freshlybakedca.ke
Git fork
1#define USE_THE_REPOSITORY_VARIABLE
2#define DISABLE_SIGN_COMPARE_WARNINGS
3
4#include "git-compat-util.h"
5#include "abspath.h"
6#include "alloc.h"
7#include "config.h"
8#include "dir.h"
9#include "environment.h"
10#include "gettext.h"
11#include "run-command.h"
12#include "strbuf.h"
13#include "symlinks.h"
14#include "trace2.h"
15#include "win32.h"
16#include "win32/lazyload.h"
17#include "wrapper.h"
18#include <aclapi.h>
19#include <conio.h>
20#include <sddl.h>
21#define SECURITY_WIN32
22#include <sspi.h>
23#include <wchar.h>
24#include <winternl.h>
25
26#define STATUS_DELETE_PENDING ((NTSTATUS) 0xC0000056)
27
28#define HCAST(type, handle) ((type)(intptr_t)handle)
29
30static const int delay[] = { 0, 1, 10, 20, 40 };
31
32void open_in_gdb(void)
33{
34 static struct child_process cp = CHILD_PROCESS_INIT;
35
36 strvec_pushl(&cp.args, "mintty", "gdb", NULL);
37 strvec_pushf(&cp.args, "--pid=%d", getpid());
38 cp.clean_on_exit = 1;
39 if (start_command(&cp) < 0)
40 die_errno("Could not start gdb");
41 sleep(1);
42}
43
44int err_win_to_posix(DWORD winerr)
45{
46 int error = ENOSYS;
47 switch(winerr) {
48 case ERROR_ACCESS_DENIED: error = EACCES; break;
49 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
50 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
51 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
52 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
53 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
54 case ERROR_BAD_COMMAND: error = EIO; break;
55 case ERROR_BAD_DEVICE: error = ENODEV; break;
56 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
57 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
58 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
59 case ERROR_BAD_LENGTH: error = EINVAL; break;
60 case ERROR_BAD_PATHNAME: error = ENOENT; break;
61 case ERROR_BAD_PIPE: error = EPIPE; break;
62 case ERROR_BAD_UNIT: error = ENODEV; break;
63 case ERROR_BAD_USERNAME: error = EINVAL; break;
64 case ERROR_BROKEN_PIPE: error = EPIPE; break;
65 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
66 case ERROR_BUSY: error = EBUSY; break;
67 case ERROR_BUSY_DRIVE: error = EBUSY; break;
68 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
69 case ERROR_CANNOT_MAKE: error = EACCES; break;
70 case ERROR_CANTOPEN: error = EIO; break;
71 case ERROR_CANTREAD: error = EIO; break;
72 case ERROR_CANTWRITE: error = EIO; break;
73 case ERROR_CRC: error = EIO; break;
74 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
75 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
76 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
77 case ERROR_DIRECTORY: error = EINVAL; break;
78 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
79 case ERROR_DISK_CHANGE: error = EIO; break;
80 case ERROR_DISK_FULL: error = ENOSPC; break;
81 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
82 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
83 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
84 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
85 case ERROR_FILE_EXISTS: error = EEXIST; break;
86 case ERROR_FILE_INVALID: error = ENODEV; break;
87 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
88 case ERROR_GEN_FAILURE: error = EIO; break;
89 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
90 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
91 case ERROR_INVALID_ACCESS: error = EACCES; break;
92 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
93 case ERROR_INVALID_BLOCK: error = EFAULT; break;
94 case ERROR_INVALID_DATA: error = EINVAL; break;
95 case ERROR_INVALID_DRIVE: error = ENODEV; break;
96 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
97 case ERROR_INVALID_FLAGS: error = EINVAL; break;
98 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
99 case ERROR_INVALID_HANDLE: error = EBADF; break;
100 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
101 case ERROR_INVALID_NAME: error = EINVAL; break;
102 case ERROR_INVALID_OWNER: error = EINVAL; break;
103 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
104 case ERROR_INVALID_PASSWORD: error = EPERM; break;
105 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
106 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
107 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
108 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
109 case ERROR_IO_DEVICE: error = EIO; break;
110 case ERROR_IO_INCOMPLETE: error = EINTR; break;
111 case ERROR_LOCKED: error = EBUSY; break;
112 case ERROR_LOCK_VIOLATION: error = EACCES; break;
113 case ERROR_LOGON_FAILURE: error = EACCES; break;
114 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
115 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
116 case ERROR_MORE_DATA: error = EPIPE; break;
117 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
118 case ERROR_NOACCESS: error = EFAULT; break;
119 case ERROR_NONE_MAPPED: error = EINVAL; break;
120 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
121 case ERROR_NOT_READY: error = EAGAIN; break;
122 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
123 case ERROR_NO_DATA: error = EPIPE; break;
124 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
125 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
126 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
127 case ERROR_OPEN_FAILED: error = EIO; break;
128 case ERROR_OPEN_FILES: error = EBUSY; break;
129 case ERROR_OPERATION_ABORTED: error = EINTR; break;
130 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
131 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
132 case ERROR_PATH_BUSY: error = EBUSY; break;
133 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
134 case ERROR_PIPE_BUSY: error = EBUSY; break;
135 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
136 case ERROR_PIPE_LISTENING: error = EPIPE; break;
137 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
138 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
139 case ERROR_READ_FAULT: error = EIO; break;
140 case ERROR_SEEK: error = EIO; break;
141 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
142 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
143 case ERROR_SHARING_VIOLATION: error = EACCES; break;
144 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
145 case ERROR_SUCCESS: BUG("err_win_to_posix() called without an error!");
146 case ERROR_SWAPERROR: error = ENOENT; break;
147 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
148 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
149 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
150 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
151 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
152 case ERROR_WRITE_FAULT: error = EIO; break;
153 case ERROR_WRITE_PROTECT: error = EROFS; break;
154 }
155 return error;
156}
157
158static inline int is_file_in_use_error(DWORD errcode)
159{
160 switch (errcode) {
161 case ERROR_SHARING_VIOLATION:
162 case ERROR_ACCESS_DENIED:
163 return 1;
164 }
165
166 return 0;
167}
168
169static int read_yes_no_answer(void)
170{
171 char answer[1024];
172
173 if (fgets(answer, sizeof(answer), stdin)) {
174 size_t answer_len = strlen(answer);
175 int got_full_line = 0, c;
176
177 /* remove the newline */
178 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
179 answer[answer_len-2] = '\0';
180 got_full_line = 1;
181 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
182 answer[answer_len-1] = '\0';
183 got_full_line = 1;
184 }
185 /* flush the buffer in case we did not get the full line */
186 if (!got_full_line)
187 while ((c = getchar()) != EOF && c != '\n')
188 ;
189 } else
190 /* we could not read, return the
191 * default answer which is no */
192 return 0;
193
194 if (tolower(answer[0]) == 'y' && !answer[1])
195 return 1;
196 if (!strncasecmp(answer, "yes", sizeof(answer)))
197 return 1;
198 if (tolower(answer[0]) == 'n' && !answer[1])
199 return 0;
200 if (!strncasecmp(answer, "no", sizeof(answer)))
201 return 0;
202
203 /* did not find an answer we understand */
204 return -1;
205}
206
207static int ask_yes_no_if_possible(const char *format, ...)
208{
209 char question[4096];
210 const char *retry_hook;
211 va_list args;
212
213 va_start(args, format);
214 vsnprintf(question, sizeof(question), format, args);
215 va_end(args);
216
217 retry_hook = mingw_getenv("GIT_ASK_YESNO");
218 if (retry_hook) {
219 struct child_process cmd = CHILD_PROCESS_INIT;
220
221 strvec_pushl(&cmd.args, retry_hook, question, NULL);
222 return !run_command(&cmd);
223 }
224
225 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
226 return 0;
227
228 while (1) {
229 int answer;
230 fprintf(stderr, "%s (y/n) ", question);
231
232 if ((answer = read_yes_no_answer()) >= 0)
233 return answer;
234
235 fprintf(stderr, "Sorry, I did not understand your answer. "
236 "Please type 'y' or 'n'\n");
237 }
238}
239
240/* Windows only */
241enum hide_dotfiles_type {
242 HIDE_DOTFILES_FALSE = 0,
243 HIDE_DOTFILES_TRUE,
244 HIDE_DOTFILES_DOTGITONLY
245};
246
247static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
248static char *unset_environment_variables;
249
250int mingw_core_config(const char *var, const char *value,
251 const struct config_context *ctx UNUSED,
252 void *cb UNUSED)
253{
254 if (!strcmp(var, "core.hidedotfiles")) {
255 if (value && !strcasecmp(value, "dotgitonly"))
256 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
257 else
258 hide_dotfiles = git_config_bool(var, value);
259 return 0;
260 }
261
262 if (!strcmp(var, "core.unsetenvvars")) {
263 if (!value)
264 return config_error_nonbool(var);
265 free(unset_environment_variables);
266 unset_environment_variables = xstrdup(value);
267 return 0;
268 }
269
270 return 0;
271}
272
273/* Normalizes NT paths as returned by some low-level APIs. */
274static wchar_t *normalize_ntpath(wchar_t *wbuf)
275{
276 int i;
277 /* fix absolute path prefixes */
278 if (wbuf[0] == '\\') {
279 /* strip NT namespace prefixes */
280 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
281 !wcsncmp(wbuf, L"\\\\?\\", 4))
282 wbuf += 4;
283 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
284 wbuf += 12;
285 /* replace remaining '...UNC\' with '\\' */
286 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
287 wbuf += 2;
288 *wbuf = '\\';
289 }
290 }
291 /* convert backslashes to slashes */
292 for (i = 0; wbuf[i]; i++)
293 if (wbuf[i] == '\\')
294 wbuf[i] = '/';
295 return wbuf;
296}
297
298int mingw_unlink(const char *pathname, int handle_in_use_error)
299{
300 int ret, tries = 0;
301 wchar_t wpathname[MAX_PATH];
302 if (xutftowcs_path(wpathname, pathname) < 0)
303 return -1;
304
305 if (DeleteFileW(wpathname))
306 return 0;
307
308 /* read-only files cannot be removed */
309 _wchmod(wpathname, 0666);
310 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
311 if (!is_file_in_use_error(GetLastError()))
312 break;
313 if (!handle_in_use_error)
314 return ret;
315
316 /*
317 * We assume that some other process had the source or
318 * destination file open at the wrong moment and retry.
319 * In order to give the other process a higher chance to
320 * complete its operation, we give up our time slice now.
321 * If we have to retry again, we do sleep a bit.
322 */
323 Sleep(delay[tries]);
324 tries++;
325 }
326 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
327 ask_yes_no_if_possible("Unlink of file '%s' failed. "
328 "Should I try again?", pathname))
329 ret = _wunlink(wpathname);
330 return ret;
331}
332
333static int is_dir_empty(const wchar_t *wpath)
334{
335 WIN32_FIND_DATAW findbuf;
336 HANDLE handle;
337 wchar_t wbuf[MAX_PATH + 2];
338 wcscpy(wbuf, wpath);
339 wcscat(wbuf, L"\\*");
340 handle = FindFirstFileW(wbuf, &findbuf);
341 if (handle == INVALID_HANDLE_VALUE)
342 return GetLastError() == ERROR_NO_MORE_FILES;
343
344 while (!wcscmp(findbuf.cFileName, L".") ||
345 !wcscmp(findbuf.cFileName, L".."))
346 if (!FindNextFileW(handle, &findbuf)) {
347 DWORD err = GetLastError();
348 FindClose(handle);
349 return err == ERROR_NO_MORE_FILES;
350 }
351 FindClose(handle);
352 return 0;
353}
354
355int mingw_rmdir(const char *pathname)
356{
357 int ret, tries = 0;
358 wchar_t wpathname[MAX_PATH];
359 struct stat st;
360
361 /*
362 * Contrary to Linux' `rmdir()`, Windows' _wrmdir() and _rmdir()
363 * (and `RemoveDirectoryW()`) will attempt to remove the target of a
364 * symbolic link (if it points to a directory).
365 *
366 * This behavior breaks the assumption of e.g. `remove_path()` which
367 * upon successful deletion of a file will attempt to remove its parent
368 * directories recursively until failure (which usually happens when
369 * the directory is not empty).
370 *
371 * Therefore, before calling `_wrmdir()`, we first check if the path is
372 * a symbolic link. If it is, we exit and return the same error as
373 * Linux' `rmdir()` would, i.e. `ENOTDIR`.
374 */
375 if (!mingw_lstat(pathname, &st) && S_ISLNK(st.st_mode)) {
376 errno = ENOTDIR;
377 return -1;
378 }
379
380 if (xutftowcs_path(wpathname, pathname) < 0)
381 return -1;
382
383 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
384 if (!is_file_in_use_error(GetLastError()))
385 errno = err_win_to_posix(GetLastError());
386 if (errno != EACCES)
387 break;
388 if (!is_dir_empty(wpathname)) {
389 errno = ENOTEMPTY;
390 break;
391 }
392 /*
393 * We assume that some other process had the source or
394 * destination file open at the wrong moment and retry.
395 * In order to give the other process a higher chance to
396 * complete its operation, we give up our time slice now.
397 * If we have to retry again, we do sleep a bit.
