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config: add ctx arg to config_fn_t
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3ecd153a
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1#ifdef __MINGW64_VERSION_MAJOR
2#include <stdint.h>
3#include <wchar.h>
4typedef _sigset_t sigset_t;
5#endif
f4626df5 6#include <winsock2.h>
fe3b2b7b 7#include <ws2tcpip.h>
f4626df5 8
3ecd153a
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9/* MinGW-w64 reports to have flockfile, but it does not actually have it. */
10#ifdef __MINGW64_VERSION_MAJOR
11#undef _POSIX_THREAD_SAFE_FUNCTIONS
12#endif
13
a4e7e317
GC
14struct config_context;
15int mingw_core_config(const char *var, const char *value,
16 const struct config_context *ctx, void *cb);
70fc5793
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17#define platform_core_config mingw_core_config
18
f4626df5
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19/*
20 * things that are not available in header files
21 */
22
e7cf4e94 23typedef int uid_t;
772991af 24typedef int socklen_t;
3ecd153a
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25#ifndef __MINGW64_VERSION_MAJOR
26typedef int pid_t;
f4626df5 27#define hstrerror strerror
3ecd153a 28#endif
f4626df5
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29
30#define S_IFLNK 0120000 /* Symbolic link */
31#define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
32#define S_ISSOCK(x) 0
4091bfc9 33
59de49f8 34#ifndef S_IRWXG
f4626df5
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35#define S_IRGRP 0
36#define S_IWGRP 0
37#define S_IXGRP 0
4091bfc9 38#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
59de49f8
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39#endif
40#ifndef S_IRWXO
f4626df5 41#define S_IROTH 0
4091bfc9 42#define S_IWOTH 0
f4626df5 43#define S_IXOTH 0
4091bfc9 44#define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
59de49f8 45#endif
90110d76
RJ
46
47#define S_ISUID 0004000
48#define S_ISGID 0002000
49#define S_ISVTX 0001000
f4626df5 50
303e7c48
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51#define WIFEXITED(x) 1
52#define WIFSIGNALED(x) 0
f4626df5 53#define WEXITSTATUS(x) ((x) & 0xff)
303e7c48 54#define WTERMSIG(x) SIGTERM
f4626df5 55
61542f77 56#ifndef EWOULDBLOCK
419f37db 57#define EWOULDBLOCK EAGAIN
61542f77 58#endif
e0a064a1
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59#ifndef ELOOP
60#define ELOOP EMLINK
61#endif
419f37db
IL
62#define SHUT_WR SD_SEND
63
d2825065
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64#define SIGHUP 1
65#define SIGQUIT 3
66#define SIGKILL 9
67#define SIGPIPE 13
68#define SIGALRM 14
69#define SIGCHLD 17
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70
71#define F_GETFD 1
72#define F_SETFD 2
73#define FD_CLOEXEC 0x1
74
05d1ed61
BW
75#if !defined O_CLOEXEC && defined O_NOINHERIT
76#define O_CLOEXEC O_NOINHERIT
77#endif
78
61542f77 79#ifndef EAFNOSUPPORT
772991af 80#define EAFNOSUPPORT WSAEAFNOSUPPORT
61542f77
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81#endif
82#ifndef ECONNABORTED
772991af 83#define ECONNABORTED WSAECONNABORTED
61542f77 84#endif
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85#ifndef ENOTSOCK
86#define ENOTSOCK WSAENOTSOCK
87#endif
772991af 88
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89struct passwd {
90 char *pw_name;
91 char *pw_gecos;
92 char *pw_dir;
93};
94
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95typedef void (__cdecl *sig_handler_t)(int);
96struct sigaction {
97 sig_handler_t sa_handler;
98 unsigned sa_flags;
99};
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100#define SA_RESTART 0
