5a8fae8b315cc5748907465b6b374670579707a7
1#include "../git-compat-util.h"
2#include "win32.h"
3#include <conio.h>
4#include "../strbuf.h"
5static int err_win_to_posix(DWORD winerr)
7{
8 int error = ENOSYS;
9 switch(winerr) {
10 case ERROR_ACCESS_DENIED: error = EACCES; break;
11 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
12 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
13 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
14 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
15 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
16 case ERROR_BAD_COMMAND: error = EIO; break;
17 case ERROR_BAD_DEVICE: error = ENODEV; break;
18 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
19 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
20 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
21 case ERROR_BAD_LENGTH: error = EINVAL; break;
22 case ERROR_BAD_PATHNAME: error = ENOENT; break;
23 case ERROR_BAD_PIPE: error = EPIPE; break;
24 case ERROR_BAD_UNIT: error = ENODEV; break;
25 case ERROR_BAD_USERNAME: error = EINVAL; break;
26 case ERROR_BROKEN_PIPE: error = EPIPE; break;
27 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
28 case ERROR_BUSY: error = EBUSY; break;
29 case ERROR_BUSY_DRIVE: error = EBUSY; break;
30 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
31 case ERROR_CANNOT_MAKE: error = EACCES; break;
32 case ERROR_CANTOPEN: error = EIO; break;
33 case ERROR_CANTREAD: error = EIO; break;
34 case ERROR_CANTWRITE: error = EIO; break;
35 case ERROR_CRC: error = EIO; break;
36 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
37 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
38 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
39 case ERROR_DIRECTORY: error = EINVAL; break;
40 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
41 case ERROR_DISK_CHANGE: error = EIO; break;
42 case ERROR_DISK_FULL: error = ENOSPC; break;
43 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
44 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
45 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
46 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
47 case ERROR_FILE_EXISTS: error = EEXIST; break;
48 case ERROR_FILE_INVALID: error = ENODEV; break;
49 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
50 case ERROR_GEN_FAILURE: error = EIO; break;
51 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
52 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
53 case ERROR_INVALID_ACCESS: error = EACCES; break;
54 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
55 case ERROR_INVALID_BLOCK: error = EFAULT; break;
56 case ERROR_INVALID_DATA: error = EINVAL; break;
57 case ERROR_INVALID_DRIVE: error = ENODEV; break;
58 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
59 case ERROR_INVALID_FLAGS: error = EINVAL; break;
60 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
61 case ERROR_INVALID_HANDLE: error = EBADF; break;
62 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
63 case ERROR_INVALID_NAME: error = EINVAL; break;
64 case ERROR_INVALID_OWNER: error = EINVAL; break;
65 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
66 case ERROR_INVALID_PASSWORD: error = EPERM; break;
67 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
68 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
69 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
70 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
71 case ERROR_IO_DEVICE: error = EIO; break;
72 case ERROR_IO_INCOMPLETE: error = EINTR; break;
73 case ERROR_LOCKED: error = EBUSY; break;
74 case ERROR_LOCK_VIOLATION: error = EACCES; break;
75 case ERROR_LOGON_FAILURE: error = EACCES; break;
76 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
77 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
78 case ERROR_MORE_DATA: error = EPIPE; break;
79 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
80 case ERROR_NOACCESS: error = EFAULT; break;
81 case ERROR_NONE_MAPPED: error = EINVAL; break;
82 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
83 case ERROR_NOT_READY: error = EAGAIN; break;
84 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
85 case ERROR_NO_DATA: error = EPIPE; break;
86 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
87 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
88 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
89 case ERROR_OPEN_FAILED: error = EIO; break;
90 case ERROR_OPEN_FILES: error = EBUSY; break;
91 case ERROR_OPERATION_ABORTED: error = EINTR; break;
92 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
93 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
94 case ERROR_PATH_BUSY: error = EBUSY; break;
95 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
96 case ERROR_PIPE_BUSY: error = EBUSY; break;
97 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
98 case ERROR_PIPE_LISTENING: error = EPIPE; break;
99 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
100 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
101 case ERROR_READ_FAULT: error = EIO; break;
102 case ERROR_SEEK: error = EIO; break;
103 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
104 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
105 case ERROR_SHARING_VIOLATION: error = EACCES; break;
106 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
107 case ERROR_SWAPERROR: error = ENOENT; break;
108 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
109 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
110 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
111 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
112 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
113 case ERROR_WRITE_FAULT: error = EIO; break;
114 case ERROR_WRITE_PROTECT: error = EROFS; break;
115 }
116 return error;
117}
118#undef open
120int mingw_open (const char *filename, int oflags, ...)
