]> git.ipfire.org Git - thirdparty/git.git/blame - compat/mingw.c
projects / thirdparty / git.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
win32: fix building with NO_UNIX_SOCKETS
[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
a4e7e317
GC		 246int mingw_core_config(const char *var, const char *value,
247 const struct config_context *ctx, void *cb)
70fc5793 248{
bdfbb0ea
JS		 249 if (!strcmp(var, "core.hidedotfiles")) {
250 if (value && !strcasecmp(value, "dotgitonly"))
251 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
252 else
253 hide_dotfiles = git_config_bool(var, value);
254 return 0;
255 }
256
0e218f91 257 if (!strcmp(var, "core.unsetenvvars")) {
ba176db5
JK		 258 if (!value)
259 return config_error_nonbool(var);
0e218f91
JS		 260 free(unset_environment_variables);
261 unset_environment_variables = xstrdup(value);
262 return 0;
263 }
264
ac33519d
JS		 265 if (!strcmp(var, "core.restrictinheritedhandles")) {
266 if (value && !strcasecmp(value, "auto"))
267 core_restrict_inherited_handles = -1;
268 else
269 core_restrict_inherited_handles =
270 git_config_bool(var, value);
271 return 0;
272 }
273
70fc5793
JS		 274 return 0;
275}
276
4745feeb
AS		 277/* Normalizes NT paths as returned by some low-level APIs. */
278static wchar_t *normalize_ntpath(wchar_t *wbuf)
279{
280 int i;
281 /* fix absolute path prefixes */
282 if (wbuf[0] == '\\') {
283 /* strip NT namespace prefixes */
284 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
285 !wcsncmp(wbuf, L"\\\\?\\", 4))
286 wbuf += 4;
287 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
288 wbuf += 12;
289 /* replace remaining '...UNC\' with '\\' */
290 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
291 wbuf += 2;
292 *wbuf = '\\';
293 }
294 }
295 /* convert backslashes to slashes */
296 for (i = 0; wbuf[i]; i++)
297 if (wbuf[i] == '\\')
298 wbuf[i] = '/';
299 return wbuf;
300}
301
337967fb
HV		 302int mingw_unlink(const char *pathname)
303{
19e12549 304 int ret, tries = 0;
85faec9d
KB		 305 wchar_t wpathname[MAX_PATH];
306 if (xutftowcs_path(wpathname, pathname) < 0)
307 return -1;
19e12549 308
680e0b45
JH		 309 if (DeleteFileW(wpathname))
310 return 0;
311
337967fb 312 /* read-only files cannot be removed */
85faec9d
KB		 313 _wchmod(wpathname, 0666);
314 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
19e12549
HV		 315 if (!is_file_in_use_error(GetLastError()))
316 break;
317 /*
318 * We assume that some other process had the source or
319 * destination file open at the wrong moment and retry.
320 * In order to give the other process a higher chance to
321 * complete its operation, we give up our time slice now.
322 * If we have to retry again, we do sleep a bit.
323 */
324 Sleep(delay[tries]);
325 tries++;
326 }
c9b78400
HV		 327 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
328 ask_yes_no_if_possible("Unlink of file '%s' failed. "
329 "Should I try again?", pathname))
85faec9d 330 ret = _wunlink(wpathname);
19e12549 331 return ret;
337967fb
HV		 332}
333
85faec9d 334static int is_dir_empty(const wchar_t *wpath)
ab1a11be 335{
85faec9d 336 WIN32_FIND_DATAW findbuf;
ab1a11be 337 HANDLE handle;
85faec9d
KB		 338 wchar_t wbuf[MAX_PATH + 2];
339 wcscpy(wbuf, wpath);
340 wcscat(wbuf, L"\\*");
341 handle = FindFirstFileW(wbuf, &findbuf);
342 if (handle == INVALID_HANDLE_VALUE)
ab1a11be 343 return GetLastError() == ERROR_NO_MORE_FILES;
ab1a11be 344
85faec9d
KB		 345 while (!wcscmp(findbuf.cFileName, L".") ||
346 !wcscmp(findbuf.cFileName, L".."))
347 if (!FindNextFileW(handle, &findbuf)) {
348 DWORD err = GetLastError();
349 FindClose(handle);
350 return err == ERROR_NO_MORE_FILES;
ab1a11be
JS		 351 }
352 FindClose(handle);
ab1a11be
JS		 353 return 0;
354}
355
4f288100
HV		 356int mingw_rmdir(const char *pathname)
357{
358 int ret, tries = 0;
85faec9d 359 wchar_t wpathname[MAX_PATH];
3e7d4888
TB		 360 struct stat st;
361
362 /*
363 * Contrary to Linux' `rmdir()`, Windows' _wrmdir() and _rmdir()
364 * (and `RemoveDirectoryW()`) will attempt to remove the target of a
365 * symbolic link (if it points to a directory).
366 *
367 * This behavior breaks the assumption of e.g. `remove_path()` which
368 * upon successful deletion of a file will attempt to remove its parent
369 * directories recursively until failure (which usually happens when
370 * the directory is not empty).
371 *
372 * Therefore, before calling `_wrmdir()`, we first check if the path is
373 * a symbolic link. If it is, we exit and return the same error as
374 * Linux' `rmdir()` would, i.e. `ENOTDIR`.
375 */
376 if (!mingw_lstat(pathname, &st) && S_ISLNK(st.st_mode)) {
377 errno = ENOTDIR;
378 return -1;
379 }
380
85faec9d
KB		 381 if (xutftowcs_path(wpathname, pathname) < 0)
382 return -1;
4f288100 383
85faec9d 384 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
4f288100 385 if (!is_file_in_use_error(GetLastError()))
a83b2b57
EFL		 386 errno = err_win_to_posix(GetLastError());
387 if (errno != EACCES)
4f288100 388 break;
85faec9d 389 if (!is_dir_empty(wpathname)) {
ab1a11be
JS		 390 errno = ENOTEMPTY;
391 break;
392 }
4f288100
HV		 393 /*
394 * We assume that some other process had the source or
395 * destination file open at the wrong moment and retry.
396 * In order to give the other process a higher chance to
397 * complete its operation, we give up our time slice now.
398 * If we have to retry again, we do sleep a bit.
399 */
400 Sleep(delay[tries]);
401 tries++;
402 }
a83b2b57 403 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
4f288100
HV		 404 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
405 "Should I try again?", pathname))
85faec9d 406 ret = _wrmdir(wpathname);
684dd4c2
MT		 407 if (!ret)
408 invalidate_lstat_cache();
85faec9d
KB		 409 return ret;
410}
411
f30afdab
JS		 412static inline int needs_hiding(const char *path)
413{
414 const char *basename;
415
416 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
417 return 0;
418
419 /* We cannot use basename(), as it would remove trailing slashes */
1cadad6f 420 win32_skip_dos_drive_prefix((char **)&path);
f30afdab
JS		 421 if (!*path)
422 return 0;
423
424 for (basename = path; *path; path++)
425 if (is_dir_sep(*path)) {
426 do {
427 path++;
428 } while (is_dir_sep(*path));
429 /* ignore trailing slashes */
430 if (*path)
431 basename = path;
60e6569a
JS		 432 else
433 break;
f30afdab
JS		 434 }
435
436 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
437 return *basename == '.';
438
439 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
440 return !strncasecmp(".git", basename, 4) &&
441 (!basename[4] || is_dir_sep(basename[4]));
442}
443
444static int set_hidden_flag(const wchar_t *path, int set)
445{
446 DWORD original = GetFileAttributesW(path), modified;
447 if (set)
448 modified = original | FILE_ATTRIBUTE_HIDDEN;
449 else
450 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
451 if (original == modified || SetFileAttributesW(path, modified))
452 return 0;
453 errno = err_win_to_posix(GetLastError());
454 return -1;
455}
456
85faec9d
KB		 457int mingw_mkdir(const char *path, int mode)
458{
459 int ret;
460 wchar_t wpath[MAX_PATH];
d2c84dad 461
4dc42c6c 462 if (!is_valid_win32_path(path, 0)) {
d2c84dad
JS		 463 errno = EINVAL;
464 return -1;
465 }
466
85faec9d
KB		 467 if (xutftowcs_path(wpath, path) < 0)
468 return -1;
469 ret = _wmkdir(wpath);
f30afdab
JS		 470 if (!ret && needs_hiding(path))
471 return set_hidden_flag(wpath, 1);
4f288100
HV		 472 return ret;
473}
474
eeaf7dda
JH		 475/*
476 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
477 * is documented in [1] as opening a writable file handle in append mode.
478 * (It is believed that) this is atomic since it is maintained by the
479 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
480 *
481 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
482 *
483 * This trick does not appear to work for named pipes. Instead it creates
484 * a named pipe client handle that cannot be written to. Callers should
485 * just use the regular _wopen() for them. (And since client handle gets
486 * bound to a unique server handle, it isn't really an issue.)
487 */
d6410975
JS		 488static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
489{
490 HANDLE handle;
491 int fd;
492 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
493
494 /* only these flags are supported */
495 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
496 return errno = ENOSYS, -1;
497
498 /*
499 * FILE_SHARE_WRITE is required to permit child processes
500 * to append to the file.
501 */
502 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
503 FILE_SHARE_WRITE | FILE_SHARE_READ,
504 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
23eafd92
NS		 505 if (handle == INVALID_HANDLE_VALUE) {
506 DWORD err = GetLastError();
507
508 /*
509 * Some network storage solutions (e.g. Isilon) might return
510 * ERROR_INVALID_PARAMETER instead of expected error
511 * ERROR_PATH_NOT_FOUND, which results in an unknown error. If
512 * so, let's turn the error to ERROR_PATH_NOT_FOUND instead.
513 */
514 if (err == ERROR_INVALID_PARAMETER)
515 err = ERROR_PATH_NOT_FOUND;
516
517 errno = err_win_to_posix(err);
518 return -1;
519 }
eeaf7dda 520
d6410975
JS		 521 /*
522 * No O_APPEND here, because the CRT uses it only to reset the
eeaf7dda
JH		 523 * file pointer to EOF before each write(); but that is not
524 * necessary (and may lead to races) for a file created with
525 * FILE_APPEND_DATA.
d6410975
JS		 526 */
527 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
528 if (fd < 0)
529 CloseHandle(handle);
530 return fd;
531}
532
eeaf7dda
JH		 533/*
534 * Does the pathname map to the local named pipe filesystem?
535 * That is, does it have a "//./pipe/" prefix?
536 */
537static int is_local_named_pipe_path(const char *filename)
538{
539 return (is_dir_sep(filename[0]) &&
540 is_dir_sep(filename[1]) &&
541 filename[2] == '.' &&
542 is_dir_sep(filename[3]) &&
543 !strncasecmp(filename+4, "pipe", 4) &&
544 is_dir_sep(filename[8]) &&
545 filename[9]);
546}
547
3e4a1ba0
JS		 548int mingw_open (const char *filename, int oflags, ...)
549{
d6410975 550 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
3e4a1ba0
JS		 551 va_list args;
552 unsigned mode;
d2c84dad 553 int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
85faec9d 554 wchar_t wfilename[MAX_PATH];
d6410975 555 open_fn_t open_fn;
0d30ad71 556
3e4a1ba0
JS		 557 va_start(args, oflags);
558 mode = va_arg(args, int);
559 va_end(args);
560
4dc42c6c 561 if (!is_valid_win32_path(filename, !create)) {
d2c84dad
JS		 562 errno = create ? EINVAL : ENOENT;
563 return -1;
564 }
565
eeaf7dda 566 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
d6410975
JS		 567 open_fn = mingw_open_append;
568 else
569 open_fn = _wopen;
570
98d9b23e
JS		 571 if (filename && !strcmp(filename, "/dev/null"))
572 wcscpy(wfilename, L"nul");
573 else if (xutftowcs_path(wfilename, filename) < 0)
85faec9d 574 return -1;
98d9b23e 575
d6410975 576 fd = open_fn(wfilename, oflags, mode);
0d30ad71 577
ba6fad02 578 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
85faec9d 579 DWORD attrs = GetFileAttributesW(wfilename);
3e4a1ba0
JS		 580 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
581 errno = EISDIR;
582 }
f30afdab
JS		 583 if ((oflags & O_CREAT) && needs_hiding(filename)) {
584 /*
585 * Internally, _wopen() uses the CreateFile() API which errors
586 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
587 * specified and an already existing file's attributes do not
588 * match *exactly*. As there is no mode or flag we can set that
589 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
590 * again *without* the O_CREAT flag (that corresponds to the
591 * CREATE_ALWAYS flag of CreateFile()).
