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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
289int mingw_mkdir(const char *path, int mode)
290{
291 int ret;
292 wchar_t wpath[MAX_PATH];
293 if (xutftowcs_path(wpath, path) < 0)
294 return -1;
295 ret = _wmkdir(wpath);
4f288100
HV		 296 return ret;
297}
298
3e4a1ba0
JS		 299int mingw_open (const char *filename, int oflags, ...)
300{
301 va_list args;
302 unsigned mode;
0d30ad71 303 int fd;
85faec9d 304 wchar_t wfilename[MAX_PATH];
0d30ad71 305
3e4a1ba0
JS		 306 va_start(args, oflags);
307 mode = va_arg(args, int);
308 va_end(args);
309
1a404209 310 if (filename && !strcmp(filename, "/dev/null"))
3e4a1ba0 311 filename = "nul";
0d30ad71 312
85faec9d
KB		 313 if (xutftowcs_path(wfilename, filename) < 0)
314 return -1;
315 fd = _wopen(wfilename, oflags, mode);
0d30ad71 316
ba6fad02 317 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
85faec9d 318 DWORD attrs = GetFileAttributesW(wfilename);
3e4a1ba0
JS		 319 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
320 errno = EISDIR;
321 }
322 return fd;
323}
324
176478a8
EFL		 325static BOOL WINAPI ctrl_ignore(DWORD type)
326{
327 return TRUE;
328}
329
330#undef fgetc
331int mingw_fgetc(FILE *stream)
332{
333 int ch;
334 if (!isatty(_fileno(stream)))
335 return fgetc(stream);
336
337 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
338 while (1) {
339 ch = fgetc(stream);
340 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
341 break;
342
343 /* Ctrl+C was pressed, simulate SIGINT and retry */
344 mingw_raise(SIGINT);
345 }
346 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
347 return ch;
348}
349
3fdcdbdf
JS		 350#undef fopen
351FILE *mingw_fopen (const char *filename, const char *otype)
352{
85faec9d
KB		 353 FILE *file;
354 wchar_t wfilename[MAX_PATH], wotype[4];
1a404209 355 if (filename && !strcmp(filename, "/dev/null"))
3fdcdbdf 356 filename = "nul";
85faec9d
KB		 357 if (xutftowcs_path(wfilename, filename) < 0 ||
358 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
359 return NULL;
360 file = _wfopen(wfilename, wotype);
361 return file;
3fdcdbdf
JS		 362}
363
3fdcdbdf
JS		 364FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
365{
85faec9d
KB		 366 FILE *file;
367 wchar_t wfilename[MAX_PATH], wotype[4];
3fdcdbdf
JS		 368 if (filename && !strcmp(filename, "/dev/null"))
369 filename = "nul";
85faec9d
KB		 370 if (xutftowcs_path(wfilename, filename) < 0 ||
371 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
372 return NULL;
373 file = _wfreopen(wfilename, wotype, stream);
374 return file;
3fdcdbdf
JS		 375}
376
84adb641
JS		 377#undef fflush
378int mingw_fflush(FILE *stream)
379{
380 int ret = fflush(stream);
381
382 /*
383 * write() is used behind the scenes of stdio output functions.
384 * Since git code does not check for errors after each stdio write
385 * operation, it can happen that write() is called by a later
386 * stdio function even if an earlier write() call failed. In the
387 * case of a pipe whose readable end was closed, only the first
388 * call to write() reports EPIPE on Windows. Subsequent write()
389 * calls report EINVAL. It is impossible to notice whether this
390 * fflush invocation triggered such a case, therefore, we have to
391 * catch all EINVAL errors whole-sale.
392 */
393 if (ret && errno == EINVAL)
394 errno = EPIPE;
395
396 return ret;
397}
398
2b86292e
JS		 399#undef write
400ssize_t mingw_write(int fd, const void *buf, size_t len)
401{
402 ssize_t result = write(fd, buf, len);
403
404 if (result < 0 && errno == EINVAL && buf) {
405 /* check if fd is a pipe */
406 HANDLE h = (HANDLE) _get_osfhandle(fd);
407 if (GetFileType(h) == FILE_TYPE_PIPE)
408 errno = EPIPE;
409 else
410 errno = EINVAL;
411 }
412
413 return result;
414}
415
85faec9d
KB		 416int mingw_access(const char *filename, int mode)
417{
418 wchar_t wfilename[MAX_PATH];
419 if (xutftowcs_path(wfilename, filename) < 0)
420 return -1;
421 /* X_OK is not supported by the MSVCRT version */
422 return _waccess(wfilename, mode & ~X_OK);
423}
424
425int mingw_chdir(const char *dirname)
426{
427 wchar_t wdirname[MAX_PATH];
428 if (xutftowcs_path(wdirname, dirname) < 0)
429 return -1;
430 return _wchdir(wdirname);
431}
432
433int mingw_chmod(const char *filename, int mode)
434{
435 wchar_t wfilename[MAX_PATH];
436 if (xutftowcs_path(wfilename, filename) < 0)
437 return -1;
438 return _wchmod(wfilename, mode);
439}
440
a6d15bc3
JS		 441/*
442 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
443 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
444 */
445static inline long long filetime_to_hnsec(const FILETIME *ft)
5411bdc4
MSO		 446{
447 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
a6d15bc3
JS		 448 /* Windows to Unix Epoch conversion */
449 return winTime - 116444736000000000LL;
450}
451
452static inline time_t filetime_to_time_t(const FILETIME *ft)
453{
454 return (time_t)(filetime_to_hnsec(ft) / 10000000);
5411bdc4
MSO		 455}
456
4b0abd5c
JS		 457/**
458 * Verifies that safe_create_leading_directories() would succeed.
459 */
460static int has_valid_directory_prefix(wchar_t *wfilename)
461{
462 int n = wcslen(wfilename);
463
464 while (n > 0) {
465 wchar_t c = wfilename[--n];
466 DWORD attributes;
467
468 if (!is_dir_sep(c))
469 continue;
470
471 wfilename[n] = L'\0';
472 attributes = GetFileAttributesW(wfilename);
473 wfilename[n] = c;
474 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
475 attributes == FILE_ATTRIBUTE_DEVICE)
476 return 1;
477 if (attributes == INVALID_FILE_ATTRIBUTES)
478 switch (GetLastError()) {
479 case ERROR_PATH_NOT_FOUND:
480 continue;
481 case ERROR_FILE_NOT_FOUND:
482 /* This implies parent directory exists. */
483 return 1;
484 }
485 return 0;
486 }
487 return 1;
488}
489
5411bdc4
MSO		 490/* We keep the do_lstat code in a separate function to avoid recursion.
491 * When a path ends with a slash, the stat will fail with ENOENT. In
492 * this case, we strip the trailing slashes and stat again.
9b9784ca
PT		 493 *
494 * If follow is true then act like stat() and report on the link
495 * target. Otherwise report on the link itself.
5411bdc4 496 */
9b9784ca 497static int do_lstat(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 498{
499 WIN32_FILE_ATTRIBUTE_DATA fdata;
85faec9d
KB		 500 wchar_t wfilename[MAX_PATH];
501 if (xutftowcs_path(wfilename, file_name) < 0)
502 return -1;
5411bdc4 503
85faec9d 504 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
5411bdc4
MSO		 505 buf->st_ino = 0;
506 buf->st_gid = 0;
507 buf->st_uid = 0;
180964f0 508 buf->st_nlink = 1;
444dc903 509 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 510 buf->st_size = fdata.nFileSizeLow |
511 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 512 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
5411bdc4
MSO		 513 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
514 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
515 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
9b9784ca 516 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
85faec9d
KB		 517 WIN32_FIND_DATAW findbuf;
518 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
9b9784ca
PT		 519 if (handle != INVALID_HANDLE_VALUE) {
520 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
521 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
522 if (follow) {
523 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
524 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
525 } else {
526 buf->st_mode = S_IFLNK;
527 }
528 buf->st_mode |= S_IREAD;
529 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
530 buf->st_mode |= S_IWRITE;
531 }
532 FindClose(handle);
533 }
534 }
5411bdc4
MSO		 535 return 0;
536 }
85faec9d
KB		 537 switch (GetLastError()) {
538 case ERROR_ACCESS_DENIED:
539 case ERROR_SHARING_VIOLATION:
540 case ERROR_LOCK_VIOLATION:
541 case ERROR_SHARING_BUFFER_EXCEEDED:
542 errno = EACCES;
543 break;
544 case ERROR_BUFFER_OVERFLOW:
545 errno = ENAMETOOLONG;
546 break;
547 case ERROR_NOT_ENOUGH_MEMORY:
548 errno = ENOMEM;
549 break;
4b0abd5c
JS		 550 case ERROR_PATH_NOT_FOUND:
551 if (!has_valid_directory_prefix(wfilename)) {
552 errno = ENOTDIR;
553 break;
554 }
555 /* fallthru */
85faec9d
KB		 556 default:
557 errno = ENOENT;
558 break;
559 }
5411bdc4
MSO		 560 return -1;
561}
562
563/* We provide our own lstat/fstat functions, since the provided
564 * lstat/fstat functions are so slow. These stat functions are
565 * tailored for Git's usage (read: fast), and are not meant to be
566 * complete. Note that Git stat()s are redirected to mingw_lstat()
567 * too, since Windows doesn't really handle symlinks that well.
