
-		close(incoming);
-		if (pid < 0) {
-			logerror("Couldn't fork %s", strerror(errno));
-			return;
-		}
-
-		add_child(pid, addr, addrlen);
-		return;
-	}
+	cld.argv = (const char **)cld_argv;
+	cld.in = incoming;
+	cld.out = dup(incoming);
 
-	dup2(incoming, 0);
-	dup2(incoming, 1);
+	if (start_command(&cld))
+		logerror("unable to fork");
+	else
+		add_child(&cld, addr, addrlen);
 	close(incoming);
-
-	exit(execute(addr));
 }
 
 static void child_handler(int signo)

@@ -991,7 +979,7 @@ int main(int argc, char **argv)
 {
 	int listen_port = 0;
 	struct string_list listen_addr = STRING_LIST_INIT_NODUP;
-	int inetd_mode = 0;
+	int serve_mode = 0, inetd_mode = 0;
 	const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
 	int detach = 0;
 	struct passwd *pass = NULL;

@@ -1017,6 +1005,10 @@ int main(int argc, char **argv)
 				continue;
 			}
 		}
+		if (!strcmp(arg, "--serve")) {
+			serve_mode = 1;
+			continue;
+		}
 		if (!strcmp(arg, "--inetd")) {
 			inetd_mode = 1;
 			log_syslog = 1;

@@ -1162,13 +1154,15 @@ int main(int argc, char **argv)
 		    base_path);
 
 	if (inetd_mode) {
+		if (!freopen("/dev/null", "w", stderr))
+			die_errno("failed to redirect stderr to /dev/null");
+	}
+
+	if (inetd_mode || serve_mode) {
 		struct sockaddr_storage ss;
 		struct sockaddr *peer = (struct sockaddr *)&ss;
 		socklen_t slen = sizeof(ss);
 
-		if (!freopen("/dev/null", "w", stderr))
-			die_errno("failed to redirect stderr to /dev/null");
-
 		if (getpeername(0, peer, &slen))
 			peer = NULL;
 

@@ -1185,5 +1179,12 @@ int main(int argc, char **argv)
 	if (pid_file)
 		store_pid(pid_file);
 
+	/* prepare argv for serving-processes */
+	cld_argv = xmalloc(sizeof (char *) * (argc + 2));
+	for (i = 0; i < argc; ++i)
+		cld_argv[i] = argv[i];
+	cld_argv[argc] = "--serve";
+	cld_argv[argc+1] = NULL;
+
 	return serve(&listen_addr, listen_port, pass, gid);
 }

@@ -67,12 +67,14 @@ static void logreport(int priority, const char *err, va_list params)
 		syslog(priority, "%s", buf);
 	} else {
 		/*
-		 * Since stderr is set to linebuffered mode, the
+		 * Since stderr is set to buffered mode, the
 		 * logging of different processes will not overlap
+		 * unless they overflow the (rather big) buffers.
 		 */
 		fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
 		vfprintf(stderr, err, params);
 		fputc('\n', stderr);
+		fflush(stderr);
 	}
 }
 

@@ -1117,7 +1119,7 @@ int main(int argc, char **argv)
 		set_die_routine(daemon_die);
 	} else
 		/* avoid splitting a message in the middle */
-		setvbuf(stderr, NULL, _IOLBF, 0);
+		setvbuf(stderr, NULL, _IOFBF, 4096);
 
 	if (inetd_mode && (group_name || user_name))
 		die("--user and --group are incompatible with --inetd");

@@ -516,37 +516,14 @@ static void parse_host_arg(char *extra_args, int buflen)
 }
 
 
-static int execute(struct sockaddr *addr)
+static int execute(void)
 {
 	static char line[1000];
 	int pktlen, len, i;
+	char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
 