398 */
399 Sleep(delay[tries]);
400 tries++;
401 }
402 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
403 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
404 "Should I try again?", pathname))
405 ret = _wrmdir(wpathname);
406 if (!ret)
407 invalidate_lstat_cache();
408 return ret;
409}
410
411static inline int needs_hiding(const char *path)
412{
413 const char *basename;
414
415 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
416 return 0;
417
418 /* We cannot use basename(), as it would remove trailing slashes */
419 win32_skip_dos_drive_prefix((char **)&path);
420 if (!*path)
421 return 0;
422
423 for (basename = path; *path; path++)
424 if (is_dir_sep(*path)) {
425 do {
426 path++;
427 } while (is_dir_sep(*path));
428 /* ignore trailing slashes */
429 if (*path)
430 basename = path;
431 else
432 break;
433 }
434
435 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
436 return *basename == '.';
437
438 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
439 return !strncasecmp(".git", basename, 4) &&
440 (!basename[4] || is_dir_sep(basename[4]));
441}
442
443static int set_hidden_flag(const wchar_t *path, int set)
444{
445 DWORD original = GetFileAttributesW(path), modified;
446 if (set)
447 modified = original | FILE_ATTRIBUTE_HIDDEN;
448 else
449 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
450 if (original == modified || SetFileAttributesW(path, modified))
451 return 0;
452 errno = err_win_to_posix(GetLastError());
453 return -1;
454}
455
456int mingw_mkdir(const char *path, int mode UNUSED)
457{
458 int ret;
459 wchar_t wpath[MAX_PATH];
460
461 if (!is_valid_win32_path(path, 0)) {
462 errno = EINVAL;
463 return -1;
464 }
465
466 if (xutftowcs_path(wpath, path) < 0)
467 return -1;
468 ret = _wmkdir(wpath);
469 if (!ret && needs_hiding(path))
470 return set_hidden_flag(wpath, 1);
471 return ret;
472}
473
474/*
475 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
476 * is documented in [1] as opening a writable file handle in append mode.
477 * (It is believed that) this is atomic since it is maintained by the
478 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
479 *
480 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
481 *
482 * This trick does not appear to work for named pipes. Instead it creates
483 * a named pipe client handle that cannot be written to. Callers should
484 * just use the regular _wopen() for them. (And since client handle gets
485 * bound to a unique server handle, it isn't really an issue.)
486 */
487static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
488{
489 HANDLE handle;
490 int fd;
491 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
492
493 /* only these flags are supported */
494 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
495 return errno = ENOSYS, -1;
496
497 /*
498 * FILE_SHARE_WRITE is required to permit child processes
499 * to append to the file.
500 */
501 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
502 FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE,
503 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
504 if (handle == INVALID_HANDLE_VALUE) {
505 DWORD err = GetLastError();
506
507 /*
508 * Some network storage solutions (e.g. Isilon) might return
509 * ERROR_INVALID_PARAMETER instead of expected error
510 * ERROR_PATH_NOT_FOUND, which results in an unknown error. If
511 * so, let's turn the error to ERROR_PATH_NOT_FOUND instead.
512 */
513 if (err == ERROR_INVALID_PARAMETER)
514 err = ERROR_PATH_NOT_FOUND;
515
516 errno = err_win_to_posix(err);
517 return -1;
518 }
519
520 /*
521 * No O_APPEND here, because the CRT uses it only to reset the
522 * file pointer to EOF before each write(); but that is not
523 * necessary (and may lead to races) for a file created with
524 * FILE_APPEND_DATA.
525 */
526 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
527 if (fd < 0)
528 CloseHandle(handle);
529 return fd;
530}
531
532/*
533 * Ideally, we'd use `_wopen()` to implement this functionality so that we
534 * don't have to reimplement it, but unfortunately we do not have tight control
535 * over the share mode there. And while `_wsopen()` and friends exist that give
536 * us _some_ control over the share mode, this family of functions doesn't give
537 * us the ability to enable FILE_SHARE_DELETE, either. But this is a strict
538 * requirement for us though so that we can unlink or rename over files that
539 * are held open by another process.
540 *
541 * We are thus forced to implement our own emulation of `open()`. To make our
542 * life simpler we only implement basic support for this, namely opening
543 * existing files for reading and/or writing. This means that newly created
544 * files won't have their sharing mode set up correctly, but for now I couldn't
545 * find any case where this matters. We may have to revisit that in the future
546 * though based on our needs.
547 */
548static int mingw_open_existing(const wchar_t *filename, int oflags, ...)
549{
550 SECURITY_ATTRIBUTES security_attributes = {
551 .nLength = sizeof(security_attributes),
552 .bInheritHandle = !(oflags & O_NOINHERIT),
553 };
554 HANDLE handle;
555 DWORD access;
556 int fd;
557
558 /* We only support basic flags. */
559 if (oflags & ~(O_ACCMODE | O_NOINHERIT)) {
560 errno = ENOSYS;
561 return -1;
562 }
563
564 switch (oflags & O_ACCMODE) {
565 case O_RDWR:
566 access = GENERIC_READ | GENERIC_WRITE;
567 break;
568 case O_WRONLY:
569 access = GENERIC_WRITE;
570 break;
571 default:
572 access = GENERIC_READ;
573 break;
574 }
575
576 handle = CreateFileW(filename, access,
577 FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE,
578 &security_attributes, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
579 if (handle == INVALID_HANDLE_VALUE) {
580 DWORD err = GetLastError();
581 if (err == ERROR_ACCESS_DENIED) {
582 DWORD attrs = GetFileAttributesW(filename);
583 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
584 handle = CreateFileW(filename, access,
585 FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE,
586 &security_attributes, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL| FILE_FLAG_BACKUP_SEMANTICS, NULL);
587 }
588
589 if (handle == INVALID_HANDLE_VALUE) {
590 err = GetLastError();
591
592 /* See `mingw_open_append()` for why we have this conversion. */
593 if (err == ERROR_INVALID_PARAMETER)
594 err = ERROR_PATH_NOT_FOUND;
595
596 errno = err_win_to_posix(err);
597 return -1;
598 }
599 }
600
601 fd = _open_osfhandle((intptr_t)handle, oflags | O_BINARY);
602 if (fd < 0)
603 CloseHandle(handle);
604 return fd;
605}
606
607/*
608 * Does the pathname map to the local named pipe filesystem?
609 * That is, does it have a "//./pipe/" prefix?
610 */
611static int is_local_named_pipe_path(const char *filename)
612{
613 return (is_dir_sep(filename[0]) &&
614 is_dir_sep(filename[1]) &&
615 filename[2] == '.' &&
616 is_dir_sep(filename[3]) &&
617 !strncasecmp(filename+4, "pipe", 4) &&
618 is_dir_sep(filename[8]) &&
619 filename[9]);
620}
621
622int mingw_open (const char *filename, int oflags, ...)
623{
624 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
625 va_list args;
626 unsigned mode;
627 int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
628 wchar_t wfilename[MAX_PATH];
629 open_fn_t open_fn;
630
631 DECLARE_PROC_ADDR(ntdll.dll, NTSTATUS, NTAPI, RtlGetLastNtStatus, void);
632
633 va_start(args, oflags);
634 mode = va_arg(args, int);
635 va_end(args);
636
637 if (!is_valid_win32_path(filename, !create)) {
638 errno = create ? EINVAL : ENOENT;
639 return -1;
640 }
641
642 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
643 open_fn = mingw_open_append;
644 else if (!(oflags & ~(O_ACCMODE | O_NOINHERIT)))
645 open_fn = mingw_open_existing;
646 else
647 open_fn = _wopen;
648
649 if (filename && !strcmp(filename, "/dev/null"))
650 wcscpy(wfilename, L"nul");
651 else if (xutftowcs_path(wfilename, filename) < 0)
652 return -1;
653
654 fd = open_fn(wfilename, oflags, mode);
655
656 /*
657 * Internally, `_wopen()` uses the `CreateFile()` API with CREATE_NEW,
658 * which may error out with ERROR_ACCESS_DENIED and an NtStatus of
659 * STATUS_DELETE_PENDING when the file is scheduled for deletion via
660 * `DeleteFileW()`. The file essentially exists, so we map errno to
661 * EEXIST instead of EACCESS so that callers don't have to special-case
662 * this.
663 *
664 * This fixes issues for example with the lockfile interface when one
665 * process has a lock that it is about to commit or release while
666 * another process wants to acquire it.
667 */
668 if (fd < 0 && create && GetLastError() == ERROR_ACCESS_DENIED &&
669 INIT_PROC_ADDR(RtlGetLastNtStatus) && RtlGetLastNtStatus() == STATUS_DELETE_PENDING)
670 errno = EEXIST;
671 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
672 DWORD attrs = GetFileAttributesW(wfilename);
673 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
674 errno = EISDIR;
675 }
676 if ((oflags & O_CREAT) && needs_hiding(filename)) {
677 /*
678 * Internally, _wopen() uses the CreateFile() API which errors
679 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
680 * specified and an already existing file's attributes do not
681 * match *exactly*. As there is no mode or flag we can set that
682 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
683 * again *without* the O_CREAT flag (that corresponds to the
684 * CREATE_ALWAYS flag of CreateFile()).
685 */
686 if (fd < 0 && errno == EACCES)
687 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
688 if (fd >= 0 && set_hidden_flag(wfilename, 1))
689 warning("could not mark '%s' as hidden.", filename);
690 }
691 return fd;
692}
693
694static BOOL WINAPI ctrl_ignore(DWORD type UNUSED)
695{
696 return TRUE;
697}
698
699#undef fgetc
700int mingw_fgetc(FILE *stream)
701{
702 int ch;
703 if (!isatty(_fileno(stream)))
704 return fgetc(stream);
705
706 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
707 while (1) {
708 ch = fgetc(stream);
709 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
710 break;
711
712 /* Ctrl+C was pressed, simulate SIGINT and retry */
713 mingw_raise(SIGINT);
714 }
715 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
716 return ch;
717}
718
719#undef fopen
720FILE *mingw_fopen (const char *filename, const char *otype)
721{
722 int hide = needs_hiding(filename);
723 FILE *file;
724 wchar_t wfilename[MAX_PATH], wotype[4];
725 if (filename && !strcmp(filename, "/dev/null"))
726 wcscpy(wfilename, L"nul");
727 else if (!is_valid_win32_path(filename, 1)) {
728 int create = otype && strchr(otype, 'w');
729 errno = create ? EINVAL : ENOENT;
730 return NULL;
731 } else if (xutftowcs_path(wfilename, filename) < 0)
732 return NULL;
733
734 if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
735 return NULL;
736
737 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
738 error("could not unhide %s", filename);
739 return NULL;
740 }
741 file = _wfopen(wfilename, wotype);
742 if (!file && GetLastError() == ERROR_INVALID_NAME)
743 errno = ENOENT;
744 if (file && hide && set_hidden_flag(wfilename, 1))
745 warning("could not mark '%s' as hidden.", filename);
746 return file;
747}
748
749FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
750{
751 int hide = needs_hiding(filename);
752 FILE *file;
753 wchar_t wfilename[MAX_PATH], wotype[4];
754 if (filename && !strcmp(filename, "/dev/null"))
755 wcscpy(wfilename, L"nul");
756 else if (!is_valid_win32_path(filename, 1)) {
757 int create = otype && strchr(otype, 'w');
758 errno = create ? EINVAL : ENOENT;
759 return NULL;
760 } else if (xutftowcs_path(wfilename, filename) < 0)
761 return NULL;
762
763 if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
764 return NULL;
765
766 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
767 error("could not unhide %s", filename);
768 return NULL;
769 }
770 file = _wfreopen(wfilename, wotype, stream);
771 if (file && hide && set_hidden_flag(wfilename, 1))
772 warning("could not mark '%s' as hidden.", filename);
773 return file;
774}
775
776#undef fflush
777int mingw_fflush(FILE *stream)
778{
779 int ret = fflush(stream);
780
781 /*
782 * write() is used behind the scenes of stdio output functions.
783 * Since git code does not check for errors after each stdio write
784 * operation, it can happen that write() is called by a later
785 * stdio function even if an earlier write() call failed. In the
786 * case of a pipe whose readable end was closed, only the first
787 * call to write() reports EPIPE on Windows. Subsequent write()
788 * calls report EINVAL. It is impossible to notice whether this
789 * fflush invocation triggered such a case, therefore, we have to
790 * catch all EINVAL errors whole-sale.
