Ruby  2.7.2p137(2020-10-01revision5445e0435260b449decf2ac16f9d09bae3cafe72)
file.c
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1 #if defined(__MINGW32__)
2 /* before stdio.h in ruby/define.h */
3 # define MINGW_HAS_SECURE_API 1
4 #endif
5 #include "ruby/ruby.h"
6 #include "ruby/encoding.h"
7 #include "internal.h"
8 #include <winbase.h>
9 #include <wchar.h>
10 #include <shlwapi.h>
11 #include "win32/file.h"
12 
13 #ifndef INVALID_FILE_ATTRIBUTES
14 # define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
15 #endif
16 
17 /* cache 'encoding name' => 'code page' into a hash */
18 static struct code_page_table {
19  USHORT *table;
20  unsigned int count;
21 } rb_code_page;
22 
23 #define IS_DIR_SEPARATOR_P(c) (c == L'\\' || c == L'/')
24 #define IS_DIR_UNC_P(c) (IS_DIR_SEPARATOR_P(c[0]) && IS_DIR_SEPARATOR_P(c[1]))
25 static int
26 IS_ABSOLUTE_PATH_P(const WCHAR *path, size_t len)
27 {
28  if (len < 2) return FALSE;
29  if (ISALPHA(path[0]))
30  return len > 2 && path[1] == L':' && IS_DIR_SEPARATOR_P(path[2]);
31  else
32  return IS_DIR_UNC_P(path);
33 }
34 
35 /* MultiByteToWideChar() doesn't work with code page 51932 */
36 #define INVALID_CODE_PAGE 51932
37 #define PATH_BUFFER_SIZE MAX_PATH * 2
38 
39 #define insecure_obj_p(obj, level) ((level) > 0 && OBJ_TAINTED(obj))
40 
41 /* defined in win32/win32.c */
42 #define system_code_page rb_w32_filecp
43 #define mbstr_to_wstr rb_w32_mbstr_to_wstr
44 #define wstr_to_mbstr rb_w32_wstr_to_mbstr
45 
46 static inline void
47 replace_wchar(wchar_t *s, int find, int replace)
48 {
49  while (*s != 0) {
50  if (*s == find)
51  *s = replace;
52  s++;
53  }
54 }
55 
56 /* Remove trailing invalid ':$DATA' of the path. */
57 static inline size_t
58 remove_invalid_alternative_data(wchar_t *wfullpath, size_t size)
59 {
60  static const wchar_t prime[] = L":$DATA";
61  enum { prime_len = (sizeof(prime) / sizeof(wchar_t)) -1 };
62 
63  if (size <= prime_len || _wcsnicmp(wfullpath + size - prime_len, prime, prime_len) != 0)
64  return size;
65 
66  /* alias of stream */
67  /* get rid of a bug of x64 VC++ */
68  if (wfullpath[size - (prime_len + 1)] == ':') {
69  /* remove trailing '::$DATA' */
70  size -= prime_len + 1; /* prime */
71  wfullpath[size] = L'\0';
72  }
73  else {
74  /* remove trailing ':$DATA' of paths like '/aa:a:$DATA' */
75  wchar_t *pos = wfullpath + size - (prime_len + 1);
76  while (!IS_DIR_SEPARATOR_P(*pos) && pos != wfullpath) {
77  if (*pos == L':') {
78  size -= prime_len; /* alternative */
79  wfullpath[size] = L'\0';
80  break;
81  }
82  pos--;
83  }
84  }
85  return size;
86 }
87 
89 
90 static int
91 code_page_i(st_data_t name, st_data_t idx, st_data_t arg)
92 {
93  const char *n = (const char *)name;
94  if (strncmp("CP", n, 2) == 0) {
95  int code_page = atoi(n + 2);
96  if (code_page != 0) {
97  struct code_page_table *cp = (struct code_page_table *)arg;
98  unsigned int count = cp->count;
99  USHORT *table = cp->table;
100  if (count <= idx) {
101  unsigned int i = count;
102  count = (((idx + 4) & ~31) | 28);
103  table = realloc(table, count * sizeof(*table));
104  if (!table) return ST_CONTINUE;
105  cp->count = count;
106  cp->table = table;
107  while (i < count) table[i++] = INVALID_CODE_PAGE;
108  }
109  table[idx] = (USHORT)code_page;
110  }
111  }
112  return ST_CONTINUE;