-	if (addr) {
-		char addrbuf[256] = "";
-		int port = -1;
-
-		if (addr->sa_family == AF_INET) {
-			struct sockaddr_in *sin_addr = (void *) addr;
-			inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf));
-			port = ntohs(sin_addr->sin_port);
-#ifndef NO_IPV6
-		} else if (addr && addr->sa_family == AF_INET6) {
-			struct sockaddr_in6 *sin6_addr = (void *) addr;
-
-			char *buf = addrbuf;
-			*buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
-			inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1);
-			strcat(buf, "]");
-
-			port = ntohs(sin6_addr->sin6_port);
-#endif
-		}
-		loginfo("Connection from %s:%d", addrbuf, port);
-		setenv("REMOTE_ADDR", addrbuf, 1);
-	}
-	else {
-		unsetenv("REMOTE_ADDR");
-	}
+	if (addr)
+		loginfo("Connection from %s:%s", addr, port);
 
 	alarm(init_timeout ? init_timeout : timeout);
 	pktlen = packet_read_line(0, line, sizeof(line));

@@ -680,6 +657,8 @@ static char **cld_argv;
 static void handle(int incoming, struct sockaddr *addr, int addrlen)
 {
 	struct child_process cld = { 0 };
+	char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
+	char *env[] = { addrbuf, portbuf, NULL };
 
 	if (max_connections && live_children >= max_connections) {
 		kill_some_child();

@@ -692,6 +671,28 @@ static void handle(int incoming, struct sockaddr *addr, int addrlen)
 		}
 	}
 
+	if (addr->sa_family == AF_INET) {
+		struct sockaddr_in *sin_addr = (void *) addr;
+		inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
+		    sizeof(addrbuf) - 12);
+		snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
+		    ntohs(sin_addr->sin_port));
+#ifndef NO_IPV6
+	} else if (addr && addr->sa_family == AF_INET6) {
+		struct sockaddr_in6 *sin6_addr = (void *) addr;
+
+		char *buf = addrbuf + 12;
+		*buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
+		inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
+		    sizeof(addrbuf) - 13);
+		strcat(buf, "]");
+
+		snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
+		    ntohs(sin6_addr->sin6_port));
+#endif
+	}
+
+	cld.env = (const char **)env;
 	cld.argv = (const char **)cld_argv;
 	cld.in = incoming;
 	cld.out = dup(incoming);

@@ -1160,16 +1161,8 @@ int main(int argc, char **argv)
 			die_errno("failed to redirect stderr to /dev/null");
 	}
 
-	if (inetd_mode || serve_mode) {
-		struct sockaddr_storage ss;
-		struct sockaddr *peer = (struct sockaddr *)&ss;
-		socklen_t slen = sizeof(ss);
-
-		if (getpeername(0, peer, &slen))
-			peer = NULL;
-
-		return execute(peer);
-	}
+	if (inetd_mode || serve_mode)
+		return execute();
 
 	if (detach) {
 		daemonize();

@@ -1035,19 +1035,22 @@ static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
 				   const struct addrinfo *hints,
 				   struct addrinfo **res)
 {
-	struct hostent *h = gethostbyname(node);
+	struct hostent *h = NULL;
 	struct addrinfo *ai;
 	struct sockaddr_in *sin;
 
-	if (!h)
-		return WSAGetLastError();
+	if (node) {
+		h = gethostbyname(node);
+		if (!h)
+			return WSAGetLastError();
+	}
 
 	ai = xmalloc(sizeof(struct addrinfo));
 	*res = ai;
 	ai->ai_flags = 0;
 	ai->ai_family = AF_INET;
-	ai->ai_socktype = hints->ai_socktype;
-	switch (hints->ai_socktype) {
+	ai->ai_socktype = hints ? hints->ai_socktype : 0;
+	switch (ai->ai_socktype) {
 	case SOCK_STREAM:
 		ai->ai_protocol = IPPROTO_TCP;
 		break;