791 */
792 if (ret && errno == EINVAL)
793 errno = EPIPE;
794
795 return ret;
796}
797
798#undef write
799ssize_t mingw_write(int fd, const void *buf, size_t len)
800{
801 ssize_t result = write(fd, buf, len);
802
803 if (result < 0 && (errno == EINVAL || errno == ENOSPC) && buf) {
804 int orig = errno;
805
806 /* check if fd is a pipe */
807 HANDLE h = (HANDLE) _get_osfhandle(fd);
808 if (GetFileType(h) != FILE_TYPE_PIPE)
809 errno = orig;
810 else if (orig == EINVAL)
811 errno = EPIPE;
812 else {
813 DWORD buf_size;
814
815 if (!GetNamedPipeInfo(h, NULL, NULL, &buf_size, NULL))
816 buf_size = 4096;
817 if (len > buf_size)
818 return write(fd, buf, buf_size);
819 errno = orig;
820 }
821 }
822
823 return result;
824}
825
826int mingw_access(const char *filename, int mode)
827{
828 wchar_t wfilename[MAX_PATH];
829 if (!strcmp("nul", filename) || !strcmp("/dev/null", filename))
830 return 0;
831 if (xutftowcs_path(wfilename, filename) < 0)
832 return -1;
833 /* X_OK is not supported by the MSVCRT version */
834 return _waccess(wfilename, mode & ~X_OK);
835}
836
837int mingw_chdir(const char *dirname)
838{
839 wchar_t wdirname[MAX_PATH];
840 if (xutftowcs_path(wdirname, dirname) < 0)
841 return -1;
842 return _wchdir(wdirname);
843}
844
845int mingw_chmod(const char *filename, int mode)
846{
847 wchar_t wfilename[MAX_PATH];
848 if (xutftowcs_path(wfilename, filename) < 0)
849 return -1;
850 return _wchmod(wfilename, mode);
851}
852
853/*
854 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
855 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
856 */
857static inline long long filetime_to_hnsec(const FILETIME *ft)
858{
859 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
860 /* Windows to Unix Epoch conversion */
861 return winTime - 116444736000000000LL;
862}
863
864static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts)
865{
866 long long hnsec = filetime_to_hnsec(ft);
867 ts->tv_sec = (time_t)(hnsec / 10000000);
868 ts->tv_nsec = (hnsec % 10000000) * 100;
869}
870
871/**
872 * Verifies that safe_create_leading_directories() would succeed.
873 */
874static int has_valid_directory_prefix(wchar_t *wfilename)
875{
876 size_t n = wcslen(wfilename);
877
878 while (n > 0) {
879 wchar_t c = wfilename[--n];
880 DWORD attributes;
881
882 if (!is_dir_sep(c))
883 continue;
884
885 wfilename[n] = L'\0';
886 attributes = GetFileAttributesW(wfilename);
887 wfilename[n] = c;
888 if (attributes &
889 (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))
890 return 1;
891 if (attributes == INVALID_FILE_ATTRIBUTES)
892 switch (GetLastError()) {
893 case ERROR_PATH_NOT_FOUND:
894 continue;
895 case ERROR_FILE_NOT_FOUND:
896 /* This implies parent directory exists. */
897 return 1;
898 }
899 return 0;
900 }
901 return 1;
902}
903
904/* We keep the do_lstat code in a separate function to avoid recursion.
905 * When a path ends with a slash, the stat will fail with ENOENT. In
906 * this case, we strip the trailing slashes and stat again.
907 *
908 * If follow is true then act like stat() and report on the link
909 * target. Otherwise report on the link itself.
910 */
911static int do_lstat(int follow, const char *file_name, struct stat *buf)
912{
913 WIN32_FILE_ATTRIBUTE_DATA fdata;
914 wchar_t wfilename[MAX_PATH];
915 if (xutftowcs_path(wfilename, file_name) < 0)
916 return -1;
917
918 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
919 buf->st_ino = 0;
920 buf->st_gid = 0;
921 buf->st_uid = 0;
922 buf->st_nlink = 1;
923 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
924 buf->st_size = fdata.nFileSizeLow |
925 (((off_t)fdata.nFileSizeHigh)<<32);
926 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
927 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
928 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
929 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
930 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
931 WIN32_FIND_DATAW findbuf;
932 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
933 if (handle != INVALID_HANDLE_VALUE) {
934 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
935 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
936 if (follow) {
937 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
938 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
939 } else {
940 buf->st_mode = S_IFLNK;
941 }
942 buf->st_mode |= S_IREAD;
943 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
944 buf->st_mode |= S_IWRITE;
945 }
946 FindClose(handle);
947 }
948 }
949 return 0;
950 }
951 switch (GetLastError()) {
952 case ERROR_ACCESS_DENIED:
953 case ERROR_SHARING_VIOLATION:
954 case ERROR_LOCK_VIOLATION:
955 case ERROR_SHARING_BUFFER_EXCEEDED:
956 errno = EACCES;
957 break;
958 case ERROR_BUFFER_OVERFLOW:
959 errno = ENAMETOOLONG;
960 break;
961 case ERROR_NOT_ENOUGH_MEMORY:
962 errno = ENOMEM;
963 break;
964 case ERROR_PATH_NOT_FOUND:
965 if (!has_valid_directory_prefix(wfilename)) {
966 errno = ENOTDIR;
967 break;
968 }
969 /* fallthru */
970 default:
971 errno = ENOENT;
972 break;
973 }
974 return -1;
975}
976
977/* We provide our own lstat/fstat functions, since the provided
978 * lstat/fstat functions are so slow. These stat functions are
979 * tailored for Git's usage (read: fast), and are not meant to be
980 * complete. Note that Git stat()s are redirected to mingw_lstat()
981 * too, since Windows doesn't really handle symlinks that well.
982 */
983static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
984{
985 size_t namelen;
986 char alt_name[PATH_MAX];
987
988 if (!do_lstat(follow, file_name, buf))
989 return 0;
990
991 /* if file_name ended in a '/', Windows returned ENOENT;
992 * try again without trailing slashes
993 */
994 if (errno != ENOENT)
995 return -1;
996
997 namelen = strlen(file_name);
998 if (namelen && file_name[namelen-1] != '/')
999 return -1;
1000 while (namelen && file_name[namelen-1] == '/')
1001 --namelen;
1002 if (!namelen || namelen >= PATH_MAX)
1003 return -1;
1004
1005 memcpy(alt_name, file_name, namelen);
1006 alt_name[namelen] = 0;
1007 return do_lstat(follow, alt_name, buf);
1008}
1009
1010static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
1011{
1012 BY_HANDLE_FILE_INFORMATION fdata;
1013
1014 if (!GetFileInformationByHandle(hnd, &fdata)) {
1015 errno = err_win_to_posix(GetLastError());
1016 return -1;
1017 }
1018
1019 buf->st_ino = 0;
1020 buf->st_gid = 0;
1021 buf->st_uid = 0;
1022 buf->st_nlink = 1;
1023 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1024 buf->st_size = fdata.nFileSizeLow |
1025 (((off_t)fdata.nFileSizeHigh)<<32);
1026 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
1027 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
1028 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
1029 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
1030 return 0;
1031}
1032
1033int mingw_lstat(const char *file_name, struct stat *buf)
1034{
1035 return do_stat_internal(0, file_name, buf);
1036}
1037int mingw_stat(const char *file_name, struct stat *buf)
1038{
1039 return do_stat_internal(1, file_name, buf);
1040}
1041
1042int mingw_fstat(int fd, struct stat *buf)
1043{
1044 HANDLE fh = (HANDLE)_get_osfhandle(fd);
1045 DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
1046
1047 switch (type) {
1048 case FILE_TYPE_DISK:
1049 return get_file_info_by_handle(fh, buf);
1050
1051 case FILE_TYPE_CHAR:
1052 case FILE_TYPE_PIPE:
1053 /* initialize stat fields */
1054 memset(buf, 0, sizeof(*buf));
1055 buf->st_nlink = 1;
1056
1057 if (type == FILE_TYPE_CHAR) {
1058 buf->st_mode = _S_IFCHR;
1059 } else {
1060 buf->st_mode = _S_IFIFO;
1061 if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
1062 buf->st_size = avail;
1063 }
1064 return 0;
1065
1066 default:
1067 errno = EBADF;
1068 return -1;
1069 }
1070}
1071
1072static inline void time_t_to_filetime(time_t t, FILETIME *ft)
1073{
1074 long long winTime = t * 10000000LL + 116444736000000000LL;
1075 ft->dwLowDateTime = winTime;
1076 ft->dwHighDateTime = winTime >> 32;
1077}
1078
1079int mingw_utime (const char *file_name, const struct utimbuf *times)
1080{
1081 FILETIME mft, aft;
1082 int rc;
1083 DWORD attrs;
1084 wchar_t wfilename[MAX_PATH];
1085 HANDLE osfilehandle;
1086
1087 if (xutftowcs_path(wfilename, file_name) < 0)
1088 return -1;
1089
1090 /* must have write permission */
1091 attrs = GetFileAttributesW(wfilename);
1092 if (attrs != INVALID_FILE_ATTRIBUTES &&
1093 (attrs & FILE_ATTRIBUTE_READONLY)) {
1094 /* ignore errors here; open() will report them */
1095 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
1096 }
1097
1098 osfilehandle = CreateFileW(wfilename,
1099 FILE_WRITE_ATTRIBUTES,
1100 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
1101 NULL,
1102 OPEN_EXISTING,
1103 (attrs != INVALID_FILE_ATTRIBUTES &&
1104 (attrs & FILE_ATTRIBUTE_DIRECTORY)) ?
1105 FILE_FLAG_BACKUP_SEMANTICS : 0,
1106 NULL);
1107 if (osfilehandle == INVALID_HANDLE_VALUE) {
1108 errno = err_win_to_posix(GetLastError());
1109 rc = -1;
1110 goto revert_attrs;
1111 }
1112
1113 if (times) {
1114 time_t_to_filetime(times->modtime, &mft);
1115 time_t_to_filetime(times->actime, &aft);
1116 } else {
1117 GetSystemTimeAsFileTime(&mft);
1118 aft = mft;
1119 }
1120
1121 if (!SetFileTime(osfilehandle, NULL, &aft, &mft)) {
1122 errno = EINVAL;
1123 rc = -1;
1124 } else
1125 rc = 0;
1126
1127 if (osfilehandle != INVALID_HANDLE_VALUE)
1128 CloseHandle(osfilehandle);
1129
1130revert_attrs:
1131 if (attrs != INVALID_FILE_ATTRIBUTES &&
1132 (attrs & FILE_ATTRIBUTE_READONLY)) {
1133 /* ignore errors again */
1134 SetFileAttributesW(wfilename, attrs);
1135 }
1136 return rc;
1137}
1138
1139#undef strftime
1140size_t mingw_strftime(char *s, size_t max,
1141 const char *format, const struct tm *tm)
1142{
1143 /* a pointer to the original strftime in case we can't find the UCRT version */
1144 static size_t (*fallback)(char *, size_t, const char *, const struct tm *) = strftime;
1145 size_t ret;
1146 DECLARE_PROC_ADDR(ucrtbase.dll, size_t, __cdecl, strftime, char *, size_t,
1147 const char *, const struct tm *);
1148
1149 if (INIT_PROC_ADDR(strftime))
1150 ret = strftime(s, max, format, tm);
1151 else
1152 ret = fallback(s, max, format, tm);
1153
1154 if (!ret && errno == EINVAL)
1155 die("invalid strftime format: '%s'", format);
1156 return ret;
1157}
1158
1159unsigned int sleep (unsigned int seconds)
1160{
1161 Sleep(seconds*1000);
1162 return 0;
1163}
1164
1165char *mingw_mktemp(char *template)
1166{
1167 wchar_t wtemplate[MAX_PATH];
1168 if (xutftowcs_path(wtemplate, template) < 0)
1169 return NULL;
1170 if (!_wmktemp(wtemplate))
1171 return NULL;
1172 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
1173 return NULL;
1174 return template;
1175}
1176
1177int mkstemp(char *template)
1178{
1179 return git_mkstemp_mode(template, 0600);
1180}
1181
1182int gettimeofday(struct timeval *tv, void *tz UNUSED)
1183{
1184 FILETIME ft;
1185 long long hnsec;
1186
1187 GetSystemTimeAsFileTime(&ft);
1188 hnsec = filetime_to_hnsec(&ft);
1189 tv->tv_sec = hnsec / 10000000;
1190 tv->tv_usec = (hnsec % 10000000) / 10;
1191 return 0;
1192}
1193
1194int pipe(int filedes[2])
1195{
1196 HANDLE h[2];
1197
1198 /* this creates non-inheritable handles */
1199 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
1200 errno = err_win_to_posix(GetLastError());
1201 return -1;
1202 }
1203 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
1204 if (filedes[0] < 0) {
1205 CloseHandle(h[0]);
1206 CloseHandle(h[1]);
1207 return -1;
1208 }
1209 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
1210 if (filedes[1] < 0) {
1211 close(filedes[0]);
1212 CloseHandle(h[1]);
1213 return -1;
1214 }
1215 return 0;
1216}
1217
1218#ifndef __MINGW64__
1219struct tm *gmtime_r(const time_t *timep, struct tm *result)
1220{
1221 if (gmtime_s(result, timep) == 0)
1222 return result;
1223 return NULL;
1224}
1225
1226struct tm *localtime_r(const time_t *timep, struct tm *result)
1227{
1228 if (localtime_s(result, timep) == 0)
1229 return result;
1230 return NULL;
1231}
1232#endif
1233
1234char *mingw_getcwd(char *pointer, int len)
1235{
1236 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
1237 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
1238
1239 if (!ret || ret >= ARRAY_SIZE(cwd)) {
1240 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
1241 return NULL;
1242 }
1243 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
1244 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
1245 HANDLE hnd = CreateFileW(cwd, 0,
1246 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
1247 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
1248 if (hnd == INVALID_HANDLE_VALUE)
1249 return NULL;
1250 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
1251 CloseHandle(hnd);
1252 if (!ret || ret >= ARRAY_SIZE(wpointer))
1253 return NULL;
1254 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
1255 return NULL;
1256 return pointer;
1257 }
1258 if (!ret || ret >= ARRAY_SIZE(wpointer))
1259 return NULL;
1260 if (GetFileAttributesW(wpointer) == INVALID_FILE_ATTRIBUTES) {
1261 errno = ENOENT;
1262 return NULL;
1263 }
1264 if (xwcstoutf(pointer, wpointer, len) < 0)
1265 return NULL;
1266 convert_slashes(pointer);
1267 return pointer;
1268}
1269
1270/*
1271 * See "Parsing C++ Command-Line Arguments" at Microsoft's Docs:
1272 * https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments
1273 */
1274static const char *quote_arg_msvc(const char *arg)
1275{
1276 /* count chars to quote */
1277 int len = 0, n = 0;
1278 int force_quotes = 0;
1279 char *q, *d;
1280 const char *p = arg;
1281 if (!*p) force_quotes = 1;
1282 while (*p) {
1283 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
1284 force_quotes = 1;
1285 else if (*p == '"')
1286 n++;
1287 else if (*p == '\\') {
1288 int count = 0;
1289 while (*p == '\\') {
1290 count++;
1291 p++;
1292 len++;
1293 }
1294 if (*p == '"' || !*p)
1295 n += count*2 + 1;
1296 continue;
1297 }
1298 len++;
1299 p++;
1300 }
1301 if (!force_quotes && n == 0)
1302 return arg;
1303
1304 /* insert \ where necessary */
1305 d = q = xmalloc(st_add3(len, n, 3));
1306 *d++ = '"';
1307 while (*arg) {
1308 if (*arg == '"')
1309 *d++ = '\\';
1310 else if (*arg == '\\') {
1311 int count = 0;
1312 while (*arg == '\\') {
1313 count++;
1314 *d++ = *arg++;
1315 }
1316 if (*arg == '"' || !*arg) {
1317 while (count-- > 0)
1318 *d++ = '\\';
1319 /* don't escape the surrounding end quote */
1320 if (!*arg)
1321 break;
1322 *d++ = '\\';
1323 }
1324 }
1325 *d++ = *arg++;
1326 }
1327 *d++ = '"';
1328 *d++ = '\0';
1329 return q;
1330}
1331
1332#include "quote.h"
1333
1334static const char *quote_arg_msys2(const char *arg)
1335{
1336 struct strbuf buf = STRBUF_INIT;
1337 const char *p2 = arg, *p;
1338
1339 for (p = arg; *p; p++) {
1340 int ws = isspace(*p);
1341 if (!ws && *p != '\\' && *p != '"' && *p != '{' && *p != '\'' &&
1342 *p != '?' && *p != '*' && *p != '~')
1343 continue;
1344 if (!buf.len)
1345 strbuf_addch(&buf, '"');
1346 if (p != p2)
1347 strbuf_add(&buf, p2, p - p2);
1348 if (*p == '\\' || *p == '"')
1349 strbuf_addch(&buf, '\\');
1350 p2 = p;
1351 }
1352
1353 if (p == arg)
1354 strbuf_addch(&buf, '"');
1355 else if (!buf.len)
1356 return arg;
1357 else
1358 strbuf_add(&buf, p2, p - p2);
1359
1360 strbuf_addch(&buf, '"');
1361 return strbuf_detach(&buf, 0);
1362}
1363
1364static const char *parse_interpreter(const char *cmd)
1365{
1366 static char buf[100];
1367 char *p, *opt;
1368 ssize_t n; /* read() can return negative values */
1369 int fd;
1370
1371 /* don't even try a .exe */
1372 n = strlen(cmd);
1373 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1374 return NULL;
1375
1376 fd = open(cmd, O_RDONLY);
1377 if (fd < 0)
1378 return NULL;
1379 n = read(fd, buf, sizeof(buf)-1);
1380 close(fd);
1381 if (n < 4) /* at least '#!/x' and not error */
1382 return NULL;
1383
1384 if (buf[0] != '#' || buf[1] != '!')