592 */
593 if (fd < 0 && errno == EACCES)
d6410975 594 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
f30afdab
JS		 595 if (fd >= 0 && set_hidden_flag(wfilename, 1))
596 warning("could not mark '%s' as hidden.", filename);
597 }
3e4a1ba0
JS		 598 return fd;
599}
600
176478a8
EFL		 601static BOOL WINAPI ctrl_ignore(DWORD type)
602{
603 return TRUE;
604}
605
606#undef fgetc
607int mingw_fgetc(FILE *stream)
608{
609 int ch;
610 if (!isatty(_fileno(stream)))
611 return fgetc(stream);
612
613 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
614 while (1) {
615 ch = fgetc(stream);
616 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
617 break;
618
619 /* Ctrl+C was pressed, simulate SIGINT and retry */
620 mingw_raise(SIGINT);
621 }
622 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
623 return ch;
624}
625
3fdcdbdf
JS		 626#undef fopen
627FILE *mingw_fopen (const char *filename, const char *otype)
628{
f30afdab 629 int hide = needs_hiding(filename);
85faec9d
KB		 630 FILE *file;
631 wchar_t wfilename[MAX_PATH], wotype[4];
4dc42c6c
JS		 632 if (filename && !strcmp(filename, "/dev/null"))
633 wcscpy(wfilename, L"nul");
634 else if (!is_valid_win32_path(filename, 1)) {
d2c84dad
JS		 635 int create = otype && strchr(otype, 'w');
636 errno = create ? EINVAL : ENOENT;
637 return NULL;
4dc42c6c 638 } else if (xutftowcs_path(wfilename, filename) < 0)
85faec9d 639 return NULL;
98d9b23e
JS		 640
641 if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
85faec9d 642 return NULL;
98d9b23e 643
f30afdab
JS		 644 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
645 error("could not unhide %s", filename);
646 return NULL;
647 }
85faec9d 648 file = _wfopen(wfilename, wotype);
e5b31344
JS		 649 if (!file && GetLastError() == ERROR_INVALID_NAME)
650 errno = ENOENT;
f30afdab
JS		 651 if (file && hide && set_hidden_flag(wfilename, 1))
652 warning("could not mark '%s' as hidden.", filename);
85faec9d 653 return file;
3fdcdbdf
JS		 654}
655
3fdcdbdf
JS		 656FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
657{
f30afdab 658 int hide = needs_hiding(filename);
85faec9d
KB		 659 FILE *file;
660 wchar_t wfilename[MAX_PATH], wotype[4];
4dc42c6c
JS		 661 if (filename && !strcmp(filename, "/dev/null"))
662 wcscpy(wfilename, L"nul");
663 else if (!is_valid_win32_path(filename, 1)) {
d2c84dad
JS		 664 int create = otype && strchr(otype, 'w');
665 errno = create ? EINVAL : ENOENT;
666 return NULL;
4dc42c6c 667 } else if (xutftowcs_path(wfilename, filename) < 0)
85faec9d 668 return NULL;
98d9b23e
JS		 669
670 if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
85faec9d 671 return NULL;
98d9b23e 672
f30afdab
JS		 673 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
674 error("could not unhide %s", filename);
675 return NULL;
676 }
85faec9d 677 file = _wfreopen(wfilename, wotype, stream);
f30afdab
JS		 678 if (file && hide && set_hidden_flag(wfilename, 1))
679 warning("could not mark '%s' as hidden.", filename);
85faec9d 680 return file;
3fdcdbdf
JS		 681}
682
84adb641
JS		 683#undef fflush
684int mingw_fflush(FILE *stream)
685{
686 int ret = fflush(stream);
687
688 /*
689 * write() is used behind the scenes of stdio output functions.
690 * Since git code does not check for errors after each stdio write
691 * operation, it can happen that write() is called by a later
692 * stdio function even if an earlier write() call failed. In the
693 * case of a pipe whose readable end was closed, only the first
694 * call to write() reports EPIPE on Windows. Subsequent write()
695 * calls report EINVAL. It is impossible to notice whether this
696 * fflush invocation triggered such a case, therefore, we have to
697 * catch all EINVAL errors whole-sale.
698 */
699 if (ret && errno == EINVAL)
700 errno = EPIPE;
701
702 return ret;
703}
704
2b86292e
JS		 705#undef write
706ssize_t mingw_write(int fd, const void *buf, size_t len)
707{
708 ssize_t result = write(fd, buf, len);
709
19ed0dff
JS		 710 if (result < 0 && (errno == EINVAL || errno == ENOSPC) && buf) {
711 int orig = errno;
712
2b86292e
JS		 713 /* check if fd is a pipe */
714 HANDLE h = (HANDLE) _get_osfhandle(fd);
19ed0dff
JS		 715 if (GetFileType(h) != FILE_TYPE_PIPE)
716 errno = orig;
717 else if (orig == EINVAL)
2b86292e 718 errno = EPIPE;
19ed0dff
JS		 719 else {
720 DWORD buf_size;
721
722 if (!GetNamedPipeInfo(h, NULL, NULL, &buf_size, NULL))
723 buf_size = 4096;
724 if (len > buf_size)
725 return write(fd, buf, buf_size);
726 errno = orig;
727 }
2b86292e
JS		 728 }
729
730 return result;
731}
732
85faec9d
KB		 733int mingw_access(const char *filename, int mode)
734{
735 wchar_t wfilename[MAX_PATH];
9160068a
JS		 736 if (!strcmp("nul", filename) || !strcmp("/dev/null", filename))
737 return 0;
85faec9d
KB		 738 if (xutftowcs_path(wfilename, filename) < 0)
739 return -1;
740 /* X_OK is not supported by the MSVCRT version */
741 return _waccess(wfilename, mode & ~X_OK);
742}
743
744int mingw_chdir(const char *dirname)
745{
746 wchar_t wdirname[MAX_PATH];
747 if (xutftowcs_path(wdirname, dirname) < 0)
748 return -1;
749 return _wchdir(wdirname);
750}
751
752int mingw_chmod(const char *filename, int mode)
753{
754 wchar_t wfilename[MAX_PATH];
755 if (xutftowcs_path(wfilename, filename) < 0)
756 return -1;
757 return _wchmod(wfilename, mode);
758}
759
a6d15bc3
JS		 760/*
761 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
762 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
763 */
764static inline long long filetime_to_hnsec(const FILETIME *ft)
5411bdc4
MSO		 765{
766 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
a6d15bc3
JS		 767 /* Windows to Unix Epoch conversion */
768 return winTime - 116444736000000000LL;
769}
770
d7e8c874 771static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts)
a6d15bc3 772{
d7e8c874
KB		 773 long long hnsec = filetime_to_hnsec(ft);
774 ts->tv_sec = (time_t)(hnsec / 10000000);
775 ts->tv_nsec = (hnsec % 10000000) * 100;
5411bdc4
MSO		 776}
777
4b0abd5c
JS		 778/**
779 * Verifies that safe_create_leading_directories() would succeed.
780 */
781static int has_valid_directory_prefix(wchar_t *wfilename)
782{
783 int n = wcslen(wfilename);
784
785 while (n > 0) {
786 wchar_t c = wfilename[--n];
787 DWORD attributes;
788
789 if (!is_dir_sep(c))
790 continue;
791
792 wfilename[n] = L'\0';
793 attributes = GetFileAttributesW(wfilename);
794 wfilename[n] = c;
82ba1191
JS		 795 if (attributes &
796 (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))
4b0abd5c
JS		 797 return 1;
798 if (attributes == INVALID_FILE_ATTRIBUTES)
799 switch (GetLastError()) {
800 case ERROR_PATH_NOT_FOUND:
801 continue;
802 case ERROR_FILE_NOT_FOUND:
803 /* This implies parent directory exists. */
804 return 1;
805 }
806 return 0;
807 }
808 return 1;
809}
810
5411bdc4
MSO		 811/* We keep the do_lstat code in a separate function to avoid recursion.
812 * When a path ends with a slash, the stat will fail with ENOENT. In
813 * this case, we strip the trailing slashes and stat again.
9b9784ca
PT		 814 *
815 * If follow is true then act like stat() and report on the link
816 * target. Otherwise report on the link itself.
5411bdc4 817 */
9b9784ca 818static int do_lstat(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 819{
820 WIN32_FILE_ATTRIBUTE_DATA fdata;
85faec9d
KB		 821 wchar_t wfilename[MAX_PATH];
822 if (xutftowcs_path(wfilename, file_name) < 0)
823 return -1;
5411bdc4 824
85faec9d 825 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
5411bdc4
MSO		 826 buf->st_ino = 0;
827 buf->st_gid = 0;
828 buf->st_uid = 0;
180964f0 829 buf->st_nlink = 1;
444dc903 830 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 831 buf->st_size = fdata.nFileSizeLow |
832 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 833 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
d7e8c874
KB		 834 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
835 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
836 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
9b9784ca 837 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
85faec9d
KB		 838 WIN32_FIND_DATAW findbuf;
839 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
9b9784ca
PT		 840 if (handle != INVALID_HANDLE_VALUE) {
841 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
842 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
843 if (follow) {
844 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
845 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
846 } else {
847 buf->st_mode = S_IFLNK;
848 }
849 buf->st_mode |= S_IREAD;
850 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
851 buf->st_mode |= S_IWRITE;
852 }
853 FindClose(handle);
854 }
855 }
5411bdc4
MSO		 856 return 0;
857 }
85faec9d
KB		 858 switch (GetLastError()) {
859 case ERROR_ACCESS_DENIED:
860 case ERROR_SHARING_VIOLATION:
861 case ERROR_LOCK_VIOLATION:
862 case ERROR_SHARING_BUFFER_EXCEEDED:
863 errno = EACCES;
864 break;
865 case ERROR_BUFFER_OVERFLOW:
866 errno = ENAMETOOLONG;
867 break;
868 case ERROR_NOT_ENOUGH_MEMORY:
869 errno = ENOMEM;
870 break;
4b0abd5c
JS		 871 case ERROR_PATH_NOT_FOUND:
872 if (!has_valid_directory_prefix(wfilename)) {
873 errno = ENOTDIR;
874 break;
875 }
876 /* fallthru */
85faec9d
KB		 877 default:
878 errno = ENOENT;
879 break;
880 }
5411bdc4
MSO		 881 return -1;
882}
883
884/* We provide our own lstat/fstat functions, since the provided
885 * lstat/fstat functions are so slow. These stat functions are
886 * tailored for Git's usage (read: fast), and are not meant to be
887 * complete. Note that Git stat()s are redirected to mingw_lstat()
888 * too, since Windows doesn't really handle symlinks that well.
889 */
9b9784ca 890static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 891{
892 int namelen;
58aa3d2a 893 char alt_name[PATH_MAX];
5411bdc4 894
9b9784ca 895 if (!do_lstat(follow, file_name, buf))
5411bdc4
MSO		 896 return 0;
897
898 /* if file_name ended in a '/', Windows returned ENOENT;
899 * try again without trailing slashes
900 */
901 if (errno != ENOENT)
902 return -1;
903
904 namelen = strlen(file_name);
905 if (namelen && file_name[namelen-1] != '/')
906 return -1;
907 while (namelen && file_name[namelen-1] == '/')
908 --namelen;
909 if (!namelen || namelen >= PATH_MAX)
910 return -1;
911
912 memcpy(alt_name, file_name, namelen);
913 alt_name[namelen] = 0;
9b9784ca
PT		 914 return do_lstat(follow, alt_name, buf);
915}
916
7bf19838
JS		 917static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
918{
919 BY_HANDLE_FILE_INFORMATION fdata;
920
921 if (!GetFileInformationByHandle(hnd, &fdata)) {
922 errno = err_win_to_posix(GetLastError());
923 return -1;
924 }
925
926 buf->st_ino = 0;
927 buf->st_gid = 0;
928 buf->st_uid = 0;
929 buf->st_nlink = 1;
930 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
931 buf->st_size = fdata.nFileSizeLow |
932 (((off_t)fdata.nFileSizeHigh)<<32);
933 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
d7e8c874
KB		 934 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
935 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
936 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
7bf19838
JS		 937 return 0;
938}
939
9b9784ca
PT		 940int mingw_lstat(const char *file_name, struct stat *buf)
941{
942 return do_stat_internal(0, file_name, buf);
943}
944int mingw_stat(const char *file_name, struct stat *buf)
945{
946 return do_stat_internal(1, file_name, buf);
5411bdc4
MSO		 947}
948
180964f0 949int mingw_fstat(int fd, struct stat *buf)
5411bdc4
MSO		 950{
951 HANDLE fh = (HANDLE)_get_osfhandle(fd);
d75e6973 952 DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
5411bdc4 953
d75e6973
KB		 954 switch (type) {
955 case FILE_TYPE_DISK:
956 return get_file_info_by_handle(fh, buf);
5411bdc4 957
d75e6973
KB		 958 case FILE_TYPE_CHAR:
959 case FILE_TYPE_PIPE:
960 /* initialize stat fields */
961 memset(buf, 0, sizeof(*buf));
180964f0 962 buf->st_nlink = 1;
d75e6973
KB		 963
964 if (type == FILE_TYPE_CHAR) {
965 buf->st_mode = _S_IFCHR;
966 } else {
967 buf->st_mode = _S_IFIFO;
968 if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
969 buf->st_size = avail;
970 }
5411bdc4 971 return 0;
7bf19838 972
d75e6973
KB		 973 default:
974 errno = EBADF;
975 return -1;
5411bdc4 976 }
5411bdc4
MSO		 977}
978
7c0ffa1c
JS		 979static inline void time_t_to_filetime(time_t t, FILETIME *ft)
980{
981 long long winTime = t * 10000000LL + 116444736000000000LL;
982 ft->dwLowDateTime = winTime;
983 ft->dwHighDateTime = winTime >> 32;
984}
985
986int mingw_utime (const char *file_name, const struct utimbuf *times)
987{
988 FILETIME mft, aft;
090a3085 989 int rc;
85faec9d
KB		 990 DWORD attrs;
991 wchar_t wfilename[MAX_PATH];
090a3085
TK		 992 HANDLE osfilehandle;
993
85faec9d
KB		 994 if (xutftowcs_path(wfilename, file_name) < 0)
995 return -1;
7c0ffa1c
JS		 996
997 /* must have write permission */
85faec9d 998 attrs = GetFileAttributesW(wfilename);
852f098c
JS		 999 if (attrs != INVALID_FILE_ATTRIBUTES &&
1000 (attrs & FILE_ATTRIBUTE_READONLY)) {
1001 /* ignore errors here; open() will report them */
85faec9d 1002 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
852f098c
JS		 1003 }
1004
090a3085
TK		 1005 osfilehandle = CreateFileW(wfilename,
1006 FILE_WRITE_ATTRIBUTES,
1007 0 /*FileShare.None*/,
1008 NULL,
1009 OPEN_EXISTING,
1010 (attrs != INVALID_FILE_ATTRIBUTES &&
1011 (attrs & FILE_ATTRIBUTE_DIRECTORY)) ?
