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[thirdparty/git.git] / compat / mingw.c
CommitLineData
f4626df5 1#include "../git-compat-util.h"
444dc903 2#include "win32.h"
28a559c0 3#include <conio.h>
85faec9d 4#include <wchar.h>
7e5d7768 5#include "../strbuf.h"
c9b78400 6#include "../run-command.h"
7eb2619c 7#include "../cache.h"
f4626df5 8
7c00bc39
JS		 9#define HCAST(type, handle) ((type)(intptr_t)handle)
10
19e12549
HV		 11static const int delay[] = { 0, 1, 10, 20, 40 };
12
44626dc7 13int err_win_to_posix(DWORD winerr)
b3debd2b
PK		 14{
15 int error = ENOSYS;
16 switch(winerr) {
17 case ERROR_ACCESS_DENIED: error = EACCES; break;
18 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
19 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
20 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
21 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
22 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
23 case ERROR_BAD_COMMAND: error = EIO; break;
24 case ERROR_BAD_DEVICE: error = ENODEV; break;
25 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
26 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
27 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
28 case ERROR_BAD_LENGTH: error = EINVAL; break;
29 case ERROR_BAD_PATHNAME: error = ENOENT; break;
30 case ERROR_BAD_PIPE: error = EPIPE; break;
31 case ERROR_BAD_UNIT: error = ENODEV; break;
32 case ERROR_BAD_USERNAME: error = EINVAL; break;
33 case ERROR_BROKEN_PIPE: error = EPIPE; break;
34 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
35 case ERROR_BUSY: error = EBUSY; break;
36 case ERROR_BUSY_DRIVE: error = EBUSY; break;
37 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
38 case ERROR_CANNOT_MAKE: error = EACCES; break;
39 case ERROR_CANTOPEN: error = EIO; break;
40 case ERROR_CANTREAD: error = EIO; break;
41 case ERROR_CANTWRITE: error = EIO; break;
42 case ERROR_CRC: error = EIO; break;
43 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
44 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
45 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
46 case ERROR_DIRECTORY: error = EINVAL; break;
47 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
48 case ERROR_DISK_CHANGE: error = EIO; break;
49 case ERROR_DISK_FULL: error = ENOSPC; break;
50 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
51 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
52 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
53 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
54 case ERROR_FILE_EXISTS: error = EEXIST; break;
55 case ERROR_FILE_INVALID: error = ENODEV; break;
56 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
57 case ERROR_GEN_FAILURE: error = EIO; break;
58 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
59 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
60 case ERROR_INVALID_ACCESS: error = EACCES; break;
61 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
62 case ERROR_INVALID_BLOCK: error = EFAULT; break;
63 case ERROR_INVALID_DATA: error = EINVAL; break;
64 case ERROR_INVALID_DRIVE: error = ENODEV; break;
65 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
66 case ERROR_INVALID_FLAGS: error = EINVAL; break;
67 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
68 case ERROR_INVALID_HANDLE: error = EBADF; break;
69 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
70 case ERROR_INVALID_NAME: error = EINVAL; break;
71 case ERROR_INVALID_OWNER: error = EINVAL; break;
72 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
73 case ERROR_INVALID_PASSWORD: error = EPERM; break;
74 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
75 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
76 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
77 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
78 case ERROR_IO_DEVICE: error = EIO; break;
79 case ERROR_IO_INCOMPLETE: error = EINTR; break;
80 case ERROR_LOCKED: error = EBUSY; break;
81 case ERROR_LOCK_VIOLATION: error = EACCES; break;
82 case ERROR_LOGON_FAILURE: error = EACCES; break;
83 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
84 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
85 case ERROR_MORE_DATA: error = EPIPE; break;
86 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
87 case ERROR_NOACCESS: error = EFAULT; break;
88 case ERROR_NONE_MAPPED: error = EINVAL; break;
89 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
90 case ERROR_NOT_READY: error = EAGAIN; break;
91 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
92 case ERROR_NO_DATA: error = EPIPE; break;
93 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
94 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
95 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
96 case ERROR_OPEN_FAILED: error = EIO; break;
97 case ERROR_OPEN_FILES: error = EBUSY; break;
98 case ERROR_OPERATION_ABORTED: error = EINTR; break;
99 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
100 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
101 case ERROR_PATH_BUSY: error = EBUSY; break;
102 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
103 case ERROR_PIPE_BUSY: error = EBUSY; break;
104 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
105 case ERROR_PIPE_LISTENING: error = EPIPE; break;
106 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
107 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
108 case ERROR_READ_FAULT: error = EIO; break;
109 case ERROR_SEEK: error = EIO; break;
110 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
111 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
112 case ERROR_SHARING_VIOLATION: error = EACCES; break;
113 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
114 case ERROR_SWAPERROR: error = ENOENT; break;
115 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
116 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
117 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
118 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
119 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
120 case ERROR_WRITE_FAULT: error = EIO; break;
121 case ERROR_WRITE_PROTECT: error = EROFS; break;
122 }
123 return error;
124}
125
19e12549
HV		 126static inline int is_file_in_use_error(DWORD errcode)
127{
128 switch (errcode) {
129 case ERROR_SHARING_VIOLATION:
130 case ERROR_ACCESS_DENIED:
131 return 1;
132 }
133
134 return 0;
135}
136
c9b78400
HV		 137static int read_yes_no_answer(void)
138{
139 char answer[1024];
140
141 if (fgets(answer, sizeof(answer), stdin)) {
142 size_t answer_len = strlen(answer);
143 int got_full_line = 0, c;
144
145 /* remove the newline */
146 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
147 answer[answer_len-2] = '\0';
148 got_full_line = 1;
149 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
150 answer[answer_len-1] = '\0';
151 got_full_line = 1;
152 }
153 /* flush the buffer in case we did not get the full line */
154 if (!got_full_line)
155 while ((c = getchar()) != EOF && c != '\n')
156 ;
157 } else
158 /* we could not read, return the
159 * default answer which is no */
160 return 0;
161
162 if (tolower(answer[0]) == 'y' && !answer[1])
163 return 1;
164 if (!strncasecmp(answer, "yes", sizeof(answer)))
165 return 1;
166 if (tolower(answer[0]) == 'n' && !answer[1])
167 return 0;
168 if (!strncasecmp(answer, "no", sizeof(answer)))
169 return 0;
170
171 /* did not find an answer we understand */
172 return -1;
173}
174
175static int ask_yes_no_if_possible(const char *format, ...)
176{
177 char question[4096];
178 const char *retry_hook[] = { NULL, NULL, NULL };
179 va_list args;
180
181 va_start(args, format);
182 vsnprintf(question, sizeof(question), format, args);
183 va_end(args);
184
06bc4b79 185 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
c9b78400
HV		 186 retry_hook[1] = question;
187 return !run_command_v_opt(retry_hook, 0);
188 }
189
190 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
191 return 0;
192
193 while (1) {
194 int answer;
195 fprintf(stderr, "%s (y/n) ", question);
196
197 if ((answer = read_yes_no_answer()) >= 0)
198 return answer;
199
200 fprintf(stderr, "Sorry, I did not understand your answer. "
201 "Please type 'y' or 'n'\n");
202 }
203}
204
337967fb
HV		 205int mingw_unlink(const char *pathname)
206{
19e12549 207 int ret, tries = 0;
85faec9d
KB		 208 wchar_t wpathname[MAX_PATH];
209 if (xutftowcs_path(wpathname, pathname) < 0)
210 return -1;
19e12549 211
337967fb 212 /* read-only files cannot be removed */
85faec9d
KB		 213 _wchmod(wpathname, 0666);
214 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
19e12549
HV		 215 if (!is_file_in_use_error(GetLastError()))
216 break;
217 /*
218 * We assume that some other process had the source or
219 * destination file open at the wrong moment and retry.
220 * In order to give the other process a higher chance to
221 * complete its operation, we give up our time slice now.
222 * If we have to retry again, we do sleep a bit.
223 */
224 Sleep(delay[tries]);
225 tries++;
226 }
c9b78400
HV		 227 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
228 ask_yes_no_if_possible("Unlink of file '%s' failed. "
229 "Should I try again?", pathname))
85faec9d 230 ret = _wunlink(wpathname);
19e12549 231 return ret;
337967fb
HV		 232}
233
85faec9d 234static int is_dir_empty(const wchar_t *wpath)
ab1a11be 235{
85faec9d 236 WIN32_FIND_DATAW findbuf;
ab1a11be 237 HANDLE handle;
85faec9d
KB		 238 wchar_t wbuf[MAX_PATH + 2];
239 wcscpy(wbuf, wpath);
240 wcscat(wbuf, L"\\*");
241 handle = FindFirstFileW(wbuf, &findbuf);
242 if (handle == INVALID_HANDLE_VALUE)
ab1a11be 243 return GetLastError() == ERROR_NO_MORE_FILES;
ab1a11be 244
85faec9d
KB		 245 while (!wcscmp(findbuf.cFileName, L".") ||
246 !wcscmp(findbuf.cFileName, L".."))
247 if (!FindNextFileW(handle, &findbuf)) {
248 DWORD err = GetLastError();
249 FindClose(handle);
250 return err == ERROR_NO_MORE_FILES;
ab1a11be
JS		 251 }
252 FindClose(handle);
ab1a11be
JS		 253 return 0;
254}
255
4f288100
HV		 256int mingw_rmdir(const char *pathname)
257{
258 int ret, tries = 0;
85faec9d
KB		 259 wchar_t wpathname[MAX_PATH];
260 if (xutftowcs_path(wpathname, pathname) < 0)
261 return -1;
4f288100 262
85faec9d 263 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
4f288100 264 if (!is_file_in_use_error(GetLastError()))
a83b2b57
EFL		 265 errno = err_win_to_posix(GetLastError());
266 if (errno != EACCES)
4f288100 267 break;
85faec9d 268 if (!is_dir_empty(wpathname)) {
ab1a11be
JS		 269 errno = ENOTEMPTY;
270 break;
271 }
4f288100
HV		 272 /*
273 * We assume that some other process had the source or
274 * destination file open at the wrong moment and retry.
