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win32.c
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win32.c
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/* WIN32.C
*
* (c) 1995 Microsoft Corporation. All rights reserved.
* Developed by hip communications inc.
* 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
/* for CreateSymbolicLinkA() etc */
#define _WIN32_WINNT 0x0601
#include <tchar.h>
#ifdef __GNUC__
# define Win32_Winsock
#endif
#include <windows.h>
#ifndef HWND_MESSAGE
# define HWND_MESSAGE ((HWND)-3)
#endif
#ifndef PROCESSOR_ARCHITECTURE_AMD64
# define PROCESSOR_ARCHITECTURE_AMD64 9
#endif
#ifndef WC_NO_BEST_FIT_CHARS
# define WC_NO_BEST_FIT_CHARS 0x00000400
#endif
#include <winnt.h>
#include <commctrl.h>
#include <tlhelp32.h>
#include <io.h>
#include <signal.h>
#include <winioctl.h>
/* #include "config.h" */
#define PerlIO FILE
#include <sys/stat.h>
#include "EXTERN.h"
#include "perl.h"
#define NO_XSLOCKS
#define PERL_NO_GET_CONTEXT
#include "XSUB.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>
#include <sys/utime.h>
#include <wchar.h>
#ifdef __GNUC__
/* Mingw32 defaults to globing command line
* So we turn it off like this:
*/
int _CRT_glob = 0;
#endif
#if defined(__MINGW32__) && (__MINGW32_MAJOR_VERSION==1)
/* Mingw32-1.1 is missing some prototypes */
START_EXTERN_C
FILE * _wfopen(LPCWSTR wszFileName, LPCWSTR wszMode);
FILE * _wfdopen(int nFd, LPCWSTR wszMode);
FILE * _freopen(LPCWSTR wszFileName, LPCWSTR wszMode, FILE * pOldStream);
int _flushall();
int _fcloseall();
END_EXTERN_C
#endif
#define EXECF_EXEC 1
#define EXECF_SPAWN 2
#define EXECF_SPAWN_NOWAIT 3
#if defined(PERL_IMPLICIT_SYS)
# undef getlogin
# define getlogin g_getlogin
#endif
#ifdef _MSC_VER
# define SET_INVALID_PARAMETER_HANDLER
#endif
#ifdef SET_INVALID_PARAMETER_HANDLER
static BOOL set_silent_invalid_parameter_handler(BOOL newvalue);
static void my_invalid_parameter_handler(const wchar_t* expression,
const wchar_t* function, const wchar_t* file,
unsigned int line, uintptr_t pReserved);
#endif
#ifndef WIN32_NO_REGISTRY
static char* get_regstr_from(HKEY hkey, const char *valuename, SV **svp);
static char* get_regstr(const char *valuename, SV **svp);
#endif
static char* get_emd_part(SV **prev_pathp, STRLEN *const len,
char *trailing, ...);
static char* win32_get_xlib(const char *pl,
WIN32_NO_REGISTRY_M_(const char *xlib)
const char *libname, STRLEN *const len);
static BOOL has_shell_metachars(const char *ptr);
static long tokenize(const char *str, char **dest, char ***destv);
static void get_shell(void);
static char* find_next_space(const char *s);
static int do_spawn2(pTHX_ const char *cmd, int exectype);
static int do_spawn2_handles(pTHX_ const char *cmd, int exectype,
const int *handles);
static int do_spawnvp_handles(int mode, const char *cmdname,
const char * const *argv, const int *handles);
static PerlIO * do_popen(const char *mode, const char *command, IV narg,
SV **args);
static long find_pid(pTHX_ int pid);
static void remove_dead_process(long child);
static int terminate_process(DWORD pid, HANDLE process_handle, int sig);
static int my_killpg(int pid, int sig);
