Merge branch 'maint'
[git/trast.git] / compat / mingw.c
blob3dbe6a77ffa4675b19e7183fd49e11212cb2cda0
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include "../strbuf.h"
5 unsigned int _CRT_fmode = _O_BINARY;
7 #undef open
8 int mingw_open (const char *filename, int oflags, ...)
10 va_list args;
11 unsigned mode;
12 va_start(args, oflags);
13 mode = va_arg(args, int);
14 va_end(args);
16 if (!strcmp(filename, "/dev/null"))
17 filename = "nul";
18 int fd = open(filename, oflags, mode);
19 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
20 DWORD attrs = GetFileAttributes(filename);
21 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
22 errno = EISDIR;
24 return fd;
27 static inline time_t filetime_to_time_t(const FILETIME *ft)
29 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
30 winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
31 winTime /= 10000000; /* Nano to seconds resolution */
32 return (time_t)winTime;
35 /* We keep the do_lstat code in a separate function to avoid recursion.
36 * When a path ends with a slash, the stat will fail with ENOENT. In
37 * this case, we strip the trailing slashes and stat again.
39 static int do_lstat(const char *file_name, struct stat *buf)
41 WIN32_FILE_ATTRIBUTE_DATA fdata;
43 if (!(errno = get_file_attr(file_name, &fdata))) {
44 buf->st_ino = 0;
45 buf->st_gid = 0;
46 buf->st_uid = 0;
47 buf->st_nlink = 1;
48 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
49 buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
50 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
51 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
52 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
53 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
54 return 0;
56 return -1;
59 /* We provide our own lstat/fstat functions, since the provided
60 * lstat/fstat functions are so slow. These stat functions are
61 * tailored for Git's usage (read: fast), and are not meant to be
62 * complete. Note that Git stat()s are redirected to mingw_lstat()
63 * too, since Windows doesn't really handle symlinks that well.
65 int mingw_lstat(const char *file_name, struct stat *buf)
67 int namelen;
68 static char alt_name[PATH_MAX];
70 if (!do_lstat(file_name, buf))
71 return 0;
73 /* if file_name ended in a '/', Windows returned ENOENT;
74 * try again without trailing slashes
76 if (errno != ENOENT)
77 return -1;
79 namelen = strlen(file_name);
80 if (namelen && file_name[namelen-1] != '/')
81 return -1;
82 while (namelen && file_name[namelen-1] == '/')
83 --namelen;
84 if (!namelen || namelen >= PATH_MAX)
85 return -1;
87 memcpy(alt_name, file_name, namelen);
88 alt_name[namelen] = 0;
89 return do_lstat(alt_name, buf);
92 #undef fstat
93 int mingw_fstat(int fd, struct stat *buf)
95 HANDLE fh = (HANDLE)_get_osfhandle(fd);
96 BY_HANDLE_FILE_INFORMATION fdata;
98 if (fh == INVALID_HANDLE_VALUE) {
99 errno = EBADF;
100 return -1;
102 /* direct non-file handles to MS's fstat() */
103 if (GetFileType(fh) != FILE_TYPE_DISK)
104 return fstat(fd, buf);
106 if (GetFileInformationByHandle(fh, &fdata)) {
107 buf->st_ino = 0;
108 buf->st_gid = 0;
109 buf->st_uid = 0;
110 buf->st_nlink = 1;
111 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
112 buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
113 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
114 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
115 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
116 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
117 return 0;
119 errno = EBADF;
120 return -1;
123 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
125 long long winTime = t * 10000000LL + 116444736000000000LL;
126 ft->dwLowDateTime = winTime;
