1 #include "../git-compat-util.h"
3 unsigned int _CRT_fmode = _O_BINARY;
5 #undef open
6 int mingw_open (const char *filename, int oflags, ...)
7 {
8 va_list args;
9 unsigned mode;
10 va_start(args, oflags);
11 mode = va_arg(args, int);
12 va_end(args);
14 if (!strcmp(filename, "/dev/null"))
15 filename = "nul";
16 int fd = open(filename, oflags, mode);
17 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
18 DWORD attrs = GetFileAttributes(filename);
19 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
20 errno = EISDIR;
21 }
22 return fd;
23 }
25 unsigned int sleep (unsigned int seconds)
26 {
27 Sleep(seconds*1000);
28 return 0;
29 }
31 int mkstemp(char *template)
32 {
33 char *filename = mktemp(template);
34 if (filename == NULL)
35 return -1;
36 return open(filename, O_RDWR | O_CREAT, 0600);
37 }
39 int gettimeofday(struct timeval *tv, void *tz)
40 {
41 SYSTEMTIME st;
42 struct tm tm;
43 GetSystemTime(&st);
44 tm.tm_year = st.wYear-1900;
45 tm.tm_mon = st.wMonth-1;
46 tm.tm_mday = st.wDay;
47 tm.tm_hour = st.wHour;
48 tm.tm_min = st.wMinute;
49 tm.tm_sec = st.wSecond;
50 tv->tv_sec = tm_to_time_t(&tm);
51 if (tv->tv_sec < 0)
52 return -1;
53 tv->tv_usec = st.wMilliseconds*1000;
54 return 0;
55 }
57 int pipe(int filedes[2])
58 {
59 int fd;
60 HANDLE h[2], parent;
62 if (_pipe(filedes, 8192, 0) < 0)
63 return -1;
65 parent = GetCurrentProcess();
67 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
68 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
69 close(filedes[0]);
70 close(filedes[1]);
71 return -1;
72 }
73 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
74 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
75 close(filedes[0]);
76 close(filedes[1]);
77 CloseHandle(h[0]);
78 return -1;
79 }
80 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
81 if (fd < 0) {
82 close(filedes[0]);
83 close(filedes[1]);
84 CloseHandle(h[0]);
85 CloseHandle(h[1]);
86 return -1;
87 }
88 close(filedes[0]);
89 filedes[0] = fd;
90 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
91 if (fd < 0) {
92 close(filedes[0]);
93 close(filedes[1]);
94 CloseHandle(h[1]);
95 return -1;
96 }
97 close(filedes[1]);
98 filedes[1] = fd;
99 return 0;
100 }
102 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
103 {
104 return -1;
105 }
107 struct tm *gmtime_r(const time_t *timep, struct tm *result)
108 {
109 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
110 memcpy(result, gmtime(timep), sizeof(struct tm));
111 return result;
112 }
114 struct tm *localtime_r(const time_t *timep, struct tm *result)
115 {
116 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
117 memcpy(result, localtime(timep), sizeof(struct tm));
118 return result;
119 }
121 #undef getcwd
122 char *mingw_getcwd(char *pointer, int len)
123 {
124 int i;
125 char *ret = getcwd(pointer, len);
126 if (!ret)
127 return ret;
128 for (i = 0; pointer[i]; i++)
129 if (pointer[i] == '\\')
130 pointer[i] = '/';
131 return ret;
132 }
134 static const char *parse_interpreter(const char *cmd)
135 {
136 static char buf[100];
137 char *p, *opt;
138 int n, fd;
140 /* don't even try a .exe */
141 n = strlen(cmd);
142 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
143 return NULL;
145 fd = open(cmd, O_RDONLY);
146 if (fd < 0)
147 return NULL;
148 n = read(fd, buf, sizeof(buf)-1);
149 close(fd);
150 if (n < 4) /* at least '#!/x' and not error */
151 return NULL;
153 if (buf[0] != '#' || buf[1] != '!')
154 return NULL;
155 buf[n] = '\0';
156 p = strchr(buf, '\n');
157 if (!p)
158 return NULL;
160 *p = '\0';
161 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
162 return NULL;
163 /* strip options */
164 if ((opt = strchr(p+1, ' ')))
165 *opt = '\0';
166 return p+1;
167 }
169 /*
170 * Splits the PATH into parts.
