| 1 | /* |
| 2 | * winsftp.c: the Windows-specific parts of PSFTP and PSCP. |
| 3 | */ |
| 4 | |
| 5 | #include <assert.h> |
| 6 | |
| 7 | #include "putty.h" |
| 8 | #include "psftp.h" |
| 9 | #include "int64.h" |
| 10 | |
| 11 | char *get_ttymode(void *frontend, const char *mode) { return NULL; } |
| 12 | |
| 13 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
| 14 | { |
| 15 | int ret; |
| 16 | ret = cmdline_get_passwd_input(p, in, inlen); |
| 17 | if (ret == -1) |
| 18 | ret = console_get_userpass_input(p, in, inlen); |
| 19 | return ret; |
| 20 | } |
| 21 | |
| 22 | /* ---------------------------------------------------------------------- |
| 23 | * File access abstraction. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * Set local current directory. Returns NULL on success, or else an |
| 28 | * error message which must be freed after printing. |
| 29 | */ |
| 30 | char *psftp_lcd(char *dir) |
| 31 | { |
| 32 | char *ret = NULL; |
| 33 | |
| 34 | if (!SetCurrentDirectory(dir)) { |
| 35 | LPVOID message; |
| 36 | int i; |
| 37 | FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| 38 | FORMAT_MESSAGE_FROM_SYSTEM | |
| 39 | FORMAT_MESSAGE_IGNORE_INSERTS, |
| 40 | NULL, GetLastError(), |
| 41 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| 42 | (LPTSTR)&message, 0, NULL); |
| 43 | i = strcspn((char *)message, "\n"); |
| 44 | ret = dupprintf("%.*s", i, (LPCTSTR)message); |
| 45 | LocalFree(message); |
| 46 | } |
| 47 | |
| 48 | return ret; |
| 49 | } |
| 50 | |
| 51 | /* |
| 52 | * Get local current directory. Returns a string which must be |
| 53 | * freed. |
| 54 | */ |
| 55 | char *psftp_getcwd(void) |
| 56 | { |
| 57 | char *ret = snewn(256, char); |
| 58 | int len = GetCurrentDirectory(256, ret); |
| 59 | if (len > 256) |
| 60 | ret = sresize(ret, len, char); |
| 61 | GetCurrentDirectory(len, ret); |
| 62 | return ret; |
| 63 | } |
| 64 | |
| 65 | #define TIME_POSIX_TO_WIN(t, ft) (*(LONGLONG*)&(ft) = \ |
| 66 | ((LONGLONG) (t) + (LONGLONG) 11644473600) * (LONGLONG) 10000000) |
| 67 | #define TIME_WIN_TO_POSIX(ft, t) ((t) = (unsigned long) \ |
| 68 | ((*(LONGLONG*)&(ft)) / (LONGLONG) 10000000 - (LONGLONG) 11644473600)) |
| 69 | |
| 70 | struct RFile { |
| 71 | HANDLE h; |
| 72 | }; |
| 73 | |
| 74 | RFile *open_existing_file(char *name, uint64 *size, |
| 75 | unsigned long *mtime, unsigned long *atime) |
| 76 | { |
| 77 | HANDLE h; |
| 78 | RFile *ret; |
| 79 | |
| 80 | h = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, |
| 81 | OPEN_EXISTING, 0, 0); |
| 82 | if (h == INVALID_HANDLE_VALUE) |
| 83 | return NULL; |
| 84 | |
| 85 | ret = snew(RFile); |
| 86 | ret->h = h; |
| 87 | |
| 88 | if (size) |
| 89 | size->lo=GetFileSize(h, &(size->hi)); |
| 90 | |
| 91 | if (mtime || atime) { |
| 92 | FILETIME actime, wrtime; |
| 93 | GetFileTime(h, NULL, &actime, &wrtime); |