568 */
9b9784ca 569static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
5411bdc4
MSO		 570{
571 int namelen;
58aa3d2a 572 char alt_name[PATH_MAX];
5411bdc4 573
9b9784ca 574 if (!do_lstat(follow, file_name, buf))
5411bdc4
MSO		 575 return 0;
576
577 /* if file_name ended in a '/', Windows returned ENOENT;
578 * try again without trailing slashes
579 */
580 if (errno != ENOENT)
581 return -1;
582
583 namelen = strlen(file_name);
584 if (namelen && file_name[namelen-1] != '/')
585 return -1;
586 while (namelen && file_name[namelen-1] == '/')
587 --namelen;
588 if (!namelen || namelen >= PATH_MAX)
589 return -1;
590
591 memcpy(alt_name, file_name, namelen);
592 alt_name[namelen] = 0;
9b9784ca
PT		 593 return do_lstat(follow, alt_name, buf);
594}
595
596int mingw_lstat(const char *file_name, struct stat *buf)
597{
598 return do_stat_internal(0, file_name, buf);
599}
600int mingw_stat(const char *file_name, struct stat *buf)
601{
602 return do_stat_internal(1, file_name, buf);
5411bdc4
MSO		 603}
604
180964f0 605int mingw_fstat(int fd, struct stat *buf)
5411bdc4
MSO		 606{
607 HANDLE fh = (HANDLE)_get_osfhandle(fd);
608 BY_HANDLE_FILE_INFORMATION fdata;
609
610 if (fh == INVALID_HANDLE_VALUE) {
611 errno = EBADF;
612 return -1;
613 }
614 /* direct non-file handles to MS's fstat() */
180964f0 615 if (GetFileType(fh) != FILE_TYPE_DISK)
1d4e4cd4 616 return _fstati64(fd, buf);
5411bdc4
MSO		 617
618 if (GetFileInformationByHandle(fh, &fdata)) {
5411bdc4
MSO		 619 buf->st_ino = 0;
620 buf->st_gid = 0;
621 buf->st_uid = 0;
180964f0 622 buf->st_nlink = 1;
444dc903 623 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
1d4e4cd4
JS		 624 buf->st_size = fdata.nFileSizeLow |
625 (((off_t)fdata.nFileSizeHigh)<<32);
8252df62 626 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
5411bdc4
MSO		 627 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
628 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
629 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
630 return 0;
631 }
632 errno = EBADF;
633 return -1;
634}
635
7c0ffa1c
JS		 636static inline void time_t_to_filetime(time_t t, FILETIME *ft)
637{
638 long long winTime = t * 10000000LL + 116444736000000000LL;
639 ft->dwLowDateTime = winTime;
640 ft->dwHighDateTime = winTime >> 32;
641}
642
643int mingw_utime (const char *file_name, const struct utimbuf *times)
644{
645 FILETIME mft, aft;
646 int fh, rc;
85faec9d
KB		 647 DWORD attrs;
648 wchar_t wfilename[MAX_PATH];
649 if (xutftowcs_path(wfilename, file_name) < 0)
650 return -1;
7c0ffa1c
JS		 651
652 /* must have write permission */
85faec9d 653 attrs = GetFileAttributesW(wfilename);
852f098c
JS		 654 if (attrs != INVALID_FILE_ATTRIBUTES &&
655 (attrs & FILE_ATTRIBUTE_READONLY)) {
656 /* ignore errors here; open() will report them */
85faec9d 657 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
852f098c
JS		 658 }
659
85faec9d 660 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
852f098c
JS		 661 rc = -1;
662 goto revert_attrs;
663 }
7c0ffa1c 664
ded2d476
SG		 665 if (times) {
666 time_t_to_filetime(times->modtime, &mft);
667 time_t_to_filetime(times->actime, &aft);
668 } else {
669 GetSystemTimeAsFileTime(&mft);
670 aft = mft;
671 }
7c0ffa1c
JS		 672 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
673 errno = EINVAL;
674 rc = -1;
675 } else
676 rc = 0;
677 close(fh);
852f098c
JS		 678
679revert_attrs:
680 if (attrs != INVALID_FILE_ATTRIBUTES &&
681 (attrs & FILE_ATTRIBUTE_READONLY)) {
682 /* ignore errors again */
85faec9d 683 SetFileAttributesW(wfilename, attrs);
852f098c 684 }
7c0ffa1c
JS		 685 return rc;
686}
687
f4626df5
JS		 688unsigned int sleep (unsigned int seconds)
689{
690 Sleep(seconds*1000);
691 return 0;
692}
693
85faec9d
KB		 694char *mingw_mktemp(char *template)
695{
696 wchar_t wtemplate[MAX_PATH];
697 if (xutftowcs_path(wtemplate, template) < 0)
698 return NULL;
699 if (!_wmktemp(wtemplate))
700 return NULL;
701 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
702 return NULL;
703 return template;
704}
705
f4626df5
JS		 706int mkstemp(char *template)
707{
708 char *filename = mktemp(template);
709 if (filename == NULL)
710 return -1;
711 return open(filename, O_RDWR | O_CREAT, 0600);
712}
713
714int gettimeofday(struct timeval *tv, void *tz)
715{
a6d15bc3
JS		 716 FILETIME ft;
717 long long hnsec;
718
719 GetSystemTimeAsFileTime(&ft);
720 hnsec = filetime_to_hnsec(&ft);
721 tv->tv_sec = hnsec / 10000000;
722 tv->tv_usec = (hnsec % 10000000) / 10;
a42a0c2e 723 return 0;
f4626df5
JS		 724}
725
897bb8cb
JS		 726int pipe(int filedes[2])
727{
3e34d665 728 HANDLE h[2];
897bb8cb 729
3e34d665
JS		 730 /* this creates non-inheritable handles */
731 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
732 errno = err_win_to_posix(GetLastError());
897bb8cb
JS		 733 return -1;
734 }
7c00bc39 735 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
3e34d665 736 if (filedes[0] < 0) {
897bb8cb
JS		 737 CloseHandle(h[0]);
738 CloseHandle(h[1]);
739 return -1;
740 }
7c00bc39 741 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
c3cb7b6f 742 if (filedes[1] < 0) {
897bb8cb 743 close(filedes[0]);
897bb8cb
JS		 744 CloseHandle(h[1]);
745 return -1;
746 }
897bb8cb
JS		 747 return 0;
748}
749
f4626df5
JS		 750struct tm *gmtime_r(const time_t *timep, struct tm *result)
751{
752 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
753 memcpy(result, gmtime(timep), sizeof(struct tm));
754 return result;
755}
756
757struct tm *localtime_r(const time_t *timep, struct tm *result)
758{
759 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
760 memcpy(result, localtime(timep), sizeof(struct tm));
761 return result;
762}
763
25fe217b
JS		 764char *mingw_getcwd(char *pointer, int len)
765{
766 int i;
85faec9d
KB		 767 wchar_t wpointer[MAX_PATH];
768 if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
769 return NULL;
770 if (xwcstoutf(pointer, wpointer, len) < 0)
771 return NULL;
25fe217b
JS		 772 for (i = 0; pointer[i]; i++)
773 if (pointer[i] == '\\')
774 pointer[i] = '/';
85faec9d 775 return pointer;
25fe217b
JS		 776}
777
7e5d7768
JS		 778/*
779 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
780 * (Parsing C++ Command-Line Arguments)
781 */
782static const char *quote_arg(const char *arg)
783{
784 /* count chars to quote */
785 int len = 0, n = 0;
786 int force_quotes = 0;
787 char *q, *d;
788 const char *p = arg;
789 if (!*p) force_quotes = 1;
790 while (*p) {
3aea1a5a 791 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
7e5d7768
JS		 792 force_quotes = 1;
793 else if (*p == '"')
794 n++;
795 else if (*p == '\\') {
796 int count = 0;
797 while (*p == '\\') {
798 count++;
799 p++;
800 len++;
801 }
802 if (*p == '"')
803 n += count*2 + 1;
804 continue;
805 }
806 len++;
807 p++;
808 }
809 if (!force_quotes && n == 0)
810 return arg;
811
812 /* insert \ where necessary */
50a6c8ef 813 d = q = xmalloc(st_add3(len, n, 3));
7e5d7768
JS		 814 *d++ = '"';
815 while (*arg) {
816 if (*arg == '"')
817 *d++ = '\\';
818 else if (*arg == '\\') {
819 int count = 0;
820 while (*arg == '\\') {
821 count++;
822 *d++ = *arg++;
823 }
824 if (*arg == '"') {
825 while (count-- > 0)
826 *d++ = '\\';
827 *d++ = '\\';
828 }
829 }
830 *d++ = *arg++;
831 }
832 *d++ = '"';
833 *d++ = 0;
834 return q;
835}
836
f1a4dfb8
JS		 837static const char *parse_interpreter(const char *cmd)
838{
839 static char buf[100];
840 char *p, *opt;
841 int n, fd;
842
843 /* don't even try a .exe */
844 n = strlen(cmd);
845 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
846 return NULL;
847
848 fd = open(cmd, O_RDONLY);
849 if (fd < 0)
850 return NULL;
851 n = read(fd, buf, sizeof(buf)-1);
852 close(fd);
853 if (n < 4) /* at least '#!/x' and not error */
854 return NULL;
855
856 if (buf[0] != '#' || buf[1] != '!')
