Upgrade to Encode 1.52, from Dan Kogai.

[perl5.git] / win32 / win32.c

/* WIN32.C
 *
 * (c) 1995 Microsoft Corporation. All rights reserved.
 * 		Developed by hip communications inc., http://info.hip.com/info/
 * Portions (c) 1993 Intergraph Corporation. All rights reserved.
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 */
#define PERLIO_NOT_STDIO 0
#define WIN32_LEAN_AND_MEAN
#define WIN32IO_IS_STDIO
#include <tchar.h>
#ifdef __GNUC__
#define Win32_Winsock
#endif
#include <windows.h>
#ifndef __MINGW32__	/* GCC/Mingw32-2.95.2 forgot the WINAPI on CommandLineToArgvW() */
#  include <shellapi.h>
#else
   LPWSTR* WINAPI CommandLineToArgvW(LPCWSTR lpCommandLine, int * pNumArgs);
#endif
#include <winnt.h>
#include <io.h>
#include <signal.h>

/* #include "config.h" */

#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
#define PerlIO FILE
#endif

#include <sys/stat.h>
#include "EXTERN.h"
#include "perl.h"

#define NO_XSLOCKS
#define PERL_NO_GET_CONTEXT
#include "XSUB.h"

#include "Win32iop.h"
#include <fcntl.h>
#ifndef __GNUC__
/* assert.h conflicts with #define of assert in perl.h */
#include <assert.h>
#endif
#include <string.h>
#include <stdarg.h>
#include <float.h>
#include <time.h>
#if defined(_MSC_VER) || defined(__MINGW32__)
#include <sys/utime.h>
#else
#include <utime.h>
#endif
#ifdef __GNUC__
/* Mingw32 defaults to globing command line
 * So we turn it off like this:
 */
int _CRT_glob = 0;
#endif

#if defined(__MINGW32__)
/* Mingw32 is missing some prototypes */
FILE * _wfopen(LPCWSTR wszFileName, LPCWSTR wszMode);
FILE * _wfdopen(int nFd, LPCWSTR wszMode);
FILE * _freopen(LPCWSTR wszFileName, LPCWSTR wszMode, FILE * pOldStream);
int _flushall();
int _fcloseall();
#endif

#if defined(__BORLANDC__)
#  define _stat stat
#  define _utimbuf utimbuf
#endif

#define EXECF_EXEC 1
#define EXECF_SPAWN 2
#define EXECF_SPAWN_NOWAIT 3

#if defined(PERL_IMPLICIT_SYS)
#  undef win32_get_privlib
#  define win32_get_privlib g_win32_get_privlib
#  undef win32_get_sitelib
#  define win32_get_sitelib g_win32_get_sitelib
#  undef win32_get_vendorlib
#  define win32_get_vendorlib g_win32_get_vendorlib
#  undef do_spawn
#  define do_spawn g_do_spawn
#  undef getlogin
#  define getlogin g_getlogin
#endif

static void		get_shell(void);
static long		tokenize(const char *str, char **dest, char ***destv);
	int		do_spawn2(char *cmd, int exectype);
static BOOL		has_shell_metachars(char *ptr);
static long		filetime_to_clock(PFILETIME ft);
static BOOL		filetime_from_time(PFILETIME ft, time_t t);
static char *		get_emd_part(SV **leading, char *trailing, ...);
static void		remove_dead_process(long deceased);
static long		find_pid(int pid);
static char *		qualified_path(const char *cmd);
static char *		win32_get_xlib(const char *pl, const char *xlib,
				       const char *libname);

#ifdef USE_ITHREADS
static void		remove_dead_pseudo_process(long child);
static long		find_pseudo_pid(int pid);
#endif

START_EXTERN_C
HANDLE	w32_perldll_handle = INVALID_HANDLE_VALUE;
char	w32_module_name[MAX_PATH+1];
END_EXTERN_C

static DWORD	w32_platform = (DWORD)-1;

#define ONE_K_BUFSIZE	1024

int
IsWin95(void)
{
    return (win32_os_id() == VER_PLATFORM_WIN32_WINDOWS);
}

int
IsWinNT(void)
{
    return (win32_os_id() == VER_PLATFORM_WIN32_NT);
}

EXTERN_C void
set_w32_module_name(void)
{
    char* ptr;
    GetModuleFileName((HMODULE)((w32_perldll_handle == INVALID_HANDLE_VALUE)
				? GetModuleHandle(NULL)
				: w32_perldll_handle),
		      w32_module_name, sizeof(w32_module_name));

    /* try to get full path to binary (which may be mangled when perl is
     * run from a 16-bit app) */
    /*PerlIO_printf(Perl_debug_log, "Before %s\n", w32_module_name);*/
    (void)win32_longpath(w32_module_name);
    /*PerlIO_printf(Perl_debug_log, "After  %s\n", w32_module_name);*/

    /* normalize to forward slashes */
    ptr = w32_module_name;
    while (*ptr) {
	if (*ptr == '\\')
	    *ptr = '/';
	++ptr;
    }
}

/* *svp (if non-NULL) is expected to be POK (valid allocated SvPVX(*svp)) */
static char*
get_regstr_from(HKEY hkey, const char *valuename, SV **svp)
{
    /* Retrieve a REG_SZ or REG_EXPAND_SZ from the registry */
    HKEY handle;
    DWORD type;
    const char *subkey = "Software\\Perl";
    char *str = Nullch;
    long retval;

    retval = RegOpenKeyEx(hkey, subkey, 0, KEY_READ, &handle);
    if (retval == ERROR_SUCCESS) {
	DWORD datalen;
	retval = RegQueryValueEx(handle, valuename, 0, &type, NULL, &datalen);
	if (retval == ERROR_SUCCESS
	    && (type == REG_SZ || type == REG_EXPAND_SZ))
	{
	    dTHX;
	    if (!*svp)
		*svp = sv_2mortal(newSVpvn("",0));
	    SvGROW(*svp, datalen);
	    retval = RegQueryValueEx(handle, valuename, 0, NULL,
				     (PBYTE)SvPVX(*svp), &datalen);
	    if (retval == ERROR_SUCCESS) {
		str = SvPVX(*svp);
		SvCUR_set(*svp,datalen-1);
	    }
	}
	RegCloseKey(handle);
    }
    return str;
}

/* *svp (if non-NULL) is expected to be POK (valid allocated SvPVX(*svp)) */
static char*
get_regstr(const char *valuename, SV **svp)
{
    char *str = get_regstr_from(HKEY_CURRENT_USER, valuename, svp);
    if (!str)
	str = get_regstr_from(HKEY_LOCAL_MACHINE, valuename, svp);
    return str;
}

/* *prev_pathp (if non-NULL) is expected to be POK (valid allocated SvPVX(sv)) */
static char *
get_emd_part(SV **prev_pathp, char *trailing_path, ...)
{
    char base[10];
    va_list ap;
    char mod_name[MAX_PATH+1];
    char *ptr;
    char *optr;
    char *strip;
    int oldsize, newsize;
    STRLEN baselen;

    va_start(ap, trailing_path);
    strip = va_arg(ap, char *);

    sprintf(base, "%d.%d", (int)PERL_REVISION, (int)PERL_VERSION);
    baselen = strlen(base);

    if (!*w32_module_name) {
	set_w32_module_name();
    }
    strcpy(mod_name, w32_module_name);
    ptr = strrchr(mod_name, '/');
    while (ptr && strip) {
        /* look for directories to skip back */
	optr = ptr;
	*ptr = '\0';
	ptr = strrchr(mod_name, '/');
	/* avoid stripping component if there is no slash,
	 * or it doesn't match ... */
	if (!ptr || stricmp(ptr+1, strip) != 0) {
	    /* ... but not if component matches m|5\.$patchlevel.*| */
	    if (!ptr || !(*strip == '5' && *(ptr+1) == '5'
			  && strncmp(strip, base, baselen) == 0
			  && strncmp(ptr+1, base, baselen) == 0))
	    {
		*optr = '/';
		ptr = optr;
	    }
	}
	strip = va_arg(ap, char *);
    }
    if (!ptr) {
	ptr = mod_name;
	*ptr++ = '.';
	*ptr = '/';
    }
    va_end(ap);
    strcpy(++ptr, trailing_path);

    /* only add directory if it exists */
    if (GetFileAttributes(mod_name) != (DWORD) -1) {
	/* directory exists */
	dTHX;
	if (!*prev_pathp)
	    *prev_pathp = sv_2mortal(newSVpvn("",0));
	sv_catpvn(*prev_pathp, ";", 1);
	sv_catpv(*prev_pathp, mod_name);
	return SvPVX(*prev_pathp);
    }

    return Nullch;
}

char *
win32_get_privlib(const char *pl)
{
    dTHX;
    char *stdlib = "lib";
    char buffer[MAX_PATH+1];
    SV *sv = Nullsv;

    /* $stdlib = $HKCU{"lib-$]"} || $HKLM{"lib-$]"} || $HKCU{"lib"} || $HKLM{"lib"} || "";  */
    sprintf(buffer, "%s-%s", stdlib, pl);
    if (!get_regstr(buffer, &sv))
	(void)get_regstr(stdlib, &sv);

    /* $stdlib .= ";$EMD/../../lib" */
    return get_emd_part(&sv, stdlib, ARCHNAME, "bin", Nullch);
}

static char *
win32_get_xlib(const char *pl, const char *xlib, const char *libname)
{
    dTHX;
    char regstr[40];
    char pathstr[MAX_PATH+1];
    DWORD datalen;
    int len, newsize;
    SV *sv1 = Nullsv;
    SV *sv2 = Nullsv;

    /* $HKCU{"$xlib-$]"} || $HKLM{"$xlib-$]"} . ---; */
    sprintf(regstr, "%s-%s", xlib, pl);
    (void)get_regstr(regstr, &sv1);

    /* $xlib .=
     * ";$EMD/" . ((-d $EMD/../../../$]) ? "../../.." : "../.."). "/$libname/$]/lib";  */
    sprintf(pathstr, "%s/%s/lib", libname, pl);
    (void)get_emd_part(&sv1, pathstr, ARCHNAME, "bin", pl, Nullch);

    /* $HKCU{$xlib} || $HKLM{$xlib} . ---; */
    (void)get_regstr(xlib, &sv2);

    /* $xlib .=
     * ";$EMD/" . ((-d $EMD/../../../$]) ? "../../.." : "../.."). "/$libname/lib";  */
    sprintf(pathstr, "%s/lib", libname);
    (void)get_emd_part(&sv2, pathstr, ARCHNAME, "bin", pl, Nullch);

    if (!sv1 && !sv2)
	return Nullch;
    if (!sv1)
	return SvPVX(sv2);
    if (!sv2)
	return SvPVX(sv1);

    sv_catpvn(sv1, ";", 1);
    sv_catsv(sv1, sv2);

    return SvPVX(sv1);
}

char *
win32_get_sitelib(const char *pl)
{
    return win32_get_xlib(pl, "sitelib", "site");
}

#ifndef PERL_VENDORLIB_NAME
#  define PERL_VENDORLIB_NAME	"vendor"
#endif

char *
win32_get_vendorlib(const char *pl)
{
    return win32_get_xlib(pl, "vendorlib", PERL_VENDORLIB_NAME);
}

static BOOL
has_shell_metachars(char *ptr)
{
    int inquote = 0;
    char quote = '\0';

    /*
     * Scan string looking for redirection (< or >) or pipe
     * characters (|) that are not in a quoted string.
     * Shell variable interpolation (%VAR%) can also happen inside strings.
     */
    while (*ptr) {
	switch(*ptr) {
	case '%':
	    return TRUE;
	case '\'':
	case '\"':
	    if (inquote) {
		if (quote == *ptr) {
		    inquote = 0;
		    quote = '\0';
		}
	    }
	    else {
		quote = *ptr;
		inquote++;
	    }
	    break;
	case '>':
	case '<':
	case '|':
	    if (!inquote)
		return TRUE;
	default:
	    break;
	}
	++ptr;
    }
    return FALSE;
}

#if !defined(PERL_IMPLICIT_SYS)
/* since the current process environment is being updated in util.c
 * the library functions will get the correct environment
 */
PerlIO *
Perl_my_popen(pTHX_ char *cmd, char *mode)
{
#ifdef FIXCMD
#define fixcmd(x)   {					\
			char *pspace = strchr((x),' ');	\
			if (pspace) {			\
			    char *p = (x);		\
			    while (p < pspace) {	\
				if (*p == '/')		\
				    *p = '\\';		\
				p++;			\
			    }				\
			}				\
		    }
#else
#define fixcmd(x)
#endif
    fixcmd(cmd);
    PERL_FLUSHALL_FOR_CHILD;
    return win32_popen(cmd, mode);
}

long
Perl_my_pclose(pTHX_ PerlIO *fp)
{
    return win32_pclose(fp);
}
#endif

DllExport unsigned long
win32_os_id(void)
{
    static OSVERSIONINFO osver;

    if (osver.dwPlatformId != w32_platform) {
	memset(&osver, 0, sizeof(OSVERSIONINFO));
	osver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	GetVersionEx(&osver);
	w32_platform = osver.dwPlatformId;
    }
    return (unsigned long)w32_platform;
}

