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cache.h: remove this no-longer-used header
[thirdparty/git.git] / compat / mingw.c
CommitLineData
f4626df5 1#include "../git-compat-util.h"
444dc903 2#include "win32.h"
bdc77d1d 3#include <aclapi.h>
e883e04b 4#include <sddl.h>
28a559c0 5#include <conio.h>
85faec9d 6#include <wchar.h>
7e5d7768 7#include "../strbuf.h"
c9b78400 8#include "../run-command.h"
0b027f6c 9#include "../abspath.h"
36bf1958 10#include "../alloc.h"
564be791 11#include "win32/lazyload.h"
bdfbb0ea 12#include "../config.h"
32a8f510 13#include "../environment.h"
74ea5c95 14#include "../trace2.h"
cb2a5135 15#include "../symlinks.h"
d5ebb50d 16#include "../wrapper.h"
9e9da23c 17#include "dir.h"
f394e093 18#include "gettext.h"
4a9b2049
MA		 19#define SECURITY_WIN32
20#include <sspi.h>
f4626df5 21
7c00bc39
JS		 22#define HCAST(type, handle) ((type)(intptr_t)handle)
23
19e12549
HV		 24static const int delay[] = { 0, 1, 10, 20, 40 };
25
08809c09
JS		 26void open_in_gdb(void)
27{
28 static struct child_process cp = CHILD_PROCESS_INIT;
29 extern char *_pgmptr;
30
ef8d7ac4
JK		 31 strvec_pushl(&cp.args, "mintty", "gdb", NULL);
32 strvec_pushf(&cp.args, "--pid=%d", getpid());
08809c09
JS		 33 cp.clean_on_exit = 1;
34 if (start_command(&cp) < 0)
35 die_errno("Could not start gdb");
36 sleep(1);
37}
38
44626dc7 39int err_win_to_posix(DWORD winerr)
b3debd2b
PK		 40{
41 int error = ENOSYS;
42 switch(winerr) {
43 case ERROR_ACCESS_DENIED: error = EACCES; break;
44 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
45 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
46 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
47 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
48 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
49 case ERROR_BAD_COMMAND: error = EIO; break;
50 case ERROR_BAD_DEVICE: error = ENODEV; break;
51 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
52 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
53 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
54 case ERROR_BAD_LENGTH: error = EINVAL; break;
55 case ERROR_BAD_PATHNAME: error = ENOENT; break;
56 case ERROR_BAD_PIPE: error = EPIPE; break;
57 case ERROR_BAD_UNIT: error = ENODEV; break;
58 case ERROR_BAD_USERNAME: error = EINVAL; break;
59 case ERROR_BROKEN_PIPE: error = EPIPE; break;
60 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
61 case ERROR_BUSY: error = EBUSY; break;
62 case ERROR_BUSY_DRIVE: error = EBUSY; break;
63 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
64 case ERROR_CANNOT_MAKE: error = EACCES; break;
65 case ERROR_CANTOPEN: error = EIO; break;
66 case ERROR_CANTREAD: error = EIO; break;
67 case ERROR_CANTWRITE: error = EIO; break;
68 case ERROR_CRC: error = EIO; break;
69 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
70 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
71 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
72 case ERROR_DIRECTORY: error = EINVAL; break;
73 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
74 case ERROR_DISK_CHANGE: error = EIO; break;
75 case ERROR_DISK_FULL: error = ENOSPC; break;
76 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
77 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
78 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
79 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
80 case ERROR_FILE_EXISTS: error = EEXIST; break;
81 case ERROR_FILE_INVALID: error = ENODEV; break;
82 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
83 case ERROR_GEN_FAILURE: error = EIO; break;
84 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
85 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
86 case ERROR_INVALID_ACCESS: error = EACCES; break;
87 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
88 case ERROR_INVALID_BLOCK: error = EFAULT; break;
89 case ERROR_INVALID_DATA: error = EINVAL; break;
90 case ERROR_INVALID_DRIVE: error = ENODEV; break;
91 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
92 case ERROR_INVALID_FLAGS: error = EINVAL; break;
93 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
94 case ERROR_INVALID_HANDLE: error = EBADF; break;
95 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
96 case ERROR_INVALID_NAME: error = EINVAL; break;
97 case ERROR_INVALID_OWNER: error = EINVAL; break;
98 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
99 case ERROR_INVALID_PASSWORD: error = EPERM; break;
100 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
101 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
102 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
103 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
104 case ERROR_IO_DEVICE: error = EIO; break;
105 case ERROR_IO_INCOMPLETE: error = EINTR; break;
106 case ERROR_LOCKED: error = EBUSY; break;
107 case ERROR_LOCK_VIOLATION: error = EACCES; break;
108 case ERROR_LOGON_FAILURE: error = EACCES; break;
109 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
110 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
111 case ERROR_MORE_DATA: error = EPIPE; break;
112 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
113 case ERROR_NOACCESS: error = EFAULT; break;
114 case ERROR_NONE_MAPPED: error = EINVAL; break;
115 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
116 case ERROR_NOT_READY: error = EAGAIN; break;
117 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
118 case ERROR_NO_DATA: error = EPIPE; break;
119 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
120 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
121 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
122 case ERROR_OPEN_FAILED: error = EIO; break;
123 case ERROR_OPEN_FILES: error = EBUSY; break;
124 case ERROR_OPERATION_ABORTED: error = EINTR; break;
125 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
126 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
127 case ERROR_PATH_BUSY: error = EBUSY; break;
128 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
129 case ERROR_PIPE_BUSY: error = EBUSY; break;
130 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
131 case ERROR_PIPE_LISTENING: error = EPIPE; break;
132 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
133 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
134 case ERROR_READ_FAULT: error = EIO; break;
135 case ERROR_SEEK: error = EIO; break;
136 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
137 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
138 case ERROR_SHARING_VIOLATION: error = EACCES; break;
139 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
3ba3720b 140 case ERROR_SUCCESS: BUG("err_win_to_posix() called without an error!");
b3debd2b
PK		 141 case ERROR_SWAPERROR: error = ENOENT; break;
142 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
143 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
144 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
145 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
146 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
147 case ERROR_WRITE_FAULT: error = EIO; break;
148 case ERROR_WRITE_PROTECT: error = EROFS; break;
149 }
150 return error;
151}
152
19e12549
HV		 153static inline int is_file_in_use_error(DWORD errcode)
154{
155 switch (errcode) {
156 case ERROR_SHARING_VIOLATION:
157 case ERROR_ACCESS_DENIED:
158 return 1;
159 }
160
161 return 0;
162}
163
c9b78400
HV		 164static int read_yes_no_answer(void)
165{
166 char answer[1024];
167
168 if (fgets(answer, sizeof(answer), stdin)) {
169 size_t answer_len = strlen(answer);
170 int got_full_line = 0, c;
171
172 /* remove the newline */
173 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
174 answer[answer_len-2] = '\0';
175 got_full_line = 1;
176 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
177 answer[answer_len-1] = '\0';
178 got_full_line = 1;
179 }
180 /* flush the buffer in case we did not get the full line */
181 if (!got_full_line)
182 while ((c = getchar()) != EOF && c != '\n')
183 ;
184 } else
185 /* we could not read, return the
186 * default answer which is no */
187 return 0;
188
189 if (tolower(answer[0]) == 'y' && !answer[1])
190 return 1;
191 if (!strncasecmp(answer, "yes", sizeof(answer)))
192 return 1;
193 if (tolower(answer[0]) == 'n' && !answer[1])
194 return 0;
195 if (!strncasecmp(answer, "no", sizeof(answer)))
196 return 0;
197
198 /* did not find an answer we understand */
199 return -1;
200}
201
202static int ask_yes_no_if_possible(const char *format, ...)
203{
204 char question[4096];
4120294c 205 const char *retry_hook;
c9b78400
HV		 206 va_list args;
207
208 va_start(args, format);
209 vsnprintf(question, sizeof(question), format, args);
210 va_end(args);
211
4120294c
RS		 212 retry_hook = mingw_getenv("GIT_ASK_YESNO");
213 if (retry_hook) {
214 struct child_process cmd = CHILD_PROCESS_INIT;
215
216 strvec_pushl(&cmd.args, retry_hook, question, NULL);
217 return !run_command(&cmd);
c9b78400
HV		 218 }
219
220 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
221 return 0;
222
223 while (1) {
224 int answer;
225 fprintf(stderr, "%s (y/n) ", question);
226
227 if ((answer = read_yes_no_answer()) >= 0)
228 return answer;
229
230 fprintf(stderr, "Sorry, I did not understand your answer. "
231 "Please type 'y' or 'n'\n");
232 }
233}
234
bdfbb0ea
JS		 235/* Windows only */
236enum hide_dotfiles_type {
237 HIDE_DOTFILES_FALSE = 0,
238 HIDE_DOTFILES_TRUE,
239 HIDE_DOTFILES_DOTGITONLY
240};
241
ac33519d 242static int core_restrict_inherited_handles = -1;
bdfbb0ea 243static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
0e218f91 244static char *unset_environment_variables;
bdfbb0ea 245
70fc5793
JS		 246int mingw_core_config(const char *var, const char *value, void *cb)
247{
bdfbb0ea
JS		 248 if (!strcmp(var, "core.hidedotfiles")) {
249 if (value && !strcasecmp(value, "dotgitonly"))
250 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
251 else
252 hide_dotfiles = git_config_bool(var, value);
253 return 0;
254 }
255
0e218f91
JS		 256 if (!strcmp(var, "core.unsetenvvars")) {
257 free(unset_environment_variables);
258 unset_environment_variables = xstrdup(value);
259 return 0;
260 }
261
ac33519d
JS		 262 if (!strcmp(var, "core.restrictinheritedhandles")) {
263 if (value && !strcasecmp(value, "auto"))
264 core_restrict_inherited_handles = -1;
265 else
266 core_restrict_inherited_handles =
267 git_config_bool(var, value);
268 return 0;
269 }
270
70fc5793
JS		 271 return 0;
272}
273
4745feeb
AS		 274/* Normalizes NT paths as returned by some low-level APIs. */
275static wchar_t *normalize_ntpath(wchar_t *wbuf)
276{
277 int i;
278 /* fix absolute path prefixes */
279 if (wbuf[0] == '\\') {
280 /* strip NT namespace prefixes */
281 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
282 !wcsncmp(wbuf, L"\\\\?\\", 4))
283 wbuf += 4;
284 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
285 wbuf += 12;
286 /* replace remaining '...UNC\' with '\\' */
287 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
288 wbuf += 2;
289 *wbuf = '\\';
290 }
291 }
292 /* convert backslashes to slashes */
293 for (i = 0; wbuf[i]; i++)
294 if (wbuf[i] == '\\')
295 wbuf[i] = '/';
296 return wbuf;
297}
298
337967fb
HV		 299int mingw_unlink(const char *pathname)
300{
19e12549 301 int ret, tries = 0;
85faec9d
KB		 302 wchar_t wpathname[MAX_PATH];
303 if (xutftowcs_path(wpathname, pathname) < 0)
304 return -1;
19e12549 305
680e0b45
JH		 306 if (DeleteFileW(wpathname))
307 return 0;
308
337967fb 309 /* read-only files cannot be removed */
85faec9d
KB		 310 _wchmod(wpathname, 0666);
311 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
19e12549
HV		 312 if (!is_file_in_use_error(GetLastError()))
313 break;
314 /*
315 * We assume that some other process had the source or
316 * destination file open at the wrong moment and retry.
317 * In order to give the other process a higher chance to
318 * complete its operation, we give up our time slice now.
319 * If we have to retry again, we do sleep a bit.
320 */
321 Sleep(delay[tries]);
322 tries++;
323 }
c9b78400
HV		 324 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
325 ask_yes_no_if_possible("Unlink of file '%s' failed. "
326 "Should I try again?", pathname))
85faec9d 327 ret = _wunlink(wpathname);
19e12549 328 return ret;
337967fb
HV		 329}
330
85faec9d 331static int is_dir_empty(const wchar_t *wpath)
ab1a11be 332{
85faec9d 333 WIN32_FIND_DATAW findbuf;
ab1a11be 334 HANDLE handle;
85faec9d
KB		 335 wchar_t wbuf[MAX_PATH + 2];
336 wcscpy(wbuf, wpath);
337 wcscat(wbuf, L"\\*");
338 handle = FindFirstFileW(wbuf, &findbuf);
339 if (handle == INVALID_HANDLE_VALUE)
ab1a11be 340 return GetLastError() == ERROR_NO_MORE_FILES;
ab1a11be 341
85faec9d
KB		 342 while (!wcscmp(findbuf.cFileName, L".") ||
343 !wcscmp(findbuf.cFileName, L".."))
344 if (!FindNextFileW(handle, &findbuf)) {
345 DWORD err = GetLastError();
346 FindClose(handle);
347 return err == ERROR_NO_MORE_FILES;
ab1a11be
JS		 348 }
349 FindClose(handle);
ab1a11be
JS		 350 return 0;
351}
352
4f288100
HV		 353int mingw_rmdir(const char *pathname)
354{
355 int ret, tries = 0;
85faec9d 356 wchar_t wpathname[MAX_PATH];
3e7d4888
TB		 357 struct stat st;
358
359 /*
360 * Contrary to Linux' `rmdir()`, Windows' _wrmdir() and _rmdir()
361 * (and `RemoveDirectoryW()`) will attempt to remove the target of a
362 * symbolic link (if it points to a directory).
363 *
364 * This behavior breaks the assumption of e.g. `remove_path()` which
365 * upon successful deletion of a file will attempt to remove its parent
366 * directories recursively until failure (which usually happens when
367 * the directory is not empty).
368 *
369 * Therefore, before calling `_wrmdir()`, we first check if the path is
370 * a symbolic link. If it is, we exit and return the same error as
371 * Linux' `rmdir()` would, i.e. `ENOTDIR`.