857 return NULL;
858 buf[n] = '\0';
bedc4279
PH		 859 p = buf + strcspn(buf, "\r\n");
860 if (!*p)
f1a4dfb8
JS		 861 return NULL;
862
863 *p = '\0';
864 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
865 return NULL;
866 /* strip options */
867 if ((opt = strchr(p+1, ' ')))
868 *opt = '\0';
869 return p+1;
870}
871
872/*
873 * Splits the PATH into parts.
874 */
875static char **get_path_split(void)
876{
06bc4b79 877 char *p, **path, *envpath = mingw_getenv("PATH");
f1a4dfb8
JS		 878 int i, n = 0;
879
880 if (!envpath || !*envpath)
881 return NULL;
882
883 envpath = xstrdup(envpath);
884 p = envpath;
885 while (p) {
886 char *dir = p;
887 p = strchr(p, ';');
888 if (p) *p++ = '\0';
889 if (*dir) { /* not earlier, catches series of ; */
890 ++n;
891 }
892 }
893 if (!n)
894 return NULL;
895
b32fa95f 896 ALLOC_ARRAY(path, n + 1);
f1a4dfb8
JS		 897 p = envpath;
898 i = 0;
899 do {
900 if (*p)
901 path[i++] = xstrdup(p);
902 p = p+strlen(p)+1;
903 } while (i < n);
904 path[i] = NULL;
905
906 free(envpath);
907
908 return path;
909}
910
911static void free_path_split(char **path)
912{
0d30ad71
FL		 913 char **p = path;
914
f1a4dfb8
JS		 915 if (!path)
916 return;
917
f1a4dfb8
JS		 918 while (*p)
919 free(*p++);
920 free(path);
921}
922
923/*
924 * exe_only means that we only want to detect .exe files, but not scripts
925 * (which do not have an extension)
926 */
927static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
928{
929 char path[MAX_PATH];
930 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
931
932 if (!isexe && access(path, F_OK) == 0)
933 return xstrdup(path);
934 path[strlen(path)-4] = '\0';
935 if ((!exe_only || isexe) && access(path, F_OK) == 0)
fe77b695
ER		 936 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
937 return xstrdup(path);
f1a4dfb8
JS		 938 return NULL;
939}
940
941/*
22e5e58a 942 * Determines the absolute path of cmd using the split path in path.
f1a4dfb8
JS		 943 * If cmd contains a slash or backslash, no lookup is performed.
944 */
945static char *path_lookup(const char *cmd, char **path, int exe_only)
946{
947 char *prog = NULL;
948 int len = strlen(cmd);
949 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
950
951 if (strchr(cmd, '/') || strchr(cmd, '\\'))
952 prog = xstrdup(cmd);
953
954 while (!prog && *path)
955 prog = lookup_prog(*path++, cmd, isexe, exe_only);
956
957 return prog;
958}
959
f279242d
KB		 960static int do_putenv(char **env, const char *name, int size, int free_old);
961
962/* used number of elements of environ array, including terminating NULL */
963static int environ_size = 0;
964/* allocated size of environ array, in bytes */
965static int environ_alloc = 0;
77734da2 966
df0e998c 967/*
77734da2
KB		 968 * Create environment block suitable for CreateProcess. Merges current
969 * process environment and the supplied environment changes.
df0e998c 970 */
77734da2 971static wchar_t *make_environment_block(char **deltaenv)
7e5d7768 972{
df0e998c 973 wchar_t *wenvblk = NULL;
f279242d
KB		 974 char **tmpenv;
975 int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
df0e998c 976
f279242d
KB		 977 while (deltaenv && deltaenv[i])
978 i++;
df0e998c 979
f279242d 980 /* copy the environment, leaving space for changes */
b32fa95f 981 ALLOC_ARRAY(tmpenv, size + i);
f279242d 982 memcpy(tmpenv, environ, size * sizeof(char*));
77734da2
KB		 983
984 /* merge supplied environment changes into the temporary environment */
f279242d
KB		 985 for (i = 0; deltaenv && deltaenv[i]; i++)
986 size = do_putenv(tmpenv, deltaenv[i], size, 0);
77734da2 987
df0e998c 988 /* create environment block from temporary environment */
f279242d
KB		 989 for (i = 0; tmpenv[i]; i++) {
990 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
df0e998c 991 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
f279242d 992 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
df0e998c
KB		 993 }
994 /* add final \0 terminator */
995 wenvblk[wenvpos] = 0;
996 free(tmpenv);
997 return wenvblk;
7e5d7768
JS		 998}
999
52de4db5
EFL		 1000struct pinfo_t {
1001 struct pinfo_t *next;
1002 pid_t pid;
1003 HANDLE proc;
657b35f4
RJ		 1004};
1005static struct pinfo_t *pinfo = NULL;
52de4db5
EFL		 1006CRITICAL_SECTION pinfo_cs;
1007
77734da2 1008static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1009 const char *dir,
75301f90 1010 int prepend_cmd, int fhin, int fhout, int fherr)
7e5d7768 1011{
99c3c76d 1012 STARTUPINFOW si;
7e5d7768 1013 PROCESS_INFORMATION pi;
7eb2619c
KB		 1014 struct strbuf args;
1015 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1016 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
7e5d7768
JS		 1017 BOOL ret;
1018
1019 /* Determine whether or not we are associated to a console */
1020 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1021 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1022 FILE_ATTRIBUTE_NORMAL, NULL);
1023 if (cons == INVALID_HANDLE_VALUE) {
1024 /* There is no console associated with this process.
1025 * Since the child is a console process, Windows
1026 * would normally create a console window. But
1027 * since we'll be redirecting std streams, we do
1028 * not need the console.
19fb896f
AG		 1029 * It is necessary to use DETACHED_PROCESS
1030 * instead of CREATE_NO_WINDOW to make ssh
1031 * recognize that it has no console.