1012 FILE_FLAG_BACKUP_SEMANTICS : 0,
1013 NULL);
1014 if (osfilehandle == INVALID_HANDLE_VALUE) {
1015 errno = err_win_to_posix(GetLastError());
852f098c
JS		 1016 rc = -1;
1017 goto revert_attrs;
1018 }
7c0ffa1c 1019
ded2d476
SG		 1020 if (times) {
1021 time_t_to_filetime(times->modtime, &mft);
1022 time_t_to_filetime(times->actime, &aft);
1023 } else {
1024 GetSystemTimeAsFileTime(&mft);
1025 aft = mft;
1026 }
090a3085
TK		 1027
1028 if (!SetFileTime(osfilehandle, NULL, &aft, &mft)) {
7c0ffa1c
JS		 1029 errno = EINVAL;
1030 rc = -1;
1031 } else
1032 rc = 0;
090a3085
TK		 1033
1034 if (osfilehandle != INVALID_HANDLE_VALUE)
1035 CloseHandle(osfilehandle);
852f098c
JS		 1036
1037revert_attrs:
1038 if (attrs != INVALID_FILE_ATTRIBUTES &&
1039 (attrs & FILE_ATTRIBUTE_READONLY)) {
1040 /* ignore errors again */
85faec9d 1041 SetFileAttributesW(wfilename, attrs);
852f098c 1042 }
7c0ffa1c
JS		 1043 return rc;
1044}
1045
9ee0540a
JS		 1046#undef strftime
1047size_t mingw_strftime(char *s, size_t max,
1048 const char *format, const struct tm *tm)
1049{
a748f3f3
MA		 1050 /* a pointer to the original strftime in case we can't find the UCRT version */
1051 static size_t (*fallback)(char *, size_t, const char *, const struct tm *) = strftime;
1052 size_t ret;
4a9b2049 1053 DECLARE_PROC_ADDR(ucrtbase.dll, size_t, __cdecl, strftime, char *, size_t,
a748f3f3
MA		 1054 const char *, const struct tm *);
1055
1056 if (INIT_PROC_ADDR(strftime))
1057 ret = strftime(s, max, format, tm);
1058 else
1059 ret = fallback(s, max, format, tm);
9ee0540a
JS		 1060
1061 if (!ret && errno == EINVAL)
1062 die("invalid strftime format: '%s'", format);
1063 return ret;
1064}
1065
f4626df5
JS		 1066unsigned int sleep (unsigned int seconds)
1067{
1068 Sleep(seconds*1000);
1069 return 0;
1070}
1071
85faec9d
KB		 1072char *mingw_mktemp(char *template)
1073{
1074 wchar_t wtemplate[MAX_PATH];
1075 if (xutftowcs_path(wtemplate, template) < 0)
1076 return NULL;
1077 if (!_wmktemp(wtemplate))
1078 return NULL;
1079 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
1080 return NULL;
1081 return template;
1082}
1083
f4626df5
JS		 1084int mkstemp(char *template)
1085{
ae25974d 1086 return git_mkstemp_mode(template, 0600);
f4626df5
JS		 1087}
1088
1089int gettimeofday(struct timeval *tv, void *tz)
1090{
a6d15bc3
JS		 1091 FILETIME ft;
1092 long long hnsec;
1093
1094 GetSystemTimeAsFileTime(&ft);
1095 hnsec = filetime_to_hnsec(&ft);
1096 tv->tv_sec = hnsec / 10000000;
1097 tv->tv_usec = (hnsec % 10000000) / 10;
a42a0c2e 1098 return 0;
f4626df5
JS		 1099}
1100
897bb8cb
JS		 1101int pipe(int filedes[2])
1102{
3e34d665 1103 HANDLE h[2];
897bb8cb 1104
3e34d665
JS		 1105 /* this creates non-inheritable handles */
1106 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
1107 errno = err_win_to_posix(GetLastError());
897bb8cb
JS		 1108 return -1;
1109 }
7c00bc39 1110 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
3e34d665 1111 if (filedes[0] < 0) {
897bb8cb
JS		 1112 CloseHandle(h[0]);
1113 CloseHandle(h[1]);
1114 return -1;
1115 }
7c00bc39 1116 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
c3cb7b6f 1117 if (filedes[1] < 0) {
897bb8cb 1118 close(filedes[0]);
897bb8cb
JS		 1119 CloseHandle(h[1]);
1120 return -1;
1121 }
897bb8cb
JS		 1122 return 0;
1123}
1124
9e12400d 1125#ifndef __MINGW64__
f4626df5
JS		 1126struct tm *gmtime_r(const time_t *timep, struct tm *result)
1127{
0109d676
ĐTCD		 1128 if (gmtime_s(result, timep) == 0)
1129 return result;
1130 return NULL;
f4626df5
JS		 1131}
1132
1133struct tm *localtime_r(const time_t *timep, struct tm *result)
1134{
0109d676
ĐTCD		 1135 if (localtime_s(result, timep) == 0)
1136 return result;
1137 return NULL;
f4626df5 1138}
9e12400d 1139#endif
f4626df5 1140
25fe217b
JS		 1141char *mingw_getcwd(char *pointer, int len)
1142{
937974fc
JS		 1143 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
1144 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
1145
1146 if (!ret || ret >= ARRAY_SIZE(cwd)) {
1147 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
1148 return NULL;
1149 }
1150 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
4745feeb
AS		 1151 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
1152 HANDLE hnd = CreateFileW(cwd, 0,
1153 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
1154 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
1155 if (hnd == INVALID_HANDLE_VALUE)
1156 return NULL;
1157 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
1158 CloseHandle(hnd);
1159 if (!ret || ret >= ARRAY_SIZE(wpointer))
1160 return NULL;
1161 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
1162 return NULL;
1163 return pointer;
1164 }
937974fc 1165 if (!ret || ret >= ARRAY_SIZE(wpointer))
85faec9d 1166 return NULL;
e2724c1e
JS		 1167 if (GetFileAttributesW(wpointer) == INVALID_FILE_ATTRIBUTES) {
1168 errno = ENOENT;
1169 return NULL;
1170 }
85faec9d
KB		 1171 if (xwcstoutf(pointer, wpointer, len) < 0)
1172 return NULL;
8e9b2080 1173 convert_slashes(pointer);
85faec9d 1174 return pointer;
25fe217b
JS		 1175}
1176
7e5d7768 1177/*
2ef2ae29
JS		 1178 * See "Parsing C++ Command-Line Arguments" at Microsoft's Docs:
1179 * https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments
7e5d7768 1180 */
9e9da23c 1181static const char *quote_arg_msvc(const char *arg)
7e5d7768
JS		 1182{
1183 /* count chars to quote */
1184 int len = 0, n = 0;
1185 int force_quotes = 0;
1186 char *q, *d;
1187 const char *p = arg;
1188 if (!*p) force_quotes = 1;
1189 while (*p) {
3aea1a5a 1190 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
7e5d7768
JS		 1191 force_quotes = 1;
1192 else if (*p == '"')
1193 n++;
1194 else if (*p == '\\') {
1195 int count = 0;
1196 while (*p == '\\') {
1197 count++;
1198 p++;
1199 len++;
1200 }
6d868416 1201 if (*p == '"' || !*p)
7e5d7768
JS		 1202 n += count*2 + 1;
1203 continue;
1204 }
1205 len++;
1206 p++;
1207 }
1208 if (!force_quotes && n == 0)
1209 return arg;
1210
1211 /* insert \ where necessary */
50a6c8ef 1212 d = q = xmalloc(st_add3(len, n, 3));
7e5d7768
JS		 1213 *d++ = '"';
1214 while (*arg) {
1215 if (*arg == '"')
1216 *d++ = '\\';
1217 else if (*arg == '\\') {
1218 int count = 0;
1219 while (*arg == '\\') {
1220 count++;
1221 *d++ = *arg++;
1222 }
6d868416 1223 if (*arg == '"' || !*arg) {
7e5d7768
JS		 1224 while (count-- > 0)
1225 *d++ = '\\';
6d868416
JS		 1226 /* don't escape the surrounding end quote */
1227 if (!*arg)
1228 break;
7e5d7768
JS		 1229 *d++ = '\\';
1230 }
1231 }
1232 *d++ = *arg++;
1233 }
1234 *d++ = '"';
6d868416 1235 *d++ = '\0';
7e5d7768
JS		 1236 return q;
1237}
1238
9e9da23c
JS		 1239#include "quote.h"
1240
1241static const char *quote_arg_msys2(const char *arg)
1242{
1243 struct strbuf buf = STRBUF_INIT;
1244 const char *p2 = arg, *p;
1245
1246 for (p = arg; *p; p++) {
1247 int ws = isspace(*p);
7d8b6769
JS		 1248 if (!ws && *p != '\\' && *p != '"' && *p != '{' && *p != '\'' &&
1249 *p != '?' && *p != '*' && *p != '~')
9e9da23c
JS		 1250 continue;
1251 if (!buf.len)
1252 strbuf_addch(&buf, '"');
1253 if (p != p2)
1254 strbuf_add(&buf, p2, p - p2);
7d8b6769 1255 if (*p == '\\' || *p == '"')
9e9da23c
JS		 1256 strbuf_addch(&buf, '\\');
1257 p2 = p;
1258 }
1259
1260 if (p == arg)
1261 strbuf_addch(&buf, '"');
1262 else if (!buf.len)
1263 return arg;
1264 else
04522edb 1265 strbuf_add(&buf, p2, p - p2);
9e9da23c
JS		 1266
1267 strbuf_addch(&buf, '"');
1268 return strbuf_detach(&buf, 0);
1269}
1270
f1a4dfb8
JS		 1271static const char *parse_interpreter(const char *cmd)
1272{
1273 static char buf[100];
1274 char *p, *opt;
1275 int n, fd;
1276
1277 /* don't even try a .exe */
1278 n = strlen(cmd);
1279 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1280 return NULL;
1281
1282 fd = open(cmd, O_RDONLY);
1283 if (fd < 0)
1284 return NULL;
1285 n = read(fd, buf, sizeof(buf)-1);
1286 close(fd);
1287 if (n < 4) /* at least '#!/x' and not error */
1288 return NULL;
1289
1290 if (buf[0] != '#' || buf[1] != '!')
1291 return NULL;
1292 buf[n] = '\0';
bedc4279
PH		 1293 p = buf + strcspn(buf, "\r\n");
1294 if (!*p)
f1a4dfb8
JS		 1295 return NULL;
1296
1297 *p = '\0';
1298 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1299 return NULL;
1300 /* strip options */
1301 if ((opt = strchr(p+1, ' ')))
1302 *opt = '\0';
1303 return p+1;
1304}
1305
f1a4dfb8
JS		 1306/*
1307 * exe_only means that we only want to detect .exe files, but not scripts
1308 * (which do not have an extension)
1309 */
e0ca1ca2
RS		 1310static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1311 int isexe, int exe_only)
f1a4dfb8
JS		 1312{
1313 char path[MAX_PATH];
4e1a641e 1314 wchar_t wpath[MAX_PATH];
e0ca1ca2 1315 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
f1a4dfb8 1316
4e1a641e
AR		 1317 if (xutftowcs_path(wpath, path) < 0)
1318 return NULL;
1319
1320 if (!isexe && _waccess(wpath, F_OK) == 0)
f1a4dfb8 1321 return xstrdup(path);
4e1a641e
AR		 1322 wpath[wcslen(wpath)-4] = '\0';
1323 if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
1324 if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY)) {
1325 path[strlen(path)-4] = '\0';
fe77b695 1326 return xstrdup(path);
4e1a641e
AR		 1327 }
1328 }
f1a4dfb8
JS		 1329 return NULL;
1330}
1331
1332/*
22e5e58a 1333 * Determines the absolute path of cmd using the split path in path.
f1a4dfb8
JS		 1334 * If cmd contains a slash or backslash, no lookup is performed.