372 */
373 if (!mingw_lstat(pathname, &st) && S_ISLNK(st.st_mode)) {
374 errno = ENOTDIR;
375 return -1;
376 }
377
85faec9d
KB		 378 if (xutftowcs_path(wpathname, pathname) < 0)
379 return -1;
4f288100 380
85faec9d 381 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
4f288100 382 if (!is_file_in_use_error(GetLastError()))
a83b2b57
EFL		 383 errno = err_win_to_posix(GetLastError());
384 if (errno != EACCES)
4f288100 385 break;
85faec9d 386 if (!is_dir_empty(wpathname)) {
ab1a11be
JS		 387 errno = ENOTEMPTY;
388 break;
389 }
4f288100
HV		 390 /*
391 * We assume that some other process had the source or
392 * destination file open at the wrong moment and retry.
393 * In order to give the other process a higher chance to
394 * complete its operation, we give up our time slice now.
395 * If we have to retry again, we do sleep a bit.
396 */
397 Sleep(delay[tries]);
398 tries++;
399 }
a83b2b57 400 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
4f288100
HV		 401 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
402 "Should I try again?", pathname))
85faec9d 403 ret = _wrmdir(wpathname);
684dd4c2
MT		 404 if (!ret)
405 invalidate_lstat_cache();
85faec9d
KB		 406 return ret;
407}
408
f30afdab
JS		 409static inline int needs_hiding(const char *path)
410{
411 const char *basename;
412
413 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
414 return 0;
415
416 /* We cannot use basename(), as it would remove trailing slashes */
1cadad6f 417 win32_skip_dos_drive_prefix((char **)&path);
f30afdab
JS		 418 if (!*path)
419 return 0;
420
421 for (basename = path; *path; path++)
422 if (is_dir_sep(*path)) {
423 do {
424 path++;
425 } while (is_dir_sep(*path));
426 /* ignore trailing slashes */
427 if (*path)
428 basename = path;
60e6569a
JS		 429 else
430 break;
f30afdab
JS		 431 }
432
433 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
434 return *basename == '.';
435
436 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
437 return !strncasecmp(".git", basename, 4) &&
438 (!basename[4] || is_dir_sep(basename[4]));
439}
440
441static int set_hidden_flag(const wchar_t *path, int set)
442{
443 DWORD original = GetFileAttributesW(path), modified;
444 if (set)
445 modified = original | FILE_ATTRIBUTE_HIDDEN;
446 else
447 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
448 if (original == modified || SetFileAttributesW(path, modified))
449 return 0;
450 errno = err_win_to_posix(GetLastError());
451 return -1;
452}
453
85faec9d
KB		 454int mingw_mkdir(const char *path, int mode)
455{
456 int ret;
457 wchar_t wpath[MAX_PATH];
d2c84dad 458
4dc42c6c 459 if (!is_valid_win32_path(path, 0)) {
d2c84dad
JS		 460 errno = EINVAL;
461 return -1;
462 }
463
85faec9d
KB		 464 if (xutftowcs_path(wpath, path) < 0)
465 return -1;
466 ret = _wmkdir(wpath);
f30afdab
JS		 467 if (!ret && needs_hiding(path))
468 return set_hidden_flag(wpath, 1);
4f288100
HV		 469 return ret;
470}
471
eeaf7dda
JH		 472/*
473 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
474 * is documented in [1] as opening a writable file handle in append mode.
475 * (It is believed that) this is atomic since it is maintained by the
476 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
477 *
478 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
479 *
480 * This trick does not appear to work for named pipes. Instead it creates
481 * a named pipe client handle that cannot be written to. Callers should
482 * just use the regular _wopen() for them. (And since client handle gets
483 * bound to a unique server handle, it isn't really an issue.)
484 */
d6410975
JS		 485static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
486{
487 HANDLE handle;
488 int fd;
489 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
490
491 /* only these flags are supported */
492 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
493 return errno = ENOSYS, -1;
494
495 /*
496 * FILE_SHARE_WRITE is required to permit child processes
497 * to append to the file.
498 */
499 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
500 FILE_SHARE_WRITE | FILE_SHARE_READ,
501 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
23eafd92
NS		 502 if (handle == INVALID_HANDLE_VALUE) {
503 DWORD err = GetLastError();
504
505 /*
506 * Some network storage solutions (e.g. Isilon) might return
507 * ERROR_INVALID_PARAMETER instead of expected error
508 * ERROR_PATH_NOT_FOUND, which results in an unknown error. If
509 * so, let's turn the error to ERROR_PATH_NOT_FOUND instead.
510 */
511 if (err == ERROR_INVALID_PARAMETER)
512 err = ERROR_PATH_NOT_FOUND;
513
514 errno = err_win_to_posix(err);
515 return -1;
516 }
eeaf7dda 517
d6410975
JS		 518 /*
519 * No O_APPEND here, because the CRT uses it only to reset the
eeaf7dda
JH		 520 * file pointer to EOF before each write(); but that is not
521 * necessary (and may lead to races) for a file created with
522 * FILE_APPEND_DATA.
d6410975
JS		 523 */
524 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
525 if (fd < 0)
526 CloseHandle(handle);
527 return fd;
528}
529
eeaf7dda
JH		 530/*
531 * Does the pathname map to the local named pipe filesystem?
532 * That is, does it have a "//./pipe/" prefix?
533 */
534static int is_local_named_pipe_path(const char *filename)
535{
536 return (is_dir_sep(filename[0]) &&
537 is_dir_sep(filename[1]) &&
538 filename[2] == '.' &&
539 is_dir_sep(filename[3]) &&
540 !strncasecmp(filename+4, "pipe", 4) &&
541 is_dir_sep(filename[8]) &&
542 filename[9]);
543}
544
3e4a1ba0
JS		 545int mingw_open (const char *filename, int oflags, ...)
546{
d6410975 547 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
3e4a1ba0
JS		 548 va_list args;
549 unsigned mode;
d2c84dad 550 int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
85faec9d 551 wchar_t wfilename[MAX_PATH];
d6410975 552 open_fn_t open_fn;
0d30ad71 553
3e4a1ba0
JS		 554 va_start(args, oflags);
555 mode = va_arg(args, int);
556 va_end(args);
557
4dc42c6c 558 if (!is_valid_win32_path(filename, !create)) {
d2c84dad
JS		 559 errno = create ? EINVAL : ENOENT;
560 return -1;
561 }
562
eeaf7dda 563 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
d6410975
JS		 564 open_fn = mingw_open_append;
565 else
566 open_fn = _wopen;
567
98d9b23e
JS		 568 if (filename && !strcmp(filename, "/dev/null"))
569 wcscpy(wfilename, L"nul");
570 else if (xutftowcs_path(wfilename, filename) < 0)
85faec9d 571 return -1;
98d9b23e 572
d6410975 573 fd = open_fn(wfilename, oflags, mode);
0d30ad71 574
ba6fad02 575 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
85faec9d 576 DWORD attrs = GetFileAttributesW(wfilename);
3e4a1ba0
JS		 577 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
578 errno = EISDIR;
579 }
f30afdab
JS		 580 if ((oflags & O_CREAT) && needs_hiding(filename)) {
581 /*
582 * Internally, _wopen() uses the CreateFile() API which errors
583 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
584 * specified and an already existing file's attributes do not
585 * match *exactly*. As there is no mode or flag we can set that
586 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
587 * again *without* the O_CREAT flag (that corresponds to the
588 * CREATE_ALWAYS flag of CreateFile()).
589 */
590 if (fd < 0 && errno == EACCES)
d6410975 591 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
f30afdab
JS		 592 if (fd >= 0 && set_hidden_flag(wfilename, 1))
593 warning("could not mark '%s' as hidden.", filename);
594 }
3e4a1ba0
JS		 595 return fd;
596}
597
176478a8
EFL		 598static BOOL WINAPI ctrl_ignore(DWORD type)
599{
600 return TRUE;
601}
602
603#undef fgetc
604int mingw_fgetc(FILE *stream)
605{
606 int ch;
607 if (!isatty(_fileno(stream)))
608 return fgetc(stream);
609
610 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
611 while (1) {
612 ch = fgetc(stream);
613 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
614 break;
615
616 /* Ctrl+C was pressed, simulate SIGINT and retry */
617 mingw_raise(SIGINT);
618 }
619 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
620 return ch;
621}
622
3fdcdbdf
JS		 623#undef fopen
624FILE *mingw_fopen (const char *filename, const char *otype)
625{
f30afdab 626 int hide = needs_hiding(filename);
85faec9d
KB		 627 FILE *file;
628 wchar_t wfilename[MAX_PATH], wotype[4];
4dc42c6c
JS		 629 if (filename && !strcmp(filename, "/dev/null"))
630 wcscpy(wfilename, L"nul");
631 else if (!is_valid_win32_path(filename, 1)) {
d2c84dad
JS		 632 int create = otype && strchr(otype, 'w');
633 errno = create ? EINVAL : ENOENT;
634 return NULL;
4dc42c6c 635 } else if (xutftowcs_path(wfilename, filename) < 0)
85faec9d 636 return NULL;
98d9b23e
JS		 637
638 if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
85faec9d 639 return NULL;
98d9b23e 640
f30afdab
JS		 641 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
642 error("could not unhide %s", filename);
643 return NULL;
644 }
85faec9d 645 file = _wfopen(wfilename, wotype);
e5b31344
JS		 646 if (!file && GetLastError() == ERROR_INVALID_NAME)
647 errno = ENOENT;
f30afdab
JS		 648 if (file && hide && set_hidden_flag(wfilename, 1))
649 warning("could not mark '%s' as hidden.", filename);
85faec9d 650 return file;
3fdcdbdf
JS		 651}
652
3fdcdbdf
JS		 653FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
654{
f30afdab 655 int hide = needs_hiding(filename);
85faec9d
KB		 656 FILE *file;
657 wchar_t wfilename[MAX_PATH], wotype[4];
4dc42c6c
JS		 658 if (filename && !strcmp(filename, "/dev/null"))
659 wcscpy(wfilename, L"nul");
660 else if (!is_valid_win32_path(filename, 1)) {
d2c84dad
JS		 661 int create = otype && strchr(otype, 'w');
662 errno = create ? EINVAL : ENOENT;
663 return NULL;
4dc42c6c 664 } else if (xutftowcs_path(wfilename, filename) < 0)
85faec9d 665 return NULL;
98d9b23e
JS		 666
667 if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
85faec9d 668 return NULL;
98d9b23e 669
f30afdab
JS		 670 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
671 error("could not unhide %s", filename);
672 return NULL;
673 }
85faec9d 674 file = _wfreopen(wfilename, wotype, stream);
f30afdab
JS		 675 if (file && hide && set_hidden_flag(wfilename, 1))
676 warning("could not mark '%s' as hidden.", filename);
85faec9d 677 return file;
3fdcdbdf
JS		 678}
679
84adb641
JS		 680#undef fflush
681int mingw_fflush(FILE *stream)
682{
683 int ret = fflush(stream);
684
685 /*
686 * write() is used behind the scenes of stdio output functions.
687 * Since git code does not check for errors after each stdio write
688 * operation, it can happen that write() is called by a later
689 * stdio function even if an earlier write() call failed. In the
690 * case of a pipe whose readable end was closed, only the first
691 * call to write() reports EPIPE on Windows. Subsequent write()
692 * calls report EINVAL. It is impossible to notice whether this
693 * fflush invocation triggered such a case, therefore, we have to
694 * catch all EINVAL errors whole-sale.
695 */
696 if (ret && errno == EINVAL)
697 errno = EPIPE;
698
699 return ret;
700}
701
2b86292e
JS		 702#undef write
703ssize_t mingw_write(int fd, const void *buf, size_t len)
704{
705 ssize_t result = write(fd, buf, len);
706
707 if (result < 0 && errno == EINVAL && buf) {
708 /* check if fd is a pipe */
709 HANDLE h = (HANDLE) _get_osfhandle(fd);
710 if (GetFileType(h) == FILE_TYPE_PIPE)
711 errno = EPIPE;
712 else
713 errno = EINVAL;
714 }
715
716 return result;
717}
718
85faec9d
KB		 719int mingw_access(const char *filename, int mode)
720{
721 wchar_t wfilename[MAX_PATH];
9160068a
JS		 722 if (!strcmp("nul", filename) || !strcmp("/dev/null", filename))
723 return 0;
85faec9d
KB		 724 if (xutftowcs_path(wfilename, filename) < 0)
725 return -1;
726 /* X_OK is not supported by the MSVCRT version */
727 return _waccess(wfilename, mode & ~X_OK);
728}
729
730int mingw_chdir(const char *dirname)
731{
732 wchar_t wdirname[MAX_PATH];
733 if (xutftowcs_path(wdirname, dirname) < 0)
734 return -1;
735 return _wchdir(wdirname);
736}
737
738int mingw_chmod(const char *filename, int mode)
739{
740 wchar_t wfilename[MAX_PATH];
741 if (xutftowcs_path(wfilename, filename) < 0)
742 return -1;
743 return _wchmod(wfilename, mode);
744}
745
a6d15bc3
JS		 746/*
747 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
748 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
749 */
750static inline long long filetime_to_hnsec(const FILETIME *ft)
5411bdc4
MSO		 751{
752 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
a6d15bc3
JS		 753 /* Windows to Unix Epoch conversion */
754 return winTime - 116444736000000000LL;
755}
756
d7e8c874 757static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts)
a6d15bc3 758{
d7e8c874
KB		 759 long long hnsec = filetime_to_hnsec(ft);
760 ts->tv_sec = (time_t)(hnsec / 10000000);
761 ts->tv_nsec = (hnsec % 10000000) * 100;
5411bdc4
MSO		 762}
763
4b0abd5c
JS		 764/**
765 * Verifies that safe_create_leading_directories() would succeed.
766 */
767static int has_valid_directory_prefix(wchar_t *wfilename)
768{
769 int n = wcslen(wfilename);
770
771 while (n > 0) {
772 wchar_t c = wfilename[--n];
773 DWORD attributes;
774
775 if (!is_dir_sep(c))
776 continue;
777
778 wfilename[n] = L'\0';
779 attributes = GetFileAttributesW(wfilename);
780 wfilename[n] = c;
82ba1191
JS		 781 if (attributes &
782 (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))
4b0abd5c
JS		 783 return 1;
784 if (attributes == INVALID_FILE_ATTRIBUTES)
785 switch (GetLastError()) {
786 case ERROR_PATH_NOT_FOUND:
787 continue;
788 case ERROR_FILE_NOT_FOUND:
789 /* This implies parent directory exists. */
790 return 1;
791 }
792 return 0;
793 }
794 return 1;
795}
796
5411bdc4
MSO		 797/* We keep the do_lstat code in a separate function to avoid recursion.