7e5d7768 1032 */
7eb2619c 1033 flags |= DETACHED_PROCESS;
7e5d7768
JS		 1034 } else {
1035 /* There is already a console. If we specified
19fb896f 1036 * DETACHED_PROCESS here, too, Windows would
7e5d7768 1037 * disassociate the child from the console.
19fb896f 1038 * The same is true for CREATE_NO_WINDOW.
7e5d7768
JS		 1039 * Go figure!
1040 */
7e5d7768
JS		 1041 CloseHandle(cons);
1042 }
1043 memset(&si, 0, sizeof(si));
1044 si.cb = sizeof(si);
1045 si.dwFlags = STARTF_USESTDHANDLES;
eac14f89
KB		 1046 si.hStdInput = winansi_get_osfhandle(fhin);
1047 si.hStdOutput = winansi_get_osfhandle(fhout);
1048 si.hStdError = winansi_get_osfhandle(fherr);
7e5d7768 1049
99c3c76d
KB		 1050 if (xutftowcs_path(wcmd, cmd) < 0)
1051 return -1;
1052 if (dir && xutftowcs_path(wdir, dir) < 0)
1053 return -1;
1054
7e5d7768
JS		 1055 /* concatenate argv, quoting args as we go */
1056 strbuf_init(&args, 0);
1057 if (prepend_cmd) {
1058 char *quoted = (char *)quote_arg(cmd);
1059 strbuf_addstr(&args, quoted);
1060 if (quoted != cmd)
1061 free(quoted);
1062 }
1063 for (; *argv; argv++) {
1064 char *quoted = (char *)quote_arg(*argv);
1065 if (*args.buf)
1066 strbuf_addch(&args, ' ');
1067 strbuf_addstr(&args, quoted);
1068 if (quoted != *argv)
1069 free(quoted);
1070 }
1071
8d5b3325 1072 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
99c3c76d
KB		 1073 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1074 strbuf_release(&args);
1075
77734da2 1076 wenvblk = make_environment_block(deltaenv);
7e5d7768
JS		 1077
1078 memset(&pi, 0, sizeof(pi));
99c3c76d 1079 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
7eb2619c 1080 wenvblk, dir ? wdir : NULL, &si, &pi);
7e5d7768 1081
7eb2619c 1082 free(wenvblk);
99c3c76d 1083 free(wargs);
7e5d7768
JS		 1084
1085 if (!ret) {
1086 errno = ENOENT;
1087 return -1;
1088 }
1089 CloseHandle(pi.hThread);
52de4db5
EFL		 1090
1091 /*
1092 * The process ID is the human-readable identifier of the process
1093 * that we want to present in log and error messages. The handle
1094 * is not useful for this purpose. But we cannot close it, either,
1095 * because it is not possible to turn a process ID into a process
1096 * handle after the process terminated.
1097 * Keep the handle in a list for waitpid.
1098 */
1099 EnterCriticalSection(&pinfo_cs);
1100 {
1101 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1102 info->pid = pi.dwProcessId;
1103 info->proc = pi.hProcess;
1104 info->next = pinfo;
1105 pinfo = info;
1106 }
1107 LeaveCriticalSection(&pinfo_cs);
1108
1109 return (pid_t)pi.dwProcessId;
7e5d7768
JS		 1110}
1111
3e66e47b 1112static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
75301f90 1113{
77734da2 1114 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
75301f90
JS		 1115}
1116
77734da2 1117pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
f9a2743c 1118 const char *dir,
75301f90 1119 int fhin, int fhout, int fherr)
7e5d7768
JS		 1120{
1121 pid_t pid;
1122 char **path = get_path_split();
1123 char *prog = path_lookup(cmd, path, 0);
1124
1125 if (!prog) {
1126 errno = ENOENT;
1127 pid = -1;
1128 }
1129 else {
1130 const char *interpr = parse_interpreter(prog);
1131
1132 if (interpr) {
1133 const char *argv0 = argv[0];
1134 char *iprog = path_lookup(interpr, path, 1);
1135 argv[0] = prog;
1136 if (!iprog) {
1137 errno = ENOENT;
1138 pid = -1;
1139 }
1140 else {
77734da2 1141 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
75301f90 1142 fhin, fhout, fherr);
7e5d7768
JS		 1143 free(iprog);
1144 }
1145 argv[0] = argv0;
1146 }
1147 else
77734da2 1148 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
75301f90 1149 fhin, fhout, fherr);
7e5d7768
JS		 1150 free(prog);
1151 }
1152 free_path_split(path);
1153 return pid;
1154}
1155
3e66e47b 1156static int try_shell_exec(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1157{
1158 const char *interpr = parse_interpreter(cmd);
1159 char **path;
1160 char *prog;
1161 int pid = 0;
1162
1163 if (!interpr)
1164 return 0;
1165 path = get_path_split();
1166 prog = path_lookup(interpr, path, 1);
1167 if (prog) {
1168 int argc = 0;
1169 const char **argv2;
1170 while (argv[argc]) argc++;
b32fa95f 1171 ALLOC_ARRAY(argv2, argc + 1);
7e5d7768
JS		 1172 argv2[0] = (char *)cmd; /* full path to the script file */
1173 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
3e66e47b 1174 pid = mingw_spawnv(prog, argv2, 1);
f1a4dfb8
JS		 1175 if (pid >= 0) {
1176 int status;
1177 if (waitpid(pid, &status, 0) < 0)
1178 status = 255;
1179 exit(status);
1180 }
1181 pid = 1; /* indicate that we tried but failed */
1182 free(prog);
1183 free(argv2);
1184 }
1185 free_path_split(path);
1186 return pid;
1187}
1188
3e66e47b 1189int mingw_execv(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1190{
1191 /* check if git_command is a shell script */
3e66e47b 1192 if (!try_shell_exec(cmd, argv)) {
f1a4dfb8
JS		 1193 int pid, status;
1194
3e66e47b 1195 pid = mingw_spawnv(cmd, (const char **)argv, 0);
f1a4dfb8 1196 if (pid < 0)
570f1e6e 1197 return -1;
f1a4dfb8
JS		 1198 if (waitpid(pid, &status, 0) < 0)
1199 status = 255;
1200 exit(status);
1201 }
570f1e6e 1202 return -1;
f1a4dfb8
JS		 1203}
1204
1696d723 1205int mingw_execvp(const char *cmd, char *const *argv)
f1a4dfb8
JS		 1206{
1207 char **path = get_path_split();
1208 char *prog = path_lookup(cmd, path, 0);
1209
1210 if (prog) {
3e66e47b 1211 mingw_execv(prog, argv);
f1a4dfb8
JS		 1212 free(prog);
1213 } else
1214 errno = ENOENT;
1215
1216 free_path_split(path);
1696d723 1217 return -1;
f1a4dfb8
JS		 1218}
1219
82fc07b7
EFL		 1220int mingw_kill(pid_t pid, int sig)
1221{
1222 if (pid > 0 && sig == SIGTERM) {
1223 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1224
1225 if (TerminateProcess(h, -1)) {
1226 CloseHandle(h);
1227 return 0;
1228 }
1229
1230 errno = err_win_to_posix(GetLastError());
1231 CloseHandle(h);
1232 return -1;
64a99eb4
NTND		 1233 } else if (pid > 0 && sig == 0) {
1234 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1235 if (h) {
1236 CloseHandle(h);
1237 return 0;
1238 }
82fc07b7
EFL		 1239 }
1240
1241 errno = EINVAL;
1242 return -1;
1243}
1244
343ff06d
KB		 1245/*
1246 * Compare environment entries by key (i.e. stopping at '=' or '\0').