@@ -1059,14 +1062,25 @@ static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
 		break;
 	}
 	ai->ai_addrlen = sizeof(struct sockaddr_in);
-	ai->ai_canonname = strdup(h->h_name);
+	if (hints && (hints->ai_flags & AI_CANONNAME))
+		ai->ai_canonname = h ? strdup(h->h_name) : NULL;
+	else
+		ai->ai_canonname = NULL;
 
 	sin = xmalloc(ai->ai_addrlen);
 	memset(sin, 0, ai->ai_addrlen);
 	sin->sin_family = AF_INET;
+	/* Note: getaddrinfo is supposed to allow service to be a string,
+	 * which should be looked up using getservbyname. This is
+	 * currently not implemented */
 	if (service)
 		sin->sin_port = htons(atoi(service));
-	sin->sin_addr = *(struct in_addr *)h->h_addr;
+	if (h)
+		sin->sin_addr = *(struct in_addr *)h->h_addr;
+	else if (hints && (hints->ai_flags & AI_PASSIVE))
+		sin->sin_addr.s_addr = INADDR_ANY;
+	else
+		sin->sin_addr.s_addr = INADDR_LOOPBACK;
 	ai->ai_addr = (struct sockaddr *)sin;
 	ai->ai_next = 0;
 	return 0;