798 * When a path ends with a slash, the stat will fail with ENOENT. In
799 * this case, we strip the trailing slashes and stat again.
9b9784ca
PT		 800 *
801 * If follow is true then act like stat() and report on the link
802 * target. Otherwise report on the link itself.
5411bdc4 803 */
9b9784ca 804static int do_lstat(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 805{
806 WIN32_FILE_ATTRIBUTE_DATA fdata;
85faec9d
KB		 807 wchar_t wfilename[MAX_PATH];
808 if (xutftowcs_path(wfilename, file_name) < 0)
809 return -1;
5411bdc4 810
85faec9d 811 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
5411bdc4
MSO		 812 buf->st_ino = 0;
813 buf->st_gid = 0;
814 buf->st_uid = 0;
180964f0 815 buf->st_nlink = 1;
444dc903 816 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 817 buf->st_size = fdata.nFileSizeLow |
818 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 819 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
d7e8c874
KB		 820 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
821 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
822 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
9b9784ca 823 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
85faec9d
KB		 824 WIN32_FIND_DATAW findbuf;
825 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
9b9784ca
PT		 826 if (handle != INVALID_HANDLE_VALUE) {
827 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
828 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
829 if (follow) {
830 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
831 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
832 } else {
833 buf->st_mode = S_IFLNK;
834 }
835 buf->st_mode |= S_IREAD;
836 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
837 buf->st_mode |= S_IWRITE;
838 }
839 FindClose(handle);
840 }
841 }
5411bdc4
MSO		 842 return 0;
843 }
85faec9d
KB		 844 switch (GetLastError()) {
845 case ERROR_ACCESS_DENIED:
846 case ERROR_SHARING_VIOLATION:
847 case ERROR_LOCK_VIOLATION:
848 case ERROR_SHARING_BUFFER_EXCEEDED:
849 errno = EACCES;
850 break;
851 case ERROR_BUFFER_OVERFLOW:
852 errno = ENAMETOOLONG;
853 break;
854 case ERROR_NOT_ENOUGH_MEMORY:
855 errno = ENOMEM;
856 break;
4b0abd5c
JS		 857 case ERROR_PATH_NOT_FOUND:
858 if (!has_valid_directory_prefix(wfilename)) {
859 errno = ENOTDIR;
860 break;
861 }
862 /* fallthru */
85faec9d
KB		 863 default:
864 errno = ENOENT;
865 break;
866 }
5411bdc4
MSO		 867 return -1;
868}
869
870/* We provide our own lstat/fstat functions, since the provided
871 * lstat/fstat functions are so slow. These stat functions are
872 * tailored for Git's usage (read: fast), and are not meant to be
873 * complete. Note that Git stat()s are redirected to mingw_lstat()
874 * too, since Windows doesn't really handle symlinks that well.
875 */
9b9784ca 876static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 877{
878 int namelen;
58aa3d2a 879 char alt_name[PATH_MAX];
5411bdc4 880
9b9784ca 881 if (!do_lstat(follow, file_name, buf))
5411bdc4
MSO		 882 return 0;
883
884 /* if file_name ended in a '/', Windows returned ENOENT;
885 * try again without trailing slashes
886 */
887 if (errno != ENOENT)
888 return -1;
889
890 namelen = strlen(file_name);
891 if (namelen && file_name[namelen-1] != '/')
892 return -1;
893 while (namelen && file_name[namelen-1] == '/')
894 --namelen;
895 if (!namelen || namelen >= PATH_MAX)
896 return -1;
897
898 memcpy(alt_name, file_name, namelen);
899 alt_name[namelen] = 0;
9b9784ca
PT		 900 return do_lstat(follow, alt_name, buf);
901}
902
7bf19838
JS		 903static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
904{
905 BY_HANDLE_FILE_INFORMATION fdata;
906
907 if (!GetFileInformationByHandle(hnd, &fdata)) {
908 errno = err_win_to_posix(GetLastError());
909 return -1;
910 }
911
912 buf->st_ino = 0;
913 buf->st_gid = 0;
914 buf->st_uid = 0;
915 buf->st_nlink = 1;
916 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
917 buf->st_size = fdata.nFileSizeLow |
918 (((off_t)fdata.nFileSizeHigh)<<32);
919 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
d7e8c874
KB		 920 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
921 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
922 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
7bf19838
JS		 923 return 0;
924}
925
9b9784ca
PT		 926int mingw_lstat(const char *file_name, struct stat *buf)
927{
928 return do_stat_internal(0, file_name, buf);
929}
930int mingw_stat(const char *file_name, struct stat *buf)
931{
932 return do_stat_internal(1, file_name, buf);
5411bdc4
MSO		 933}
934
180964f0 935int mingw_fstat(int fd, struct stat *buf)
5411bdc4
MSO		 936{
937 HANDLE fh = (HANDLE)_get_osfhandle(fd);
d75e6973 938 DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
5411bdc4 939
d75e6973
KB		 940 switch (type) {
941 case FILE_TYPE_DISK:
942 return get_file_info_by_handle(fh, buf);
5411bdc4 943
d75e6973
KB		 944 case FILE_TYPE_CHAR:
945 case FILE_TYPE_PIPE:
946 /* initialize stat fields */
947 memset(buf, 0, sizeof(*buf));
180964f0 948 buf->st_nlink = 1;
d75e6973
KB		 949
950 if (type == FILE_TYPE_CHAR) {
951 buf->st_mode = _S_IFCHR;
952 } else {
953 buf->st_mode = _S_IFIFO;
954 if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
955 buf->st_size = avail;
956 }
5411bdc4 957 return 0;
7bf19838 958
d75e6973
KB		 959 default:
960 errno = EBADF;
961 return -1;
5411bdc4 962 }
5411bdc4
MSO		 963}
964
7c0ffa1c
JS		 965static inline void time_t_to_filetime(time_t t, FILETIME *ft)
966{
967 long long winTime = t * 10000000LL + 116444736000000000LL;
968 ft->dwLowDateTime = winTime;
969 ft->dwHighDateTime = winTime >> 32;
970}
971
972int mingw_utime (const char *file_name, const struct utimbuf *times)
973{
974 FILETIME mft, aft;
090a3085 975 int rc;
85faec9d
KB		 976 DWORD attrs;
977 wchar_t wfilename[MAX_PATH];
090a3085
TK		 978 HANDLE osfilehandle;
979
85faec9d
KB		 980 if (xutftowcs_path(wfilename, file_name) < 0)
981 return -1;
7c0ffa1c
JS		 982
983 /* must have write permission */
85faec9d 984 attrs = GetFileAttributesW(wfilename);
852f098c
JS		 985 if (attrs != INVALID_FILE_ATTRIBUTES &&
986 (attrs & FILE_ATTRIBUTE_READONLY)) {
987 /* ignore errors here; open() will report them */
85faec9d 988 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
852f098c
JS		 989 }
990
090a3085
TK		 991 osfilehandle = CreateFileW(wfilename,
992 FILE_WRITE_ATTRIBUTES,
993 0 /*FileShare.None*/,
994 NULL,
995 OPEN_EXISTING,
996 (attrs != INVALID_FILE_ATTRIBUTES &&
997 (attrs & FILE_ATTRIBUTE_DIRECTORY)) ?
998 FILE_FLAG_BACKUP_SEMANTICS : 0,
999 NULL);
1000 if (osfilehandle == INVALID_HANDLE_VALUE) {
1001 errno = err_win_to_posix(GetLastError());
852f098c
JS		 1002 rc = -1;
1003 goto revert_attrs;
1004 }
7c0ffa1c 1005
ded2d476
SG		 1006 if (times) {
1007 time_t_to_filetime(times->modtime, &mft);
1008 time_t_to_filetime(times->actime, &aft);
1009 } else {
1010 GetSystemTimeAsFileTime(&mft);
1011 aft = mft;
1012 }
090a3085
TK		 1013
1014 if (!SetFileTime(osfilehandle, NULL, &aft, &mft)) {
7c0ffa1c
JS		 1015 errno = EINVAL;
1016 rc = -1;
1017 } else
1018 rc = 0;
090a3085
TK		 1019
1020 if (osfilehandle != INVALID_HANDLE_VALUE)
1021 CloseHandle(osfilehandle);
852f098c
JS		 1022
1023revert_attrs:
1024 if (attrs != INVALID_FILE_ATTRIBUTES &&
1025 (attrs & FILE_ATTRIBUTE_READONLY)) {
1026 /* ignore errors again */
85faec9d 1027 SetFileAttributesW(wfilename, attrs);
852f098c 1028 }
7c0ffa1c
JS		 1029 return rc;
1030}
1031
9ee0540a
JS		 1032#undef strftime
1033size_t mingw_strftime(char *s, size_t max,
1034 const char *format, const struct tm *tm)
1035{
a748f3f3
MA		 1036 /* a pointer to the original strftime in case we can't find the UCRT version */
1037 static size_t (*fallback)(char *, size_t, const char *, const struct tm *) = strftime;
1038 size_t ret;
4a9b2049 1039 DECLARE_PROC_ADDR(ucrtbase.dll, size_t, __cdecl, strftime, char *, size_t,
a748f3f3
MA		 1040 const char *, const struct tm *);
1041
1042 if (INIT_PROC_ADDR(strftime))
1043 ret = strftime(s, max, format, tm);
1044 else
1045 ret = fallback(s, max, format, tm);
9ee0540a
JS		 1046
1047 if (!ret && errno == EINVAL)
1048 die("invalid strftime format: '%s'", format);
1049 return ret;
1050}
1051
f4626df5
JS		 1052unsigned int sleep (unsigned int seconds)
1053{
1054 Sleep(seconds*1000);
1055 return 0;
1056}
1057
85faec9d
KB		 1058char *mingw_mktemp(char *template)
1059{
1060 wchar_t wtemplate[MAX_PATH];
1061 if (xutftowcs_path(wtemplate, template) < 0)
1062 return NULL;
1063 if (!_wmktemp(wtemplate))
1064 return NULL;
1065 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
1066 return NULL;
1067 return template;
1068}
1069
f4626df5
JS		 1070int mkstemp(char *template)
1071{
ae25974d 1072 return git_mkstemp_mode(template, 0600);
f4626df5
JS		 1073}
1074
1075int gettimeofday(struct timeval *tv, void *tz)
1076{
a6d15bc3
JS		 1077 FILETIME ft;
1078 long long hnsec;
1079
1080 GetSystemTimeAsFileTime(&ft);
1081 hnsec = filetime_to_hnsec(&ft);
1082 tv->tv_sec = hnsec / 10000000;
1083 tv->tv_usec = (hnsec % 10000000) / 10;
a42a0c2e 1084 return 0;
f4626df5
JS		 1085}
1086
897bb8cb
JS		 1087int pipe(int filedes[2])
1088{
3e34d665 1089 HANDLE h[2];
897bb8cb 1090
3e34d665
JS		 1091 /* this creates non-inheritable handles */
1092 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
1093 errno = err_win_to_posix(GetLastError());
897bb8cb
JS		 1094 return -1;
1095 }
7c00bc39 1096 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
3e34d665 1097 if (filedes[0] < 0) {
897bb8cb
JS		 1098 CloseHandle(h[0]);
1099 CloseHandle(h[1]);
1100 return -1;
1101 }
7c00bc39 1102 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
c3cb7b6f 1103 if (filedes[1] < 0) {
897bb8cb 1104 close(filedes[0]);
897bb8cb
JS		 1105 CloseHandle(h[1]);
1106 return -1;
1107 }
897bb8cb
JS		 1108 return 0;
1109}
1110
9e12400d 1111#ifndef __MINGW64__
f4626df5
JS		 1112struct tm *gmtime_r(const time_t *timep, struct tm *result)
1113{
0109d676
ĐTCD		 1114 if (gmtime_s(result, timep) == 0)
1115 return result;
1116 return NULL;
f4626df5
JS		 1117}
1118
1119struct tm *localtime_r(const time_t *timep, struct tm *result)
1120{
0109d676
ĐTCD		 1121 if (localtime_s(result, timep) == 0)
1122 return result;
1123 return NULL;
f4626df5 1124}
9e12400d 1125#endif
f4626df5 1126
25fe217b
JS		 1127char *mingw_getcwd(char *pointer, int len)
1128{
937974fc
JS		 1129 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
1130 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
1131
1132 if (!ret || ret >= ARRAY_SIZE(cwd)) {
1133 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
1134 return NULL;
1135 }
1136 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
4745feeb
AS		 1137 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
1138 HANDLE hnd = CreateFileW(cwd, 0,
1139 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
1140 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
1141 if (hnd == INVALID_HANDLE_VALUE)
1142 return NULL;
1143 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
1144 CloseHandle(hnd);
1145 if (!ret || ret >= ARRAY_SIZE(wpointer))
1146 return NULL;
1147 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
1148 return NULL;
1149 return pointer;
1150 }
937974fc 1151 if (!ret || ret >= ARRAY_SIZE(wpointer))
85faec9d 1152 return NULL;
e2724c1e
JS		 1153 if (GetFileAttributesW(wpointer) == INVALID_FILE_ATTRIBUTES) {
1154 errno = ENOENT;
1155 return NULL;
1156 }
85faec9d
KB		 1157 if (xwcstoutf(pointer, wpointer, len) < 0)
1158 return NULL;
8e9b2080 1159 convert_slashes(pointer);
85faec9d 1160 return pointer;
25fe217b
JS		 1161}
1162
7e5d7768 1163/*
2ef2ae29
JS		 1164 * See "Parsing C++ Command-Line Arguments" at Microsoft's Docs:
1165 * https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments
7e5d7768 1166 */
9e9da23c 1167static const char *quote_arg_msvc(const char *arg)
7e5d7768
JS		 1168{
1169 /* count chars to quote */
1170 int len = 0, n = 0;
1171 int force_quotes = 0;
1172 char *q, *d;
1173 const char *p = arg;
1174 if (!*p) force_quotes = 1;
1175 while (*p) {
3aea1a5a 1176 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
7e5d7768
JS		 1177 force_quotes = 1;
1178 else if (*p == '"')
1179 n++;
1180 else if (*p == '\\') {
1181 int count = 0;
1182 while (*p == '\\') {
1183 count++;
1184 p++;
1185 len++;
1186 }
6d868416 1187 if (*p == '"' || !*p)
7e5d7768
JS		 1188 n += count*2 + 1;
1189 continue;
1190 }
1191 len++;
1192 p++;
1193 }
1194 if (!force_quotes && n == 0)
1195 return arg;
1196
1197 /* insert \ where necessary */
50a6c8ef 1198 d = q = xmalloc(st_add3(len, n, 3));
7e5d7768
JS		 1199 *d++ = '"';
1200 while (*arg) {
1201 if (*arg == '"')
1202 *d++ = '\\';
1203 else if (*arg == '\\') {
1204 int count = 0;
1205 while (*arg == '\\') {
1206 count++;
1207 *d++ = *arg++;
1208 }
6d868416 1209 if (*arg == '"' || !*arg) {
7e5d7768
JS		 1210 while (count-- > 0)
1211 *d++ = '\\';
6d868416
JS		 1212 /* don't escape the surrounding end quote */
1213 if (!*arg)
1214 break;
7e5d7768
JS		 1215 *d++ = '\\';
1216 }
1217 }
1218 *d++ = *arg++;
1219 }
1220 *d++ = '"';
6d868416 1221 *d++ = '\0';
7e5d7768
JS		 1222 return q;
1223}
1224
9e9da23c
JS		 1225#include "quote.h"
1226
1227static const char *quote_arg_msys2(const char *arg)
1228{
1229 struct strbuf buf = STRBUF_INIT;
1230 const char *p2 = arg, *p;
1231
1232 for (p = arg; *p; p++) {
1233 int ws = isspace(*p);
7d8b6769
JS		 1234 if (!ws && *p != '\\' && *p != '"' && *p != '{' && *p != '\'' &&
1235 *p != '?' && *p != '*' && *p != '~')
9e9da23c
JS		 1236 continue;
1237 if (!buf.len)
1238 strbuf_addch(&buf, '"');
1239 if (p != p2)
1240 strbuf_add(&buf, p2, p - p2);
7d8b6769 1241 if (*p == '\\' || *p == '"')
9e9da23c
JS		 1242 strbuf_addch(&buf, '\\');
1243 p2 = p;
1244 }
1245
1246 if (p == arg)
1247 strbuf_addch(&buf, '"');
1248 else if (!buf.len)
1249 return arg;
1250 else
04522edb 1251 strbuf_add(&buf, p2, p - p2);
9e9da23c
JS		 1252
1253 strbuf_addch(&buf, '"');
1254 return strbuf_detach(&buf, 0);
1255}
1256
f1a4dfb8
JS		 1257static const char *parse_interpreter(const char *cmd)
1258{
1259 static char buf[100];
1260 char *p, *opt;
1261 int n, fd;
1262
1263 /* don't even try a .exe */
1264 n = strlen(cmd);
1265 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1266 return NULL;
1267
1268 fd = open(cmd, O_RDONLY);
1269 if (fd < 0)
1270 return NULL;
1271 n = read(fd, buf, sizeof(buf)-1);
1272 close(fd);
1273 if (n < 4) /* at least '#!/x' and not error */
1274 return NULL;
1275
1276 if (buf[0] != '#' || buf[1] != '!')