1247 */
1248static int compareenv(const void *v1, const void *v2)
1249{
1250 const char *e1 = *(const char**)v1;
1251 const char *e2 = *(const char**)v2;
1252
1253 for (;;) {
1254 int c1 = *e1++;
1255 int c2 = *e2++;
1256 c1 = (c1 == '=') ? 0 : tolower(c1);
1257 c2 = (c2 == '=') ? 0 : tolower(c2);
1258 if (c1 > c2)
1259 return 1;
1260 if (c1 < c2)
1261 return -1;
1262 if (c1 == 0)
1263 return 0;
1264 }
ba26f296
JS		 1265}
1266
343ff06d 1267static int bsearchenv(char **env, const char *name, size_t size)
ba26f296 1268{
343ff06d
KB		 1269 unsigned low = 0, high = size;
1270 while (low < high) {
1271 unsigned mid = low + ((high - low) >> 1);
1272 int cmp = compareenv(&env[mid], &name);
1273 if (cmp < 0)
1274 low = mid + 1;
1275 else if (cmp > 0)
1276 high = mid;
1277 else
1278 return mid;
ba26f296 1279 }
343ff06d 1280 return ~low; /* not found, return 1's complement of insert position */
ba26f296
JS		 1281}
1282
1283/*
1284 * If name contains '=', then sets the variable, otherwise it unsets it
f279242d
KB		 1285 * Size includes the terminating NULL. Env must have room for size + 1 entries
1286 * (in case of insert). Returns the new size. Optionally frees removed entries.
ba26f296 1287 */
f279242d 1288static int do_putenv(char **env, const char *name, int size, int free_old)
ba26f296 1289{
343ff06d 1290 int i = bsearchenv(env, name, size - 1);
ba26f296 1291
343ff06d
KB		 1292 /* optionally free removed / replaced entry */
1293 if (i >= 0 && free_old)
ba26f296 1294 free(env[i]);
ba26f296 1295
343ff06d
KB		 1296 if (strchr(name, '=')) {
1297 /* if new value ('key=value') is specified, insert or replace entry */
1298 if (i < 0) {
1299 i = ~i;
1300 memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
f279242d 1301 size++;
ba26f296 1302 }
343ff06d
KB		 1303 env[i] = (char*) name;
1304 } else if (i >= 0) {
1305 /* otherwise ('key') remove existing entry */
1306 size--;
1307 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
ba26f296 1308 }
f279242d 1309 return size;
2affea41
JS		 1310}
1311
6dc71543 1312char *mingw_getenv(const char *name)
df599e96 1313{
343ff06d
KB		 1314 char *value;
1315 int pos = bsearchenv(environ, name, environ_size - 1);
1316 if (pos < 0)
1317 return NULL;
1318 value = strchr(environ[pos], '=');
1319 return value ? &value[1] : NULL;
df599e96
JS		 1320}
1321
b729f98f 1322int mingw_putenv(const char *namevalue)
06bc4b79 1323{
f279242d
KB		 1324 ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
1325 environ_size = do_putenv(environ, namevalue, environ_size, 1);
b729f98f 1326 return 0;
06bc4b79
JS		 1327}
1328
fe3b2b7b
MS		 1329/*
1330 * Note, this isn't a complete replacement for getaddrinfo. It assumes
0353a0c4 1331 * that service contains a numerical port, or that it is null. It
fe3b2b7b
MS		 1332 * does a simple search using gethostbyname, and returns one IPv4 host
1333 * if one was found.
1334 */
1335static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1336 const struct addrinfo *hints,
1337 struct addrinfo **res)
1338{
cbefd2d6 1339 struct hostent *h = NULL;
fe3b2b7b
MS		 1340 struct addrinfo *ai;
1341 struct sockaddr_in *sin;
1342
cbefd2d6
MS		 1343 if (node) {
1344 h = gethostbyname(node);
1345 if (!h)
1346 return WSAGetLastError();
1347 }
fe3b2b7b
MS		 1348
1349 ai = xmalloc(sizeof(struct addrinfo));
1350 *res = ai;
1351 ai->ai_flags = 0;
1352 ai->ai_family = AF_INET;
cbefd2d6
MS		 1353 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1354 switch (ai->ai_socktype) {
fe3b2b7b
MS		 1355 case SOCK_STREAM:
1356 ai->ai_protocol = IPPROTO_TCP;
1357 break;
1358 case SOCK_DGRAM:
1359 ai->ai_protocol = IPPROTO_UDP;
1360 break;
1361 default:
1362 ai->ai_protocol = 0;
1363 break;
1364 }
1365 ai->ai_addrlen = sizeof(struct sockaddr_in);
cbefd2d6 1366 if (hints && (hints->ai_flags & AI_CANONNAME))
040a6551 1367 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
cbefd2d6
MS		 1368 else
1369 ai->ai_canonname = NULL;
fe3b2b7b 1370
51a60f5b 1371 sin = xcalloc(1, ai->ai_addrlen);
fe3b2b7b 1372 sin->sin_family = AF_INET;
cbefd2d6
MS		 1373 /* Note: getaddrinfo is supposed to allow service to be a string,
1374 * which should be looked up using getservbyname. This is
1375 * currently not implemented */
fe3b2b7b
MS		 1376 if (service)
1377 sin->sin_port = htons(atoi(service));
cbefd2d6
MS		 1378 if (h)
1379 sin->sin_addr = *(struct in_addr *)h->h_addr;
1380 else if (hints && (hints->ai_flags & AI_PASSIVE))
1381 sin->sin_addr.s_addr = INADDR_ANY;
1382 else
1383 sin->sin_addr.s_addr = INADDR_LOOPBACK;
fe3b2b7b 1384 ai->ai_addr = (struct sockaddr *)sin;
657b35f4 1385 ai->ai_next = NULL;
fe3b2b7b
MS		 1386 return 0;
1387}
1388
1389static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1390{
1391 free(res->ai_canonname);
1392 free(res->ai_addr);
1393 free(res);
1394}
1395
1396static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1397 char *host, DWORD hostlen,
1398 char *serv, DWORD servlen, int flags)
1399{
1400 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1401 if (sa->sa_family != AF_INET)
1402 return EAI_FAMILY;
1403 if (!host && !serv)
1404 return EAI_NONAME;
1405
1406 if (host && hostlen > 0) {
1407 struct hostent *ent = NULL;
1408 if (!(flags & NI_NUMERICHOST))
1409 ent = gethostbyaddr((const char *)&sin->sin_addr,
1410 sizeof(sin->sin_addr), AF_INET);
1411
1412 if (ent)
1413 snprintf(host, hostlen, "%s", ent->h_name);
1414 else if (flags & NI_NAMEREQD)
1415 return EAI_NONAME;
1416 else
1417 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1418 }
1419
1420 if (serv && servlen > 0) {
1421 struct servent *ent = NULL;
1422 if (!(flags & NI_NUMERICSERV))
1423 ent = getservbyport(sin->sin_port,
1424 flags & NI_DGRAM ? "udp" : "tcp");
1425
1426 if (ent)
1427 snprintf(serv, servlen, "%s", ent->s_name);
1428 else
1429 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1430 }
1431
1432 return 0;
1433}
1434
1435static HMODULE ipv6_dll = NULL;
1436static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1437static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1438 const struct addrinfo *hints,
1439 struct addrinfo **res);
1440static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1441 char *host, DWORD hostlen,
1442 char *serv, DWORD servlen, int flags);
1443/*
1444 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1445 * don't need to try to load that one dynamically.
