compat/mingw: Support a timeout in the poll emulation if no fds are given
[git/spearce.git] / compat / mingw.c
blob7eed60db1b10cc303f37e1bf3307058af94b8f9d
1 #include "../git-compat-util.h"
2 #include "../strbuf.h"
4 unsigned int _CRT_fmode = _O_BINARY;
6 #undef open
7 int mingw_open (const char *filename, int oflags, ...)
9 va_list args;
10 unsigned mode;
11 va_start(args, oflags);
12 mode = va_arg(args, int);
13 va_end(args);
15 if (!strcmp(filename, "/dev/null"))
16 filename = "nul";
17 int fd = open(filename, oflags, mode);
18 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
19 DWORD attrs = GetFileAttributes(filename);
20 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
21 errno = EISDIR;
23 return fd;
26 static inline time_t filetime_to_time_t(const FILETIME *ft)
28 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
29 winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
30 winTime /= 10000000; /* Nano to seconds resolution */
31 return (time_t)winTime;
34 extern int _getdrive( void );
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 (GetFileAttributesExA(file_name, GetFileExInfoStandard, &fdata)) {
44 int fMode = S_IREAD;
45 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
46 fMode |= S_IFDIR;
47 else
48 fMode |= S_IFREG;
49 if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
50 fMode |= S_IWRITE;
52 buf->st_ino = 0;
53 buf->st_gid = 0;
54 buf->st_uid = 0;
55 buf->st_nlink = 1;
56 buf->st_mode = fMode;
57 buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
58 buf->st_dev = buf->st_rdev = (_getdrive() - 1);
59 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
60 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
61 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
62 errno = 0;
63 return 0;
66 switch (GetLastError()) {
67 case ERROR_ACCESS_DENIED:
68 case ERROR_SHARING_VIOLATION:
69 case ERROR_LOCK_VIOLATION:
70 case ERROR_SHARING_BUFFER_EXCEEDED:
71 errno = EACCES;
72 break;
73 case ERROR_BUFFER_OVERFLOW:
74 errno = ENAMETOOLONG;
75 break;
76 case ERROR_NOT_ENOUGH_MEMORY:
77 errno = ENOMEM;
78 break;
79 default:
80 errno = ENOENT;
81 break;
83 return -1;
86 /* We provide our own lstat/fstat functions, since the provided
87 * lstat/fstat functions are so slow. These stat functions are
88 * tailored for Git's usage (read: fast), and are not meant to be
89 * complete. Note that Git stat()s are redirected to mingw_lstat()
90 * too, since Windows doesn't really handle symlinks that well.
92 int mingw_lstat(const char *file_name, struct stat *buf)
94 int namelen;
95 static char alt_name[PATH_MAX];
97 if (!do_lstat(file_name, buf))
98 return 0;
100 /* if file_name ended in a '/', Windows returned ENOENT;
101 * try again without trailing slashes
103 if (errno != ENOENT)
104 return -1;
106 namelen = strlen(file_name);
107 if (namelen && file_name[namelen-1] != '/')
108 return -1;
109 while (namelen && file_name[namelen-1] == '/')
110 --namelen;
111 if (!namelen || namelen >= PATH_MAX)
112 return -1;
114 memcpy(alt_name, file_name, namelen);
115 alt_name[namelen] = 0;
116 return do_lstat(alt_name, buf);
119 #undef fstat
120 int mingw_fstat(int fd, struct stat *buf)
122 HANDLE fh = (HANDLE)_get_osfhandle(fd);
123 BY_HANDLE_FILE_INFORMATION fdata;
125 if (fh == INVALID_HANDLE_VALUE) {
126 errno = EBADF;
127 return -1;
129 /* direct non-file handles to MS's fstat() */
130 if (GetFileType(fh) != FILE_TYPE_DISK)
131 return fstat(fd, buf);
133 if (GetFileInformationByHandle(fh, &fdata)) {
134 int fMode = S_IREAD;
135 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
136 fMode |= S_IFDIR;
137 else
138 fMode |= S_IFREG;
139 if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
140 fMode |= S_IWRITE;
142 buf->st_ino = 0;
143 buf->st_gid = 0;
144 buf->st_uid = 0;
145 buf->st_nlink = 1;
146 buf->st_mode = fMode;
147 buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
148 buf->st_dev = buf->st_rdev = (_getdrive() - 1);
149 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