275 * In order to give the other process a higher chance to
276 * complete its operation, we give up our time slice now.
277 * If we have to retry again, we do sleep a bit.
278 */
279 Sleep(delay[tries]);
280 tries++;
281 }
a83b2b57 282 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
4f288100
HV		 283 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
284 "Should I try again?", pathname))
85faec9d
KB		 285 ret = _wrmdir(wpathname);
286 return ret;
287}
288
f30afdab
JS		 289static inline int needs_hiding(const char *path)
290{
291 const char *basename;
292
293 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
294 return 0;
295
296 /* We cannot use basename(), as it would remove trailing slashes */
297 mingw_skip_dos_drive_prefix((char **)&path);
298 if (!*path)
299 return 0;
300
301 for (basename = path; *path; path++)
302 if (is_dir_sep(*path)) {
303 do {
304 path++;
305 } while (is_dir_sep(*path));
306 /* ignore trailing slashes */
307 if (*path)
308 basename = path;
309 }
310
311 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
312 return *basename == '.';
313
314 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
315 return !strncasecmp(".git", basename, 4) &&
316 (!basename[4] || is_dir_sep(basename[4]));
317}
318
319static int set_hidden_flag(const wchar_t *path, int set)
320{
321 DWORD original = GetFileAttributesW(path), modified;
322 if (set)
323 modified = original | FILE_ATTRIBUTE_HIDDEN;
324 else
325 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
326 if (original == modified || SetFileAttributesW(path, modified))
327 return 0;
328 errno = err_win_to_posix(GetLastError());
329 return -1;
330}
331
85faec9d
KB		 332int mingw_mkdir(const char *path, int mode)
333{
334 int ret;
335 wchar_t wpath[MAX_PATH];
336 if (xutftowcs_path(wpath, path) < 0)
337 return -1;
338 ret = _wmkdir(wpath);
f30afdab
JS		 339 if (!ret && needs_hiding(path))
340 return set_hidden_flag(wpath, 1);
4f288100
HV		 341 return ret;
342}
343
3e4a1ba0
JS		 344int mingw_open (const char *filename, int oflags, ...)
345{
346 va_list args;
347 unsigned mode;
0d30ad71 348 int fd;
85faec9d 349 wchar_t wfilename[MAX_PATH];
0d30ad71 350
3e4a1ba0
JS		 351 va_start(args, oflags);
352 mode = va_arg(args, int);
353 va_end(args);
354
1a404209 355 if (filename && !strcmp(filename, "/dev/null"))
3e4a1ba0 356 filename = "nul";
0d30ad71 357
85faec9d
KB		 358 if (xutftowcs_path(wfilename, filename) < 0)
359 return -1;
360 fd = _wopen(wfilename, oflags, mode);
0d30ad71 361
ba6fad02 362 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
85faec9d 363 DWORD attrs = GetFileAttributesW(wfilename);
3e4a1ba0
JS		 364 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
365 errno = EISDIR;
366 }
f30afdab
JS		 367 if ((oflags & O_CREAT) && needs_hiding(filename)) {
368 /*
369 * Internally, _wopen() uses the CreateFile() API which errors
370 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
371 * specified and an already existing file's attributes do not
372 * match *exactly*. As there is no mode or flag we can set that
373 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
374 * again *without* the O_CREAT flag (that corresponds to the
375 * CREATE_ALWAYS flag of CreateFile()).
376 */
377 if (fd < 0 && errno == EACCES)
378 fd = _wopen(wfilename, oflags & ~O_CREAT, mode);
379 if (fd >= 0 && set_hidden_flag(wfilename, 1))
380 warning("could not mark '%s' as hidden.", filename);
381 }
3e4a1ba0
JS		 382 return fd;
383}
384
176478a8
EFL		 385static BOOL WINAPI ctrl_ignore(DWORD type)
386{
387 return TRUE;
388}
389
390#undef fgetc
391int mingw_fgetc(FILE *stream)
392{
393 int ch;
394 if (!isatty(_fileno(stream)))
395 return fgetc(stream);
396
397 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
398 while (1) {
399 ch = fgetc(stream);
400 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
401 break;
402
403 /* Ctrl+C was pressed, simulate SIGINT and retry */
404 mingw_raise(SIGINT);
405 }
406 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
407 return ch;
408}
409
3fdcdbdf
JS		 410#undef fopen
411FILE *mingw_fopen (const char *filename, const char *otype)
412{
f30afdab 413 int hide = needs_hiding(filename);
85faec9d
KB		 414 FILE *file;
415 wchar_t wfilename[MAX_PATH], wotype[4];
1a404209 416 if (filename && !strcmp(filename, "/dev/null"))
3fdcdbdf 417 filename = "nul";
85faec9d
KB		 418 if (xutftowcs_path(wfilename, filename) < 0 ||
419 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
420 return NULL;
f30afdab
JS		 421 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
422 error("could not unhide %s", filename);
423 return NULL;
424 }
85faec9d 425 file = _wfopen(wfilename, wotype);
f30afdab
JS		 426 if (file && hide && set_hidden_flag(wfilename, 1))
427 warning("could not mark '%s' as hidden.", filename);
85faec9d 428 return file;
3fdcdbdf
JS		 429}
430
3fdcdbdf
JS		 431FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
432{
f30afdab 433 int hide = needs_hiding(filename);
85faec9d
KB		 434 FILE *file;
435 wchar_t wfilename[MAX_PATH], wotype[4];
3fdcdbdf
JS		 436 if (filename && !strcmp(filename, "/dev/null"))
437 filename = "nul";
85faec9d
KB		 438 if (xutftowcs_path(wfilename, filename) < 0 ||
439 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
440 return NULL;
f30afdab
JS		 441 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
442 error("could not unhide %s", filename);
443 return NULL;
444 }
85faec9d 445 file = _wfreopen(wfilename, wotype, stream);
f30afdab
JS		 446 if (file && hide && set_hidden_flag(wfilename, 1))
447 warning("could not mark '%s' as hidden.", filename);
85faec9d 448 return file;
3fdcdbdf
JS		 449}
450
84adb641
JS		 451#undef fflush
452int mingw_fflush(FILE *stream)
453{
454 int ret = fflush(stream);
455
456 /*
457 * write() is used behind the scenes of stdio output functions.
458 * Since git code does not check for errors after each stdio write
459 * operation, it can happen that write() is called by a later
460 * stdio function even if an earlier write() call failed. In the
461 * case of a pipe whose readable end was closed, only the first
462 * call to write() reports EPIPE on Windows. Subsequent write()
463 * calls report EINVAL. It is impossible to notice whether this
464 * fflush invocation triggered such a case, therefore, we have to
465 * catch all EINVAL errors whole-sale.
466 */
467 if (ret && errno == EINVAL)
468 errno = EPIPE;
469
470 return ret;
471}
472
2b86292e
JS		 473#undef write
474ssize_t mingw_write(int fd, const void *buf, size_t len)
475{
476 ssize_t result = write(fd, buf, len);
477
478 if (result < 0 && errno == EINVAL && buf) {
479 /* check if fd is a pipe */
480 HANDLE h = (HANDLE) _get_osfhandle(fd);
481 if (GetFileType(h) == FILE_TYPE_PIPE)
482 errno = EPIPE;
483 else
484 errno = EINVAL;
485 }
486
487 return result;
488}
489
85faec9d
KB		 490int mingw_access(const char *filename, int mode)
491{
492 wchar_t wfilename[MAX_PATH];
493 if (xutftowcs_path(wfilename, filename) < 0)
494 return -1;
495 /* X_OK is not supported by the MSVCRT version */
496 return _waccess(wfilename, mode & ~X_OK);
497}
498
499int mingw_chdir(const char *dirname)
500{
501 wchar_t wdirname[MAX_PATH];
502 if (xutftowcs_path(wdirname, dirname) < 0)
503 return -1;
504 return _wchdir(wdirname);
505}
506
507int mingw_chmod(const char *filename, int mode)
508{
509 wchar_t wfilename[MAX_PATH];
510 if (xutftowcs_path(wfilename, filename) < 0)
511 return -1;
512 return _wchmod(wfilename, mode);
513}
514
a6d15bc3
JS		 515/*
516 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
517 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
518 */
519static inline long long filetime_to_hnsec(const FILETIME *ft)
5411bdc4
MSO		 520{
521 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
a6d15bc3
JS		 522 /* Windows to Unix Epoch conversion */
523 return winTime - 116444736000000000LL;
524}
525
526static inline time_t filetime_to_time_t(const FILETIME *ft)
527{
528 return (time_t)(filetime_to_hnsec(ft) / 10000000);
5411bdc4
MSO		 529}
530
4b0abd5c
JS		 531/**
532 * Verifies that safe_create_leading_directories() would succeed.