1446 */
1447
1448static void socket_cleanup(void)
1449{
1450 WSACleanup();
1451 if (ipv6_dll)
1452 FreeLibrary(ipv6_dll);
1453 ipv6_dll = NULL;
1454 ipv6_freeaddrinfo = freeaddrinfo_stub;
1455 ipv6_getaddrinfo = getaddrinfo_stub;
1456 ipv6_getnameinfo = getnameinfo_stub;
1457}
1458
b7cc9f82 1459static void ensure_socket_initialization(void)
746fb857
JS		 1460{
1461 WSADATA wsa;
b7cc9f82 1462 static int initialized = 0;
fe3b2b7b
MS		 1463 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1464 const char **name;
b7cc9f82
MS		 1465
1466 if (initialized)
1467 return;
746fb857
JS		 1468
1469 if (WSAStartup(MAKEWORD(2,2), &wsa))
1470 die("unable to initialize winsock subsystem, error %d",
1471 WSAGetLastError());
fe3b2b7b
MS		 1472
1473 for (name = libraries; *name; name++) {
1474 ipv6_dll = LoadLibrary(*name);
1475 if (!ipv6_dll)
1476 continue;
1477
1478 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1479 GetProcAddress(ipv6_dll, "freeaddrinfo");
1480 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1481 const struct addrinfo *,
1482 struct addrinfo **))
1483 GetProcAddress(ipv6_dll, "getaddrinfo");
1484 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1485 socklen_t, char *, DWORD,
1486 char *, DWORD, int))
1487 GetProcAddress(ipv6_dll, "getnameinfo");
1488 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1489 FreeLibrary(ipv6_dll);
1490 ipv6_dll = NULL;
1491 } else
1492 break;
1493 }
1494 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1495 ipv6_freeaddrinfo = freeaddrinfo_stub;
1496 ipv6_getaddrinfo = getaddrinfo_stub;
1497 ipv6_getnameinfo = getnameinfo_stub;
1498 }
1499
1500 atexit(socket_cleanup);
b7cc9f82
MS		 1501 initialized = 1;
1502}
1503
13d24b01
PT		 1504#undef gethostname
1505int mingw_gethostname(char *name, int namelen)
1506{
1507 ensure_socket_initialization();
1508 return gethostname(name, namelen);
1509}
1510
b7cc9f82
MS		 1511#undef gethostbyname
1512struct hostent *mingw_gethostbyname(const char *host)
1513{
1514 ensure_socket_initialization();
746fb857
JS		 1515 return gethostbyname(host);
1516}
1517
fe3b2b7b
MS		 1518void mingw_freeaddrinfo(struct addrinfo *res)
1519{
1520 ipv6_freeaddrinfo(res);
1521}
1522
1523int mingw_getaddrinfo(const char *node, const char *service,
1524 const struct addrinfo *hints, struct addrinfo **res)
1525{
1526 ensure_socket_initialization();
1527 return ipv6_getaddrinfo(node, service, hints, res);
1528}
1529
1530int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1531 char *host, DWORD hostlen, char *serv, DWORD servlen,
1532 int flags)
1533{
1534 ensure_socket_initialization();
1535 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1536}
1537
746fb857
JS		 1538int mingw_socket(int domain, int type, int protocol)
1539{
1540 int sockfd;
772991af
MP		 1541 SOCKET s;
1542
1543 ensure_socket_initialization();
1544 s = WSASocket(domain, type, protocol, NULL, 0, 0);
746fb857
JS		 1545 if (s == INVALID_SOCKET) {
1546 /*
1547 * WSAGetLastError() values are regular BSD error codes
1548 * biased by WSABASEERR.
1549 * However, strerror() does not know about networking
1550 * specific errors, which are values beginning at 38 or so.
1551 * Therefore, we choose to leave the biased error code
1552 * in errno so that _if_ someone looks up the code somewhere,
1553 * then it is at least the number that are usually listed.
1554 */
1555 errno = WSAGetLastError();
1556 return -1;
1557 }
1558 /* convert into a file descriptor */
1559 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1560 closesocket(s);
1561 return error("unable to make a socket file descriptor: %s",
1562 strerror(errno));
1563 }
1564 return sockfd;
1565}
1566
1567#undef connect
1568int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1569{
1570 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1571 return connect(s, sa, sz);
1572}
1573
772991af
MP		 1574#undef bind
1575int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1576{
1577 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1578 return bind(s, sa, sz);
1579}
1580
1581#undef setsockopt
1582int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1583{
1584 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1585 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1586}
1587
a7941795
JS		 1588#undef shutdown
1589int mingw_shutdown(int sockfd, int how)
1590{
1591 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1592 return shutdown(s, how);
1593}
1594
772991af
MP		 1595#undef listen
1596int mingw_listen(int sockfd, int backlog)
1597{
1598 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1599 return listen(s, backlog);
1600}
1601
1602#undef accept
1603int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1604{
1605 int sockfd2;
1606
1607 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1608 SOCKET s2 = accept(s1, sa, sz);
1609
1610 /* convert into a file descriptor */
1611 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1612 int err = errno;
1613 closesocket(s2);
1614 return error("unable to make a socket file descriptor: %s",
1615 strerror(err));
1616 }
1617 return sockfd2;
1618}
1619
ea9e98c3
JS		 1620#undef rename
1621int mingw_rename(const char *pold, const char *pnew)
1622{
6ac6f878
JS		 1623 DWORD attrs, gle;
1624 int tries = 0;
85faec9d
KB		 1625 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1626 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1627 return -1;
632f7017 1628
ea9e98c3
JS		 1629 /*
1630 * Try native rename() first to get errno right.
1631 * It is based on MoveFile(), which cannot overwrite existing files.
1632 */
85faec9d 1633 if (!_wrename(wpold, wpnew))
ea9e98c3
JS		 1634 return 0;
1635 if (errno != EEXIST)
1636 return -1;
6ac6f878 1637repeat:
85faec9d 1638 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
ea9e98c3
JS		 1639 return 0;
1640 /* TODO: translate more errors */
6ac6f878
JS		 1641 gle = GetLastError();
1642 if (gle == ERROR_ACCESS_DENIED &&
85faec9d 1643 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
632f7017 1644 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
4426fb51 1645 DWORD attrsold = GetFileAttributesW(wpold);
1646 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1647 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1648 errno = EISDIR;
1649 else if (!_wrmdir(wpnew))
1650 goto repeat;
ea9e98c3
JS		 1651 return -1;
1652 }
632f7017 1653 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
85faec9d
KB		 1654 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1655 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
632f7017 1656 return 0;
6ac6f878 1657 gle = GetLastError();
632f7017 1658 /* revert file attributes on failure */
85faec9d 1659 SetFileAttributesW(wpnew, attrs);
632f7017 1660 }
ea9e98c3 1661 }
6ac6f878
JS		 1662 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1663 /*
1664 * We assume that some other process had the source or
1665 * destination file open at the wrong moment and retry.
1666 * In order to give the other process a higher chance to
1667 * complete its operation, we give up our time slice now.
1668 * If we have to retry again, we do sleep a bit.
1669 */
1670 Sleep(delay[tries]);
1671 tries++;
1672 goto repeat;
1673 }
c9b78400
HV		 1674 if (gle == ERROR_ACCESS_DENIED &&
1675 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1676 "Should I try again?", pold, pnew))
1677 goto repeat;
1678
ea9e98c3
JS		 1679 errno = EACCES;
1680 return -1;
1681}
1682
b1b95204
RJ		 1683/*
1684 * Note that this doesn't return the actual pagesize, but
1685 * the allocation granularity. If future Windows specific git code
1686 * needs the real getpagesize function, we need to find another solution.
1687 */
1688int mingw_getpagesize(void)
1689{
1690 SYSTEM_INFO si;
1691 GetSystemInfo(&si);
1692 return si.dwAllocationGranularity;
1693}
1694
f4626df5
JS		 1695struct passwd *getpwuid(int uid)
1696{
f7597aca 1697 static char user_name[100];
f4626df5 1698 static struct passwd p;
f7597aca
JS		 1699
1700 DWORD len = sizeof(user_name);
1701 if (!GetUserName(user_name, &len))
1702 return NULL;
1703 p.pw_name = user_name;
1704 p.pw_gecos = "unknown";
1705 p.pw_dir = NULL;
f4626df5
JS		 1706 return &p;
1707}
1708
6072fc31
JS		 1709static HANDLE timer_event;
1710static HANDLE timer_thread;
1711static int timer_interval;
1712static int one_shot;
176478a8 1713static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
6072fc31
JS		 1714
1715/* The timer works like this:
1716 * The thread, ticktack(), is a trivial routine that most of the time
1717 * only waits to receive the signal to terminate. The main thread tells
1718 * the thread to terminate by setting the timer_event to the signalled
1719 * state.
1720 * But ticktack() interrupts the wait state after the timer's interval
1721 * length to call the signal handler.