121{
122 va_list args;
123 unsigned mode;
124 int fd;
125 va_start(args, oflags);
127 mode = va_arg(args, int);
128 va_end(args);
129 if (!strcmp(filename, "/dev/null"))
131 filename = "nul";
132 fd = open(filename, oflags, mode);
134 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
136 DWORD attrs = GetFileAttributes(filename);
137 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
138 errno = EISDIR;
139 }
140 return fd;
141}
142static inline time_t filetime_to_time_t(const FILETIME *ft)
144{
145 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
146 winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
147 winTime /= 10000000; /* Nano to seconds resolution */
148 return (time_t)winTime;
149}
150/* We keep the do_lstat code in a separate function to avoid recursion.
152 * When a path ends with a slash, the stat will fail with ENOENT. In
153 * this case, we strip the trailing slashes and stat again.
154 */
155static int do_lstat(const char *file_name, struct stat *buf)
156{
157 WIN32_FILE_ATTRIBUTE_DATA fdata;
158 if (!(errno = get_file_attr(file_name, &fdata))) {
160 buf->st_ino = 0;
161 buf->st_gid = 0;
162 buf->st_uid = 0;
163 buf->st_nlink = 1;
164 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
165 buf->st_size = fdata.nFileSizeLow |
166 (((off_t)fdata.nFileSizeHigh)<<32);
167 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
168 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
169 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
170 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
171 return 0;
172 }
173 return -1;
174}
175/* We provide our own lstat/fstat functions, since the provided
177 * lstat/fstat functions are so slow. These stat functions are
178 * tailored for Git's usage (read: fast), and are not meant to be
179 * complete. Note that Git stat()s are redirected to mingw_lstat()
180 * too, since Windows doesn't really handle symlinks that well.
181 */
182int mingw_lstat(const char *file_name, struct stat *buf)
183{
184 int namelen;
185 static char alt_name[PATH_MAX];
186 if (!do_lstat(file_name, buf))
188 return 0;
189 /* if file_name ended in a '/', Windows returned ENOENT;
191 * try again without trailing slashes
192 */
193 if (errno != ENOENT)
194 return -1;
195 namelen = strlen(file_name);
197 if (namelen && file_name[namelen-1] != '/')
198 return -1;
199 while (namelen && file_name[namelen-1] == '/')
200 --namelen;
201 if (!namelen || namelen >= PATH_MAX)
202 return -1;
203 memcpy(alt_name, file_name, namelen);
205 alt_name[namelen] = 0;
206 return do_lstat(alt_name, buf);
207}
208#undef fstat
210int mingw_fstat(int fd, struct stat *buf)
211{
212 HANDLE fh = (HANDLE)_get_osfhandle(fd);
213 BY_HANDLE_FILE_INFORMATION fdata;
214 if (fh == INVALID_HANDLE_VALUE) {
216 errno = EBADF;
217 return -1;
218 }
219 /* direct non-file handles to MS's fstat() */
220 if (GetFileType(fh) != FILE_TYPE_DISK)
221 return _fstati64(fd, buf);
222 if (GetFileInformationByHandle(fh, &fdata)) {
224 buf->st_ino = 0;
225 buf->st_gid = 0;
226 buf->st_uid = 0;
227 buf->st_nlink = 1;
228 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
229 buf->st_size = fdata.nFileSizeLow |
230 (((off_t)fdata.nFileSizeHigh)<<32);
231 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
232 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
233 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
234 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
235 return 0;
236 }
237 errno = EBADF;
238 return -1;
239}
240static inline void time_t_to_filetime(time_t t, FILETIME *ft)
242{
243 long long winTime = t * 10000000LL + 116444736000000000LL;
244 ft->dwLowDateTime = winTime;
245 ft->dwHighDateTime = winTime >> 32;
246}
247int mingw_utime (const char *file_name, const struct utimbuf *times)