@@ -0,0 +1,597 @@
+/* Emulation for poll(2)
+   Contributed by Paolo Bonzini.
+
+   Copyright 2001-2003, 2006-2010 Free Software Foundation, Inc.
+
+   This file is part of gnulib.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Tell gcc not to warn about the (nfd < 0) tests, below.  */
+#if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wtype-limits"
+#endif
+
+#include <config.h>
+#include <alloca.h>
+
+#include <sys/types.h>
+#include "poll.h"
+#include <errno.h>
+#include <limits.h>
+#include <assert.h>
+
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# define WIN32_NATIVE
+# include <winsock2.h>
+# include <windows.h>
+# include <io.h>
+# include <stdio.h>
+# include <conio.h>
+#else
+# include <sys/time.h>
+# include <sys/socket.h>
+# include <sys/select.h>
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_IOCTL_H
+# include <sys/ioctl.h>
+#endif
+#ifdef HAVE_SYS_FILIO_H
+# include <sys/filio.h>
+#endif
+
+#include <time.h>
+
+#ifndef INFTIM
+# define INFTIM (-1)
+#endif
+
+/* BeOS does not have MSG_PEEK.  */
+#ifndef MSG_PEEK
+# define MSG_PEEK 0
+#endif
+
+#ifdef WIN32_NATIVE
+
+#define IsConsoleHandle(h) (((long) (h) & 3) == 3)
+
+static BOOL
+IsSocketHandle (HANDLE h)
+{
+  WSANETWORKEVENTS ev;
+
+  if (IsConsoleHandle (h))
+    return FALSE;
+
+  /* Under Wine, it seems that getsockopt returns 0 for pipes too.
+     WSAEnumNetworkEvents instead distinguishes the two correctly.  */
+  ev.lNetworkEvents = 0xDEADBEEF;
+  WSAEnumNetworkEvents ((SOCKET) h, NULL, &ev);
+  return ev.lNetworkEvents != 0xDEADBEEF;
+}
+
+/* Declare data structures for ntdll functions.  */
+typedef struct _FILE_PIPE_LOCAL_INFORMATION {
+  ULONG NamedPipeType;
+  ULONG NamedPipeConfiguration;
+  ULONG MaximumInstances;
+  ULONG CurrentInstances;
+  ULONG InboundQuota;
+  ULONG ReadDataAvailable;
+  ULONG OutboundQuota;
+  ULONG WriteQuotaAvailable;
+  ULONG NamedPipeState;
+  ULONG NamedPipeEnd;
+} FILE_PIPE_LOCAL_INFORMATION, *PFILE_PIPE_LOCAL_INFORMATION;
+
+typedef struct _IO_STATUS_BLOCK
+{
+  union {
+    DWORD Status;
+    PVOID Pointer;
+  } u;
+  ULONG_PTR Information;
+} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
+
+typedef enum _FILE_INFORMATION_CLASS {
+  FilePipeLocalInformation = 24
+} FILE_INFORMATION_CLASS, *PFILE_INFORMATION_CLASS;
+
+typedef DWORD (WINAPI *PNtQueryInformationFile)
+         (HANDLE, IO_STATUS_BLOCK *, VOID *, ULONG, FILE_INFORMATION_CLASS);
+
+# ifndef PIPE_BUF
+#  define PIPE_BUF      512
+# endif
+
+/* Compute revents values for file handle H.  If some events cannot happen
+   for the handle, eliminate them from *P_SOUGHT.  */
+
+static int
+win32_compute_revents (HANDLE h, int *p_sought)
+{
+  int i, ret, happened;
+  INPUT_RECORD *irbuffer;
+  DWORD avail, nbuffer;
+  BOOL bRet;
+  IO_STATUS_BLOCK iosb;
+  FILE_PIPE_LOCAL_INFORMATION fpli;
+  static PNtQueryInformationFile NtQueryInformationFile;
+  static BOOL once_only;
+
+  switch (GetFileType (h))
+    {
+    case FILE_TYPE_PIPE:
+      if (!once_only)
+        {
+          NtQueryInformationFile = (PNtQueryInformationFile)
+            GetProcAddress (GetModuleHandle ("ntdll.dll"),
+                            "NtQueryInformationFile");
+          once_only = TRUE;
+        }
+
+      happened = 0;
+      if (PeekNamedPipe (h, NULL, 0, NULL, &avail, NULL) != 0)
+        {
+          if (avail)
+            happened |= *p_sought & (POLLIN | POLLRDNORM);
+        }
+      else if (GetLastError () == ERROR_BROKEN_PIPE)
+        happened |= POLLHUP;
+
+      else
+        {
+          /* It was the write-end of the pipe.  Check if it is writable.
+             If NtQueryInformationFile fails, optimistically assume the pipe is
+             writable.  This could happen on Win9x, where NtQueryInformationFile
+             is not available, or if we inherit a pipe that doesn't permit
+             FILE_READ_ATTRIBUTES access on the write end (I think this should
+             not happen since WinXP SP2; WINE seems fine too).  Otherwise,
+             ensure that enough space is available for atomic writes.  */