| 94 | if (atime) |
| 95 | TIME_WIN_TO_POSIX(actime, *atime); |
| 96 | if (mtime) |
| 97 | TIME_WIN_TO_POSIX(wrtime, *mtime); |
| 98 | } |
| 99 | |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | int read_from_file(RFile *f, void *buffer, int length) |
| 104 | { |
| 105 | int ret, read; |
| 106 | ret = ReadFile(f->h, buffer, length, &read, NULL); |
| 107 | if (!ret) |
| 108 | return -1; /* error */ |
| 109 | else |
| 110 | return read; |
| 111 | } |
| 112 | |
| 113 | void close_rfile(RFile *f) |
| 114 | { |
| 115 | CloseHandle(f->h); |
| 116 | sfree(f); |
| 117 | } |
| 118 | |
| 119 | struct WFile { |
| 120 | HANDLE h; |
| 121 | }; |
| 122 | |
| 123 | WFile *open_new_file(char *name) |
| 124 | { |
| 125 | HANDLE h; |
| 126 | WFile *ret; |
| 127 | |
| 128 | h = CreateFile(name, GENERIC_WRITE, 0, NULL, |
| 129 | CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); |
| 130 | if (h == INVALID_HANDLE_VALUE) |
| 131 | return NULL; |
| 132 | |
| 133 | ret = snew(WFile); |
| 134 | ret->h = h; |
| 135 | |
| 136 | return ret; |
| 137 | } |
| 138 | |
| 139 | WFile *open_existing_wfile(char *name, uint64 *size) |
| 140 | { |
| 141 | HANDLE h; |
| 142 | WFile *ret; |
| 143 | |
| 144 | h = CreateFile(name, GENERIC_WRITE, FILE_SHARE_READ, NULL, |
| 145 | OPEN_EXISTING, 0, 0); |
| 146 | if (h == INVALID_HANDLE_VALUE) |
| 147 | return NULL; |
| 148 | |
| 149 | ret = snew(WFile); |
| 150 | ret->h = h; |
| 151 | |
| 152 | if (size) |
| 153 | size->lo=GetFileSize(h, &(size->hi)); |
| 154 | |
| 155 | return ret; |
| 156 | } |
| 157 | |
| 158 | int write_to_file(WFile *f, void *buffer, int length) |
| 159 | { |
| 160 | int ret, written; |
| 161 | ret = WriteFile(f->h, buffer, length, &written, NULL); |
| 162 | if (!ret) |
| 163 | return -1; /* error */ |
| 164 | else |
| 165 | return written; |
| 166 | } |
| 167 | |
| 168 | void set_file_times(WFile *f, unsigned long mtime, unsigned long atime) |
| 169 | { |
| 170 | FILETIME actime, wrtime; |
| 171 | TIME_POSIX_TO_WIN(atime, actime); |
| 172 | TIME_POSIX_TO_WIN(mtime, wrtime); |
| 173 | SetFileTime(f->h, NULL, &actime, &wrtime); |
| 174 | } |
| 175 | |
| 176 | void close_wfile(WFile *f) |
| 177 | { |
| 178 | CloseHandle(f->h); |
| 179 | sfree(f); |
| 180 | } |
| 181 | |
| 182 | /* Seek offset bytes through file, from whence, where whence is |
| 183 | FROM_START, FROM_CURRENT, or FROM_END */ |
| 184 | int seek_file(WFile *f, uint64 offset, int whence) |
| 185 | { |
| 186 | DWORD movemethod; |
| 187 | |
| 188 | switch (whence) { |
| 189 | case FROM_START: |
| 190 | movemethod = FILE_BEGIN; |
| 191 | break; |
| 192 | case FROM_CURRENT: |
| 193 | movemethod = FILE_CURRENT; |
| 194 | break; |
| 195 | case FROM_END: |
| 196 | movemethod = FILE_END; |
| 197 | break; |
| 198 | default: |
| 199 | return -1; |
| 200 | } |
| 201 | |
| 202 | SetFilePointer(f->h, offset.lo, &(offset.hi), movemethod); |