127 ft->dwHighDateTime = winTime >> 32;
130 int mingw_utime (const char *file_name, const struct utimbuf *times)
132 FILETIME mft, aft;
133 int fh, rc;
135 /* must have write permission */
136 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
137 return -1;
139 time_t_to_filetime(times->modtime, &mft);
140 time_t_to_filetime(times->actime, &aft);
141 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
142 errno = EINVAL;
143 rc = -1;
144 } else
145 rc = 0;
146 close(fh);
147 return rc;
150 unsigned int sleep (unsigned int seconds)
152 Sleep(seconds*1000);
153 return 0;
156 int mkstemp(char *template)
158 char *filename = mktemp(template);
159 if (filename == NULL)
160 return -1;
161 return open(filename, O_RDWR | O_CREAT, 0600);
164 int gettimeofday(struct timeval *tv, void *tz)
166 SYSTEMTIME st;
167 struct tm tm;
168 GetSystemTime(&st);
169 tm.tm_year = st.wYear-1900;
170 tm.tm_mon = st.wMonth-1;
171 tm.tm_mday = st.wDay;
172 tm.tm_hour = st.wHour;
173 tm.tm_min = st.wMinute;
174 tm.tm_sec = st.wSecond;
175 tv->tv_sec = tm_to_time_t(&tm);
176 if (tv->tv_sec < 0)
177 return -1;
178 tv->tv_usec = st.wMilliseconds*1000;
179 return 0;
182 int pipe(int filedes[2])
184 int fd;
185 HANDLE h[2], parent;
187 if (_pipe(filedes, 8192, 0) < 0)
188 return -1;
190 parent = GetCurrentProcess();
192 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
193 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
194 close(filedes[0]);
195 close(filedes[1]);
196 return -1;
198 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
199 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
200 close(filedes[0]);
201 close(filedes[1]);
202 CloseHandle(h[0]);
203 return -1;
205 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
206 if (fd < 0) {
207 close(filedes[0]);
208 close(filedes[1]);
209 CloseHandle(h[0]);
210 CloseHandle(h[1]);
211 return -1;
213 close(filedes[0]);
214 filedes[0] = fd;
215 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
216 if (fd < 0) {
217 close(filedes[0]);
218 close(filedes[1]);
219 CloseHandle(h[1]);
220 return -1;
222 close(filedes[1]);
223 filedes[1] = fd;
224 return 0;
227 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
229 int i, pending;
231 if (timeout >= 0) {
232 if (nfds == 0) {
233 Sleep(timeout);
234 return 0;
236 return errno = EINVAL, error("poll timeout not supported");
239 /* When there is only one fd to wait for, then we pretend that
240 * input is available and let the actual wait happen when the
241 * caller invokes read().
243 if (nfds == 1) {
244 if (!(ufds[0].events & POLLIN))
245 return errno = EINVAL, error("POLLIN not set");
246 ufds[0].revents = POLLIN;
247 return 0;
250 repeat:
251 pending = 0;
252 for (i = 0; i < nfds; i++) {
253 DWORD avail = 0;
254 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
255 if (h == INVALID_HANDLE_VALUE)
256 return -1; /* errno was set */
258 if (!(ufds[i].events & POLLIN))
259 return errno = EINVAL, error("POLLIN not set");
261 /* this emulation works only for pipes */
262 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
263 int err = GetLastError();
264 if (err == ERROR_BROKEN_PIPE) {
265 ufds[i].revents = POLLHUP;
266 pending++;
267 } else {
268 errno = EINVAL;
269 return error("PeekNamedPipe failed,"
270 " GetLastError: %u", err);
272 } else if (avail) {
273 ufds[i].revents = POLLIN;
274 pending++;
275 } else
276 ufds[i].revents = 0;
278 if (!pending) {
279 /* The only times that we spin here is when the process
280 * that is connected through the pipes is waiting for
281 * its own input data to become available. But since
282 * the process (pack-objects) is itself CPU intensive,
283 * it will happily pick up the time slice that we are
284 * relinguishing here.