150 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
151 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
152 return 0;
154 errno = EBADF;
155 return -1;
158 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
160 long long winTime = t * 10000000LL + 116444736000000000LL;
161 ft->dwLowDateTime = winTime;
162 ft->dwHighDateTime = winTime >> 32;
165 int mingw_utime (const char *file_name, const struct utimbuf *times)
167 FILETIME mft, aft;
168 int fh, rc;
170 /* must have write permission */
171 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
172 return -1;
174 time_t_to_filetime(times->modtime, &mft);
175 time_t_to_filetime(times->actime, &aft);
176 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
177 errno = EINVAL;
178 rc = -1;
179 } else
180 rc = 0;
181 close(fh);
182 return rc;
185 unsigned int sleep (unsigned int seconds)
187 Sleep(seconds*1000);
188 return 0;
191 int mkstemp(char *template)
193 char *filename = mktemp(template);
194 if (filename == NULL)
195 return -1;
196 return open(filename, O_RDWR | O_CREAT, 0600);
199 int gettimeofday(struct timeval *tv, void *tz)
201 SYSTEMTIME st;
202 struct tm tm;
203 GetSystemTime(&st);
204 tm.tm_year = st.wYear-1900;
205 tm.tm_mon = st.wMonth-1;
206 tm.tm_mday = st.wDay;
207 tm.tm_hour = st.wHour;
208 tm.tm_min = st.wMinute;
209 tm.tm_sec = st.wSecond;
210 tv->tv_sec = tm_to_time_t(&tm);
211 if (tv->tv_sec < 0)
212 return -1;
213 tv->tv_usec = st.wMilliseconds*1000;
214 return 0;
217 int pipe(int filedes[2])
219 int fd;
220 HANDLE h[2], parent;
222 if (_pipe(filedes, 8192, 0) < 0)
223 return -1;
225 parent = GetCurrentProcess();
227 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
228 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
229 close(filedes[0]);
230 close(filedes[1]);
231 return -1;
233 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
234 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
235 close(filedes[0]);
236 close(filedes[1]);
237 CloseHandle(h[0]);
238 return -1;
240 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
241 if (fd < 0) {
242 close(filedes[0]);
243 close(filedes[1]);
244 CloseHandle(h[0]);
245 CloseHandle(h[1]);
246 return -1;
248 close(filedes[0]);
249 filedes[0] = fd;
250 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
251 if (fd < 0) {
252 close(filedes[0]);
253 close(filedes[1]);
254 CloseHandle(h[1]);
255 return -1;
257 close(filedes[1]);
258 filedes[1] = fd;
259 return 0;
262 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
264 int i, pending;
266 if (timeout >= 0) {
267 if (nfds == 0) {
268 Sleep(timeout);
269 return 0;
271 return errno = EINVAL, error("poll timeout not supported");
274 /* When there is only one fd to wait for, then we pretend that
275 * input is available and let the actual wait happen when the
276 * caller invokes read().
278 if (nfds == 1) {
279 if (!(ufds[0].events & POLLIN))
280 return errno = EINVAL, error("POLLIN not set");
281 ufds[0].revents = POLLIN;
282 return 0;
285 repeat:
286 pending = 0;
287 for (i = 0; i < nfds; i++) {
288 DWORD avail = 0;
289 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
290 if (h == INVALID_HANDLE_VALUE)
291 return -1; /* errno was set */
293 if (!(ufds[i].events & POLLIN))
294 return errno = EINVAL, error("POLLIN not set");
296 /* this emulation works only for pipes */
297 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
298 int err = GetLastError();
299 if (err == ERROR_BROKEN_PIPE) {
300 ufds[i].revents = POLLHUP;
301 pending++;
302 } else {
303 errno = EINVAL;
304 return error("PeekNamedPipe failed,"
305 " GetLastError: %u", err);
307 } else if (avail) {
308 ufds[i].revents = POLLIN;
309 pending++;
310 } else
311 ufds[i].revents = 0;
313 if (!pending) {
314 /* The only times that we spin here is when the process
315 * that is connected through the pipes is waiting for
316 * its own input data to become available. But since
317 * the process (pack-objects) is itself CPU intensive,
318 * it will happily pick up the time slice that we are
319 * relinguishing here.