1277 return NULL;
1278 buf[n] = '\0';
bedc4279
PH		 1279 p = buf + strcspn(buf, "\r\n");
1280 if (!*p)
f1a4dfb8
JS		 1281 return NULL;
1282
1283 *p = '\0';
1284 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1285 return NULL;
1286 /* strip options */
1287 if ((opt = strchr(p+1, ' ')))
1288 *opt = '\0';
1289 return p+1;
1290}
1291
f1a4dfb8
JS		 1292/*
1293 * exe_only means that we only want to detect .exe files, but not scripts
1294 * (which do not have an extension)
1295 */
e0ca1ca2
RS		 1296static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1297 int isexe, int exe_only)
f1a4dfb8
JS		 1298{
1299 char path[MAX_PATH];
4e1a641e 1300 wchar_t wpath[MAX_PATH];
e0ca1ca2 1301 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
f1a4dfb8 1302
4e1a641e
AR		 1303 if (xutftowcs_path(wpath, path) < 0)
1304 return NULL;
1305
1306 if (!isexe && _waccess(wpath, F_OK) == 0)
f1a4dfb8 1307 return xstrdup(path);
4e1a641e
AR		 1308 wpath[wcslen(wpath)-4] = '\0';
1309 if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
1310 if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY)) {
1311 path[strlen(path)-4] = '\0';
fe77b695 1312 return xstrdup(path);
4e1a641e
AR		 1313 }
1314 }
f1a4dfb8
JS		 1315 return NULL;
1316}
1317
1318/*
22e5e58a 1319 * Determines the absolute path of cmd using the split path in path.
f1a4dfb8
JS		 1320 * If cmd contains a slash or backslash, no lookup is performed.
1321 */
e0ca1ca2 1322static char *path_lookup(const char *cmd, int exe_only)
f1a4dfb8 1323{
e0ca1ca2 1324 const char *path;
f1a4dfb8
JS		 1325 char *prog = NULL;
1326 int len = strlen(cmd);
1327 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1328
2ce6d075 1329 if (strpbrk(cmd, "/\\"))
e0ca1ca2
RS		 1330 return xstrdup(cmd);
1331
1332 path = mingw_getenv("PATH");
1333 if (!path)
1334 return NULL;
f1a4dfb8 1335
e0ca1ca2
RS		 1336 while (!prog) {
1337 const char *sep = strchrnul(path, ';');
1338 int dirlen = sep - path;
1339 if (dirlen)
1340 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1341 if (!*sep)
1342 break;
1343 path = sep + 1;
1344 }
f1a4dfb8
JS		 1345
1346 return prog;
1347}
1348
fe21c6b2
JS		 1349static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
1350{
1351 while (*s && *s != c)
1352 s++;
1353 return s;
1354}
1355
1356/* Compare only keys */
1357static int wenvcmp(const void *a, const void *b)
1358{
1359 wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
1360 size_t p_len, q_len;
1361
1362 /* Find the keys */
1363 p_len = wcschrnul(p, L'=') - p;
1364 q_len = wcschrnul(q, L'=') - q;
f279242d 1365
fe21c6b2
JS		 1366 /* If the length differs, include the shorter key's NUL */
1367 if (p_len < q_len)
1368 p_len++;
1369 else if (p_len > q_len)
1370 p_len = q_len + 1;
1371
1372 return _wcsnicmp(p, q, p_len);
1373}
f279242d 1374
df0e998c 1375/*
fe21c6b2
JS		 1376 * Build an environment block combining the inherited environment
1377 * merged with the given list of settings.
1378 *
1379 * Values of the form "KEY=VALUE" in deltaenv override inherited values.
1380 * Values of the form "KEY" in deltaenv delete inherited values.
1381 *
1382 * Multiple entries in deltaenv for the same key are explicitly allowed.
1383 *
1384 * We return a contiguous block of UNICODE strings with a final trailing
1385 * zero word.
df0e998c 1386 */
77734da2 1387static wchar_t *make_environment_block(char **deltaenv)
7e5d7768 1388{
fe21c6b2
JS		 1389 wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
1390 size_t wlen, s, delta_size, size;
df0e998c 1391
fe21c6b2
JS		 1392 wchar_t **array = NULL;
1393 size_t alloc = 0, nr = 0, i;
df0e998c 1394
fe21c6b2
JS		 1395 size = 1; /* for extra NUL at the end */
1396
1397 /* If there is no deltaenv to apply, simply return a copy. */
1398 if (!deltaenv || !*deltaenv) {
1399 for (p = wenv; p && *p; ) {
1400 size_t s = wcslen(p) + 1;
1401 size += s;
1402 p += s;
1403 }
77734da2 1404
6e578410 1405 DUP_ARRAY(result, wenv, size);
fe21c6b2
JS		 1406 FreeEnvironmentStringsW(wenv);
1407 return result;
1408 }
77734da2 1409
fe21c6b2
JS		 1410 /*
1411 * If there is a deltaenv, let's accumulate all keys into `array`,
97fff610
JS		 1412 * sort them using the stable git_stable_qsort() and then copy,
1413 * skipping duplicate keys
fe21c6b2
JS		 1414 */
1415 for (p = wenv; p && *p; ) {
1416 ALLOC_GROW(array, nr + 1, alloc);
1417 s = wcslen(p) + 1;
1418 array[nr++] = p;
1419 p += s;
1420 size += s;
df0e998c 1421 }
fe21c6b2
JS		 1422
1423 /* (over-)assess size needed for wchar version of deltaenv */
1424 for (delta_size = 0, i = 0; deltaenv[i]; i++)
1425 delta_size += strlen(deltaenv[i]) * 2 + 1;
1426 ALLOC_ARRAY(wdeltaenv, delta_size);
1427
1428 /* convert the deltaenv, appending to array */
1429 for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
1430 ALLOC_GROW(array, nr + 1, alloc);
1431 wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
1432 array[nr++] = p;
1433 p += wlen + 1;
1434 }
df0e998c 1435
97fff610 1436 git_stable_qsort(array, nr, sizeof(*array), wenvcmp);
fe21c6b2 1437 ALLOC_ARRAY(result, size + delta_size);
df0e998c 1438
fe21c6b2
JS		 1439 for (p = result, i = 0; i < nr; i++) {
1440 /* Skip any duplicate keys; last one wins */
1441 while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
1442 i++;
77734da2 1443
fe21c6b2
JS		 1444 /* Skip "to delete" entry */
1445 if (!wcschr(array[i], L'='))
1446 continue;
77734da2 1447
fe21c6b2 1448 size = wcslen(array[i]) + 1;
552fc501 1449 COPY_ARRAY(p, array[i], size);
fe21c6b2 1450 p += size;
df0e998c 1451 }
fe21c6b2
JS		 1452 *p = L'\0';
1453
1454 free(array);
1455 free(wdeltaenv);
1456 FreeEnvironmentStringsW(wenv);
1457 return result;
7e5d7768
JS		 1458}
1459
0e218f91
JS		 1460static void do_unset_environment_variables(void)
1461{
1462 static int done;
1463 char *p = unset_environment_variables;
1464
1465 if (done || !p)
1466 return;
1467 done = 1;
1468
1469 for (;;) {
1470 char *comma = strchr(p, ',');
1471
1472 if (comma)
1473 *comma = '\0';
1474 unsetenv(p);
1475 if (!comma)
1476 break;
1477 p = comma + 1;
1478 }
1479}
1480
52de4db5
EFL		 1481struct pinfo_t {
1482 struct pinfo_t *next;
1483 pid_t pid;
1484 HANDLE proc;
657b35f4
RJ		 1485};
1486static struct pinfo_t *pinfo = NULL;
52de4db5
EFL		 1487CRITICAL_SECTION pinfo_cs;
1488
9e9da23c
JS		 1489/* Used to match and chomp off path components */
1490static inline int match_last_path_component(const char *path, size_t *len,
1491 const char *component)
1492{
1493 size_t component_len = strlen(component);
1494 if (*len < component_len + 1 ||
1495 !is_dir_sep(path[*len - component_len - 1]) ||
1496 fspathncmp(path + *len - component_len, component, component_len))
1497 return 0;
1498 *len -= component_len + 1;
1499 /* chomp off repeated dir separators */
1500 while (*len > 0 && is_dir_sep(path[*len - 1]))
1501 (*len)--;
1502 return 1;
1503}
1504
1505static int is_msys2_sh(const char *cmd)
1506{
e2ba3d6f
JS		 1507 if (!cmd)
1508 return 0;
1509
1510 if (!strcmp(cmd, "sh")) {
9e9da23c
JS		 1511 static int ret = -1;
1512 char *p;
1513
1514 if (ret >= 0)
1515 return ret;
1516
1517 p = path_lookup(cmd, 0);
1518 if (!p)
1519 ret = 0;
1520 else {
1521 size_t len = strlen(p);
1522
1523 ret = match_last_path_component(p, &len, "sh.exe") &&
1524 match_last_path_component(p, &len, "bin") &&
1525 match_last_path_component(p, &len, "usr");
1526 free(p);
1527 }
1528 return ret;
1529 }
e2ba3d6f
JS		 1530
1531 if (ends_with(cmd, "\\sh.exe")) {
1532 static char *sh;
1533
1534 if (!sh)
1535 sh = path_lookup("sh", 0);
1536
1537 return !fspathcmp(cmd, sh);
1538 }
1539
9e9da23c
JS		 1540 return 0;
1541}
1542
77734da2 1543static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1544 const char *dir,
75301f90 1545 int prepend_cmd, int fhin, int fhout, int fherr)
7e5d7768 1546{
ac33519d 1547 static int restrict_handle_inheritance = -1;
9a780a38 1548 STARTUPINFOEXW si;
7e5d7768 1549 PROCESS_INFORMATION pi;
9a780a38
JS		 1550 LPPROC_THREAD_ATTRIBUTE_LIST attr_list = NULL;
1551 HANDLE stdhandles[3];
1552 DWORD stdhandles_count = 0;
1553 SIZE_T size;
7eb2619c
KB		 1554 struct strbuf args;
1555 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1556 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
7e5d7768 1557 BOOL ret;
0e218f91 1558 HANDLE cons;
9e9da23c 1559 const char *(*quote_arg)(const char *arg) =
49f7a76d
JS		 1560 is_msys2_sh(cmd ? cmd : *argv) ?