1335 */
e0ca1ca2 1336static char *path_lookup(const char *cmd, int exe_only)
f1a4dfb8 1337{
e0ca1ca2 1338 const char *path;
f1a4dfb8
JS		 1339 char *prog = NULL;
1340 int len = strlen(cmd);
1341 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1342
2ce6d075 1343 if (strpbrk(cmd, "/\\"))
e0ca1ca2
RS		 1344 return xstrdup(cmd);
1345
1346 path = mingw_getenv("PATH");
1347 if (!path)
1348 return NULL;
f1a4dfb8 1349
e0ca1ca2
RS		 1350 while (!prog) {
1351 const char *sep = strchrnul(path, ';');
1352 int dirlen = sep - path;
1353 if (dirlen)
1354 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1355 if (!*sep)
1356 break;
1357 path = sep + 1;
1358 }
f1a4dfb8
JS		 1359
1360 return prog;
1361}
1362
2bf46a9f
MA		 1363char *mingw_locate_in_PATH(const char *cmd)
1364{
1365 return path_lookup(cmd, 0);
1366}
1367
fe21c6b2
JS		 1368static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
1369{
1370 while (*s && *s != c)
1371 s++;
1372 return s;
1373}
1374
1375/* Compare only keys */
1376static int wenvcmp(const void *a, const void *b)
1377{
1378 wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
1379 size_t p_len, q_len;
1380
1381 /* Find the keys */
1382 p_len = wcschrnul(p, L'=') - p;
1383 q_len = wcschrnul(q, L'=') - q;
f279242d 1384
fe21c6b2
JS		 1385 /* If the length differs, include the shorter key's NUL */
1386 if (p_len < q_len)
1387 p_len++;
1388 else if (p_len > q_len)
1389 p_len = q_len + 1;
1390
1391 return _wcsnicmp(p, q, p_len);
1392}
f279242d 1393
df0e998c 1394/*
fe21c6b2
JS		 1395 * Build an environment block combining the inherited environment
1396 * merged with the given list of settings.
1397 *
1398 * Values of the form "KEY=VALUE" in deltaenv override inherited values.
1399 * Values of the form "KEY" in deltaenv delete inherited values.
1400 *
1401 * Multiple entries in deltaenv for the same key are explicitly allowed.
1402 *
1403 * We return a contiguous block of UNICODE strings with a final trailing
1404 * zero word.
df0e998c 1405 */
77734da2 1406static wchar_t *make_environment_block(char **deltaenv)
7e5d7768 1407{
fe21c6b2
JS		 1408 wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
1409 size_t wlen, s, delta_size, size;
df0e998c 1410
fe21c6b2
JS		 1411 wchar_t **array = NULL;
1412 size_t alloc = 0, nr = 0, i;
df0e998c 1413
fe21c6b2
JS		 1414 size = 1; /* for extra NUL at the end */
1415
1416 /* If there is no deltaenv to apply, simply return a copy. */
1417 if (!deltaenv || !*deltaenv) {
1418 for (p = wenv; p && *p; ) {
1419 size_t s = wcslen(p) + 1;
1420 size += s;
1421 p += s;
1422 }
77734da2 1423
6e578410 1424 DUP_ARRAY(result, wenv, size);
fe21c6b2
JS		 1425 FreeEnvironmentStringsW(wenv);
1426 return result;
1427 }
77734da2 1428
fe21c6b2
JS		 1429 /*
1430 * If there is a deltaenv, let's accumulate all keys into `array`,
97fff610
JS		 1431 * sort them using the stable git_stable_qsort() and then copy,
1432 * skipping duplicate keys
fe21c6b2
JS		 1433 */
1434 for (p = wenv; p && *p; ) {
1435 ALLOC_GROW(array, nr + 1, alloc);
1436 s = wcslen(p) + 1;
1437 array[nr++] = p;
1438 p += s;
1439 size += s;
df0e998c 1440 }
fe21c6b2
JS		 1441
1442 /* (over-)assess size needed for wchar version of deltaenv */
1443 for (delta_size = 0, i = 0; deltaenv[i]; i++)
1444 delta_size += strlen(deltaenv[i]) * 2 + 1;
1445 ALLOC_ARRAY(wdeltaenv, delta_size);
1446
1447 /* convert the deltaenv, appending to array */
1448 for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
1449 ALLOC_GROW(array, nr + 1, alloc);
1450 wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
1451 array[nr++] = p;
1452 p += wlen + 1;
1453 }
df0e998c 1454
97fff610 1455 git_stable_qsort(array, nr, sizeof(*array), wenvcmp);
fe21c6b2 1456 ALLOC_ARRAY(result, size + delta_size);
df0e998c 1457
fe21c6b2
JS		 1458 for (p = result, i = 0; i < nr; i++) {
1459 /* Skip any duplicate keys; last one wins */
1460 while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
1461 i++;
77734da2 1462
fe21c6b2
JS		 1463 /* Skip "to delete" entry */
1464 if (!wcschr(array[i], L'='))
1465 continue;
77734da2 1466
fe21c6b2 1467 size = wcslen(array[i]) + 1;
552fc501 1468 COPY_ARRAY(p, array[i], size);
fe21c6b2 1469 p += size;
df0e998c 1470 }
fe21c6b2
JS		 1471 *p = L'\0';
1472
1473 free(array);
1474 free(wdeltaenv);
1475 FreeEnvironmentStringsW(wenv);
1476 return result;
7e5d7768
JS		 1477}
1478
0e218f91
JS		 1479static void do_unset_environment_variables(void)
1480{
1481 static int done;
1482 char *p = unset_environment_variables;
1483
1484 if (done || !p)
1485 return;
1486 done = 1;
1487
1488 for (;;) {
1489 char *comma = strchr(p, ',');
1490
1491 if (comma)
1492 *comma = '\0';
1493 unsetenv(p);
1494 if (!comma)
1495 break;
1496 p = comma + 1;
1497 }
1498}
1499
52de4db5
EFL		 1500struct pinfo_t {
1501 struct pinfo_t *next;
1502 pid_t pid;
1503 HANDLE proc;
657b35f4
RJ		 1504};
1505static struct pinfo_t *pinfo = NULL;
52de4db5
EFL		 1506CRITICAL_SECTION pinfo_cs;
1507
9e9da23c
JS		 1508/* Used to match and chomp off path components */
1509static inline int match_last_path_component(const char *path, size_t *len,
1510 const char *component)
1511{
1512 size_t component_len = strlen(component);
1513 if (*len < component_len + 1 ||
1514 !is_dir_sep(path[*len - component_len - 1]) ||
1515 fspathncmp(path + *len - component_len, component, component_len))
1516 return 0;
1517 *len -= component_len + 1;
1518 /* chomp off repeated dir separators */
1519 while (*len > 0 && is_dir_sep(path[*len - 1]))
1520 (*len)--;
1521 return 1;
1522}
1523
1524static int is_msys2_sh(const char *cmd)
1525{
e2ba3d6f
JS		 1526 if (!cmd)
1527 return 0;
1528
1529 if (!strcmp(cmd, "sh")) {
9e9da23c
JS		 1530 static int ret = -1;
1531 char *p;
1532
1533 if (ret >= 0)
1534 return ret;
1535
1536 p = path_lookup(cmd, 0);
1537 if (!p)
1538 ret = 0;
1539 else {
1540 size_t len = strlen(p);
1541
1542 ret = match_last_path_component(p, &len, "sh.exe") &&
1543 match_last_path_component(p, &len, "bin") &&
1544 match_last_path_component(p, &len, "usr");
1545 free(p);
1546 }
1547 return ret;
1548 }
e2ba3d6f
JS		 1549
1550 if (ends_with(cmd, "\\sh.exe")) {
1551 static char *sh;
1552
1553 if (!sh)
1554 sh = path_lookup("sh", 0);
1555
1556 return !fspathcmp(cmd, sh);
1557 }
1558
9e9da23c
JS		 1559 return 0;
1560}
1561
77734da2 1562static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1563 const char *dir,
75301f90 1564 int prepend_cmd, int fhin, int fhout, int fherr)
7e5d7768 1565{
ac33519d 1566 static int restrict_handle_inheritance = -1;
9a780a38 1567 STARTUPINFOEXW si;
7e5d7768 1568 PROCESS_INFORMATION pi;
9a780a38
JS		 1569 LPPROC_THREAD_ATTRIBUTE_LIST attr_list = NULL;
1570 HANDLE stdhandles[3];
1571 DWORD stdhandles_count = 0;
1572 SIZE_T size;
7eb2619c
KB		 1573 struct strbuf args;
1574 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1575 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
7e5d7768 1576 BOOL ret;
0e218f91 1577 HANDLE cons;
9e9da23c 1578 const char *(*quote_arg)(const char *arg) =
49f7a76d
JS		 1579 is_msys2_sh(cmd ? cmd : *argv) ?
1580 quote_arg_msys2 : quote_arg_msvc;
3efc128c 1581 const char *strace_env;
0e218f91 1582
4d0375ca
JS		 1583 /* Make sure to override previous errors, if any */
1584 errno = 0;
1585
ac33519d
JS		 1586 if (restrict_handle_inheritance < 0)
1587 restrict_handle_inheritance = core_restrict_inherited_handles;
1588 /*
1589 * The following code to restrict which handles are inherited seems
1590 * to work properly only on Windows 7 and later, so let's disable it
1591 * on Windows Vista and 2008.
1592 */
1593 if (restrict_handle_inheritance < 0)
1594 restrict_handle_inheritance = GetVersion() >> 16 >= 7601;
1595
0e218f91 1596 do_unset_environment_variables();
7e5d7768
JS		 1597
1598 /* Determine whether or not we are associated to a console */
94238859 1599 cons = CreateFileW(L"CONOUT$", GENERIC_WRITE,
7e5d7768
JS		 1600 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1601 FILE_ATTRIBUTE_NORMAL, NULL);
1602 if (cons == INVALID_HANDLE_VALUE) {
1603 /* There is no console associated with this process.
1604 * Since the child is a console process, Windows
1605 * would normally create a console window. But
1606 * since we'll be redirecting std streams, we do
1607 * not need the console.
19fb896f
AG		 1608 * It is necessary to use DETACHED_PROCESS
1609 * instead of CREATE_NO_WINDOW to make ssh
1610 * recognize that it has no console.
7e5d7768 1611 */
7eb2619c 1612 flags |= DETACHED_PROCESS;
7e5d7768
JS		 1613 } else {
1614 /* There is already a console. If we specified
19fb896f 1615 * DETACHED_PROCESS here, too, Windows would
7e5d7768 1616 * disassociate the child from the console.
19fb896f 1617 * The same is true for CREATE_NO_WINDOW.
7e5d7768
JS		 1618 * Go figure!
1619 */
7e5d7768
JS		 1620 CloseHandle(cons);
1621 }
1622 memset(&si, 0, sizeof(si));
9a780a38
JS		 1623 si.StartupInfo.cb = sizeof(si);
1624 si.StartupInfo.hStdInput = winansi_get_osfhandle(fhin);
1625 si.StartupInfo.hStdOutput = winansi_get_osfhandle(fhout);
1626 si.StartupInfo.hStdError = winansi_get_osfhandle(fherr);
1627
1628 /* The list of handles cannot contain duplicates */
1629 if (si.StartupInfo.hStdInput != INVALID_HANDLE_VALUE)
1630 stdhandles[stdhandles_count++] = si.StartupInfo.hStdInput;
1631 if (si.StartupInfo.hStdOutput != INVALID_HANDLE_VALUE &&
1632 si.StartupInfo.hStdOutput != si.StartupInfo.hStdInput)
1633 stdhandles[stdhandles_count++] = si.StartupInfo.hStdOutput;
1634 if (si.StartupInfo.hStdError != INVALID_HANDLE_VALUE &&
1635 si.StartupInfo.hStdError != si.StartupInfo.hStdInput &&
1636 si.StartupInfo.hStdError != si.StartupInfo.hStdOutput)
1637 stdhandles[stdhandles_count++] = si.StartupInfo.hStdError;
1638 if (stdhandles_count)
1639 si.StartupInfo.dwFlags |= STARTF_USESTDHANDLES;
7e5d7768 1640
eb7c7863
JS		 1641 if (*argv && !strcmp(cmd, *argv))
1642 wcmd[0] = L'\0';
1643 else if (xutftowcs_path(wcmd, cmd) < 0)
99c3c76d
KB		 1644 return -1;
1645 if (dir && xutftowcs_path(wdir, dir) < 0)
1646 return -1;
1647
7e5d7768
JS		 1648 /* concatenate argv, quoting args as we go */
1649 strbuf_init(&args, 0);
1650 if (prepend_cmd) {
1651 char *quoted = (char *)quote_arg(cmd);
1652 strbuf_addstr(&args, quoted);
1653 if (quoted != cmd)
1654 free(quoted);
1655 }
1656 for (; *argv; argv++) {
1657 char *quoted = (char *)quote_arg(*argv);
1658 if (*args.buf)
1659 strbuf_addch(&args, ' ');
1660 strbuf_addstr(&args, quoted);
1661 if (quoted != *argv)
1662 free(quoted);
1663 }
1664
3efc128c
JS		 1665 strace_env = getenv("GIT_STRACE_COMMANDS");
1666 if (strace_env) {
1667 char *p = path_lookup("strace.exe", 1);
1668 if (!p)
1669 return error("strace not found!");
1670 if (xutftowcs_path(wcmd, p) < 0) {
1671 free(p);
1672 return -1;
1673 }
1674 free(p);
1675 if (!strcmp("1", strace_env) ||
1676 !strcasecmp("yes", strace_env) ||
1677 !strcasecmp("true", strace_env))
1678 strbuf_insert(&args, 0, "strace ", 7);
1679 else {
1680 const char *quoted = quote_arg(strace_env);
1681 struct strbuf buf = STRBUF_INIT;
1682 strbuf_addf(&buf, "strace -o %s ", quoted);
1683 if (quoted != strace_env)
1684 free((char *)quoted);
1685 strbuf_insert(&args, 0, buf.buf, buf.len);
1686 strbuf_release(&buf);
1687 }
1688 }
1689
8d5b3325 1690 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
99c3c76d
KB		 1691 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1692 strbuf_release(&args);
1693
77734da2 1694 wenvblk = make_environment_block(deltaenv);
7e5d7768
JS		 1695
1696 memset(&pi, 0, sizeof(pi));
9a780a38
JS		 1697 if (restrict_handle_inheritance && stdhandles_count &&
1698 (InitializeProcThreadAttributeList(NULL, 1, 0, &size) ||
1699 GetLastError() == ERROR_INSUFFICIENT_BUFFER) &&
1700 (attr_list = (LPPROC_THREAD_ATTRIBUTE_LIST)
1701 (HeapAlloc(GetProcessHeap(), 0, size))) &&
1702 InitializeProcThreadAttributeList(attr_list, 1, 0, &size) &&
1703 UpdateProcThreadAttribute(attr_list, 0,
1704 PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
1705 stdhandles,
1706 stdhandles_count * sizeof(HANDLE),
1707 NULL, NULL)) {
1708 si.lpAttributeList = attr_list;
1709 flags |= EXTENDED_STARTUPINFO_PRESENT;
1710 }
1711
1712 ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
1713 stdhandles_count ? TRUE : FALSE,
1714 flags, wenvblk, dir ? wdir : NULL,
1715 &si.StartupInfo, &pi);
1716
1717 /*
1718 * On Windows 2008 R2, it seems that specifying certain types of handles
1719 * (such as FILE_TYPE_CHAR or FILE_TYPE_PIPE) will always produce an
1720 * error. Rather than playing finicky and fragile games, let's just try
1721 * to detect this situation and simply try again without restricting any
1722 * handle inheritance. This is still better than failing to create
1723 * processes.