113 }
114 
115 /*
116  Return code page number of the encoding.
117  Cache code page into a hash for performance since finding the code page in
118  Encoding#names is slow.
119 */
120 static UINT
121 code_page(rb_encoding *enc)
122 {
123  int enc_idx;
124 
125  if (!enc)
126  return system_code_page();
127 
128  enc_idx = rb_enc_to_index(enc);
129 
130  /* map US-ASCII and ASCII-8bit as code page 1252 (us-ascii) */
131  if (enc_idx == rb_usascii_encindex() || enc_idx == rb_ascii8bit_encindex()) {
132  return 1252;
133  }
134  if (enc_idx == rb_utf8_encindex()) {
135  return CP_UTF8;
136  }
137 
138  if (0 <= enc_idx && (unsigned int)enc_idx < rb_code_page.count)
139  return rb_code_page.table[enc_idx];
140 
141  return INVALID_CODE_PAGE;
142 }
143 
144 #define fix_string_encoding(str, encoding) rb_str_conv_enc((str), (encoding), rb_utf8_encoding())
145 
146 /*
147  Replace the last part of the path to long name.
148  We try to avoid to call FindFirstFileW() since it takes long time.
149 */
150 static inline size_t
151 replace_to_long_name(wchar_t **wfullpath, size_t size, size_t buffer_size)
152 {
153  WIN32_FIND_DATAW find_data;
154  HANDLE find_handle;
155 
156  /*
157  Skip long name conversion if the path is already long name.
158  Short name is 8.3 format.
159  http://en.wikipedia.org/wiki/8.3_filename
160  This check can be skipped for directory components that have file
161  extensions longer than 3 characters, or total lengths longer than
162  12 characters.
163  http://msdn.microsoft.com/en-us/library/windows/desktop/aa364980(v=vs.85).aspx
164  */
165  size_t const max_short_name_size = 8 + 1 + 3;
166  size_t const max_extension_size = 3;
167  size_t path_len = 1, extension_len = 0;
168  wchar_t *pos = *wfullpath;
169 
170  if (size == 3 && pos[1] == L':' && pos[2] == L'\\' && pos[3] == L'\0') {
171  /* root path doesn't need short name expansion */
172  return size;
173  }
174 
175  /* skip long name conversion if path contains wildcard characters */
176  if (wcspbrk(pos, L"*?")) {
177  return size;
178  }
179 
180  pos = *wfullpath + size - 1;
181  while (!IS_DIR_SEPARATOR_P(*pos) && pos != *wfullpath) {
182  if (!extension_len && *pos == L'.') {
183  extension_len = path_len - 1;
184  }
185  if (path_len > max_short_name_size || extension_len > max_extension_size) {
186  return size;
187  }
188  path_len++;
189  pos--;
190  }
191 
192  if ((pos >= *wfullpath + 2) &&
193  (*wfullpath)[0] == L'\\' && (*wfullpath)[1] == L'\\') {
194  /* UNC path: no short file name, and needs Network Share
195  * Management functions instead of FindFirstFile. */
196  if (pos == *wfullpath + 2) {
197  /* //host only */
198  return size;
199  }
200  if (!wmemchr(*wfullpath + 2, L'\\', pos - *wfullpath - 2)) {
201  /* //host/share only */
202  return size;
203  }
204  }
205 
206  find_handle = FindFirstFileW(*wfullpath, &find_data);
207  if (find_handle != INVALID_HANDLE_VALUE) {
208  size_t trail_pos = pos - *wfullpath + IS_DIR_SEPARATOR_P(*pos);
209  size_t file_len = wcslen(find_data.cFileName);
210  size_t oldsize = size;
211 
212  FindClose(find_handle);
213  size = trail_pos + file_len;
214  if (size > (buffer_size ? buffer_size-1 : oldsize)) {
215  wchar_t *buf = ALLOC_N(wchar_t, (size + 1));
216  wcsncpy(buf, *wfullpath, trail_pos);