1561 quote_arg_msys2 : quote_arg_msvc;
3efc128c 1562 const char *strace_env;
0e218f91 1563
4d0375ca
JS		 1564 /* Make sure to override previous errors, if any */
1565 errno = 0;
1566
ac33519d
JS		 1567 if (restrict_handle_inheritance < 0)
1568 restrict_handle_inheritance = core_restrict_inherited_handles;
1569 /*
1570 * The following code to restrict which handles are inherited seems
1571 * to work properly only on Windows 7 and later, so let's disable it
1572 * on Windows Vista and 2008.
1573 */
1574 if (restrict_handle_inheritance < 0)
1575 restrict_handle_inheritance = GetVersion() >> 16 >= 7601;
1576
0e218f91 1577 do_unset_environment_variables();
7e5d7768
JS		 1578
1579 /* Determine whether or not we are associated to a console */
94238859 1580 cons = CreateFileW(L"CONOUT$", GENERIC_WRITE,
7e5d7768
JS		 1581 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1582 FILE_ATTRIBUTE_NORMAL, NULL);
1583 if (cons == INVALID_HANDLE_VALUE) {
1584 /* There is no console associated with this process.
1585 * Since the child is a console process, Windows
1586 * would normally create a console window. But
1587 * since we'll be redirecting std streams, we do
1588 * not need the console.
19fb896f
AG		 1589 * It is necessary to use DETACHED_PROCESS
1590 * instead of CREATE_NO_WINDOW to make ssh
1591 * recognize that it has no console.
7e5d7768 1592 */
7eb2619c 1593 flags |= DETACHED_PROCESS;
7e5d7768
JS		 1594 } else {
1595 /* There is already a console. If we specified
19fb896f 1596 * DETACHED_PROCESS here, too, Windows would
7e5d7768 1597 * disassociate the child from the console.
19fb896f 1598 * The same is true for CREATE_NO_WINDOW.
7e5d7768
JS		 1599 * Go figure!
1600 */
7e5d7768
JS		 1601 CloseHandle(cons);
1602 }
1603 memset(&si, 0, sizeof(si));
9a780a38
JS		 1604 si.StartupInfo.cb = sizeof(si);
1605 si.StartupInfo.hStdInput = winansi_get_osfhandle(fhin);
1606 si.StartupInfo.hStdOutput = winansi_get_osfhandle(fhout);
1607 si.StartupInfo.hStdError = winansi_get_osfhandle(fherr);
1608
1609 /* The list of handles cannot contain duplicates */
1610 if (si.StartupInfo.hStdInput != INVALID_HANDLE_VALUE)
1611 stdhandles[stdhandles_count++] = si.StartupInfo.hStdInput;
1612 if (si.StartupInfo.hStdOutput != INVALID_HANDLE_VALUE &&
1613 si.StartupInfo.hStdOutput != si.StartupInfo.hStdInput)
1614 stdhandles[stdhandles_count++] = si.StartupInfo.hStdOutput;
1615 if (si.StartupInfo.hStdError != INVALID_HANDLE_VALUE &&
1616 si.StartupInfo.hStdError != si.StartupInfo.hStdInput &&
1617 si.StartupInfo.hStdError != si.StartupInfo.hStdOutput)
1618 stdhandles[stdhandles_count++] = si.StartupInfo.hStdError;
1619 if (stdhandles_count)
1620 si.StartupInfo.dwFlags |= STARTF_USESTDHANDLES;
7e5d7768 1621
eb7c7863
JS		 1622 if (*argv && !strcmp(cmd, *argv))
1623 wcmd[0] = L'\0';
1624 else if (xutftowcs_path(wcmd, cmd) < 0)
99c3c76d
KB		 1625 return -1;
1626 if (dir && xutftowcs_path(wdir, dir) < 0)
1627 return -1;
1628
7e5d7768
JS		 1629 /* concatenate argv, quoting args as we go */
1630 strbuf_init(&args, 0);
1631 if (prepend_cmd) {
1632 char *quoted = (char *)quote_arg(cmd);
1633 strbuf_addstr(&args, quoted);
1634 if (quoted != cmd)
1635 free(quoted);
1636 }
1637 for (; *argv; argv++) {
1638 char *quoted = (char *)quote_arg(*argv);
1639 if (*args.buf)
1640 strbuf_addch(&args, ' ');
1641 strbuf_addstr(&args, quoted);
1642 if (quoted != *argv)
1643 free(quoted);
1644 }
1645
3efc128c
JS		 1646 strace_env = getenv("GIT_STRACE_COMMANDS");
1647 if (strace_env) {
1648 char *p = path_lookup("strace.exe", 1);
1649 if (!p)
1650 return error("strace not found!");
1651 if (xutftowcs_path(wcmd, p) < 0) {
1652 free(p);
1653 return -1;
1654 }
1655 free(p);
1656 if (!strcmp("1", strace_env) ||
1657 !strcasecmp("yes", strace_env) ||
1658 !strcasecmp("true", strace_env))
1659 strbuf_insert(&args, 0, "strace ", 7);
1660 else {
1661 const char *quoted = quote_arg(strace_env);
1662 struct strbuf buf = STRBUF_INIT;
1663 strbuf_addf(&buf, "strace -o %s ", quoted);
1664 if (quoted != strace_env)
1665 free((char *)quoted);
1666 strbuf_insert(&args, 0, buf.buf, buf.len);
1667 strbuf_release(&buf);
1668 }
1669 }
1670
8d5b3325 1671 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
99c3c76d
KB		 1672 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1673 strbuf_release(&args);
1674
77734da2 1675 wenvblk = make_environment_block(deltaenv);
7e5d7768
JS		 1676
1677 memset(&pi, 0, sizeof(pi));
9a780a38
JS		 1678 if (restrict_handle_inheritance && stdhandles_count &&
1679 (InitializeProcThreadAttributeList(NULL, 1, 0, &size) ||
1680 GetLastError() == ERROR_INSUFFICIENT_BUFFER) &&
1681 (attr_list = (LPPROC_THREAD_ATTRIBUTE_LIST)
1682 (HeapAlloc(GetProcessHeap(), 0, size))) &&
1683 InitializeProcThreadAttributeList(attr_list, 1, 0, &size) &&
1684 UpdateProcThreadAttribute(attr_list, 0,
1685 PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
1686 stdhandles,
1687 stdhandles_count * sizeof(HANDLE),
1688 NULL, NULL)) {
1689 si.lpAttributeList = attr_list;
1690 flags |= EXTENDED_STARTUPINFO_PRESENT;
1691 }
1692
1693 ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
1694 stdhandles_count ? TRUE : FALSE,
1695 flags, wenvblk, dir ? wdir : NULL,
1696 &si.StartupInfo, &pi);
1697
1698 /*
1699 * On Windows 2008 R2, it seems that specifying certain types of handles
1700 * (such as FILE_TYPE_CHAR or FILE_TYPE_PIPE) will always produce an
1701 * error. Rather than playing finicky and fragile games, let's just try
1702 * to detect this situation and simply try again without restricting any
1703 * handle inheritance. This is still better than failing to create
1704 * processes.
1705 */
1706 if (!ret && restrict_handle_inheritance && stdhandles_count) {
1707 DWORD err = GetLastError();
1708 struct strbuf buf = STRBUF_INIT;
1709
1710 if (err != ERROR_NO_SYSTEM_RESOURCES &&
1711 /*
1712 * On Windows 7 and earlier, handles on pipes and character
1713 * devices are inherited automatically, and cannot be
1714 * specified in the thread handle list. Rather than trying
1715 * to catch each and every corner case (and running the
1716 * chance of *still* forgetting a few), let's just fall
1717 * back to creating the process without trying to limit the
1718 * handle inheritance.
1719 */
1720 !(err == ERROR_INVALID_PARAMETER &&
1721 GetVersion() >> 16 < 9200) &&
1722 !getenv("SUPPRESS_HANDLE_INHERITANCE_WARNING")) {
1723 DWORD fl = 0;
1724 int i;
1725
1726 setenv("SUPPRESS_HANDLE_INHERITANCE_WARNING", "1", 1);
1727
1728 for (i = 0; i < stdhandles_count; i++) {
1729 HANDLE h = stdhandles[i];
1730 strbuf_addf(&buf, "handle #%d: %p (type %lx, "
1731 "handle info (%d) %lx\n", i, h,
1732 GetFileType(h),
1733 GetHandleInformation(h, &fl),
1734 fl);
1735 }
1736 strbuf_addstr(&buf, "\nThis is a bug; please report it "
1737 "at\nhttps://github.com/git-for-windows/"
1738 "git/issues/new\n\n"
1739 "To suppress this warning, please set "
1740 "the environment variable\n\n"
1741 "\tSUPPRESS_HANDLE_INHERITANCE_WARNING=1"
1742 "\n");
1743 }
1744 restrict_handle_inheritance = 0;
1745 flags &= ~EXTENDED_STARTUPINFO_PRESENT;
1746 ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
1747 TRUE, flags, wenvblk, dir ? wdir : NULL,
1748 &si.StartupInfo, &pi);
4d0375ca 1749 if (!ret)
9a780a38 1750 errno = err_win_to_posix(GetLastError());
4d0375ca 1751 if (ret && buf.len) {
9a780a38
JS		 1752 warning("failed to restrict file handles (%ld)\n\n%s",
1753 err, buf.buf);
1754 }
1755 strbuf_release(&buf);
1756 } else if (!ret)
1757 errno = err_win_to_posix(GetLastError());
1758
1759 if (si.lpAttributeList)
1760 DeleteProcThreadAttributeList(si.lpAttributeList);
1761 if (attr_list)
1762 HeapFree(GetProcessHeap(), 0, attr_list);
7e5d7768 1763
7eb2619c 1764 free(wenvblk);
99c3c76d 1765 free(wargs);
7e5d7768 1766
9a780a38 1767 if (!ret)
7e5d7768 1768 return -1;
9a780a38 1769
7e5d7768 1770 CloseHandle(pi.hThread);
52de4db5
EFL		 1771
1772 /*
1773 * The process ID is the human-readable identifier of the process
1774 * that we want to present in log and error messages. The handle
1775 * is not useful for this purpose. But we cannot close it, either,
1776 * because it is not possible to turn a process ID into a process
1777 * handle after the process terminated.
1778 * Keep the handle in a list for waitpid.
1779 */
1780 EnterCriticalSection(&pinfo_cs);
1781 {
1782 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1783 info->pid = pi.dwProcessId;
1784 info->proc = pi.hProcess;
1785 info->next = pinfo;
1786 pinfo = info;
1787 }
1788 LeaveCriticalSection(&pinfo_cs);
1789
1790 return (pid_t)pi.dwProcessId;
7e5d7768
JS		 1791}
1792
3e66e47b 1793static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
75301f90 1794{
77734da2 1795 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
75301f90
JS		 1796}
1797
77734da2 1798pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1799 const char *dir,
75301f90 1800 int fhin, int fhout, int fherr)
7e5d7768
JS		 1801{
1802 pid_t pid;
e0ca1ca2 1803 char *prog = path_lookup(cmd, 0);
7e5d7768
JS		 1804
1805 if (!prog) {
1806 errno = ENOENT;
1807 pid = -1;
1808 }
1809 else {
1810 const char *interpr = parse_interpreter(prog);
1811
1812 if (interpr) {
1813 const char *argv0 = argv[0];
e0ca1ca2 1814 char *iprog = path_lookup(interpr, 1);
7e5d7768
JS		 1815 argv[0] = prog;
1816 if (!iprog) {
1817 errno = ENOENT;
1818 pid = -1;
1819 }
1820 else {
77734da2 1821 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
75301f90 1822 fhin, fhout, fherr);
7e5d7768
JS		 1823 free(iprog);
1824 }
1825 argv[0] = argv0;
1826 }
1827 else
77734da2 1828 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
75301f90 1829 fhin, fhout, fherr);
7e5d7768
JS		 1830 free(prog);
1831 }
7e5d7768
JS		 1832 return pid;
1833}
1834
3e66e47b 1835static int try_shell_exec(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1836{
1837 const char *interpr = parse_interpreter(cmd);
f1a4dfb8
JS		 1838 char *prog;
1839 int pid = 0;
1840
1841 if (!interpr)
1842 return 0;
e0ca1ca2 1843 prog = path_lookup(interpr, 1);
f1a4dfb8 1844 if (prog) {
ee4512ed 1845 int exec_id;
f1a4dfb8 1846 int argc = 0;
12fb9bd8 1847 char **argv2;
f1a4dfb8 1848 while (argv[argc]) argc++;
b32fa95f 1849 ALLOC_ARRAY(argv2, argc + 1);
7e5d7768 1850 argv2[0] = (char *)cmd; /* full path to the script file */
51bd6be3 1851 COPY_ARRAY(&argv2[1], &argv[1], argc);
09884f35
RS		 1852 exec_id = trace2_exec(prog, (const char **)argv2);
1853 pid = mingw_spawnv(prog, (const char **)argv2, 1);
f1a4dfb8
JS		 1854 if (pid >= 0) {
1855 int status;
1856 if (waitpid(pid, &status, 0) < 0)
1857 status = 255;
ee4512ed 1858 trace2_exec_result(exec_id, status);
f1a4dfb8
JS		 1859 exit(status);
1860 }
ee4512ed 1861 trace2_exec_result(exec_id, -1);
f1a4dfb8
JS		 1862 pid = 1; /* indicate that we tried but failed */
1863 free(prog);
1864 free(argv2);
1865 }
f1a4dfb8
JS		 1866 return pid;
1867}
1868
3e66e47b 1869int mingw_execv(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1870{
1871 /* check if git_command is a shell script */
3e66e47b 1872 if (!try_shell_exec(cmd, argv)) {
f1a4dfb8 1873 int pid, status;
ee4512ed 1874 int exec_id;
f1a4dfb8 1875
ee4512ed 1876 exec_id = trace2_exec(cmd, (const char **)argv);
3e66e47b 1877 pid = mingw_spawnv(cmd, (const char **)argv, 0);
ee4512ed
JH		 1878 if (pid < 0) {
1879 trace2_exec_result(exec_id, -1);
570f1e6e 1880 return -1;
ee4512ed 1881 }
f1a4dfb8
JS		 1882 if (waitpid(pid, &status, 0) < 0)
1883 status = 255;
ee4512ed 1884 trace2_exec_result(exec_id, status);
f1a4dfb8
JS		 1885 exit(status);
1886 }
570f1e6e 1887 return -1;
f1a4dfb8
JS		 1888}
1889
1696d723 1890int mingw_execvp(const char *cmd, char *const *argv)
f1a4dfb8 1891{
e0ca1ca2 1892 char *prog = path_lookup(cmd, 0);
f1a4dfb8
JS		 1893
1894 if (prog) {
3e66e47b 1895 mingw_execv(prog, argv);
f1a4dfb8
JS		 1896 free(prog);
1897 } else
1898 errno = ENOENT;
1899
1696d723 1900 return -1;
f1a4dfb8
JS		 1901}
1902
82fc07b7
EFL		 1903int mingw_kill(pid_t pid, int sig)
1904{
1905 if (pid > 0 && sig == SIGTERM) {
1906 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1907
1908 if (TerminateProcess(h, -1)) {
1909 CloseHandle(h);
1910 return 0;
1911 }
1912
1913 errno = err_win_to_posix(GetLastError());
1914 CloseHandle(h);
1915 return -1;
64a99eb4
NTND		 1916 } else if (pid > 0 && sig == 0) {
1917 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1918 if (h) {
1919 CloseHandle(h);
1920 return 0;
1921 }
82fc07b7
EFL		 1922 }
1923
1924 errno = EINVAL;
1925 return -1;
1926}
1927
343ff06d 1928/*
fe21c6b2
JS		 1929 * UTF-8 versions of getenv(), putenv() and unsetenv().