321 Sleep(0);
322 goto repeat;
324 return 0;
327 struct tm *gmtime_r(const time_t *timep, struct tm *result)
329 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
330 memcpy(result, gmtime(timep), sizeof(struct tm));
331 return result;
334 struct tm *localtime_r(const time_t *timep, struct tm *result)
336 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
337 memcpy(result, localtime(timep), sizeof(struct tm));
338 return result;
341 #undef getcwd
342 char *mingw_getcwd(char *pointer, int len)
344 int i;
345 char *ret = getcwd(pointer, len);
346 if (!ret)
347 return ret;
348 for (i = 0; pointer[i]; i++)
349 if (pointer[i] == '\\')
350 pointer[i] = '/';
351 return ret;
354 #undef getenv
355 char *mingw_getenv(const char *name)
357 char *result = getenv(name);
358 if (!result && !strcmp(name, "TMPDIR")) {
359 /* on Windows it is TMP and TEMP */
360 result = getenv("TMP");
361 if (!result)
362 result = getenv("TEMP");
364 return result;
368 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
369 * (Parsing C++ Command-Line Arguments)
371 static const char *quote_arg(const char *arg)
373 /* count chars to quote */
374 int len = 0, n = 0;
375 int force_quotes = 0;
376 char *q, *d;
377 const char *p = arg;
378 if (!*p) force_quotes = 1;
379 while (*p) {
380 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{')
381 force_quotes = 1;
382 else if (*p == '"')
383 n++;
384 else if (*p == '\\') {
385 int count = 0;
386 while (*p == '\\') {
387 count++;
388 p++;
389 len++;
391 if (*p == '"')
392 n += count*2 + 1;
393 continue;
395 len++;
396 p++;
398 if (!force_quotes && n == 0)
399 return arg;
401 /* insert \ where necessary */
402 d = q = xmalloc(len+n+3);
403 *d++ = '"';
404 while (*arg) {
405 if (*arg == '"')
406 *d++ = '\\';
407 else if (*arg == '\\') {
408 int count = 0;
409 while (*arg == '\\') {
410 count++;
411 *d++ = *arg++;
413 if (*arg == '"') {
414 while (count-- > 0)
415 *d++ = '\\';
416 *d++ = '\\';
419 *d++ = *arg++;
421 *d++ = '"';
422 *d++ = 0;
423 return q;
426 static const char *parse_interpreter(const char *cmd)
428 static char buf[100];
429 char *p, *opt;
430 int n, fd;
432 /* don't even try a .exe */
433 n = strlen(cmd);
434 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
435 return NULL;
437 fd = open(cmd, O_RDONLY);
438 if (fd < 0)
439 return NULL;
440 n = read(fd, buf, sizeof(buf)-1);
441 close(fd);
442 if (n < 4) /* at least '#!/x' and not error */
443 return NULL;
445 if (buf[0] != '#' || buf[1] != '!')
446 return NULL;
447 buf[n] = '\0';
448 p = strchr(buf, '\n');
449 if (!p)
450 return NULL;
452 *p = '\0';
453 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
454 return NULL;
455 /* strip options */
456 if ((opt = strchr(p+1, ' ')))
457 *opt = '\0';
458 return p+1;
462 * Splits the PATH into parts.
464 static char **get_path_split(void)
466 char *p, **path, *envpath = getenv("PATH");
467 int i, n = 0;
469 if (!envpath || !*envpath)
470 return NULL;
472 envpath = xstrdup(envpath);
473 p = envpath;
474 while (p) {
475 char *dir = p;
476 p = strchr(p, ';');
477 if (p) *p++ = '\0';
478 if (*dir) { /* not earlier, catches series of ; */
479 ++n;
482 if (!n)
483 return NULL;
485 path = xmalloc((n+1)*sizeof(char*));
486 p = envpath;
487 i = 0;
488 do {
489 if (*p)
490 path[i++] = xstrdup(p);
491 p = p+strlen(p)+1;
492 } while (i < n);
493 path[i] = NULL;
495 free(envpath);
497 return path;
500 static void free_path_split(char **path)
502 if (!path)
503 return;
505 char **p = path;
506 while (*p)
507 free(*p++);
508 free(path);
512 * exe_only means that we only want to detect .exe files, but not scripts
513 * (which do not have an extension)
515 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
517 char path[MAX_PATH];
518 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
520 if (!isexe && access(path, F_OK) == 0)
521 return xstrdup(path);
522 path[strlen(path)-4] = '\0';
523 if ((!exe_only || isexe) && access(path, F_OK) == 0)
524 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
525 return xstrdup(path);
526 return NULL;
530 * Determines the absolute path of cmd using the the split path in path.