533 */
534static int has_valid_directory_prefix(wchar_t *wfilename)
535{
536 int n = wcslen(wfilename);
537
538 while (n > 0) {
539 wchar_t c = wfilename[--n];
540 DWORD attributes;
541
542 if (!is_dir_sep(c))
543 continue;
544
545 wfilename[n] = L'\0';
546 attributes = GetFileAttributesW(wfilename);
547 wfilename[n] = c;
548 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
549 attributes == FILE_ATTRIBUTE_DEVICE)
550 return 1;
551 if (attributes == INVALID_FILE_ATTRIBUTES)
552 switch (GetLastError()) {
553 case ERROR_PATH_NOT_FOUND:
554 continue;
555 case ERROR_FILE_NOT_FOUND:
556 /* This implies parent directory exists. */
557 return 1;
558 }
559 return 0;
560 }
561 return 1;
562}
563
5411bdc4
MSO		 564/* We keep the do_lstat code in a separate function to avoid recursion.
565 * When a path ends with a slash, the stat will fail with ENOENT. In
566 * this case, we strip the trailing slashes and stat again.
9b9784ca
PT		 567 *
568 * If follow is true then act like stat() and report on the link
569 * target. Otherwise report on the link itself.
5411bdc4 570 */
9b9784ca 571static int do_lstat(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 572{
573 WIN32_FILE_ATTRIBUTE_DATA fdata;
85faec9d
KB		 574 wchar_t wfilename[MAX_PATH];
575 if (xutftowcs_path(wfilename, file_name) < 0)
576 return -1;
5411bdc4 577
85faec9d 578 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
5411bdc4
MSO		 579 buf->st_ino = 0;
580 buf->st_gid = 0;
581 buf->st_uid = 0;
180964f0 582 buf->st_nlink = 1;
444dc903 583 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 584 buf->st_size = fdata.nFileSizeLow |
585 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 586 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
5411bdc4
MSO		 587 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
588 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
589 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
9b9784ca 590 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
85faec9d
KB		 591 WIN32_FIND_DATAW findbuf;
592 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
9b9784ca
PT		 593 if (handle != INVALID_HANDLE_VALUE) {
594 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
595 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
596 if (follow) {
597 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
598 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
599 } else {
600 buf->st_mode = S_IFLNK;
601 }
602 buf->st_mode |= S_IREAD;
603 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
604 buf->st_mode |= S_IWRITE;
605 }
606 FindClose(handle);
607 }
608 }
5411bdc4
MSO		 609 return 0;
610 }
85faec9d
KB		 611 switch (GetLastError()) {
612 case ERROR_ACCESS_DENIED:
613 case ERROR_SHARING_VIOLATION:
614 case ERROR_LOCK_VIOLATION:
615 case ERROR_SHARING_BUFFER_EXCEEDED:
616 errno = EACCES;
617 break;
618 case ERROR_BUFFER_OVERFLOW:
619 errno = ENAMETOOLONG;
620 break;
621 case ERROR_NOT_ENOUGH_MEMORY:
622 errno = ENOMEM;
623 break;
4b0abd5c
JS		 624 case ERROR_PATH_NOT_FOUND:
625 if (!has_valid_directory_prefix(wfilename)) {
626 errno = ENOTDIR;
627 break;
628 }
629 /* fallthru */
85faec9d
KB		 630 default:
631 errno = ENOENT;
632 break;
633 }
5411bdc4
MSO		 634 return -1;
635}
636
637/* We provide our own lstat/fstat functions, since the provided
638 * lstat/fstat functions are so slow. These stat functions are
639 * tailored for Git's usage (read: fast), and are not meant to be
640 * complete. Note that Git stat()s are redirected to mingw_lstat()
641 * too, since Windows doesn't really handle symlinks that well.
642 */
9b9784ca 643static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 644{
645 int namelen;
58aa3d2a 646 char alt_name[PATH_MAX];
5411bdc4 647
9b9784ca 648 if (!do_lstat(follow, file_name, buf))
5411bdc4
MSO		 649 return 0;
650
651 /* if file_name ended in a '/', Windows returned ENOENT;
652 * try again without trailing slashes
653 */
654 if (errno != ENOENT)
655 return -1;
656
657 namelen = strlen(file_name);
658 if (namelen && file_name[namelen-1] != '/')
659 return -1;
660 while (namelen && file_name[namelen-1] == '/')
661 --namelen;
662 if (!namelen || namelen >= PATH_MAX)
663 return -1;
664
665 memcpy(alt_name, file_name, namelen);
666 alt_name[namelen] = 0;
9b9784ca
PT		 667 return do_lstat(follow, alt_name, buf);
668}
669
670int mingw_lstat(const char *file_name, struct stat *buf)
671{
672 return do_stat_internal(0, file_name, buf);
673}
674int mingw_stat(const char *file_name, struct stat *buf)
675{
676 return do_stat_internal(1, file_name, buf);
5411bdc4
MSO		 677}
678
180964f0 679int mingw_fstat(int fd, struct stat *buf)
5411bdc4
MSO		 680{
681 HANDLE fh = (HANDLE)_get_osfhandle(fd);
682 BY_HANDLE_FILE_INFORMATION fdata;
683
684 if (fh == INVALID_HANDLE_VALUE) {
685 errno = EBADF;
686 return -1;
687 }
688 /* direct non-file handles to MS's fstat() */
180964f0 689 if (GetFileType(fh) != FILE_TYPE_DISK)
1d4e4cd4 690 return _fstati64(fd, buf);
5411bdc4
MSO		 691
692 if (GetFileInformationByHandle(fh, &fdata)) {
5411bdc4
MSO		 693 buf->st_ino = 0;
694 buf->st_gid = 0;
695 buf->st_uid = 0;
180964f0 696 buf->st_nlink = 1;
444dc903 697 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 698 buf->st_size = fdata.nFileSizeLow |
699 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 700 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
5411bdc4
MSO		 701 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
702 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
703 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
704 return 0;
705 }
706 errno = EBADF;
707 return -1;
708}
709
7c0ffa1c
JS		 710static inline void time_t_to_filetime(time_t t, FILETIME *ft)
711{
712 long long winTime = t * 10000000LL + 116444736000000000LL;
713 ft->dwLowDateTime = winTime;
714 ft->dwHighDateTime = winTime >> 32;
715}
716
717int mingw_utime (const char *file_name, const struct utimbuf *times)
718{
719 FILETIME mft, aft;
720 int fh, rc;
85faec9d
KB		 721 DWORD attrs;
722 wchar_t wfilename[MAX_PATH];
723 if (xutftowcs_path(wfilename, file_name) < 0)
724 return -1;
7c0ffa1c
JS		 725
726 /* must have write permission */
85faec9d 727 attrs = GetFileAttributesW(wfilename);
852f098c
JS		 728 if (attrs != INVALID_FILE_ATTRIBUTES &&
729 (attrs & FILE_ATTRIBUTE_READONLY)) {
730 /* ignore errors here; open() will report them */
85faec9d 731 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
852f098c
JS		 732 }
733
85faec9d 734 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
852f098c
JS		 735 rc = -1;
736 goto revert_attrs;
737 }
7c0ffa1c 738
ded2d476
SG		 739 if (times) {
740 time_t_to_filetime(times->modtime, &mft);
741 time_t_to_filetime(times->actime, &aft);
742 } else {
743 GetSystemTimeAsFileTime(&mft);
744 aft = mft;
745 }
7c0ffa1c
JS		 746 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
747 errno = EINVAL;
748 rc = -1;
749 } else
750 rc = 0;
751 close(fh);
852f098c
JS		 752
753revert_attrs:
754 if (attrs != INVALID_FILE_ATTRIBUTES &&
755 (attrs & FILE_ATTRIBUTE_READONLY)) {
756 /* ignore errors again */
85faec9d 757 SetFileAttributesW(wfilename, attrs);
852f098c 758 }
7c0ffa1c
JS		 759 return rc;
760}
761
f4626df5
JS		 762unsigned int sleep (unsigned int seconds)
763{
764 Sleep(seconds*1000);
765 return 0;
766}
767
85faec9d
KB		 768char *mingw_mktemp(char *template)
769{
770 wchar_t wtemplate[MAX_PATH];
771 if (xutftowcs_path(wtemplate, template) < 0)
772 return NULL;
773 if (!_wmktemp(wtemplate))
774 return NULL;
775 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
776 return NULL;
777 return template;
778}
779
f4626df5
JS		 780int mkstemp(char *template)
781{
782 char *filename = mktemp(template);
783 if (filename == NULL)
784 return -1;
785 return open(filename, O_RDWR | O_CREAT, 0600);
786}
787
788int gettimeofday(struct timeval *tv, void *tz)
789{
a6d15bc3
JS		 790 FILETIME ft;
791 long long hnsec;
792
793 GetSystemTimeAsFileTime(&ft);
794 hnsec = filetime_to_hnsec(&ft);
795 tv->tv_sec = hnsec / 10000000;
796 tv->tv_usec = (hnsec % 10000000) / 10;
a42a0c2e 797 return 0;
f4626df5
JS		 798}
799
897bb8cb
JS		 800int pipe(int filedes[2])
801{
3e34d665 802 HANDLE h[2];
897bb8cb 803
3e34d665
JS		 804 /* this creates non-inheritable handles */
805 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
806 errno = err_win_to_posix(GetLastError());
897bb8cb
JS		 807 return -1;
808 }
7c00bc39 809 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
3e34d665 810 if (filedes[0] < 0) {
897bb8cb
JS		 811 CloseHandle(h[0]);
812 CloseHandle(h[1]);
813 return -1;
814 }
7c00bc39 815 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
c3cb7b6f 816 if (filedes[1] < 0) {
897bb8cb 817 close(filedes[0]);
897bb8cb
JS		 818 CloseHandle(h[1]);
819 return -1;
820 }
897bb8cb
JS		 821 return 0;
822}
823
f4626df5
JS		 824struct tm *gmtime_r(const time_t *timep, struct tm *result)
825{
826 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
827 memcpy(result, gmtime(timep), sizeof(struct tm));
828 return result;
829}
830
831struct tm *localtime_r(const time_t *timep, struct tm *result)
832{
833 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
834 memcpy(result, localtime(timep), sizeof(struct tm));
835 return result;
836}
837
25fe217b
JS		 838char *mingw_getcwd(char *pointer, int len)
839{
85faec9d
KB		 840 wchar_t wpointer[MAX_PATH];
841 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
842 return NULL;
843 if (xwcstoutf(pointer, wpointer, len) < 0)
844 return NULL;
8e9b2080 845 convert_slashes(pointer);
85faec9d 846 return pointer;
25fe217b
JS		 847}
848
7e5d7768
JS		 849/*
850 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
851 * (Parsing C++ Command-Line Arguments)
852 */
853static const char *quote_arg(const char *arg)
854{
855 /* count chars to quote */
856 int len = 0, n = 0;
857 int force_quotes = 0;
858 char *q, *d;
859 const char *p = arg;
860 if (!*p) force_quotes = 1;
861 while (*p) {
3aea1a5a 862 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
7e5d7768
JS		 863 force_quotes = 1;
864 else if (*p == '"')
865 n++;
866 else if (*p == '\\') {
867 int count = 0;
868 while (*p == '\\') {
869 count++;
870 p++;
871 len++;
872 }
873 if (*p == '"')
874 n += count*2 + 1;
875 continue;
876 }
877 len++;
878 p++;
879 }
880 if (!force_quotes && n == 0)
881 return arg;
882
883 /* insert \ where necessary */
50a6c8ef 884 d = q = xmalloc(st_add3(len, n, 3));
7e5d7768
JS		 885 *d++ = '"';
886 while (*arg) {
887 if (*arg == '"')
888 *d++ = '\\';
889 else if (*arg == '\\') {
890 int count = 0;
891 while (*arg == '\\') {
892 count++;
893 *d++ = *arg++;
894 }
895 if (*arg == '"') {
896 while (count-- > 0)
897 *d++ = '\\';
898 *d++ = '\\';
899 }
900 }
901 *d++ = *arg++;
902 }
903 *d++ = '"';
904 *d++ = 0;
905 return q;
906}
907
f1a4dfb8
JS		 908static const char *parse_interpreter(const char *cmd)
909{
910 static char buf[100];
911 char *p, *opt;
912 int n, fd;
913
914 /* don't even try a .exe */
915 n = strlen(cmd);
916 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
917 return NULL;
918
919 fd = open(cmd, O_RDONLY);
920 if (fd < 0)
921 return NULL;
922 n = read(fd, buf, sizeof(buf)-1);
923 close(fd);
924 if (n < 4) /* at least '#!/x' and not error */
925 return NULL;
926
927 if (buf[0] != '#' || buf[1] != '!')