static int my_kill(int pid, int sig);
static void out_of_memory(void);
static char* wstr_to_str(const wchar_t* wstr);
static long filetime_to_clock(PFILETIME ft);
static BOOL filetime_from_time(PFILETIME ft, time_t t);
static char* create_command_line(char *cname, STRLEN clen,
const char * const *args);
static char* qualified_path(const char *cmd, bool other_exts);
static void ansify_path(void);
static LRESULT win32_process_message(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam);
#ifdef USE_ITHREADS
static long find_pseudo_pid(pTHX_ int pid);
static void remove_dead_pseudo_process(long child);
static HWND get_hwnd_delay(pTHX, long child, DWORD tries);
#endif
#ifdef HAVE_INTERP_INTERN
static void win32_csighandler(int sig);
#endif
static void translate_to_errno(void);
START_EXTERN_C
HANDLE w32_perldll_handle = INVALID_HANDLE_VALUE;
char w32_module_name[MAX_PATH+1];
#ifdef WIN32_DYN_IOINFO_SIZE
Size_t w32_ioinfo_size;/* avoid 0 extend op b4 mul, otherwise could be a U8 */
#endif
END_EXTERN_C
static OSVERSIONINFO g_osver = {0, 0, 0, 0, 0, ""};
#ifndef WIN32_NO_REGISTRY
/* initialized by Perl_win32_init/PERL_SYS_INIT */
static HKEY HKCU_Perl_hnd;
static HKEY HKLM_Perl_hnd;
#endif
/* the time_t epoch start time as a filetime expressed as a large integer */
static ULARGE_INTEGER time_t_epoch_base_filetime;
static const SYSTEMTIME time_t_epoch_base_systemtime = {
1970, /* wYear */
1, /* wMonth */
0, /* wDayOfWeek */
1, /* wDay */
0, /* wHour */
0, /* wMinute */
0, /* wSecond */
0 /* wMilliseconds */
};
#define FILETIME_CHUNKS_PER_SECOND (10000000UL)
#ifdef USE_ITHREADS
static perl_mutex win32_read_console_mutex;
#endif
#ifdef SET_INVALID_PARAMETER_HANDLER
static BOOL silent_invalid_parameter_handler = FALSE;
static BOOL
set_silent_invalid_parameter_handler(BOOL newvalue)
{
BOOL oldvalue = silent_invalid_parameter_handler;
# ifdef _DEBUG
silent_invalid_parameter_handler = newvalue;
# endif
return oldvalue;
}
static void
my_invalid_parameter_handler(const wchar_t* expression,
const wchar_t* function,
const wchar_t* file,
unsigned int line,
uintptr_t pReserved)
{
# ifdef _DEBUG
char* ansi_expression;
char* ansi_function;
char* ansi_file;
if (silent_invalid_parameter_handler)
return;
ansi_expression = wstr_to_str(expression);
ansi_function = wstr_to_str(function);
ansi_file = wstr_to_str(file);
fprintf(stderr, "Invalid parameter detected in function %s. "
"File: %s, line: %d\n", ansi_function, ansi_file, line);
fprintf(stderr, "Expression: %s\n", ansi_expression);
free(ansi_expression);
free(ansi_function);
free(ansi_file);
# endif
}
#endif
EXTERN_C void
set_w32_module_name(void)
{
/* this function may be called at DLL_PROCESS_ATTACH time */
char* ptr;
HMODULE module = (HMODULE)((w32_perldll_handle == INVALID_HANDLE_VALUE)
? GetModuleHandle(NULL)
: w32_perldll_handle);
WCHAR modulename[MAX_PATH];
WCHAR fullname[MAX_PATH];
char *ansi;
DWORD (__stdcall *pfnGetLongPathNameW)(LPCWSTR, LPWSTR, DWORD) =
(DWORD (__stdcall *)(LPCWSTR, LPWSTR, DWORD))
GetProcAddress(GetModuleHandle("kernel32.dll"), "GetLongPathNameW");
GetModuleFileNameW(module, modulename, sizeof(modulename)/sizeof(WCHAR));