171 */
172 static char **get_path_split(void)
173 {
174 char *p, **path, *envpath = getenv("PATH");
175 int i, n = 0;
177 if (!envpath || !*envpath)
178 return NULL;
180 envpath = xstrdup(envpath);
181 p = envpath;
182 while (p) {
183 char *dir = p;
184 p = strchr(p, ';');
185 if (p) *p++ = '\0';
186 if (*dir) { /* not earlier, catches series of ; */
187 ++n;
188 }
189 }
190 if (!n)
191 return NULL;
193 path = xmalloc((n+1)*sizeof(char*));
194 p = envpath;
195 i = 0;
196 do {
197 if (*p)
198 path[i++] = xstrdup(p);
199 p = p+strlen(p)+1;
200 } while (i < n);
201 path[i] = NULL;
203 free(envpath);
205 return path;
206 }
208 static void free_path_split(char **path)
209 {
210 if (!path)
211 return;
213 char **p = path;
214 while (*p)
215 free(*p++);
216 free(path);
217 }
219 /*
220 * exe_only means that we only want to detect .exe files, but not scripts
221 * (which do not have an extension)
222 */
223 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
224 {
225 char path[MAX_PATH];
226 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
228 if (!isexe && access(path, F_OK) == 0)
229 return xstrdup(path);
230 path[strlen(path)-4] = '\0';
231 if ((!exe_only || isexe) && access(path, F_OK) == 0)
232 return xstrdup(path);
233 return NULL;
234 }
236 /*
237 * Determines the absolute path of cmd using the the split path in path.
238 * If cmd contains a slash or backslash, no lookup is performed.
239 */
240 static char *path_lookup(const char *cmd, char **path, int exe_only)
241 {
242 char *prog = NULL;
243 int len = strlen(cmd);
244 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
246 if (strchr(cmd, '/') || strchr(cmd, '\\'))
247 prog = xstrdup(cmd);
249 while (!prog && *path)
250 prog = lookup_prog(*path++, cmd, isexe, exe_only);
252 return prog;
253 }
255 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
256 {
257 const char *interpr = parse_interpreter(cmd);
258 char **path;
259 char *prog;
260 int pid = 0;
262 if (!interpr)
263 return 0;
264 path = get_path_split();
265 prog = path_lookup(interpr, path, 1);
266 if (prog) {
267 int argc = 0;
268 const char **argv2;
269 while (argv[argc]) argc++;
270 argv2 = xmalloc(sizeof(*argv) * (argc+2));
271 argv2[0] = (char *)interpr;
272 argv2[1] = (char *)cmd; /* full path to the script file */
273 memcpy(&argv2[2], &argv[1], sizeof(*argv) * argc);
274 pid = spawnve(_P_NOWAIT, prog, argv2, (const char **)env);
275 if (pid >= 0) {
276 int status;
277 if (waitpid(pid, &status, 0) < 0)
278 status = 255;
279 exit(status);
280 }
281 pid = 1; /* indicate that we tried but failed */
282 free(prog);
283 free(argv2);
284 }
285 free_path_split(path);
286 return pid;
287 }
289 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
290 {
291 /* check if git_command is a shell script */
292 if (!try_shell_exec(cmd, argv, (char **)env)) {
293 int pid, status;
295 pid = spawnve(_P_NOWAIT, cmd, (const char **)argv, (const char **)env);
296 if (pid < 0)
297 return;
298 if (waitpid(pid, &status, 0) < 0)
299 status = 255;
300 exit(status);
301 }
302 }
304 void mingw_execvp(const char *cmd, char *const *argv)
305 {
306 char **path = get_path_split();
307 char *prog = path_lookup(cmd, path, 0);
309 if (prog) {
310 mingw_execve(prog, argv, environ);
311 free(prog);
312 } else
313 errno = ENOENT;
315 free_path_split(path);
316 }
318 char **copy_environ()
319 {
320 char **env;
321 int i = 0;
322 while (environ[i])
323 i++;
324 env = xmalloc((i+1)*sizeof(*env));
325 for (i = 0; environ[i]; i++)
326 env[i] = xstrdup(environ[i]);
327 env[i] = NULL;
328 return env;
329 }
331 void free_environ(char **env)
332 {
333 int i;
334 for (i = 0; env[i]; i++)
335 free(env[i]);
336 free(env);
337 }
339 static int lookup_env(char **env, const char *name, size_t nmln)
340 {
341 int i;
343 for (i = 0; env[i]; i++) {
344 if (0 == strncmp(env[i], name, nmln)
345 && '=' == env[i][nmln])
346 /* matches */
347 return i;
348 }
349 return -1;
350 }
352 /*
353 * If name contains '=', then sets the variable, otherwise it unsets it
354 */
355 char **env_setenv(char **env, const char *name)
356 {
357 char *eq = strchrnul(name, '=');
358 int i = lookup_env(env, name, eq-name);
360 if (i < 0) {
361 if (*eq) {
362 for (i = 0; env[i]; i++)
363 ;
364 env = xrealloc(env, (i+2)*sizeof(*env));
365 env[i] = xstrdup(name);
366 env[i+1] = NULL;
367 }
368 }
369 else {
370 free(env[i]);
371 if (*eq)
372 env[i] = xstrdup(name);
373 else
374 for (; env[i]; i++)
375 env[i] = env[i+1];
376 }
377 return env;
378 }
380 #undef rename
381 int mingw_rename(const char *pold, const char *pnew)
382 {
383 /*
384 * Try native rename() first to get errno right.