1724 */
1725 if (!ret && restrict_handle_inheritance && stdhandles_count) {
1726 DWORD err = GetLastError();
1727 struct strbuf buf = STRBUF_INIT;
1728
1729 if (err != ERROR_NO_SYSTEM_RESOURCES &&
1730 /*
1731 * On Windows 7 and earlier, handles on pipes and character
1732 * devices are inherited automatically, and cannot be
1733 * specified in the thread handle list. Rather than trying
1734 * to catch each and every corner case (and running the
1735 * chance of *still* forgetting a few), let's just fall
1736 * back to creating the process without trying to limit the
1737 * handle inheritance.
1738 */
1739 !(err == ERROR_INVALID_PARAMETER &&
1740 GetVersion() >> 16 < 9200) &&
1741 !getenv("SUPPRESS_HANDLE_INHERITANCE_WARNING")) {
1742 DWORD fl = 0;
1743 int i;
1744
1745 setenv("SUPPRESS_HANDLE_INHERITANCE_WARNING", "1", 1);
1746
1747 for (i = 0; i < stdhandles_count; i++) {
1748 HANDLE h = stdhandles[i];
1749 strbuf_addf(&buf, "handle #%d: %p (type %lx, "
1750 "handle info (%d) %lx\n", i, h,
1751 GetFileType(h),
1752 GetHandleInformation(h, &fl),
1753 fl);
1754 }
1755 strbuf_addstr(&buf, "\nThis is a bug; please report it "
1756 "at\nhttps://github.com/git-for-windows/"
1757 "git/issues/new\n\n"
1758 "To suppress this warning, please set "
1759 "the environment variable\n\n"
1760 "\tSUPPRESS_HANDLE_INHERITANCE_WARNING=1"
1761 "\n");
1762 }
1763 restrict_handle_inheritance = 0;
1764 flags &= ~EXTENDED_STARTUPINFO_PRESENT;
1765 ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
1766 TRUE, flags, wenvblk, dir ? wdir : NULL,
1767 &si.StartupInfo, &pi);
4d0375ca 1768 if (!ret)
9a780a38 1769 errno = err_win_to_posix(GetLastError());
4d0375ca 1770 if (ret && buf.len) {
9a780a38
JS		 1771 warning("failed to restrict file handles (%ld)\n\n%s",
1772 err, buf.buf);
1773 }
1774 strbuf_release(&buf);
1775 } else if (!ret)
1776 errno = err_win_to_posix(GetLastError());
1777
1778 if (si.lpAttributeList)
1779 DeleteProcThreadAttributeList(si.lpAttributeList);
1780 if (attr_list)
1781 HeapFree(GetProcessHeap(), 0, attr_list);
7e5d7768 1782
7eb2619c 1783 free(wenvblk);
99c3c76d 1784 free(wargs);
7e5d7768 1785
9a780a38 1786 if (!ret)
7e5d7768 1787 return -1;
9a780a38 1788
7e5d7768 1789 CloseHandle(pi.hThread);
52de4db5
EFL		 1790
1791 /*
1792 * The process ID is the human-readable identifier of the process
1793 * that we want to present in log and error messages. The handle
1794 * is not useful for this purpose. But we cannot close it, either,
1795 * because it is not possible to turn a process ID into a process
1796 * handle after the process terminated.
1797 * Keep the handle in a list for waitpid.
1798 */
1799 EnterCriticalSection(&pinfo_cs);
1800 {
1801 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1802 info->pid = pi.dwProcessId;
1803 info->proc = pi.hProcess;
1804 info->next = pinfo;
1805 pinfo = info;
1806 }
1807 LeaveCriticalSection(&pinfo_cs);
1808
1809 return (pid_t)pi.dwProcessId;
7e5d7768
JS		 1810}
1811
3e66e47b 1812static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
75301f90 1813{
77734da2 1814 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
75301f90
JS		 1815}
1816
77734da2 1817pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1818 const char *dir,
75301f90 1819 int fhin, int fhout, int fherr)
7e5d7768
JS		 1820{
1821 pid_t pid;
e0ca1ca2 1822 char *prog = path_lookup(cmd, 0);
7e5d7768
JS		 1823
1824 if (!prog) {
1825 errno = ENOENT;
1826 pid = -1;
1827 }
1828 else {
1829 const char *interpr = parse_interpreter(prog);
1830
1831 if (interpr) {
1832 const char *argv0 = argv[0];
e0ca1ca2 1833 char *iprog = path_lookup(interpr, 1);
7e5d7768
JS		 1834 argv[0] = prog;
1835 if (!iprog) {
1836 errno = ENOENT;
1837 pid = -1;
1838 }
1839 else {
77734da2 1840 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
75301f90 1841 fhin, fhout, fherr);
7e5d7768
JS		 1842 free(iprog);
1843 }
1844 argv[0] = argv0;
1845 }
1846 else
77734da2 1847 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
75301f90 1848 fhin, fhout, fherr);
7e5d7768
JS		 1849 free(prog);
1850 }
7e5d7768
JS		 1851 return pid;
1852}
1853
3e66e47b 1854static int try_shell_exec(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1855{
1856 const char *interpr = parse_interpreter(cmd);
f1a4dfb8
JS		 1857 char *prog;
1858 int pid = 0;
1859
1860 if (!interpr)
1861 return 0;
e0ca1ca2 1862 prog = path_lookup(interpr, 1);
f1a4dfb8 1863 if (prog) {
ee4512ed 1864 int exec_id;
f1a4dfb8 1865 int argc = 0;
12fb9bd8 1866 char **argv2;
f1a4dfb8 1867 while (argv[argc]) argc++;
b32fa95f 1868 ALLOC_ARRAY(argv2, argc + 1);
7e5d7768 1869 argv2[0] = (char *)cmd; /* full path to the script file */
51bd6be3 1870 COPY_ARRAY(&argv2[1], &argv[1], argc);
09884f35
RS		 1871 exec_id = trace2_exec(prog, (const char **)argv2);
1872 pid = mingw_spawnv(prog, (const char **)argv2, 1);
f1a4dfb8
JS		 1873 if (pid >= 0) {
1874 int status;
1875 if (waitpid(pid, &status, 0) < 0)
1876 status = 255;
ee4512ed 1877 trace2_exec_result(exec_id, status);
f1a4dfb8
JS		 1878 exit(status);
1879 }
ee4512ed 1880 trace2_exec_result(exec_id, -1);
f1a4dfb8
JS		 1881 pid = 1; /* indicate that we tried but failed */
1882 free(prog);
1883 free(argv2);
1884 }
f1a4dfb8
JS		 1885 return pid;
1886}
1887
3e66e47b 1888int mingw_execv(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1889{
1890 /* check if git_command is a shell script */
3e66e47b 1891 if (!try_shell_exec(cmd, argv)) {
f1a4dfb8 1892 int pid, status;
ee4512ed 1893 int exec_id;
f1a4dfb8 1894
ee4512ed 1895 exec_id = trace2_exec(cmd, (const char **)argv);
3e66e47b 1896 pid = mingw_spawnv(cmd, (const char **)argv, 0);
ee4512ed
JH		 1897 if (pid < 0) {
1898 trace2_exec_result(exec_id, -1);
570f1e6e 1899 return -1;
ee4512ed 1900 }
f1a4dfb8
JS		 1901 if (waitpid(pid, &status, 0) < 0)
1902 status = 255;
ee4512ed 1903 trace2_exec_result(exec_id, status);
f1a4dfb8
JS		 1904 exit(status);
1905 }
570f1e6e 1906 return -1;
f1a4dfb8
JS		 1907}
1908
1696d723 1909int mingw_execvp(const char *cmd, char *const *argv)
f1a4dfb8 1910{
e0ca1ca2 1911 char *prog = path_lookup(cmd, 0);
f1a4dfb8
JS		 1912
1913 if (prog) {
3e66e47b 1914 mingw_execv(prog, argv);
f1a4dfb8
JS		 1915 free(prog);
1916 } else
1917 errno = ENOENT;
1918
1696d723 1919 return -1;
f1a4dfb8
JS		 1920}
1921
82fc07b7
EFL		 1922int mingw_kill(pid_t pid, int sig)
1923{
1924 if (pid > 0 && sig == SIGTERM) {
1925 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1926
1927 if (TerminateProcess(h, -1)) {
1928 CloseHandle(h);
1929 return 0;
1930 }
1931
1932 errno = err_win_to_posix(GetLastError());
1933 CloseHandle(h);
1934 return -1;
64a99eb4
NTND		 1935 } else if (pid > 0 && sig == 0) {
1936 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1937 if (h) {
1938 CloseHandle(h);
1939 return 0;
1940 }
82fc07b7
EFL		 1941 }
1942
1943 errno = EINVAL;
1944 return -1;
1945}
1946
343ff06d 1947/*
fe21c6b2
JS		 1948 * UTF-8 versions of getenv(), putenv() and unsetenv().
1949 * Internally, they use the CRT's stock UNICODE routines
1950 * to avoid data loss.
343ff06d 1951 */
fe21c6b2 1952char *mingw_getenv(const char *name)
343ff06d 1953{
ca1b4116 1954#define GETENV_MAX_RETAIN 64
fe21c6b2
JS		 1955 static char *values[GETENV_MAX_RETAIN];
1956 static int value_counter;
1957 int len_key, len_value;
1958 wchar_t *w_key;
1959 char *value;
1960 wchar_t w_value[32768];
343ff06d 1961
fe21c6b2
JS		 1962 if (!name || !*name)
1963 return NULL;
ba26f296 1964
fe21c6b2
JS		 1965 len_key = strlen(name) + 1;
1966 /* We cannot use xcalloc() here because that uses getenv() itself */
1967 w_key = calloc(len_key, sizeof(wchar_t));
1968 if (!w_key)
1969 die("Out of memory, (tried to allocate %u wchar_t's)", len_key);
1970 xutftowcs(w_key, name, len_key);
61d1d92a
JS		 1971 /* GetEnvironmentVariableW() only sets the last error upon failure */
1972 SetLastError(ERROR_SUCCESS);
fe21c6b2
JS		 1973 len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
1974 if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
1975 free(w_key);
1976 return NULL;
ba26f296 1977 }
fe21c6b2
JS		 1978 free(w_key);
1979
1980 len_value = len_value * 3 + 1;
1981 /* We cannot use xcalloc() here because that uses getenv() itself */
1982 value = calloc(len_value, sizeof(char));
1983 if (!value)
1984 die("Out of memory, (tried to allocate %u bytes)", len_value);
1985 xwcstoutf(value, w_value, len_value);
1986
1987 /*
1988 * We return `value` which is an allocated value and the caller is NOT
1989 * expecting to have to free it, so we keep a round-robin array,
1990 * invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
1991 */
1992 free(values[value_counter]);
1993 values[value_counter++] = value;
1994 if (value_counter >= ARRAY_SIZE(values))
1995 value_counter = 0;
1996
1997 return value;
ba26f296
JS		 1998}
1999
fe21c6b2 2000int mingw_putenv(const char *namevalue)
ba26f296 2001{
fe21c6b2
JS		 2002 int size;
2003 wchar_t *wide, *equal;
2004 BOOL result;
ba26f296 2005
fe21c6b2
JS		 2006 if (!namevalue || !*namevalue)
2007 return 0;
ba26f296 2008
fe21c6b2
JS		 2009 size = strlen(namevalue) * 2 + 1;
2010 wide = calloc(size, sizeof(wchar_t));
2011 if (!wide)
2012 die("Out of memory, (tried to allocate %u wchar_t's)", size);
2013 xutftowcs(wide, namevalue, size);
2014 equal = wcschr(wide, L'=');
2015 if (!equal)
2016 result = SetEnvironmentVariableW(wide, NULL);
2017 else {
2018 *equal = L'\0';
2019 result = SetEnvironmentVariableW(wide, equal + 1);
ba26f296 2020 }
fe21c6b2 2021 free(wide);
2affea41 2022
fe21c6b2
JS		 2023 if (!result)
2024 errno = err_win_to_posix(GetLastError());
df599e96 2025
fe21c6b2 2026 return result ? 0 : -1;
06bc4b79
JS		 2027}
2028
b7cc9f82 2029static void ensure_socket_initialization(void)
746fb857
JS		 2030{
2031 WSADATA wsa;
b7cc9f82
MS		 2032 static int initialized = 0;
2033
2034 if (initialized)
2035 return;
746fb857
JS		 2036
2037 if (WSAStartup(MAKEWORD(2,2), &wsa))
2038 die("unable to initialize winsock subsystem, error %d",
2039 WSAGetLastError());
fe3b2b7b 2040
b9f0193b 2041 atexit((void(*)(void)) WSACleanup);
b7cc9f82
MS		 2042 initialized = 1;
2043}
2044
13d24b01
PT		 2045#undef gethostname
2046int mingw_gethostname(char *name, int namelen)
2047{
2048 ensure_socket_initialization();
2049 return gethostname(name, namelen);
2050}
2051
b7cc9f82
MS		 2052#undef gethostbyname
2053struct hostent *mingw_gethostbyname(const char *host)
2054{
2055 ensure_socket_initialization();
746fb857
JS		 2056 return gethostbyname(host);
2057}
2058
b9f0193b 2059#undef getaddrinfo
fe3b2b7b
MS		 2060int mingw_getaddrinfo(const char *node, const char *service,
2061 const struct addrinfo *hints, struct addrinfo **res)
2062{
2063 ensure_socket_initialization();
b9f0193b 2064 return getaddrinfo(node, service, hints, res);
fe3b2b7b
MS		 2065}
2066
746fb857
JS		 2067int mingw_socket(int domain, int type, int protocol)
2068{
2069 int sockfd;
772991af
MP		 2070 SOCKET s;
2071
2072 ensure_socket_initialization();
2073 s = WSASocket(domain, type, protocol, NULL, 0, 0);
746fb857
JS		 2074 if (s == INVALID_SOCKET) {
2075 /*
2076 * WSAGetLastError() values are regular BSD error codes
2077 * biased by WSABASEERR.