| 203 | |
| 204 | if (GetLastError() != NO_ERROR) |
| 205 | return -1; |
| 206 | else |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | uint64 get_file_posn(WFile *f) |
| 211 | { |
| 212 | uint64 ret; |
| 213 | |
| 214 | ret.hi = 0L; |
| 215 | ret.lo = SetFilePointer(f->h, 0L, &(ret.hi), FILE_CURRENT); |
| 216 | |
| 217 | return ret; |
| 218 | } |
| 219 | |
| 220 | int file_type(char *name) |
| 221 | { |
| 222 | DWORD attr; |
| 223 | attr = GetFileAttributes(name); |
| 224 | /* We know of no `weird' files under Windows. */ |
| 225 | if (attr == (DWORD)-1) |
| 226 | return FILE_TYPE_NONEXISTENT; |
| 227 | else if (attr & FILE_ATTRIBUTE_DIRECTORY) |
| 228 | return FILE_TYPE_DIRECTORY; |
| 229 | else |
| 230 | return FILE_TYPE_FILE; |
| 231 | } |
| 232 | |
| 233 | struct DirHandle { |
| 234 | HANDLE h; |
| 235 | char *name; |
| 236 | }; |
| 237 | |
| 238 | DirHandle *open_directory(char *name) |
| 239 | { |
| 240 | HANDLE h; |
| 241 | WIN32_FIND_DATA fdat; |
| 242 | char *findfile; |
| 243 | DirHandle *ret; |
| 244 | |
| 245 | /* Enumerate files in dir `foo'. */ |
| 246 | findfile = dupcat(name, "/*", NULL); |
| 247 | h = FindFirstFile(findfile, &fdat); |
| 248 | if (h == INVALID_HANDLE_VALUE) |
| 249 | return NULL; |
| 250 | sfree(findfile); |
| 251 | |
| 252 | ret = snew(DirHandle); |
| 253 | ret->h = h; |
| 254 | ret->name = dupstr(fdat.cFileName); |
| 255 | return ret; |
| 256 | } |
| 257 | |
| 258 | char *read_filename(DirHandle *dir) |
| 259 | { |
| 260 | do { |
| 261 | |
| 262 | if (!dir->name) { |
| 263 | WIN32_FIND_DATA fdat; |
| 264 | int ok = FindNextFile(dir->h, &fdat); |
| 265 | if (!ok) |
| 266 | return NULL; |
| 267 | else |
| 268 | dir->name = dupstr(fdat.cFileName); |
| 269 | } |
| 270 | |
| 271 | assert(dir->name); |
| 272 | if (dir->name[0] == '.' && |
| 273 | (dir->name[1] == '\0' || |
| 274 | (dir->name[1] == '.' && dir->name[2] == '\0'))) { |
| 275 | sfree(dir->name); |
| 276 | dir->name = NULL; |
| 277 | } |
| 278 | |
| 279 | } while (!dir->name); |
| 280 | |
| 281 | if (dir->name) { |
| 282 | char *ret = dir->name; |
| 283 | dir->name = NULL; |
| 284 | return ret; |
| 285 | } else |
| 286 | return NULL; |
| 287 | } |
| 288 | |
| 289 | void close_directory(DirHandle *dir) |
| 290 | { |
| 291 | FindClose(dir->h); |
| 292 | if (dir->name) |
| 293 | sfree(dir->name); |
| 294 | sfree(dir); |
| 295 | } |
| 296 | |
| 297 | int test_wildcard(char *name, int cmdline) |
| 298 | { |
| 299 | HANDLE fh; |
| 300 | WIN32_FIND_DATA fdat; |
| 301 | |
| 302 | /* First see if the exact name exists. */ |
| 303 | if (GetFileAttributes(name) != (DWORD)-1) |
| 304 | return WCTYPE_FILENAME; |
| 305 | |
| 306 | /* Otherwise see if a wildcard match finds anything. */ |
| 307 | fh = FindFirstFile(name, &fdat); |
| 308 | if (fh == INVALID_HANDLE_VALUE) |
| 309 | return WCTYPE_NONEXISTENT; |