1722 */
1723
d7fa500f 1724static unsigned __stdcall ticktack(void *dummy)
6072fc31
JS		 1725{
1726 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
176478a8 1727 mingw_raise(SIGALRM);
6072fc31
JS		 1728 if (one_shot)
1729 break;
1730 }
1731 return 0;
1732}
1733
1734static int start_timer_thread(void)
1735{
1736 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1737 if (timer_event) {
1738 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1739 if (!timer_thread )
1740 return errno = ENOMEM,
1741 error("cannot start timer thread");
1742 } else
1743 return errno = ENOMEM,
1744 error("cannot allocate resources for timer");
1745 return 0;
1746}
1747
1748static void stop_timer_thread(void)
1749{
1750 if (timer_event)
1751 SetEvent(timer_event); /* tell thread to terminate */
1752 if (timer_thread) {
1753 int rc = WaitForSingleObject(timer_thread, 1000);
1754 if (rc == WAIT_TIMEOUT)
1755 error("timer thread did not terminate timely");
1756 else if (rc != WAIT_OBJECT_0)
1757 error("waiting for timer thread failed: %lu",
1758 GetLastError());
1759 CloseHandle(timer_thread);
1760 }
1761 if (timer_event)
1762 CloseHandle(timer_event);
1763 timer_event = NULL;
1764 timer_thread = NULL;
1765}
1766
1767static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1768{
1769 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1770}
1771
f4626df5
JS		 1772int setitimer(int type, struct itimerval *in, struct itimerval *out)
1773{
6072fc31
JS		 1774 static const struct timeval zero;
1775 static int atexit_done;
1776
1777 if (out != NULL)
1778 return errno = EINVAL,
1779 error("setitimer param 3 != NULL not implemented");
1780 if (!is_timeval_eq(&in->it_interval, &zero) &&
1781 !is_timeval_eq(&in->it_interval, &in->it_value))
1782 return errno = EINVAL,
1783 error("setitimer: it_interval must be zero or eq it_value");
1784
1785 if (timer_thread)
1786 stop_timer_thread();
1787
1788 if (is_timeval_eq(&in->it_value, &zero) &&
1789 is_timeval_eq(&in->it_interval, &zero))
1790 return 0;
1791
1792 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1793 one_shot = is_timeval_eq(&in->it_interval, &zero);
1794 if (!atexit_done) {
1795 atexit(stop_timer_thread);
1796 atexit_done = 1;
1797 }
1798 return start_timer_thread();
f4626df5
JS		 1799}
1800
1801int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1802{
6072fc31
JS		 1803 if (sig != SIGALRM)
1804 return errno = EINVAL,
1805 error("sigaction only implemented for SIGALRM");
1806 if (out != NULL)
1807 return errno = EINVAL,
1808 error("sigaction: param 3 != NULL not implemented");
1809
1810 timer_fn = in->sa_handler;
1811 return 0;
1812}
1813
1814#undef signal
1815sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1816{
a4540658 1817 sig_handler_t old;
176478a8
EFL		 1818
1819 switch (sig) {
1820 case SIGALRM:
a4540658 1821 old = timer_fn;
176478a8
EFL		 1822 timer_fn = handler;
1823 break;
1824
1825 case SIGINT:
a4540658 1826 old = sigint_fn;
176478a8
EFL		 1827 sigint_fn = handler;
1828 break;
1829
1830 default:
6072fc31 1831 return signal(sig, handler);
176478a8
EFL		 1832 }
1833
6072fc31 1834 return old;
f4626df5 1835}
4804aabc 1836
176478a8
EFL		 1837#undef raise
1838int mingw_raise(int sig)
1839{
1840 switch (sig) {
1841 case SIGALRM:
1842 if (timer_fn == SIG_DFL) {
1843 if (isatty(STDERR_FILENO))
1844 fputs("Alarm clock\n", stderr);
1845 exit(128 + SIGALRM);
1846 } else if (timer_fn != SIG_IGN)
1847 timer_fn(SIGALRM);
1848 return 0;
1849
1850 case SIGINT:
1851 if (sigint_fn == SIG_DFL)
1852 exit(128 + SIGINT);
1853 else if (sigint_fn != SIG_IGN)
1854 sigint_fn(SIGINT);
1855 return 0;
1856
1857 default:
1858 return raise(sig);
1859 }
1860}
1861
1862
4804aabc
SP		 1863static const char *make_backslash_path(const char *path)
1864{
1865 static char buf[PATH_MAX + 1];
1866 char *c;
1867
1868 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1869 die("Too long path: %.*s", 60, path);
1870
1871 for (c = buf; *c; c++) {
1872 if (*c == '/')
1873 *c = '\\';
1874 }
1875 return buf;
1876}
1877
1878void mingw_open_html(const char *unixpath)
1879{
1880 const char *htmlpath = make_backslash_path(unixpath);
928500e0
JS		 1881 typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1882 const char *, const char *, const char *, INT);
1883 T ShellExecute;
1884 HMODULE shell32;
442dada2 1885 int r;
928500e0
JS		 1886
1887 shell32 = LoadLibrary("shell32.dll");
1888 if (!shell32)
1889 die("cannot load shell32.dll");
1890 ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1891 if (!ShellExecute)
1892 die("cannot run browser");
1893
4804aabc 1894 printf("Launching default browser to display HTML ...\n");
7c00bc39
JS		 1895 r = HCAST(int, ShellExecute(NULL, "open", htmlpath,
1896 NULL, "\\", SW_SHOWNORMAL));
928500e0 1897 FreeLibrary(shell32);
442dada2
PT		 1898 /* see the MSDN documentation referring to the result codes here */
1899 if (r <= 32) {
1900 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1901 }
4804aabc 1902}
7be401e0
PK		 1903
1904int link(const char *oldpath, const char *newpath)
1905{
85faec9d 1906 typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
7be401e0 1907 static T create_hard_link = NULL;
85faec9d
KB		 1908 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1909 if (xutftowcs_path(woldpath, oldpath) < 0 ||
1910 xutftowcs_path(wnewpath, newpath) < 0)
1911 return -1;
1912
7be401e0
PK		 1913 if (!create_hard_link) {
1914 create_hard_link = (T) GetProcAddress(
85faec9d 1915 GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
7be401e0
PK		 1916 if (!create_hard_link)
1917 create_hard_link = (T)-1;
1918 }
1919 if (create_hard_link == (T)-1) {
1920 errno = ENOSYS;
1921 return -1;
1922 }
85faec9d 1923 if (!create_hard_link(wnewpath, woldpath, NULL)) {
7be401e0
PK		 1924 errno = err_win_to_posix(GetLastError());
1925 return -1;
1926 }
1927 return 0;
1928}
0dbbbc1e 1929
956d86d1 1930pid_t waitpid(pid_t pid, int *status, int options)
52de4db5
EFL		 1931{
1932 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1933 FALSE, pid);
1934 if (!h) {
1935 errno = ECHILD;
1936 return -1;
1937 }
1938
ef7108ca
EFL		 1939 if (pid > 0 && options & WNOHANG) {
1940 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1941 CloseHandle(h);
1942 return 0;
1943 }
1944 options &= ~WNOHANG;
1945 }
1946
52de4db5
EFL		 1947 if (options == 0) {
1948 struct pinfo_t **ppinfo;
1949 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1950 CloseHandle(h);
1951 return 0;
1952 }
1953
1954 if (status)
1955 GetExitCodeProcess(h, (LPDWORD)status);
1956
1957 EnterCriticalSection(&pinfo_cs);
1958
1959 ppinfo = &pinfo;
1960 while (*ppinfo) {
1961 struct pinfo_t *info = *ppinfo;
1962 if (info->pid == pid) {
1963 CloseHandle(info->proc);
1964 *ppinfo = info->next;
1965 free(info);
1966 break;
1967 }
1968 ppinfo = &info->next;
1969 }
1970
1971 LeaveCriticalSection(&pinfo_cs);
1972
1973 CloseHandle(h);
1974 return pid;
1975 }
1976 CloseHandle(h);
1977
1978 errno = EINVAL;
1979 return -1;
1980}
c2369bdf 1981
e7d5ce81
JS		 1982int mingw_skip_dos_drive_prefix(char **path)
1983{
1984 int ret = has_dos_drive_prefix(*path);
1985 *path += ret;
1986 return ret;
1987}
1988
c2369bdf
CZ		 1989int mingw_offset_1st_component(const char *path)
1990{
2f36eed9 1991 char *pos = (char *)path;
c2369bdf
CZ		 1992
1993 /* unc paths */
2f36eed9
JS		 1994 if (!skip_dos_drive_prefix(&pos) &&