/* Make sure we get an absolute pathname in case the module was loaded
* explicitly by LoadLibrary() with a relative path. */
GetFullPathNameW(modulename, sizeof(fullname)/sizeof(WCHAR), fullname, NULL);
/* Make sure we start with the long path name of the module because we
* later scan for pathname components to match "5.xx" to locate
* compatible sitelib directories, and the short pathname might mangle
* this path segment (e.g. by removing the dot on NTFS to something
* like "5xx~1.yy") */
if (pfnGetLongPathNameW)
pfnGetLongPathNameW(fullname, fullname, sizeof(fullname)/sizeof(WCHAR));
/* remove \\?\ prefix */
if (memcmp(fullname, L"\\\\?\\", 4*sizeof(WCHAR)) == 0)
memmove(fullname, fullname+4, (wcslen(fullname+4)+1)*sizeof(WCHAR));
ansi = win32_ansipath(fullname);
my_strlcpy(w32_module_name, ansi, sizeof(w32_module_name));
win32_free(ansi);
/* normalize to forward slashes */
ptr = w32_module_name;
while (*ptr) {
if (*ptr == '\\')
*ptr = '/';
++ptr;
}
}
#ifndef WIN32_NO_REGISTRY
/* *svp (if non-NULL) is expected to be POK (valid allocated SvPVX(*svp)) */
static char*
get_regstr_from(HKEY handle, const char *valuename, SV **svp)
{
/* Retrieve a REG_SZ or REG_EXPAND_SZ from the registry */
DWORD type;
char *str = NULL;
long retval;
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(newSVpvs(""));
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);
}
}
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;
if (HKCU_Perl_hnd) {
str = get_regstr_from(HKCU_Perl_hnd, valuename, svp);
if (!str)
goto try_HKLM;
}
else {
try_HKLM:
if (HKLM_Perl_hnd)
str = get_regstr_from(HKLM_Perl_hnd, valuename, svp);
else
str = NULL;
}
return str;
}
#endif /* ifndef WIN32_NO_REGISTRY */
/* *prev_pathp (if non-NULL) is expected to be POK (valid allocated SvPVX(sv)) */
static char *
get_emd_part(SV **prev_pathp, STRLEN *const len, char *trailing_path, ...)
{
char base[10];
va_list ap;
char mod_name[MAX_PATH+1];
char *ptr;
char *optr;
char *strip;
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'
&& strnEQ(strip, base, baselen)
&& strnEQ(ptr+1, base, baselen)))
{
*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(newSVpvs(""));
else if (SvPVX(*prev_pathp))
sv_catpvs(*prev_pathp, ";");
sv_catpv(*prev_pathp, mod_name);
if(len)
*len = SvCUR(*prev_pathp);
return SvPVX(*prev_pathp);
}
return NULL;
}
EXTERN_C char *
win32_get_privlib(WIN32_NO_REGISTRY_M_(const char *pl) STRLEN *const len)
{
char *stdlib = "lib";
SV *sv = NULL;
#ifndef WIN32_NO_REGISTRY
char buffer[MAX_PATH+1];
/* $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);
#endif
/* $stdlib .= ";$EMD/../../lib" */
return get_emd_part(&sv, len, stdlib, ARCHNAME, "bin", NULL);
}
static char *
win32_get_xlib(const char *pl, WIN32_NO_REGISTRY_M_(const char *xlib)
const char *libname, STRLEN *const len)
{
#ifndef WIN32_NO_REGISTRY
char regstr[40];
#endif
char pathstr[MAX_PATH+1];
SV *sv1 = NULL;
SV *sv2 = NULL;
#ifndef WIN32_NO_REGISTRY
/* $HKCU{"$xlib-$]"} || $HKLM{"$xlib-$]"} . ---; */
sprintf(regstr, "%s-%s", xlib, pl);
(void)get_regstr(regstr, &sv1);
#endif
/* $xlib .=