928 return NULL;
929 buf[n] = '\0';
bedc4279
PH		 930 p = buf + strcspn(buf, "\r\n");
931 if (!*p)
f1a4dfb8
JS		 932 return NULL;
933
934 *p = '\0';
935 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
936 return NULL;
937 /* strip options */
938 if ((opt = strchr(p+1, ' ')))
939 *opt = '\0';
940 return p+1;
941}
942
943/*
944 * Splits the PATH into parts.
945 */
946static char **get_path_split(void)
947{
06bc4b79 948 char *p, **path, *envpath = mingw_getenv("PATH");
f1a4dfb8
JS		 949 int i, n = 0;
950
951 if (!envpath || !*envpath)
952 return NULL;
953
954 envpath = xstrdup(envpath);
955 p = envpath;
956 while (p) {
957 char *dir = p;
958 p = strchr(p, ';');
959 if (p) *p++ = '\0';
960 if (*dir) { /* not earlier, catches series of ; */
961 ++n;
962 }
963 }
964 if (!n)
965 return NULL;
966
b32fa95f 967 ALLOC_ARRAY(path, n + 1);
f1a4dfb8
JS		 968 p = envpath;
969 i = 0;
970 do {
971 if (*p)
972 path[i++] = xstrdup(p);
973 p = p+strlen(p)+1;
974 } while (i < n);
975 path[i] = NULL;
976
977 free(envpath);
978
979 return path;
980}
981
982static void free_path_split(char **path)
983{
0d30ad71
FL		 984 char **p = path;
985
f1a4dfb8
JS		 986 if (!path)
987 return;
988
f1a4dfb8
JS		 989 while (*p)
990 free(*p++);
991 free(path);
992}
993
994/*
995 * exe_only means that we only want to detect .exe files, but not scripts
996 * (which do not have an extension)
997 */
998static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
999{
1000 char path[MAX_PATH];
1001 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
1002
1003 if (!isexe && access(path, F_OK) == 0)
1004 return xstrdup(path);
1005 path[strlen(path)-4] = '\0';
1006 if ((!exe_only || isexe) && access(path, F_OK) == 0)
fe77b695
ER		 1007 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1008 return xstrdup(path);
f1a4dfb8
JS		 1009 return NULL;
1010}
1011
1012/*
22e5e58a 1013 * Determines the absolute path of cmd using the split path in path.
f1a4dfb8
JS		 1014 * If cmd contains a slash or backslash, no lookup is performed.
1015 */
1016static char *path_lookup(const char *cmd, char **path, int exe_only)
1017{
1018 char *prog = NULL;
1019 int len = strlen(cmd);
1020 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1021
1022 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1023 prog = xstrdup(cmd);
1024
1025 while (!prog && *path)
1026 prog = lookup_prog(*path++, cmd, isexe, exe_only);
1027
1028 return prog;
1029}
1030
f279242d
KB		 1031static int do_putenv(char **env, const char *name, int size, int free_old);
1032
1033/* used number of elements of environ array, including terminating NULL */
1034static int environ_size = 0;
1035/* allocated size of environ array, in bytes */
1036static int environ_alloc = 0;
77734da2 1037
df0e998c 1038/*
77734da2
KB		 1039 * Create environment block suitable for CreateProcess. Merges current
1040 * process environment and the supplied environment changes.
df0e998c 1041 */
77734da2 1042static wchar_t *make_environment_block(char **deltaenv)
7e5d7768 1043{
df0e998c 1044 wchar_t *wenvblk = NULL;
f279242d
KB		 1045 char **tmpenv;
1046 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
df0e998c 1047
f279242d
KB		 1048 while (deltaenv && deltaenv[i])
1049 i++;
df0e998c 1050
f279242d 1051 /* copy the environment, leaving space for changes */
b32fa95f 1052 ALLOC_ARRAY(tmpenv, size + i);
f279242d 1053 memcpy(tmpenv, environ, size * sizeof(char*));
77734da2
KB		 1054
1055 /* merge supplied environment changes into the temporary environment */
f279242d
KB		 1056 for (i = 0; deltaenv && deltaenv[i]; i++)
1057 size = do_putenv(tmpenv, deltaenv[i], size, 0);
77734da2 1058
df0e998c 1059 /* create environment block from temporary environment */
f279242d
KB		 1060 for (i = 0; tmpenv[i]; i++) {
1061 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
df0e998c 1062 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
f279242d 1063 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
df0e998c
KB		 1064 }
1065 /* add final \0 terminator */
1066 wenvblk[wenvpos] = 0;
1067 free(tmpenv);
1068 return wenvblk;
7e5d7768
JS		 1069}
1070
52de4db5
EFL		 1071struct pinfo_t {
1072 struct pinfo_t *next;
1073 pid_t pid;
1074 HANDLE proc;
657b35f4
RJ		 1075};
1076static struct pinfo_t *pinfo = NULL;
52de4db5
EFL		 1077CRITICAL_SECTION pinfo_cs;
1078
77734da2 1079static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1080 const char *dir,
75301f90 1081 int prepend_cmd, int fhin, int fhout, int fherr)
7e5d7768 1082{
99c3c76d 1083 STARTUPINFOW si;
7e5d7768 1084 PROCESS_INFORMATION pi;
7eb2619c
KB		 1085 struct strbuf args;
1086 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1087 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
7e5d7768
JS		 1088 BOOL ret;
1089
1090 /* Determine whether or not we are associated to a console */
1091 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1092 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1093 FILE_ATTRIBUTE_NORMAL, NULL);
1094 if (cons == INVALID_HANDLE_VALUE) {
1095 /* There is no console associated with this process.
1096 * Since the child is a console process, Windows
1097 * would normally create a console window. But
1098 * since we'll be redirecting std streams, we do
1099 * not need the console.
19fb896f
AG		 1100 * It is necessary to use DETACHED_PROCESS
1101 * instead of CREATE_NO_WINDOW to make ssh
1102 * recognize that it has no console.
7e5d7768 1103 */
7eb2619c 1104 flags |= DETACHED_PROCESS;
7e5d7768
JS		 1105 } else {
1106 /* There is already a console. If we specified
19fb896f 1107 * DETACHED_PROCESS here, too, Windows would
7e5d7768 1108 * disassociate the child from the console.
19fb896f 1109 * The same is true for CREATE_NO_WINDOW.
7e5d7768
JS		 1110 * Go figure!