+          memset (&iosb, 0, sizeof (iosb));
+          memset (&fpli, 0, sizeof (fpli));
+
+          if (!NtQueryInformationFile
+              || NtQueryInformationFile (h, &iosb, &fpli, sizeof (fpli),
+                                         FilePipeLocalInformation)
+              || fpli.WriteQuotaAvailable >= PIPE_BUF
+              || (fpli.OutboundQuota < PIPE_BUF &&
+                  fpli.WriteQuotaAvailable == fpli.OutboundQuota))
+            happened |= *p_sought & (POLLOUT | POLLWRNORM | POLLWRBAND);
+        }
+      return happened;
+
+    case FILE_TYPE_CHAR:
+      ret = WaitForSingleObject (h, 0);
+      if (!IsConsoleHandle (h))
+        return ret == WAIT_OBJECT_0 ? *p_sought & ~(POLLPRI | POLLRDBAND) : 0;
+
+      nbuffer = avail = 0;
+      bRet = GetNumberOfConsoleInputEvents (h, &nbuffer);
+      if (bRet)
+        {
+          /* Input buffer.  */
+          *p_sought &= POLLIN | POLLRDNORM;
+          if (nbuffer == 0)
+            return POLLHUP;
+          if (!*p_sought)
+            return 0;
+
+          irbuffer = (INPUT_RECORD *) alloca (nbuffer * sizeof (INPUT_RECORD));
+          bRet = PeekConsoleInput (h, irbuffer, nbuffer, &avail);
+          if (!bRet || avail == 0)
+            return POLLHUP;
+
+          for (i = 0; i < avail; i++)
+            if (irbuffer[i].EventType == KEY_EVENT)
+              return *p_sought;
+          return 0;
+        }
+      else
+        {
+          /* Screen buffer.  */
+          *p_sought &= POLLOUT | POLLWRNORM | POLLWRBAND;
+          return *p_sought;
+        }
+
+    default:
+      ret = WaitForSingleObject (h, 0);
+      if (ret == WAIT_OBJECT_0)
+        return *p_sought & ~(POLLPRI | POLLRDBAND);
+
+      return *p_sought & (POLLOUT | POLLWRNORM | POLLWRBAND);
+    }
+}
+
+/* Convert fd_sets returned by select into revents values.  */
+
+static int
+win32_compute_revents_socket (SOCKET h, int sought, long lNetworkEvents)
+{
+  int happened = 0;
+
+  if ((lNetworkEvents & (FD_READ | FD_ACCEPT | FD_CLOSE)) == FD_ACCEPT)
+    happened |= (POLLIN | POLLRDNORM) & sought;
+
+  else if (lNetworkEvents & (FD_READ | FD_ACCEPT | FD_CLOSE))
+    {
+      int r, error;
+
+      char data[64];
+      WSASetLastError (0);
+      r = recv (h, data, sizeof (data), MSG_PEEK);
+      error = WSAGetLastError ();
+      WSASetLastError (0);
+
+      if (r > 0 || error == WSAENOTCONN)
+        happened |= (POLLIN | POLLRDNORM) & sought;
+
+      /* Distinguish hung-up sockets from other errors.  */
+      else if (r == 0 || error == WSAESHUTDOWN || error == WSAECONNRESET
+               || error == WSAECONNABORTED || error == WSAENETRESET)
+        happened |= POLLHUP;
+
+      else
+        happened |= POLLERR;
+    }
+
+  if (lNetworkEvents & (FD_WRITE | FD_CONNECT))
+    happened |= (POLLOUT | POLLWRNORM | POLLWRBAND) & sought;
+
+  if (lNetworkEvents & FD_OOB)
+    happened |= (POLLPRI | POLLRDBAND) & sought;
+
+  return happened;
+}
+
+#else /* !MinGW */
+
+/* Convert select(2) returned fd_sets into poll(2) revents values.  */
+static int
+compute_revents (int fd, int sought, fd_set *rfds, fd_set *wfds, fd_set *efds)
+{
+  int happened = 0;
+  if (FD_ISSET (fd, rfds))
+    {
+      int r;
+      int socket_errno;
+
+# if defined __MACH__ && defined __APPLE__
+      /* There is a bug in Mac OS X that causes it to ignore MSG_PEEK
+         for some kinds of descriptors.  Detect if this descriptor is a
+         connected socket, a server socket, or something else using a
+         0-byte recv, and use ioctl(2) to detect POLLHUP.  */
+      r = recv (fd, NULL, 0, MSG_PEEK);
+      socket_errno = (r < 0) ? errno : 0;
+      if (r == 0 || socket_errno == ENOTSOCK)
+        ioctl (fd, FIONREAD, &r);
+# else
+      char data[64];
+      r = recv (fd, data, sizeof (data), MSG_PEEK);
+      socket_errno = (r < 0) ? errno : 0;
+# endif
+      if (r == 0)
+        happened |= POLLHUP;
+
+      /* If the event happened on an unconnected server socket,
+         that's fine. */
+      else if (r > 0 || ( /* (r == -1) && */ socket_errno == ENOTCONN))