1385 return NULL;
1386 buf[n] = '\0';
1387 p = buf + strcspn(buf, "\r\n");
1388 if (!*p)
1389 return NULL;
1390
1391 *p = '\0';
1392 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1393 return NULL;
1394 /* strip options */
1395 if ((opt = strchr(p+1, ' ')))
1396 *opt = '\0';
1397 return p+1;
1398}
1399
1400/*
1401 * exe_only means that we only want to detect .exe files, but not scripts
1402 * (which do not have an extension)
1403 */
1404static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1405 int isexe, int exe_only)
1406{
1407 char path[MAX_PATH];
1408 wchar_t wpath[MAX_PATH];
1409 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1410
1411 if (xutftowcs_path(wpath, path) < 0)
1412 return NULL;
1413
1414 if (!isexe && _waccess(wpath, F_OK) == 0)
1415 return xstrdup(path);
1416 wpath[wcslen(wpath)-4] = '\0';
1417 if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
1418 if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY)) {
1419 path[strlen(path)-4] = '\0';
1420 return xstrdup(path);
1421 }
1422 }
1423 return NULL;
1424}
1425
1426/*
1427 * Determines the absolute path of cmd using the split path in path.
1428 * If cmd contains a slash or backslash, no lookup is performed.
1429 */
1430static char *path_lookup(const char *cmd, int exe_only)
1431{
1432 const char *path;
1433 char *prog = NULL;
1434 size_t len = strlen(cmd);
1435 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1436
1437 if (strpbrk(cmd, "/\\"))
1438 return xstrdup(cmd);
1439
1440 path = mingw_getenv("PATH");
1441 if (!path)
1442 return NULL;
1443
1444 while (!prog) {
1445 const char *sep = strchrnul(path, ';');
1446 int dirlen = sep - path;
1447 if (dirlen)
1448 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1449 if (!*sep)
1450 break;
1451 path = sep + 1;
1452 }
1453
1454 return prog;
1455}
1456
1457char *mingw_locate_in_PATH(const char *cmd)
1458{
1459 return path_lookup(cmd, 0);
1460}
1461
1462static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
1463{
1464 while (*s && *s != c)
1465 s++;
1466 return s;
1467}
1468
1469/* Compare only keys */
1470static int wenvcmp(const void *a, const void *b)
1471{
1472 wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
1473 size_t p_len, q_len;
1474
1475 /* Find the keys */
1476 p_len = wcschrnul(p, L'=') - p;
1477 q_len = wcschrnul(q, L'=') - q;
1478
1479 /* If the length differs, include the shorter key's NUL */
1480 if (p_len < q_len)
1481 p_len++;
1482 else if (p_len > q_len)
1483 p_len = q_len + 1;
1484
1485 return _wcsnicmp(p, q, p_len);
1486}
1487
1488/*
1489 * Build an environment block combining the inherited environment
1490 * merged with the given list of settings.
1491 *
1492 * Values of the form "KEY=VALUE" in deltaenv override inherited values.
1493 * Values of the form "KEY" in deltaenv delete inherited values.
1494 *
1495 * Multiple entries in deltaenv for the same key are explicitly allowed.
1496 *
1497 * We return a contiguous block of UNICODE strings with a final trailing
1498 * zero word.
1499 */
1500static wchar_t *make_environment_block(char **deltaenv)
1501{
1502 wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
1503 size_t wlen, s, delta_size, size;
1504
1505 wchar_t **array = NULL;
1506 size_t alloc = 0, nr = 0, i;
1507
1508 size = 1; /* for extra NUL at the end */
1509
1510 /* If there is no deltaenv to apply, simply return a copy. */
1511 if (!deltaenv || !*deltaenv) {
1512 for (p = wenv; p && *p; ) {
1513 size_t s = wcslen(p) + 1;
1514 size += s;
1515 p += s;
1516 }
1517
1518 DUP_ARRAY(result, wenv, size);
1519 FreeEnvironmentStringsW(wenv);
1520 return result;
1521 }
1522
1523 /*
1524 * If there is a deltaenv, let's accumulate all keys into `array`,
1525 * sort them using the stable git_stable_qsort() and then copy,
1526 * skipping duplicate keys
1527 */
1528 for (p = wenv; p && *p; ) {
1529 ALLOC_GROW(array, nr + 1, alloc);
1530 s = wcslen(p) + 1;
1531 array[nr++] = p;
1532 p += s;
1533 size += s;
1534 }
1535
1536 /* (over-)assess size needed for wchar version of deltaenv */
1537 for (delta_size = 0, i = 0; deltaenv[i]; i++)
1538 delta_size += strlen(deltaenv[i]) * 2 + 1;
1539 ALLOC_ARRAY(wdeltaenv, delta_size);
1540
1541 /* convert the deltaenv, appending to array */
1542 for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
1543 ALLOC_GROW(array, nr + 1, alloc);
1544 wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
1545 array[nr++] = p;
1546 p += wlen + 1;
1547 }
1548
1549 git_stable_qsort(array, nr, sizeof(*array), wenvcmp);
1550 ALLOC_ARRAY(result, size + delta_size);
1551
1552 for (p = result, i = 0; i < nr; i++) {
1553 /* Skip any duplicate keys; last one wins */
1554 while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
1555 i++;
1556
1557 /* Skip "to delete" entry */
1558 if (!wcschr(array[i], L'='))
1559 continue;
1560
1561 size = wcslen(array[i]) + 1;
1562 COPY_ARRAY(p, array[i], size);
1563 p += size;
1564 }
1565 *p = L'\0';
1566
1567 free(array);
1568 free(wdeltaenv);
1569 FreeEnvironmentStringsW(wenv);
1570 return result;
1571}
1572
1573static void do_unset_environment_variables(void)
1574{
1575 static int done;
1576 char *p = unset_environment_variables;
1577
1578 if (done || !p)
1579 return;
1580 done = 1;
1581
1582 for (;;) {
1583 char *comma = strchr(p, ',');
1584
1585 if (comma)
1586 *comma = '\0';
1587 unsetenv(p);
1588 if (!comma)
1589 break;
1590 p = comma + 1;
1591 }
1592}
1593
1594struct pinfo_t {
1595 struct pinfo_t *next;
1596 pid_t pid;
1597 HANDLE proc;
1598};
1599static struct pinfo_t *pinfo = NULL;
1600CRITICAL_SECTION pinfo_cs;
1601
1602/* Used to match and chomp off path components */
1603static inline int match_last_path_component(const char *path, size_t *len,
1604 const char *component)
1605{
1606 size_t component_len = strlen(component);
1607 if (*len < component_len + 1 ||
1608 !is_dir_sep(path[*len - component_len - 1]) ||
1609 fspathncmp(path + *len - component_len, component, component_len))
1610 return 0;
1611 *len -= component_len + 1;
1612 /* chomp off repeated dir separators */
1613 while (*len > 0 && is_dir_sep(path[*len - 1]))
1614 (*len)--;
1615 return 1;
1616}
1617
1618static int is_msys2_sh(const char *cmd)
1619{
1620 if (!cmd)
1621 return 0;
1622
1623 if (!strcmp(cmd, "sh")) {
1624 static int ret = -1;
1625 char *p;
1626
1627 if (ret >= 0)
1628 return ret;
1629
1630 p = path_lookup(cmd, 0);
1631 if (!p)
1632 ret = 0;
1633 else {
1634 size_t len = strlen(p);
1635
1636 ret = match_last_path_component(p, &len, "sh.exe") &&
1637 match_last_path_component(p, &len, "bin") &&
1638 match_last_path_component(p, &len, "usr");
1639 free(p);
1640 }
1641 return ret;
1642 }
1643
1644 if (ends_with(cmd, "\\sh.exe") || ends_with(cmd, "/sh.exe")) {
1645 static char *sh;
1646
1647 if (!sh)
1648 sh = path_lookup("sh", 0);
1649
1650 return !fspathcmp(cmd, sh);
1651 }
1652
1653 return 0;
1654}
1655
1656static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1657 const char *dir,
1658 int prepend_cmd, int fhin, int fhout, int fherr)
1659{
1660 STARTUPINFOEXW si;
1661 PROCESS_INFORMATION pi;
1662 LPPROC_THREAD_ATTRIBUTE_LIST attr_list = NULL;
1663 HANDLE stdhandles[3];
1664 DWORD stdhandles_count = 0;
1665 SIZE_T size;
1666 struct strbuf args;
1667 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1668 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1669 BOOL ret;
1670 HANDLE cons;
1671 const char *(*quote_arg)(const char *arg) =
1672 is_msys2_sh(cmd ? cmd : *argv) ?
1673 quote_arg_msys2 : quote_arg_msvc;
1674 const char *strace_env;
1675
1676 /* Make sure to override previous errors, if any */
1677 errno = 0;
1678
1679 do_unset_environment_variables();
1680
1681 /* Determine whether or not we are associated to a console */
1682 cons = CreateFileW(L"CONOUT$", GENERIC_WRITE,
1683 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1684 FILE_ATTRIBUTE_NORMAL, NULL);
1685 if (cons == INVALID_HANDLE_VALUE) {
1686 /* There is no console associated with this process.
1687 * Since the child is a console process, Windows
1688 * would normally create a console window. But
1689 * since we'll be redirecting std streams, we do
1690 * not need the console.
1691 * It is necessary to use DETACHED_PROCESS
1692 * instead of CREATE_NO_WINDOW to make ssh
1693 * recognize that it has no console.
1694 */
1695 flags |= DETACHED_PROCESS;
1696 } else {
1697 /* There is already a console. If we specified
1698 * DETACHED_PROCESS here, too, Windows would
1699 * disassociate the child from the console.
1700 * The same is true for CREATE_NO_WINDOW.
1701 * Go figure!