286 Sleep(0);
287 goto repeat;
289 return 0;
292 struct tm *gmtime_r(const time_t *timep, struct tm *result)
294 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
295 memcpy(result, gmtime(timep), sizeof(struct tm));
296 return result;
299 struct tm *localtime_r(const time_t *timep, struct tm *result)
301 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
302 memcpy(result, localtime(timep), sizeof(struct tm));
303 return result;
306 #undef getcwd
307 char *mingw_getcwd(char *pointer, int len)
309 int i;
310 char *ret = getcwd(pointer, len);
311 if (!ret)
312 return ret;
313 for (i = 0; pointer[i]; i++)
314 if (pointer[i] == '\\')
315 pointer[i] = '/';
316 return ret;
319 #undef getenv
320 char *mingw_getenv(const char *name)
322 char *result = getenv(name);
323 if (!result && !strcmp(name, "TMPDIR")) {
324 /* on Windows it is TMP and TEMP */
325 result = getenv("TMP");
326 if (!result)
327 result = getenv("TEMP");
329 return result;
333 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
334 * (Parsing C++ Command-Line Arguments)
336 static const char *quote_arg(const char *arg)
338 /* count chars to quote */
339 int len = 0, n = 0;
340 int force_quotes = 0;
341 char *q, *d;
342 const char *p = arg;
343 if (!*p) force_quotes = 1;
344 while (*p) {
345 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{')
346 force_quotes = 1;
347 else if (*p == '"')
348 n++;
349 else if (*p == '\\') {
350 int count = 0;
351 while (*p == '\\') {
352 count++;
353 p++;
354 len++;
356 if (*p == '"')
357 n += count*2 + 1;
358 continue;
360 len++;
361 p++;
363 if (!force_quotes && n == 0)
364 return arg;
366 /* insert \ where necessary */
367 d = q = xmalloc(len+n+3);
368 *d++ = '"';
369 while (*arg) {
370 if (*arg == '"')
371 *d++ = '\\';
372 else if (*arg == '\\') {
373 int count = 0;
374 while (*arg == '\\') {
375 count++;
376 *d++ = *arg++;
378 if (*arg == '"') {
379 while (count-- > 0)
380 *d++ = '\\';
381 *d++ = '\\';
384 *d++ = *arg++;
386 *d++ = '"';
387 *d++ = 0;
388 return q;
391 static const char *parse_interpreter(const char *cmd)
393 static char buf[100];
394 char *p, *opt;
395 int n, fd;
397 /* don't even try a .exe */
398 n = strlen(cmd);
399 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
400 return NULL;
402 fd = open(cmd, O_RDONLY);
403 if (fd < 0)
404 return NULL;
405 n = read(fd, buf, sizeof(buf)-1);
406 close(fd);
407 if (n < 4) /* at least '#!/x' and not error */
408 return NULL;
410 if (buf[0] != '#' || buf[1] != '!')
411 return NULL;
412 buf[n] = '\0';
413 p = strchr(buf, '\n');
414 if (!p)
415 return NULL;
417 *p = '\0';
418 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
419 return NULL;
420 /* strip options */
421 if ((opt = strchr(p+1, ' ')))
422 *opt = '\0';
423 return p+1;
427 * Splits the PATH into parts.
429 static char **get_path_split(void)
431 char *p, **path, *envpath = getenv("PATH");
432 int i, n = 0;
434 if (!envpath || !*envpath)
435 return NULL;
437 envpath = xstrdup(envpath);
438 p = envpath;
439 while (p) {
440 char *dir = p;
441 p = strchr(p, ';');
442 if (p) *p++ = '\0';
443 if (*dir) { /* not earlier, catches series of ; */
444 ++n;
447 if (!n)
448 return NULL;
450 path = xmalloc((n+1)*sizeof(char*));
451 p = envpath;
452 i = 0;
453 do {
454 if (*p)
455 path[i++] = xstrdup(p);
456 p = p+strlen(p)+1;
457 } while (i < n);
458 path[i] = NULL;
460 free(envpath);
462 return path;
465 static void free_path_split(char **path)
467 if (!path)
468 return;
470 char **p = path;
471 while (*p)
472 free(*p++);
473 free(path);
477 * exe_only means that we only want to detect .exe files, but not scripts
478 * (which do not have an extension)
480 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
482 char path[MAX_PATH];
483 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
485 if (!isexe && access(path, F_OK) == 0)
486 return xstrdup(path);
487 path[strlen(path)-4] = '\0';
488 if ((!exe_only || isexe) && access(path, F_OK) == 0)
489 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
490 return xstrdup(path);
491 return NULL;
495 * Determines the absolute path of cmd using the the split path in path.
496 * If cmd contains a slash or backslash, no lookup is performed.