+        happened |= (POLLIN | POLLRDNORM) & sought;
+
+      /* Distinguish hung-up sockets from other errors.  */
+      else if (socket_errno == ESHUTDOWN || socket_errno == ECONNRESET
+               || socket_errno == ECONNABORTED || socket_errno == ENETRESET)
+        happened |= POLLHUP;
+
+      else
+        happened |= POLLERR;
+    }
+
+  if (FD_ISSET (fd, wfds))
+    happened |= (POLLOUT | POLLWRNORM | POLLWRBAND) & sought;
+
+  if (FD_ISSET (fd, efds))
+    happened |= (POLLPRI | POLLRDBAND) & sought;
+
+  return happened;
+}
+#endif /* !MinGW */
+
+int
+poll (pfd, nfd, timeout)
+     struct pollfd *pfd;
+     nfds_t nfd;
+     int timeout;
+{
+#ifndef WIN32_NATIVE
+  fd_set rfds, wfds, efds;
+  struct timeval tv;
+  struct timeval *ptv;
+  int maxfd, rc;
+  nfds_t i;
+
+# ifdef _SC_OPEN_MAX
+  static int sc_open_max = -1;
+
+  if (nfd < 0
+      || (nfd > sc_open_max
+          && (sc_open_max != -1
+              || nfd > (sc_open_max = sysconf (_SC_OPEN_MAX)))))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+# else /* !_SC_OPEN_MAX */
+#  ifdef OPEN_MAX
+  if (nfd < 0 || nfd > OPEN_MAX)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+#  endif /* OPEN_MAX -- else, no check is needed */
+# endif /* !_SC_OPEN_MAX */
+
+  /* EFAULT is not necessary to implement, but let's do it in the
+     simplest case. */
+  if (!pfd)
+    {
+      errno = EFAULT;
+      return -1;
+    }
+
+  /* convert timeout number into a timeval structure */
+  if (timeout == 0)
+    {
+      ptv = &tv;
+      ptv->tv_sec = 0;
+      ptv->tv_usec = 0;
+    }
+  else if (timeout > 0)
+    {
+      ptv = &tv;
+      ptv->tv_sec = timeout / 1000;
+      ptv->tv_usec = (timeout % 1000) * 1000;
+    }
+  else if (timeout == INFTIM)
+    /* wait forever */
+    ptv = NULL;
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* create fd sets and determine max fd */
+  maxfd = -1;
+  FD_ZERO (&rfds);
+  FD_ZERO (&wfds);
+  FD_ZERO (&efds);
+  for (i = 0; i < nfd; i++)
+    {
+      if (pfd[i].fd < 0)
+        continue;
+
+      if (pfd[i].events & (POLLIN | POLLRDNORM))
+        FD_SET (pfd[i].fd, &rfds);
+
+      /* see select(2): "the only exceptional condition detectable
+         is out-of-band data received on a socket", hence we push
+         POLLWRBAND events onto wfds instead of efds. */
+      if (pfd[i].events & (POLLOUT | POLLWRNORM | POLLWRBAND))
+        FD_SET (pfd[i].fd, &wfds);
+      if (pfd[i].events & (POLLPRI | POLLRDBAND))
+        FD_SET (pfd[i].fd, &efds);
+      if (pfd[i].fd >= maxfd
+          && (pfd[i].events & (POLLIN | POLLOUT | POLLPRI
+                               | POLLRDNORM | POLLRDBAND
+                               | POLLWRNORM | POLLWRBAND)))
+        {
+          maxfd = pfd[i].fd;
+          if (maxfd > FD_SETSIZE)
+            {
+              errno = EOVERFLOW;
+              return -1;
+            }
+        }
+    }
+
+  /* examine fd sets */
+  rc = select (maxfd + 1, &rfds, &wfds, &efds, ptv);
+  if (rc < 0)
+    return rc;
+
+  /* establish results */
+  rc = 0;
+  for (i = 0; i < nfd; i++)
+    if (pfd[i].fd < 0)
+      pfd[i].revents = 0;
+    else
+      {
+        int happened = compute_revents (pfd[i].fd, pfd[i].events,
+                                        &rfds, &wfds, &efds);
+        if (happened)
+          {
+            pfd[i].revents = happened;
+            rc++;
+          }
+      }
+
+  return rc;
+#else
+  static struct timeval tv0;
+  static HANDLE hEvent;
+  WSANETWORKEVENTS ev;
+  HANDLE h, handle_array[FD_SETSIZE + 2];
+  DWORD ret, wait_timeout, nhandles;
+  fd_set rfds, wfds, xfds;
+  BOOL poll_again;
+  MSG msg;
+  int rc = 0;
+  nfds_t i;
+
+  if (nfd < 0 || timeout < -1)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  if (!hEvent)
+    hEvent = CreateEvent (NULL, FALSE, FALSE, NULL);
+
+  handle_array[0] = hEvent;
+  nhandles = 1;
+  FD_ZERO (&rfds);
+  FD_ZERO (&wfds);
+  FD_ZERO (&xfds);
+
+  /* Classify socket handles and create fd sets. */
+  for (i = 0; i < nfd; i++)
+    {
+      int sought = pfd[i].events;