1702 */
1703 CloseHandle(cons);
1704 }
1705 memset(&si, 0, sizeof(si));
1706 si.StartupInfo.cb = sizeof(si);
1707 si.StartupInfo.hStdInput = winansi_get_osfhandle(fhin);
1708 si.StartupInfo.hStdOutput = winansi_get_osfhandle(fhout);
1709 si.StartupInfo.hStdError = winansi_get_osfhandle(fherr);
1710
1711 /* The list of handles cannot contain duplicates */
1712 if (si.StartupInfo.hStdInput != INVALID_HANDLE_VALUE)
1713 stdhandles[stdhandles_count++] = si.StartupInfo.hStdInput;
1714 if (si.StartupInfo.hStdOutput != INVALID_HANDLE_VALUE &&
1715 si.StartupInfo.hStdOutput != si.StartupInfo.hStdInput)
1716 stdhandles[stdhandles_count++] = si.StartupInfo.hStdOutput;
1717 if (si.StartupInfo.hStdError != INVALID_HANDLE_VALUE &&
1718 si.StartupInfo.hStdError != si.StartupInfo.hStdInput &&
1719 si.StartupInfo.hStdError != si.StartupInfo.hStdOutput)
1720 stdhandles[stdhandles_count++] = si.StartupInfo.hStdError;
1721 if (stdhandles_count)
1722 si.StartupInfo.dwFlags |= STARTF_USESTDHANDLES;
1723
1724 if (*argv && !strcmp(cmd, *argv))
1725 wcmd[0] = L'\0';
1726 else if (xutftowcs_path(wcmd, cmd) < 0)
1727 return -1;
1728 if (dir && xutftowcs_path(wdir, dir) < 0)
1729 return -1;
1730
1731 /* concatenate argv, quoting args as we go */
1732 strbuf_init(&args, 0);
1733 if (prepend_cmd) {
1734 char *quoted = (char *)quote_arg(cmd);
1735 strbuf_addstr(&args, quoted);
1736 if (quoted != cmd)
1737 free(quoted);
1738 }
1739 for (; *argv; argv++) {
1740 char *quoted = (char *)quote_arg(*argv);
1741 if (*args.buf)
1742 strbuf_addch(&args, ' ');
1743 strbuf_addstr(&args, quoted);
1744 if (quoted != *argv)
1745 free(quoted);
1746 }
1747
1748 strace_env = getenv("GIT_STRACE_COMMANDS");
1749 if (strace_env) {
1750 char *p = path_lookup("strace.exe", 1);
1751 if (!p)
1752 return error("strace not found!");
1753 if (xutftowcs_path(wcmd, p) < 0) {
1754 free(p);
1755 return -1;
1756 }
1757 free(p);
1758 if (!strcmp("1", strace_env) ||
1759 !strcasecmp("yes", strace_env) ||
1760 !strcasecmp("true", strace_env))
1761 strbuf_insert(&args, 0, "strace ", 7);
1762 else {
1763 const char *quoted = quote_arg(strace_env);
1764 struct strbuf buf = STRBUF_INIT;
1765 strbuf_addf(&buf, "strace -o %s ", quoted);
1766 if (quoted != strace_env)
1767 free((char *)quoted);
1768 strbuf_insert(&args, 0, buf.buf, buf.len);
1769 strbuf_release(&buf);
1770 }
1771 }
1772
1773 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1774 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1775 strbuf_release(&args);
1776
1777 wenvblk = make_environment_block(deltaenv);
1778
1779 memset(&pi, 0, sizeof(pi));
1780 if (stdhandles_count &&
1781 (InitializeProcThreadAttributeList(NULL, 1, 0, &size) ||
1782 GetLastError() == ERROR_INSUFFICIENT_BUFFER) &&
1783 (attr_list = (LPPROC_THREAD_ATTRIBUTE_LIST)
1784 (HeapAlloc(GetProcessHeap(), 0, size))) &&
1785 InitializeProcThreadAttributeList(attr_list, 1, 0, &size) &&
1786 UpdateProcThreadAttribute(attr_list, 0,
1787 PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
1788 stdhandles,
1789 stdhandles_count * sizeof(HANDLE),
1790 NULL, NULL)) {
1791 si.lpAttributeList = attr_list;
1792 flags |= EXTENDED_STARTUPINFO_PRESENT;
1793 }
1794
1795 ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
1796 stdhandles_count ? TRUE : FALSE,
1797 flags, wenvblk, dir ? wdir : NULL,
1798 &si.StartupInfo, &pi);
1799
1800 /*
1801 * On the off-chance that something with the file handle restriction
1802 * went wrong, silently fall back to trying without it.
1803 */
1804 if (!ret && stdhandles_count) {
1805 DWORD err = GetLastError();
1806 struct strbuf buf = STRBUF_INIT;
1807
1808 flags &= ~EXTENDED_STARTUPINFO_PRESENT;
1809 ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
1810 TRUE, flags, wenvblk, dir ? wdir : NULL,
1811 &si.StartupInfo, &pi);
1812 if (!ret)
1813 errno = err_win_to_posix(GetLastError());
1814 if (ret && buf.len) {
1815 warning("failed to restrict file handles (%ld)\n\n%s",
1816 err, buf.buf);
1817 }
1818 strbuf_release(&buf);
1819 } else if (!ret)
1820 errno = err_win_to_posix(GetLastError());
1821
1822 if (si.lpAttributeList)
1823 DeleteProcThreadAttributeList(si.lpAttributeList);
1824 if (attr_list)
1825 HeapFree(GetProcessHeap(), 0, attr_list);
1826
1827 free(wenvblk);
1828 free(wargs);
1829
1830 if (!ret)
1831 return -1;
1832
1833 CloseHandle(pi.hThread);
1834
1835 /*
1836 * The process ID is the human-readable identifier of the process
1837 * that we want to present in log and error messages. The handle
1838 * is not useful for this purpose. But we cannot close it, either,
1839 * because it is not possible to turn a process ID into a process
1840 * handle after the process terminated.
1841 * Keep the handle in a list for waitpid.
1842 */
1843 EnterCriticalSection(&pinfo_cs);
1844 {
1845 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1846 info->pid = pi.dwProcessId;
1847 info->proc = pi.hProcess;
1848 info->next = pinfo;
1849 pinfo = info;
1850 }
1851 LeaveCriticalSection(&pinfo_cs);
1852
1853 return (pid_t)pi.dwProcessId;
1854}
1855
1856static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1857{
1858 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1859}
1860
1861pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1862 const char *dir,
1863 int fhin, int fhout, int fherr)
1864{
1865 pid_t pid;
1866 char *prog = path_lookup(cmd, 0);
1867
1868 if (!prog) {
1869 errno = ENOENT;
1870 pid = -1;
1871 }
1872 else {
1873 const char *interpr = parse_interpreter(prog);
1874
1875 if (interpr) {
1876 const char *argv0 = argv[0];
1877 char *iprog = path_lookup(interpr, 1);
1878 argv[0] = prog;
1879 if (!iprog) {
1880 errno = ENOENT;
1881 pid = -1;
1882 }
1883 else {
1884 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1885 fhin, fhout, fherr);
1886 free(iprog);
1887 }
1888 argv[0] = argv0;
1889 }
1890 else
1891 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1892 fhin, fhout, fherr);
1893 free(prog);
1894 }
1895 return pid;
1896}
1897
1898static int try_shell_exec(const char *cmd, char *const *argv)
1899{
1900 const char *interpr = parse_interpreter(cmd);
1901 char *prog;
1902 int pid = 0;
1903
1904 if (!interpr)
1905 return 0;
1906 prog = path_lookup(interpr, 1);
1907 if (prog) {
1908 int exec_id;
1909 int argc = 0;
1910 char **argv2;
1911 while (argv[argc]) argc++;
1912 ALLOC_ARRAY(argv2, argc + 1);
1913 argv2[0] = (char *)cmd; /* full path to the script file */
1914 COPY_ARRAY(&argv2[1], &argv[1], argc);
1915 exec_id = trace2_exec(prog, (const char **)argv2);
1916 pid = mingw_spawnv(prog, (const char **)argv2, 1);
1917 if (pid >= 0) {
1918 int status;
1919 if (waitpid(pid, &status, 0) < 0)
1920 status = 255;
1921 trace2_exec_result(exec_id, status);
1922 exit(status);
1923 }
1924 trace2_exec_result(exec_id, -1);
1925 pid = 1; /* indicate that we tried but failed */
1926 free(prog);
1927 free(argv2);
1928 }
1929 return pid;
1930}
1931
1932int mingw_execv(const char *cmd, char *const *argv)
1933{
1934 /* check if git_command is a shell script */
1935 if (!try_shell_exec(cmd, argv)) {
1936 int pid, status;
1937 int exec_id;
1938
1939 exec_id = trace2_exec(cmd, (const char **)argv);
1940 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1941 if (pid < 0) {
1942 trace2_exec_result(exec_id, -1);
1943 return -1;
1944 }
1945 if (waitpid(pid, &status, 0) < 0)
1946 status = 255;
1947 trace2_exec_result(exec_id, status);
1948 exit(status);
1949 }
1950 return -1;
1951}
1952
1953int mingw_execvp(const char *cmd, char *const *argv)
1954{
1955 char *prog = path_lookup(cmd, 0);
1956
1957 if (prog) {
1958 mingw_execv(prog, argv);
1959 free(prog);
1960 } else
1961 errno = ENOENT;
1962
1963 return -1;
1964}
1965
1966int mingw_kill(pid_t pid, int sig)
1967{
1968 if (pid > 0 && sig == SIGTERM) {
1969 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1970
1971 if (TerminateProcess(h, -1)) {
1972 CloseHandle(h);
1973 return 0;
1974 }
1975
1976 errno = err_win_to_posix(GetLastError());
1977 CloseHandle(h);
1978 return -1;
1979 } else if (pid > 0 && sig == 0) {
1980 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1981 if (h) {
1982 CloseHandle(h);
1983 return 0;
1984 }
1985 }
1986
1987 errno = EINVAL;
1988 return -1;
1989}
1990
1991/*
1992 * UTF-8 versions of getenv(), putenv() and unsetenv().
1993 * Internally, they use the CRT's stock UNICODE routines
1994 * to avoid data loss.
1995 */
1996char *mingw_getenv(const char *name)
1997{
1998#define GETENV_MAX_RETAIN 64
1999 static char *values[GETENV_MAX_RETAIN];
2000 static int value_counter;
2001 size_t len_key, len_value;
2002 wchar_t *w_key;
2003 char *value;
2004 wchar_t w_value[32768];
2005
2006 if (!name || !*name)
2007 return NULL;
2008
2009 len_key = strlen(name) + 1;
2010 /* We cannot use xcalloc() here because that uses getenv() itself */
2011 w_key = calloc(len_key, sizeof(wchar_t));
2012 if (!w_key)
2013 die("Out of memory, (tried to allocate %"PRIuMAX" wchar_t's)",
2014 (uintmax_t)len_key);
2015 xutftowcs(w_key, name, len_key);
2016 /* GetEnvironmentVariableW() only sets the last error upon failure */
2017 SetLastError(ERROR_SUCCESS);
2018 len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
2019 if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
2020 free(w_key);
2021 return NULL;
2022 }
2023 free(w_key);
2024
2025 len_value = len_value * 3 + 1;
2026 /* We cannot use xcalloc() here because that uses getenv() itself */
2027 value = calloc(len_value, sizeof(char));
2028 if (!value)
2029 die("Out of memory, (tried to allocate %"PRIuMAX" bytes)",
2030 (uintmax_t)len_value);
2031 xwcstoutf(value, w_value, len_value);
2032
2033 /*
2034 * We return `value` which is an allocated value and the caller is NOT
2035 * expecting to have to free it, so we keep a round-robin array,
2036 * invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
2037 */
2038 free(values[value_counter]);
2039 values[value_counter++] = value;
2040 if (value_counter >= ARRAY_SIZE(values))
2041 value_counter = 0;
2042
2043 return value;
2044}
2045
2046int mingw_putenv(const char *namevalue)
2047{
2048 size_t size;
2049 wchar_t *wide, *equal;
2050 BOOL result;
2051
2052 if (!namevalue || !*namevalue)
2053 return 0;
2054
2055 size = strlen(namevalue) * 2 + 1;
2056 wide = calloc(size, sizeof(wchar_t));
2057 if (!wide)
2058 die("Out of memory, (tried to allocate %" PRIuMAX " wchar_t's)",
2059 (uintmax_t)size);
2060 xutftowcs(wide, namevalue, size);
2061 equal = wcschr(wide, L'=');
2062 if (!equal)
2063 result = SetEnvironmentVariableW(wide, NULL);
2064 else {
2065 *equal = L'\0';
2066 result = SetEnvironmentVariableW(wide, equal + 1);
2067 }
2068 free(wide);
2069
2070 if (!result)
2071 errno = err_win_to_posix(GetLastError());
2072
2073 return result ? 0 : -1;
2074}
2075
2076static void ensure_socket_initialization(void)
2077{
2078 WSADATA wsa;
2079 static int initialized = 0;
2080
2081 if (initialized)
2082 return;
2083
2084 if (WSAStartup(MAKEWORD(2,2), &wsa))
2085 die("unable to initialize winsock subsystem, error %d",
2086 WSAGetLastError());
2087
2088 atexit((void(*)(void)) WSACleanup);
2089 initialized = 1;
2090}
2091
2092#undef gethostname
2093int mingw_gethostname(char *name, int namelen)
2094{
2095 ensure_socket_initialization();
2096 return gethostname(name, namelen);
2097}
2098
2099#undef gethostbyname
2100struct hostent *mingw_gethostbyname(const char *host)
2101{
2102 ensure_socket_initialization();
2103 return gethostbyname(host);
2104}
2105
2106#undef getaddrinfo
2107int mingw_getaddrinfo(const char *node, const char *service,
2108 const struct addrinfo *hints, struct addrinfo **res)
2109{
2110 ensure_socket_initialization();
2111 return getaddrinfo(node, service, hints, res);
2112}
2113
2114int mingw_socket(int domain, int type, int protocol)
2115{
2116 int sockfd;
2117 SOCKET s;
2118
2119 ensure_socket_initialization();
2120 s = WSASocket(domain, type, protocol, NULL, 0, 0);
2121 if (s == INVALID_SOCKET) {
2122 /*
2123 * WSAGetLastError() values are regular BSD error codes
2124 * biased by WSABASEERR.