| 310 | |
| 311 | FindClose(fh); |
| 312 | return WCTYPE_WILDCARD; |
| 313 | } |
| 314 | |
| 315 | struct WildcardMatcher { |
| 316 | HANDLE h; |
| 317 | char *name; |
| 318 | char *srcpath; |
| 319 | }; |
| 320 | |
| 321 | /* |
| 322 | * Return a pointer to the portion of str that comes after the last |
| 323 | * slash (or backslash or colon, if `local' is TRUE). |
| 324 | */ |
| 325 | static char *stripslashes(char *str, int local) |
| 326 | { |
| 327 | char *p; |
| 328 | |
| 329 | if (local) { |
| 330 | p = strchr(str, ':'); |
| 331 | if (p) str = p+1; |
| 332 | } |
| 333 | |
| 334 | p = strrchr(str, '/'); |
| 335 | if (p) str = p+1; |
| 336 | |
| 337 | if (local) { |
| 338 | p = strrchr(str, '\\'); |
| 339 | if (p) str = p+1; |
| 340 | } |
| 341 | |
| 342 | return str; |
| 343 | } |
| 344 | |
| 345 | WildcardMatcher *begin_wildcard_matching(char *name) |
| 346 | { |
| 347 | HANDLE h; |
| 348 | WIN32_FIND_DATA fdat; |
| 349 | WildcardMatcher *ret; |
| 350 | char *last; |
| 351 | |
| 352 | h = FindFirstFile(name, &fdat); |
| 353 | if (h == INVALID_HANDLE_VALUE) |
| 354 | return NULL; |
| 355 | |
| 356 | ret = snew(WildcardMatcher); |
| 357 | ret->h = h; |
| 358 | ret->srcpath = dupstr(name); |
| 359 | last = stripslashes(ret->srcpath, 1); |
| 360 | *last = '\0'; |
| 361 | if (fdat.cFileName[0] == '.' && |
| 362 | (fdat.cFileName[1] == '\0' || |
| 363 | (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0'))) |
| 364 | ret->name = NULL; |
| 365 | else |
| 366 | ret->name = dupcat(ret->srcpath, fdat.cFileName, NULL); |
| 367 | |
| 368 | return ret; |
| 369 | } |
| 370 | |
| 371 | char *wildcard_get_filename(WildcardMatcher *dir) |
| 372 | { |
| 373 | while (!dir->name) { |
| 374 | WIN32_FIND_DATA fdat; |
| 375 | int ok = FindNextFile(dir->h, &fdat); |
| 376 | |
| 377 | if (!ok) |
| 378 | return NULL; |
| 379 | |
| 380 | if (fdat.cFileName[0] == '.' && |
| 381 | (fdat.cFileName[1] == '\0' || |
| 382 | (fdat.cFileName[1] == '.' && fdat.cFileName[2] == '\0'))) |
| 383 | dir->name = NULL; |
| 384 | else |
| 385 | dir->name = dupcat(dir->srcpath, fdat.cFileName, NULL); |
| 386 | } |
| 387 | |
| 388 | if (dir->name) { |
| 389 | char *ret = dir->name; |
| 390 | dir->name = NULL; |
| 391 | return ret; |
| 392 | } else |
| 393 | return NULL; |
| 394 | } |
| 395 | |
| 396 | void finish_wildcard_matching(WildcardMatcher *dir) |
| 397 | { |
| 398 | FindClose(dir->h); |
| 399 | if (dir->name) |
| 400 | sfree(dir->name); |
| 401 | sfree(dir->srcpath); |
| 402 | sfree(dir); |
| 403 | } |
| 404 | |
| 405 | int vet_filename(char *name) |
| 406 | { |
| 407 | if (strchr(name, '/') || strchr(name, '\\') || strchr(name, ':')) |
| 408 | return FALSE; |
| 409 | |
| 410 | if (!name[strspn(name, ".")]) /* entirely composed of dots */ |
| 411 | return FALSE; |
| 412 | |
| 413 | return TRUE; |
| 414 | } |
| 415 | |