* ";$EMD/" . ((-d $EMD/../../../$]) ? "../../.." : "../.."). "/$libname/$]/lib"; */
sprintf(pathstr, "%s/%s/lib", libname, pl);
(void)get_emd_part(&sv1, NULL, pathstr, ARCHNAME, "bin", pl, NULL);
#ifndef WIN32_NO_REGISTRY
/* $HKCU{$xlib} || $HKLM{$xlib} . ---; */
(void)get_regstr(xlib, &sv2);
#endif
/* $xlib .=
* ";$EMD/" . ((-d $EMD/../../../$]) ? "../../.." : "../.."). "/$libname/lib"; */
sprintf(pathstr, "%s/lib", libname);
(void)get_emd_part(&sv2, NULL, pathstr, ARCHNAME, "bin", pl, NULL);
if (!sv1 && !sv2)
return NULL;
if (!sv1) {
sv1 = sv2;
} else if (sv2) {
dTHX;
sv_catpvs(sv1, ";");
sv_catsv(sv1, sv2);
}
if (len)
*len = SvCUR(sv1);
return SvPVX(sv1);
}
EXTERN_C char *
win32_get_sitelib(const char *pl, STRLEN *const len)
{
return win32_get_xlib(pl, WIN32_NO_REGISTRY_M_("sitelib") "site", len);
}
#ifndef PERL_VENDORLIB_NAME
# define PERL_VENDORLIB_NAME "vendor"
#endif
EXTERN_C char *
win32_get_vendorlib(const char *pl, STRLEN *const len)
{
return win32_get_xlib(pl, WIN32_NO_REGISTRY_M_("vendorlib") PERL_VENDORLIB_NAME, len);
}
static BOOL
has_shell_metachars(const 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_ const char *cmd, const char *mode)
{
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)
{
return (unsigned long)g_osver.dwPlatformId;
}
DllExport int
win32_getpid(void)
{
#ifdef USE_ITHREADS
dTHX;
if (w32_pseudo_id)
return -((int)w32_pseudo_id);
#endif
return _getpid();
}
/* 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 = NULL;
char **retvstart = 0;
int items = -1;
if (str) {
int slen = strlen(str);
char *ret;
char **retv;
Newx(ret, slen+2, char);
Newx(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] = NULL;
*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 = "cmd.exe /x/d/c";
const char *usershell = PerlEnv_getenv("PERL5SHELL");
w32_perlshell_items = tokenize(usershell ? usershell : defaultshell,
&w32_perlshell_tokens,
&w32_perlshell_vec);
}
}
int
Perl_do_aspawn(pTHX_ SV *really, SV **mark, SV **sp)
{
char **argv;
char *str;
int status;
int flag = P_WAIT;
int index = 0;
int eno;
PERL_ARGS_ASSERT_DO_ASPAWN;
if (sp <= mark)
return -1;
get_shell();
Newx(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 && (eno = errno, (eno == ENOEXEC || eno == 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) {
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;
}
static int
do_spawn2(pTHX_ const char *cmd, int exectype) {
return do_spawn2_handles(aTHX_ cmd, exectype, NULL);
}
static int
do_spawn2_handles(pTHX_ const char *cmd, int exectype, const int *handles)
{
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)) {
Newx(argv, strlen(cmd) / 2 + 2, char*);
Newx(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 = NULL;
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 = do_spawnvp_handles(P_NOWAIT, argv[0],
(const char* const*)argv, handles);
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();
Newx(argv, w32_perlshell_items + 2, char*);
while (++i < w32_perlshell_items)
argv[i] = w32_perlshell_vec[i];
argv[i++] = (char *)cmd;
argv[i] = NULL;
switch (exectype) {
case EXECF_SPAWN:
status = win32_spawnvp(P_WAIT, argv[0],
(const char* const*)argv);