2125 * However, strerror() does not know about networking
2126 * specific errors, which are values beginning at 38 or so.
2127 * Therefore, we choose to leave the biased error code
2128 * in errno so that _if_ someone looks up the code somewhere,
2129 * then it is at least the number that are usually listed.
2130 */
2131 errno = WSAGetLastError();
2132 return -1;
2133 }
2134 /* convert into a file descriptor */
2135 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
2136 closesocket(s);
2137 return error("unable to make a socket file descriptor: %s",
2138 strerror(errno));
2139 }
2140 return sockfd;
2141}
2142
2143#undef connect
2144int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
2145{
2146 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2147 return connect(s, sa, sz);
2148}
2149
2150#undef bind
2151int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
2152{
2153 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2154 return bind(s, sa, sz);
2155}
2156
2157#undef setsockopt
2158int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
2159{
2160 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2161 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
2162}
2163
2164#undef shutdown
2165int mingw_shutdown(int sockfd, int how)
2166{
2167 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2168 return shutdown(s, how);
2169}
2170
2171#undef listen
2172int mingw_listen(int sockfd, int backlog)
2173{
2174 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2175 return listen(s, backlog);
2176}
2177
2178#undef accept
2179int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
2180{
2181 int sockfd2;
2182
2183 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
2184 SOCKET s2 = accept(s1, sa, sz);
2185
2186 /* convert into a file descriptor */
2187 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
2188 int err = errno;
2189 closesocket(s2);
2190 return error("unable to make a socket file descriptor: %s",
2191 strerror(err));
2192 }
2193 return sockfd2;
2194}
2195
2196#undef rename
2197int mingw_rename(const char *pold, const char *pnew)
2198{
2199 static int supports_file_rename_info_ex = 1;
2200 DWORD attrs, gle;
2201 int tries = 0;
2202 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
2203 int wpnew_len;
2204
2205 if (xutftowcs_path(wpold, pold) < 0)
2206 return -1;
2207 wpnew_len = xutftowcs_path(wpnew, pnew);
2208 if (wpnew_len < 0)
2209 return -1;
2210
2211 /*
2212 * Try native rename() first to get errno right.
2213 * It is based on MoveFile(), which cannot overwrite existing files.
2214 */
2215 if (!_wrename(wpold, wpnew))
2216 return 0;
2217 if (errno != EEXIST)
2218 return -1;
2219
2220repeat:
2221 if (supports_file_rename_info_ex) {
2222 /*
2223 * Our minimum required Windows version is still set to Windows
2224 * Vista. We thus have to declare required infrastructure for
2225 * FileRenameInfoEx ourselves until we bump _WIN32_WINNT to
2226 * 0x0A00. Furthermore, we have to handle cases where the
2227 * FileRenameInfoEx call isn't supported yet.
2228 */
2229#define FILE_RENAME_FLAG_REPLACE_IF_EXISTS 0x00000001
2230#define FILE_RENAME_FLAG_POSIX_SEMANTICS 0x00000002
2231 FILE_INFO_BY_HANDLE_CLASS FileRenameInfoEx = 22;
2232 struct {
2233 /*
2234 * This is usually an unnamed union, but that is not
2235 * part of ISO C99. We thus inline the field, as we
2236 * really only care for the Flags field anyway.
2237 */
2238 DWORD Flags;
2239 HANDLE RootDirectory;
2240 DWORD FileNameLength;
2241 /*
2242 * The actual structure is defined with a single-character
2243 * flex array so that the structure has to be allocated on
2244 * the heap. As we declare this structure ourselves though
2245 * we can avoid the allocation and define FileName to have
2246 * MAX_PATH bytes.
2247 */
2248 WCHAR FileName[MAX_PATH];
2249 } rename_info = { 0 };
2250 HANDLE old_handle = INVALID_HANDLE_VALUE;
2251 BOOL success;
2252
2253 old_handle = CreateFileW(wpold, DELETE,
2254 FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE,
2255 NULL, OPEN_EXISTING,
2256 FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
2257 NULL);
2258 if (old_handle == INVALID_HANDLE_VALUE) {
2259 errno = err_win_to_posix(GetLastError());
2260 return -1;
2261 }
2262
2263 rename_info.Flags = FILE_RENAME_FLAG_REPLACE_IF_EXISTS |
2264 FILE_RENAME_FLAG_POSIX_SEMANTICS;
2265 rename_info.FileNameLength = wpnew_len * sizeof(WCHAR);
2266 memcpy(rename_info.FileName, wpnew, wpnew_len * sizeof(WCHAR));
2267
2268 success = SetFileInformationByHandle(old_handle, FileRenameInfoEx,
2269 &rename_info, sizeof(rename_info));
2270 gle = GetLastError();
2271 CloseHandle(old_handle);
2272 if (success)
2273 return 0;
2274
2275 /*
2276 * When we see ERROR_INVALID_PARAMETER we can assume that the
2277 * current system doesn't support FileRenameInfoEx. Keep us
2278 * from using it in future calls and retry.
2279 */
2280 if (gle == ERROR_INVALID_PARAMETER ||
2281 gle == ERROR_NOT_SUPPORTED ||
2282 gle == ERROR_INVALID_FUNCTION) {
2283 supports_file_rename_info_ex = 0;
2284 goto repeat;
2285 }
2286
2287 /*
2288 * In theory, we shouldn't get ERROR_ACCESS_DENIED because we
2289 * always open files with FILE_SHARE_DELETE But in practice we
2290 * cannot assume that Git is the only one accessing files, and
2291 * other applications may not set FILE_SHARE_DELETE. So we have
2292 * to retry.
2293 */
2294 } else {
2295 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
2296 return 0;
2297 gle = GetLastError();
2298 }
2299
2300 /* TODO: translate more errors */
2301 if (gle == ERROR_ACCESS_DENIED &&
2302 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
2303 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
2304 DWORD attrsold = GetFileAttributesW(wpold);
2305 if (attrsold == INVALID_FILE_ATTRIBUTES ||
2306 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
2307 errno = EISDIR;
2308 else if (!_wrmdir(wpnew))
2309 goto repeat;
2310 return -1;
2311 }
2312 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
2313 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
2314 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
2315 return 0;
2316 gle = GetLastError();
2317 /* revert file attributes on failure */
2318 SetFileAttributesW(wpnew, attrs);
2319 }
2320 }
2321 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
2322 /*
2323 * We assume that some other process had the source or
2324 * destination file open at the wrong moment and retry.
2325 * In order to give the other process a higher chance to
2326 * complete its operation, we give up our time slice now.
2327 * If we have to retry again, we do sleep a bit.
2328 */
2329 Sleep(delay[tries]);
2330 tries++;
2331 goto repeat;
2332 }
2333 if (gle == ERROR_ACCESS_DENIED &&
2334 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
2335 "Should I try again?", pold, pnew))
2336 goto repeat;
2337
2338 errno = EACCES;
2339 return -1;
2340}
2341
2342/*
2343 * Note that this doesn't return the actual pagesize, but
2344 * the allocation granularity. If future Windows specific git code
2345 * needs the real getpagesize function, we need to find another solution.
2346 */
2347int mingw_getpagesize(void)
2348{
2349 SYSTEM_INFO si;
2350 GetSystemInfo(&si);
2351 return si.dwAllocationGranularity;
2352}
2353
2354/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
2355enum EXTENDED_NAME_FORMAT {
2356 NameDisplay = 3,
2357 NameUserPrincipal = 8
2358};
2359
2360static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
2361{
2362 DECLARE_PROC_ADDR(secur32.dll, BOOL, SEC_ENTRY, GetUserNameExW,
2363 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
2364 static wchar_t wbuffer[1024];
2365 DWORD len;
2366
2367 if (!INIT_PROC_ADDR(GetUserNameExW))
2368 return NULL;
2369
2370 len = ARRAY_SIZE(wbuffer);
2371 if (GetUserNameExW(type, wbuffer, &len)) {
2372 char *converted = xmalloc((len *= 3));
2373 if (xwcstoutf(converted, wbuffer, len) >= 0)
2374 return converted;
2375 free(converted);
2376 }
2377
2378 return NULL;
2379}
2380
2381char *mingw_query_user_email(void)
2382{
2383 return get_extended_user_info(NameUserPrincipal);
2384}
2385
2386struct passwd *getpwuid(int uid UNUSED)
2387{
2388 static unsigned initialized;
2389 static char user_name[100];
2390 static struct passwd *p;
2391 wchar_t buf[100];
2392 DWORD len;
2393
2394 if (initialized)
2395 return p;
2396
2397 len = ARRAY_SIZE(buf);
2398 if (!GetUserNameW(buf, &len)) {
2399 initialized = 1;
2400 return NULL;
2401 }
2402
2403 if (xwcstoutf(user_name, buf, sizeof(user_name)) < 0) {
2404 initialized = 1;
2405 return NULL;
2406 }
2407
2408 p = xmalloc(sizeof(*p));
2409 p->pw_name = user_name;
2410 p->pw_gecos = get_extended_user_info(NameDisplay);
2411 if (!p->pw_gecos)
2412 /*
2413 * Data returned by getpwuid(3P) is treated as internal and
2414 * must never be written to or freed.
2415 */
2416 p->pw_gecos = (char *) "unknown";
2417 p->pw_dir = NULL;
2418
2419 initialized = 1;
2420 return p;
2421}
2422
2423static HANDLE timer_event;
2424static HANDLE timer_thread;
2425static int timer_interval;
2426static int one_shot;
2427static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
2428
2429/* The timer works like this:
2430 * The thread, ticktack(), is a trivial routine that most of the time
2431 * only waits to receive the signal to terminate. The main thread tells
2432 * the thread to terminate by setting the timer_event to the signalled
2433 * state.
2434 * But ticktack() interrupts the wait state after the timer's interval
2435 * length to call the signal handler.
2436 */
2437
2438static unsigned __stdcall ticktack(void *dummy UNUSED)
2439{
2440 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
2441 mingw_raise(SIGALRM);
2442 if (one_shot)
2443 break;
2444 }
2445 return 0;
2446}
2447
2448static int start_timer_thread(void)
2449{
2450 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
2451 if (timer_event) {
2452 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
2453 if (!timer_thread )
2454 return errno = ENOMEM,
2455 error("cannot start timer thread");
2456 } else
2457 return errno = ENOMEM,
2458 error("cannot allocate resources for timer");
2459 return 0;
2460}
2461
2462static void stop_timer_thread(void)
2463{
2464 if (timer_event)
2465 SetEvent(timer_event); /* tell thread to terminate */
2466 if (timer_thread) {
2467 int rc = WaitForSingleObject(timer_thread, 10000);
2468 if (rc == WAIT_TIMEOUT)
2469 error("timer thread did not terminate timely");
2470 else if (rc != WAIT_OBJECT_0)
2471 error("waiting for timer thread failed: %lu",
2472 GetLastError());
2473 CloseHandle(timer_thread);
2474 }
2475 if (timer_event)
2476 CloseHandle(timer_event);
2477 timer_event = NULL;
2478 timer_thread = NULL;
2479}
2480
2481static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
2482{
2483 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
2484}
2485
2486int setitimer(int type UNUSED, struct itimerval *in, struct itimerval *out)
2487{
2488 static const struct timeval zero;
2489 static int atexit_done;
2490
2491 if (out)
2492 return errno = EINVAL,
2493 error("setitimer param 3 != NULL not implemented");
2494 if (!is_timeval_eq(&in->it_interval, &zero) &&
2495 !is_timeval_eq(&in->it_interval, &in->it_value))
2496 return errno = EINVAL,
2497 error("setitimer: it_interval must be zero or eq it_value");
2498
2499 if (timer_thread)
2500 stop_timer_thread();
2501
2502 if (is_timeval_eq(&in->it_value, &zero) &&
2503 is_timeval_eq(&in->it_interval, &zero))
2504 return 0;
2505
2506 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
2507 one_shot = is_timeval_eq(&in->it_interval, &zero);
2508 if (!atexit_done) {
2509 atexit(stop_timer_thread);
2510 atexit_done = 1;
2511 }
2512 return start_timer_thread();
2513}
2514
2515int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2516{
2517 if (sig == SIGCHLD)
2518 return -1;
2519 else if (sig != SIGALRM)
2520 return errno = EINVAL,
2521 error("sigaction only implemented for SIGALRM");
2522 if (out)
2523 return errno = EINVAL,
2524 error("sigaction: param 3 != NULL not implemented");
2525
2526 timer_fn = in->sa_handler;
2527 return 0;
2528}
2529
2530#undef signal
2531sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2532{
2533 sig_handler_t old;
2534
2535 switch (sig) {
2536 case SIGALRM:
2537 old = timer_fn;
2538 timer_fn = handler;
2539 break;
2540
2541 case SIGINT:
2542 old = sigint_fn;
2543 sigint_fn = handler;
2544 break;
2545
2546 default:
2547 return signal(sig, handler);
2548 }
2549
2550 return old;
2551}
2552
2553#undef raise
2554int mingw_raise(int sig)
2555{
2556 switch (sig) {
2557 case SIGALRM:
2558 if (timer_fn == SIG_DFL) {
2559 if (isatty(STDERR_FILENO))
2560 fputs("Alarm clock\n", stderr);
2561 exit(128 + SIGALRM);
2562 } else if (timer_fn != SIG_IGN)
2563 timer_fn(SIGALRM);
2564 return 0;
2565
2566 case SIGINT:
2567 if (sigint_fn == SIG_DFL)
2568 exit(128 + SIGINT);
2569 else if (sigint_fn != SIG_IGN)
2570 sigint_fn(SIGINT);
2571 return 0;
2572
2573#if defined(_MSC_VER)
2574 case SIGILL:
2575 case SIGFPE:
2576 case SIGSEGV:
2577 case SIGTERM:
2578 case SIGBREAK:
2579 case SIGABRT:
2580 case SIGABRT_COMPAT:
2581 /*
2582 * The <signal.h> header in the MS C Runtime defines 8 signals
2583 * as being supported on the platform. Anything else causes an
2584 * "Invalid signal or error" (which in DEBUG builds causes the
2585 * Abort/Retry/Ignore dialog). We by-pass the CRT for things we
2586 * already know will fail.