249{
250 FILETIME mft, aft;
251 int fh, rc;
252 /* must have write permission */
254 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
255 return -1;
256 time_t_to_filetime(times->modtime, &mft);
258 time_t_to_filetime(times->actime, &aft);
259 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
260 errno = EINVAL;
261 rc = -1;
262 } else
263 rc = 0;
264 close(fh);
265 return rc;
266}
267unsigned int sleep (unsigned int seconds)
269{
270 Sleep(seconds*1000);
271 return 0;
272}
273int mkstemp(char *template)
275{
276 char *filename = mktemp(template);
277 if (filename == NULL)
278 return -1;
279 return open(filename, O_RDWR | O_CREAT, 0600);
280}
281int gettimeofday(struct timeval *tv, void *tz)
283{
284 SYSTEMTIME st;
285 struct tm tm;
286 GetSystemTime(&st);
287 tm.tm_year = st.wYear-1900;
288 tm.tm_mon = st.wMonth-1;
289 tm.tm_mday = st.wDay;
290 tm.tm_hour = st.wHour;
291 tm.tm_min = st.wMinute;
292 tm.tm_sec = st.wSecond;
293 tv->tv_sec = tm_to_time_t(&tm);
294 if (tv->tv_sec < 0)
295 return -1;
296 tv->tv_usec = st.wMilliseconds*1000;
297 return 0;
298}
299int pipe(int filedes[2])
301{
302 int fd;
303 HANDLE h[2], parent;
304 if (_pipe(filedes, 8192, 0) < 0)
306 return -1;
307 parent = GetCurrentProcess();
309 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
311 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
312 close(filedes[0]);
313 close(filedes[1]);
314 return -1;
315 }
316 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
317 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
318 close(filedes[0]);
319 close(filedes[1]);
320 CloseHandle(h[0]);
321 return -1;
322 }
323 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
324 if (fd < 0) {
325 close(filedes[0]);
326 close(filedes[1]);
327 CloseHandle(h[0]);
328 CloseHandle(h[1]);
329 return -1;
330 }
331 close(filedes[0]);
332 filedes[0] = fd;
333 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
334 if (fd < 0) {
335 close(filedes[0]);
336 close(filedes[1]);
337 CloseHandle(h[1]);
338 return -1;
339 }
340 close(filedes[1]);
341 filedes[1] = fd;
342 return 0;
343}
344int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
346{
347 int i, pending;
348 if (timeout >= 0) {
350 if (nfds == 0) {
351 Sleep(timeout);
352 return 0;
353 }
354 return errno = EINVAL, error("poll timeout not supported");
355 }
356 /* When there is only one fd to wait for, then we pretend that
358 * input is available and let the actual wait happen when the
359 * caller invokes read().
360 */
361 if (nfds == 1) {
362 if (!(ufds[0].events & POLLIN))
363 return errno = EINVAL, error("POLLIN not set");
364 ufds[0].revents = POLLIN;
365 return 0;
366 }
367repeat:
369 pending = 0;
370 for (i = 0; i < nfds; i++) {
371 DWORD avail = 0;
372 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
373 if (h == INVALID_HANDLE_VALUE)
374 return -1; /* errno was set */
375 if (!(ufds[i].events & POLLIN))
377 return errno = EINVAL, error("POLLIN not set");
378 /* this emulation works only for pipes */
380 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
381 int err = GetLastError();
382 if (err == ERROR_BROKEN_PIPE) {
383 ufds[i].revents = POLLHUP;
384 pending++;
385 } else {
386 errno = EINVAL;
387 return error("PeekNamedPipe failed,"
388 " GetLastError: %u", err);
389 }
390 } else if (avail) {
391 ufds[i].revents = POLLIN;
392 pending++;
393 } else
394 ufds[i].revents = 0;
395 }
396 if (!pending) {
397 /* The only times that we spin here is when the process
398 * that is connected through the pipes is waiting for
399 * its own input data to become available. But since
400 * the process (pack-objects) is itself CPU intensive,
401 * it will happily pick up the time slice that we are
402 * relinquishing here.