101
102struct itimerval {
103 struct timeval it_value, it_interval;
104};
105#define ITIMER_REAL 0
106
7b6aff06
NTND
107struct utsname {
108 char sysname[16];
109 char nodename[1];
110 char release[16];
111 char version[16];
112 char machine[1];
113};
114
77df1f1e
ES
115/*
116 * sanitize preprocessor namespace polluted by Windows headers defining
117 * macros which collide with git local versions
118 */
119#undef HELP_COMMAND /* from winuser.h */
120
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121/*
122 * trivial stubs
123 */
124
125static inline int readlink(const char *path, char *buf, size_t bufsiz)
126{ errno = ENOSYS; return -1; }
127static inline int symlink(const char *oldpath, const char *newpath)
128{ errno = ENOSYS; return -1; }
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129static inline int fchmod(int fildes, mode_t mode)
130{ errno = ENOSYS; return -1; }
3ecd153a 131#ifndef __MINGW64_VERSION_MAJOR
f0c7fd49
JH
132static inline pid_t fork(void)
133{ errno = ENOSYS; return -1; }
3ecd153a 134#endif
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135static inline unsigned int alarm(unsigned int seconds)
136{ return 0; }
137static inline int fsync(int fd)
75f6929a 138{ return _commit(fd); }
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139static inline void sync(void)
140{}
e7cf4e94 141static inline uid_t getuid(void)
f4626df5
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142{ return 1; }
143static inline struct passwd *getpwnam(const char *name)
144{ return NULL; }
5f8763a8 145static inline int fcntl(int fd, int cmd, ...)
f4626df5
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146{
147 if (cmd == F_GETFD || cmd == F_SETFD)
148 return 0;
149 errno = EINVAL;
150 return -1;
151}
ee4512ed 152
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153#define sigemptyset(x) (void)0
154static inline int sigaddset(sigset_t *set, int signum)
155{ return 0; }
f924b52a 156#define SIG_BLOCK 0
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157#define SIG_UNBLOCK 0
158static inline int sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
159{ return 0; }
9a9a41db
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160static inline pid_t getppid(void)
161{ return 1; }
162static inline pid_t getpgid(pid_t pid)
163{ return pid == 0 ? getpid() : pid; }
164static inline pid_t tcgetpgrp(int fd)
165{ return getpid(); }
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166
167/*
168 * simple adaptors
169 */
170
85faec9d 171int mingw_mkdir(const char *path, int mode);
f4626df5
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172#define mkdir mingw_mkdir
173
ef7108ca 174#define WNOHANG 1
956d86d1 175pid_t waitpid(pid_t pid, int *status, int options);
f4626df5 176
82fc07b7
EFL
177#define kill mingw_kill
178int mingw_kill(pid_t pid, int sig);
179
514213bf
EFL
180#ifndef NO_OPENSSL
181#include <openssl/ssl.h>
182static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
183{
184 return SSL_set_fd(ssl, _get_osfhandle(fd));
185}
186#define SSL_set_fd mingw_SSL_set_fd
187
188static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
189{
190 return SSL_set_rfd(ssl, _get_osfhandle(fd));
191}
192#define SSL_set_rfd mingw_SSL_set_rfd
193
194static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
195{
196 return SSL_set_wfd(ssl, _get_osfhandle(fd));
197}
198#define SSL_set_wfd mingw_SSL_set_wfd
199#endif
200
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201/*
202 * implementations of missing functions
203 */
204
897bb8cb 205int pipe(int filedes[2]);
f4626df5