1111 */
7e5d7768
JS		 1112 CloseHandle(cons);
1113 }
1114 memset(&si, 0, sizeof(si));
1115 si.cb = sizeof(si);
1116 si.dwFlags = STARTF_USESTDHANDLES;
eac14f89
KB		 1117 si.hStdInput = winansi_get_osfhandle(fhin);
1118 si.hStdOutput = winansi_get_osfhandle(fhout);
1119 si.hStdError = winansi_get_osfhandle(fherr);
7e5d7768 1120
99c3c76d
KB		 1121 if (xutftowcs_path(wcmd, cmd) < 0)
1122 return -1;
1123 if (dir && xutftowcs_path(wdir, dir) < 0)
1124 return -1;
1125
7e5d7768
JS		 1126 /* concatenate argv, quoting args as we go */
1127 strbuf_init(&args, 0);
1128 if (prepend_cmd) {
1129 char *quoted = (char *)quote_arg(cmd);
1130 strbuf_addstr(&args, quoted);
1131 if (quoted != cmd)
1132 free(quoted);
1133 }
1134 for (; *argv; argv++) {
1135 char *quoted = (char *)quote_arg(*argv);
1136 if (*args.buf)
1137 strbuf_addch(&args, ' ');
1138 strbuf_addstr(&args, quoted);
1139 if (quoted != *argv)
1140 free(quoted);
1141 }
1142
8d5b3325 1143 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
99c3c76d
KB		 1144 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1145 strbuf_release(&args);
1146
77734da2 1147 wenvblk = make_environment_block(deltaenv);
7e5d7768
JS		 1148
1149 memset(&pi, 0, sizeof(pi));
99c3c76d 1150 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
7eb2619c 1151 wenvblk, dir ? wdir : NULL, &si, &pi);
7e5d7768 1152
7eb2619c 1153 free(wenvblk);
99c3c76d 1154 free(wargs);
7e5d7768
JS		 1155
1156 if (!ret) {
1157 errno = ENOENT;
1158 return -1;
1159 }
1160 CloseHandle(pi.hThread);
52de4db5
EFL		 1161
1162 /*
1163 * The process ID is the human-readable identifier of the process
1164 * that we want to present in log and error messages. The handle
1165 * is not useful for this purpose. But we cannot close it, either,
1166 * because it is not possible to turn a process ID into a process
1167 * handle after the process terminated.
1168 * Keep the handle in a list for waitpid.
1169 */
1170 EnterCriticalSection(&pinfo_cs);
1171 {
1172 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1173 info->pid = pi.dwProcessId;
1174 info->proc = pi.hProcess;
1175 info->next = pinfo;
1176 pinfo = info;
1177 }
1178 LeaveCriticalSection(&pinfo_cs);
1179
1180 return (pid_t)pi.dwProcessId;
7e5d7768
JS		 1181}
1182
3e66e47b 1183static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
75301f90 1184{
77734da2 1185 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
75301f90
JS		 1186}
1187
77734da2 1188pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1189 const char *dir,
75301f90 1190 int fhin, int fhout, int fherr)
7e5d7768
JS		 1191{
1192 pid_t pid;
1193 char **path = get_path_split();
1194 char *prog = path_lookup(cmd, path, 0);
1195
1196 if (!prog) {
1197 errno = ENOENT;
1198 pid = -1;
1199 }
1200 else {
1201 const char *interpr = parse_interpreter(prog);
1202
1203 if (interpr) {
1204 const char *argv0 = argv[0];
1205 char *iprog = path_lookup(interpr, path, 1);
1206 argv[0] = prog;
1207 if (!iprog) {
1208 errno = ENOENT;
1209 pid = -1;
1210 }
1211 else {
77734da2 1212 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
75301f90 1213 fhin, fhout, fherr);
7e5d7768
JS		 1214 free(iprog);
1215 }
1216 argv[0] = argv0;
1217 }
1218 else
77734da2 1219 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
75301f90 1220 fhin, fhout, fherr);
7e5d7768
JS		 1221 free(prog);
1222 }
1223 free_path_split(path);
1224 return pid;
1225}
1226
3e66e47b 1227static int try_shell_exec(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1228{
1229 const char *interpr = parse_interpreter(cmd);
1230 char **path;
1231 char *prog;
1232 int pid = 0;
1233
1234 if (!interpr)
1235 return 0;
1236 path = get_path_split();
1237 prog = path_lookup(interpr, path, 1);
1238 if (prog) {
1239 int argc = 0;
1240 const char **argv2;
1241 while (argv[argc]) argc++;
b32fa95f 1242 ALLOC_ARRAY(argv2, argc + 1);
7e5d7768
JS		 1243 argv2[0] = (char *)cmd; /* full path to the script file */
1244 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
3e66e47b 1245 pid = mingw_spawnv(prog, argv2, 1);
f1a4dfb8
JS		 1246 if (pid >= 0) {
1247 int status;
1248 if (waitpid(pid, &status, 0) < 0)
1249 status = 255;
1250 exit(status);
1251 }
1252 pid = 1; /* indicate that we tried but failed */
1253 free(prog);
1254 free(argv2);
1255 }
1256 free_path_split(path);
1257 return pid;
1258}
1259
3e66e47b 1260int mingw_execv(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1261{
1262 /* check if git_command is a shell script */
3e66e47b 1263 if (!try_shell_exec(cmd, argv)) {
f1a4dfb8
JS		 1264 int pid, status;
1265
3e66e47b 1266 pid = mingw_spawnv(cmd, (const char **)argv, 0);
f1a4dfb8 1267 if (pid < 0)
570f1e6e 1268 return -1;
f1a4dfb8
JS		 1269 if (waitpid(pid, &status, 0) < 0)
1270 status = 255;
1271 exit(status);
1272 }
570f1e6e 1273 return -1;
f1a4dfb8
JS		 1274}
1275
1696d723 1276int mingw_execvp(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1277{
1278 char **path = get_path_split();
1279 char *prog = path_lookup(cmd, path, 0);
1280
1281 if (prog) {
3e66e47b 1282 mingw_execv(prog, argv);
f1a4dfb8
JS		 1283 free(prog);
1284 } else
1285 errno = ENOENT;
1286
1287 free_path_split(path);
1696d723 1288 return -1;
f1a4dfb8
JS		 1289}
1290
82fc07b7
EFL		 1291int mingw_kill(pid_t pid, int sig)
1292{
1293 if (pid > 0 && sig == SIGTERM) {
1294 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1295
1296 if (TerminateProcess(h, -1)) {
1297 CloseHandle(h);
1298 return 0;
1299 }
1300
1301 errno = err_win_to_posix(GetLastError());
1302 CloseHandle(h);
1303 return -1;
64a99eb4
NTND		 1304 } else if (pid > 0 && sig == 0) {
1305 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1306 if (h) {
1307 CloseHandle(h);
1308 return 0;
1309 }
82fc07b7
EFL		 1310 }
1311
1312 errno = EINVAL;
1313 return -1;
1314}
1315
343ff06d
KB		 1316/*
1317 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1318 */
1319static int compareenv(const void *v1, const void *v2)
1320{
1321 const char *e1 = *(const char**)v1;
1322 const char *e2 = *(const char**)v2;
1323
1324 for (;;) {
1325 int c1 = *e1++;
1326 int c2 = *e2++;
1327 c1 = (c1 == '=') ? 0 : tolower(c1);
1328 c2 = (c2 == '=') ? 0 : tolower(c2);
1329 if (c1 > c2)
1330 return 1;
1331 if (c1 < c2)
1332 return -1;
1333 if (c1 == 0)
1334 return 0;
1335 }
ba26f296
JS		 1336}
1337
343ff06d 1338static int bsearchenv(char **env, const char *name, size_t size)
ba26f296 1339{
343ff06d
KB		 1340 unsigned low = 0, high = size;
1341 while (low < high) {
1342 unsigned mid = low + ((high - low) >> 1);
1343 int cmp = compareenv(&env[mid], &name);
1344 if (cmp < 0)
1345 low = mid + 1;
1346 else if (cmp > 0)
1347 high = mid;
1348 else
1349 return mid;
ba26f296 1350 }
343ff06d 1351 return ~low; /* not found, return 1's complement of insert position */
ba26f296
JS		 1352}
1353
1354/*
1355 * If name contains '=', then sets the variable, otherwise it unsets it
f279242d
KB		 1356 * Size includes the terminating NULL. Env must have room for size + 1 entries
1357 * (in case of insert). Returns the new size. Optionally frees removed entries.
ba26f296 1358 */
f279242d 1359static int do_putenv(char **env, const char *name, int size, int free_old)
ba26f296 1360{
343ff06d 1361 int i = bsearchenv(env, name, size - 1);
ba26f296 1362
343ff06d
KB		 1363 /* optionally free removed / replaced entry */
1364 if (i >= 0 && free_old)
ba26f296 1365 free(env[i]);
ba26f296 1366
343ff06d
KB		 1367 if (strchr(name, '=')) {
1368 /* if new value ('key=value') is specified, insert or replace entry */
1369 if (i < 0) {
1370 i = ~i;
1371 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
f279242d 1372 size++;
ba26f296 1373 }
343ff06d
KB		 1374 env[i] = (char*) name;
1375 } else if (i >= 0) {
1376 /* otherwise ('key') remove existing entry */
1377 size--;
1378 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
ba26f296 1379 }
f279242d 1380 return size;
2affea41
JS		 1381}
1382
6dc71543 1383char *mingw_getenv(const char *name)
df599e96 1384{
343ff06d
KB		 1385 char *value;
1386 int pos = bsearchenv(environ, name, environ_size - 1);
1387 if (pos < 0)
1388 return NULL;
1389 value = strchr(environ[pos], '=');
1390 return value ? &value[1] : NULL;
df599e96
JS		 1391}
1392
b729f98f 1393int mingw_putenv(const char *namevalue)
06bc4b79 1394{
f279242d
KB		 1395 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1396 environ_size = do_putenv(environ, namevalue, environ_size, 1);
b729f98f 1397 return 0;
06bc4b79
JS		 1398}
1399
fe3b2b7b
MS		 1400/*
1401 * Note, this isn't a complete replacement for getaddrinfo. It assumes
0353a0c4 1402 * that service contains a numerical port, or that it is null. It
fe3b2b7b
MS		 1403 * does a simple search using gethostbyname, and returns one IPv4 host
1404 * if one was found.