498 static char *path_lookup(const char *cmd, char **path, int exe_only)
500 char *prog = NULL;
501 int len = strlen(cmd);
502 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
504 if (strchr(cmd, '/') || strchr(cmd, '\\'))
505 prog = xstrdup(cmd);
507 while (!prog && *path)
508 prog = lookup_prog(*path++, cmd, isexe, exe_only);
510 return prog;
513 static int env_compare(const void *a, const void *b)
515 char *const *ea = a;
516 char *const *eb = b;
517 return strcasecmp(*ea, *eb);
520 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
521 int prepend_cmd)
523 STARTUPINFO si;
524 PROCESS_INFORMATION pi;
525 struct strbuf envblk, args;
526 unsigned flags;
527 BOOL ret;
529 /* Determine whether or not we are associated to a console */
530 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
531 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
532 FILE_ATTRIBUTE_NORMAL, NULL);
533 if (cons == INVALID_HANDLE_VALUE) {
534 /* There is no console associated with this process.
535 * Since the child is a console process, Windows
536 * would normally create a console window. But
537 * since we'll be redirecting std streams, we do
538 * not need the console.
539 * It is necessary to use DETACHED_PROCESS
540 * instead of CREATE_NO_WINDOW to make ssh
541 * recognize that it has no console.
543 flags = DETACHED_PROCESS;
544 } else {
545 /* There is already a console. If we specified
546 * DETACHED_PROCESS here, too, Windows would
547 * disassociate the child from the console.
548 * The same is true for CREATE_NO_WINDOW.
549 * Go figure!
551 flags = 0;
552 CloseHandle(cons);
554 memset(&si, 0, sizeof(si));
555 si.cb = sizeof(si);
556 si.dwFlags = STARTF_USESTDHANDLES;
557 si.hStdInput = (HANDLE) _get_osfhandle(0);
558 si.hStdOutput = (HANDLE) _get_osfhandle(1);
559 si.hStdError = (HANDLE) _get_osfhandle(2);
561 /* concatenate argv, quoting args as we go */
562 strbuf_init(&args, 0);
563 if (prepend_cmd) {
564 char *quoted = (char *)quote_arg(cmd);
565 strbuf_addstr(&args, quoted);
566 if (quoted != cmd)
567 free(quoted);
569 for (; *argv; argv++) {
570 char *quoted = (char *)quote_arg(*argv);
571 if (*args.buf)
572 strbuf_addch(&args, ' ');
573 strbuf_addstr(&args, quoted);
574 if (quoted != *argv)
575 free(quoted);
578 if (env) {
579 int count = 0;
580 char **e, **sorted_env;
582 for (e = env; *e; e++)
583 count++;
585 /* environment must be sorted */
586 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
587 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
588 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
590 strbuf_init(&envblk, 0);
591 for (e = sorted_env; *e; e++) {
592 strbuf_addstr(&envblk, *e);
593 strbuf_addch(&envblk, '\0');
595 free(sorted_env);
598 memset(&pi, 0, sizeof(pi));
599 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
600 env ? envblk.buf : NULL, NULL, &si, &pi);
602 if (env)
603 strbuf_release(&envblk);
604 strbuf_release(&args);
606 if (!ret) {
607 errno = ENOENT;
608 return -1;
610 CloseHandle(pi.hThread);
611 return (pid_t)pi.hProcess;
614 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
616 pid_t pid;
617 char **path = get_path_split();
618 char *prog = path_lookup(cmd, path, 0);
620 if (!prog) {
621 errno = ENOENT;
622 pid = -1;
624 else {
625 const char *interpr = parse_interpreter(prog);
627 if (interpr) {
628 const char *argv0 = argv[0];
629 char *iprog = path_lookup(interpr, path, 1);
630 argv[0] = prog;
631 if (!iprog) {
632 errno = ENOENT;
633 pid = -1;
635 else {
636 pid = mingw_spawnve(iprog, argv, env, 1);
637 free(iprog);
639 argv[0] = argv0;
641 else
642 pid = mingw_spawnve(prog, argv, env, 0);
643 free(prog);
645 free_path_split(path);
646 return pid;
649 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
651 const char *interpr = parse_interpreter(cmd);
652 char **path;
653 char *prog;
654 int pid = 0;
656 if (!interpr)
657 return 0;