| 416 | int create_directory(char *name) |
| 417 | { |
| 418 | return CreateDirectory(name, NULL) != 0; |
| 419 | } |
| 420 | |
| 421 | char *dir_file_cat(char *dir, char *file) |
| 422 | { |
| 423 | return dupcat(dir, "\\", file, NULL); |
| 424 | } |
| 425 | |
| 426 | /* ---------------------------------------------------------------------- |
| 427 | * Platform-specific network handling. |
| 428 | */ |
| 429 | |
| 430 | /* |
| 431 | * Be told what socket we're supposed to be using. |
| 432 | */ |
| 433 | static SOCKET sftp_ssh_socket = INVALID_SOCKET; |
| 434 | static HANDLE netevent = NULL; |
| 435 | char *do_select(SOCKET skt, int startup) |
| 436 | { |
| 437 | int events; |
| 438 | if (startup) |
| 439 | sftp_ssh_socket = skt; |
| 440 | else |
| 441 | sftp_ssh_socket = INVALID_SOCKET; |
| 442 | |
| 443 | if (p_WSAEventSelect) { |
| 444 | if (startup) { |
| 445 | events = (FD_CONNECT | FD_READ | FD_WRITE | |
| 446 | FD_OOB | FD_CLOSE | FD_ACCEPT); |
| 447 | netevent = CreateEvent(NULL, FALSE, FALSE, NULL); |
| 448 | } else { |
| 449 | events = 0; |
| 450 | } |
| 451 | if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) { |
| 452 | switch (p_WSAGetLastError()) { |
| 453 | case WSAENETDOWN: |
| 454 | return "Network is down"; |
| 455 | default: |
| 456 | return "WSAEventSelect(): unknown error"; |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | return NULL; |
| 461 | } |
| 462 | extern int select_result(WPARAM, LPARAM); |
| 463 | |
| 464 | int do_eventsel_loop(HANDLE other_event) |
| 465 | { |
| 466 | int n, nhandles, nallhandles, netindex, otherindex; |
| 467 | long next, ticks; |
| 468 | HANDLE *handles; |
| 469 | SOCKET *sklist; |
| 470 | int skcount; |
| 471 | long now = GETTICKCOUNT(); |
| 472 | |
| 473 | if (run_timers(now, &next)) { |
| 474 | ticks = next - GETTICKCOUNT(); |
| 475 | if (ticks < 0) ticks = 0; /* just in case */ |
| 476 | } else { |
| 477 | ticks = INFINITE; |
| 478 | } |
| 479 | |
| 480 | handles = handle_get_events(&nhandles); |
| 481 | handles = sresize(handles, nhandles+2, HANDLE); |
| 482 | nallhandles = nhandles; |
| 483 | |
| 484 | if (netevent) |
| 485 | handles[netindex = nallhandles++] = netevent; |
| 486 | else |
| 487 | netindex = -1; |
| 488 | if (other_event) |
| 489 | handles[otherindex = nallhandles++] = other_event; |
| 490 | else |
| 491 | otherindex = -1; |
| 492 | |
| 493 | n = MsgWaitForMultipleObjects(nallhandles, handles, FALSE, ticks, |
| 494 | QS_POSTMESSAGE); |
| 495 | |
| 496 | if ((unsigned)(n - WAIT_OBJECT_0) < (unsigned)nhandles) { |
| 497 | handle_got_event(handles[n - WAIT_OBJECT_0]); |
| 498 | } else if (netindex >= 0 && n == WAIT_OBJECT_0 + netindex) { |
| 499 | WSANETWORKEVENTS things; |
| 500 | SOCKET socket; |
| 501 | extern SOCKET first_socket(int *), next_socket(int *); |
| 502 | extern int select_result(WPARAM, LPARAM); |