2078 * However, strerror() does not know about networking
2079 * specific errors, which are values beginning at 38 or so.
2080 * Therefore, we choose to leave the biased error code
2081 * in errno so that _if_ someone looks up the code somewhere,
2082 * then it is at least the number that are usually listed.
2083 */
2084 errno = WSAGetLastError();
2085 return -1;
2086 }
2087 /* convert into a file descriptor */
2088 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
2089 closesocket(s);
2090 return error("unable to make a socket file descriptor: %s",
2091 strerror(errno));
2092 }
2093 return sockfd;
2094}
2095
2096#undef connect
2097int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
2098{
2099 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2100 return connect(s, sa, sz);
2101}
2102
772991af
MP		 2103#undef bind
2104int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
2105{
2106 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2107 return bind(s, sa, sz);
2108}
2109
2110#undef setsockopt
2111int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
2112{
2113 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2114 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
2115}
2116
a7941795
JS		 2117#undef shutdown
2118int mingw_shutdown(int sockfd, int how)
2119{
2120 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2121 return shutdown(s, how);
2122}
2123
772991af
MP		 2124#undef listen
2125int mingw_listen(int sockfd, int backlog)
2126{
2127 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
2128 return listen(s, backlog);
2129}
2130
2131#undef accept
2132int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
2133{
2134 int sockfd2;
2135
2136 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
2137 SOCKET s2 = accept(s1, sa, sz);
2138
2139 /* convert into a file descriptor */
2140 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
2141 int err = errno;
2142 closesocket(s2);
2143 return error("unable to make a socket file descriptor: %s",
2144 strerror(err));
2145 }
2146 return sockfd2;
2147}
2148
ea9e98c3
JS		 2149#undef rename
2150int mingw_rename(const char *pold, const char *pnew)
2151{
6ac6f878
JS		 2152 DWORD attrs, gle;
2153 int tries = 0;
85faec9d
KB		 2154 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
2155 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
2156 return -1;
632f7017 2157
ea9e98c3
JS		 2158 /*
2159 * Try native rename() first to get errno right.
2160 * It is based on MoveFile(), which cannot overwrite existing files.
2161 */
85faec9d 2162 if (!_wrename(wpold, wpnew))
ea9e98c3
JS		 2163 return 0;
2164 if (errno != EEXIST)
2165 return -1;
6ac6f878 2166repeat:
85faec9d 2167 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
ea9e98c3
JS		 2168 return 0;
2169 /* TODO: translate more errors */
6ac6f878
JS		 2170 gle = GetLastError();
2171 if (gle == ERROR_ACCESS_DENIED &&
85faec9d 2172 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
632f7017 2173 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
4426fb51 2174 DWORD attrsold = GetFileAttributesW(wpold);
2175 if (attrsold == INVALID_FILE_ATTRIBUTES ||
2176 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
2177 errno = EISDIR;
2178 else if (!_wrmdir(wpnew))
2179 goto repeat;
ea9e98c3
JS		 2180 return -1;
2181 }
632f7017 2182 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
85faec9d
KB		 2183 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
2184 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
632f7017 2185 return 0;
6ac6f878 2186 gle = GetLastError();
632f7017 2187 /* revert file attributes on failure */
85faec9d 2188 SetFileAttributesW(wpnew, attrs);
632f7017 2189 }
ea9e98c3 2190 }
6ac6f878
JS		 2191 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
2192 /*
2193 * We assume that some other process had the source or
2194 * destination file open at the wrong moment and retry.
2195 * In order to give the other process a higher chance to
2196 * complete its operation, we give up our time slice now.
2197 * If we have to retry again, we do sleep a bit.
2198 */
2199 Sleep(delay[tries]);
2200 tries++;
2201 goto repeat;
2202 }
c9b78400
HV		 2203 if (gle == ERROR_ACCESS_DENIED &&
2204 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
2205 "Should I try again?", pold, pnew))
2206 goto repeat;
2207
ea9e98c3
JS		 2208 errno = EACCES;
2209 return -1;
2210}
2211
b1b95204
RJ		 2212/*
2213 * Note that this doesn't return the actual pagesize, but
2214 * the allocation granularity. If future Windows specific git code
2215 * needs the real getpagesize function, we need to find another solution.
2216 */
2217int mingw_getpagesize(void)
2218{
2219 SYSTEM_INFO si;
2220 GetSystemInfo(&si);
2221 return si.dwAllocationGranularity;
2222}
2223
564be791
JS		 2224/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
2225enum EXTENDED_NAME_FORMAT {
2226 NameDisplay = 3,
2227 NameUserPrincipal = 8
2228};
2229
2230static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
2231{
4a9b2049 2232 DECLARE_PROC_ADDR(secur32.dll, BOOL, SEC_ENTRY, GetUserNameExW,
564be791
JS		 2233 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
2234 static wchar_t wbuffer[1024];
2235 DWORD len;
2236
2237 if (!INIT_PROC_ADDR(GetUserNameExW))
2238 return NULL;
2239
2240 len = ARRAY_SIZE(wbuffer);
2241 if (GetUserNameExW(type, wbuffer, &len)) {
2242 char *converted = xmalloc((len *= 3));
2243 if (xwcstoutf(converted, wbuffer, len) >= 0)
2244 return converted;
2245 free(converted);
2246 }
2247
2248 return NULL;
2249}
2250
501afcb8
JS		 2251char *mingw_query_user_email(void)
2252{
2253 return get_extended_user_info(NameUserPrincipal);
2254}
2255
f4626df5
JS		 2256struct passwd *getpwuid(int uid)
2257{
55b6513e 2258 static unsigned initialized;
f7597aca 2259 static char user_name[100];
55b6513e 2260 static struct passwd *p;
39a98e9b 2261 wchar_t buf[100];
55b6513e 2262 DWORD len;
f7597aca 2263
55b6513e
JS		 2264 if (initialized)
2265 return p;
f7597aca 2266
697bdd22 2267 len = ARRAY_SIZE(buf);
39a98e9b
JS		 2268 if (!GetUserNameW(buf, &len)) {
2269 initialized = 1;
2270 return NULL;
2271 }
2272
2273 if (xwcstoutf(user_name, buf, sizeof(user_name)) < 0) {
55b6513e 2274 initialized = 1;
f7597aca 2275 return NULL;
55b6513e
JS		 2276 }
2277
2278 p = xmalloc(sizeof(*p));
2279 p->pw_name = user_name;
564be791
JS		 2280 p->pw_gecos = get_extended_user_info(NameDisplay);
2281 if (!p->pw_gecos)
2282 p->pw_gecos = "unknown";
55b6513e
JS		 2283 p->pw_dir = NULL;
2284
2285 initialized = 1;
2286 return p;
f4626df5
JS		 2287}
2288
6072fc31
JS		 2289static HANDLE timer_event;
2290static HANDLE timer_thread;
2291static int timer_interval;
2292static int one_shot;
176478a8 2293static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
6072fc31
JS		 2294
2295/* The timer works like this:
2296 * The thread, ticktack(), is a trivial routine that most of the time
2297 * only waits to receive the signal to terminate. The main thread tells
2298 * the thread to terminate by setting the timer_event to the signalled
2299 * state.
2300 * But ticktack() interrupts the wait state after the timer's interval
2301 * length to call the signal handler.
2302 */
2303
d7fa500f 2304static unsigned __stdcall ticktack(void *dummy)
6072fc31
JS		 2305{
2306 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
176478a8 2307 mingw_raise(SIGALRM);
6072fc31
JS		 2308 if (one_shot)
2309 break;
2310 }
2311 return 0;
2312}
2313
2314static int start_timer_thread(void)
2315{
2316 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
2317 if (timer_event) {
2318 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
2319 if (!timer_thread )
2320 return errno = ENOMEM,
2321 error("cannot start timer thread");
2322 } else
2323 return errno = ENOMEM,
2324 error("cannot allocate resources for timer");
2325 return 0;
2326}
2327
2328static void stop_timer_thread(void)
2329{
2330 if (timer_event)
2331 SetEvent(timer_event); /* tell thread to terminate */
2332 if (timer_thread) {
72d63b2f 2333 int rc = WaitForSingleObject(timer_thread, 10000);
6072fc31
JS		 2334 if (rc == WAIT_TIMEOUT)
2335 error("timer thread did not terminate timely");
2336 else if (rc != WAIT_OBJECT_0)
2337 error("waiting for timer thread failed: %lu",
2338 GetLastError());
2339 CloseHandle(timer_thread);
2340 }
2341 if (timer_event)
2342 CloseHandle(timer_event);
2343 timer_event = NULL;
2344 timer_thread = NULL;
2345}
2346
2347static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
2348{
2349 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
2350}
2351
f4626df5
JS		 2352int setitimer(int type, struct itimerval *in, struct itimerval *out)
2353{
6072fc31
JS		 2354 static const struct timeval zero;
2355 static int atexit_done;
2356
afe8a907 2357 if (out)
6072fc31
JS		 2358 return errno = EINVAL,
2359 error("setitimer param 3 != NULL not implemented");
2360 if (!is_timeval_eq(&in->it_interval, &zero) &&
2361 !is_timeval_eq(&in->it_interval, &in->it_value))
2362 return errno = EINVAL,
2363 error("setitimer: it_interval must be zero or eq it_value");
2364
2365 if (timer_thread)
2366 stop_timer_thread();
2367
2368 if (is_timeval_eq(&in->it_value, &zero) &&
2369 is_timeval_eq(&in->it_interval, &zero))
2370 return 0;
2371
2372 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
2373 one_shot = is_timeval_eq(&in->it_interval, &zero);
2374 if (!atexit_done) {
2375 atexit(stop_timer_thread);
2376 atexit_done = 1;
2377 }
2378 return start_timer_thread();
f4626df5
JS		 2379}
2380
2381int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2382{
6072fc31
JS		 2383 if (sig != SIGALRM)
2384 return errno = EINVAL,
2385 error("sigaction only implemented for SIGALRM");
afe8a907 2386 if (out)
6072fc31
JS		 2387 return errno = EINVAL,
2388 error("sigaction: param 3 != NULL not implemented");
2389
2390 timer_fn = in->sa_handler;
2391 return 0;
2392}
2393
2394#undef signal
2395sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2396{
a4540658 2397 sig_handler_t old;
176478a8
EFL		 2398
2399 switch (sig) {
2400 case SIGALRM:
a4540658 2401 old = timer_fn;
176478a8
EFL		 2402 timer_fn = handler;
2403 break;
2404
2405 case SIGINT:
a4540658 2406 old = sigint_fn;
176478a8
EFL		 2407 sigint_fn = handler;
2408 break;
2409
2410 default:
6072fc31 2411 return signal(sig, handler);
176478a8
EFL		 2412 }
2413
6072fc31 2414 return old;
f4626df5 2415}
4804aabc 2416
176478a8
EFL		 2417#undef raise
2418int mingw_raise(int sig)
2419{
2420 switch (sig) {
2421 case SIGALRM:
2422 if (timer_fn == SIG_DFL) {
2423 if (isatty(STDERR_FILENO))
2424 fputs("Alarm clock\n", stderr);
2425 exit(128 + SIGALRM);
2426 } else if (timer_fn != SIG_IGN)
2427 timer_fn(SIGALRM);
2428 return 0;
2429
2430 case SIGINT:
2431 if (sigint_fn == SIG_DFL)
2432 exit(128 + SIGINT);
2433 else if (sigint_fn != SIG_IGN)
2434 sigint_fn(SIGINT);
2435 return 0;
2436
446df603
JH		 2437#if defined(_MSC_VER)
2438 case SIGILL:
2439 case SIGFPE:
2440 case SIGSEGV:
2441 case SIGTERM:
2442 case SIGBREAK:
2443 case SIGABRT:
2444 case SIGABRT_COMPAT:
2445 /*
2446 * The <signal.h> header in the MS C Runtime defines 8 signals
2447 * as being supported on the platform. Anything else causes an
2448 * "Invalid signal or error" (which in DEBUG builds causes the
2449 * Abort/Retry/Ignore dialog). We by-pass the CRT for things we
2450 * already know will fail.