385 * It is based on MoveFile(), which cannot overwrite existing files.
386 */
387 if (!rename(pold, pnew))
388 return 0;
389 if (errno != EEXIST)
390 return -1;
391 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
392 return 0;
393 /* TODO: translate more errors */
394 if (GetLastError() == ERROR_ACCESS_DENIED) {
395 DWORD attrs = GetFileAttributes(pnew);
396 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
397 errno = EISDIR;
398 return -1;
399 }
400 }
401 errno = EACCES;
402 return -1;
403 }
405 struct passwd *getpwuid(int uid)
406 {
407 static char user_name[100];
408 static struct passwd p;
410 DWORD len = sizeof(user_name);
411 if (!GetUserName(user_name, &len))
412 return NULL;
413 p.pw_name = user_name;
414 p.pw_gecos = "unknown";
415 p.pw_dir = NULL;
416 return &p;
417 }
419 static HANDLE timer_event;
420 static HANDLE timer_thread;
421 static int timer_interval;
422 static int one_shot;
423 static sig_handler_t timer_fn = SIG_DFL;
425 /* The timer works like this:
426 * The thread, ticktack(), is a trivial routine that most of the time
427 * only waits to receive the signal to terminate. The main thread tells
428 * the thread to terminate by setting the timer_event to the signalled
429 * state.
430 * But ticktack() interrupts the wait state after the timer's interval
431 * length to call the signal handler.
432 */
434 static __stdcall unsigned ticktack(void *dummy)
435 {
436 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
437 if (timer_fn == SIG_DFL)
438 die("Alarm");
439 if (timer_fn != SIG_IGN)
440 timer_fn(SIGALRM);
441 if (one_shot)
442 break;
443 }
444 return 0;
445 }
447 static int start_timer_thread(void)
448 {
449 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
450 if (timer_event) {
451 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
452 if (!timer_thread )
453 return errno = ENOMEM,
454 error("cannot start timer thread");
455 } else
456 return errno = ENOMEM,
457 error("cannot allocate resources for timer");
458 return 0;
459 }
461 static void stop_timer_thread(void)
462 {
463 if (timer_event)
464 SetEvent(timer_event); /* tell thread to terminate */
465 if (timer_thread) {
466 int rc = WaitForSingleObject(timer_thread, 1000);
467 if (rc == WAIT_TIMEOUT)
468 error("timer thread did not terminate timely");
469 else if (rc != WAIT_OBJECT_0)
470 error("waiting for timer thread failed: %lu",
471 GetLastError());
472 CloseHandle(timer_thread);
473 }
474 if (timer_event)
475 CloseHandle(timer_event);
476 timer_event = NULL;
477 timer_thread = NULL;
478 }
480 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
481 {
482 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
483 }
485 int setitimer(int type, struct itimerval *in, struct itimerval *out)
486 {
487 static const struct timeval zero;
488 static int atexit_done;
490 if (out != NULL)
491 return errno = EINVAL,
492 error("setitimer param 3 != NULL not implemented");
493 if (!is_timeval_eq(&in->it_interval, &zero) &&
494 !is_timeval_eq(&in->it_interval, &in->it_value))
495 return errno = EINVAL,
496 error("setitimer: it_interval must be zero or eq it_value");
498 if (timer_thread)
499 stop_timer_thread();
501 if (is_timeval_eq(&in->it_value, &zero) &&
502 is_timeval_eq(&in->it_interval, &zero))
503 return 0;
505 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
506 one_shot = is_timeval_eq(&in->it_interval, &zero);
507 if (!atexit_done) {
508 atexit(stop_timer_thread);
509 atexit_done = 1;
510 }
511 return start_timer_thread();
512 }
514 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
515 {
516 if (sig != SIGALRM)
517 return errno = EINVAL,
518 error("sigaction only implemented for SIGALRM");
519 if (out != NULL)
520 return errno = EINVAL,
521 error("sigaction: param 3 != NULL not implemented");
523 timer_fn = in->sa_handler;
524 return 0;
525 }
527 #undef signal
528 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
529 {
530 if (sig != SIGALRM)
531 return signal(sig, handler);
532 sig_handler_t old = timer_fn;
533 timer_fn = handler;
534 return old;
535 }