217  if (!buffer_size)
218  xfree(*wfullpath);
219  *wfullpath = buf;
220  }
221  wcsncpy(*wfullpath + trail_pos, find_data.cFileName, file_len + 1);
222  }
223  return size;
224 }
225 
226 static inline size_t
227 user_length_in_path(const wchar_t *wuser, size_t len)
228 {
229  size_t i;
230 
231  for (i = 0; i < len && !IS_DIR_SEPARATOR_P(wuser[i]); i++)
232  ;
233 
234  return i;
235 }
236 
237 static VALUE
238 append_wstr(VALUE dst, const WCHAR *ws, ssize_t len, UINT cp, rb_encoding *enc)
239 {
240  long olen, nlen = (long)len;
241 
242  if (cp != INVALID_CODE_PAGE) {
243  if (len == -1) len = lstrlenW(ws);
244  nlen = WideCharToMultiByte(cp, 0, ws, len, NULL, 0, NULL, NULL);
245  olen = RSTRING_LEN(dst);
246  rb_str_modify_expand(dst, nlen);
247  WideCharToMultiByte(cp, 0, ws, len, RSTRING_PTR(dst) + olen, nlen, NULL, NULL);
248  rb_enc_associate(dst, enc);
249  rb_str_set_len(dst, olen + nlen);
250  }
251  else {
252  const int replaceflags = ECONV_UNDEF_REPLACE|ECONV_INVALID_REPLACE;
253  char *utf8str = wstr_to_mbstr(CP_UTF8, ws, (int)len, &nlen);
254  rb_econv_t *ec = rb_econv_open("UTF-8", rb_enc_name(enc), replaceflags);
255  dst = rb_econv_append(ec, utf8str, nlen, dst, replaceflags);
256  rb_econv_close(ec);
257  free(utf8str);
258  }
259  return dst;
260 }
261 
262 VALUE
264 {
265  WCHAR *dir = rb_w32_home_dir();
266  if (!dir) {
267  rb_raise(rb_eArgError, "couldn't find HOME environment -- expanding `~'");
268  }
269  append_wstr(result, dir, -1,
271  xfree(dir);
272  return result;
273 }
274 
275 VALUE
276 rb_file_expand_path_internal(VALUE fname, VALUE dname, int abs_mode, int long_name, VALUE result)
277 {
278  size_t size = 0, whome_len = 0;
279  size_t buffer_len = 0;
280  long wpath_len = 0, wdir_len = 0;
281  wchar_t *wfullpath = NULL, *wpath = NULL, *wpath_pos = NULL;
282  wchar_t *wdir = NULL, *wdir_pos = NULL;
283  wchar_t *whome = NULL, *buffer = NULL, *buffer_pos = NULL;
284  UINT path_cp, cp;
285  VALUE path = fname, dir = dname;
286  wchar_t wfullpath_buffer[PATH_BUFFER_SIZE];
287  wchar_t path_drive = L'\0', dir_drive = L'\0';
288  int ignore_dir = 0;
289  rb_encoding *path_encoding;
290  int tainted = 0;
291 
292  /* tainted if path is tainted */
293  tainted = OBJ_TAINTED(path);
294 
295  /* get path encoding */
296  if (NIL_P(dir)) {
297  path_encoding = rb_enc_get(path);
298  }
299  else {
300  path_encoding = rb_enc_check(path, dir);
301  }
302 
303  cp = path_cp = code_page(path_encoding);
304 
305  /* workaround invalid codepage */
306  if (path_cp == INVALID_CODE_PAGE) {
307  cp = CP_UTF8;
308  if (!NIL_P(path)) {
309  path = fix_string_encoding(path, path_encoding);
310  }
311  }
312 
313  /* convert char * to wchar_t */
314  if (!NIL_P(path)) {
315  const long path_len = RSTRING_LEN(path);
316 #if SIZEOF_INT < SIZEOF_LONG
317  if ((long)(int)path_len != path_len) {
318  rb_raise(rb_eRangeError, "path (%ld bytes) is too long",
319  path_len);
320  }
321 #endif
322  wpath = mbstr_to_wstr(cp, RSTRING_PTR(path), path_len, &wpath_len);
323  wpath_pos = wpath;
324  }
325 
326  /* determine if we need the user's home directory */
327  /* expand '~' only if NOT rb_file_absolute_path() where `abs_mode` is 1 */
328  if (abs_mode == 0 && wpath_len > 0 && wpath_pos[0] == L'~' &&