403 */
404 Sleep(0);
405 goto repeat;
406 }
407 return 0;
408}
409struct tm *gmtime_r(const time_t *timep, struct tm *result)
411{
412 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
413 memcpy(result, gmtime(timep), sizeof(struct tm));
414 return result;
415}
416struct tm *localtime_r(const time_t *timep, struct tm *result)
418{
419 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
420 memcpy(result, localtime(timep), sizeof(struct tm));
421 return result;
422}
423#undef getcwd
425char *mingw_getcwd(char *pointer, int len)
426{
427 int i;
428 char *ret = getcwd(pointer, len);
429 if (!ret)
430 return ret;
431 for (i = 0; pointer[i]; i++)
432 if (pointer[i] == '\\')
433 pointer[i] = '/';
434 return ret;
435}
436#undef getenv
438char *mingw_getenv(const char *name)
439{
440 char *result = getenv(name);
441 if (!result && !strcmp(name, "TMPDIR")) {
442 /* on Windows it is TMP and TEMP */
443 result = getenv("TMP");
444 if (!result)
445 result = getenv("TEMP");
446 }
447 return result;
448}
449/*
451 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
452 * (Parsing C++ Command-Line Arguments)
453 */
454static const char *quote_arg(const char *arg)
455{
456 /* count chars to quote */
457 int len = 0, n = 0;
458 int force_quotes = 0;
459 char *q, *d;
460 const char *p = arg;
461 if (!*p) force_quotes = 1;
462 while (*p) {
463 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
464 force_quotes = 1;
465 else if (*p == '"')
466 n++;
467 else if (*p == '\\') {
468 int count = 0;
469 while (*p == '\\') {
470 count++;
471 p++;
472 len++;
473 }
474 if (*p == '"')
475 n += count*2 + 1;
476 continue;
477 }
478 len++;
479 p++;
480 }
481 if (!force_quotes && n == 0)
482 return arg;
483 /* insert \ where necessary */
485 d = q = xmalloc(len+n+3);
486 *d++ = '"';
487 while (*arg) {
488 if (*arg == '"')
489 *d++ = '\\';
490 else if (*arg == '\\') {
491 int count = 0;
492 while (*arg == '\\') {
493 count++;
494 *d++ = *arg++;
495 }
496 if (*arg == '"') {
497 while (count-- > 0)
498 *d++ = '\\';
499 *d++ = '\\';
500 }
501 }
502 *d++ = *arg++;
503 }
504 *d++ = '"';
505 *d++ = 0;
506 return q;
507}
508static const char *parse_interpreter(const char *cmd)
510{
511 static char buf[100];
512 char *p, *opt;
513 int n, fd;
514 /* don't even try a .exe */
516 n = strlen(cmd);
517 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
518 return NULL;
519 fd = open(cmd, O_RDONLY);
521 if (fd < 0)
522 return NULL;
523 n = read(fd, buf, sizeof(buf)-1);
524 close(fd);
525 if (n < 4) /* at least '#!/x' and not error */
526 return NULL;
527 if (buf[0] != '#' || buf[1] != '!')
529 return NULL;
530 buf[n] = '\0';
531 p = buf + strcspn(buf, "\r\n");
532 if (!*p)
533 return NULL;
534 *p = '\0';
536 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
537 return NULL;
538 /* strip options */
539 if ((opt = strchr(p+1, ' ')))
540 *opt = '\0';
541 return p+1;
542}
543/*
545 * Splits the PATH into parts.
546 */
547static char **get_path_split(void)
548{
549 char *p, **path, *envpath = getenv("PATH");
550 int i, n = 0;
551 if (!envpath || !*envpath)
553 return NULL;
554 envpath = xstrdup(envpath);
556 p = envpath;
557 while (p) {
558 char *dir = p;
559 p = strchr(p, ';');
560 if (p) *p++ = '\0';
561 if (*dir) { /* not earlier, catches series of ; */
562 ++n;
563 }
564 }
565 if (!n)
566 return NULL;
567 path = xmalloc((n+1)*sizeof(char *));
569 p = envpath;
570 i = 0;
571 do {
572 if (*p)
573 path[i++] = xstrdup(p);
574 p = p+strlen(p)+1;
575 } while (i < n);
576 path[i] = NULL;
577 free(envpath);
579 return path;
581}
582static void free_path_split(char **path)
584{
585 char **p = path;
586 if (!path)
588 return;
589 while (*p)
591 free(*p++);
592 free(path);
593}
594/*
596 * exe_only means that we only want to detect .exe files, but not scripts
597 * (which do not have an extension)
598 */
599static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
600{
601 char path[MAX_PATH];
602 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
603 if (!isexe && access(path, F_OK) == 0)
605 return xstrdup(path);
606 path[strlen(path)-4] = '\0';
607 if ((!exe_only || isexe) && access(path, F_OK) == 0)
608 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
609 return xstrdup(path);
610 return NULL;
611}
612/*
614 * Determines the absolute path of cmd using the the split path in path.
615 * If cmd contains a slash or backslash, no lookup is performed.