1930 * Internally, they use the CRT's stock UNICODE routines
1931 * to avoid data loss.
343ff06d 1932 */
fe21c6b2 1933char *mingw_getenv(const char *name)
343ff06d 1934{
ca1b4116 1935#define GETENV_MAX_RETAIN 64
fe21c6b2
JS		 1936 static char *values[GETENV_MAX_RETAIN];
1937 static int value_counter;
1938 int len_key, len_value;
1939 wchar_t *w_key;
1940 char *value;
1941 wchar_t w_value[32768];
343ff06d 1942
fe21c6b2
JS		 1943 if (!name || !*name)
1944 return NULL;
ba26f296 1945
fe21c6b2
JS		 1946 len_key = strlen(name) + 1;
1947 /* We cannot use xcalloc() here because that uses getenv() itself */
1948 w_key = calloc(len_key, sizeof(wchar_t));
1949 if (!w_key)
1950 die("Out of memory, (tried to allocate %u wchar_t's)", len_key);
1951 xutftowcs(w_key, name, len_key);
61d1d92a
JS		 1952 /* GetEnvironmentVariableW() only sets the last error upon failure */
1953 SetLastError(ERROR_SUCCESS);
fe21c6b2
JS		 1954 len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
1955 if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
1956 free(w_key);
1957 return NULL;
ba26f296 1958 }
fe21c6b2
JS		 1959 free(w_key);
1960
1961 len_value = len_value * 3 + 1;
1962 /* We cannot use xcalloc() here because that uses getenv() itself */
1963 value = calloc(len_value, sizeof(char));
1964 if (!value)
1965 die("Out of memory, (tried to allocate %u bytes)", len_value);
1966 xwcstoutf(value, w_value, len_value);
1967
1968 /*
1969 * We return `value` which is an allocated value and the caller is NOT
1970 * expecting to have to free it, so we keep a round-robin array,
1971 * invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
1972 */
1973 free(values[value_counter]);
1974 values[value_counter++] = value;
1975 if (value_counter >= ARRAY_SIZE(values))
1976 value_counter = 0;
1977
1978 return value;
ba26f296
JS		 1979}
1980
fe21c6b2 1981int mingw_putenv(const char *namevalue)
ba26f296 1982{
fe21c6b2
JS		 1983 int size;
1984 wchar_t *wide, *equal;
1985 BOOL result;
ba26f296 1986
fe21c6b2
JS		 1987 if (!namevalue || !*namevalue)
1988 return 0;
ba26f296 1989
fe21c6b2
JS		 1990 size = strlen(namevalue) * 2 + 1;
1991 wide = calloc(size, sizeof(wchar_t));
1992 if (!wide)
1993 die("Out of memory, (tried to allocate %u wchar_t's)", size);
1994 xutftowcs(wide, namevalue, size);
1995 equal = wcschr(wide, L'=');
1996 if (!equal)
1997 result = SetEnvironmentVariableW(wide, NULL);
1998 else {
1999 *equal = L'\0';
2000 result = SetEnvironmentVariableW(wide, equal + 1);
ba26f296 2001 }
fe21c6b2 2002 free(wide);
2affea41 2003
fe21c6b2
JS		 2004 if (!result)
2005 errno = err_win_to_posix(GetLastError());
df599e96 2006
fe21c6b2 2007 return result ? 0 : -1;
06bc4b79
JS		 2008}
2009
b7cc9f82 2010static void ensure_socket_initialization(void)
746fb857
JS		 2011{
2012 WSADATA wsa;
b7cc9f82
MS		 2013 static int initialized = 0;
2014
2015 if (initialized)
2016 return;
746fb857
JS		 2017
2018 if (WSAStartup(MAKEWORD(2,2), &wsa))
2019 die("unable to initialize winsock subsystem, error %d",
2020 WSAGetLastError());
fe3b2b7b 2021
b9f0193b 2022 atexit((void(*)(void)) WSACleanup);
b7cc9f82
MS		 2023 initialized = 1;
2024}
2025
13d24b01
PT		 2026#undef gethostname
2027int mingw_gethostname(char *name, int namelen)
2028{
2029 ensure_socket_initialization();
2030 return gethostname(name, namelen);
2031}
2032
b7cc9f82
MS		 2033#undef gethostbyname
2034struct hostent *mingw_gethostbyname(const char *host)
2035{
2036 ensure_socket_initialization();
746fb857
JS		 2037 return gethostbyname(host);
2038}
2039
b9f0193b 2040#undef getaddrinfo
fe3b2b7b
MS		 2041int mingw_getaddrinfo(const char *node, const char *service,
2042 const struct addrinfo *hints, struct addrinfo **res)
2043{
2044 ensure_socket_initialization();
b9f0193b 2045 return getaddrinfo(node, service, hints, res);
fe3b2b7b
MS		 2046}
2047
746fb857
JS		 2048int mingw_socket(int domain, int type, int protocol)
2049{
2050 int sockfd;
772991af
MP		 2051 SOCKET s;
2052
2053 ensure_socket_initialization();
2054 s = WSASocket(domain, type, protocol, NULL, 0, 0);
746fb857
JS		 2055 if (s == INVALID_SOCKET) {
2056 /*
2057 * WSAGetLastError() values are regular BSD error codes
2058 * biased by WSABASEERR.
2059 * However, strerror() does not know about networking
2060 * specific errors, which are values beginning at 38 or so.
2061 * Therefore, we choose to leave the biased error code
2062 * in errno so that _if_ someone looks up the code somewhere,
2063 * then it is at least the number that are usually listed.
2064 */
2065 errno = WSAGetLastError();
2066 return -1;
2067 }
2068 /* convert into a file descriptor */
2069 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
2070 closesocket(s);
2071 return error("unable to make a socket file descriptor: %s",
2072 strerror(errno));
2073 }
2074 return sockfd;
2075}
2076
2077#undef connect
2078int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
2079{
2080 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2081 return connect(s, sa, sz);
2082}
2083
772991af
MP		 2084#undef bind
2085int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
2086{
2087 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2088 return bind(s, sa, sz);
2089}
2090
2091#undef setsockopt
2092int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
2093{
2094 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2095 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
2096}
2097
a7941795
JS		 2098#undef shutdown
2099int mingw_shutdown(int sockfd, int how)
2100{
2101 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2102 return shutdown(s, how);
2103}
2104
772991af
MP		 2105#undef listen
2106int mingw_listen(int sockfd, int backlog)
2107{
2108 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2109 return listen(s, backlog);
2110}
2111
2112#undef accept
2113int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
2114{
2115 int sockfd2;
2116
2117 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
2118 SOCKET s2 = accept(s1, sa, sz);
2119
2120 /* convert into a file descriptor */
2121 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
2122 int err = errno;
2123 closesocket(s2);
2124 return error("unable to make a socket file descriptor: %s",
2125 strerror(err));
2126 }
2127 return sockfd2;
2128}
2129
ea9e98c3
JS		 2130#undef rename
2131int mingw_rename(const char *pold, const char *pnew)
2132{
6ac6f878
JS		 2133 DWORD attrs, gle;
2134 int tries = 0;
85faec9d
KB		 2135 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
2136 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
2137 return -1;
632f7017 2138
ea9e98c3
JS		 2139 /*
2140 * Try native rename() first to get errno right.
2141 * It is based on MoveFile(), which cannot overwrite existing files.
2142 */
85faec9d 2143 if (!_wrename(wpold, wpnew))
ea9e98c3
JS		 2144 return 0;
2145 if (errno != EEXIST)
2146 return -1;
6ac6f878 2147repeat:
85faec9d 2148 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
ea9e98c3
JS		 2149 return 0;
2150 /* TODO: translate more errors */
6ac6f878
JS		 2151 gle = GetLastError();
2152 if (gle == ERROR_ACCESS_DENIED &&
85faec9d 2153 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
632f7017 2154 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
4426fb51 2155 DWORD attrsold = GetFileAttributesW(wpold);
2156 if (attrsold == INVALID_FILE_ATTRIBUTES ||
2157 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
2158 errno = EISDIR;
2159 else if (!_wrmdir(wpnew))
2160 goto repeat;
ea9e98c3
JS		 2161 return -1;
2162 }
632f7017 2163 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
85faec9d
KB		 2164 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
2165 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
632f7017 2166 return 0;
6ac6f878 2167 gle = GetLastError();
632f7017 2168 /* revert file attributes on failure */
85faec9d 2169 SetFileAttributesW(wpnew, attrs);
632f7017 2170 }
ea9e98c3 2171 }
6ac6f878
JS		 2172 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
2173 /*
2174 * We assume that some other process had the source or
2175 * destination file open at the wrong moment and retry.
2176 * In order to give the other process a higher chance to
2177 * complete its operation, we give up our time slice now.
2178 * If we have to retry again, we do sleep a bit.
2179 */
2180 Sleep(delay[tries]);
2181 tries++;
2182 goto repeat;
2183 }
c9b78400
HV		 2184 if (gle == ERROR_ACCESS_DENIED &&
2185 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
2186 "Should I try again?", pold, pnew))
2187 goto repeat;
2188
ea9e98c3
JS		 2189 errno = EACCES;
2190 return -1;
2191}
2192
b1b95204
RJ		 2193/*
2194 * Note that this doesn't return the actual pagesize, but
2195 * the allocation granularity. If future Windows specific git code
2196 * needs the real getpagesize function, we need to find another solution.
2197 */
2198int mingw_getpagesize(void)
2199{
2200 SYSTEM_INFO si;
2201 GetSystemInfo(&si);
2202 return si.dwAllocationGranularity;
2203}
2204
564be791
JS		 2205/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
2206enum EXTENDED_NAME_FORMAT {
2207 NameDisplay = 3,
2208 NameUserPrincipal = 8
2209};
2210
2211static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
2212{
4a9b2049 2213 DECLARE_PROC_ADDR(secur32.dll, BOOL, SEC_ENTRY, GetUserNameExW,
564be791
JS		 2214 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
2215 static wchar_t wbuffer[1024];
2216 DWORD len;
2217
2218 if (!INIT_PROC_ADDR(GetUserNameExW))
2219 return NULL;
2220
2221 len = ARRAY_SIZE(wbuffer);
2222 if (GetUserNameExW(type, wbuffer, &len)) {
2223 char *converted = xmalloc((len *= 3));
2224 if (xwcstoutf(converted, wbuffer, len) >= 0)
2225 return converted;
2226 free(converted);
2227 }
2228
2229 return NULL;
2230}
2231
501afcb8
JS		 2232char *mingw_query_user_email(void)
2233{
2234 return get_extended_user_info(NameUserPrincipal);
2235}
2236
f4626df5
JS		 2237struct passwd *getpwuid(int uid)
2238{
55b6513e 2239 static unsigned initialized;
f7597aca 2240 static char user_name[100];
55b6513e 2241 static struct passwd *p;
39a98e9b 2242 wchar_t buf[100];
55b6513e 2243 DWORD len;
f7597aca 2244
55b6513e
JS		 2245 if (initialized)
2246 return p;
f7597aca 2247
697bdd22 2248 len = ARRAY_SIZE(buf);
39a98e9b
JS		 2249 if (!GetUserNameW(buf, &len)) {
2250 initialized = 1;
2251 return NULL;
2252 }
2253
2254 if (xwcstoutf(user_name, buf, sizeof(user_name)) < 0) {
55b6513e 2255 initialized = 1;
f7597aca 2256 return NULL;
55b6513e
JS		 2257 }
2258
2259 p = xmalloc(sizeof(*p));
2260 p->pw_name = user_name;
564be791
JS		 2261 p->pw_gecos = get_extended_user_info(NameDisplay);
2262 if (!p->pw_gecos)
2263 p->pw_gecos = "unknown";
55b6513e
JS		 2264 p->pw_dir = NULL;
2265
2266 initialized = 1;
2267 return p;
f4626df5
JS		 2268}
2269
6072fc31
JS		 2270static HANDLE timer_event;
2271static HANDLE timer_thread;
2272static int timer_interval;
2273static int one_shot;
176478a8 2274static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
6072fc31
JS		 2275
2276/* The timer works like this:
2277 * The thread, ticktack(), is a trivial routine that most of the time
2278 * only waits to receive the signal to terminate. The main thread tells
2279 * the thread to terminate by setting the timer_event to the signalled
2280 * state.
2281 * But ticktack() interrupts the wait state after the timer's interval
2282 * length to call the signal handler.