DllExport int
win32_getpid(void)
{
    int pid;
#ifdef USE_ITHREADS
    dTHX;
    if (w32_pseudo_id)
	return -((int)w32_pseudo_id);
#endif
    pid = _getpid();
    /* Windows 9x appears to always reports a pid for threads and processes
     * that has the high bit set. So we treat the lower 31 bits as the
     * "real" PID for Perl's purposes. */
    if (IsWin95() && pid < 0)
	pid = -pid;
    return pid;
}

/* Tokenize a string.  Words are null-separated, and the list
 * ends with a doubled null.  Any character (except null and
 * including backslash) may be escaped by preceding it with a
 * backslash (the backslash will be stripped).
 * Returns number of words in result buffer.
 */
static long
tokenize(const char *str, char **dest, char ***destv)
{
    char *retstart = Nullch;
    char **retvstart = 0;
    int items = -1;
    if (str) {
	dTHX;
	int slen = strlen(str);
	register char *ret;
	register char **retv;
	New(1307, ret, slen+2, char);
	New(1308, retv, (slen+3)/2, char*);

	retstart = ret;
	retvstart = retv;
	*retv = ret;
	items = 0;
	while (*str) {
	    *ret = *str++;
	    if (*ret == '\\' && *str)
		*ret = *str++;
	    else if (*ret == ' ') {
		while (*str == ' ')
		    str++;
		if (ret == retstart)
		    ret--;
		else {
		    *ret = '\0';
		    ++items;
		    if (*str)
			*++retv = ret+1;
		}
	    }
	    else if (!*str)
		++items;
	    ret++;
	}
	retvstart[items] = Nullch;
	*ret++ = '\0';
	*ret = '\0';
    }
    *dest = retstart;
    *destv = retvstart;
    return items;
}

static void
get_shell(void)
{
    dTHX;
    if (!w32_perlshell_tokens) {
	/* we don't use COMSPEC here for two reasons:
	 *  1. the same reason perl on UNIX doesn't use SHELL--rampant and
	 *     uncontrolled unportability of the ensuing scripts.
	 *  2. PERL5SHELL could be set to a shell that may not be fit for
	 *     interactive use (which is what most programs look in COMSPEC
	 *     for).
	 */
	const char* defaultshell = (IsWinNT()
				    ? "cmd.exe /x/c" : "command.com /c");
	const char *usershell = PerlEnv_getenv("PERL5SHELL");
	w32_perlshell_items = tokenize(usershell ? usershell : defaultshell,
				       &w32_perlshell_tokens,
				       &w32_perlshell_vec);
    }
}

int
do_aspawn(void *vreally, void **vmark, void **vsp)
{
    dTHX;
    SV *really = (SV*)vreally;
    SV **mark = (SV**)vmark;
    SV **sp = (SV**)vsp;
    char **argv;
    char *str;
    int status;
    int flag = P_WAIT;
    int index = 0;

    if (sp <= mark)
	return -1;

    get_shell();
    New(1306, argv, (sp - mark) + w32_perlshell_items + 2, char*);

    if (SvNIOKp(*(mark+1)) && !SvPOKp(*(mark+1))) {
	++mark;
	flag = SvIVx(*mark);
    }

    while (++mark <= sp) {
	if (*mark && (str = SvPV_nolen(*mark)))
	    argv[index++] = str;
	else
	    argv[index++] = "";
    }
    argv[index++] = 0;

    status = win32_spawnvp(flag,
			   (const char*)(really ? SvPV_nolen(really) : argv[0]),
			   (const char* const*)argv);

    if (status < 0 && (errno == ENOEXEC || errno == ENOENT)) {
	/* possible shell-builtin, invoke with shell */
	int sh_items;
	sh_items = w32_perlshell_items;
	while (--index >= 0)
	    argv[index+sh_items] = argv[index];
	while (--sh_items >= 0)
	    argv[sh_items] = w32_perlshell_vec[sh_items];

	status = win32_spawnvp(flag,
			       (const char*)(really ? SvPV_nolen(really) : argv[0]),
			       (const char* const*)argv);
    }

    if (flag == P_NOWAIT) {
	if (IsWin95())
	    PL_statusvalue = -1;	/* >16bits hint for pp_system() */
    }
    else {
	if (status < 0) {
	    if (ckWARN(WARN_EXEC))
		Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't spawn \"%s\": %s", argv[0], strerror(errno));
	    status = 255 * 256;
	}
	else
	    status *= 256;
	PL_statusvalue = status;
    }
    Safefree(argv);
    return (status);
}

/* returns pointer to the next unquoted space or the end of the string */
static char*
find_next_space(const char *s)
{
    bool in_quotes = FALSE;
    while (*s) {
	/* ignore doubled backslashes, or backslash+quote */
	if (*s == '\\' && (s[1] == '\\' || s[1] == '"')) {
	    s += 2;
	}
	/* keep track of when we're within quotes */
	else if (*s == '"') {
	    s++;
	    in_quotes = !in_quotes;
	}
	/* break it up only at spaces that aren't in quotes */
	else if (!in_quotes && isSPACE(*s))
	    return (char*)s;
	else
	    s++;
    }
    return (char*)s;
}

int
do_spawn2(char *cmd, int exectype)
{
    dTHX;
    char **a;
    char *s;
    char **argv;
    int status = -1;
    BOOL needToTry = TRUE;
    char *cmd2;

    /* Save an extra exec if possible. See if there are shell
     * metacharacters in it */
    if (!has_shell_metachars(cmd)) {
	New(1301,argv, strlen(cmd) / 2 + 2, char*);
	New(1302,cmd2, strlen(cmd) + 1, char);
	strcpy(cmd2, cmd);
	a = argv;
	for (s = cmd2; *s;) {
	    while (*s && isSPACE(*s))
		s++;
	    if (*s)
		*(a++) = s;
	    s = find_next_space(s);
	    if (*s)
		*s++ = '\0';
	}
	*a = Nullch;
	if (argv[0]) {
	    switch (exectype) {
	    case EXECF_SPAWN:
		status = win32_spawnvp(P_WAIT, argv[0],
				       (const char* const*)argv);
		break;
	    case EXECF_SPAWN_NOWAIT:
		status = win32_spawnvp(P_NOWAIT, argv[0],
				       (const char* const*)argv);
		break;
	    case EXECF_EXEC:
		status = win32_execvp(argv[0], (const char* const*)argv);
		break;
	    }
	    if (status != -1 || errno == 0)
		needToTry = FALSE;
	}
	Safefree(argv);
	Safefree(cmd2);
    }
    if (needToTry) {
	char **argv;
	int i = -1;
	get_shell();
	New(1306, argv, w32_perlshell_items + 2, char*);
	while (++i < w32_perlshell_items)
	    argv[i] = w32_perlshell_vec[i];
	argv[i++] = cmd;
	argv[i] = Nullch;
	switch (exectype) {
	case EXECF_SPAWN:
	    status = win32_spawnvp(P_WAIT, argv[0],
				   (const char* const*)argv);
	    break;
	case EXECF_SPAWN_NOWAIT:
	    status = win32_spawnvp(P_NOWAIT, argv[0],
				   (const char* const*)argv);
	    break;
	case EXECF_EXEC:
	    status = win32_execvp(argv[0], (const char* const*)argv);
	    break;
	}
	cmd = argv[0];
	Safefree(argv);
    }
    if (exectype == EXECF_SPAWN_NOWAIT) {
	if (IsWin95())
	    PL_statusvalue = -1;	/* >16bits hint for pp_system() */
    }
    else {
	if (status < 0) {
	    if (ckWARN(WARN_EXEC))
		Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't %s \"%s\": %s",
		     (exectype == EXECF_EXEC ? "exec" : "spawn"),
		     cmd, strerror(errno));
	    status = 255 * 256;
	}
	else
	    status *= 256;
	PL_statusvalue = status;
    }
    return (status);
}

int
do_spawn(char *cmd)
{
    return do_spawn2(cmd, EXECF_SPAWN);
}

int
do_spawn_nowait(char *cmd)
{
    return do_spawn2(cmd, EXECF_SPAWN_NOWAIT);
}

bool
Perl_do_exec(pTHX_ char *cmd)
{
    do_spawn2(cmd, EXECF_EXEC);
    return FALSE;
}

/* The idea here is to read all the directory names into a string table
 * (separated by nulls) and when one of the other dir functions is called
 * return the pointer to the current file name.
 */
DllExport DIR *
win32_opendir(char *filename)
{
    dTHX;
    DIR			*dirp;
    long		len;
    long		idx;
    char		scanname[MAX_PATH+3];
    struct stat		sbuf;
    WIN32_FIND_DATAA	aFindData;
    WIN32_FIND_DATAW	wFindData;
    HANDLE		fh;
    char		buffer[MAX_PATH*2];
    WCHAR		wbuffer[MAX_PATH+1];
    char*		ptr;

    len = strlen(filename);
    if (len > MAX_PATH)
	return NULL;

    /* check to see if filename is a directory */
    if (win32_stat(filename, &sbuf) < 0 || !S_ISDIR(sbuf.st_mode))
	return NULL;

    /* Get us a DIR structure */
    Newz(1303, dirp, 1, DIR);

    /* Create the search pattern */
    strcpy(scanname, filename);

    /* bare drive name means look in cwd for drive */
    if (len == 2 && isALPHA(scanname[0]) && scanname[1] == ':') {
	scanname[len++] = '.';
	scanname[len++] = '/';
    }
    else if (scanname[len-1] != '/' && scanname[len-1] != '\\') {
	scanname[len++] = '/';
    }
    scanname[len++] = '*';
    scanname[len] = '\0';

    /* do the FindFirstFile call */
    if (USING_WIDE()) {
	A2WHELPER(scanname, wbuffer, sizeof(wbuffer));
	fh = FindFirstFileW(PerlDir_mapW(wbuffer), &wFindData);
    }
    else {
	fh = FindFirstFileA(PerlDir_mapA(scanname), &aFindData);
    }
    dirp->handle = fh;
    if (fh == INVALID_HANDLE_VALUE) {
	DWORD err = GetLastError();
	/* FindFirstFile() fails on empty drives! */
	switch (err) {
	case ERROR_FILE_NOT_FOUND:
	    return dirp;
	case ERROR_NO_MORE_FILES:
	case ERROR_PATH_NOT_FOUND:
	    errno = ENOENT;
	    break;
	case ERROR_NOT_ENOUGH_MEMORY:
	    errno = ENOMEM;
	    break;
	default:
	    errno = EINVAL;
	    break;
	}
	Safefree(dirp);
	return NULL;
    }

    /* now allocate the first part of the string table for
     * the filenames that we find.
     */
    if (USING_WIDE()) {
	W2AHELPER(wFindData.cFileName, buffer, sizeof(buffer));
	ptr = buffer;
    }
    else {
	ptr = aFindData.cFileName;
    }
    idx = strlen(ptr)+1;
    if (idx < 256)
	dirp->size = 128;
    else
	dirp->size = idx;
    New(1304, dirp->start, dirp->size, char);
    strcpy(dirp->start, ptr);
    dirp->nfiles++;
    dirp->end = dirp->curr = dirp->start;
    dirp->end += idx;
    return dirp;
}


/* Readdir just returns the current string pointer and bumps the
 * string pointer to the nDllExport entry.
 */
DllExport struct direct *
win32_readdir(DIR *dirp)
{
    long         len;

    if (dirp->curr) {
	/* first set up the structure to return */
	len = strlen(dirp->curr);
	strcpy(dirp->dirstr.d_name, dirp->curr);
	dirp->dirstr.d_namlen = len;

	/* Fake an inode */
	dirp->dirstr.d_ino = dirp->curr - dirp->start;

	/* Now set up for the next call to readdir */
	dirp->curr += len + 1;
	if (dirp->curr >= dirp->end) {
	    dTHX;
	    char*		ptr;
	    BOOL		res;
	    WIN32_FIND_DATAW	wFindData;
	    WIN32_FIND_DATAA	aFindData;
	    char		buffer[MAX_PATH*2];

	    /* finding the next file that matches the wildcard
	     * (which should be all of them in this directory!).
	     */
	    if (USING_WIDE()) {
		res = FindNextFileW(dirp->handle, &wFindData);
		if (res) {
		    W2AHELPER(wFindData.cFileName, buffer, sizeof(buffer));
		    ptr = buffer;
		}
	    }
	    else {
		res = FindNextFileA(dirp->handle, &aFindData);
		if (res)
		    ptr = aFindData.cFileName;
	    }
	    if (res) {
		long endpos = dirp->end - dirp->start;
		long newsize = endpos + strlen(ptr) + 1;
		/* bump the string table size by enough for the
		 * new name and its null terminator */
		while (newsize > dirp->size) {
		    long curpos = dirp->curr - dirp->start;
		    dirp->size *= 2;
		    Renew(dirp->start, dirp->size, char);
		    dirp->curr = dirp->start + curpos;
		}
		strcpy(dirp->start + endpos, ptr);
		dirp->end = dirp->start + newsize;
		dirp->nfiles++;
	    }
	    else
		dirp->curr = NULL;
	}
	return &(dirp->dirstr);
    }
    else
	return NULL;
}

/* Telldir returns the current string pointer position */
DllExport long
win32_telldir(DIR *dirp)
{
    return (dirp->curr - dirp->start);
}


/* Seekdir moves the string pointer to a previously saved position
 * (returned by telldir).
 */
DllExport void
win32_seekdir(DIR *dirp, long loc)
{
    dirp->curr = dirp->start + loc;
}

/* Rewinddir resets the string pointer to the start */
DllExport void
win32_rewinddir(DIR *dirp)
{
    dirp->curr = dirp->start;
}