616 */
617static char *path_lookup(const char *cmd, char **path, int exe_only)
618{
619 char *prog = NULL;
620 int len = strlen(cmd);
621 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
622 if (strchr(cmd, '/') || strchr(cmd, '\\'))
624 prog = xstrdup(cmd);
625 while (!prog && *path)
627 prog = lookup_prog(*path++, cmd, isexe, exe_only);
628 return prog;
630}
631static int env_compare(const void *a, const void *b)
633{
634 char *const *ea = a;
635 char *const *eb = b;
636 return strcasecmp(*ea, *eb);
637}
638static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
640 int prepend_cmd)
641{
642 STARTUPINFO si;
643 PROCESS_INFORMATION pi;
644 struct strbuf envblk, args;
645 unsigned flags;
646 BOOL ret;
647 /* Determine whether or not we are associated to a console */
649 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
650 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
651 FILE_ATTRIBUTE_NORMAL, NULL);
652 if (cons == INVALID_HANDLE_VALUE) {
653 /* There is no console associated with this process.
654 * Since the child is a console process, Windows
655 * would normally create a console window. But
656 * since we'll be redirecting std streams, we do
657 * not need the console.
658 * It is necessary to use DETACHED_PROCESS
659 * instead of CREATE_NO_WINDOW to make ssh
660 * recognize that it has no console.
661 */
662 flags = DETACHED_PROCESS;
663 } else {
664 /* There is already a console. If we specified
665 * DETACHED_PROCESS here, too, Windows would
666 * disassociate the child from the console.
667 * The same is true for CREATE_NO_WINDOW.
668 * Go figure!
669 */
670 flags = 0;
671 CloseHandle(cons);
672 }
673 memset(&si, 0, sizeof(si));
674 si.cb = sizeof(si);
675 si.dwFlags = STARTF_USESTDHANDLES;
676 si.hStdInput = (HANDLE) _get_osfhandle(0);
677 si.hStdOutput = (HANDLE) _get_osfhandle(1);
678 si.hStdError = (HANDLE) _get_osfhandle(2);
679 /* concatenate argv, quoting args as we go */
681 strbuf_init(&args, 0);
682 if (prepend_cmd) {
683 char *quoted = (char *)quote_arg(cmd);
684 strbuf_addstr(&args, quoted);
685 if (quoted != cmd)
686 free(quoted);
687 }
688 for (; *argv; argv++) {
689 char *quoted = (char *)quote_arg(*argv);
690 if (*args.buf)
691 strbuf_addch(&args, ' ');
692 strbuf_addstr(&args, quoted);
693 if (quoted != *argv)
694 free(quoted);
695 }
696 if (env) {
698 int count = 0;
699 char **e, **sorted_env;
700 for (e = env; *e; e++)
702 count++;
703 /* environment must be sorted */
705 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
706 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
707 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
708 strbuf_init(&envblk, 0);
710 for (e = sorted_env; *e; e++) {
711 strbuf_addstr(&envblk, *e);
712 strbuf_addch(&envblk, '\0');
713 }
714 free(sorted_env);
715 }
716 memset(&pi, 0, sizeof(pi));
718 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
719 env ? envblk.buf : NULL, NULL, &si, &pi);
720 if (env)
722 strbuf_release(&envblk);
723 strbuf_release(&args);
724 if (!ret) {
726 errno = ENOENT;
727 return -1;
728 }
729 CloseHandle(pi.hThread);
730 return (pid_t)pi.hProcess;
731}
732pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
734{
735 pid_t pid;
736 char **path = get_path_split();
737 char *prog = path_lookup(cmd, path, 0);
738 if (!prog) {
740 errno = ENOENT;
741 pid = -1;
742 }
743 else {
744 const char *interpr = parse_interpreter(prog);
745 if (interpr) {
747 const char *argv0 = argv[0];
748 char *iprog = path_lookup(interpr, path, 1);
749 argv[0] = prog;
750 if (!iprog) {
751 errno = ENOENT;
752 pid = -1;
753 }
754 else {
755 pid = mingw_spawnve(iprog, argv, env, 1);
756 free(iprog);
757 }
758 argv[0] = argv0;
759 }
760 else
761 pid = mingw_spawnve(prog, argv, env, 0);
762 free(prog);
763 }
764 free_path_split(path);
765 return pid;
766}