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206unsigned int sleep (unsigned int seconds);
207int mkstemp(char *template);
208int gettimeofday(struct timeval *tv, void *tz);
3ecd153a 209#ifndef __MINGW64_VERSION_MAJOR
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210struct tm *gmtime_r(const time_t *timep, struct tm *result);
211struct tm *localtime_r(const time_t *timep, struct tm *result);
3ecd153a 212#endif
f4626df5 213int getpagesize(void); /* defined in MinGW's libgcc.a */
e7cf4e94 214struct passwd *getpwuid(uid_t uid);
f4626df5
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215int setitimer(int type, struct itimerval *in, struct itimerval *out);
216int sigaction(int sig, struct sigaction *in, struct sigaction *out);
7be401e0 217int link(const char *oldpath, const char *newpath);
7b6aff06 218int uname(struct utsname *buf);
80ba074f 219
25fe217b
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220/*
221 * replacements of existing functions
222 */
223
337967fb
HV
224int mingw_unlink(const char *pathname);
225#define unlink mingw_unlink
226
4f288100
HV
227int mingw_rmdir(const char *path);
228#define rmdir mingw_rmdir
229
3e4a1ba0
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230int mingw_open (const char *filename, int oflags, ...);
231#define open mingw_open
2b081012 232#undef OPEN_RETURNS_EINTR
3e4a1ba0 233
176478a8
EFL
234int mingw_fgetc(FILE *stream);
235#define fgetc mingw_fgetc
236
3fdcdbdf
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237FILE *mingw_fopen (const char *filename, const char *otype);
238#define fopen mingw_fopen
239
240FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
241#define freopen mingw_freopen
242
84adb641
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243int mingw_fflush(FILE *stream);
244#define fflush mingw_fflush
245
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246ssize_t mingw_write(int fd, const void *buf, size_t len);
247#define write mingw_write
248
85faec9d
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249int mingw_access(const char *filename, int mode);
250#undef access
251#define access mingw_access
252
253int mingw_chdir(const char *dirname);
254#define chdir mingw_chdir
255
256int mingw_chmod(const char *filename, int mode);
257#define chmod mingw_chmod
258
259char *mingw_mktemp(char *template);
260#define mktemp mingw_mktemp
261
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262char *mingw_getcwd(char *pointer, int len);
263#define getcwd mingw_getcwd
264
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265#ifdef NO_UNSETENV
266#error "NO_UNSETENV is incompatible with the Windows-specific startup code!"
267#endif
268
269/*
270 * We bind *env() routines (even the mingw_ ones) to private mingw_ versions.
271 * These talk to the CRT using UNICODE/wchar_t, but maintain the original
272 * narrow-char API.
273 *
274 * Note that the MSCRT maintains both ANSI (getenv()) and UNICODE (_wgetenv())
275 * routines and stores both versions of each environment variable in parallel
276 * (and secretly updates both when you set one or the other), but it uses CP_ACP
277 * to do the conversion rather than CP_UTF8.
278 *
279 * Since everything in the git code base is UTF8, we define the mingw_ routines
280 * to access the CRT using the UNICODE routines and manually convert them to
281 * UTF8. This also avoids round-trip problems.
282 *
283 * This also helps with our linkage, since "_wenviron" is publicly exported
284 * from the CRT. But to access "_environ" we would have to statically link
285 * to the CRT (/MT).
286 *
287 * We require NO_SETENV (and let gitsetenv() call our mingw_putenv).