/* free the memory allocated by opendir */
DllExport int
win32_closedir(DIR *dirp)
{
    dTHX;
    if (dirp->handle != INVALID_HANDLE_VALUE)
	FindClose(dirp->handle);
    Safefree(dirp->start);
    Safefree(dirp);
    return 1;
}


/*
 * various stubs
 */


/* Ownership
 *
 * Just pretend that everyone is a superuser. NT will let us know if
 * we don\'t really have permission to do something.
 */

#define ROOT_UID    ((uid_t)0)
#define ROOT_GID    ((gid_t)0)

uid_t
getuid(void)
{
    return ROOT_UID;
}

uid_t
geteuid(void)
{
    return ROOT_UID;
}

gid_t
getgid(void)
{
    return ROOT_GID;
}

gid_t
getegid(void)
{
    return ROOT_GID;
}

int
setuid(uid_t auid)
{
    return (auid == ROOT_UID ? 0 : -1);
}

int
setgid(gid_t agid)
{
    return (agid == ROOT_GID ? 0 : -1);
}

char *
getlogin(void)
{
    dTHX;
    char *buf = w32_getlogin_buffer;
    DWORD size = sizeof(w32_getlogin_buffer);
    if (GetUserName(buf,&size))
	return buf;
    return (char*)NULL;
}

int
chown(const char *path, uid_t owner, gid_t group)
{
    /* XXX noop */
    return 0;
}

/*
 * XXX this needs strengthening  (for PerlIO)
 *   -- BKS, 11-11-200
*/
int mkstemp(const char *path)
{
    dTHX;
    char buf[MAX_PATH+1];
    int i = 0, fd = -1;

retry:
    if (i++ > 10) { /* give up */
	errno = ENOENT;
	return -1;
    }
    if (!GetTempFileNameA((LPCSTR)path, "plr", 1, buf)) {
	errno = ENOENT;
	return -1;
    }
    fd = PerlLIO_open3(buf, O_CREAT|O_RDWR|O_EXCL, 0600);
    if (fd == -1)
	goto retry;
    return fd;
}

static long
find_pid(int pid)
{
    dTHX;
    long child = w32_num_children;
    while (--child >= 0) {
	if (w32_child_pids[child] == pid)
	    return child;
    }
    return -1;
}

static void
remove_dead_process(long child)
{
    if (child >= 0) {
	dTHX;
	CloseHandle(w32_child_handles[child]);
	Move(&w32_child_handles[child+1], &w32_child_handles[child],
	     (w32_num_children-child-1), HANDLE);
	Move(&w32_child_pids[child+1], &w32_child_pids[child],
	     (w32_num_children-child-1), DWORD);
	w32_num_children--;
    }
}

#ifdef USE_ITHREADS
static long
find_pseudo_pid(int pid)
{
    dTHX;
    long child = w32_num_pseudo_children;
    while (--child >= 0) {
	if (w32_pseudo_child_pids[child] == pid)
	    return child;
    }
    return -1;
}

static void
remove_dead_pseudo_process(long child)
{
    if (child >= 0) {
	dTHX;
	CloseHandle(w32_pseudo_child_handles[child]);
	Move(&w32_pseudo_child_handles[child+1], &w32_pseudo_child_handles[child],
	     (w32_num_pseudo_children-child-1), HANDLE);
	Move(&w32_pseudo_child_pids[child+1], &w32_pseudo_child_pids[child],
	     (w32_num_pseudo_children-child-1), DWORD);
	w32_num_pseudo_children--;
    }
}
#endif

DllExport int
win32_kill(int pid, int sig)
{
    dTHX;
    HANDLE hProcess;
    long child;
#ifdef USE_ITHREADS
    if (pid < 0) {
	/* it is a pseudo-forked child */
	child = find_pseudo_pid(-pid);
	if (child >= 0) {
	    hProcess = w32_pseudo_child_handles[child];
	    switch (sig) {
	    case 0:
		/* "Does process exist?" use of kill */
		return 0;
	    case 9:
                /* kill -9 style un-graceful exit */
	    	if (TerminateThread(hProcess, sig)) {
		    remove_dead_pseudo_process(child);
		    return 0;
	    	}
		break;
	    default:
	      /* We fake signals to pseudo-processes using Win32
	       * message queue.  In Win9X the pids are negative already. */
	      if (PostThreadMessage(IsWin95() ? pid : -pid,WM_USER,sig,0)) {
		    /* It might be us ... */
		    PERL_ASYNC_CHECK();
		    return 0;
		}
		break;
            }
	}
	else if (IsWin95()) {
	    pid = -pid;
	    goto alien_process;
	}
    }
    else
#endif
    {
	child = find_pid(pid);
	if (child >= 0) {
            hProcess = w32_child_handles[child];
	    switch(sig) {
	    case 0:
		/* "Does process exist?" use of kill */
		return 0;
	    case 2:
		if (GenerateConsoleCtrlEvent(CTRL_C_EVENT,pid))
		    return 0;
		break;
	    default: /* For now be backwards compatible with perl5.6 */
	    case 9:
	        if (TerminateProcess(hProcess, sig)) {
		    remove_dead_process(child);
		    return 0;
	    	}
		break;
            }
	}
	else {
alien_process:
	    hProcess = OpenProcess(PROCESS_ALL_ACCESS, TRUE,
				   (IsWin95() ? -pid : pid));
	    if (hProcess) {
		switch(sig) {
		case 0:
		    /* "Does process exist?" use of kill */
		    return 0;
		case 2:
		    if (GenerateConsoleCtrlEvent(CTRL_C_EVENT,pid))
			return 0;
		    break;
		default: /* For now be backwards compatible with perl5.6 */
                case 9:
		    if (TerminateProcess(hProcess, sig)) {
			CloseHandle(hProcess);
			return 0;
		    }
		}
	    }
	}
    }
    errno = EINVAL;
    return -1;
}

DllExport int
win32_stat(const char *path, struct stat *sbuf)
{
    dTHX;
    char	buffer[MAX_PATH+1];
    int		l = strlen(path);
    int		res;
    WCHAR	wbuffer[MAX_PATH+1];
    WCHAR*	pwbuffer;
    HANDLE      handle;
    int         nlink = 1;

    if (l > 1) {
	switch(path[l - 1]) {
	/* FindFirstFile() and stat() are buggy with a trailing
	 * backslash, so change it to a forward slash :-( */
	case '\\':
	    strncpy(buffer, path, l-1);
	    buffer[l - 1] = '/';
	    buffer[l] = '\0';
	    path = buffer;
	    break;
	/* FindFirstFile() is buggy with "x:", so add a dot :-( */
	case ':':
	    if (l == 2 && isALPHA(path[0])) {
		buffer[0] = path[0];
		buffer[1] = ':';
		buffer[2] = '.';
		buffer[3] = '\0';
		l = 3;
		path = buffer;
	    }
	    break;
	}
    }

    /* We *must* open & close the file once; otherwise file attribute changes */
    /* might not yet have propagated to "other" hard links of the same file.  */
    /* This also gives us an opportunity to determine the number of links.    */
    if (USING_WIDE()) {
	A2WHELPER(path, wbuffer, sizeof(wbuffer));
	pwbuffer = PerlDir_mapW(wbuffer);
	handle = CreateFileW(pwbuffer, 0, 0, NULL, OPEN_EXISTING, 0, NULL);
    }
    else {
	path = PerlDir_mapA(path);
	l = strlen(path);
	handle = CreateFileA(path, 0, 0, NULL, OPEN_EXISTING, 0, NULL);
    }
    if (handle != INVALID_HANDLE_VALUE) {
	BY_HANDLE_FILE_INFORMATION bhi;
	if (GetFileInformationByHandle(handle, &bhi))
	    nlink = bhi.nNumberOfLinks;
	CloseHandle(handle);
    }

    /* pwbuffer or path will be mapped correctly above */
    if (USING_WIDE()) {
	res = _wstat(pwbuffer, (struct _stat *)sbuf);
    }
    else {
	res = stat(path, sbuf);
    }
    sbuf->st_nlink = nlink;

    if (res < 0) {
	/* CRT is buggy on sharenames, so make sure it really isn't.
	 * XXX using GetFileAttributesEx() will enable us to set
	 * sbuf->st_*time (but note that's not available on the
	 * Windows of 1995) */
	DWORD r;
	if (USING_WIDE()) {
	    r = GetFileAttributesW(pwbuffer);
	}
	else {
	    r = GetFileAttributesA(path);
	}
	if (r != 0xffffffff && (r & FILE_ATTRIBUTE_DIRECTORY)) {
	    /* sbuf may still contain old garbage since stat() failed */
	    Zero(sbuf, 1, struct stat);
	    sbuf->st_mode = S_IFDIR | S_IREAD;
	    errno = 0;
	    if (!(r & FILE_ATTRIBUTE_READONLY))
		sbuf->st_mode |= S_IWRITE | S_IEXEC;
	    return 0;
	}
    }
    else {
	if (l == 3 && isALPHA(path[0]) && path[1] == ':'
	    && (path[2] == '\\' || path[2] == '/'))
	{
	    /* The drive can be inaccessible, some _stat()s are buggy */
	    if (USING_WIDE()
		? !GetVolumeInformationW(pwbuffer,NULL,0,NULL,NULL,NULL,NULL,0)
		: !GetVolumeInformationA(path,NULL,0,NULL,NULL,NULL,NULL,0)) {
		errno = ENOENT;
		return -1;
	    }
	}
#ifdef __BORLANDC__
	if (S_ISDIR(sbuf->st_mode))
	    sbuf->st_mode |= S_IWRITE | S_IEXEC;
	else if (S_ISREG(sbuf->st_mode)) {
	    int perms;
	    if (l >= 4 && path[l-4] == '.') {
		const char *e = path + l - 3;
		if (strnicmp(e,"exe",3)
		    && strnicmp(e,"bat",3)
		    && strnicmp(e,"com",3)
		    && (IsWin95() || strnicmp(e,"cmd",3)))
		    sbuf->st_mode &= ~S_IEXEC;
		else
		    sbuf->st_mode |= S_IEXEC;
	    }
	    else
		sbuf->st_mode &= ~S_IEXEC;
	    /* Propagate permissions to _group_ and _others_ */
	    perms = sbuf->st_mode & (S_IREAD|S_IWRITE|S_IEXEC);
	    sbuf->st_mode |= (perms>>3) | (perms>>6);
	}
#endif
    }
    return res;
}

#define isSLASH(c) ((c) == '/' || (c) == '\\')
#define SKIP_SLASHES(s) \
    STMT_START {				\
	while (*(s) && isSLASH(*(s)))		\
	    ++(s);				\
    } STMT_END
#define COPY_NONSLASHES(d,s) \
    STMT_START {				\
	while (*(s) && !isSLASH(*(s)))		\
	    *(d)++ = *(s)++;			\
    } STMT_END

/* Find the longname of a given path.  path is destructively modified.
 * It should have space for at least MAX_PATH characters. */
DllExport char *
win32_longpath(char *path)
{
    WIN32_FIND_DATA fdata;
    HANDLE fhand;
    char tmpbuf[MAX_PATH+1];
    char *tmpstart = tmpbuf;
    char *start = path;
    char sep;
    if (!path)
	return Nullch;

    /* drive prefix */
    if (isALPHA(path[0]) && path[1] == ':') {
	start = path + 2;
	*tmpstart++ = path[0];
	*tmpstart++ = ':';
    }
    /* UNC prefix */
    else if (isSLASH(path[0]) && isSLASH(path[1])) {
	start = path + 2;
	*tmpstart++ = path[0];
	*tmpstart++ = path[1];
	SKIP_SLASHES(start);
	COPY_NONSLASHES(tmpstart,start);	/* copy machine name */
	if (*start) {
	    *tmpstart++ = *start++;
	    SKIP_SLASHES(start);
	    COPY_NONSLASHES(tmpstart,start);	/* copy share name */
	}
    }
    *tmpstart = '\0';
    while (*start) {
	/* copy initial slash, if any */
	if (isSLASH(*start)) {
	    *tmpstart++ = *start++;
	    *tmpstart = '\0';
	    SKIP_SLASHES(start);
	}

	/* FindFirstFile() expands "." and "..", so we need to pass
	 * those through unmolested */
	if (*start == '.'
	    && (!start[1] || isSLASH(start[1])
		|| (start[1] == '.' && (!start[2] || isSLASH(start[2])))))
	{
	    COPY_NONSLASHES(tmpstart,start);	/* copy "." or ".." */
	    *tmpstart = '\0';
	    continue;
	}

	/* if this is the end, bust outta here */
	if (!*start)
	    break;

	/* now we're at a non-slash; walk up to next slash */
	while (*start && !isSLASH(*start))
	    ++start;

	/* stop and find full name of component */
	sep = *start;
	*start = '\0';
	fhand = FindFirstFile(path,&fdata);
	*start = sep;
	if (fhand != INVALID_HANDLE_VALUE) {
	    STRLEN len = strlen(fdata.cFileName);
	    if ((STRLEN)(tmpbuf + sizeof(tmpbuf) - tmpstart) > len) {
		strcpy(tmpstart, fdata.cFileName);
		tmpstart += len;
		FindClose(fhand);
	    }
	    else {
		FindClose(fhand);
		errno = ERANGE;
		return Nullch;
	    }
	}
	else {
	    /* failed a step, just return without side effects */
	    /*PerlIO_printf(Perl_debug_log, "Failed to find %s\n", path);*/
	    errno = EINVAL;
	    return Nullch;
	}
    }
    strcpy(path,tmpbuf);
    return path;
}