2283 */
2284
d7fa500f 2285static unsigned __stdcall ticktack(void *dummy)
6072fc31
JS		 2286{
2287 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
176478a8 2288 mingw_raise(SIGALRM);
6072fc31
JS		 2289 if (one_shot)
2290 break;
2291 }
2292 return 0;
2293}
2294
2295static int start_timer_thread(void)
2296{
2297 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
2298 if (timer_event) {
2299 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
2300 if (!timer_thread )
2301 return errno = ENOMEM,
2302 error("cannot start timer thread");
2303 } else
2304 return errno = ENOMEM,
2305 error("cannot allocate resources for timer");
2306 return 0;
2307}
2308
2309static void stop_timer_thread(void)
2310{
2311 if (timer_event)
2312 SetEvent(timer_event); /* tell thread to terminate */
2313 if (timer_thread) {
72d63b2f 2314 int rc = WaitForSingleObject(timer_thread, 10000);
6072fc31
JS		 2315 if (rc == WAIT_TIMEOUT)
2316 error("timer thread did not terminate timely");
2317 else if (rc != WAIT_OBJECT_0)
2318 error("waiting for timer thread failed: %lu",
2319 GetLastError());
2320 CloseHandle(timer_thread);
2321 }
2322 if (timer_event)
2323 CloseHandle(timer_event);
2324 timer_event = NULL;
2325 timer_thread = NULL;
2326}
2327
2328static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
2329{
2330 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
2331}
2332
f4626df5
JS		 2333int setitimer(int type, struct itimerval *in, struct itimerval *out)
2334{
6072fc31
JS		 2335 static const struct timeval zero;
2336 static int atexit_done;
2337
afe8a907 2338 if (out)
6072fc31
JS		 2339 return errno = EINVAL,
2340 error("setitimer param 3 != NULL not implemented");
2341 if (!is_timeval_eq(&in->it_interval, &zero) &&
2342 !is_timeval_eq(&in->it_interval, &in->it_value))
2343 return errno = EINVAL,
2344 error("setitimer: it_interval must be zero or eq it_value");
2345
2346 if (timer_thread)
2347 stop_timer_thread();
2348
2349 if (is_timeval_eq(&in->it_value, &zero) &&
2350 is_timeval_eq(&in->it_interval, &zero))
2351 return 0;
2352
2353 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
2354 one_shot = is_timeval_eq(&in->it_interval, &zero);
2355 if (!atexit_done) {
2356 atexit(stop_timer_thread);
2357 atexit_done = 1;
2358 }
2359 return start_timer_thread();
f4626df5
JS		 2360}
2361
2362int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2363{
6072fc31
JS		 2364 if (sig != SIGALRM)
2365 return errno = EINVAL,
2366 error("sigaction only implemented for SIGALRM");
afe8a907 2367 if (out)
6072fc31
JS		 2368 return errno = EINVAL,
2369 error("sigaction: param 3 != NULL not implemented");
2370
2371 timer_fn = in->sa_handler;
2372 return 0;
2373}
2374
2375#undef signal
2376sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2377{
a4540658 2378 sig_handler_t old;
176478a8
EFL		 2379
2380 switch (sig) {
2381 case SIGALRM:
a4540658 2382 old = timer_fn;
176478a8
EFL		 2383 timer_fn = handler;
2384 break;
2385
2386 case SIGINT:
a4540658 2387 old = sigint_fn;
176478a8
EFL		 2388 sigint_fn = handler;
2389 break;
2390
2391 default:
6072fc31 2392 return signal(sig, handler);
176478a8
EFL		 2393 }
2394
6072fc31 2395 return old;
f4626df5 2396}
4804aabc 2397
176478a8
EFL		 2398#undef raise
2399int mingw_raise(int sig)
2400{
2401 switch (sig) {
2402 case SIGALRM:
2403 if (timer_fn == SIG_DFL) {
2404 if (isatty(STDERR_FILENO))
2405 fputs("Alarm clock\n", stderr);
2406 exit(128 + SIGALRM);
2407 } else if (timer_fn != SIG_IGN)
2408 timer_fn(SIGALRM);
2409 return 0;
2410
2411 case SIGINT:
2412 if (sigint_fn == SIG_DFL)
2413 exit(128 + SIGINT);
2414 else if (sigint_fn != SIG_IGN)
2415 sigint_fn(SIGINT);
2416 return 0;
2417
446df603
JH		 2418#if defined(_MSC_VER)
2419 case SIGILL:
2420 case SIGFPE:
2421 case SIGSEGV:
2422 case SIGTERM:
2423 case SIGBREAK:
2424 case SIGABRT:
2425 case SIGABRT_COMPAT:
2426 /*
2427 * The <signal.h> header in the MS C Runtime defines 8 signals
2428 * as being supported on the platform. Anything else causes an
2429 * "Invalid signal or error" (which in DEBUG builds causes the
2430 * Abort/Retry/Ignore dialog). We by-pass the CRT for things we
2431 * already know will fail.
2432 */
2433 return raise(sig);
2434 default:
2435 errno = EINVAL;
2436 return -1;
2437
2438#else
2439
176478a8
EFL		 2440 default:
2441 return raise(sig);
446df603
JH		 2442
2443#endif
2444
176478a8
EFL		 2445 }
2446}
2447
7be401e0
PK		 2448int link(const char *oldpath, const char *newpath)
2449{
85faec9d
KB		 2450 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2451 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2452 xutftowcs_path(wnewpath, newpath) < 0)
2453 return -1;
2454
1e1a876b 2455 if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
7be401e0
PK		 2456 errno = err_win_to_posix(GetLastError());
2457 return -1;
2458 }
2459 return 0;
2460}
0dbbbc1e 2461
956d86d1 2462pid_t waitpid(pid_t pid, int *status, int options)
52de4db5
EFL		 2463{
2464 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2465 FALSE, pid);
2466 if (!h) {
2467 errno = ECHILD;
2468 return -1;
2469 }
2470
ef7108ca
EFL		 2471 if (pid > 0 && options & WNOHANG) {
2472 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2473 CloseHandle(h);
2474 return 0;
2475 }
2476 options &= ~WNOHANG;
2477 }
2478
52de4db5
EFL		 2479 if (options == 0) {
2480 struct pinfo_t **ppinfo;
2481 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2482 CloseHandle(h);
2483 return 0;
2484 }
2485
2486 if (status)
2487 GetExitCodeProcess(h, (LPDWORD)status);
2488
2489 EnterCriticalSection(&pinfo_cs);
2490
2491 ppinfo = &pinfo;
2492 while (*ppinfo) {
2493 struct pinfo_t *info = *ppinfo;
2494 if (info->pid == pid) {
2495 CloseHandle(info->proc);
2496 *ppinfo = info->next;
2497 free(info);
2498 break;
2499 }
2500 ppinfo = &info->next;
2501 }
2502
2503 LeaveCriticalSection(&pinfo_cs);
2504
2505 CloseHandle(h);
2506 return pid;
2507 }
2508 CloseHandle(h);
2509
2510 errno = EINVAL;
2511 return -1;
2512}
c2369bdf 2513
1c950a59
KB		 2514int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2515{
2516 int upos = 0, wpos = 0;
2517 const unsigned char *utf = (const unsigned char*) utfs;
2518 if (!utf || !wcs || wcslen < 1) {
2519 errno = EINVAL;
2520 return -1;
2521 }
2522 /* reserve space for \0 */
2523 wcslen--;
2524 if (utflen < 0)
2525 utflen = INT_MAX;
2526
2527 while (upos < utflen) {
2528 int c = utf[upos++] & 0xff;
2529 if (utflen == INT_MAX && c == 0)
2530 break;
2531
2532 if (wpos >= wcslen) {
2533 wcs[wpos] = 0;
2534 errno = ERANGE;
2535 return -1;
2536 }
2537
2538 if (c < 0x80) {
2539 /* ASCII */
2540 wcs[wpos++] = c;
2541 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2542 (utf[upos] & 0xc0) == 0x80) {
2543 /* 2-byte utf-8 */
2544 c = ((c & 0x1f) << 6);
2545 c |= (utf[upos++] & 0x3f);
2546 wcs[wpos++] = c;
2547 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2548 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2549 (utf[upos] & 0xc0) == 0x80 &&
2550 (utf[upos + 1] & 0xc0) == 0x80) {
2551 /* 3-byte utf-8 */
2552 c = ((c & 0x0f) << 12);
2553 c |= ((utf[upos++] & 0x3f) << 6);
2554 c |= (utf[upos++] & 0x3f);
2555 wcs[wpos++] = c;
2556 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2557 wpos + 1 < wcslen &&
2558 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2559 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2560 (utf[upos] & 0xc0) == 0x80 &&
2561 (utf[upos + 1] & 0xc0) == 0x80 &&
2562 (utf[upos + 2] & 0xc0) == 0x80) {
2563 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2564 c = ((c & 0x07) << 18);
2565 c |= ((utf[upos++] & 0x3f) << 12);
2566 c |= ((utf[upos++] & 0x3f) << 6);
2567 c |= (utf[upos++] & 0x3f);
2568 c -= 0x10000;
2569 wcs[wpos++] = 0xd800 | (c >> 10);
2570 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2571 } else if (c >= 0xa0) {
2572 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2573 wcs[wpos++] = c;
2574 } else {
2575 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2576 static const char *hex = "0123456789abcdef";
2577 wcs[wpos++] = hex[c >> 4];
2578 if (wpos < wcslen)
2579 wcs[wpos++] = hex[c & 0x0f];
2580 }
2581 }
2582 wcs[wpos] = 0;
2583 return wpos;
2584}
2585
2586int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2587{
2588 if (!wcs || !utf || utflen < 1) {
2589 errno = EINVAL;
2590 return -1;
2591 }
2592 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2593 if (utflen)
2594 return utflen - 1;
2595 errno = ERANGE;
2596 return -1;
2597}
2598
0767172b 2599static void setup_windows_environment(void)
02e6edc0 2600{
1fc7bf79
JS		 2601 char *tmp = getenv("TMPDIR");
2602
02e6edc0 2603 /* on Windows it is TMP and TEMP */
1fc7bf79
JS		 2604 if (!tmp) {
2605 if (!(tmp = getenv("TMP")))
02e6edc0 2606 tmp = getenv("TEMP");
1fc7bf79 2607 if (tmp) {
02e6edc0 2608 setenv("TMPDIR", tmp, 1);
1fc7bf79
JS		 2609 tmp = getenv("TMPDIR");
2610 }
2611 }
2612
2613 if (tmp) {
2614 /*
2615 * Convert all dir separators to forward slashes,
2616 * to help shell commands called from the Git
2617 * executable (by not mistaking the dir separators
2618 * for escape characters).
2619 */
8e9b2080 2620 convert_slashes(tmp);
02e6edc0
KB		 2621 }
2622
2623 /* simulate TERM to enable auto-color (see color.c) */
2624 if (!getenv("TERM"))
2625 setenv("TERM", "cygwin", 1);
e12a9556
KB		 2626
2627 /* calculate HOME if not set */
2628 if (!getenv("HOME")) {
2629 /*
2630 * try $HOMEDRIVE$HOMEPATH - the home share may be a network
2631 * location, thus also check if the path exists (i.e. is not
2632 * disconnected)
2633 */
2634 if ((tmp = getenv("HOMEDRIVE"))) {
2635 struct strbuf buf = STRBUF_INIT;
2636 strbuf_addstr(&buf, tmp);
2637 if ((tmp = getenv("HOMEPATH"))) {
2638 strbuf_addstr(&buf, tmp);
2639 if (is_directory(buf.buf))
2640 setenv("HOME", buf.buf, 1);
2641 else
2642 tmp = NULL; /* use $USERPROFILE */
2643 }
2644 strbuf_release(&buf);
2645 }
2646 /* use $USERPROFILE if the home share is not available */
2647 if (!tmp && (tmp = getenv("USERPROFILE")))
2648 setenv("HOME", tmp, 1);
2649 }
02e6edc0
KB		 2650}
2651
bdc77d1d
JS		 2652static PSID get_current_user_sid(void)
2653{
2654 HANDLE token;
2655 DWORD len = 0;
2656 PSID result = NULL;
2657
2658 if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token))
2659 return NULL;
2660
2661 if (!GetTokenInformation(token, TokenUser, NULL, 0, &len)) {
2662 TOKEN_USER *info = xmalloc((size_t)len);
2663 if (GetTokenInformation(token, TokenUser, info, len, &len)) {
2664 len = GetLengthSid(info->User.Sid);
2665 result = xmalloc(len);
2666 if (!CopySid(len, result, info->User.Sid)) {
2667 error(_("failed to copy SID (%ld)"),
2668 GetLastError());
2669 FREE_AND_NULL(result);
2670 }
2671 }
2672 FREE_AND_NULL(info);
2673 }
2674 CloseHandle(token);
2675
2676 return result;
2677}
2678
7c83470e
JS		 2679static int acls_supported(const char *path)
2680{
2681 size_t offset = offset_1st_component(path);
2682 WCHAR wroot[MAX_PATH];
2683 DWORD file_system_flags;
2684
2685 if (offset &&
2686 xutftowcsn(wroot, path, MAX_PATH, offset) > 0 &&
2687 GetVolumeInformationW(wroot, NULL, 0, NULL, NULL,
2688 &file_system_flags, NULL, 0))
2689 return !!(file_system_flags & FILE_PERSISTENT_ACLS);
2690
2691 return 0;
2692}
2693
17d3883f 2694int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
bdc77d1d
JS		 2695{
2696 WCHAR wpath[MAX_PATH];
2697 PSID sid = NULL;
2698 PSECURITY_DESCRIPTOR descriptor = NULL;
2699 DWORD err;
2700
2701 static wchar_t home[MAX_PATH];
2702
2703 int result = 0;
2704
2705 if (xutftowcs_path(wpath, path) < 0)
2706 return 0;
2707
2708 /*
2709 * On Windows, the home directory is owned by the administrator, but for
2710 * all practical purposes, it belongs to the user. Do pretend that it is
2711 * owned by the user.