329  (wpath_len == 1 || IS_DIR_SEPARATOR_P(wpath_pos[1]))) {
330  /* tainted if expanding '~' */
331  tainted = 1;
332 
333  whome = rb_w32_home_dir();
334  if (whome == NULL) {
335  free(wpath);
336  rb_raise(rb_eArgError, "couldn't find HOME environment -- expanding `~'");
337  }
338  whome_len = wcslen(whome);
339 
340  if (!IS_ABSOLUTE_PATH_P(whome, whome_len)) {
341  free(wpath);
342  xfree(whome);
343  rb_raise(rb_eArgError, "non-absolute home");
344  }
345 
346  if (path_cp == INVALID_CODE_PAGE || rb_enc_str_asciionly_p(path)) {
347  /* use filesystem encoding if expanding home dir */
348  path_encoding = rb_filesystem_encoding();
349  cp = path_cp = system_code_page();
350  }
351 
352  /* ignores dir since we are expanding home */
353  ignore_dir = 1;
354 
355  /* exclude ~ from the result */
356  wpath_pos++;
357  wpath_len--;
358 
359  /* exclude separator if present */
360  if (wpath_len && IS_DIR_SEPARATOR_P(wpath_pos[0])) {
361  wpath_pos++;
362  wpath_len--;
363  }
364  }
365  else if (wpath_len >= 2 && wpath_pos[1] == L':') {
366  if (wpath_len >= 3 && IS_DIR_SEPARATOR_P(wpath_pos[2])) {
367  /* ignore dir since path contains a drive letter and a root slash */
368  ignore_dir = 1;
369  }
370  else {
371  /* determine if we ignore dir or not later */
372  path_drive = wpath_pos[0];
373  wpath_pos += 2;
374  wpath_len -= 2;
375  }
376  }
377  else if (abs_mode == 0 && wpath_len >= 2 && wpath_pos[0] == L'~') {
378  result = rb_str_new_cstr("can't find user ");
379  result = append_wstr(result, wpath_pos + 1, user_length_in_path(wpath_pos + 1, wpath_len - 1),
380  path_cp, path_encoding);
381 
382  if (wpath)
383  free(wpath);
384 
386  }
387 
388  /* convert dir */
389  if (!ignore_dir && !NIL_P(dir)) {
390  /* fix string encoding */
391  if (path_cp == INVALID_CODE_PAGE) {
392  dir = fix_string_encoding(dir, path_encoding);
393  }
394 
395  /* convert char * to wchar_t */
396  if (!NIL_P(dir)) {
397  const long dir_len = RSTRING_LEN(dir);
398 #if SIZEOF_INT < SIZEOF_LONG
399  if ((long)(int)dir_len != dir_len) {
400  if (wpath) free(wpath);
401  rb_raise(rb_eRangeError, "base directory (%ld bytes) is too long",
402  dir_len);
403  }
404 #endif
405  wdir = mbstr_to_wstr(cp, RSTRING_PTR(dir), dir_len, &wdir_len);
406  wdir_pos = wdir;
407  }
408 
409  if (abs_mode == 0 && wdir_len > 0 && wdir_pos[0] == L'~' &&
410  (wdir_len == 1 || IS_DIR_SEPARATOR_P(wdir_pos[1]))) {
411  /* tainted if expanding '~' */
412  tainted = 1;
413 
414  whome = rb_w32_home_dir();
415  if (whome == NULL) {
416  free(wpath);
417  free(wdir);
418  rb_raise(rb_eArgError, "couldn't find HOME environment -- expanding `~'");
419  }
420  whome_len = wcslen(whome);
421 
422  if (!IS_ABSOLUTE_PATH_P(whome, whome_len)) {
423  free(wpath);
424  free(wdir);
425  xfree(whome);
426  rb_raise(rb_eArgError, "non-absolute home");
427  }
428 
429  /* exclude ~ from the result */
430  wdir_pos++;
431  wdir_len--;
432 
433  /* exclude separator if present */
434  if (wdir_len && IS_DIR_SEPARATOR_P(wdir_pos[0])) {
435  wdir_pos++;
436  wdir_len--;
437  }
438  }
439  else if (wdir_len >= 2 && wdir[1] == L':') {
440  dir_drive = wdir[0];
441  if (wpath_len && IS_DIR_SEPARATOR_P(wpath_pos[0])) {
442  wdir_len = 2;
443  }
444  }