2451 */
2452 return raise(sig);
2453 default:
2454 errno = EINVAL;
2455 return -1;
2456
2457#else
2458
176478a8
EFL		 2459 default:
2460 return raise(sig);
446df603
JH		 2461
2462#endif
2463
176478a8
EFL		 2464 }
2465}
2466
7be401e0
PK		 2467int link(const char *oldpath, const char *newpath)
2468{
85faec9d
KB		 2469 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2470 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2471 xutftowcs_path(wnewpath, newpath) < 0)
2472 return -1;
2473
1e1a876b 2474 if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
7be401e0
PK		 2475 errno = err_win_to_posix(GetLastError());
2476 return -1;
2477 }
2478 return 0;
2479}
0dbbbc1e 2480
956d86d1 2481pid_t waitpid(pid_t pid, int *status, int options)
52de4db5
EFL		 2482{
2483 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2484 FALSE, pid);
2485 if (!h) {
2486 errno = ECHILD;
2487 return -1;
2488 }
2489
ef7108ca
EFL		 2490 if (pid > 0 && options & WNOHANG) {
2491 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2492 CloseHandle(h);
2493 return 0;
2494 }
2495 options &= ~WNOHANG;
2496 }
2497
52de4db5
EFL		 2498 if (options == 0) {
2499 struct pinfo_t **ppinfo;
2500 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2501 CloseHandle(h);
2502 return 0;
2503 }
2504
2505 if (status)
2506 GetExitCodeProcess(h, (LPDWORD)status);
2507
2508 EnterCriticalSection(&pinfo_cs);
2509
2510 ppinfo = &pinfo;
2511 while (*ppinfo) {
2512 struct pinfo_t *info = *ppinfo;
2513 if (info->pid == pid) {
2514 CloseHandle(info->proc);
2515 *ppinfo = info->next;
2516 free(info);
2517 break;
2518 }
2519 ppinfo = &info->next;
2520 }
2521
2522 LeaveCriticalSection(&pinfo_cs);
2523
2524 CloseHandle(h);
2525 return pid;
2526 }
2527 CloseHandle(h);
2528
2529 errno = EINVAL;
2530 return -1;
2531}
c2369bdf 2532
1c950a59
KB		 2533int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2534{
2535 int upos = 0, wpos = 0;
2536 const unsigned char *utf = (const unsigned char*) utfs;
2537 if (!utf || !wcs || wcslen < 1) {
2538 errno = EINVAL;
2539 return -1;
2540 }
2541 /* reserve space for \0 */
2542 wcslen--;
2543 if (utflen < 0)
2544 utflen = INT_MAX;
2545
2546 while (upos < utflen) {
2547 int c = utf[upos++] & 0xff;
2548 if (utflen == INT_MAX && c == 0)
2549 break;
2550
2551 if (wpos >= wcslen) {
2552 wcs[wpos] = 0;
2553 errno = ERANGE;
2554 return -1;
2555 }
2556
2557 if (c < 0x80) {
2558 /* ASCII */
2559 wcs[wpos++] = c;
2560 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2561 (utf[upos] & 0xc0) == 0x80) {
2562 /* 2-byte utf-8 */
2563 c = ((c & 0x1f) << 6);
2564 c |= (utf[upos++] & 0x3f);
2565 wcs[wpos++] = c;
2566 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2567 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2568 (utf[upos] & 0xc0) == 0x80 &&
2569 (utf[upos + 1] & 0xc0) == 0x80) {
2570 /* 3-byte utf-8 */
2571 c = ((c & 0x0f) << 12);
2572 c |= ((utf[upos++] & 0x3f) << 6);
2573 c |= (utf[upos++] & 0x3f);
2574 wcs[wpos++] = c;
2575 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2576 wpos + 1 < wcslen &&
2577 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2578 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2579 (utf[upos] & 0xc0) == 0x80 &&
2580 (utf[upos + 1] & 0xc0) == 0x80 &&
2581 (utf[upos + 2] & 0xc0) == 0x80) {
2582 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2583 c = ((c & 0x07) << 18);
2584 c |= ((utf[upos++] & 0x3f) << 12);
2585 c |= ((utf[upos++] & 0x3f) << 6);
2586 c |= (utf[upos++] & 0x3f);
2587 c -= 0x10000;
2588 wcs[wpos++] = 0xd800 | (c >> 10);
2589 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2590 } else if (c >= 0xa0) {
2591 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2592 wcs[wpos++] = c;
2593 } else {
2594 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2595 static const char *hex = "0123456789abcdef";
2596 wcs[wpos++] = hex[c >> 4];
2597 if (wpos < wcslen)
2598 wcs[wpos++] = hex[c & 0x0f];
2599 }
2600 }
2601 wcs[wpos] = 0;
2602 return wpos;
2603}
2604
2605int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2606{
2607 if (!wcs || !utf || utflen < 1) {
2608 errno = EINVAL;
2609 return -1;
2610 }
2611 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2612 if (utflen)
2613 return utflen - 1;
2614 errno = ERANGE;
2615 return -1;
2616}
2617
0767172b 2618static void setup_windows_environment(void)
02e6edc0 2619{
1fc7bf79
JS		 2620 char *tmp = getenv("TMPDIR");
2621
02e6edc0 2622 /* on Windows it is TMP and TEMP */
1fc7bf79
JS		 2623 if (!tmp) {
2624 if (!(tmp = getenv("TMP")))
02e6edc0 2625 tmp = getenv("TEMP");
1fc7bf79 2626 if (tmp) {
02e6edc0 2627 setenv("TMPDIR", tmp, 1);
1fc7bf79
JS		 2628 tmp = getenv("TMPDIR");
2629 }
2630 }
2631
2632 if (tmp) {
2633 /*
2634 * Convert all dir separators to forward slashes,
2635 * to help shell commands called from the Git
2636 * executable (by not mistaking the dir separators
2637 * for escape characters).
2638 */
8e9b2080 2639 convert_slashes(tmp);
02e6edc0
KB		 2640 }
2641
2642 /* simulate TERM to enable auto-color (see color.c) */
2643 if (!getenv("TERM"))
2644 setenv("TERM", "cygwin", 1);
e12a9556
KB		 2645
2646 /* calculate HOME if not set */
2647 if (!getenv("HOME")) {
2648 /*
2649 * try $HOMEDRIVE$HOMEPATH - the home share may be a network
2650 * location, thus also check if the path exists (i.e. is not
2651 * disconnected)
2652 */
2653 if ((tmp = getenv("HOMEDRIVE"))) {
2654 struct strbuf buf = STRBUF_INIT;
2655 strbuf_addstr(&buf, tmp);
2656 if ((tmp = getenv("HOMEPATH"))) {
2657 strbuf_addstr(&buf, tmp);
2658 if (is_directory(buf.buf))
2659 setenv("HOME", buf.buf, 1);
2660 else
2661 tmp = NULL; /* use $USERPROFILE */
2662 }
2663 strbuf_release(&buf);
2664 }
2665 /* use $USERPROFILE if the home share is not available */
2666 if (!tmp && (tmp = getenv("USERPROFILE")))
2667 setenv("HOME", tmp, 1);
2668 }
02e6edc0
KB		 2669}
2670
bdc77d1d
JS		 2671static PSID get_current_user_sid(void)
2672{
2673 HANDLE token;
2674 DWORD len = 0;
2675 PSID result = NULL;
2676
2677 if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token))
2678 return NULL;
2679
2680 if (!GetTokenInformation(token, TokenUser, NULL, 0, &len)) {
2681 TOKEN_USER *info = xmalloc((size_t)len);
2682 if (GetTokenInformation(token, TokenUser, info, len, &len)) {
2683 len = GetLengthSid(info->User.Sid);
2684 result = xmalloc(len);
2685 if (!CopySid(len, result, info->User.Sid)) {
2686 error(_("failed to copy SID (%ld)"),
2687 GetLastError());
2688 FREE_AND_NULL(result);
2689 }
2690 }
2691 FREE_AND_NULL(info);
2692 }
2693 CloseHandle(token);
2694
2695 return result;
2696}
2697
f755e092
SK		 2698static BOOL user_sid_to_user_name(PSID sid, LPSTR *str)
2699{
2700 SID_NAME_USE pe_use;
2701 DWORD len_user = 0, len_domain = 0;
2702 BOOL translate_sid_to_user;
2703
2704 /*
2705 * returns only FALSE, because the string pointers are NULL
2706 */
2707 LookupAccountSidA(NULL, sid, NULL, &len_user, NULL, &len_domain,
2708 &pe_use);
2709 /*
2710 * Alloc needed space of the strings
2711 */
2712 ALLOC_ARRAY((*str), (size_t)len_domain + (size_t)len_user);
2713 translate_sid_to_user = LookupAccountSidA(NULL, sid,
2714 (*str) + len_domain, &len_user, *str, &len_domain, &pe_use);
2715 if (!translate_sid_to_user)
2716 FREE_AND_NULL(*str);
2717 else
2718 (*str)[len_domain] = '/';
2719 return translate_sid_to_user;
2720}
2721
7c83470e
JS		 2722static int acls_supported(const char *path)
2723{
2724 size_t offset = offset_1st_component(path);
2725 WCHAR wroot[MAX_PATH];
2726 DWORD file_system_flags;
2727
2728 if (offset &&
2729 xutftowcsn(wroot, path, MAX_PATH, offset) > 0 &&
2730 GetVolumeInformationW(wroot, NULL, 0, NULL, NULL,
2731 &file_system_flags, NULL, 0))
2732 return !!(file_system_flags & FILE_PERSISTENT_ACLS);
2733
2734 return 0;
2735}
2736
17d3883f 2737int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
bdc77d1d
JS		 2738{
2739 WCHAR wpath[MAX_PATH];
2740 PSID sid = NULL;
2741 PSECURITY_DESCRIPTOR descriptor = NULL;
2742 DWORD err;
2743
2744 static wchar_t home[MAX_PATH];
2745
2746 int result = 0;
2747
2748 if (xutftowcs_path(wpath, path) < 0)
2749 return 0;
2750
2751 /*
2752 * On Windows, the home directory is owned by the administrator, but for
2753 * all practical purposes, it belongs to the user. Do pretend that it is
2754 * owned by the user.
2755 */
2756 if (!*home) {
2757 DWORD size = ARRAY_SIZE(home);
2758 DWORD len = GetEnvironmentVariableW(L"HOME", home, size);
2759 if (!len || len > size)
2760 wcscpy(home, L"::N/A::");
2761 }
2762 if (!wcsicmp(wpath, home))
2763 return 1;
2764
2765 /* Get the owner SID */
2766 err = GetNamedSecurityInfoW(wpath, SE_FILE_OBJECT,
2767 OWNER_SECURITY_INFORMATION |
2768 DACL_SECURITY_INFORMATION,
2769 &sid, NULL, NULL, NULL, &descriptor);
2770
2771 if (err != ERROR_SUCCESS)
2772 error(_("failed to get owner for '%s' (%ld)"), path, err);
2773 else if (sid && IsValidSid(sid)) {
2774 /* Now, verify that the SID matches the current user's */
2775 static PSID current_user_sid;
3f7207e2 2776 BOOL is_member;
bdc77d1d
JS		 2777
2778 if (!current_user_sid)
2779 current_user_sid = get_current_user_sid();
2780
2781 if (current_user_sid &&
2782 IsValidSid(current_user_sid) &&
2783 EqualSid(sid, current_user_sid))
2784 result = 1;
3f7207e2
JS		 2785 else if (IsWellKnownSid(sid, WinBuiltinAdministratorsSid) &&
2786 CheckTokenMembership(NULL, sid, &is_member) &&
2787 is_member)
2788 /*
2789 * If owned by the Administrators group, and the
2790 * current user is an administrator, we consider that
2791 * okay, too.
2792 */
2793 result = 1;
7c83470e
JS		 2794 else if (report &&
2795 IsWellKnownSid(sid, WinWorldSid) &&
2796 !acls_supported(path)) {
2797 /*
2798 * On FAT32 volumes, ownership is not actually recorded.