2712 */
2713 if (!*home) {
2714 DWORD size = ARRAY_SIZE(home);
2715 DWORD len = GetEnvironmentVariableW(L"HOME", home, size);
2716 if (!len || len > size)
2717 wcscpy(home, L"::N/A::");
2718 }
2719 if (!wcsicmp(wpath, home))
2720 return 1;
2721
2722 /* Get the owner SID */
2723 err = GetNamedSecurityInfoW(wpath, SE_FILE_OBJECT,
2724 OWNER_SECURITY_INFORMATION |
2725 DACL_SECURITY_INFORMATION,
2726 &sid, NULL, NULL, NULL, &descriptor);
2727
2728 if (err != ERROR_SUCCESS)
2729 error(_("failed to get owner for '%s' (%ld)"), path, err);
2730 else if (sid && IsValidSid(sid)) {
2731 /* Now, verify that the SID matches the current user's */
2732 static PSID current_user_sid;
3f7207e2 2733 BOOL is_member;
bdc77d1d
JS		 2734
2735 if (!current_user_sid)
2736 current_user_sid = get_current_user_sid();
2737
2738 if (current_user_sid &&
2739 IsValidSid(current_user_sid) &&
2740 EqualSid(sid, current_user_sid))
2741 result = 1;
3f7207e2
JS		 2742 else if (IsWellKnownSid(sid, WinBuiltinAdministratorsSid) &&
2743 CheckTokenMembership(NULL, sid, &is_member) &&
2744 is_member)
2745 /*
2746 * If owned by the Administrators group, and the
2747 * current user is an administrator, we consider that
2748 * okay, too.
2749 */
2750 result = 1;
7c83470e
JS		 2751 else if (report &&
2752 IsWellKnownSid(sid, WinWorldSid) &&
2753 !acls_supported(path)) {
2754 /*
2755 * On FAT32 volumes, ownership is not actually recorded.
2756 */
4eb1ccec 2757 strbuf_addf(report, "'%s' is on a file system that does "
7c83470e
JS		 2758 "not record ownership\n", path);
2759 } else if (report) {
e883e04b
JS		 2760 LPSTR str1, str2, to_free1 = NULL, to_free2 = NULL;
2761
2762 if (ConvertSidToStringSidA(sid, &str1))
2763 to_free1 = str1;
2764 else
2765 str1 = "(inconvertible)";
2766
2767 if (!current_user_sid)
2768 str2 = "(none)";
2769 else if (!IsValidSid(current_user_sid))
2770 str2 = "(invalid)";
2771 else if (ConvertSidToStringSidA(current_user_sid, &str2))
2772 to_free2 = str2;
2773 else
2774 str2 = "(inconvertible)";
2775 strbuf_addf(report,
2776 "'%s' is owned by:\n"
2777 "\t'%s'\nbut the current user is:\n"
2778 "\t'%s'\n", path, str1, str2);
2779 LocalFree(to_free1);
2780 LocalFree(to_free2);
2781 }
bdc77d1d
JS		 2782 }
2783
2784 /*
2785 * We can release the security descriptor struct only now because `sid`
2786 * actually points into this struct.
2787 */
2788 if (descriptor)
2789 LocalFree(descriptor);
2790
2791 return result;
2792}
2793
4dc42c6c 2794int is_valid_win32_path(const char *path, int allow_literal_nul)
d2c84dad 2795{
4dc42c6c 2796 const char *p = path;
d2c84dad
JS		 2797 int preceding_space_or_period = 0, i = 0, periods = 0;
2798
2799 if (!protect_ntfs)
2800 return 1;
2801
817ddd64 2802 skip_dos_drive_prefix((char **)&path);
4dc42c6c 2803 goto segment_start;
817ddd64 2804
d2c84dad
JS		 2805 for (;;) {
2806 char c = *(path++);
2807 switch (c) {
2808 case '\0':
2809 case '/': case '\\':
2810 /* cannot end in ` ` or `.`, except for `.` and `..` */
2811 if (preceding_space_or_period &&
2812 (i != periods || periods > 2))
2813 return 0;
2814 if (!c)
2815 return 1;
2816
2817 i = periods = preceding_space_or_period = 0;
4dc42c6c
JS		 2818
2819segment_start:
2820 switch (*path) {
2821 case 'a': case 'A': /* AUX */
2822 if (((c = path[++i]) != 'u' && c != 'U') ||
2823 ((c = path[++i]) != 'x' && c != 'X')) {
2824not_a_reserved_name:
2825 path += i;
2826 continue;
2827 }
2828 break;
b6852e19
JS		 2829 case 'c': case 'C':
2830 /* COM1 ... COM9, CON, CONIN$, CONOUT$ */
4dc42c6c
JS		 2831 if ((c = path[++i]) != 'o' && c != 'O')
2832 goto not_a_reserved_name;
2833 c = path[++i];
b6852e19
JS		 2834 if (c == 'm' || c == 'M') { /* COM1 ... COM9 */
2835 c = path[++i];
2836 if (c < '1' || c > '9')
4dc42c6c
JS		 2837 goto not_a_reserved_name;
2838 } else if (c == 'n' || c == 'N') { /* CON */
2839 c = path[i + 1];
2840 if ((c == 'i' || c == 'I') &&
2841 ((c = path[i + 2]) == 'n' ||
2842 c == 'N') &&
2843 path[i + 3] == '$')
2844 i += 3; /* CONIN$ */
2845 else if ((c == 'o' || c == 'O') &&
2846 ((c = path[i + 2]) == 'u' ||
2847 c == 'U') &&
2848 ((c = path[i + 3]) == 't' ||
2849 c == 'T') &&
2850 path[i + 4] == '$')
2851 i += 4; /* CONOUT$ */
2852 } else
2853 goto not_a_reserved_name;
2854 break;
2855 case 'l': case 'L': /* LPT<N> */
2856 if (((c = path[++i]) != 'p' && c != 'P') ||
2857 ((c = path[++i]) != 't' && c != 'T') ||
2858 !isdigit(path[++i]))
2859 goto not_a_reserved_name;
2860 break;
2861 case 'n': case 'N': /* NUL */
2862 if (((c = path[++i]) != 'u' && c != 'U') ||
2863 ((c = path[++i]) != 'l' && c != 'L') ||
2864 (allow_literal_nul &&
2865 !path[i + 1] && p == path))
2866 goto not_a_reserved_name;
2867 break;
2868 case 'p': case 'P': /* PRN */
2869 if (((c = path[++i]) != 'r' && c != 'R') ||
2870 ((c = path[++i]) != 'n' && c != 'N'))
2871 goto not_a_reserved_name;
2872 break;
2873 default:
2874 continue;
2875 }
2876
2877 /*
2878 * So far, this looks like a reserved name. Let's see
2879 * whether it actually is one: trailing spaces, a file
2880 * extension, or an NTFS Alternate Data Stream do not
2881 * matter, the name is still reserved if any of those
2882 * follow immediately after the actual name.
2883 */
2884 i++;
2885 if (path[i] == ' ') {
2886 preceding_space_or_period = 1;
2887 while (path[++i] == ' ')
2888 ; /* skip all spaces */
2889 }
2890
2891 c = path[i];
9fd512c8 2892 if (c && c != '.' && c != ':' && !is_xplatform_dir_sep(c))
4dc42c6c
JS		 2893 goto not_a_reserved_name;
2894
2895 /* contains reserved name */
2896 return 0;
d2c84dad
JS		 2897 case '.':
2898 periods++;
2899 /* fallthru */
2900 case ' ':
2901 preceding_space_or_period = 1;
2902 i++;
2903 continue;
817ddd64
JS		 2904 case ':': /* DOS drive prefix was already skipped */
2905 case '<': case '>': case '"': case '|': case '?': case '*':
2906 /* illegal character */
2907 return 0;
2908 default:
2909 if (c > '\0' && c < '\x20')
2910 /* illegal character */
2911 return 0;
d2c84dad
JS		 2912 }
2913 preceding_space_or_period = 0;
2914 i++;
2915 }
2916}
2917
396ff754 2918#if !defined(_MSC_VER)
5901dc66
KB		 2919/*
2920 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2921 * mingw startup code, see init.c in mingw runtime).
2922 */
2923int _CRT_glob = 0;
396ff754 2924#endif
3f046148 2925
0767172b 2926static NORETURN void die_startup(void)
3f046148
KB		 2927{
2928 fputs("fatal: not enough memory for initialization", stderr);
2929 exit(128);
2930}
2931
6f1c189c
KB		 2932static void *malloc_startup(size_t size)
2933{
2934 void *result = malloc(size);
2935 if (!result)
2936 die_startup();
2937 return result;
2938}
2939
2940static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2941{
2942 len = xwcstoutf(buffer, wcs, len) + 1;
2943 return memcpy(malloc_startup(len), buffer, len);
2944}
2945
3f944424
JS		 2946static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2947 DWORD desired_access, DWORD flags)
2948{
2949 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2950 wchar_t buf[MAX_PATH];
2951 DWORD max = ARRAY_SIZE(buf);
2952 HANDLE handle;
2953 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2954
2955 if (!ret || ret >= max)
2956 return;
2957
2958 /* make sure this does not leak into child processes */
2959 SetEnvironmentVariableW(key, NULL);
2960 if (!wcscmp(buf, L"off")) {
2961 close(fd);
2962 handle = GetStdHandle(std_id);
2963 if (handle != INVALID_HANDLE_VALUE)
2964 CloseHandle(handle);
2965 return;
2966 }
1a172e4a
JS		 2967 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2968 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2969 if (handle == INVALID_HANDLE_VALUE) {
2970 close(fd);
2971 handle = GetStdHandle(std_id);
2972 if (handle != INVALID_HANDLE_VALUE)
2973 CloseHandle(handle);
2974 } else {
2975 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2976 SetStdHandle(std_id, handle);
2977 dup2(new_fd, fd);
2978 /* do *not* close the new_fd: that would close stdout */
2979 }
2980 return;
2981 }
3f944424
JS		 2982 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2983 flags, NULL);
2984 if (handle != INVALID_HANDLE_VALUE) {
2985 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2986 SetStdHandle(std_id, handle);
2987 dup2(new_fd, fd);
2988 close(new_fd);
2989 }
2990}
2991
2992static void maybe_redirect_std_handles(void)
2993{
2994 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2995 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2996 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2997 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2998 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2999 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
3000}
3001
dce7d295
JH		 3002#ifdef _MSC_VER
3003#ifdef _DEBUG
3004#include <crtdbg.h>
3005#endif
3006#endif
3007
396ff754
JS		 3008/*
3009 * We implement wmain() and compile with -municode, which would
3010 * normally ignore main(), but we call the latter from the former
3011 * so that we can handle non-ASCII command-line parameters
3012 * appropriately.
3013 *
3014 * To be more compatible with the core git code, we convert
3015 * argv into UTF8 and pass them directly to main().
3016 */
3017int wmain(int argc, const wchar_t **wargv)
13f1df43 3018{
396ff754
JS		 3019 int i, maxlen, exit_status;
3020 char *buffer, **save;
3021 const char **argv;
3f046148 3022
a0897249
JH		 3023 trace2_initialize_clock();
3024
556702f8 3025#ifdef _MSC_VER
f6a63937
JS		 3026#ifdef _DEBUG
3027 _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
3028#endif
3029
556702f8
JH		 3030#ifdef USE_MSVC_CRTDBG
3031 _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
3032#endif
3033#endif
3034
3f944424
JS		 3035 maybe_redirect_std_handles();
3036
3f046148 3037 /* determine size of argv and environ conversion buffer */
86e25458 3038 maxlen = wcslen(wargv[0]);
3f046148
KB		 3039 for (i = 1; i < argc; i++)
3040 maxlen = max(maxlen, wcslen(wargv[i]));
3041
3042 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
3043 maxlen = 3 * maxlen + 1;
6f1c189c 3044 buffer = malloc_startup(maxlen);
3f046148 3045
396ff754
JS		 3046 /*
3047 * Create a UTF-8 version of w_argv. Also create a "save" copy
3048 * to remember all the string pointers because parse_options()
3049 * will remove claimed items from the argv that we pass down.
3050 */
3051 ALLOC_ARRAY(argv, argc + 1);
3052 ALLOC_ARRAY(save, argc + 1);
86e25458 3053 for (i = 0; i < argc; i++)
396ff754
JS		 3054 argv[i] = save[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
3055 argv[i] = save[i] = NULL;
3f046148 3056 free(buffer);
13f1df43 3057
6dc71543 3058 /* fix Windows specific environment settings */
02e6edc0 3059 setup_windows_environment();
baea068d 3060
0e218f91
JS		 3061 unset_environment_variables = xstrdup("PERL5LIB");
3062
13f1df43
KB		 3063 /* initialize critical section for waitpid pinfo_t list */
3064 InitializeCriticalSection(&pinfo_cs);
3065
3066 /* set up default file mode and file modes for stdin/out/err */
3067 _fmode = _O_BINARY;
3068 _setmode(_fileno(stdin), _O_BINARY);
3069 _setmode(_fileno(stdout), _O_BINARY);
3070 _setmode(_fileno(stderr), _O_BINARY);
eac14f89
KB		 3071
3072 /* initialize Unicode console */
3073 winansi_init();
396ff754
JS		 3074
3075 /* invoke the real main() using our utf8 version of argv. */
3076 exit_status = main(argc, argv);
3077
3078 for (i = 0; i < argc; i++)
3079 free(save[i]);
3080 free(save);
3081 free(argv);
3082
3083 return exit_status;
13f1df43 3084}
7b6aff06
NTND		 3085
3086int uname(struct utsname *buf)
3087{
d62c89af 3088 unsigned v = (unsigned)GetVersion();
7b6aff06 3089 memset(buf, 0, sizeof(*buf));
5096d490
JK		 3090 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
3091 xsnprintf(buf->release, sizeof(buf->release),
3092 "%u.%u", v & 0xff, (v >> 8) & 0xff);
7b6aff06 3093 /* assuming NT variants only.. */
5096d490
JK		 3094 xsnprintf(buf->version, sizeof(buf->version),
3095 "%u", (v >> 16) & 0x7fff);
7b6aff06
NTND		 3096 return 0;
3097}
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