531 * If cmd contains a slash or backslash, no lookup is performed.
533 static char *path_lookup(const char *cmd, char **path, int exe_only)
535 char *prog = NULL;
536 int len = strlen(cmd);
537 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
539 if (strchr(cmd, '/') || strchr(cmd, '\\'))
540 prog = xstrdup(cmd);
542 while (!prog && *path)
543 prog = lookup_prog(*path++, cmd, isexe, exe_only);
545 return prog;
548 static int env_compare(const void *a, const void *b)
550 char *const *ea = a;
551 char *const *eb = b;
552 return strcasecmp(*ea, *eb);
555 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
556 int prepend_cmd)
558 STARTUPINFO si;
559 PROCESS_INFORMATION pi;
560 struct strbuf envblk, args;
561 unsigned flags;
562 BOOL ret;
564 /* Determine whether or not we are associated to a console */
565 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
566 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
567 FILE_ATTRIBUTE_NORMAL, NULL);
568 if (cons == INVALID_HANDLE_VALUE) {
569 /* There is no console associated with this process.
570 * Since the child is a console process, Windows
571 * would normally create a console window. But
572 * since we'll be redirecting std streams, we do
573 * not need the console.
575 flags = CREATE_NO_WINDOW;
576 } else {
577 /* There is already a console. If we specified
578 * CREATE_NO_WINDOW here, too, Windows would
579 * disassociate the child from the console.
580 * Go figure!
582 flags = 0;
583 CloseHandle(cons);
585 memset(&si, 0, sizeof(si));
586 si.cb = sizeof(si);
587 si.dwFlags = STARTF_USESTDHANDLES;
588 si.hStdInput = (HANDLE) _get_osfhandle(0);
589 si.hStdOutput = (HANDLE) _get_osfhandle(1);
590 si.hStdError = (HANDLE) _get_osfhandle(2);
592 /* concatenate argv, quoting args as we go */
593 strbuf_init(&args, 0);
594 if (prepend_cmd) {
595 char *quoted = (char *)quote_arg(cmd);
596 strbuf_addstr(&args, quoted);
597 if (quoted != cmd)
598 free(quoted);
600 for (; *argv; argv++) {
601 char *quoted = (char *)quote_arg(*argv);
602 if (*args.buf)
603 strbuf_addch(&args, ' ');
604 strbuf_addstr(&args, quoted);
605 if (quoted != *argv)
606 free(quoted);
609 if (env) {
610 int count = 0;
611 char **e, **sorted_env;
613 for (e = env; *e; e++)
614 count++;
616 /* environment must be sorted */
617 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
618 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
619 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
621 strbuf_init(&envblk, 0);
622 for (e = sorted_env; *e; e++) {
623 strbuf_addstr(&envblk, *e);
624 strbuf_addch(&envblk, '\0');
626 free(sorted_env);
629 memset(&pi, 0, sizeof(pi));
630 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
631 env ? envblk.buf : NULL, NULL, &si, &pi);
633 if (env)
634 strbuf_release(&envblk);
635 strbuf_release(&args);
637 if (!ret) {
638 errno = ENOENT;
639 return -1;
641 CloseHandle(pi.hThread);
642 return (pid_t)pi.hProcess;
645 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
647 pid_t pid;
648 char **path = get_path_split();
649 char *prog = path_lookup(cmd, path, 0);
651 if (!prog) {
652 errno = ENOENT;
653 pid = -1;
655 else {
656 const char *interpr = parse_interpreter(prog);
658 if (interpr) {
659 const char *argv0 = argv[0];
660 char *iprog = path_lookup(interpr, path, 1);
661 argv[0] = prog;
662 if (!iprog) {
663 errno = ENOENT;
664 pid = -1;
666 else {
667 pid = mingw_spawnve(iprog, argv, env, 1);
668 free(iprog);
670 argv[0] = argv0;
672 else
673 pid = mingw_spawnve(prog, argv, env, 0);
674 free(prog);
676 free_path_split(path);
677 return pid;
680 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
682 const char *interpr = parse_interpreter(cmd);
683 char **path;
684 char *prog;
685 int pid = 0;
687 if (!interpr)
688 return 0;
689 path = get_path_split();