1405 */
1406static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1407 const struct addrinfo *hints,
1408 struct addrinfo **res)
1409{
cbefd2d6 1410 struct hostent *h = NULL;
fe3b2b7b
MS		 1411 struct addrinfo *ai;
1412 struct sockaddr_in *sin;
1413
cbefd2d6
MS		 1414 if (node) {
1415 h = gethostbyname(node);
1416 if (!h)
1417 return WSAGetLastError();
1418 }
fe3b2b7b
MS		 1419
1420 ai = xmalloc(sizeof(struct addrinfo));
1421 *res = ai;
1422 ai->ai_flags = 0;
1423 ai->ai_family = AF_INET;
cbefd2d6
MS		 1424 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1425 switch (ai->ai_socktype) {
fe3b2b7b
MS		 1426 case SOCK_STREAM:
1427 ai->ai_protocol = IPPROTO_TCP;
1428 break;
1429 case SOCK_DGRAM:
1430 ai->ai_protocol = IPPROTO_UDP;
1431 break;
1432 default:
1433 ai->ai_protocol = 0;
1434 break;
1435 }
1436 ai->ai_addrlen = sizeof(struct sockaddr_in);
cbefd2d6 1437 if (hints && (hints->ai_flags & AI_CANONNAME))
040a6551 1438 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
cbefd2d6
MS		 1439 else
1440 ai->ai_canonname = NULL;
fe3b2b7b 1441
51a60f5b 1442 sin = xcalloc(1, ai->ai_addrlen);
fe3b2b7b 1443 sin->sin_family = AF_INET;
cbefd2d6
MS		 1444 /* Note: getaddrinfo is supposed to allow service to be a string,
1445 * which should be looked up using getservbyname. This is
1446 * currently not implemented */
fe3b2b7b
MS		 1447 if (service)
1448 sin->sin_port = htons(atoi(service));
cbefd2d6
MS		 1449 if (h)
1450 sin->sin_addr = *(struct in_addr *)h->h_addr;
1451 else if (hints && (hints->ai_flags & AI_PASSIVE))
1452 sin->sin_addr.s_addr = INADDR_ANY;
1453 else
1454 sin->sin_addr.s_addr = INADDR_LOOPBACK;
fe3b2b7b 1455 ai->ai_addr = (struct sockaddr *)sin;
657b35f4 1456 ai->ai_next = NULL;
fe3b2b7b
MS		 1457 return 0;
1458}
1459
1460static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1461{
1462 free(res->ai_canonname);
1463 free(res->ai_addr);
1464 free(res);
1465}
1466
1467static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1468 char *host, DWORD hostlen,
1469 char *serv, DWORD servlen, int flags)
1470{
1471 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1472 if (sa->sa_family != AF_INET)
1473 return EAI_FAMILY;
1474 if (!host && !serv)
1475 return EAI_NONAME;
1476
1477 if (host && hostlen > 0) {
1478 struct hostent *ent = NULL;
1479 if (!(flags & NI_NUMERICHOST))
1480 ent = gethostbyaddr((const char *)&sin->sin_addr,
1481 sizeof(sin->sin_addr), AF_INET);
1482
1483 if (ent)
1484 snprintf(host, hostlen, "%s", ent->h_name);
1485 else if (flags & NI_NAMEREQD)
1486 return EAI_NONAME;
1487 else
1488 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1489 }
1490
1491 if (serv && servlen > 0) {
1492 struct servent *ent = NULL;
1493 if (!(flags & NI_NUMERICSERV))
1494 ent = getservbyport(sin->sin_port,
1495 flags & NI_DGRAM ? "udp" : "tcp");
1496
1497 if (ent)
1498 snprintf(serv, servlen, "%s", ent->s_name);
1499 else
1500 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1501 }
1502
1503 return 0;
1504}
1505
1506static HMODULE ipv6_dll = NULL;
1507static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1508static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1509 const struct addrinfo *hints,
1510 struct addrinfo **res);
1511static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1512 char *host, DWORD hostlen,
1513 char *serv, DWORD servlen, int flags);
1514/*
1515 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1516 * don't need to try to load that one dynamically.
1517 */
1518
1519static void socket_cleanup(void)
1520{
1521 WSACleanup();
1522 if (ipv6_dll)
1523 FreeLibrary(ipv6_dll);
1524 ipv6_dll = NULL;
1525 ipv6_freeaddrinfo = freeaddrinfo_stub;
1526 ipv6_getaddrinfo = getaddrinfo_stub;
1527 ipv6_getnameinfo = getnameinfo_stub;
1528}
1529
b7cc9f82 1530static void ensure_socket_initialization(void)
746fb857
JS		 1531{
1532 WSADATA wsa;
b7cc9f82 1533 static int initialized = 0;
fe3b2b7b
MS		 1534 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1535 const char **name;
b7cc9f82
MS		 1536
1537 if (initialized)
1538 return;
746fb857
JS		 1539
1540 if (WSAStartup(MAKEWORD(2,2), &wsa))
1541 die("unable to initialize winsock subsystem, error %d",
1542 WSAGetLastError());
fe3b2b7b
MS		 1543
1544 for (name = libraries; *name; name++) {
1545 ipv6_dll = LoadLibrary(*name);
1546 if (!ipv6_dll)
1547 continue;
1548
1549 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1550 GetProcAddress(ipv6_dll, "freeaddrinfo");
1551 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1552 const struct addrinfo *,
1553 struct addrinfo **))
1554 GetProcAddress(ipv6_dll, "getaddrinfo");
1555 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1556 socklen_t, char *, DWORD,
1557 char *, DWORD, int))
1558 GetProcAddress(ipv6_dll, "getnameinfo");
1559 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1560 FreeLibrary(ipv6_dll);
1561 ipv6_dll = NULL;
1562 } else
1563 break;
1564 }
1565 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1566 ipv6_freeaddrinfo = freeaddrinfo_stub;
1567 ipv6_getaddrinfo = getaddrinfo_stub;
1568 ipv6_getnameinfo = getnameinfo_stub;
1569 }
1570
1571 atexit(socket_cleanup);
b7cc9f82
MS		 1572 initialized = 1;
1573}
1574
13d24b01
PT		 1575#undef gethostname
1576int mingw_gethostname(char *name, int namelen)
1577{
1578 ensure_socket_initialization();
1579 return gethostname(name, namelen);
1580}
1581
b7cc9f82
MS		 1582#undef gethostbyname
1583struct hostent *mingw_gethostbyname(const char *host)
1584{
1585 ensure_socket_initialization();
746fb857
JS		 1586 return gethostbyname(host);
1587}
1588
fe3b2b7b
MS		 1589void mingw_freeaddrinfo(struct addrinfo *res)
1590{
1591 ipv6_freeaddrinfo(res);
1592}
1593
1594int mingw_getaddrinfo(const char *node, const char *service,
1595 const struct addrinfo *hints, struct addrinfo **res)
1596{
1597 ensure_socket_initialization();
1598 return ipv6_getaddrinfo(node, service, hints, res);
1599}
1600
1601int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1602 char *host, DWORD hostlen, char *serv, DWORD servlen,
1603 int flags)
1604{
1605 ensure_socket_initialization();
1606 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1607}
1608
746fb857
JS		 1609int mingw_socket(int domain, int type, int protocol)
1610{
1611 int sockfd;
772991af
MP		 1612 SOCKET s;
1613
1614 ensure_socket_initialization();
1615 s = WSASocket(domain, type, protocol, NULL, 0, 0);
746fb857
JS		 1616 if (s == INVALID_SOCKET) {
1617 /*
1618 * WSAGetLastError() values are regular BSD error codes
1619 * biased by WSABASEERR.
1620 * However, strerror() does not know about networking
1621 * specific errors, which are values beginning at 38 or so.
1622 * Therefore, we choose to leave the biased error code
1623 * in errno so that _if_ someone looks up the code somewhere,
1624 * then it is at least the number that are usually listed.
1625 */
1626 errno = WSAGetLastError();
1627 return -1;
1628 }
1629 /* convert into a file descriptor */
1630 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1631 closesocket(s);
1632 return error("unable to make a socket file descriptor: %s",
1633 strerror(errno));
1634 }
1635 return sockfd;
1636}
1637
1638#undef connect
1639int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1640{
1641 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1642 return connect(s, sa, sz);
1643}
1644
772991af
MP		 1645#undef bind
1646int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1647{
1648 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1649 return bind(s, sa, sz);
1650}
1651
1652#undef setsockopt
1653int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1654{
1655 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1656 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1657}
1658
a7941795
JS		 1659#undef shutdown
1660int mingw_shutdown(int sockfd, int how)
1661{
1662 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1663 return shutdown(s, how);
1664}
1665
772991af
MP		 1666#undef listen
1667int mingw_listen(int sockfd, int backlog)
1668{
1669 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1670 return listen(s, backlog);
1671}
1672
1673#undef accept
1674int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1675{
1676 int sockfd2;
1677
1678 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1679 SOCKET s2 = accept(s1, sa, sz);
1680
1681 /* convert into a file descriptor */
1682 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1683 int err = errno;
1684 closesocket(s2);
1685 return error("unable to make a socket file descriptor: %s",
1686 strerror(err));
1687 }
1688 return sockfd2;
1689}
1690
ea9e98c3
JS		 1691#undef rename
1692int mingw_rename(const char *pold, const char *pnew)
1693{
6ac6f878
JS		 1694 DWORD attrs, gle;
1695 int tries = 0;
85faec9d
KB		 1696 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1697 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1698 return -1;
632f7017 1699
ea9e98c3
JS		 1700 /*
1701 * Try native rename() first to get errno right.