767static int try_shell_exec(const char *cmd, char *const *argv, char **env)
769{
770 const char *interpr = parse_interpreter(cmd);
771 char **path;
772 char *prog;
773 int pid = 0;
774 if (!interpr)
776 return 0;
777 path = get_path_split();
778 prog = path_lookup(interpr, path, 1);
779 if (prog) {
780 int argc = 0;
781 const char **argv2;
782 while (argv[argc]) argc++;
783 argv2 = xmalloc(sizeof(*argv) * (argc+1));
784 argv2[0] = (char *)cmd; /* full path to the script file */
785 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
786 pid = mingw_spawnve(prog, argv2, env, 1);
787 if (pid >= 0) {
788 int status;
789 if (waitpid(pid, &status, 0) < 0)
790 status = 255;
791 exit(status);
792 }
793 pid = 1; /* indicate that we tried but failed */
794 free(prog);
795 free(argv2);
796 }
797 free_path_split(path);
798 return pid;
799}
800static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
802{
803 /* check if git_command is a shell script */
804 if (!try_shell_exec(cmd, argv, (char **)env)) {
805 int pid, status;
806 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
808 if (pid < 0)
809 return;
810 if (waitpid(pid, &status, 0) < 0)
811 status = 255;
812 exit(status);
813 }
814}
815void mingw_execvp(const char *cmd, char *const *argv)
817{
818 char **path = get_path_split();
819 char *prog = path_lookup(cmd, path, 0);
820 if (prog) {
822 mingw_execve(prog, argv, environ);
823 free(prog);
824 } else
825 errno = ENOENT;
826 free_path_split(path);
828}
829static char **copy_environ(void)
831{
832 char **env;
833 int i = 0;
834 while (environ[i])
835 i++;
836 env = xmalloc((i+1)*sizeof(*env));
837 for (i = 0; environ[i]; i++)
838 env[i] = xstrdup(environ[i]);
839 env[i] = NULL;
840 return env;
841}
842void free_environ(char **env)
844{
845 int i;
846 for (i = 0; env[i]; i++)
847 free(env[i]);
848 free(env);
849}
850static int lookup_env(char **env, const char *name, size_t nmln)
852{
853 int i;
854 for (i = 0; env[i]; i++) {
856 if (0 == strncmp(env[i], name, nmln)
857 && '=' == env[i][nmln])
858 /* matches */
859 return i;
860 }
861 return -1;
862}
863/*
865 * If name contains '=', then sets the variable, otherwise it unsets it
866 */
867static char **env_setenv(char **env, const char *name)
868{
869 char *eq = strchrnul(name, '=');
870 int i = lookup_env(env, name, eq-name);
871 if (i < 0) {
873 if (*eq) {
874 for (i = 0; env[i]; i++)
875 ;
876 env = xrealloc(env, (i+2)*sizeof(*env));
877 env[i] = xstrdup(name);
878 env[i+1] = NULL;
879 }
880 }
881 else {
882 free(env[i]);
883 if (*eq)
884 env[i] = xstrdup(name);
885 else
886 for (; env[i]; i++)
887 env[i] = env[i+1];
888 }
889 return env;
890}
891/*
893 * Copies global environ and adjusts variables as specified by vars.
894 */
895char **make_augmented_environ(const char *const *vars)
896{
897 char **env = copy_environ();
898 while (*vars)
900 env = env_setenv(env, *vars++);
901 return env;
902}
903/* this is the first function to call into WS_32; initialize it */
905#undef gethostbyname
906struct hostent *mingw_gethostbyname(const char *host)
907{
908 WSADATA wsa;
909 if (WSAStartup(MAKEWORD(2,2), &wsa))
911 die("unable to initialize winsock subsystem, error %d",
912 WSAGetLastError());
913 atexit((void(*)(void)) WSACleanup);
914 return gethostbyname(host);
915}
916int mingw_socket(int domain, int type, int protocol)
918{
919 int sockfd;
920 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
921 if (s == INVALID_SOCKET) {
922 /*
923 * WSAGetLastError() values are regular BSD error codes
924 * biased by WSABASEERR.
925 * However, strerror() does not know about networking
926 * specific errors, which are values beginning at 38 or so.
927 * Therefore, we choose to leave the biased error code
928 * in errno so that _if_ someone looks up the code somewhere,
929 * then it is at least the number that are usually listed.