2587 */
2588 return raise(sig);
2589 default:
2590 errno = EINVAL;
2591 return -1;
2592
2593#else
2594
2595 default:
2596 return raise(sig);
2597
2598#endif
2599
2600 }
2601}
2602
2603int link(const char *oldpath, const char *newpath)
2604{
2605 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2606 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2607 xutftowcs_path(wnewpath, newpath) < 0)
2608 return -1;
2609
2610 if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
2611 errno = err_win_to_posix(GetLastError());
2612 return -1;
2613 }
2614 return 0;
2615}
2616
2617pid_t waitpid(pid_t pid, int *status, int options)
2618{
2619 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2620 FALSE, pid);
2621 if (!h) {
2622 errno = ECHILD;
2623 return -1;
2624 }
2625
2626 if (pid > 0 && options & WNOHANG) {
2627 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2628 CloseHandle(h);
2629 return 0;
2630 }
2631 options &= ~WNOHANG;
2632 }
2633
2634 if (options == 0) {
2635 struct pinfo_t **ppinfo;
2636 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2637 CloseHandle(h);
2638 return 0;
2639 }
2640
2641 if (status)
2642 GetExitCodeProcess(h, (LPDWORD)status);
2643
2644 EnterCriticalSection(&pinfo_cs);
2645
2646 ppinfo = &pinfo;
2647 while (*ppinfo) {
2648 struct pinfo_t *info = *ppinfo;
2649 if (info->pid == pid) {
2650 CloseHandle(info->proc);
2651 *ppinfo = info->next;
2652 free(info);
2653 break;
2654 }
2655 ppinfo = &info->next;
2656 }
2657
2658 LeaveCriticalSection(&pinfo_cs);
2659
2660 CloseHandle(h);
2661 return pid;
2662 }
2663 CloseHandle(h);
2664
2665 errno = EINVAL;
2666 return -1;
2667}
2668
2669int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2670{
2671 int upos = 0, wpos = 0;
2672 const unsigned char *utf = (const unsigned char*) utfs;
2673 if (!utf || !wcs || wcslen < 1) {
2674 errno = EINVAL;
2675 return -1;
2676 }
2677 /* reserve space for \0 */
2678 wcslen--;
2679 if (utflen < 0)
2680 utflen = INT_MAX;
2681
2682 while (upos < utflen) {
2683 int c = utf[upos++] & 0xff;
2684 if (utflen == INT_MAX && c == 0)
2685 break;
2686
2687 if (wpos >= wcslen) {
2688 wcs[wpos] = 0;
2689 errno = ERANGE;
2690 return -1;
2691 }
2692
2693 if (c < 0x80) {
2694 /* ASCII */
2695 wcs[wpos++] = c;
2696 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2697 (utf[upos] & 0xc0) == 0x80) {
2698 /* 2-byte utf-8 */
2699 c = ((c & 0x1f) << 6);
2700 c |= (utf[upos++] & 0x3f);
2701 wcs[wpos++] = c;
2702 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2703 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2704 (utf[upos] & 0xc0) == 0x80 &&
2705 (utf[upos + 1] & 0xc0) == 0x80) {
2706 /* 3-byte utf-8 */
2707 c = ((c & 0x0f) << 12);
2708 c |= ((utf[upos++] & 0x3f) << 6);
2709 c |= (utf[upos++] & 0x3f);
2710 wcs[wpos++] = c;
2711 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2712 wpos + 1 < wcslen &&
2713 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2714 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2715 (utf[upos] & 0xc0) == 0x80 &&
2716 (utf[upos + 1] & 0xc0) == 0x80 &&
2717 (utf[upos + 2] & 0xc0) == 0x80) {
2718 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2719 c = ((c & 0x07) << 18);
2720 c |= ((utf[upos++] & 0x3f) << 12);
2721 c |= ((utf[upos++] & 0x3f) << 6);
2722 c |= (utf[upos++] & 0x3f);
2723 c -= 0x10000;
2724 wcs[wpos++] = 0xd800 | (c >> 10);
2725 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2726 } else if (c >= 0xa0) {
2727 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2728 wcs[wpos++] = c;
2729 } else {
2730 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2731 static const char *hex = "0123456789abcdef";
2732 wcs[wpos++] = hex[c >> 4];
2733 if (wpos < wcslen)
2734 wcs[wpos++] = hex[c & 0x0f];
2735 }
2736 }
2737 wcs[wpos] = 0;
2738 return wpos;
2739}
2740
2741int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2742{
2743 if (!wcs || !utf || utflen < 1) {
2744 errno = EINVAL;
2745 return -1;
2746 }
2747 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2748 if (utflen)
2749 return utflen - 1;
2750 errno = ERANGE;
2751 return -1;
2752}
2753
2754static void setup_windows_environment(void)
2755{
2756 char *tmp = getenv("TMPDIR");
2757
2758 /* on Windows it is TMP and TEMP */
2759 if (!tmp) {
2760 if (!(tmp = getenv("TMP")))
2761 tmp = getenv("TEMP");
2762 if (tmp) {
2763 setenv("TMPDIR", tmp, 1);
2764 tmp = getenv("TMPDIR");
2765 }
2766 }
2767
2768 if (tmp) {
2769 /*
2770 * Convert all dir separators to forward slashes,
2771 * to help shell commands called from the Git
2772 * executable (by not mistaking the dir separators
2773 * for escape characters).
2774 */
2775 convert_slashes(tmp);
2776 }
2777
2778 /* simulate TERM to enable auto-color (see color.c) */
2779 if (!getenv("TERM"))
2780 setenv("TERM", "cygwin", 1);
2781
2782 /* calculate HOME if not set */
2783 if (!getenv("HOME")) {
2784 /*
2785 * try $HOMEDRIVE$HOMEPATH - the home share may be a network
2786 * location, thus also check if the path exists (i.e. is not
2787 * disconnected)
2788 */
2789 if ((tmp = getenv("HOMEDRIVE"))) {
2790 struct strbuf buf = STRBUF_INIT;
2791 strbuf_addstr(&buf, tmp);
2792 if ((tmp = getenv("HOMEPATH"))) {
2793 strbuf_addstr(&buf, tmp);
2794 if (is_directory(buf.buf))
2795 setenv("HOME", buf.buf, 1);
2796 else
2797 tmp = NULL; /* use $USERPROFILE */
2798 }
2799 strbuf_release(&buf);
2800 }
2801 /* use $USERPROFILE if the home share is not available */
2802 if (!tmp && (tmp = getenv("USERPROFILE")))
2803 setenv("HOME", tmp, 1);
2804 }
2805}
2806
2807static void get_current_user_sid(PSID *sid, HANDLE *linked_token)
2808{
2809 HANDLE token;
2810 DWORD len = 0;
2811 TOKEN_ELEVATION_TYPE elevationType;
2812 DWORD size;
2813
2814 *sid = NULL;
2815 *linked_token = NULL;
2816
2817 if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token))
2818 return;
2819
2820 if (!GetTokenInformation(token, TokenUser, NULL, 0, &len)) {
2821 TOKEN_USER *info = xmalloc((size_t)len);
2822 if (GetTokenInformation(token, TokenUser, info, len, &len)) {
2823 len = GetLengthSid(info->User.Sid);
2824 *sid = xmalloc(len);
2825 if (!CopySid(len, *sid, info->User.Sid)) {
2826 error(_("failed to copy SID (%ld)"),
2827 GetLastError());
2828 FREE_AND_NULL(*sid);
2829 }
2830 }
2831 FREE_AND_NULL(info);
2832 }
2833
2834 if (GetTokenInformation(token, TokenElevationType, &elevationType, sizeof(elevationType), &size) &&
2835 elevationType == TokenElevationTypeLimited) {
2836 /*
2837 * The current process is run by a member of the Administrators
2838 * group, but is not running elevated.
2839 */
2840 if (!GetTokenInformation(token, TokenLinkedToken, linked_token, sizeof(*linked_token), &size))
2841 linked_token = NULL; /* there is no linked token */
2842 }
2843
2844 CloseHandle(token);
2845}
2846
2847static BOOL user_sid_to_user_name(PSID sid, LPSTR *str)
2848{
2849 SID_NAME_USE pe_use;
2850 DWORD len_user = 0, len_domain = 0;
2851 BOOL translate_sid_to_user;
2852
2853 /*
2854 * returns only FALSE, because the string pointers are NULL
2855 */
2856 LookupAccountSidA(NULL, sid, NULL, &len_user, NULL, &len_domain,
2857 &pe_use);
2858 /*
2859 * Alloc needed space of the strings
2860 */
2861 ALLOC_ARRAY((*str), (size_t)len_domain + (size_t)len_user);
2862 translate_sid_to_user = LookupAccountSidA(NULL, sid,
2863 (*str) + len_domain, &len_user, *str, &len_domain, &pe_use);
2864 if (!translate_sid_to_user)
2865 FREE_AND_NULL(*str);
2866 else
2867 (*str)[len_domain] = '/';
2868 return translate_sid_to_user;
2869}
2870
2871static int acls_supported(const char *path)
2872{
2873 size_t offset = offset_1st_component(path);
2874 WCHAR wroot[MAX_PATH];
2875 DWORD file_system_flags;
2876
2877 if (offset &&
2878 xutftowcsn(wroot, path, MAX_PATH, offset) > 0 &&
2879 GetVolumeInformationW(wroot, NULL, 0, NULL, NULL,
2880 &file_system_flags, NULL, 0))
2881 return !!(file_system_flags & FILE_PERSISTENT_ACLS);
2882
2883 return 0;
2884}
2885
2886int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
2887{
2888 WCHAR wpath[MAX_PATH];
2889 PSID sid = NULL;
2890 PSECURITY_DESCRIPTOR descriptor = NULL;
2891 DWORD err;
2892
2893 static wchar_t home[MAX_PATH];
2894
2895 int result = 0;
2896
2897 if (xutftowcs_path(wpath, path) < 0)
2898 return 0;
2899
2900 /*
2901 * On Windows, the home directory is owned by the administrator, but for
2902 * all practical purposes, it belongs to the user. Do pretend that it is
2903 * owned by the user.
2904 */
2905 if (!*home) {
2906 DWORD size = ARRAY_SIZE(home);
2907 DWORD len = GetEnvironmentVariableW(L"HOME", home, size);
2908 if (!len || len > size)
2909 wcscpy(home, L"::N/A::");
2910 }
2911 if (!wcsicmp(wpath, home))
2912 return 1;
2913
2914 /* Get the owner SID */
2915 err = GetNamedSecurityInfoW(wpath, SE_FILE_OBJECT,
2916 OWNER_SECURITY_INFORMATION |
2917 DACL_SECURITY_INFORMATION,
2918 &sid, NULL, NULL, NULL, &descriptor);
2919
2920 if (err != ERROR_SUCCESS)
2921 error(_("failed to get owner for '%s' (%ld)"), path, err);
2922 else if (sid && IsValidSid(sid)) {
2923 /* Now, verify that the SID matches the current user's */
2924 static PSID current_user_sid;
2925 static HANDLE linked_token;
2926 BOOL is_member;
2927
2928 if (!current_user_sid)
2929 get_current_user_sid(¤t_user_sid, &linked_token);
2930
2931 if (current_user_sid &&
2932 IsValidSid(current_user_sid) &&
2933 EqualSid(sid, current_user_sid))
2934 result = 1;
2935 else if (IsWellKnownSid(sid, WinBuiltinAdministratorsSid) &&
2936 ((CheckTokenMembership(NULL, sid, &is_member) &&
2937 is_member) ||
2938 (linked_token &&
2939 CheckTokenMembership(linked_token, sid, &is_member) &&
2940 is_member)))
2941 /*
2942 * If owned by the Administrators group, and the
2943 * current user is an administrator, we consider that
2944 * okay, too.