+      pfd[i].revents = 0;
+      if (pfd[i].fd < 0)
+        continue;
+      if (!(sought & (POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM | POLLWRBAND
+                      | POLLPRI | POLLRDBAND)))
+        continue;
+
+      h = (HANDLE) _get_osfhandle (pfd[i].fd);
+      assert (h != NULL);
+      if (IsSocketHandle (h))
+        {
+          int requested = FD_CLOSE;
+
+          /* see above; socket handles are mapped onto select.  */
+          if (sought & (POLLIN | POLLRDNORM))
+            {
+              requested |= FD_READ | FD_ACCEPT;
+              FD_SET ((SOCKET) h, &rfds);
+            }
+          if (sought & (POLLOUT | POLLWRNORM | POLLWRBAND))
+            {
+              requested |= FD_WRITE | FD_CONNECT;
+              FD_SET ((SOCKET) h, &wfds);
+            }
+          if (sought & (POLLPRI | POLLRDBAND))
+            {
+              requested |= FD_OOB;
+              FD_SET ((SOCKET) h, &xfds);
+            }
+
+          if (requested)
+            WSAEventSelect ((SOCKET) h, hEvent, requested);
+        }
+      else
+        {
+          /* Poll now.  If we get an event, do not poll again.  Also,
+             screen buffer handles are waitable, and they'll block until
+             a character is available.  win32_compute_revents eliminates
+             bits for the "wrong" direction. */
+          pfd[i].revents = win32_compute_revents (h, &sought);
+          if (sought)
+            handle_array[nhandles++] = h;
+          if (pfd[i].revents)
+            timeout = 0;
+        }
+    }
+
+  if (select (0, &rfds, &wfds, &xfds, &tv0) > 0)
+    {
+      /* Do MsgWaitForMultipleObjects anyway to dispatch messages, but
+         no need to call select again.  */
+      poll_again = FALSE;
+      wait_timeout = 0;
+    }
+  else
+    {
+      poll_again = TRUE;
+      if (timeout == INFTIM)
+        wait_timeout = INFINITE;
+      else
+        wait_timeout = timeout;
+    }
+
+  for (;;)
+    {
+      ret = MsgWaitForMultipleObjects (nhandles, handle_array, FALSE,
+                                       wait_timeout, QS_ALLINPUT);
+
+      if (ret == WAIT_OBJECT_0 + nhandles)
+        {
+          /* new input of some other kind */
+          BOOL bRet;
+          while ((bRet = PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) != 0)
+            {
+              TranslateMessage (&msg);
+              DispatchMessage (&msg);
+            }
+        }
+      else
+        break;
+    }
+
+  if (poll_again)
+    select (0, &rfds, &wfds, &xfds, &tv0);
+
+  /* Place a sentinel at the end of the array.  */
+  handle_array[nhandles] = NULL;
+  nhandles = 1;
+  for (i = 0; i < nfd; i++)
+    {
+      int happened;
+
+      if (pfd[i].fd < 0)
+        continue;
+      if (!(pfd[i].events & (POLLIN | POLLRDNORM |
+                             POLLOUT | POLLWRNORM | POLLWRBAND)))
+        continue;
+
+      h = (HANDLE) _get_osfhandle (pfd[i].fd);
+      if (h != handle_array[nhandles])
+        {
+          /* It's a socket.  */
+          WSAEnumNetworkEvents ((SOCKET) h, NULL, &ev);
+          WSAEventSelect ((SOCKET) h, 0, 0);
+
+          /* If we're lucky, WSAEnumNetworkEvents already provided a way
+             to distinguish FD_READ and FD_ACCEPT; this saves a recv later.  */
+          if (FD_ISSET ((SOCKET) h, &rfds)
+              && !(ev.lNetworkEvents & (FD_READ | FD_ACCEPT)))
+            ev.lNetworkEvents |= FD_READ | FD_ACCEPT;
+          if (FD_ISSET ((SOCKET) h, &wfds))
+            ev.lNetworkEvents |= FD_WRITE | FD_CONNECT;
+          if (FD_ISSET ((SOCKET) h, &xfds))
+            ev.lNetworkEvents |= FD_OOB;
+
+          happened = win32_compute_revents_socket ((SOCKET) h, pfd[i].events,
+                                                   ev.lNetworkEvents);
+        }
+      else
+        {
+          /* Not a socket.  */
+          int sought = pfd[i].events;
+          happened = win32_compute_revents (h, &sought);
+          nhandles++;
+        }
+
+       if ((pfd[i].revents |= happened) != 0)
+        rc++;
+    }
+
+  return rc;
+#endif
+}