| 503 | int i, socketstate; |
| 504 | |
| 505 | /* |
| 506 | * We must not call select_result() for any socket |
| 507 | * until we have finished enumerating within the |
| 508 | * tree. This is because select_result() may close |
| 509 | * the socket and modify the tree. |
| 510 | */ |
| 511 | /* Count the active sockets. */ |
| 512 | i = 0; |
| 513 | for (socket = first_socket(&socketstate); |
| 514 | socket != INVALID_SOCKET; |
| 515 | socket = next_socket(&socketstate)) i++; |
| 516 | |
| 517 | /* Expand the buffer if necessary. */ |
| 518 | sklist = snewn(i, SOCKET); |
| 519 | |
| 520 | /* Retrieve the sockets into sklist. */ |
| 521 | skcount = 0; |
| 522 | for (socket = first_socket(&socketstate); |
| 523 | socket != INVALID_SOCKET; |
| 524 | socket = next_socket(&socketstate)) { |
| 525 | sklist[skcount++] = socket; |
| 526 | } |
| 527 | |
| 528 | /* Now we're done enumerating; go through the list. */ |
| 529 | for (i = 0; i < skcount; i++) { |
| 530 | WPARAM wp; |
| 531 | socket = sklist[i]; |
| 532 | wp = (WPARAM) socket; |
| 533 | if (!p_WSAEnumNetworkEvents(socket, NULL, &things)) { |
| 534 | static const struct { int bit, mask; } eventtypes[] = { |
| 535 | {FD_CONNECT_BIT, FD_CONNECT}, |
| 536 | {FD_READ_BIT, FD_READ}, |
| 537 | {FD_CLOSE_BIT, FD_CLOSE}, |
| 538 | {FD_OOB_BIT, FD_OOB}, |
| 539 | {FD_WRITE_BIT, FD_WRITE}, |
| 540 | {FD_ACCEPT_BIT, FD_ACCEPT}, |
| 541 | }; |
| 542 | int e; |
| 543 | |
| 544 | noise_ultralight(socket); |
| 545 | noise_ultralight(things.lNetworkEvents); |
| 546 | |
| 547 | for (e = 0; e < lenof(eventtypes); e++) |
| 548 | if (things.lNetworkEvents & eventtypes[e].mask) { |
| 549 | LPARAM lp; |
| 550 | int err = things.iErrorCode[eventtypes[e].bit]; |
| 551 | lp = WSAMAKESELECTREPLY(eventtypes[e].mask, err); |
| 552 | select_result(wp, lp); |
| 553 | } |
| 554 | } |
| 555 | } |
| 556 | |
| 557 | sfree(sklist); |
| 558 | } |
| 559 | |
| 560 | sfree(handles); |
| 561 | |
| 562 | if (n == WAIT_TIMEOUT) { |
| 563 | now = next; |
| 564 | } else { |
| 565 | now = GETTICKCOUNT(); |
| 566 | } |
| 567 | |
| 568 | if (otherindex >= 0 && n == WAIT_OBJECT_0 + otherindex) |
| 569 | return 1; |
| 570 | |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | /* |
| 575 | * Wait for some network data and process it. |
| 576 | * |
| 577 | * We have two variants of this function. One uses select() so that |
| 578 | * it's compatible with WinSock 1. The other uses WSAEventSelect |
| 579 | * and MsgWaitForMultipleObjects, so that we can consistently use |
| 580 | * WSAEventSelect throughout; this enables us to also implement |
| 581 | * ssh_sftp_get_cmdline() using a parallel mechanism. |
| 582 | */ |
| 583 | int ssh_sftp_loop_iteration(void) |
| 584 | { |
| 585 | if (p_WSAEventSelect == NULL) { |
| 586 | fd_set readfds; |
| 587 | int ret; |
| 588 | long now = GETTICKCOUNT(); |
| 589 | |