1702 * It is based on MoveFile(), which cannot overwrite existing files.
1703 */
85faec9d 1704 if (!_wrename(wpold, wpnew))
ea9e98c3
JS		 1705 return 0;
1706 if (errno != EEXIST)
1707 return -1;
6ac6f878 1708repeat:
85faec9d 1709 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
ea9e98c3
JS		 1710 return 0;
1711 /* TODO: translate more errors */
6ac6f878
JS		 1712 gle = GetLastError();
1713 if (gle == ERROR_ACCESS_DENIED &&
85faec9d 1714 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
632f7017 1715 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
4426fb51 1716 DWORD attrsold = GetFileAttributesW(wpold);
1717 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1718 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1719 errno = EISDIR;
1720 else if (!_wrmdir(wpnew))
1721 goto repeat;
ea9e98c3
JS		 1722 return -1;
1723 }
632f7017 1724 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
85faec9d
KB		 1725 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1726 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
632f7017 1727 return 0;
6ac6f878 1728 gle = GetLastError();
632f7017 1729 /* revert file attributes on failure */
85faec9d 1730 SetFileAttributesW(wpnew, attrs);
632f7017 1731 }
ea9e98c3 1732 }
6ac6f878
JS		 1733 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1734 /*
1735 * We assume that some other process had the source or
1736 * destination file open at the wrong moment and retry.
1737 * In order to give the other process a higher chance to
1738 * complete its operation, we give up our time slice now.
1739 * If we have to retry again, we do sleep a bit.
1740 */
1741 Sleep(delay[tries]);
1742 tries++;
1743 goto repeat;
1744 }
c9b78400
HV		 1745 if (gle == ERROR_ACCESS_DENIED &&
1746 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1747 "Should I try again?", pold, pnew))
1748 goto repeat;
1749
ea9e98c3
JS		 1750 errno = EACCES;
1751 return -1;
1752}
1753
b1b95204
RJ		 1754/*
1755 * Note that this doesn't return the actual pagesize, but
1756 * the allocation granularity. If future Windows specific git code
1757 * needs the real getpagesize function, we need to find another solution.
1758 */
1759int mingw_getpagesize(void)
1760{
1761 SYSTEM_INFO si;
1762 GetSystemInfo(&si);
1763 return si.dwAllocationGranularity;
1764}
1765
f4626df5
JS		 1766struct passwd *getpwuid(int uid)
1767{
f7597aca 1768 static char user_name[100];
f4626df5 1769 static struct passwd p;
f7597aca
JS		 1770
1771 DWORD len = sizeof(user_name);
1772 if (!GetUserName(user_name, &len))
1773 return NULL;
1774 p.pw_name = user_name;
1775 p.pw_gecos = "unknown";
1776 p.pw_dir = NULL;
f4626df5
JS		 1777 return &p;
1778}
1779
6072fc31
JS		 1780static HANDLE timer_event;
1781static HANDLE timer_thread;
1782static int timer_interval;
1783static int one_shot;
176478a8 1784static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
6072fc31
JS		 1785
1786/* The timer works like this:
1787 * The thread, ticktack(), is a trivial routine that most of the time
1788 * only waits to receive the signal to terminate. The main thread tells
1789 * the thread to terminate by setting the timer_event to the signalled
1790 * state.
1791 * But ticktack() interrupts the wait state after the timer's interval
1792 * length to call the signal handler.
1793 */
1794
d7fa500f 1795static unsigned __stdcall ticktack(void *dummy)
6072fc31
JS		 1796{
1797 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
176478a8 1798 mingw_raise(SIGALRM);
6072fc31
JS		 1799 if (one_shot)
1800 break;
1801 }
1802 return 0;
1803}
1804
1805static int start_timer_thread(void)
1806{
1807 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1808 if (timer_event) {
1809 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1810 if (!timer_thread )
1811 return errno = ENOMEM,
1812 error("cannot start timer thread");
1813 } else
1814 return errno = ENOMEM,
1815 error("cannot allocate resources for timer");
1816 return 0;
1817}
1818
1819static void stop_timer_thread(void)
1820{
1821 if (timer_event)
1822 SetEvent(timer_event); /* tell thread to terminate */
1823 if (timer_thread) {
1824 int rc = WaitForSingleObject(timer_thread, 1000);
1825 if (rc == WAIT_TIMEOUT)
1826 error("timer thread did not terminate timely");
1827 else if (rc != WAIT_OBJECT_0)
1828 error("waiting for timer thread failed: %lu",
1829 GetLastError());
1830 CloseHandle(timer_thread);
1831 }
1832 if (timer_event)
1833 CloseHandle(timer_event);
1834 timer_event = NULL;
1835 timer_thread = NULL;
1836}
1837
1838static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1839{
1840 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1841}
1842
f4626df5
JS		 1843int setitimer(int type, struct itimerval *in, struct itimerval *out)
1844{
6072fc31
JS		 1845 static const struct timeval zero;
1846 static int atexit_done;
1847
1848 if (out != NULL)
1849 return errno = EINVAL,
1850 error("setitimer param 3 != NULL not implemented");
1851 if (!is_timeval_eq(&in->it_interval, &zero) &&
1852 !is_timeval_eq(&in->it_interval, &in->it_value))
1853 return errno = EINVAL,
1854 error("setitimer: it_interval must be zero or eq it_value");
1855
1856 if (timer_thread)
1857 stop_timer_thread();
1858
1859 if (is_timeval_eq(&in->it_value, &zero) &&
1860 is_timeval_eq(&in->it_interval, &zero))
1861 return 0;
1862
1863 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1864 one_shot = is_timeval_eq(&in->it_interval, &zero);
1865 if (!atexit_done) {
1866 atexit(stop_timer_thread);
1867 atexit_done = 1;
1868 }
1869 return start_timer_thread();
f4626df5
JS		 1870}
1871
1872int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1873{
6072fc31
JS		 1874 if (sig != SIGALRM)
1875 return errno = EINVAL,
1876 error("sigaction only implemented for SIGALRM");
1877 if (out != NULL)
1878 return errno = EINVAL,
1879 error("sigaction: param 3 != NULL not implemented");
1880
1881 timer_fn = in->sa_handler;
1882 return 0;
1883}
1884
1885#undef signal
1886sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1887{
a4540658 1888 sig_handler_t old;
176478a8
EFL		 1889
1890 switch (sig) {
1891 case SIGALRM:
a4540658 1892 old = timer_fn;
176478a8
EFL		 1893 timer_fn = handler;
1894 break;
1895
1896 case SIGINT:
a4540658 1897 old = sigint_fn;
176478a8
EFL		 1898 sigint_fn = handler;
1899 break;
1900
1901 default:
6072fc31 1902 return signal(sig, handler);
176478a8
EFL		 1903 }
1904
6072fc31 1905 return old;
f4626df5 1906}
4804aabc 1907
176478a8
EFL		 1908#undef raise
1909int mingw_raise(int sig)
1910{
1911 switch (sig) {
1912 case SIGALRM:
1913 if (timer_fn == SIG_DFL) {
1914 if (isatty(STDERR_FILENO))
1915 fputs("Alarm clock\n", stderr);
1916 exit(128 + SIGALRM);
1917 } else if (timer_fn != SIG_IGN)
1918 timer_fn(SIGALRM);
1919 return 0;
1920
1921 case SIGINT:
1922 if (sigint_fn == SIG_DFL)
1923 exit(128 + SIGINT);
1924 else if (sigint_fn != SIG_IGN)
1925 sigint_fn(SIGINT);
1926 return 0;
1927
1928 default:
1929 return raise(sig);
1930 }
1931}
1932
7be401e0
PK		 1933int link(const char *oldpath, const char *newpath)
1934{
85faec9d 1935 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
7be401e0 1936 static T create_hard_link = NULL;
85faec9d
KB		 1937 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1938 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1939 xutftowcs_path(wnewpath, newpath) < 0)
1940 return -1;
1941
7be401e0
PK		 1942 if (!create_hard_link) {
1943 create_hard_link = (T) GetProcAddress(
85faec9d 1944 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
7be401e0
PK		 1945 if (!create_hard_link)
1946 create_hard_link = (T)-1;
1947 }
1948 if (create_hard_link == (T)-1) {
1949 errno = ENOSYS;
1950 return -1;
1951 }
85faec9d 1952 if (!create_hard_link(wnewpath, woldpath, NULL)) {
7be401e0
PK		 1953 errno = err_win_to_posix(GetLastError());
1954 return -1;
1955 }
1956 return 0;
1957}
0dbbbc1e 1958
956d86d1 1959pid_t waitpid(pid_t pid, int *status, int options)
52de4db5
EFL		 1960{
1961 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1962 FALSE, pid);
1963 if (!h) {
1964 errno = ECHILD;
1965 return -1;
1966 }
1967
ef7108ca
EFL		 1968 if (pid > 0 && options & WNOHANG) {
1969 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1970 CloseHandle(h);
1971 return 0;
1972 }
1973 options &= ~WNOHANG;
1974 }
1975
52de4db5
EFL		 1976 if (options == 0) {
1977 struct pinfo_t **ppinfo;