DllExport char *
win32_getenv(const char *name)
{
    dTHX;
    WCHAR wBuffer[MAX_PATH+1];
    DWORD needlen;
    SV *curitem = Nullsv;

    if (USING_WIDE()) {
	A2WHELPER(name, wBuffer, sizeof(wBuffer));
	needlen = GetEnvironmentVariableW(wBuffer, NULL, 0);
    }
    else
	needlen = GetEnvironmentVariableA(name,NULL,0);
    if (needlen != 0) {
	curitem = sv_2mortal(newSVpvn("", 0));
	if (USING_WIDE()) {
	    SV *acuritem;
	    do {
		SvGROW(curitem, (needlen+1)*sizeof(WCHAR));
		needlen = GetEnvironmentVariableW(wBuffer,
						  (WCHAR*)SvPVX(curitem),
						  needlen);
	    } while (needlen >= SvLEN(curitem)/sizeof(WCHAR));
	    SvCUR_set(curitem, (needlen*sizeof(WCHAR))+1);
	    acuritem = sv_2mortal(newSVsv(curitem));
	    W2AHELPER((WCHAR*)SvPVX(acuritem), SvPVX(curitem), SvCUR(curitem));
	}
	else {
	    do {
		SvGROW(curitem, needlen+1);
		needlen = GetEnvironmentVariableA(name,SvPVX(curitem),
						  needlen);
	    } while (needlen >= SvLEN(curitem));
	    SvCUR_set(curitem, needlen);
	}
    }
    else {
	/* allow any environment variables that begin with 'PERL'
	   to be stored in the registry */
	if (strncmp(name, "PERL", 4) == 0)
	    (void)get_regstr(name, &curitem);
    }
    if (curitem && SvCUR(curitem))
	return SvPVX(curitem);

    return Nullch;
}

DllExport int
win32_putenv(const char *name)
{
    dTHX;
    char* curitem;
    char* val;
    WCHAR* wCuritem;
    WCHAR* wVal;
    int length, relval = -1;

    if (name) {
	if (USING_WIDE()) {
	    length = strlen(name)+1;
	    New(1309,wCuritem,length,WCHAR);
	    A2WHELPER(name, wCuritem, length*sizeof(WCHAR));
	    wVal = wcschr(wCuritem, '=');
	    if (wVal) {
		*wVal++ = '\0';
		if (SetEnvironmentVariableW(wCuritem, *wVal ? wVal : NULL))
		    relval = 0;
	    }
	    Safefree(wCuritem);
	}
	else {
	    New(1309,curitem,strlen(name)+1,char);
	    strcpy(curitem, name);
	    val = strchr(curitem, '=');
	    if (val) {
		/* The sane way to deal with the environment.
		 * Has these advantages over putenv() & co.:
		 *  * enables us to store a truly empty value in the
		 *    environment (like in UNIX).
		 *  * we don't have to deal with RTL globals, bugs and leaks.
		 *  * Much faster.
		 * Why you may want to enable USE_WIN32_RTL_ENV:
		 *  * environ[] and RTL functions will not reflect changes,
		 *    which might be an issue if extensions want to access
		 *    the env. via RTL.  This cuts both ways, since RTL will
		 *    not see changes made by extensions that call the Win32
		 *    functions directly, either.
		 * GSAR 97-06-07
		 */
		*val++ = '\0';
		if (SetEnvironmentVariableA(curitem, *val ? val : NULL))
		    relval = 0;
	    }
	    Safefree(curitem);
	}
    }
    return relval;
}

static long
filetime_to_clock(PFILETIME ft)
{
    __int64 qw = ft->dwHighDateTime;
    qw <<= 32;
    qw |= ft->dwLowDateTime;
    qw /= 10000;  /* File time ticks at 0.1uS, clock at 1mS */
    return (long) qw;
}

DllExport int
win32_times(struct tms *timebuf)
{
    FILETIME user;
    FILETIME kernel;
    FILETIME dummy;
    clock_t process_time_so_far = clock();
    if (GetProcessTimes(GetCurrentProcess(), &dummy, &dummy,
                        &kernel,&user)) {
	timebuf->tms_utime = filetime_to_clock(&user);
	timebuf->tms_stime = filetime_to_clock(&kernel);
	timebuf->tms_cutime = 0;
	timebuf->tms_cstime = 0;
    } else {
        /* That failed - e.g. Win95 fallback to clock() */
	timebuf->tms_utime = process_time_so_far;
	timebuf->tms_stime = 0;
	timebuf->tms_cutime = 0;
	timebuf->tms_cstime = 0;
    }
    return process_time_so_far;
}

/* fix utime() so it works on directories in NT */
static BOOL
filetime_from_time(PFILETIME pFileTime, time_t Time)
{
    struct tm *pTM = localtime(&Time);
    SYSTEMTIME SystemTime;
    FILETIME LocalTime;

    if (pTM == NULL)
	return FALSE;

    SystemTime.wYear   = pTM->tm_year + 1900;
    SystemTime.wMonth  = pTM->tm_mon + 1;
    SystemTime.wDay    = pTM->tm_mday;
    SystemTime.wHour   = pTM->tm_hour;
    SystemTime.wMinute = pTM->tm_min;
    SystemTime.wSecond = pTM->tm_sec;
    SystemTime.wMilliseconds = 0;

    return SystemTimeToFileTime(&SystemTime, &LocalTime) &&
           LocalFileTimeToFileTime(&LocalTime, pFileTime);
}

DllExport int
win32_unlink(const char *filename)
{
    dTHX;
    int ret;
    DWORD attrs;

    if (USING_WIDE()) {
	WCHAR wBuffer[MAX_PATH+1];
	WCHAR* pwBuffer;

	A2WHELPER(filename, wBuffer, sizeof(wBuffer));
	pwBuffer = PerlDir_mapW(wBuffer);
	attrs = GetFileAttributesW(pwBuffer);
	if (attrs == 0xFFFFFFFF)
	    goto fail;
	if (attrs & FILE_ATTRIBUTE_READONLY) {
	    (void)SetFileAttributesW(pwBuffer, attrs & ~FILE_ATTRIBUTE_READONLY);
	    ret = _wunlink(pwBuffer);
	    if (ret == -1)
		(void)SetFileAttributesW(pwBuffer, attrs);
	}
	else
	    ret = _wunlink(pwBuffer);
    }
    else {
	filename = PerlDir_mapA(filename);
	attrs = GetFileAttributesA(filename);
	if (attrs == 0xFFFFFFFF)
	    goto fail;
	if (attrs & FILE_ATTRIBUTE_READONLY) {
	    (void)SetFileAttributesA(filename, attrs & ~FILE_ATTRIBUTE_READONLY);
	    ret = unlink(filename);
	    if (ret == -1)
		(void)SetFileAttributesA(filename, attrs);
	}
	else
	    ret = unlink(filename);
    }
    return ret;
fail:
    errno = ENOENT;
    return -1;
}

DllExport int
win32_utime(const char *filename, struct utimbuf *times)
{
    dTHX;
    HANDLE handle;
    FILETIME ftCreate;
    FILETIME ftAccess;
    FILETIME ftWrite;
    struct utimbuf TimeBuffer;
    WCHAR wbuffer[MAX_PATH+1];
    WCHAR* pwbuffer;

    int rc;
    if (USING_WIDE()) {
	A2WHELPER(filename, wbuffer, sizeof(wbuffer));
	pwbuffer = PerlDir_mapW(wbuffer);
	rc = _wutime(pwbuffer, (struct _utimbuf*)times);
    }
    else {
	filename = PerlDir_mapA(filename);
	rc = utime(filename, times);
    }
    /* EACCES: path specifies directory or readonly file */
    if (rc == 0 || errno != EACCES /* || !IsWinNT() */)
	return rc;

    if (times == NULL) {
	times = &TimeBuffer;
	time(&times->actime);
	times->modtime = times->actime;
    }

    /* This will (and should) still fail on readonly files */
    if (USING_WIDE()) {
	handle = CreateFileW(pwbuffer, GENERIC_READ | GENERIC_WRITE,
			    FILE_SHARE_READ | FILE_SHARE_DELETE, NULL,
			    OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
    }
    else {
	handle = CreateFileA(filename, GENERIC_READ | GENERIC_WRITE,
			    FILE_SHARE_READ | FILE_SHARE_DELETE, NULL,
			    OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
    }
    if (handle == INVALID_HANDLE_VALUE)
	return rc;

    if (GetFileTime(handle, &ftCreate, &ftAccess, &ftWrite) &&
	filetime_from_time(&ftAccess, times->actime) &&
	filetime_from_time(&ftWrite, times->modtime) &&
	SetFileTime(handle, &ftCreate, &ftAccess, &ftWrite))
    {
	rc = 0;
    }

    CloseHandle(handle);
    return rc;
}

DllExport int
win32_uname(struct utsname *name)
{
    struct hostent *hep;
    STRLEN nodemax = sizeof(name->nodename)-1;
    OSVERSIONINFO osver;

    memset(&osver, 0, sizeof(OSVERSIONINFO));
    osver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    if (GetVersionEx(&osver)) {
	/* sysname */
	switch (osver.dwPlatformId) {
	case VER_PLATFORM_WIN32_WINDOWS:
	    strcpy(name->sysname, "Windows");
	    break;
	case VER_PLATFORM_WIN32_NT:
	    strcpy(name->sysname, "Windows NT");
	    break;
	case VER_PLATFORM_WIN32s:
	    strcpy(name->sysname, "Win32s");
	    break;
	default:
	    strcpy(name->sysname, "Win32 Unknown");
	    break;
	}

	/* release */
	sprintf(name->release, "%d.%d",
		osver.dwMajorVersion, osver.dwMinorVersion);

	/* version */
	sprintf(name->version, "Build %d",
		osver.dwPlatformId == VER_PLATFORM_WIN32_NT
		? osver.dwBuildNumber : (osver.dwBuildNumber & 0xffff));
	if (osver.szCSDVersion[0]) {
	    char *buf = name->version + strlen(name->version);
	    sprintf(buf, " (%s)", osver.szCSDVersion);
	}
    }
    else {
	*name->sysname = '\0';
	*name->version = '\0';
	*name->release = '\0';
    }

    /* nodename */
    hep = win32_gethostbyname("localhost");
    if (hep) {
	STRLEN len = strlen(hep->h_name);
	if (len <= nodemax) {
	    strcpy(name->nodename, hep->h_name);
	}
	else {
	    strncpy(name->nodename, hep->h_name, nodemax);
	    name->nodename[nodemax] = '\0';
	}
    }
    else {
	DWORD sz = nodemax;
	if (!GetComputerName(name->nodename, &sz))
	    *name->nodename = '\0';
    }

    /* machine (architecture) */
    {
	SYSTEM_INFO info;
	char *arch;
	GetSystemInfo(&info);

#if (defined(__BORLANDC__)&&(__BORLANDC__<=0x520)) \
 || (defined(__MINGW32__) && !defined(_ANONYMOUS_UNION))
	switch (info.u.s.wProcessorArchitecture) {
#else
	switch (info.wProcessorArchitecture) {
#endif
	case PROCESSOR_ARCHITECTURE_INTEL:
	    arch = "x86"; break;
	case PROCESSOR_ARCHITECTURE_MIPS:
	    arch = "mips"; break;
	case PROCESSOR_ARCHITECTURE_ALPHA:
	    arch = "alpha"; break;
	case PROCESSOR_ARCHITECTURE_PPC:
	    arch = "ppc"; break;
	default:
	    arch = "unknown"; break;
	}
	strcpy(name->machine, arch);
    }
    return 0;
}

/* Timing related stuff */

int
do_raise(pTHX_ int sig) 
{
    if (sig < SIG_SIZE) {
	Sighandler_t handler = w32_sighandler[sig];
	if (handler == SIG_IGN) {
	    return 0;
	}
	else if (handler != SIG_DFL) {
	    (*handler)(sig);
	    return 0;
	}
	else {
	    /* Choose correct default behaviour */
	    switch (sig) {
#ifdef SIGCLD
		case SIGCLD:
#endif
#ifdef SIGCHLD
		case SIGCHLD:
#endif
		case 0:
		    return 0;
		case SIGTERM:
		default:
		    break;
	    }
	}
    }
    /* Tell caller to exit thread/process as approriate */
    return 1;
}

void
sig_terminate(pTHX_ int sig)
{
    Perl_warn(aTHX_ "Terminating on signal SIG%s(%d)\n",PL_sig_name[sig], sig);
    /* exit() seems to be safe, my_exit() or die() is a problem in ^C 
       thread 
     */
    exit(sig);
}

DllExport int
win32_async_check(pTHX)
{
    MSG msg;
    int ours = 1;
    /* Passing PeekMessage -1 as HWND (2nd arg) only get PostThreadMessage() messages
     * and ignores window messages - should co-exist better with windows apps e.g. Tk
     */
    while (PeekMessage(&msg, (HWND)-1, 0, 0, PM_REMOVE|PM_NOYIELD)) {
	int sig;
	switch(msg.message) {

#if 0
    /* Perhaps some other messages could map to signals ? ... */
        case WM_CLOSE:
        case WM_QUIT:
	    /* Treat WM_QUIT like SIGHUP?  */
	    sig = SIGHUP;
	    goto Raise;
	    break;
#endif