445  else if (wdir_len >= 2 && IS_DIR_UNC_P(wdir)) {
446  /* UNC path */
447  if (wpath_len && IS_DIR_SEPARATOR_P(wpath_pos[0])) {
448  /* cut the UNC path tail to '//host/share' */
449  long separators = 0;
450  long pos = 2;
451  while (pos < wdir_len && separators < 2) {
452  if (IS_DIR_SEPARATOR_P(wdir[pos])) {
453  separators++;
454  }
455  pos++;
456  }
457  if (separators == 2)
458  wdir_len = pos - 1;
459  }
460  }
461  else if (abs_mode == 0 && wdir_len >= 2 && wdir_pos[0] == L'~') {
462  result = rb_str_new_cstr("can't find user ");
463  result = append_wstr(result, wdir_pos + 1, user_length_in_path(wdir_pos + 1, wdir_len - 1),
464  path_cp, path_encoding);
465  if (wpath)
466  free(wpath);
467 
468  if (wdir)
469  free(wdir);
470 
472  }
473  }
474 
475  /* determine if we ignore dir or not */
476  if (!ignore_dir && path_drive && dir_drive) {
477  if (towupper(path_drive) != towupper(dir_drive)) {
478  /* ignore dir since path drive is different from dir drive */
479  ignore_dir = 1;
480  wdir_len = 0;
481  dir_drive = 0;
482  }
483  }
484 
485  if (!ignore_dir && wpath_len >= 2 && IS_DIR_UNC_P(wpath)) {
486  /* ignore dir since path has UNC root */
487  ignore_dir = 1;
488  wdir_len = 0;
489  }
490  else if (!ignore_dir && wpath_len >= 1 && IS_DIR_SEPARATOR_P(wpath[0]) &&
491  !dir_drive && !(wdir_len >= 2 && IS_DIR_UNC_P(wdir))) {
492  /* ignore dir since path has root slash and dir doesn't have drive or UNC root */
493  ignore_dir = 1;
494  wdir_len = 0;
495  }
496 
497  buffer_len = wpath_len + 1 + wdir_len + 1 + whome_len + 1;
498 
499  buffer = buffer_pos = ALLOC_N(wchar_t, (buffer_len + 1));
500 
501  /* add home */
502  if (whome_len) {
503  wcsncpy(buffer_pos, whome, whome_len);
504  buffer_pos += whome_len;
505  }
506 
507  /* Add separator if required */
508  if (whome_len && wcsrchr(L"\\/:", buffer_pos[-1]) == NULL) {
509  buffer_pos[0] = L'\\';
510  buffer_pos++;
511  }
512  else if (!dir_drive && path_drive) {
513  *buffer_pos++ = path_drive;
514  *buffer_pos++ = L':';
515  }
516 
517  if (wdir_len) {
518  /* tainted if dir is used and dir is tainted */
519  if (!tainted && OBJ_TAINTED(dir))
520  tainted = 1;
521 
522  wcsncpy(buffer_pos, wdir_pos, wdir_len);
523  buffer_pos += wdir_len;
524  }
525 
526  /* add separator if required */
527  if (wdir_len && wcsrchr(L"\\/:", buffer_pos[-1]) == NULL) {
528  buffer_pos[0] = L'\\';
529  buffer_pos++;
530  }
531 
532  /* now deal with path */
533  if (wpath_len) {
534  wcsncpy(buffer_pos, wpath_pos, wpath_len);
535  buffer_pos += wpath_len;
536  }
537 
538  /* GetFullPathNameW requires at least "." to determine current directory */
539  if (wpath_len == 0) {
540  buffer_pos[0] = L'.';
541  buffer_pos++;
542  }
543 
544  /* Ensure buffer is NULL terminated */
545  buffer_pos[0] = L'\0';
546 
547  /* tainted if path is relative */
548  if (!tainted && !IS_ABSOLUTE_PATH_P(buffer, buffer_len))
549  tainted = 1;
550 
551  /* FIXME: Make this more robust */
552  /* Determine require buffer size */
553  size = GetFullPathNameW(buffer, PATH_BUFFER_SIZE, wfullpath_buffer, NULL);
554  if (size > PATH_BUFFER_SIZE) {
555  /* allocate more memory than allotted originally by PATH_BUFFER_SIZE */
556  wfullpath = ALLOC_N(wchar_t, size);
557  size = GetFullPathNameW(buffer, size, wfullpath, NULL);