690 prog = path_lookup(interpr, path, 1);
691 if (prog) {
692 int argc = 0;
693 const char **argv2;
694 while (argv[argc]) argc++;
695 argv2 = xmalloc(sizeof(*argv) * (argc+1));
696 argv2[0] = (char *)cmd; /* full path to the script file */
697 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
698 pid = mingw_spawnve(prog, argv2, env, 1);
699 if (pid >= 0) {
700 int status;
701 if (waitpid(pid, &status, 0) < 0)
702 status = 255;
703 exit(status);
705 pid = 1; /* indicate that we tried but failed */
706 free(prog);
707 free(argv2);
709 free_path_split(path);
710 return pid;
713 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
715 /* check if git_command is a shell script */
716 if (!try_shell_exec(cmd, argv, (char **)env)) {
717 int pid, status;
719 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
720 if (pid < 0)
721 return;
722 if (waitpid(pid, &status, 0) < 0)
723 status = 255;
724 exit(status);
728 void mingw_execvp(const char *cmd, char *const *argv)
730 char **path = get_path_split();
731 char *prog = path_lookup(cmd, path, 0);
733 if (prog) {
734 mingw_execve(prog, argv, environ);
735 free(prog);
736 } else
737 errno = ENOENT;
739 free_path_split(path);
742 char **copy_environ()
744 char **env;
745 int i = 0;
746 while (environ[i])
747 i++;
748 env = xmalloc((i+1)*sizeof(*env));
749 for (i = 0; environ[i]; i++)
750 env[i] = xstrdup(environ[i]);
751 env[i] = NULL;
752 return env;
755 void free_environ(char **env)
757 int i;
758 for (i = 0; env[i]; i++)
759 free(env[i]);
760 free(env);
763 static int lookup_env(char **env, const char *name, size_t nmln)
765 int i;
767 for (i = 0; env[i]; i++) {
768 if (0 == strncmp(env[i], name, nmln)
769 && '=' == env[i][nmln])
770 /* matches */
771 return i;
773 return -1;
777 * If name contains '=', then sets the variable, otherwise it unsets it
779 char **env_setenv(char **env, const char *name)
781 char *eq = strchrnul(name, '=');
782 int i = lookup_env(env, name, eq-name);
784 if (i < 0) {
785 if (*eq) {
786 for (i = 0; env[i]; i++)
788 env = xrealloc(env, (i+2)*sizeof(*env));
789 env[i] = xstrdup(name);
790 env[i+1] = NULL;
793 else {
794 free(env[i]);
795 if (*eq)
796 env[i] = xstrdup(name);
797 else
798 for (; env[i]; i++)
799 env[i] = env[i+1];
801 return env;
804 /* this is the first function to call into WS_32; initialize it */
805 #undef gethostbyname
806 struct hostent *mingw_gethostbyname(const char *host)
808 WSADATA wsa;
810 if (WSAStartup(MAKEWORD(2,2), &wsa))
811 die("unable to initialize winsock subsystem, error %d",
812 WSAGetLastError());
813 atexit((void(*)(void)) WSACleanup);
814 return gethostbyname(host);
817 int mingw_socket(int domain, int type, int protocol)
819 int sockfd;
820 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
821 if (s == INVALID_SOCKET) {
823 * WSAGetLastError() values are regular BSD error codes
824 * biased by WSABASEERR.
825 * However, strerror() does not know about networking
826 * specific errors, which are values beginning at 38 or so.
827 * Therefore, we choose to leave the biased error code
828 * in errno so that _if_ someone looks up the code somewhere,
829 * then it is at least the number that are usually listed.
831 errno = WSAGetLastError();
832 return -1;
834 /* convert into a file descriptor */
835 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
836 closesocket(s);
837 return error("unable to make a socket file descriptor: %s",
838 strerror(errno));
840 return sockfd;
843 #undef connect
844 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
846 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
847 return connect(s, sa, sz);
850 #undef rename
851 int mingw_rename(const char *pold, const char *pnew)
854 * Try native rename() first to get errno right.
855 * It is based on MoveFile(), which cannot overwrite existing files.