	/* We use WM_USER to fake kill() with other signals */
	case WM_USER: {
	    sig = msg.wParam;
	Raise:
	    if (do_raise(aTHX_ sig)) {
		   sig_terminate(aTHX_ sig);
	    }
	    break;
	}

	case WM_TIMER: {
	    /* alarm() is a one-shot but SetTimer() repeats so kill it */
	    if (w32_timerid) {
	    	KillTimer(NULL,w32_timerid);
	    	w32_timerid=0;
	    }
	    /* Now fake a call to signal handler */
	    if (do_raise(aTHX_ 14)) {
	    	sig_terminate(aTHX_ 14);
	    }
	    break;
	}

	/* Otherwise do normal Win32 thing - in case it is useful */
	default:
	    TranslateMessage(&msg);
	    DispatchMessage(&msg);
	    ours = 0;
	    break;
	}
    }
    w32_poll_count = 0;

    /* Above or other stuff may have set a signal flag */
    if (PL_sig_pending) {
	despatch_signals();
    }
    return ours;
}

DllExport DWORD
win32_msgwait(pTHX_ DWORD count, LPHANDLE handles, DWORD timeout, LPDWORD resultp)
{
    /* We may need several goes at this - so compute when we stop */
    DWORD ticks = 0;
    if (timeout != INFINITE) {
	ticks = GetTickCount();
	timeout += ticks;
    }
    while (1) {
	DWORD result = MsgWaitForMultipleObjects(count,handles,FALSE,timeout-ticks, QS_ALLEVENTS);
	if (resultp)
	   *resultp = result;
	if (result == WAIT_TIMEOUT) {
	    /* Ran out of time - explicit return of zero to avoid -ve if we
	       have scheduling issues
             */
	    return 0;
	}
	if (timeout != INFINITE) {
	    ticks = GetTickCount();
        }
	if (result == WAIT_OBJECT_0 + count) {
	    /* Message has arrived - check it */
	    if (win32_async_check(aTHX)) {
		/* was one of ours */
		break;
	    }
	}
	else {
	   /* Not timeout or message - one of handles is ready */
	   break;
	}
    }
    /* compute time left to wait */
    ticks = timeout - ticks;
    /* If we are past the end say zero */
    return (ticks > 0) ? ticks : 0;
}

int
win32_internal_wait(int *status, DWORD timeout)
{
    /* XXX this wait emulation only knows about processes
     * spawned via win32_spawnvp(P_NOWAIT, ...).
     */
    dTHX;
    int i, retval;
    DWORD exitcode, waitcode;

#ifdef USE_ITHREADS
    if (w32_num_pseudo_children) {
	win32_msgwait(aTHX_ w32_num_pseudo_children, w32_pseudo_child_handles,
		      timeout, &waitcode);
        /* Time out here if there are no other children to wait for. */
	if (waitcode == WAIT_TIMEOUT) {
	    if (!w32_num_children) {
		return 0;
	    }
	}
	else if (waitcode != WAIT_FAILED) {
	    if (waitcode >= WAIT_ABANDONED_0
		&& waitcode < WAIT_ABANDONED_0 + w32_num_pseudo_children)
		i = waitcode - WAIT_ABANDONED_0;
	    else
		i = waitcode - WAIT_OBJECT_0;
	    if (GetExitCodeThread(w32_pseudo_child_handles[i], &exitcode)) {
		*status = (int)((exitcode & 0xff) << 8);
		retval = (int)w32_pseudo_child_pids[i];
		remove_dead_pseudo_process(i);
		return -retval;
	    }
	}
    }
#endif

    if (!w32_num_children) {
	errno = ECHILD;
	return -1;
    }

    /* if a child exists, wait for it to die */
    win32_msgwait(aTHX_ w32_num_children, w32_child_handles, timeout, &waitcode);
    if (waitcode == WAIT_TIMEOUT) {
	return 0;
    }
    if (waitcode != WAIT_FAILED) {
	if (waitcode >= WAIT_ABANDONED_0
	    && waitcode < WAIT_ABANDONED_0 + w32_num_children)
	    i = waitcode - WAIT_ABANDONED_0;
	else
	    i = waitcode - WAIT_OBJECT_0;
	if (GetExitCodeProcess(w32_child_handles[i], &exitcode) ) {
	    *status = (int)((exitcode & 0xff) << 8);
	    retval = (int)w32_child_pids[i];
	    remove_dead_process(i);
	    return retval;
	}
    }

FAILED:
    errno = GetLastError();
    return -1;
}

DllExport int
win32_waitpid(int pid, int *status, int flags)
{
    dTHX;
    DWORD timeout = (flags & WNOHANG) ? 0 : INFINITE;
    int retval = -1;
    long child;
    if (pid == -1)				/* XXX threadid == 1 ? */
	return win32_internal_wait(status, timeout);
#ifdef USE_ITHREADS
    else if (pid < 0) {
	child = find_pseudo_pid(-pid);
	if (child >= 0) {
	    HANDLE hThread = w32_pseudo_child_handles[child];
	    DWORD waitcode;
	    win32_msgwait(aTHX_ 1, &hThread, timeout, &waitcode);
	    if (waitcode == WAIT_TIMEOUT) {
		return 0;
	    }
	    else if (waitcode == WAIT_OBJECT_0) {
		if (GetExitCodeThread(hThread, &waitcode)) {
		    *status = (int)((waitcode & 0xff) << 8);
		    retval = (int)w32_pseudo_child_pids[child];
		    remove_dead_pseudo_process(child);
		    return -retval;
		}
	    }
	    else
		errno = ECHILD;
	}
	else if (IsWin95()) {
	    pid = -pid;
	    goto alien_process;
	}
    }
#endif
    else {
	HANDLE hProcess;
	DWORD waitcode;
	child = find_pid(pid);
	if (child >= 0) {
	    hProcess = w32_child_handles[child];
	    win32_msgwait(aTHX_ 1, &hProcess, timeout, &waitcode);
	    if (waitcode == WAIT_TIMEOUT) {
		return 0;
	    }
	    else if (waitcode == WAIT_OBJECT_0) {
		if (GetExitCodeProcess(hProcess, &waitcode)) {
		    *status = (int)((waitcode & 0xff) << 8);
		    retval = (int)w32_child_pids[child];
		    remove_dead_process(child);
		    return retval;
		}
	    }
	    else
		errno = ECHILD;
	}
	else {
alien_process:
	    hProcess = OpenProcess(PROCESS_ALL_ACCESS, TRUE,
				   (IsWin95() ? -pid : pid));
	    if (hProcess) {
		win32_msgwait(aTHX_ 1, &hProcess, timeout, &waitcode);
		if (waitcode == WAIT_TIMEOUT) {
		    return 0;
		}
		else if (waitcode == WAIT_OBJECT_0) {
		    if (GetExitCodeProcess(hProcess, &waitcode)) {
			*status = (int)((waitcode & 0xff) << 8);
			CloseHandle(hProcess);
			return pid;
		    }
		}
		CloseHandle(hProcess);
	    }
	    else
		errno = ECHILD;
	}
    }
    return retval >= 0 ? pid : retval;
}

DllExport int
win32_wait(int *status)
{
    return win32_internal_wait(status, INFINITE);
}

DllExport unsigned int
win32_sleep(unsigned int t)
{
    dTHX;
    /* Win32 times are in ms so *1000 in and /1000 out */
    return win32_msgwait(aTHX_ 0, NULL, t*1000, NULL)/1000;
}

DllExport unsigned int
win32_alarm(unsigned int sec)
{
    /*
     * the 'obvious' implentation is SetTimer() with a callback
     * which does whatever receiving SIGALRM would do
     * we cannot use SIGALRM even via raise() as it is not
     * one of the supported codes in <signal.h>
     */
    dTHX;
    if (sec) {
	w32_timerid = SetTimer(NULL,w32_timerid,sec*1000,NULL);
    }
    else {
    	if (w32_timerid) {
            KillTimer(NULL,w32_timerid);
  	    w32_timerid=0;
    	}
    }
    return 0;
}

#ifdef HAVE_DES_FCRYPT
extern char *	des_fcrypt(const char *txt, const char *salt, char *cbuf);
#endif

DllExport char *
win32_crypt(const char *txt, const char *salt)
{
    dTHX;
#ifdef HAVE_DES_FCRYPT
    return des_fcrypt(txt, salt, w32_crypt_buffer);
#else
    Perl_croak(aTHX_ "The crypt() function is unimplemented due to excessive paranoia.");
    return Nullch;
#endif
}

#ifdef USE_FIXED_OSFHANDLE

#define FOPEN			0x01	/* file handle open */
#define FNOINHERIT		0x10	/* file handle opened O_NOINHERIT */
#define FAPPEND			0x20	/* file handle opened O_APPEND */
#define FDEV			0x40	/* file handle refers to device */
#define FTEXT			0x80	/* file handle is in text mode */

/***
*int my_open_osfhandle(long osfhandle, int flags) - open C Runtime file handle
*
*Purpose:
*       This function allocates a free C Runtime file handle and associates
*       it with the Win32 HANDLE specified by the first parameter. This is a
*	temperary fix for WIN95's brain damage GetFileType() error on socket
*	we just bypass that call for socket
*
*	This works with MSVC++ 4.0+ or GCC/Mingw32
*
*Entry:
*       long osfhandle - Win32 HANDLE to associate with C Runtime file handle.
*       int flags      - flags to associate with C Runtime file handle.
*
*Exit:
*       returns index of entry in fh, if successful
*       return -1, if no free entry is found
*
*Exceptions:
*
*******************************************************************************/

/*
 * we fake up some parts of the CRT that aren't exported by MSVCRT.dll
 * this lets sockets work on Win9X with GCC and should fix the problems
 * with perl95.exe
 *	-- BKS, 1-23-2000
*/

/* create an ioinfo entry, kill its handle, and steal the entry */

static int
_alloc_osfhnd(void)
{
    HANDLE hF = CreateFile("NUL", 0, 0, NULL, OPEN_ALWAYS, 0, NULL);
    int fh = _open_osfhandle((long)hF, 0);
    CloseHandle(hF);
    if (fh == -1)
        return fh;
    EnterCriticalSection(&(_pioinfo(fh)->lock));
    return fh;
}

static int
my_open_osfhandle(long osfhandle, int flags)
{
    int fh;
    char fileflags;		/* _osfile flags */

    /* copy relevant flags from second parameter */
    fileflags = FDEV;

    if (flags & O_APPEND)
	fileflags |= FAPPEND;

    if (flags & O_TEXT)
	fileflags |= FTEXT;

    if (flags & O_NOINHERIT)
	fileflags |= FNOINHERIT;

    /* attempt to allocate a C Runtime file handle */
    if ((fh = _alloc_osfhnd()) == -1) {
	errno = EMFILE;		/* too many open files */
	_doserrno = 0L;		/* not an OS error */
	return -1;		/* return error to caller */
    }

    /* the file is open. now, set the info in _osfhnd array */
    _set_osfhnd(fh, osfhandle);

    fileflags |= FOPEN;		/* mark as open */

    _osfile(fh) = fileflags;	/* set osfile entry */
    LeaveCriticalSection(&_pioinfo(fh)->lock);

    return fh;			/* return handle */
}

#endif	/* USE_FIXED_OSFHANDLE */

/* simulate flock by locking a range on the file */

#define LK_ERR(f,i)	((f) ? (i = 0) : (errno = GetLastError()))
#define LK_LEN		0xffff0000

DllExport int
win32_flock(int fd, int oper)
{
    OVERLAPPED o;
    int i = -1;
    HANDLE fh;

    if (!IsWinNT()) {
	dTHX;
	Perl_croak_nocontext("flock() unimplemented on this platform");
	return -1;
    }
    fh = (HANDLE)_get_osfhandle(fd);
    memset(&o, 0, sizeof(o));

    switch(oper) {
    case LOCK_SH:		/* shared lock */
	LK_ERR(LockFileEx(fh, 0, 0, LK_LEN, 0, &o),i);
	break;
    case LOCK_EX:		/* exclusive lock */
	LK_ERR(LockFileEx(fh, LOCKFILE_EXCLUSIVE_LOCK, 0, LK_LEN, 0, &o),i);
	break;
    case LOCK_SH|LOCK_NB:	/* non-blocking shared lock */
	LK_ERR(LockFileEx(fh, LOCKFILE_FAIL_IMMEDIATELY, 0, LK_LEN, 0, &o),i);
	break;
    case LOCK_EX|LOCK_NB:	/* non-blocking exclusive lock */
	LK_ERR(LockFileEx(fh,
		       LOCKFILE_EXCLUSIVE_LOCK|LOCKFILE_FAIL_IMMEDIATELY,
		       0, LK_LEN, 0, &o),i);
	break;
    case LOCK_UN:		/* unlock lock */
	LK_ERR(UnlockFileEx(fh, 0, LK_LEN, 0, &o),i);
	break;
    default:			/* unknown */
	errno = EINVAL;
	break;
    }
    return i;
}

#undef LK_ERR
#undef LK_LEN

/*
 *  redirected io subsystem for all XS modules
 *
 */

DllExport int *
win32_errno(void)
{
    return (&errno);
}

DllExport char ***
win32_environ(void)
{
    return (&(_environ));
}

/* the rest are the remapped stdio routines */
DllExport FILE *
win32_stderr(void)
{
    return (stderr);
}