288 */
289#define getenv mingw_getenv
290#define putenv mingw_putenv
291#define unsetenv mingw_putenv
6fd6aec4 292char *mingw_getenv(const char *name);
fe21c6b2 293int mingw_putenv(const char *name);
6fd6aec4 294
13d24b01
PT
295int mingw_gethostname(char *host, int namelen);
296#define gethostname mingw_gethostname
297
746fb857
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298struct hostent *mingw_gethostbyname(const char *host);
299#define gethostbyname mingw_gethostbyname
300
fe3b2b7b
MS
301int mingw_getaddrinfo(const char *node, const char *service,
302 const struct addrinfo *hints, struct addrinfo **res);
303#define getaddrinfo mingw_getaddrinfo
304
746fb857
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305int mingw_socket(int domain, int type, int protocol);
306#define socket mingw_socket
307
308int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
309#define connect mingw_connect
310
772991af
MP
311int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
312#define bind mingw_bind
313
314int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
315#define setsockopt mingw_setsockopt
316
a7941795
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317int mingw_shutdown(int sockfd, int how);
318#define shutdown mingw_shutdown
319
772991af
MP
320int mingw_listen(int sockfd, int backlog);
321#define listen mingw_listen
322
323int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
324#define accept mingw_accept
325
ea9e98c3
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326int mingw_rename(const char*, const char*);
327#define rename mingw_rename
328
b1b95204 329#if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
b130a72b
JL
330int mingw_getpagesize(void);
331#define getpagesize mingw_getpagesize
332#endif
333
abf38abe
NS
334int win32_fsync_no_flush(int fd);
335#define fsync_no_flush win32_fsync_no_flush
336
8a94d833
NS
337#define FSYNC_COMPONENTS_PLATFORM_DEFAULT (FSYNC_COMPONENTS_DEFAULT | FSYNC_COMPONENT_LOOSE_OBJECT)
338#define FSYNC_METHOD_DEFAULT (FSYNC_METHOD_BATCH)
339
38abd9b8
EFL
340struct rlimit {
341 unsigned int rlim_cur;
342};
343#define RLIMIT_NOFILE 0
344
345static inline int getrlimit(int resource, struct rlimit *rlp)
346{
347 if (resource != RLIMIT_NOFILE) {
348 errno = EINVAL;
349 return -1;
350 }
351
352 rlp->rlim_cur = 2048;
353 return 0;
354}
355
a2374f58 356/*
d7e8c874
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357 * Use mingw specific stat()/lstat()/fstat() implementations on Windows,
358 * including our own struct stat with 64 bit st_size and nanosecond-precision
359 * file times.
5411bdc4 360 */
3ecd153a 361#ifndef __MINGW64_VERSION_MAJOR
1d4e4cd4 362#define off_t off64_t
1d4e4cd4 363#define lseek _lseeki64
172e54e2 364#ifndef _MSC_VER
d7e8c874
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365struct timespec {
366 time_t tv_sec;
367 long tv_nsec;
368};
3ecd153a 369#endif
172e54e2 370#endif
a2374f58 371
d7e8c874
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372struct mingw_stat {
373 _dev_t st_dev;
374 _ino_t st_ino;
375 _mode_t st_mode;
376 short st_nlink;
377 short st_uid;
378 short st_gid;
379 _dev_t st_rdev;
380 off64_t st_size;
381 struct timespec st_atim;
382 struct timespec st_mtim;
383 struct timespec st_ctim;
384};
385
386#define st_atime st_atim.tv_sec
387#define st_mtime st_mtim.tv_sec
388#define st_ctime st_ctim.tv_sec
389
fa93bb20
SS
390#ifdef stat
391#undef stat
392#endif
d7e8c874 393#define stat mingw_stat
180964f0 394int mingw_lstat(const char *file_name, struct stat *buf);
9b9784ca 395int mingw_stat(const char *file_name, struct stat *buf);
180964f0 396int mingw_fstat(int fd, struct stat *buf);
fa93bb20
SS
397#ifdef fstat
398#undef fstat
399#endif
5411bdc4 400#define fstat mingw_fstat
fa93bb20
SS
401#ifdef lstat
402#undef lstat
403#endif
5411bdc4 404#define lstat mingw_lstat
a2374f58 405
5411bdc4 406
7c0ffa1c
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407int mingw_utime(const char *file_name, const struct utimbuf *times);
408#define utime mingw_utime
9ee0540a
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409size_t mingw_strftime(char *s, size_t max,
410 const char *format, const struct tm *tm);
411#define strftime mingw_strftime
7c0ffa1c 412
75301f90 413pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
f9a2743c 414 const char *dir,
75301f90 415 int fhin, int fhout, int fherr);
1696d723 416int mingw_execvp(const char *cmd, char *const *argv);
f1a4dfb8 417#define execvp mingw_execvp
1696d723 418int mingw_execv(const char *cmd, char *const *argv);