1978 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1979 CloseHandle(h);
1980 return 0;
1981 }
1982
1983 if (status)
1984 GetExitCodeProcess(h, (LPDWORD)status);
1985
1986 EnterCriticalSection(&pinfo_cs);
1987
1988 ppinfo = &pinfo;
1989 while (*ppinfo) {
1990 struct pinfo_t *info = *ppinfo;
1991 if (info->pid == pid) {
1992 CloseHandle(info->proc);
1993 *ppinfo = info->next;
1994 free(info);
1995 break;
1996 }
1997 ppinfo = &info->next;
1998 }
1999
2000 LeaveCriticalSection(&pinfo_cs);
2001
2002 CloseHandle(h);
2003 return pid;
2004 }
2005 CloseHandle(h);
2006
2007 errno = EINVAL;
2008 return -1;
2009}
c2369bdf 2010
e7d5ce81
JS		 2011int mingw_skip_dos_drive_prefix(char **path)
2012{
2013 int ret = has_dos_drive_prefix(*path);
2014 *path += ret;
2015 return ret;
2016}
2017
c2369bdf
CZ		 2018int mingw_offset_1st_component(const char *path)
2019{
2f36eed9 2020 char *pos = (char *)path;
c2369bdf
CZ		 2021
2022 /* unc paths */
2f36eed9
JS		 2023 if (!skip_dos_drive_prefix(&pos) &&
2024 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
c2369bdf 2025 /* skip server name */
2f36eed9 2026 pos = strpbrk(pos + 2, "\\/");
c2369bdf
CZ		 2027 if (!pos)
2028 return 0; /* Error: malformed unc path */
2029
2030 do {
2031 pos++;
2032 } while (*pos && !is_dir_sep(*pos));
c2369bdf
CZ		 2033 }
2034
2f36eed9 2035 return pos + is_dir_sep(*pos) - path;
c2369bdf 2036}
13f1df43 2037
1c950a59
KB		 2038int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2039{
2040 int upos = 0, wpos = 0;
2041 const unsigned char *utf = (const unsigned char*) utfs;
2042 if (!utf || !wcs || wcslen < 1) {
2043 errno = EINVAL;
2044 return -1;
2045 }
2046 /* reserve space for \0 */
2047 wcslen--;
2048 if (utflen < 0)
2049 utflen = INT_MAX;
2050
2051 while (upos < utflen) {
2052 int c = utf[upos++] & 0xff;
2053 if (utflen == INT_MAX && c == 0)
2054 break;
2055
2056 if (wpos >= wcslen) {
2057 wcs[wpos] = 0;
2058 errno = ERANGE;
2059 return -1;
2060 }
2061
2062 if (c < 0x80) {
2063 /* ASCII */
2064 wcs[wpos++] = c;
2065 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2066 (utf[upos] & 0xc0) == 0x80) {
2067 /* 2-byte utf-8 */
2068 c = ((c & 0x1f) << 6);
2069 c |= (utf[upos++] & 0x3f);
2070 wcs[wpos++] = c;
2071 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2072 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2073 (utf[upos] & 0xc0) == 0x80 &&
2074 (utf[upos + 1] & 0xc0) == 0x80) {
2075 /* 3-byte utf-8 */
2076 c = ((c & 0x0f) << 12);
2077 c |= ((utf[upos++] & 0x3f) << 6);
2078 c |= (utf[upos++] & 0x3f);
2079 wcs[wpos++] = c;
2080 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2081 wpos + 1 < wcslen &&
2082 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2083 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2084 (utf[upos] & 0xc0) == 0x80 &&
2085 (utf[upos + 1] & 0xc0) == 0x80 &&
2086 (utf[upos + 2] & 0xc0) == 0x80) {
2087 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2088 c = ((c & 0x07) << 18);
2089 c |= ((utf[upos++] & 0x3f) << 12);
2090 c |= ((utf[upos++] & 0x3f) << 6);
2091 c |= (utf[upos++] & 0x3f);
2092 c -= 0x10000;
2093 wcs[wpos++] = 0xd800 | (c >> 10);
2094 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2095 } else if (c >= 0xa0) {
2096 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2097 wcs[wpos++] = c;
2098 } else {
2099 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2100 static const char *hex = "0123456789abcdef";
2101 wcs[wpos++] = hex[c >> 4];
2102 if (wpos < wcslen)
2103 wcs[wpos++] = hex[c & 0x0f];
2104 }
2105 }
2106 wcs[wpos] = 0;
2107 return wpos;
2108}
2109
2110int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2111{
2112 if (!wcs || !utf || utflen < 1) {
2113 errno = EINVAL;
2114 return -1;
2115 }
2116 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2117 if (utflen)
2118 return utflen - 1;
2119 errno = ERANGE;
2120 return -1;
2121}
2122
0767172b 2123static void setup_windows_environment(void)
02e6edc0 2124{
1fc7bf79
JS		 2125 char *tmp = getenv("TMPDIR");
2126
02e6edc0 2127 /* on Windows it is TMP and TEMP */
1fc7bf79
JS		 2128 if (!tmp) {
2129 if (!(tmp = getenv("TMP")))
02e6edc0 2130 tmp = getenv("TEMP");
1fc7bf79 2131 if (tmp) {
02e6edc0 2132 setenv("TMPDIR", tmp, 1);
1fc7bf79
JS		 2133 tmp = getenv("TMPDIR");
2134 }
2135 }
2136
2137 if (tmp) {
2138 /*
2139 * Convert all dir separators to forward slashes,
2140 * to help shell commands called from the Git
2141 * executable (by not mistaking the dir separators
2142 * for escape characters).
2143 */
8e9b2080 2144 convert_slashes(tmp);
02e6edc0
KB		 2145 }
2146
2147 /* simulate TERM to enable auto-color (see color.c) */
2148 if (!getenv("TERM"))
2149 setenv("TERM", "cygwin", 1);
2150}
2151
5901dc66
KB		 2152/*
2153 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2154 * mingw startup code, see init.c in mingw runtime).
2155 */
2156int _CRT_glob = 0;
2157
3f046148
KB		 2158typedef struct {
2159 int newmode;
2160} _startupinfo;
2161
2162extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2163 _startupinfo *si);
2164
0767172b 2165static NORETURN void die_startup(void)
3f046148
KB		 2166{
2167 fputs("fatal: not enough memory for initialization", stderr);
2168 exit(128);
2169}
2170
6f1c189c
KB		 2171static void *malloc_startup(size_t size)
2172{
2173 void *result = malloc(size);
2174 if (!result)
2175 die_startup();
2176 return result;
2177}
2178
2179static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2180{
2181 len = xwcstoutf(buffer, wcs, len) + 1;
2182 return memcpy(malloc_startup(len), buffer, len);
2183}
2184
0767172b 2185void mingw_startup(void)
13f1df43 2186{
6f1c189c 2187 int i, maxlen, argc;
3f046148
KB		 2188 char *buffer;
2189 wchar_t **wenv, **wargv;
2190 _startupinfo si;
2191
2192 /* get wide char arguments and environment */
2193 si.newmode = 0;
2194 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2195 die_startup();
2196
2197 /* determine size of argv and environ conversion buffer */
2198 maxlen = wcslen(_wpgmptr);
2199 for (i = 1; i < argc; i++)
2200 maxlen = max(maxlen, wcslen(wargv[i]));
b729f98f
KB		 2201 for (i = 0; wenv[i]; i++)
2202 maxlen = max(maxlen, wcslen(wenv[i]));
2203
6f1c189c
KB		 2204 /*
2205 * nedmalloc can't free CRT memory, allocate resizable environment
2206 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2207 * use it while initializing the environment itself.
2208 */
f279242d 2209 environ_size = i + 1;
6f1c189c
KB		 2210 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2211 environ = malloc_startup(environ_alloc);
3f046148
KB		 2212
2213 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2214 maxlen = 3 * maxlen + 1;
6f1c189c 2215 buffer = malloc_startup(maxlen);
3f046148
KB		 2216
2217 /* convert command line arguments and environment to UTF-8 */
6f1c189c
KB		 2218 __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2219 for (i = 1; i < argc; i++)
2220 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2221 for (i = 0; wenv[i]; i++)
2222 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
f279242d 2223 environ[i] = NULL;
3f046148 2224 free(buffer);
13f1df43 2225
343ff06d
KB		 2226 /* sort environment for O(log n) getenv / putenv */
2227 qsort(environ, i, sizeof(char*), compareenv);
2228
6dc71543 2229 /* fix Windows specific environment settings */
02e6edc0 2230 setup_windows_environment();
baea068d 2231
13f1df43
KB		 2232 /* initialize critical section for waitpid pinfo_t list */
2233 InitializeCriticalSection(&pinfo_cs);
2234
2235 /* set up default file mode and file modes for stdin/out/err */
2236 _fmode = _O_BINARY;
2237 _setmode(_fileno(stdin), _O_BINARY);
2238 _setmode(_fileno(stdout), _O_BINARY);
2239 _setmode(_fileno(stderr), _O_BINARY);
eac14f89
KB		 2240
2241 /* initialize Unicode console */
2242 winansi_init();
13f1df43 2243}
7b6aff06
NTND		 2244
2245int uname(struct utsname *buf)
2246{
d62c89af 2247 unsigned v = (unsigned)GetVersion();
7b6aff06 2248 memset(buf, 0, sizeof(*buf));
5096d490
JK		 2249 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2250 xsnprintf(buf->release, sizeof(buf->release),
2251 "%u.%u", v & 0xff, (v >> 8) & 0xff);
7b6aff06 2252 /* assuming NT variants only.. */
5096d490
JK		 2253 xsnprintf(buf->version, sizeof(buf->version),
2254 "%u", (v >> 16) & 0x7fff);
7b6aff06
NTND		 2255 return 0;
2256}
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