558  }
559  else {
560  wfullpath = wfullpath_buffer;
561  }
562 
563  /* Remove any trailing slashes */
564  if (IS_DIR_SEPARATOR_P(wfullpath[size - 1]) &&
565  wfullpath[size - 2] != L':' &&
566  !(size == 2 && IS_DIR_UNC_P(wfullpath))) {
567  size -= 1;
568  wfullpath[size] = L'\0';
569  }
570 
571  /* Remove any trailing dot */
572  if (wfullpath[size - 1] == L'.') {
573  size -= 1;
574  wfullpath[size] = L'\0';
575  }
576 
577  /* removes trailing invalid ':$DATA' */
578  size = remove_invalid_alternative_data(wfullpath, size);
579 
580  /* Replace the trailing path to long name */
581  if (long_name) {
582  size_t bufsize = wfullpath == wfullpath_buffer ? PATH_BUFFER_SIZE : 0;
583  size = replace_to_long_name(&wfullpath, size, bufsize);
584  }
585 
586  /* sanitize backslashes with forwardslashes */
587  replace_wchar(wfullpath, L'\\', L'/');
588 
589  /* convert to VALUE and set the path encoding */
590  rb_str_set_len(result, 0);
591  result = append_wstr(result, wfullpath, size, path_cp, path_encoding);
592 
593  /* makes the result object tainted if expanding tainted strings or returning modified path */
594  if (tainted)
595  OBJ_TAINT(result);
596 
597  /* TODO: better cleanup */
598  if (buffer)
599  xfree(buffer);
600 
601  if (wpath)
602  free(wpath);
603 
604  if (wdir)
605  free(wdir);
606 
607  if (whome)
608  xfree(whome);
609 
610  if (wfullpath != wfullpath_buffer)
611  xfree(wfullpath);
612 
613  rb_enc_associate(result, path_encoding);
614  return result;
615 }
616 
617 VALUE
619 {
620  DWORD len;
621  VALUE wtmp = 0, wpathbuf, str;
622  rb_w32_reparse_buffer_t rbuf, *rp = &rbuf;
623  WCHAR *wpath, *wbuf;
624  rb_encoding *enc;
625  UINT cp, path_cp;
626  int e;
627 
629  enc = rb_enc_get(path);
630  cp = path_cp = code_page(enc);
631  if (cp == INVALID_CODE_PAGE) {
632  path = fix_string_encoding(path, enc);
633  cp = CP_UTF8;
634  }
635  len = MultiByteToWideChar(cp, 0, RSTRING_PTR(path), RSTRING_LEN(path), NULL, 0);
636  wpath = ALLOCV_N(WCHAR, wpathbuf, len+1);
637  MultiByteToWideChar(cp, 0, RSTRING_PTR(path), RSTRING_LEN(path), wpath, len);
638  wpath[len] = L'\0';
639  e = rb_w32_read_reparse_point(wpath, rp, sizeof(rbuf), &wbuf, &len);
640  if (e == ERROR_MORE_DATA) {
641  size_t size = rb_w32_reparse_buffer_size(len + 1);
642  rp = ALLOCV(wtmp, size);
643  e = rb_w32_read_reparse_point(wpath, rp, size, &wbuf, &len);
644  }
645  ALLOCV_END(wpathbuf);
646  if (e) {
647  ALLOCV_END(wtmp);
648  if (e != -1)
650  else /* not symlink; maybe volume mount point */
652  }
653  enc = resultenc;
654  path_cp = code_page(enc);
655  len = lstrlenW(wbuf);
656  str = append_wstr(rb_enc_str_new(0, 0, enc), wbuf, len, path_cp, enc);
657  ALLOCV_END(wtmp);
658  return str;
659 }
660 
661 int
662 rb_file_load_ok(const char *path)
663 {
664  DWORD attr;
665  int ret = 1;
666  long len;
667  wchar_t* wpath;
668 
669  wpath = mbstr_to_wstr(CP_UTF8, path, -1, &len);
670  if (!wpath) return 0;
671 
672  attr = GetFileAttributesW(wpath);
673  if (attr == INVALID_FILE_ATTRIBUTES ||
674  (attr & FILE_ATTRIBUTE_DIRECTORY)) {
675  ret = 0;
676  }
677  else {
678  HANDLE h = CreateFileW(wpath, GENERIC_READ,
679  FILE_SHARE_READ | FILE_SHARE_WRITE,
680  NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