5debf9a5 419#define execv mingw_execv
f1a4dfb8 420
cd800eec
SP
421static inline unsigned int git_ntohl(unsigned int x)
422{ return (unsigned int)ntohl(x); }
423#define ntohl git_ntohl
424
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425sig_handler_t mingw_signal(int sig, sig_handler_t handler);
426#define signal mingw_signal
427
176478a8
EFL
428int mingw_raise(int sig);
429#define raise mingw_raise
430
c09df8a7
PH
431/*
432 * ANSI emulation wrappers
433 */
434
cbb3f3c9
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435int winansi_isatty(int fd);
436#define isatty winansi_isatty
437
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438int winansi_dup2(int oldfd, int newfd);
439#define dup2 winansi_dup2
440
eac14f89 441void winansi_init(void);
eac14f89 442HANDLE winansi_get_osfhandle(int fd);
c09df8a7 443
80ba074f
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444/*
445 * git specific compatibility
446 */
447
5ca6b7bb
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448static inline void convert_slashes(char *path)
449{
450 for (; *path; path++)
451 if (*path == '\\')
452 *path = '/';
453}
80ba074f 454#define PATH_SEP ';'
7027f508 455char *mingw_query_user_email(void);
501afcb8 456#define query_user_email mingw_query_user_email
0ef60afd 457#if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
82f8d969 458#define PRIuMAX "I64u"
1562f3be 459#define PRId64 "I64d"
3ecd153a
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460#else
461#include <inttypes.h>
462#endif
ba26f296 463
bdc77d1d
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464/**
465 * Verifies that the specified path is owned by the user running the
466 * current process.
467 */
17d3883f 468int is_path_owned_by_current_sid(const char *path, struct strbuf *report);
bdc77d1d
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469#define is_path_owned_by_current_user is_path_owned_by_current_sid
470
d2c84dad
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471/**
472 * Verifies that the given path is a valid one on Windows.
473 *
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474 * In particular, path segments are disallowed which
475 *
476 * - end in a period or a space (except the special directories `.` and `..`).
477 *
478 * - contain any of the reserved characters, e.g. `:`, `;`, `*`, etc
d2c84dad 479 *
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480 * - correspond to reserved names (such as `AUX`, `PRN`, etc)
481 *
482 * The `allow_literal_nul` parameter controls whether the path `NUL` should
483 * be considered valid (this makes sense e.g. before opening files, as it is
484 * perfectly legitimate to open `NUL` on Windows, just as it is to open
485 * `/dev/null` on Unix/Linux).
486 *
d2c84dad
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487 * Returns 1 upon success, otherwise 0.
488 */
4dc42c6c
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489int is_valid_win32_path(const char *path, int allow_literal_nul);
490#define is_valid_path(path) is_valid_win32_path(path, 0)
d2c84dad 491
1c950a59
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492/**
493 * Converts UTF-8 encoded string to UTF-16LE.
494 *
495 * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
496 * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
497 * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
498 * Unicode) are converted to hex-code.
499 *
500 * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
501 * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
502 *
503 * Maximum space requirement for the target buffer is two wide chars per UTF-8
504 * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
505 *
506 * The maximum space is needed only if the entire input string consists of
507 * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
508 *
509 * | | UTF-8 | UTF-16 |
510 * Code point | UTF-8 sequence | bytes | words | ratio
511 * --------------+-------------------+-------+--------+-------
512 * 000000-00007f | 0-7f | 1 | 1 | 1
513 * 000080-0007ff | c2-df + 80-bf | 2 | 1 | 0.5
514 * 000800-00ffff | e0-ef + 2 * 80-bf | 3 | 1 | 0.33
515 * 010000-10ffff | f0-f4 + 3 * 80-bf | 4 | 2 (a) | 0.5
516 * invalid | 80-9f | 1 | 2 (b) | 2
517 * invalid | a0-ff | 1 | 1 | 1
518 *
519 * (a) encoded as UTF-16 surrogate pair
520 * (b) encoded as two hex digits
521 *
522 * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
523 * or even indefinite-byte sequences, the largest valid code point \u10ffff
524 * encodes as only 4 UTF-8 bytes.