658 path = get_path_split();
659 prog = path_lookup(interpr, path, 1);
660 if (prog) {
661 int argc = 0;
662 const char **argv2;
663 while (argv[argc]) argc++;
664 argv2 = xmalloc(sizeof(*argv) * (argc+1));
665 argv2[0] = (char *)cmd; /* full path to the script file */
666 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
667 pid = mingw_spawnve(prog, argv2, env, 1);
668 if (pid >= 0) {
669 int status;
670 if (waitpid(pid, &status, 0) < 0)
671 status = 255;
672 exit(status);
674 pid = 1; /* indicate that we tried but failed */
675 free(prog);
676 free(argv2);
678 free_path_split(path);
679 return pid;
682 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
684 /* check if git_command is a shell script */
685 if (!try_shell_exec(cmd, argv, (char **)env)) {
686 int pid, status;
688 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
689 if (pid < 0)
690 return;
691 if (waitpid(pid, &status, 0) < 0)
692 status = 255;
693 exit(status);
697 void mingw_execvp(const char *cmd, char *const *argv)
699 char **path = get_path_split();
700 char *prog = path_lookup(cmd, path, 0);
702 if (prog) {
703 mingw_execve(prog, argv, environ);
704 free(prog);
705 } else
706 errno = ENOENT;
708 free_path_split(path);
711 char **copy_environ()
713 char **env;
714 int i = 0;
715 while (environ[i])
716 i++;
717 env = xmalloc((i+1)*sizeof(*env));
718 for (i = 0; environ[i]; i++)
719 env[i] = xstrdup(environ[i]);
720 env[i] = NULL;
721 return env;
724 void free_environ(char **env)
726 int i;
727 for (i = 0; env[i]; i++)
728 free(env[i]);
729 free(env);
732 static int lookup_env(char **env, const char *name, size_t nmln)
734 int i;
736 for (i = 0; env[i]; i++) {
737 if (0 == strncmp(env[i], name, nmln)
738 && '=' == env[i][nmln])
739 /* matches */
740 return i;
742 return -1;
746 * If name contains '=', then sets the variable, otherwise it unsets it
748 char **env_setenv(char **env, const char *name)
750 char *eq = strchrnul(name, '=');
751 int i = lookup_env(env, name, eq-name);
753 if (i < 0) {
754 if (*eq) {
755 for (i = 0; env[i]; i++)
757 env = xrealloc(env, (i+2)*sizeof(*env));
758 env[i] = xstrdup(name);
759 env[i+1] = NULL;
762 else {
763 free(env[i]);
764 if (*eq)
765 env[i] = xstrdup(name);
766 else
767 for (; env[i]; i++)
768 env[i] = env[i+1];
770 return env;
773 /* this is the first function to call into WS_32; initialize it */
774 #undef gethostbyname
775 struct hostent *mingw_gethostbyname(const char *host)
777 WSADATA wsa;
779 if (WSAStartup(MAKEWORD(2,2), &wsa))
780 die("unable to initialize winsock subsystem, error %d",
781 WSAGetLastError());
782 atexit((void(*)(void)) WSACleanup);
783 return gethostbyname(host);
786 int mingw_socket(int domain, int type, int protocol)
788 int sockfd;
789 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
790 if (s == INVALID_SOCKET) {
792 * WSAGetLastError() values are regular BSD error codes
793 * biased by WSABASEERR.
794 * However, strerror() does not know about networking
795 * specific errors, which are values beginning at 38 or so.
796 * Therefore, we choose to leave the biased error code
797 * in errno so that _if_ someone looks up the code somewhere,
798 * then it is at least the number that are usually listed.
800 errno = WSAGetLastError();
801 return -1;
803 /* convert into a file descriptor */
804 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
805 closesocket(s);
806 return error("unable to make a socket file descriptor: %s",
807 strerror(errno));
809 return sockfd;
812 #undef connect
813 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
815 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
816 return connect(s, sa, sz);
819 #undef rename
820 int mingw_rename(const char *pold, const char *pnew)
822 DWORD attrs;
825 * Try native rename() first to get errno right.
826 * It is based on MoveFile(), which cannot overwrite existing files.