2945 */
2946 result = 1;
2947 else if (report &&
2948 IsWellKnownSid(sid, WinWorldSid) &&
2949 !acls_supported(path)) {
2950 /*
2951 * On FAT32 volumes, ownership is not actually recorded.
2952 */
2953 strbuf_addf(report, "'%s' is on a file system that does "
2954 "not record ownership\n", path);
2955 } else if (report) {
2956 PCSTR str1, str2, str3, str4;
2957 LPSTR to_free1 = NULL, to_free3 = NULL,
2958 to_local_free2 = NULL, to_local_free4 = NULL;
2959
2960 if (user_sid_to_user_name(sid, &to_free1))
2961 str1 = to_free1;
2962 else
2963 str1 = "(inconvertible)";
2964 if (ConvertSidToStringSidA(sid, &to_local_free2))
2965 str2 = to_local_free2;
2966 else
2967 str2 = "(inconvertible)";
2968
2969 if (!current_user_sid) {
2970 str3 = "(none)";
2971 str4 = "(none)";
2972 }
2973 else if (!IsValidSid(current_user_sid)) {
2974 str3 = "(invalid)";
2975 str4 = "(invalid)";
2976 } else {
2977 if (user_sid_to_user_name(current_user_sid,
2978 &to_free3))
2979 str3 = to_free3;
2980 else
2981 str3 = "(inconvertible)";
2982 if (ConvertSidToStringSidA(current_user_sid,
2983 &to_local_free4))
2984 str4 = to_local_free4;
2985 else
2986 str4 = "(inconvertible)";
2987 }
2988 strbuf_addf(report,
2989 "'%s' is owned by:\n"
2990 "\t%s (%s)\nbut the current user is:\n"
2991 "\t%s (%s)\n",
2992 path, str1, str2, str3, str4);
2993 free(to_free1);
2994 LocalFree(to_local_free2);
2995 free(to_free3);
2996 LocalFree(to_local_free4);
2997 }
2998 }
2999
3000 /*
3001 * We can release the security descriptor struct only now because `sid`
3002 * actually points into this struct.
3003 */
3004 if (descriptor)
3005 LocalFree(descriptor);
3006
3007 return result;
3008}
3009
3010int is_valid_win32_path(const char *path, int allow_literal_nul)
3011{
3012 const char *p = path;
3013 int preceding_space_or_period = 0, i = 0, periods = 0;
3014
3015 if (!protect_ntfs)
3016 return 1;
3017
3018 skip_dos_drive_prefix((char **)&path);
3019 goto segment_start;
3020
3021 for (;;) {
3022 char c = *(path++);
3023 switch (c) {
3024 case '\0':
3025 case '/': case '\\':
3026 /* cannot end in ` ` or `.`, except for `.` and `..` */
3027 if (preceding_space_or_period &&
3028 (i != periods || periods > 2))
3029 return 0;
3030 if (!c)
3031 return 1;
3032
3033 i = periods = preceding_space_or_period = 0;
3034
3035segment_start:
3036 switch (*path) {
3037 case 'a': case 'A': /* AUX */
3038 if (((c = path[++i]) != 'u' && c != 'U') ||
3039 ((c = path[++i]) != 'x' && c != 'X')) {
3040not_a_reserved_name:
3041 path += i;
3042 continue;
3043 }
3044 break;
3045 case 'c': case 'C':
3046 /* COM1 ... COM9, CON, CONIN$, CONOUT$ */
3047 if ((c = path[++i]) != 'o' && c != 'O')
3048 goto not_a_reserved_name;
3049 c = path[++i];
3050 if (c == 'm' || c == 'M') { /* COM1 ... COM9 */
3051 c = path[++i];
3052 if (c < '1' || c > '9')
3053 goto not_a_reserved_name;
3054 } else if (c == 'n' || c == 'N') { /* CON */
3055 c = path[i + 1];
3056 if ((c == 'i' || c == 'I') &&
3057 ((c = path[i + 2]) == 'n' ||
3058 c == 'N') &&
3059 path[i + 3] == '$')
3060 i += 3; /* CONIN$ */
3061 else if ((c == 'o' || c == 'O') &&
3062 ((c = path[i + 2]) == 'u' ||
3063 c == 'U') &&
3064 ((c = path[i + 3]) == 't' ||
3065 c == 'T') &&
3066 path[i + 4] == '$')
3067 i += 4; /* CONOUT$ */
3068 } else
3069 goto not_a_reserved_name;
3070 break;
3071 case 'l': case 'L': /* LPT<N> */
3072 if (((c = path[++i]) != 'p' && c != 'P') ||
3073 ((c = path[++i]) != 't' && c != 'T') ||
3074 !isdigit(path[++i]))
3075 goto not_a_reserved_name;
3076 break;
3077 case 'n': case 'N': /* NUL */
3078 if (((c = path[++i]) != 'u' && c != 'U') ||
3079 ((c = path[++i]) != 'l' && c != 'L') ||
3080 (allow_literal_nul &&
3081 !path[i + 1] && p == path))
3082 goto not_a_reserved_name;
3083 break;
3084 case 'p': case 'P': /* PRN */
3085 if (((c = path[++i]) != 'r' && c != 'R') ||
3086 ((c = path[++i]) != 'n' && c != 'N'))
3087 goto not_a_reserved_name;
3088 break;
3089 default:
3090 continue;
3091 }
3092
3093 /*
3094 * So far, this looks like a reserved name. Let's see
3095 * whether it actually is one: trailing spaces, a file
3096 * extension, or an NTFS Alternate Data Stream do not
3097 * matter, the name is still reserved if any of those
3098 * follow immediately after the actual name.
3099 */
3100 i++;
3101 if (path[i] == ' ') {
3102 preceding_space_or_period = 1;
3103 while (path[++i] == ' ')
3104 ; /* skip all spaces */
3105 }
3106
3107 c = path[i];
3108 if (c && c != '.' && c != ':' && !is_xplatform_dir_sep(c))
3109 goto not_a_reserved_name;
3110
3111 /* contains reserved name */
3112 return 0;
3113 case '.':
3114 periods++;
3115 /* fallthru */
3116 case ' ':
3117 preceding_space_or_period = 1;
3118 i++;
3119 continue;
3120 case ':': /* DOS drive prefix was already skipped */
3121 case '<': case '>': case '"': case '|': case '?': case '*':
3122 /* illegal character */
3123 return 0;
3124 default:
3125 if (c > '\0' && c < '\x20')
3126 /* illegal character */
3127 return 0;
3128 }
3129 preceding_space_or_period = 0;
3130 i++;
3131 }
3132}
3133
3134#if !defined(_MSC_VER)
3135/*
3136 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
3137 * mingw startup code, see init.c in mingw runtime).
3138 */
3139int _CRT_glob = 0;
3140#endif
3141
3142static NORETURN void die_startup(void)
3143{
3144 fputs("fatal: not enough memory for initialization", stderr);
3145 exit(128);
3146}
3147
3148static void *malloc_startup(size_t size)
3149{
3150 void *result = malloc(size);
3151 if (!result)
3152 die_startup();
3153 return result;
3154}
3155
3156static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
3157{
3158 len = xwcstoutf(buffer, wcs, len) + 1;
3159 return memcpy(malloc_startup(len), buffer, len);
3160}
3161
3162static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
3163 DWORD desired_access, DWORD flags)
3164{
3165 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
3166 wchar_t buf[MAX_PATH];
3167 DWORD max = ARRAY_SIZE(buf);
3168 HANDLE handle;
3169 DWORD ret = GetEnvironmentVariableW(key, buf, max);
3170
3171 if (!ret || ret >= max)
3172 return;
3173
3174 /* make sure this does not leak into child processes */
3175 SetEnvironmentVariableW(key, NULL);
3176 if (!wcscmp(buf, L"off")) {
3177 close(fd);
3178 handle = GetStdHandle(std_id);
3179 if (handle != INVALID_HANDLE_VALUE)
3180 CloseHandle(handle);
3181 return;
3182 }
3183 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
3184 handle = GetStdHandle(STD_OUTPUT_HANDLE);
3185 if (handle == INVALID_HANDLE_VALUE) {
3186 close(fd);
3187 handle = GetStdHandle(std_id);
3188 if (handle != INVALID_HANDLE_VALUE)
3189 CloseHandle(handle);
3190 } else {
3191 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
3192 SetStdHandle(std_id, handle);
3193 dup2(new_fd, fd);
3194 /* do *not* close the new_fd: that would close stdout */
3195 }
3196 return;
3197 }
3198 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
3199 flags, NULL);
3200 if (handle != INVALID_HANDLE_VALUE) {
3201 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
3202 SetStdHandle(std_id, handle);
3203 dup2(new_fd, fd);
3204 close(new_fd);
3205 }
3206}
3207
3208static void maybe_redirect_std_handles(void)
3209{
3210 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
3211 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
3212 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
3213 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
3214 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
3215 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
3216}
3217
3218#ifdef _MSC_VER
3219#ifdef _DEBUG
3220#include <crtdbg.h>
3221#endif
3222#endif
3223
3224/*
3225 * We implement wmain() and compile with -municode, which would
3226 * normally ignore main(), but we call the latter from the former
3227 * so that we can handle non-ASCII command-line parameters
3228 * appropriately.
3229 *
3230 * To be more compatible with the core git code, we convert
3231 * argv into UTF8 and pass them directly to main().
3232 */
3233int wmain(int argc, const wchar_t **wargv)
3234{
3235 int i, exit_status;
3236 size_t maxlen;
3237 char *buffer, **save;
3238 const char **argv;
3239
3240 trace2_initialize_clock();
3241
3242#ifdef _MSC_VER
3243#ifdef _DEBUG
3244 _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
3245#endif
3246
3247#ifdef USE_MSVC_CRTDBG
3248 _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
3249#endif
3250#endif
3251
3252 maybe_redirect_std_handles();
3253
3254 /* determine size of argv and environ conversion buffer */
3255 maxlen = wcslen(wargv[0]);
3256 for (i = 1; i < argc; i++)
3257 maxlen = max(maxlen, wcslen(wargv[i]));
3258
3259 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
3260 maxlen = 3 * maxlen + 1;
3261 buffer = malloc_startup(maxlen);
3262
3263 /*
3264 * Create a UTF-8 version of w_argv. Also create a "save" copy
3265 * to remember all the string pointers because parse_options()
3266 * will remove claimed items from the argv that we pass down.
3267 */
3268 ALLOC_ARRAY(argv, argc + 1);
3269 ALLOC_ARRAY(save, argc + 1);
3270 for (i = 0; i < argc; i++)
3271 argv[i] = save[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
3272 argv[i] = save[i] = NULL;
3273 free(buffer);
3274
3275 /* fix Windows specific environment settings */
3276 setup_windows_environment();
3277
3278 unset_environment_variables = xstrdup("PERL5LIB");
3279
3280 /* initialize critical section for waitpid pinfo_t list */
3281 InitializeCriticalSection(&pinfo_cs);
3282
3283 /* set up default file mode and file modes for stdin/out/err */
3284 _fmode = _O_BINARY;
3285 _setmode(_fileno(stdin), _O_BINARY);
3286 _setmode(_fileno(stdout), _O_BINARY);
3287 _setmode(_fileno(stderr), _O_BINARY);
3288
3289 /* initialize Unicode console */
3290 winansi_init();
3291
3292 /* invoke the real main() using our utf8 version of argv. */
3293 exit_status = main(argc, argv);
3294
3295 for (i = 0; i < argc; i++)
3296 free(save[i]);
3297 free(save);
3298 free(argv);
3299
3300 return exit_status;
3301}
3302
3303int uname(struct utsname *buf)
3304{
3305 unsigned v = (unsigned)GetVersion();
3306 memset(buf, 0, sizeof(*buf));
3307 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
3308 xsnprintf(buf->release, sizeof(buf->release),
3309 "%u.%u", v & 0xff, (v >> 8) & 0xff);
3310 /* assuming NT variants only.. */
3311 xsnprintf(buf->version, sizeof(buf->version),
3312 "%u", (v >> 16) & 0x7fff);
3313 return 0;
3314}
3315
3316#ifndef NO_UNIX_SOCKETS
3317int mingw_have_unix_sockets(void)
3318{
3319 SC_HANDLE scm, srvc;
3320 SERVICE_STATUS_PROCESS status;
3321 DWORD bytes;
3322 int ret = 0;
3323 scm = OpenSCManagerA(NULL, NULL, SC_MANAGER_CONNECT);
3324 if (scm) {
3325 srvc = OpenServiceA(scm, "afunix", SERVICE_QUERY_STATUS);
3326 if (srvc) {
3327 if(QueryServiceStatusEx(srvc, SC_STATUS_PROCESS_INFO, (LPBYTE)&status, sizeof(SERVICE_STATUS_PROCESS), &bytes))
3328 ret = status.dwCurrentState == SERVICE_RUNNING;
3329 CloseServiceHandle(srvc);
3330 }
3331 CloseServiceHandle(scm);
3332 }
3333 return ret;
3334}
3335#endif