525 *
526 * Parameters:
527 * wcs: wide char target buffer
528 * utf: string to convert
529 * wcslen: size of target buffer (in wchar_t's)
530 * utflen: size of string to convert, or -1 if 0-terminated
531 *
532 * Returns:
533 * length of converted string (_wcslen(wcs)), or -1 on failure
534 *
535 * Errors:
536 * EINVAL: one of the input parameters is invalid (e.g. NULL)
537 * ERANGE: the output buffer is too small
538 */
539int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
540
541/**
542 * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
543 */
544static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
545{
546 return xutftowcsn(wcs, utf, wcslen, -1);
547}
548
549/**
550 * Simplified file system specific variant of xutftowcsn, assumes output
551 * buffer size is MAX_PATH wide chars and input string is \0-terminated,
552 * fails with ENAMETOOLONG if input string is too long.
553 */
554static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
555{
556 int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
557 if (result < 0 && errno == ERANGE)
558 errno = ENAMETOOLONG;
559 return result;
560}
561
562/**
563 * Converts UTF-16LE encoded string to UTF-8.
564 *
565 * Maximum space requirement for the target buffer is three UTF-8 chars per
566 * wide char ((_wcslen(wcs) * 3) + 1).
567 *
568 * The maximum space is needed only if the entire input string consists of
569 * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
570 * modulo surrogate pairs), as per the following table:
571 *
572 * | | UTF-16 | UTF-8 |
573 * Code point | UTF-16 sequence | words | bytes | ratio
574 * --------------+-----------------------+--------+-------+-------
575 * 000000-00007f | 0000-007f | 1 | 1 | 1
576 * 000080-0007ff | 0080-07ff | 1 | 2 | 2
577 * 000800-00ffff | 0800-d7ff / e000-ffff | 1 | 3 | 3
578 * 010000-10ffff | d800-dbff + dc00-dfff | 2 | 4 | 2
579 *
580 * Note that invalid code points > 10ffff cannot be represented in UTF-16.
581 *
582 * Parameters:
583 * utf: target buffer
584 * wcs: wide string to convert
585 * utflen: size of target buffer
586 *
587 * Returns:
588 * length of converted string, or -1 on failure
589 *
590 * Errors:
591 * EINVAL: one of the input parameters is invalid (e.g. NULL)
592 * ERANGE: the output buffer is too small
593 */
594int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
595
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596/*
597 * A critical section used in the implementation of the spawn
15beaaa3 598 * functions (mingw_spawnv[p]e()) and waitpid(). Initialised in
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599 * the replacement main() macro below.
600 */
601extern CRITICAL_SECTION pinfo_cs;
602
35eeef47 603/*
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604 * Git, like most portable C applications, implements a main() function. On
605 * Windows, this main() function would receive parameters encoded in the
606 * current locale, but Git for Windows would prefer UTF-8 encoded parameters.
607 *
608 * To make that happen, we still declare main() here, and then declare and
609 * implement wmain() (which is the Unicode variant of main()) and compile with
610 * -municode. This wmain() function reencodes the parameters from UTF-16 to
611 * UTF-8 format, sets up a couple of other things as required on Windows, and
612 * then hands off to the main() function.
35eeef47 613 */
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614int wmain(int argc, const wchar_t **w_argv);
615int main(int argc, const char **argv);
e16c60d9 616
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617/*
618 * For debugging: if a problem occurs, say, in a Git process that is spawned
619 * from another Git process which in turn is spawned from yet another Git
620 * process, it can be quite daunting to figure out what is going on.
621 *
622 * Call this function to open a new MinTTY (this assumes you are in Git for
623 * Windows' SDK) with a GDB that attaches to the current process right away.
624 */
fcedb379 625void open_in_gdb(void);
08809c09 626
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627/*
628 * Used by Pthread API implementation for Windows
629 */
7027f508 630int err_win_to_posix(DWORD winerr);