828 if (!rename(pold, pnew))
829 return 0;
830 if (errno != EEXIST)
831 return -1;
832 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
833 return 0;
834 /* TODO: translate more errors */
835 if (GetLastError() == ERROR_ACCESS_DENIED &&
836 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
837 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
838 errno = EISDIR;
839 return -1;
841 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
842 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
843 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
844 return 0;
845 /* revert file attributes on failure */
846 SetFileAttributes(pnew, attrs);
849 errno = EACCES;
850 return -1;
853 struct passwd *getpwuid(int uid)
855 static char user_name[100];
856 static struct passwd p;
858 DWORD len = sizeof(user_name);
859 if (!GetUserName(user_name, &len))
860 return NULL;
861 p.pw_name = user_name;
862 p.pw_gecos = "unknown";
863 p.pw_dir = NULL;
864 return &p;
867 static HANDLE timer_event;
868 static HANDLE timer_thread;
869 static int timer_interval;
870 static int one_shot;
871 static sig_handler_t timer_fn = SIG_DFL;
873 /* The timer works like this:
874 * The thread, ticktack(), is a trivial routine that most of the time
875 * only waits to receive the signal to terminate. The main thread tells
876 * the thread to terminate by setting the timer_event to the signalled
877 * state.
878 * But ticktack() interrupts the wait state after the timer's interval
879 * length to call the signal handler.
882 static __stdcall unsigned ticktack(void *dummy)
884 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
885 if (timer_fn == SIG_DFL)
886 die("Alarm");
887 if (timer_fn != SIG_IGN)
888 timer_fn(SIGALRM);
889 if (one_shot)
890 break;
892 return 0;
895 static int start_timer_thread(void)
897 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
898 if (timer_event) {
899 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
900 if (!timer_thread )
901 return errno = ENOMEM,
902 error("cannot start timer thread");
903 } else
904 return errno = ENOMEM,
905 error("cannot allocate resources for timer");
906 return 0;
909 static void stop_timer_thread(void)
911 if (timer_event)
912 SetEvent(timer_event); /* tell thread to terminate */
913 if (timer_thread) {
914 int rc = WaitForSingleObject(timer_thread, 1000);
915 if (rc == WAIT_TIMEOUT)
916 error("timer thread did not terminate timely");
917 else if (rc != WAIT_OBJECT_0)
918 error("waiting for timer thread failed: %lu",
919 GetLastError());
920 CloseHandle(timer_thread);
922 if (timer_event)
923 CloseHandle(timer_event);
924 timer_event = NULL;
925 timer_thread = NULL;
928 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
930 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
933 int setitimer(int type, struct itimerval *in, struct itimerval *out)
935 static const struct timeval zero;
936 static int atexit_done;
938 if (out != NULL)
939 return errno = EINVAL,
940 error("setitimer param 3 != NULL not implemented");
941 if (!is_timeval_eq(&in->it_interval, &zero) &&
942 !is_timeval_eq(&in->it_interval, &in->it_value))
943 return errno = EINVAL,
944 error("setitimer: it_interval must be zero or eq it_value");
946 if (timer_thread)
947 stop_timer_thread();
949 if (is_timeval_eq(&in->it_value, &zero) &&
950 is_timeval_eq(&in->it_interval, &zero))
951 return 0;
953 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
954 one_shot = is_timeval_eq(&in->it_interval, &zero);
955 if (!atexit_done) {
956 atexit(stop_timer_thread);
957 atexit_done = 1;
959 return start_timer_thread();
962 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
964 if (sig != SIGALRM)
965 return errno = EINVAL,
966 error("sigaction only implemented for SIGALRM");
967 if (out != NULL)
968 return errno = EINVAL,
969 error("sigaction: param 3 != NULL not implemented");
971 timer_fn = in->sa_handler;
972 return 0;
975 #undef signal
976 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
978 if (sig != SIGALRM)
979 return signal(sig, handler);
980 sig_handler_t old = timer_fn;
981 timer_fn = handler;
982 return old;
985 static const char *make_backslash_path(const char *path)
987 static char buf[PATH_MAX + 1];
988 char *c;
990 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
991 die("Too long path: %.*s", 60, path);
993 for (c = buf; *c; c++) {
994 if (*c == '/')
995 *c = '\\';
997 return buf;
1000 void mingw_open_html(const char *unixpath)
1002 const char *htmlpath = make_backslash_path(unixpath);
1003 printf("Launching default browser to display HTML ...\n");
1004 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);