857 if (!rename(pold, pnew))
858 return 0;
859 if (errno != EEXIST)
860 return -1;
861 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
862 return 0;
863 /* TODO: translate more errors */
864 if (GetLastError() == ERROR_ACCESS_DENIED) {
865 DWORD attrs = GetFileAttributes(pnew);
866 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
867 errno = EISDIR;
868 return -1;
871 errno = EACCES;
872 return -1;
875 struct passwd *getpwuid(int uid)
877 static char user_name[100];
878 static struct passwd p;
880 DWORD len = sizeof(user_name);
881 if (!GetUserName(user_name, &len))
882 return NULL;
883 p.pw_name = user_name;
884 p.pw_gecos = "unknown";
885 p.pw_dir = NULL;
886 return &p;
889 static HANDLE timer_event;
890 static HANDLE timer_thread;
891 static int timer_interval;
892 static int one_shot;
893 static sig_handler_t timer_fn = SIG_DFL;
895 /* The timer works like this:
896 * The thread, ticktack(), is a trivial routine that most of the time
897 * only waits to receive the signal to terminate. The main thread tells
898 * the thread to terminate by setting the timer_event to the signalled
899 * state.
900 * But ticktack() interrupts the wait state after the timer's interval
901 * length to call the signal handler.
904 static __stdcall unsigned ticktack(void *dummy)
906 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
907 if (timer_fn == SIG_DFL)
908 die("Alarm");
909 if (timer_fn != SIG_IGN)
910 timer_fn(SIGALRM);
911 if (one_shot)
912 break;
914 return 0;
917 static int start_timer_thread(void)
919 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
920 if (timer_event) {
921 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
922 if (!timer_thread )
923 return errno = ENOMEM,
924 error("cannot start timer thread");
925 } else
926 return errno = ENOMEM,
927 error("cannot allocate resources for timer");
928 return 0;
931 static void stop_timer_thread(void)
933 if (timer_event)
934 SetEvent(timer_event); /* tell thread to terminate */
935 if (timer_thread) {
936 int rc = WaitForSingleObject(timer_thread, 1000);
937 if (rc == WAIT_TIMEOUT)
938 error("timer thread did not terminate timely");
939 else if (rc != WAIT_OBJECT_0)
940 error("waiting for timer thread failed: %lu",
941 GetLastError());
942 CloseHandle(timer_thread);
944 if (timer_event)
945 CloseHandle(timer_event);
946 timer_event = NULL;
947 timer_thread = NULL;
950 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
952 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
955 int setitimer(int type, struct itimerval *in, struct itimerval *out)
957 static const struct timeval zero;
958 static int atexit_done;
960 if (out != NULL)
961 return errno = EINVAL,
962 error("setitimer param 3 != NULL not implemented");
963 if (!is_timeval_eq(&in->it_interval, &zero) &&
964 !is_timeval_eq(&in->it_interval, &in->it_value))
965 return errno = EINVAL,
966 error("setitimer: it_interval must be zero or eq it_value");
968 if (timer_thread)
969 stop_timer_thread();
971 if (is_timeval_eq(&in->it_value, &zero) &&
972 is_timeval_eq(&in->it_interval, &zero))
973 return 0;
975 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
976 one_shot = is_timeval_eq(&in->it_interval, &zero);
977 if (!atexit_done) {
978 atexit(stop_timer_thread);
979 atexit_done = 1;
981 return start_timer_thread();
984 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
986 if (sig != SIGALRM)
987 return errno = EINVAL,
988 error("sigaction only implemented for SIGALRM");
989 if (out != NULL)
990 return errno = EINVAL,
991 error("sigaction: param 3 != NULL not implemented");
993 timer_fn = in->sa_handler;
994 return 0;
997 #undef signal
998 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1000 if (sig != SIGALRM)
1001 return signal(sig, handler);
1002 sig_handler_t old = timer_fn;
1003 timer_fn = handler;
1004 return old;
1007 static const char *make_backslash_path(const char *path)
1009 static char buf[PATH_MAX + 1];
1010 char *c;
1012 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1013 die("Too long path: %.*s", 60, path);
1015 for (c = buf; *c; c++) {
1016 if (*c == '/')
1017 *c = '\\';
1019 return buf;
1022 void mingw_open_html(const char *unixpath)
1024 const char *htmlpath = make_backslash_path(unixpath);
1025 printf("Launching default browser to display HTML ...\n");
1026 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);