930 */
931 errno = WSAGetLastError();
932 return -1;
933 }
934 /* convert into a file descriptor */
935 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
936 closesocket(s);
937 return error("unable to make a socket file descriptor: %s",
938 strerror(errno));
939 }
940 return sockfd;
941}
942#undef connect
944int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
945{
946 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
947 return connect(s, sa, sz);
948}
949#undef rename
951int mingw_rename(const char *pold, const char *pnew)
952{
953 DWORD attrs, gle;
954 int tries = 0;
955 static const int delay[] = { 0, 1, 10, 20, 40 };
956 /*
958 * Try native rename() first to get errno right.
959 * It is based on MoveFile(), which cannot overwrite existing files.
960 */
961 if (!rename(pold, pnew))
962 return 0;
963 if (errno != EEXIST)
964 return -1;
965repeat:
966 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
967 return 0;
968 /* TODO: translate more errors */
969 gle = GetLastError();
970 if (gle == ERROR_ACCESS_DENIED &&
971 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
972 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
973 errno = EISDIR;
974 return -1;
975 }
976 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
977 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
978 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
979 return 0;
980 gle = GetLastError();
981 /* revert file attributes on failure */
982 SetFileAttributes(pnew, attrs);
983 }
984 }
985 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
986 /*
987 * We assume that some other process had the source or
988 * destination file open at the wrong moment and retry.
989 * In order to give the other process a higher chance to
990 * complete its operation, we give up our time slice now.
991 * If we have to retry again, we do sleep a bit.
992 */
993 Sleep(delay[tries]);
994 tries++;
995 goto repeat;
996 }
997 errno = EACCES;
998 return -1;
999}
1000struct passwd *getpwuid(int uid)
1002{
1003 static char user_name[100];
1004 static struct passwd p;
1005 DWORD len = sizeof(user_name);
1007 if (!GetUserName(user_name, &len))
1008 return NULL;
1009 p.pw_name = user_name;
1010 p.pw_gecos = "unknown";
1011 p.pw_dir = NULL;
1012 return &p;
1013}
1014static HANDLE timer_event;
1016static HANDLE timer_thread;
1017static int timer_interval;
1018static int one_shot;
1019static sig_handler_t timer_fn = SIG_DFL;
1020/* The timer works like this:
1022 * The thread, ticktack(), is a trivial routine that most of the time
1023 * only waits to receive the signal to terminate. The main thread tells
1024 * the thread to terminate by setting the timer_event to the signalled
1025 * state.
1026 * But ticktack() interrupts the wait state after the timer's interval
1027 * length to call the signal handler.
1028 */
1029static __stdcall unsigned ticktack(void *dummy)
1031{
1032 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1033 if (timer_fn == SIG_DFL)
1034 die("Alarm");
1035 if (timer_fn != SIG_IGN)
1036 timer_fn(SIGALRM);
1037 if (one_shot)
1038 break;
1039 }
1040 return 0;
1041}
1042static int start_timer_thread(void)
1044{
1045 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1046 if (timer_event) {
1047 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1048 if (!timer_thread )
1049 return errno = ENOMEM,
1050 error("cannot start timer thread");
1051 } else
1052 return errno = ENOMEM,
1053 error("cannot allocate resources for timer");
1054 return 0;
1055}
1056static void stop_timer_thread(void)
1058{
1059 if (timer_event)
1060 SetEvent(timer_event); /* tell thread to terminate */
1061 if (timer_thread) {
1062 int rc = WaitForSingleObject(timer_thread, 1000);
1063 if (rc == WAIT_TIMEOUT)
1064 error("timer thread did not terminate timely");
1065 else if (rc != WAIT_OBJECT_0)
1066 error("waiting for timer thread failed: %lu",
1067 GetLastError());
1068 CloseHandle(timer_thread);
1069 }
1070 if (timer_event)
1071 CloseHandle(timer_event);
1072 timer_event = NULL;
1073 timer_thread = NULL;
1074}
1075static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1077{
1078 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1079}
1080int setitimer(int type, struct itimerval *in, struct itimerval *out)
1082{
1083 static const struct timeval zero;
1084 static int atexit_done;
1085 if (out != NULL)
1087 return errno = EINVAL,
1088 error("setitimer param 3 != NULL not implemented");
1089 if (!is_timeval_eq(&in->it_interval, &zero) &&