681  if (h != INVALID_HANDLE_VALUE) {
682  CloseHandle(h);
683  }
684  else {
685  ret = 0;
686  }
687  }
688  free(wpath);
689  return ret;
690 }
691 
692 int
693 rb_freopen(VALUE fname, const char *mode, FILE *file)
694 {
695  WCHAR *wname, wmode[4];
696  VALUE wtmp;
697  char *name;
698  long len;
699  int e = 0, n = MultiByteToWideChar(CP_ACP, 0, mode, -1, NULL, 0);
700  if (n > numberof(wmode)) return EINVAL;
701  MultiByteToWideChar(CP_ACP, 0, mode, -1, wmode, numberof(wmode));
702  RSTRING_GETMEM(fname, name, len);
703  n = rb_long2int(len);
704  len = MultiByteToWideChar(CP_UTF8, 0, name, n, NULL, 0);
705  wname = ALLOCV_N(WCHAR, wtmp, len + 1);
706  len = MultiByteToWideChar(CP_UTF8, 0, name, n, wname, len);
707  wname[len] = L'\0';
708  RB_GC_GUARD(fname);
709 #if RUBY_MSVCRT_VERSION < 80 && !defined(HAVE__WFREOPEN_S)
710  e = _wfreopen(wname, wmode, file) ? 0 : errno;
711 #else
712  {
713  FILE *newfp = 0;
714  e = _wfreopen_s(&newfp, wname, wmode, file);
715  }
716 #endif
717  ALLOCV_END(wtmp);
718  return e;
719 }
720 
721 void
723 {
724  if (rb_code_page.count) return;
725  rb_enc_foreach_name(code_page_i, (st_data_t)&rb_code_page);
726 }
rb_w32_map_errno
int rb_w32_map_errno(DWORD)
Definition: win32.c:273
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VALUE rb_readlink(VALUE path, rb_encoding *resultenc)
Definition: file.c:618
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Definition: encoding.h:177
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Definition: rb_mjit_min_header-2.7.2.h:5458
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#define rb_w32_reparse_buffer_size(n)
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int rb_file_load_ok(const char *path)
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int rb_enc_to_index(rb_encoding *enc)
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rb_econv_t * rb_econv_open(const char *source_encoding, const char *destination_encoding, int ecflags)
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void rb_str_set_len(VALUE, long)
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#define FALSE
Definition: nkf.h:174
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int atoi(const char *__nptr)
arg
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#define fix_string_encoding(str, encoding)
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void rb_econv_close(rb_econv_t *ec)
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int rb_usascii_encindex(void)
Definition: encoding.c:1346
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void rb_exc_raise(VALUE mesg)
Raises an exception in the current thread.
Definition: eval.c:668
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#define rb_syserr_fail_path(err, path)
Definition: internal.h:1631
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ST_CONTINUE
@ ST_CONTINUE
Definition: st.h:99
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Definition: file.c:693
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Definition: win32.c:540
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Definition: rb_mjit_min_header-2.7.2.h:7336
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_ssize_t ssize_t
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