1995 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
c2369bdf 1996 /* skip server name */
2f36eed9 1997 pos = strpbrk(pos + 2, "\\/");
c2369bdf
CZ		 1998 if (!pos)
1999 return 0; /* Error: malformed unc path */
2000
2001 do {
2002 pos++;
2003 } while (*pos && !is_dir_sep(*pos));
c2369bdf
CZ		 2004 }
2005
2f36eed9 2006 return pos + is_dir_sep(*pos) - path;
c2369bdf 2007}
13f1df43 2008
1c950a59
KB		 2009int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2010{
2011 int upos = 0, wpos = 0;
2012 const unsigned char *utf = (const unsigned char*) utfs;
2013 if (!utf || !wcs || wcslen < 1) {
2014 errno = EINVAL;
2015 return -1;
2016 }
2017 /* reserve space for \0 */
2018 wcslen--;
2019 if (utflen < 0)
2020 utflen = INT_MAX;
2021
2022 while (upos < utflen) {
2023 int c = utf[upos++] & 0xff;
2024 if (utflen == INT_MAX && c == 0)
2025 break;
2026
2027 if (wpos >= wcslen) {
2028 wcs[wpos] = 0;
2029 errno = ERANGE;
2030 return -1;
2031 }
2032
2033 if (c < 0x80) {
2034 /* ASCII */
2035 wcs[wpos++] = c;
2036 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2037 (utf[upos] & 0xc0) == 0x80) {
2038 /* 2-byte utf-8 */
2039 c = ((c & 0x1f) << 6);
2040 c |= (utf[upos++] & 0x3f);
2041 wcs[wpos++] = c;
2042 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2043 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2044 (utf[upos] & 0xc0) == 0x80 &&
2045 (utf[upos + 1] & 0xc0) == 0x80) {
2046 /* 3-byte utf-8 */
2047 c = ((c & 0x0f) << 12);
2048 c |= ((utf[upos++] & 0x3f) << 6);
2049 c |= (utf[upos++] & 0x3f);
2050 wcs[wpos++] = c;
2051 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2052 wpos + 1 < wcslen &&
2053 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2054 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2055 (utf[upos] & 0xc0) == 0x80 &&
2056 (utf[upos + 1] & 0xc0) == 0x80 &&
2057 (utf[upos + 2] & 0xc0) == 0x80) {
2058 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2059 c = ((c & 0x07) << 18);
2060 c |= ((utf[upos++] & 0x3f) << 12);
2061 c |= ((utf[upos++] & 0x3f) << 6);
2062 c |= (utf[upos++] & 0x3f);
2063 c -= 0x10000;
2064 wcs[wpos++] = 0xd800 | (c >> 10);
2065 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2066 } else if (c >= 0xa0) {
2067 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2068 wcs[wpos++] = c;
2069 } else {
2070 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2071 static const char *hex = "0123456789abcdef";
2072 wcs[wpos++] = hex[c >> 4];
2073 if (wpos < wcslen)
2074 wcs[wpos++] = hex[c & 0x0f];
2075 }
2076 }
2077 wcs[wpos] = 0;
2078 return wpos;
2079}
2080
2081int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2082{
2083 if (!wcs || !utf || utflen < 1) {
2084 errno = EINVAL;
2085 return -1;
2086 }
2087 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2088 if (utflen)
2089 return utflen - 1;
2090 errno = ERANGE;
2091 return -1;
2092}
2093
02e6edc0
KB		 2094static void setup_windows_environment()
2095{
1fc7bf79
JS		 2096 char *tmp = getenv("TMPDIR");
2097
02e6edc0 2098 /* on Windows it is TMP and TEMP */
1fc7bf79
JS		 2099 if (!tmp) {
2100 if (!(tmp = getenv("TMP")))
02e6edc0 2101 tmp = getenv("TEMP");
1fc7bf79 2102 if (tmp) {
02e6edc0 2103 setenv("TMPDIR", tmp, 1);
1fc7bf79
JS		 2104 tmp = getenv("TMPDIR");
2105 }
2106 }
2107
2108 if (tmp) {
2109 /*
2110 * Convert all dir separators to forward slashes,
2111 * to help shell commands called from the Git
2112 * executable (by not mistaking the dir separators
2113 * for escape characters).
2114 */
2115 for (; *tmp; tmp++)
2116 if (*tmp == '\\')
2117 *tmp = '/';
02e6edc0
KB		 2118 }
2119
2120 /* simulate TERM to enable auto-color (see color.c) */
2121 if (!getenv("TERM"))
2122 setenv("TERM", "cygwin", 1);
2123}
2124
5901dc66
KB		 2125/*
2126 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2127 * mingw startup code, see init.c in mingw runtime).
2128 */
2129int _CRT_glob = 0;
2130
3f046148
KB		 2131typedef struct {
2132 int newmode;
2133} _startupinfo;
2134
2135extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2136 _startupinfo *si);
2137
2138static NORETURN void die_startup()
2139{
2140 fputs("fatal: not enough memory for initialization", stderr);
2141 exit(128);
2142}
2143
6f1c189c
KB		 2144static void *malloc_startup(size_t size)
2145{
2146 void *result = malloc(size);
2147 if (!result)
2148 die_startup();
2149 return result;
2150}
2151
2152static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2153{
2154 len = xwcstoutf(buffer, wcs, len) + 1;
2155 return memcpy(malloc_startup(len), buffer, len);
2156}
2157
13f1df43
KB		 2158void mingw_startup()
2159{
6f1c189c 2160 int i, maxlen, argc;
3f046148
KB		 2161 char *buffer;
2162 wchar_t **wenv, **wargv;
2163 _startupinfo si;
2164
2165 /* get wide char arguments and environment */
2166 si.newmode = 0;
2167 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2168 die_startup();
2169
2170 /* determine size of argv and environ conversion buffer */
2171 maxlen = wcslen(_wpgmptr);
2172 for (i = 1; i < argc; i++)
2173 maxlen = max(maxlen, wcslen(wargv[i]));
b729f98f
KB		 2174 for (i = 0; wenv[i]; i++)
2175 maxlen = max(maxlen, wcslen(wenv[i]));
2176
6f1c189c
KB		 2177 /*
2178 * nedmalloc can't free CRT memory, allocate resizable environment
2179 * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2180 * use it while initializing the environment itself.
2181 */
f279242d 2182 environ_size = i + 1;
6f1c189c
KB		 2183 environ_alloc = alloc_nr(environ_size * sizeof(char*));
2184 environ = malloc_startup(environ_alloc);
3f046148
KB		 2185
2186 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2187 maxlen = 3 * maxlen + 1;
6f1c189c 2188 buffer = malloc_startup(maxlen);
3f046148
KB		 2189
2190 /* convert command line arguments and environment to UTF-8 */
6f1c189c
KB		 2191 __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2192 for (i = 1; i < argc; i++)
2193 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2194 for (i = 0; wenv[i]; i++)
2195 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
f279242d 2196 environ[i] = NULL;
3f046148 2197 free(buffer);
13f1df43 2198
343ff06d
KB		 2199 /* sort environment for O(log n) getenv / putenv */
2200 qsort(environ, i, sizeof(char*), compareenv);
2201
6dc71543 2202 /* fix Windows specific environment settings */
02e6edc0 2203 setup_windows_environment();
baea068d 2204
13f1df43
KB		 2205 /* initialize critical section for waitpid pinfo_t list */
2206 InitializeCriticalSection(&pinfo_cs);
2207
2208 /* set up default file mode and file modes for stdin/out/err */
2209 _fmode = _O_BINARY;
2210 _setmode(_fileno(stdin), _O_BINARY);
2211 _setmode(_fileno(stdout), _O_BINARY);
2212 _setmode(_fileno(stderr), _O_BINARY);
eac14f89
KB		 2213
2214 /* initialize Unicode console */
2215 winansi_init();
13f1df43 2216}
7b6aff06
NTND		 2217
2218int uname(struct utsname *buf)
2219{
d62c89af 2220 unsigned v = (unsigned)GetVersion();
7b6aff06 2221 memset(buf, 0, sizeof(*buf));
5096d490
JK		 2222 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2223 xsnprintf(buf->release, sizeof(buf->release),
2224 "%u.%u", v & 0xff, (v >> 8) & 0xff);
7b6aff06 2225 /* assuming NT variants only.. */
5096d490
JK		 2226 xsnprintf(buf->version, sizeof(buf->version),
2227 "%u", (v >> 16) & 0x7fff);
7b6aff06
NTND		 2228 return 0;
2229}
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