2799 */
4eb1ccec 2800 strbuf_addf(report, "'%s' is on a file system that does "
7c83470e
JS		 2801 "not record ownership\n", path);
2802 } else if (report) {
f755e092
SK		 2803 LPSTR str1, str2, str3, str4, to_free1 = NULL,
2804 to_free3 = NULL, to_local_free2 = NULL,
2805 to_local_free4 = NULL;
e883e04b 2806
f755e092 2807 if (user_sid_to_user_name(sid, &str1))
e883e04b
JS		 2808 to_free1 = str1;
2809 else
2810 str1 = "(inconvertible)";
f755e092
SK		 2811 if (ConvertSidToStringSidA(sid, &str2))
2812 to_local_free2 = str2;
e883e04b
JS		 2813 else
2814 str2 = "(inconvertible)";
f755e092
SK		 2815
2816 if (!current_user_sid) {
2817 str3 = "(none)";
2818 str4 = "(none)";
2819 }
2820 else if (!IsValidSid(current_user_sid)) {
2821 str3 = "(invalid)";
2822 str4 = "(invalid)";
2823 } else {
2824 if (user_sid_to_user_name(current_user_sid,
2825 &str3))
2826 to_free3 = str3;
2827 else
2828 str3 = "(inconvertible)";
2829 if (ConvertSidToStringSidA(current_user_sid,
2830 &str4))
2831 to_local_free4 = str4;
2832 else
2833 str4 = "(inconvertible)";
2834 }
e883e04b
JS		 2835 strbuf_addf(report,
2836 "'%s' is owned by:\n"
f755e092
SK		 2837 "\t%s (%s)\nbut the current user is:\n"
2838 "\t%s (%s)\n",
2839 path, str1, str2, str3, str4);
2840 free(to_free1);
2841 LocalFree(to_local_free2);
2842 free(to_free3);
2843 LocalFree(to_local_free4);
e883e04b 2844 }
bdc77d1d
JS		 2845 }
2846
2847 /*
2848 * We can release the security descriptor struct only now because `sid`
2849 * actually points into this struct.
2850 */
2851 if (descriptor)
2852 LocalFree(descriptor);
2853
2854 return result;
2855}
2856
4dc42c6c 2857int is_valid_win32_path(const char *path, int allow_literal_nul)
d2c84dad 2858{
4dc42c6c 2859 const char *p = path;
d2c84dad
JS		 2860 int preceding_space_or_period = 0, i = 0, periods = 0;
2861
2862 if (!protect_ntfs)
2863 return 1;
2864
817ddd64 2865 skip_dos_drive_prefix((char **)&path);
4dc42c6c 2866 goto segment_start;
817ddd64 2867
d2c84dad
JS		 2868 for (;;) {
2869 char c = *(path++);
2870 switch (c) {
2871 case '\0':
2872 case '/': case '\\':
2873 /* cannot end in ` ` or `.`, except for `.` and `..` */
2874 if (preceding_space_or_period &&
2875 (i != periods || periods > 2))
2876 return 0;
2877 if (!c)
2878 return 1;
2879
2880 i = periods = preceding_space_or_period = 0;
4dc42c6c
JS		 2881
2882segment_start:
2883 switch (*path) {
2884 case 'a': case 'A': /* AUX */
2885 if (((c = path[++i]) != 'u' && c != 'U') ||
2886 ((c = path[++i]) != 'x' && c != 'X')) {
2887not_a_reserved_name:
2888 path += i;
2889 continue;
2890 }
2891 break;
b6852e19
JS		 2892 case 'c': case 'C':
2893 /* COM1 ... COM9, CON, CONIN$, CONOUT$ */
4dc42c6c
JS		 2894 if ((c = path[++i]) != 'o' && c != 'O')
2895 goto not_a_reserved_name;
2896 c = path[++i];
b6852e19
JS		 2897 if (c == 'm' || c == 'M') { /* COM1 ... COM9 */
2898 c = path[++i];
2899 if (c < '1' || c > '9')
4dc42c6c
JS		 2900 goto not_a_reserved_name;
2901 } else if (c == 'n' || c == 'N') { /* CON */
2902 c = path[i + 1];
2903 if ((c == 'i' || c == 'I') &&
2904 ((c = path[i + 2]) == 'n' ||
2905 c == 'N') &&
2906 path[i + 3] == '$')
2907 i += 3; /* CONIN$ */
2908 else if ((c == 'o' || c == 'O') &&
2909 ((c = path[i + 2]) == 'u' ||
2910 c == 'U') &&
2911 ((c = path[i + 3]) == 't' ||
2912 c == 'T') &&
2913 path[i + 4] == '$')
2914 i += 4; /* CONOUT$ */
2915 } else
2916 goto not_a_reserved_name;
2917 break;
2918 case 'l': case 'L': /* LPT<N> */
2919 if (((c = path[++i]) != 'p' && c != 'P') ||
2920 ((c = path[++i]) != 't' && c != 'T') ||
2921 !isdigit(path[++i]))
2922 goto not_a_reserved_name;
2923 break;
2924 case 'n': case 'N': /* NUL */
2925 if (((c = path[++i]) != 'u' && c != 'U') ||
2926 ((c = path[++i]) != 'l' && c != 'L') ||
2927 (allow_literal_nul &&
2928 !path[i + 1] && p == path))
2929 goto not_a_reserved_name;
2930 break;
2931 case 'p': case 'P': /* PRN */
2932 if (((c = path[++i]) != 'r' && c != 'R') ||
2933 ((c = path[++i]) != 'n' && c != 'N'))
2934 goto not_a_reserved_name;
2935 break;
2936 default:
2937 continue;
2938 }
2939
2940 /*
2941 * So far, this looks like a reserved name. Let's see
2942 * whether it actually is one: trailing spaces, a file
2943 * extension, or an NTFS Alternate Data Stream do not
2944 * matter, the name is still reserved if any of those
2945 * follow immediately after the actual name.
2946 */
2947 i++;
2948 if (path[i] == ' ') {
2949 preceding_space_or_period = 1;
2950 while (path[++i] == ' ')
2951 ; /* skip all spaces */
2952 }
2953
2954 c = path[i];
9fd512c8 2955 if (c && c != '.' && c != ':' && !is_xplatform_dir_sep(c))
4dc42c6c
JS		 2956 goto not_a_reserved_name;
2957
2958 /* contains reserved name */
2959 return 0;
d2c84dad
JS		 2960 case '.':
2961 periods++;
2962 /* fallthru */
2963 case ' ':
2964 preceding_space_or_period = 1;
2965 i++;
2966 continue;
817ddd64
JS		 2967 case ':': /* DOS drive prefix was already skipped */
2968 case '<': case '>': case '"': case '|': case '?': case '*':
2969 /* illegal character */
2970 return 0;
2971 default:
2972 if (c > '\0' && c < '\x20')
2973 /* illegal character */
2974 return 0;
d2c84dad
JS		 2975 }
2976 preceding_space_or_period = 0;
2977 i++;
2978 }
2979}
2980
396ff754 2981#if !defined(_MSC_VER)
5901dc66
KB		 2982/*
2983 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2984 * mingw startup code, see init.c in mingw runtime).
2985 */
2986int _CRT_glob = 0;
396ff754 2987#endif
3f046148 2988
0767172b 2989static NORETURN void die_startup(void)
3f046148
KB		 2990{
2991 fputs("fatal: not enough memory for initialization", stderr);
2992 exit(128);
2993}
2994
6f1c189c
KB		 2995static void *malloc_startup(size_t size)
2996{
2997 void *result = malloc(size);
2998 if (!result)
2999 die_startup();
3000 return result;
3001}
3002
3003static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
3004{
3005 len = xwcstoutf(buffer, wcs, len) + 1;
3006 return memcpy(malloc_startup(len), buffer, len);
3007}
3008
3f944424
JS		 3009static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
3010 DWORD desired_access, DWORD flags)
3011{
3012 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
3013 wchar_t buf[MAX_PATH];
3014 DWORD max = ARRAY_SIZE(buf);
3015 HANDLE handle;
3016 DWORD ret = GetEnvironmentVariableW(key, buf, max);
3017
3018 if (!ret || ret >= max)
3019 return;
3020
3021 /* make sure this does not leak into child processes */
3022 SetEnvironmentVariableW(key, NULL);
3023 if (!wcscmp(buf, L"off")) {
3024 close(fd);
3025 handle = GetStdHandle(std_id);
3026 if (handle != INVALID_HANDLE_VALUE)
3027 CloseHandle(handle);
3028 return;
3029 }
1a172e4a
JS		 3030 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
3031 handle = GetStdHandle(STD_OUTPUT_HANDLE);
3032 if (handle == INVALID_HANDLE_VALUE) {
3033 close(fd);
3034 handle = GetStdHandle(std_id);
3035 if (handle != INVALID_HANDLE_VALUE)
3036 CloseHandle(handle);
3037 } else {
3038 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
3039 SetStdHandle(std_id, handle);
3040 dup2(new_fd, fd);
3041 /* do *not* close the new_fd: that would close stdout */
3042 }
3043 return;
3044 }
3f944424
JS		 3045 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
3046 flags, NULL);
3047 if (handle != INVALID_HANDLE_VALUE) {
3048 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
3049 SetStdHandle(std_id, handle);
3050 dup2(new_fd, fd);
3051 close(new_fd);
3052 }
3053}
3054
3055static void maybe_redirect_std_handles(void)
3056{
3057 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
3058 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
3059 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
3060 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
3061 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
3062 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
3063}
3064
dce7d295
JH		 3065#ifdef _MSC_VER
3066#ifdef _DEBUG
3067#include <crtdbg.h>
3068#endif
3069#endif
3070
396ff754
JS		 3071/*
3072 * We implement wmain() and compile with -municode, which would
3073 * normally ignore main(), but we call the latter from the former
3074 * so that we can handle non-ASCII command-line parameters
3075 * appropriately.
3076 *
3077 * To be more compatible with the core git code, we convert
3078 * argv into UTF8 and pass them directly to main().
3079 */
3080int wmain(int argc, const wchar_t **wargv)
13f1df43 3081{
396ff754
JS		 3082 int i, maxlen, exit_status;
3083 char *buffer, **save;
3084 const char **argv;
3f046148 3085
a0897249
JH		 3086 trace2_initialize_clock();
3087
556702f8 3088#ifdef _MSC_VER
f6a63937
JS		 3089#ifdef _DEBUG
3090 _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
3091#endif
3092
556702f8
JH		 3093#ifdef USE_MSVC_CRTDBG
3094 _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
3095#endif
3096#endif
3097
3f944424
JS		 3098 maybe_redirect_std_handles();
3099
3f046148 3100 /* determine size of argv and environ conversion buffer */
86e25458 3101 maxlen = wcslen(wargv[0]);
3f046148
KB		 3102 for (i = 1; i < argc; i++)
3103 maxlen = max(maxlen, wcslen(wargv[i]));
3104
3105 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
3106 maxlen = 3 * maxlen + 1;
6f1c189c 3107 buffer = malloc_startup(maxlen);
3f046148 3108
396ff754
JS		 3109 /*
3110 * Create a UTF-8 version of w_argv. Also create a "save" copy
3111 * to remember all the string pointers because parse_options()
3112 * will remove claimed items from the argv that we pass down.
3113 */
3114 ALLOC_ARRAY(argv, argc + 1);
3115 ALLOC_ARRAY(save, argc + 1);
86e25458 3116 for (i = 0; i < argc; i++)
396ff754
JS		 3117 argv[i] = save[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
3118 argv[i] = save[i] = NULL;
3f046148 3119 free(buffer);
13f1df43 3120
6dc71543 3121 /* fix Windows specific environment settings */
02e6edc0 3122 setup_windows_environment();
baea068d 3123
0e218f91
JS		 3124 unset_environment_variables = xstrdup("PERL5LIB");
3125
13f1df43
KB		 3126 /* initialize critical section for waitpid pinfo_t list */
3127 InitializeCriticalSection(&pinfo_cs);
3128
3129 /* set up default file mode and file modes for stdin/out/err */
3130 _fmode = _O_BINARY;
3131 _setmode(_fileno(stdin), _O_BINARY);
3132 _setmode(_fileno(stdout), _O_BINARY);
3133 _setmode(_fileno(stderr), _O_BINARY);
eac14f89
KB		 3134
3135 /* initialize Unicode console */
3136 winansi_init();
396ff754
JS		 3137
3138 /* invoke the real main() using our utf8 version of argv. */
3139 exit_status = main(argc, argv);
3140
3141 for (i = 0; i < argc; i++)
3142 free(save[i]);
3143 free(save);
3144 free(argv);
3145
3146 return exit_status;
13f1df43 3147}
7b6aff06
NTND		 3148
3149int uname(struct utsname *buf)
3150{
d62c89af 3151 unsigned v = (unsigned)GetVersion();
7b6aff06 3152 memset(buf, 0, sizeof(*buf));
5096d490
JK		 3153 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
3154 xsnprintf(buf->release, sizeof(buf->release),
3155 "%u.%u", v & 0xff, (v >> 8) & 0xff);
7b6aff06 3156 /* assuming NT variants only.. */
5096d490
JK		 3157 xsnprintf(buf->version, sizeof(buf->version),
3158 "%u", (v >> 16) & 0x7fff);
7b6aff06
NTND		 3159 return 0;
3160}
2406bf5f 3161
395c130f 3162#ifndef NO_UNIX_SOCKETS
2406bf5f
MA		 3163int mingw_have_unix_sockets(void)
3164{
3165 SC_HANDLE scm, srvc;
3166 SERVICE_STATUS_PROCESS status;
3167 DWORD bytes;
3168 int ret = 0;
3169 scm = OpenSCManagerA(NULL, NULL, SC_MANAGER_CONNECT);
3170 if (scm) {
3171 srvc = OpenServiceA(scm, "afunix", SERVICE_QUERY_STATUS);
3172 if (srvc) {
3173 if(QueryServiceStatusEx(srvc, SC_STATUS_PROCESS_INFO, (LPBYTE)&status, sizeof(SERVICE_STATUS_PROCESS), &bytes))
3174 ret = status.dwCurrentState == SERVICE_RUNNING;
3175 CloseServiceHandle(srvc);
3176 }
3177 CloseServiceHandle(scm);
3178 }
3179 return ret;
3180}
395c130f 3181#endif
Unnamed repository; edit this file 'description' to name the repository.