DllExport FILE *
win32_stdin(void)
{
    return (stdin);
}

DllExport FILE *
win32_stdout()
{
    return (stdout);
}

DllExport int
win32_ferror(FILE *fp)
{
    return (ferror(fp));
}


DllExport int
win32_feof(FILE *fp)
{
    return (feof(fp));
}

/*
 * Since the errors returned by the socket error function
 * WSAGetLastError() are not known by the library routine strerror
 * we have to roll our own.
 */

DllExport char *
win32_strerror(int e)
{
#if !defined __BORLANDC__ && !defined __MINGW32__      /* compiler intolerance */
    extern int sys_nerr;
#endif
    DWORD source = 0;

    if (e < 0 || e > sys_nerr) {
        dTHX;
	if (e < 0)
	    e = GetLastError();

	if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, &source, e, 0,
			  w32_strerror_buffer,
			  sizeof(w32_strerror_buffer), NULL) == 0)
	    strcpy(w32_strerror_buffer, "Unknown Error");

	return w32_strerror_buffer;
    }
    return strerror(e);
}

DllExport void
win32_str_os_error(void *sv, DWORD dwErr)
{
    DWORD dwLen;
    char *sMsg;
    dwLen = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER
			  |FORMAT_MESSAGE_IGNORE_INSERTS
			  |FORMAT_MESSAGE_FROM_SYSTEM, NULL,
			   dwErr, 0, (char *)&sMsg, 1, NULL);
    /* strip trailing whitespace and period */
    if (0 < dwLen) {
	do {
	    --dwLen;	/* dwLen doesn't include trailing null */
	} while (0 < dwLen && isSPACE(sMsg[dwLen]));
	if ('.' != sMsg[dwLen])
	    dwLen++;
	sMsg[dwLen] = '\0';
    }
    if (0 == dwLen) {
	sMsg = (char*)LocalAlloc(0, 64/**sizeof(TCHAR)*/);
	if (sMsg)
	    dwLen = sprintf(sMsg,
			    "Unknown error #0x%lX (lookup 0x%lX)",
			    dwErr, GetLastError());
    }
    if (sMsg) {
	dTHX;
	sv_setpvn((SV*)sv, sMsg, dwLen);
	LocalFree(sMsg);
    }
}

DllExport int
win32_fprintf(FILE *fp, const char *format, ...)
{
    va_list marker;
    va_start(marker, format);     /* Initialize variable arguments. */

    return (vfprintf(fp, format, marker));
}

DllExport int
win32_printf(const char *format, ...)
{
    va_list marker;
    va_start(marker, format);     /* Initialize variable arguments. */

    return (vprintf(format, marker));
}

DllExport int
win32_vfprintf(FILE *fp, const char *format, va_list args)
{
    return (vfprintf(fp, format, args));
}

DllExport int
win32_vprintf(const char *format, va_list args)
{
    return (vprintf(format, args));
}

DllExport size_t
win32_fread(void *buf, size_t size, size_t count, FILE *fp)
{
    return fread(buf, size, count, fp);
}

DllExport size_t
win32_fwrite(const void *buf, size_t size, size_t count, FILE *fp)
{
    return fwrite(buf, size, count, fp);
}

#define MODE_SIZE 10

DllExport FILE *
win32_fopen(const char *filename, const char *mode)
{
    dTHX;
    WCHAR wMode[MODE_SIZE], wBuffer[MAX_PATH+1];
    FILE *f;

    if (!*filename)
	return NULL;

    if (stricmp(filename, "/dev/null")==0)
	filename = "NUL";

    if (USING_WIDE()) {
	A2WHELPER(mode, wMode, sizeof(wMode));
	A2WHELPER(filename, wBuffer, sizeof(wBuffer));
	f = _wfopen(PerlDir_mapW(wBuffer), wMode);
    }
    else
	f = fopen(PerlDir_mapA(filename), mode);
    /* avoid buffering headaches for child processes */
    if (f && *mode == 'a')
	win32_fseek(f, 0, SEEK_END);
    return f;
}

#ifndef USE_SOCKETS_AS_HANDLES
#undef fdopen
#define fdopen my_fdopen
#endif

DllExport FILE *
win32_fdopen(int handle, const char *mode)
{
    dTHX;
    WCHAR wMode[MODE_SIZE];
    FILE *f;
    if (USING_WIDE()) {
	A2WHELPER(mode, wMode, sizeof(wMode));
	f = _wfdopen(handle, wMode);
    }
    else
	f = fdopen(handle, (char *) mode);
    /* avoid buffering headaches for child processes */
    if (f && *mode == 'a')
	win32_fseek(f, 0, SEEK_END);
    return f;
}

DllExport FILE *
win32_freopen(const char *path, const char *mode, FILE *stream)
{
    dTHX;
    WCHAR wMode[MODE_SIZE], wBuffer[MAX_PATH+1];
    if (stricmp(path, "/dev/null")==0)
	path = "NUL";

    if (USING_WIDE()) {
	A2WHELPER(mode, wMode, sizeof(wMode));
	A2WHELPER(path, wBuffer, sizeof(wBuffer));
	return _wfreopen(PerlDir_mapW(wBuffer), wMode, stream);
    }
    return freopen(PerlDir_mapA(path), mode, stream);
}

DllExport int
win32_fclose(FILE *pf)
{
    return my_fclose(pf);	/* defined in win32sck.c */
}

DllExport int
win32_fputs(const char *s,FILE *pf)
{
    return fputs(s, pf);
}

DllExport int
win32_fputc(int c,FILE *pf)
{
    return fputc(c,pf);
}

DllExport int
win32_ungetc(int c,FILE *pf)
{
    return ungetc(c,pf);
}

DllExport int
win32_getc(FILE *pf)
{
    return getc(pf);
}

DllExport int
win32_fileno(FILE *pf)
{
    return fileno(pf);
}

DllExport void
win32_clearerr(FILE *pf)
{
    clearerr(pf);
    return;
}

DllExport int
win32_fflush(FILE *pf)
{
    return fflush(pf);
}

DllExport long
win32_ftell(FILE *pf)
{
    return ftell(pf);
}

DllExport int
win32_fseek(FILE *pf,long offset,int origin)
{
    return fseek(pf, offset, origin);
}

DllExport int
win32_fgetpos(FILE *pf,fpos_t *p)
{
    return fgetpos(pf, p);
}

DllExport int
win32_fsetpos(FILE *pf,const fpos_t *p)
{
    return fsetpos(pf, p);
}

DllExport void
win32_rewind(FILE *pf)
{
    rewind(pf);
    return;
}

DllExport FILE*
win32_tmpfile(void)
{
    dTHX;
    char prefix[MAX_PATH+1];
    char filename[MAX_PATH+1];
    DWORD len = GetTempPath(MAX_PATH, prefix);
    if (len && len < MAX_PATH) {
	if (GetTempFileName(prefix, "plx", 0, filename)) {
	    HANDLE fh = CreateFile(filename,
				   DELETE | GENERIC_READ | GENERIC_WRITE,
				   0,
				   NULL,
				   CREATE_ALWAYS,
				   FILE_ATTRIBUTE_NORMAL
				   | FILE_FLAG_DELETE_ON_CLOSE,
				   NULL);
	    if (fh != INVALID_HANDLE_VALUE) {
		int fd = win32_open_osfhandle((long)fh, 0);
		if (fd >= 0) {
#if defined(__BORLANDC__)
        	    setmode(fd,O_BINARY);
#endif
		    DEBUG_p(PerlIO_printf(Perl_debug_log,
					  "Created tmpfile=%s\n",filename));
		    return fdopen(fd, "w+b");
		}
	    }
	}
    }
    return NULL;
}

DllExport void
win32_abort(void)
{
    abort();
    return;
}

DllExport int
win32_fstat(int fd,struct stat *sbufptr)
{
#ifdef __BORLANDC__
    /* A file designated by filehandle is not shown as accessible
     * for write operations, probably because it is opened for reading.
     * --Vadim Konovalov
     */
    int rc = fstat(fd,sbufptr);
    BY_HANDLE_FILE_INFORMATION bhfi;
    if (GetFileInformationByHandle((HANDLE)_get_osfhandle(fd), &bhfi)) {
        sbufptr->st_mode &= 0xFE00;
        if (bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
            sbufptr->st_mode |= (S_IREAD + (S_IREAD >> 3) + (S_IREAD >> 6));
        else
            sbufptr->st_mode |= ((S_IREAD|S_IWRITE) + ((S_IREAD|S_IWRITE) >> 3)
              + ((S_IREAD|S_IWRITE) >> 6));
    }
    return rc;
#else
    return my_fstat(fd,sbufptr);
#endif
}

DllExport int
win32_pipe(int *pfd, unsigned int size, int mode)
{
    return _pipe(pfd, size, mode);
}

DllExport PerlIO*
win32_popenlist(const char *mode, IV narg, SV **args)
{
 dTHX;
 Perl_croak(aTHX_ "List form of pipe open not implemented");
 return NULL;
}

/*
 * a popen() clone that respects PERL5SHELL
 *
 * changed to return PerlIO* rather than FILE * by BKS, 11-11-2000
 */

DllExport PerlIO*
win32_popen(const char *command, const char *mode)
{
#ifdef USE_RTL_POPEN
    return _popen(command, mode);
#else
    int p[2];
    int parent, child;
    int stdfd, oldfd;
    int ourmode;
    int childpid;

    /* establish which ends read and write */
    if (strchr(mode,'w')) {
        stdfd = 0;		/* stdin */
        parent = 1;
        child = 0;
    }
    else if (strchr(mode,'r')) {
        stdfd = 1;		/* stdout */
        parent = 0;
        child = 1;
    }
    else
        return NULL;

    /* set the correct mode */
    if (strchr(mode,'b'))
        ourmode = O_BINARY;
    else if (strchr(mode,'t'))
        ourmode = O_TEXT;
    else
        ourmode = _fmode & (O_TEXT | O_BINARY);

    /* the child doesn't inherit handles */
    ourmode |= O_NOINHERIT;

    if (win32_pipe( p, 512, ourmode) == -1)
        return NULL;

    /* save current stdfd */
    if ((oldfd = win32_dup(stdfd)) == -1)
        goto cleanup;

    /* make stdfd go to child end of pipe (implicitly closes stdfd) */
    /* stdfd will be inherited by the child */
    if (win32_dup2(p[child], stdfd) == -1)
        goto cleanup;

    /* close the child end in parent */
    win32_close(p[child]);

    /* start the child */
    {
	dTHX;
	if ((childpid = do_spawn_nowait((char*)command)) == -1)
	    goto cleanup;

	/* revert stdfd to whatever it was before */
	if (win32_dup2(oldfd, stdfd) == -1)
	    goto cleanup;

	/* close saved handle */
	win32_close(oldfd);

	LOCK_FDPID_MUTEX;
	sv_setiv(*av_fetch(w32_fdpid, p[parent], TRUE), childpid);
	UNLOCK_FDPID_MUTEX;

	/* set process id so that it can be returned by perl's open() */
	PL_forkprocess = childpid;
    }

    /* we have an fd, return a file stream */
    return (PerlIO_fdopen(p[parent], (char *)mode));

cleanup:
    /* we don't need to check for errors here */
    win32_close(p[0]);
    win32_close(p[1]);
    if (oldfd != -1) {
        win32_dup2(oldfd, stdfd);
        win32_close(oldfd);
    }
    return (NULL);

#endif /* USE_RTL_POPEN */
}

/*
 * pclose() clone
 */

DllExport int
win32_pclose(PerlIO *pf)
{
#ifdef USE_RTL_POPEN
    return _pclose(pf);
#else
    dTHX;
    int childpid, status;
    SV *sv;

    LOCK_FDPID_MUTEX;
    sv = *av_fetch(w32_fdpid, PerlIO_fileno(pf), TRUE);

    if (SvIOK(sv))
	childpid = SvIVX(sv);
    else
	childpid = 0;

    if (!childpid) {
	errno = EBADF;
        return -1;
    }

#ifdef USE_PERLIO
    PerlIO_close(pf);
#else
    fclose(pf);
#endif
    SvIVX(sv) = 0;
    UNLOCK_FDPID_MUTEX;

    if (win32_waitpid(childpid, &status, 0) == -1)
        return -1;

    return status;

#endif /* USE_RTL_POPEN */
}

static BOOL WINAPI
Nt4CreateHardLinkW(
    LPCWSTR lpFileName,
    LPCWSTR lpExistingFileName,
    LPSECURITY_ATTRIBUTES lpSecurityAttributes)
{
    HANDLE handle;
    WCHAR wFullName[MAX_PATH+1];
    LPVOID lpContext = NULL;
    WIN32_STREAM_ID StreamId;
    DWORD dwSize = (char*)&StreamId.cStreamName - (char*)&StreamId;
    DWORD dwWritten;
    DWORD dwLen;
    BOOL bSuccess;

    BOOL (__stdcall *pfnBackupWrite)(HANDLE, LPBYTE, DWORD, LPDWORD,
				     BOOL, BOOL, LPVOID*) =
	(BOOL (__stdcall *)(HANDLE, LPBYTE, DWORD, LPDWORD,
			    BOOL, BOOL, LPVOID*))
	GetProcAddress(GetModuleHandle("kernel32.dll"), "BackupWrite");
    if (pfnBackupWrite == NULL)
	return 0;

    dwLen = GetFullPathNameW(lpFileName, MAX_PATH, wFullName, NULL);
    if (dwLen == 0)
	return 0;
    dwLen = (dwLen+1)*sizeof(WCHAR);

    handle = CreateFileW(lpExistingFileName, FILE_WRITE_ATTRIBUTES,
			 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
			 NULL, OPEN_EXISTING, 0, NULL);
    if (handle == INVALID_HANDLE_VALUE)
	return 0;