break;
case EXECF_SPAWN_NOWAIT:
status = do_spawnvp_handles(P_NOWAIT, argv[0],
(const char* const*)argv, handles);
break;
case EXECF_EXEC:
status = win32_execvp(argv[0], (const char* const*)argv);
break;
}
cmd = argv[0];
Safefree(argv);
}
if (exectype == EXECF_SPAWN_NOWAIT) {
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
Perl_do_spawn(pTHX_ char *cmd)
{
PERL_ARGS_ASSERT_DO_SPAWN;
return do_spawn2(aTHX_ cmd, EXECF_SPAWN);
}
int
Perl_do_spawn_nowait(pTHX_ char *cmd)
{
PERL_ARGS_ASSERT_DO_SPAWN_NOWAIT;
return do_spawn2(aTHX_ cmd, EXECF_SPAWN_NOWAIT);
}
bool
Perl_do_exec(pTHX_ const char *cmd)
{
PERL_ARGS_ASSERT_DO_EXEC;
do_spawn2(aTHX_ 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(const char *filename)
{
dTHXa(NULL);
DIR *dirp;
long len;
long idx;
char scanname[MAX_PATH+3];
WCHAR wscanname[sizeof(scanname)];
WIN32_FIND_DATAW wFindData;
char buffer[MAX_PATH*2];
BOOL use_default;
len = strlen(filename);
if (len == 0) {
errno = ENOENT;
return NULL;
}
if (len > MAX_PATH) {
errno = ENAMETOOLONG;
return NULL;
}
/* Get us a DIR structure */
Newxz(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 */
MultiByteToWideChar(CP_ACP, 0, scanname, -1, wscanname, sizeof(wscanname)/sizeof(WCHAR));
aTHXa(PERL_GET_THX);
dirp->handle = FindFirstFileW(PerlDir_mapW(wscanname), &wFindData);
if (dirp->handle == 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;
}
use_default = FALSE;
WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS,
wFindData.cFileName, -1,
buffer, sizeof(buffer), NULL, &use_default);
if (use_default && *wFindData.cAlternateFileName) {
WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS,
wFindData.cAlternateFileName, -1,
buffer, sizeof(buffer), NULL, NULL);
}
/* now allocate the first part of the string table for
* the filenames that we find.
*/
idx = strlen(buffer)+1;
if (idx < 256)
dirp->size = 256;
else
dirp->size = idx;
Newx(dirp->start, dirp->size, char);
strcpy(dirp->start, buffer);
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) {
BOOL res;
char buffer[MAX_PATH*2];
if (dirp->handle == INVALID_HANDLE_VALUE) {
res = 0;
}
/* finding the next file that matches the wildcard
* (which should be all of them in this directory!).
*/
else {
WIN32_FIND_DATAW wFindData;
res = FindNextFileW(dirp->handle, &wFindData);
if (res) {
BOOL use_default = FALSE;
WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS,
wFindData.cFileName, -1,
buffer, sizeof(buffer), NULL, &use_default);
if (use_default && *wFindData.cAlternateFileName) {
WideCharToMultiByte(CP_ACP, WC_NO_BEST_FIT_CHARS,
wFindData.cAlternateFileName, -1,
buffer, sizeof(buffer), NULL, NULL);
}
}
}
if (res) {
long endpos = dirp->end - dirp->start;
long newsize = endpos + strlen(buffer) + 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;
Renew(dirp->start, dirp->size * 2, char);
dirp->size *= 2;
dirp->curr = dirp->start + curpos;
}
strcpy(dirp->start + endpos, buffer);
dirp->end = dirp->start + newsize;
dirp->nfiles++;
}
else {
dirp->curr = NULL;
if (dirp->handle != INVALID_HANDLE_VALUE) {
FindClose(dirp->handle);
dirp->handle = INVALID_HANDLE_VALUE;
}
}
}
return &(dirp->dirstr);
}