1090 !is_timeval_eq(&in->it_interval, &in->it_value))
1091 return errno = EINVAL,
1092 error("setitimer: it_interval must be zero or eq it_value");
1093 if (timer_thread)
1095 stop_timer_thread();
1096 if (is_timeval_eq(&in->it_value, &zero) &&
1098 is_timeval_eq(&in->it_interval, &zero))
1099 return 0;
1100 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1102 one_shot = is_timeval_eq(&in->it_interval, &zero);
1103 if (!atexit_done) {
1104 atexit(stop_timer_thread);
1105 atexit_done = 1;
1106 }
1107 return start_timer_thread();
1108}
1109int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1111{
1112 if (sig != SIGALRM)
1113 return errno = EINVAL,
1114 error("sigaction only implemented for SIGALRM");
1115 if (out != NULL)
1116 return errno = EINVAL,
1117 error("sigaction: param 3 != NULL not implemented");
1118 timer_fn = in->sa_handler;
1120 return 0;
1121}
1122#undef signal
1124sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1125{
1126 sig_handler_t old = timer_fn;
1127 if (sig != SIGALRM)
1128 return signal(sig, handler);
1129 timer_fn = handler;
1130 return old;
1131}
1132static const char *make_backslash_path(const char *path)
1134{
1135 static char buf[PATH_MAX + 1];
1136 char *c;
1137 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1139 die("Too long path: %.*s", 60, path);
1140 for (c = buf; *c; c++) {
1142 if (*c == '/')
1143 *c = '\\';
1144 }
1145 return buf;
1146}
1147void mingw_open_html(const char *unixpath)
1149{
1150 const char *htmlpath = make_backslash_path(unixpath);
1151 printf("Launching default browser to display HTML ...\n");
1152 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
1153}
1154int link(const char *oldpath, const char *newpath)
1156{
1157 typedef BOOL WINAPI (*T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1158 static T create_hard_link = NULL;
1159 if (!create_hard_link) {
1160 create_hard_link = (T) GetProcAddress(
1161 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1162 if (!create_hard_link)
1163 create_hard_link = (T)-1;
1164 }
1165 if (create_hard_link == (T)-1) {
1166 errno = ENOSYS;
1167 return -1;
1168 }
1169 if (!create_hard_link(newpath, oldpath, NULL)) {
1170 errno = err_win_to_posix(GetLastError());
1171 return -1;
1172 }
1173 return 0;
1174}
1175char *getpass(const char *prompt)
1177{
1178 struct strbuf buf = STRBUF_INIT;
1179 fputs(prompt, stderr);
1181 for (;;) {
1182 char c = _getch();
1183 if (c == '\r' || c == '\n')
1184 break;
1185 strbuf_addch(&buf, c);
1186 }
1187 fputs("\n", stderr);
1188 return strbuf_detach(&buf, NULL);
1189}
1190#ifndef NO_MINGW_REPLACE_READDIR
1192/* MinGW readdir implementation to avoid extra lstats for Git */
1193struct mingw_DIR
1194{
1195 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1196 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1197 long dd_handle; /* _findnext handle */
1198 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1199 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1200};
1201struct dirent *mingw_readdir(DIR *dir)
1203{
1204 WIN32_FIND_DATAA buf;
1205 HANDLE handle;
1206 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1207 if (!dir->dd_handle) {
1209 errno = EBADF; /* No set_errno for mingw */
1210 return NULL;
1211 }
1212 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1214 {
1215 DWORD lasterr;
1216 handle = FindFirstFileA(dir->dd_name, &buf);
1217 lasterr = GetLastError();
1218 dir->dd_handle = (long)handle;
1219 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1220 errno = err_win_to_posix(lasterr);
1221 return NULL;
1222 }
1223 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1224 return NULL;
1225 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1226 DWORD lasterr = GetLastError();
1227 FindClose((HANDLE)dir->dd_handle);
1228 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1229 /* POSIX says you shouldn't set errno when readdir can't
1230 find any more files; so, if another error we leave it set. */
1231 if (lasterr != ERROR_NO_MORE_FILES)
1232 errno = err_win_to_posix(lasterr);
1233 return NULL;
1234 }
1235 /* We get here if `buf' contains valid data. */
1237 strcpy(dir->dd_dir.d_name, buf.cFileName);
1238 ++dir->dd_stat;
1239 /* Set file type, based on WIN32_FIND_DATA */
1241 mdir->dd_dir.d_type = 0;
1242 if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1243 mdir->dd_dir.d_type |= DT_DIR;
1244 else
1245 mdir->dd_dir.d_type |= DT_REG;
1246 return (struct dirent*)&dir->dd_dir;
1248}
1249#endif // !NO_MINGW_REPLACE_READDIR