    StreamId.dwStreamId = BACKUP_LINK;
    StreamId.dwStreamAttributes = 0;
    StreamId.dwStreamNameSize = 0;
#if defined(__BORLANDC__) \
 ||(defined(__MINGW32__) && !defined(_ANONYMOUS_UNION))
    StreamId.Size.u.HighPart = 0;
    StreamId.Size.u.LowPart = dwLen;
#else
    StreamId.Size.HighPart = 0;
    StreamId.Size.LowPart = dwLen;
#endif

    bSuccess = pfnBackupWrite(handle, (LPBYTE)&StreamId, dwSize, &dwWritten,
			      FALSE, FALSE, &lpContext);
    if (bSuccess) {
	bSuccess = pfnBackupWrite(handle, (LPBYTE)wFullName, dwLen, &dwWritten,
				  FALSE, FALSE, &lpContext);
	pfnBackupWrite(handle, NULL, 0, &dwWritten, TRUE, FALSE, &lpContext);
    }

    CloseHandle(handle);
    return bSuccess;
}

DllExport int
win32_link(const char *oldname, const char *newname)
{
    dTHX;
    BOOL (__stdcall *pfnCreateHardLinkW)(LPCWSTR,LPCWSTR,LPSECURITY_ATTRIBUTES);
    WCHAR wOldName[MAX_PATH+1];
    WCHAR wNewName[MAX_PATH+1];

    if (IsWin95())
	Perl_croak(aTHX_ PL_no_func, "link");

    pfnCreateHardLinkW =
	(BOOL (__stdcall *)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES))
	GetProcAddress(GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
    if (pfnCreateHardLinkW == NULL)
	pfnCreateHardLinkW = Nt4CreateHardLinkW;

    if ((A2WHELPER(oldname, wOldName, sizeof(wOldName))) &&
	(A2WHELPER(newname, wNewName, sizeof(wNewName))) &&
	(wcscpy(wOldName, PerlDir_mapW(wOldName)),
	pfnCreateHardLinkW(PerlDir_mapW(wNewName), wOldName, NULL)))
    {
	return 0;
    }
    errno = (GetLastError() == ERROR_FILE_NOT_FOUND) ? ENOENT : EINVAL;
    return -1;
}

DllExport int
win32_rename(const char *oname, const char *newname)
{
    WCHAR wOldName[MAX_PATH+1];
    WCHAR wNewName[MAX_PATH+1];
    char szOldName[MAX_PATH+1];
    char szNewName[MAX_PATH+1];
    BOOL bResult;
    dTHX;

    /* XXX despite what the documentation says about MoveFileEx(),
     * it doesn't work under Windows95!
     */
    if (IsWinNT()) {
	DWORD dwFlags = MOVEFILE_COPY_ALLOWED;
	if (USING_WIDE()) {
	    A2WHELPER(oname, wOldName, sizeof(wOldName));
	    A2WHELPER(newname, wNewName, sizeof(wNewName));
	    if (wcsicmp(wNewName, wOldName))
		dwFlags |= MOVEFILE_REPLACE_EXISTING;
	    wcscpy(wOldName, PerlDir_mapW(wOldName));
	    bResult = MoveFileExW(wOldName,PerlDir_mapW(wNewName), dwFlags);
	}
	else {
	    if (stricmp(newname, oname))
		dwFlags |= MOVEFILE_REPLACE_EXISTING;
	    strcpy(szOldName, PerlDir_mapA(oname));
	    bResult = MoveFileExA(szOldName,PerlDir_mapA(newname), dwFlags);
	}
	if (!bResult) {
	    DWORD err = GetLastError();
	    switch (err) {
	    case ERROR_BAD_NET_NAME:
	    case ERROR_BAD_NETPATH:
	    case ERROR_BAD_PATHNAME:
	    case ERROR_FILE_NOT_FOUND:
	    case ERROR_FILENAME_EXCED_RANGE:
	    case ERROR_INVALID_DRIVE:
	    case ERROR_NO_MORE_FILES:
	    case ERROR_PATH_NOT_FOUND:
		errno = ENOENT;
		break;
	    default:
		errno = EACCES;
		break;
	    }
	    return -1;
	}
	return 0;
    }
    else {
	int retval = 0;
	char szTmpName[MAX_PATH+1];
	char dname[MAX_PATH+1];
	char *endname = Nullch;
	STRLEN tmplen = 0;
	DWORD from_attr, to_attr;

	strcpy(szOldName, PerlDir_mapA(oname));
	strcpy(szNewName, PerlDir_mapA(newname));

	/* if oname doesn't exist, do nothing */
	from_attr = GetFileAttributes(szOldName);
	if (from_attr == 0xFFFFFFFF) {
	    errno = ENOENT;
	    return -1;
	}

	/* if newname exists, rename it to a temporary name so that we
	 * don't delete it in case oname happens to be the same file
	 * (but perhaps accessed via a different path)
	 */
	to_attr = GetFileAttributes(szNewName);
	if (to_attr != 0xFFFFFFFF) {
	    /* if newname is a directory, we fail
	     * XXX could overcome this with yet more convoluted logic */
	    if (to_attr & FILE_ATTRIBUTE_DIRECTORY) {
		errno = EACCES;
		return -1;
	    }
	    tmplen = strlen(szNewName);
	    strcpy(szTmpName,szNewName);
	    endname = szTmpName+tmplen;
	    for (; endname > szTmpName ; --endname) {
		if (*endname == '/' || *endname == '\\') {
		    *endname = '\0';
		    break;
		}
	    }
	    if (endname > szTmpName)
		endname = strcpy(dname,szTmpName);
	    else
		endname = ".";

	    /* get a temporary filename in same directory
	     * XXX is this really the best we can do? */
	    if (!GetTempFileName((LPCTSTR)endname, "plr", 0, szTmpName)) {
		errno = ENOENT;
		return -1;
	    }
	    DeleteFile(szTmpName);

	    retval = rename(szNewName, szTmpName);
	    if (retval != 0) {
		errno = EACCES;
		return retval;
	    }
	}

	/* rename oname to newname */
	retval = rename(szOldName, szNewName);

	/* if we created a temporary file before ... */
	if (endname != Nullch) {
	    /* ...and rename succeeded, delete temporary file/directory */
	    if (retval == 0)
		DeleteFile(szTmpName);
	    /* else restore it to what it was */
	    else
		(void)rename(szTmpName, szNewName);
	}
	return retval;
    }
}

DllExport int
win32_setmode(int fd, int mode)
{
    return setmode(fd, mode);
}

DllExport long
win32_lseek(int fd, long offset, int origin)
{
    return lseek(fd, offset, origin);
}

DllExport long
win32_tell(int fd)
{
    return tell(fd);
}

DllExport int
win32_open(const char *path, int flag, ...)
{
    dTHX;
    va_list ap;
    int pmode;
    WCHAR wBuffer[MAX_PATH+1];

    va_start(ap, flag);
    pmode = va_arg(ap, int);
    va_end(ap);

    if (stricmp(path, "/dev/null")==0)
	path = "NUL";

    if (USING_WIDE()) {
	A2WHELPER(path, wBuffer, sizeof(wBuffer));
	return _wopen(PerlDir_mapW(wBuffer), flag, pmode);
    }
    return open(PerlDir_mapA(path), flag, pmode);
}

/* close() that understands socket */
extern int my_close(int);	/* in win32sck.c */

DllExport int
win32_close(int fd)
{
    return my_close(fd);
}

DllExport int
win32_eof(int fd)
{
    return eof(fd);
}

DllExport int
win32_dup(int fd)
{
    return dup(fd);
}

DllExport int
win32_dup2(int fd1,int fd2)
{
    return dup2(fd1,fd2);
}

#ifdef PERL_MSVCRT_READFIX

#define LF		10	/* line feed */
#define CR		13	/* carriage return */
#define CTRLZ		26      /* ctrl-z means eof for text */
#define FOPEN		0x01	/* file handle open */
#define FEOFLAG		0x02	/* end of file has been encountered */
#define FCRLF		0x04	/* CR-LF across read buffer (in text mode) */
#define FPIPE		0x08	/* file handle refers to a pipe */
#define FAPPEND		0x20	/* file handle opened O_APPEND */
#define FDEV		0x40	/* file handle refers to device */
#define FTEXT		0x80	/* file handle is in text mode */
#define MAX_DESCRIPTOR_COUNT	(64*32) /* this is the maximun that MSVCRT can handle */

int __cdecl
_fixed_read(int fh, void *buf, unsigned cnt)
{
    int bytes_read;                 /* number of bytes read */
    char *buffer;                   /* buffer to read to */
    int os_read;                    /* bytes read on OS call */
    char *p, *q;                    /* pointers into buffer */
    char peekchr;                   /* peek-ahead character */
    ULONG filepos;                  /* file position after seek */
    ULONG dosretval;                /* o.s. return value */

    /* validate handle */
    if (((unsigned)fh >= (unsigned)MAX_DESCRIPTOR_COUNT) ||
         !(_osfile(fh) & FOPEN))
    {
	/* out of range -- return error */
	errno = EBADF;
	_doserrno = 0;  /* not o.s. error */
	return -1;
    }

    /*
     * If lockinitflag is FALSE, assume fd is device
     * lockinitflag is set to TRUE by open.
     */
    if (_pioinfo(fh)->lockinitflag)
	EnterCriticalSection(&(_pioinfo(fh)->lock));  /* lock file */

    bytes_read = 0;                 /* nothing read yet */
    buffer = (char*)buf;

    if (cnt == 0 || (_osfile(fh) & FEOFLAG)) {
        /* nothing to read or at EOF, so return 0 read */
        goto functionexit;
    }

    if ((_osfile(fh) & (FPIPE|FDEV)) && _pipech(fh) != LF) {
        /* a pipe/device and pipe lookahead non-empty: read the lookahead
         * char */
        *buffer++ = _pipech(fh);
        ++bytes_read;
        --cnt;
        _pipech(fh) = LF;           /* mark as empty */
    }

    /* read the data */

    if (!ReadFile((HANDLE)_osfhnd(fh), buffer, cnt, (LPDWORD)&os_read, NULL))
    {
        /* ReadFile has reported an error. recognize two special cases.
         *
         *      1. map ERROR_ACCESS_DENIED to EBADF
         *
         *      2. just return 0 if ERROR_BROKEN_PIPE has occurred. it
         *         means the handle is a read-handle on a pipe for which
         *         all write-handles have been closed and all data has been
         *         read. */

        if ((dosretval = GetLastError()) == ERROR_ACCESS_DENIED) {
            /* wrong read/write mode should return EBADF, not EACCES */
            errno = EBADF;
            _doserrno = dosretval;
            bytes_read = -1;
	    goto functionexit;
        }
        else if (dosretval == ERROR_BROKEN_PIPE) {
            bytes_read = 0;
	    goto functionexit;
        }
        else {
            bytes_read = -1;
	    goto functionexit;
        }
    }

    bytes_read += os_read;          /* update bytes read */

    if (_osfile(fh) & FTEXT) {
        /* now must translate CR-LFs to LFs in the buffer */

        /* set CRLF flag to indicate LF at beginning of buffer */
        /* if ((os_read != 0) && (*(char *)buf == LF))   */
        /*    _osfile(fh) |= FCRLF;                      */
        /* else                                          */
        /*    _osfile(fh) &= ~FCRLF;                     */

        _osfile(fh) &= ~FCRLF;

        /* convert chars in the buffer: p is src, q is dest */
        p = q = (char*)buf;
        while (p < (char *)buf + bytes_read) {
            if (*p == CTRLZ) {
                /* if fh is not a device, set ctrl-z flag */
                if (!(_osfile(fh) & FDEV))
                    _osfile(fh) |= FEOFLAG;
                break;              /* stop translating */
            }
            else if (*p != CR)
                *q++ = *p++;
            else {
                /* *p is CR, so must check next char for LF */
                if (p < (char *)buf + bytes_read - 1) {
                    if (*(p+1) == LF) {
                        p += 2;
                        *q++ = LF;  /* convert CR-LF to LF */
                    }
                    else
                        *q++ = *p++;    /* store char normally */
                }
                else {
                    /* This is the hard part.  We found a CR at end of
                       buffer.  We must peek ahead to see if next char
                       is an LF. */
                    ++p;

                    dosretval = 0;
                    if (!ReadFile((HANDLE)_osfhnd(fh), &peekchr, 1,
                                    (LPDWORD)&os_read, NULL))
                        dosretval = GetLastError();

                    if (dosretval != 0 || os_read == 0) {
                        /* couldn't read ahead, store CR */
                        *q++ = CR;
                    }
                    else {
                        /* peekchr now has the extra character -- we now
                           have several possibilities:
                           1. disk file and char is not LF; just seek back
                              and copy CR
                           2. disk file and char is LF; store LF, don't seek back
                           3. pipe/device and char is LF; store LF.
                           4. pipe/device and char isn't LF, store CR and
                              put char in pipe lookahead buffer. */
                        if (_osfile(fh) & (FDEV|FPIPE)) {
                            /* non-seekable device */
                            if (peekchr == LF)
                                *q++ = LF;
                            else {
                                *q++ = CR;
                                _pipech(fh) = peekchr;
                            }
                        }
                        else {
                            /* disk file */
                            if (peekchr == LF) {
                                /* nothing read yet; must make some
                                   progress */
                                *q++ = LF;
                                /* turn on this flag for tell routine */
                                _osfile(fh) |= FCRLF;
                            }
                            else {
				HANDLE osHandle;        /* o.s. handle value */
                                /* seek back */
				if ((osHandle = (HANDLE)_get_osfhandle(fh)) != (HANDLE)-1)
				{
				    if ((filepos = SetFilePointer(osHandle, -1, NULL, FILE_CURRENT)) == -1)
					dosretval = GetLastError();
				}
                                if (peekchr != LF)
                                    *q++ = CR;
                            }
                        }
                    }
                }
            }
        }

        /* we now change bytes_read to reflect the true number of chars
           in the buffer */
        bytes_read = q - (char *)buf;
    }

functionexit:
    if (_pioinfo(fh)->lockinitflag)
	LeaveCriticalSection(&(_pioinfo(fh)->lock));    /* unlock file */

    return bytes_read;
}

#endif	/* PERL_MSVCRT_READFIX */

DllExport int
win32_read(int fd, void *buf, unsigned int cnt)
{
#ifdef PERL_MSVCRT_READFIX
    return _fixed_read(fd, buf, cnt);
#else
    return read(fd, buf, cnt);
#endif
}

DllExport int
win32_write(int fd, const void *buf, unsigned int cnt)
{
    return write(fd, buf, cnt);
}

DllExport int
win32_mkdir(const char *dir, int mode)
{
    dTHX;
    if (USING_WIDE()) {
	WCHAR wBuffer[MAX_PATH+1];
	A2WHELPER(dir, wBuffer, sizeof(wBuffer));
	return _wmkdir(PerlDir_mapW(wBuffer));
    }
    return mkdir(PerlDir_mapA(dir)); /* just ignore mode */
}

DllExport int
win32_rmdir(const char *dir)
{
    dTHX;
    if (USING_WIDE()) {
	WCHAR wBuffer[MAX_PATH+1];
	A2WHELPER(dir, wBuffer, sizeof(wBuffer));
	return _wrmdir(PerlDir_mapW(wBuffer));
    }
    return rmdir(PerlDir_mapA(dir));
}

DllExport int
win32_chdir(const char *dir)
{
    dTHX;
    if (!dir) {
	errno = ENOENT;
	return -1;
    }
    if (USING_WIDE()) {
	WCHAR wBuffer[MAX_PATH+1];
	A2WHELPER(dir, wBuffer, sizeof(wBuffer));
	return _wchdir(wBuffer);
    }
    return chdir(dir);
}

DllExport  int
win32_access(const char *path, int mode)
{
    dTHX;
    if (USING_WIDE()) {
	WCHAR wBuffer[MAX_PATH+1];
	A2WHELPER(path, wBuffer, sizeof(wBuffer));
	return _waccess(PerlDir_mapW(wBuffer), mode);
    }
    return access(PerlDir_mapA(path), mode);
}

DllExport  int
win32_chmod(const char *path, int mode)
{
    dTHX;
    if (USING_WIDE()) {
	WCHAR wBuffer[MAX_PATH+1];
	A2WHELPER(path, wBuffer, sizeof(wBuffer));
	return _wchmod(PerlDir_mapW(wBuffer), mode);
    }
    return chmod(PerlDir_mapA(path), mode);
}


static char *
create_command_line(char *cname, STRLEN clen, const char * const *args)
{
    dTHX;
    int index, argc;
    char *cmd, *ptr;
    const char *arg;
    STRLEN len = 0;
    bool bat_file = FALSE;
    bool cmd_shell = FALSE;
    bool dumb_shell = FALSE;
    bool extra_quotes = FALSE;
    bool quote_next = FALSE;

    if (!cname)
	cname = (char*)args[0];

    /* The NT cmd.exe shell has the following peculiarity that needs to be
     * worked around.  It strips a leading and trailing dquote when any
     * of the following is true:
     *    1. the /S switch was used
     *    2. there are more than two dquotes
     *    3. there is a special character from this set: &<>()@^|
     *    4. no whitespace characters within the two dquotes
     *    5. string between two dquotes isn't an executable file
     * To work around this, we always add a leading and trailing dquote
     * to the string, if the first argument is either "cmd.exe" or "cmd",
     * and there were at least two or more arguments passed to cmd.exe
     * (not including switches).
     * XXX the above rules (from "cmd /?") don't seem to be applied
     * always, making for the convolutions below :-(
     */
    if (cname) {
	if (!clen)
	    clen = strlen(cname);

	if (clen > 4
	    && (stricmp(&cname[clen-4], ".bat") == 0
		|| (IsWinNT() && stricmp(&cname[clen-4], ".cmd") == 0)))
	{
	    bat_file = TRUE;
	    len += 3;
	}
	else {
	    char *exe = strrchr(cname, '/');
	    char *exe2 = strrchr(cname, '\\');
	    if (exe2 > exe)
		exe = exe2;
	    if (exe)
		++exe;
	    else
		exe = cname;
	    if (stricmp(exe, "cmd.exe") == 0 || stricmp(exe, "cmd") == 0) {
		cmd_shell = TRUE;
		len += 3;
	    }
	    else if (stricmp(exe, "command.com") == 0
		     || stricmp(exe, "command") == 0)
	    {
		dumb_shell = TRUE;
	    }
	}
    }

    DEBUG_p(PerlIO_printf(Perl_debug_log, "Args "));
    for (index = 0; (arg = (char*)args[index]) != NULL; ++index) {
	STRLEN curlen = strlen(arg);
	if (!(arg[0] == '"' && arg[curlen-1] == '"'))
	    len += 2;	/* assume quoting needed (worst case) */
	len += curlen + 1;
	DEBUG_p(PerlIO_printf(Perl_debug_log, "[%s]",arg));
    }
    DEBUG_p(PerlIO_printf(Perl_debug_log, "\n"));

    argc = index;
    New(1310, cmd, len, char);
    ptr = cmd;

    if (bat_file) {
	*ptr++ = '"';
	extra_quotes = TRUE;
    }

    for (index = 0; (arg = (char*)args[index]) != NULL; ++index) {
	bool do_quote = 0;
	STRLEN curlen = strlen(arg);

	/* we want to protect empty arguments and ones with spaces with
	 * dquotes, but only if they aren't already there */
	if (!dumb_shell) {
	    if (!curlen) {
		do_quote = 1;
	    }
	    else if (quote_next) {
		/* see if it really is multiple arguments pretending to
		 * be one and force a set of quotes around it */
		if (*find_next_space(arg))
		    do_quote = 1;
	    }
	    else if (!(arg[0] == '"' && curlen > 1 && arg[curlen-1] == '"')) {
		STRLEN i = 0;
		while (i < curlen) {
		    if (isSPACE(arg[i])) {
			do_quote = 1;
		    }
		    else if (arg[i] == '"') {
			do_quote = 0;
			break;
		    }
		    i++;
		}
	    }
	}

	if (do_quote)
	    *ptr++ = '"';

	strcpy(ptr, arg);
	ptr += curlen;

	if (do_quote)
	    *ptr++ = '"';

	if (args[index+1])
	    *ptr++ = ' ';

    	if (!extra_quotes
	    && cmd_shell
	    && (stricmp(arg, "/x/c") == 0 || stricmp(arg, "/c") == 0))
	{
	    /* is there a next argument? */
	    if (args[index+1]) {
		/* are there two or more next arguments? */
		if (args[index+2]) {
		    *ptr++ = '"';
		    extra_quotes = TRUE;
		}
		else {
		    /* single argument, force quoting if it has spaces */
		    quote_next = TRUE;
		}
	    }
	}
    }

    if (extra_quotes)
	*ptr++ = '"';

    *ptr = '\0';

    return cmd;
}

static char *
qualified_path(const char *cmd)
{
    dTHX;
    char *pathstr;
    char *fullcmd, *curfullcmd;
    STRLEN cmdlen = 0;
    int has_slash = 0;

    if (!cmd)
	return Nullch;
    fullcmd = (char*)cmd;
    while (*fullcmd) {
	if (*fullcmd == '/' || *fullcmd == '\\')
	    has_slash++;
	fullcmd++;
	cmdlen++;
    }

    /* look in PATH */
    pathstr = PerlEnv_getenv("PATH");
    New(0, fullcmd, MAX_PATH+1, char);
    curfullcmd = fullcmd;

    while (1) {
	DWORD res;

	/* start by appending the name to the current prefix */
	strcpy(curfullcmd, cmd);
	curfullcmd += cmdlen;

	/* if it doesn't end with '.', or has no extension, try adding
	 * a trailing .exe first */
	if (cmd[cmdlen-1] != '.'
	    && (cmdlen < 4 || cmd[cmdlen-4] != '.'))
	{
	    strcpy(curfullcmd, ".exe");
	    res = GetFileAttributes(fullcmd);
	    if (res != 0xFFFFFFFF && !(res & FILE_ATTRIBUTE_DIRECTORY))
		return fullcmd;
	    *curfullcmd = '\0';
	}

	/* that failed, try the bare name */
	res = GetFileAttributes(fullcmd);
	if (res != 0xFFFFFFFF && !(res & FILE_ATTRIBUTE_DIRECTORY))
	    return fullcmd;

	/* quit if no other path exists, or if cmd already has path */
	if (!pathstr || !*pathstr || has_slash)
	    break;

	/* skip leading semis */
	while (*pathstr == ';')
	    pathstr++;

	/* build a new prefix from scratch */
	curfullcmd = fullcmd;
	while (*pathstr && *pathstr != ';') {
	    if (*pathstr == '"') {	/* foo;"baz;etc";bar */
		pathstr++;		/* skip initial '"' */
		while (*pathstr && *pathstr != '"') {
		    if (curfullcmd-fullcmd < MAX_PATH-cmdlen-5)
			*curfullcmd++ = *pathstr;
		    pathstr++;
		}
		if (*pathstr)
		    pathstr++;		/* skip trailing '"' */
	    }
	    else {
		if (curfullcmd-fullcmd < MAX_PATH-cmdlen-5)
		    *curfullcmd++ = *pathstr;
		pathstr++;
	    }
	}
	if (*pathstr)
	    pathstr++;			/* skip trailing semi */
	if (curfullcmd > fullcmd	/* append a dir separator */
	    && curfullcmd[-1] != '/' && curfullcmd[-1] != '\\')
	{
	    *curfullcmd++ = '\\';
	}
    }
GIVE_UP:
    Safefree(fullcmd);
    return Nullch;
}

/* The following are just place holders.
 * Some hosts may provide and environment that the OS is
 * not tracking, therefore, these host must provide that
 * environment and the current directory to CreateProcess
 */

DllExport void*
win32_get_childenv(void)
{
    return NULL;
}

DllExport void
win32_free_childenv(void* d)
{
}

DllExport void
win32_clearenv(void)
{
    char *envv = GetEnvironmentStrings();
    char *cur = envv;
    STRLEN len;
    while (*cur) {
	char *end = strchr(cur,'=');
	if (end && end != cur) {
	    *end = '\0';
	    SetEnvironmentVariable(cur, NULL);
	    *end = '=';
	    cur = end + strlen(end+1)+2;
	}
	else if ((len = strlen(cur)))
	    cur += len+1;
    }
    FreeEnvironmentStrings(envv);
}

DllExport char*
win32_get_childdir(void)
{
    dTHX;
    char* ptr;
    char szfilename[(MAX_PATH+1)*2];
    if (USING_WIDE()) {
	WCHAR wfilename[MAX_PATH+1];
	GetCurrentDirectoryW(MAX_PATH+1, wfilename);
	W2AHELPER(wfilename, szfilename, sizeof(szfilename));
    }
    else {
	GetCurrentDirectoryA(MAX_PATH+1, szfilename);
    }

    New(0, ptr, strlen(szfilename)+1, char);
    strcpy(ptr, szfilename);
    return ptr;
}

DllExport void
win32_free_childdir(char* d)
{
    dTHX;
    Safefree(d);
}


/* XXX this needs to be made more compatible with the spawnvp()
 * provided by the various RTLs.  In particular, searching for
 * *.{com,bat,cmd} files (as done by the RTLs) is unimplemented.
 * This doesn't significantly affect perl itself, because we
 * always invoke things using PERL5SHELL if a direct attempt to
 * spawn the executable fails.
 *
 * XXX splitting and rejoining the commandline between do_aspawn()
 * and win32_spawnvp() could also be avoided.
 */

DllExport int
win32_spawnvp(int mode, const char *cmdname, const char *const *argv)
{
#ifdef USE_RTL_SPAWNVP
    return spawnvp(mode, cmdname, (char * const *)argv);
#else
    dTHX;
    int ret;
    void* env;
    char* dir;
    child_IO_table tbl;
    STARTUPINFO StartupInfo;
    PROCESS_INFORMATION ProcessInformation;
    DWORD create = 0;
    char *cmd;
    char *fullcmd = Nullch;
    char *cname = (char *)cmdname;
    STRLEN clen = 0;

    if (cname) {
	clen = strlen(cname);
	/* if command name contains dquotes, must remove them */
	if (strchr(cname, '"')) {
	    cmd = cname;
	    New(0,cname,clen+1,char);
	    clen = 0;
	    while (*cmd) {
		if (*cmd != '"') {
		    cname[clen] = *cmd;
		    ++clen;
		}