| 590 | if (sftp_ssh_socket == INVALID_SOCKET) |
| 591 | return -1; /* doom */ |
| 592 | |
| 593 | if (socket_writable(sftp_ssh_socket)) |
| 594 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_WRITE); |
| 595 | |
| 596 | do { |
| 597 | long next, ticks; |
| 598 | struct timeval tv, *ptv; |
| 599 | |
| 600 | if (run_timers(now, &next)) { |
| 601 | ticks = next - GETTICKCOUNT(); |
| 602 | if (ticks <= 0) |
| 603 | ticks = 1; /* just in case */ |
| 604 | tv.tv_sec = ticks / 1000; |
| 605 | tv.tv_usec = ticks % 1000 * 1000; |
| 606 | ptv = &tv; |
| 607 | } else { |
| 608 | ptv = NULL; |
| 609 | } |
| 610 | |
| 611 | FD_ZERO(&readfds); |
| 612 | FD_SET(sftp_ssh_socket, &readfds); |
| 613 | ret = p_select(1, &readfds, NULL, NULL, ptv); |
| 614 | |
| 615 | if (ret < 0) |
| 616 | return -1; /* doom */ |
| 617 | else if (ret == 0) |
| 618 | now = next; |
| 619 | else |
| 620 | now = GETTICKCOUNT(); |
| 621 | |
| 622 | } while (ret == 0); |
| 623 | |
| 624 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
| 625 | |
| 626 | return 0; |
| 627 | } else { |
| 628 | return do_eventsel_loop(NULL); |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * Read a command line from standard input. |
| 634 | * |
| 635 | * In the presence of WinSock 2, we can use WSAEventSelect to |
| 636 | * mediate between the socket and stdin, meaning we can send |
| 637 | * keepalives and respond to server events even while waiting at |
| 638 | * the PSFTP command prompt. Without WS2, we fall back to a simple |
| 639 | * fgets. |
| 640 | */ |
| 641 | struct command_read_ctx { |
| 642 | HANDLE event; |
| 643 | char *line; |
| 644 | }; |
| 645 | |
| 646 | static DWORD WINAPI command_read_thread(void *param) |
| 647 | { |
| 648 | struct command_read_ctx *ctx = (struct command_read_ctx *) param; |
| 649 | |
| 650 | ctx->line = fgetline(stdin); |
| 651 | |
| 652 | SetEvent(ctx->event); |
| 653 | |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok) |
| 658 | { |
| 659 | int ret; |
| 660 | struct command_read_ctx actx, *ctx = &actx; |
| 661 | DWORD threadid; |
| 662 | |
| 663 | fputs(prompt, stdout); |
| 664 | fflush(stdout); |
| 665 | |
| 666 | if ((sftp_ssh_socket == INVALID_SOCKET && no_fds_ok) || |
| 667 | p_WSAEventSelect == NULL) { |
| 668 | return fgetline(stdin); /* very simple */ |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Create a second thread to read from stdin. Process network |
| 673 | * and timing events until it terminates. |
| 674 | */ |
| 675 | ctx->event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| 676 | ctx->line = NULL; |
| 677 | |
| 678 | if (!CreateThread(NULL, 0, command_read_thread, |
| 679 | ctx, 0, &threadid)) { |
| 680 | fprintf(stderr, "Unable to create command input thread\n"); |
| 681 | cleanup_exit(1); |
| 682 | } |
| 683 | |
| 684 | do { |
| 685 | ret = do_eventsel_loop(ctx->event); |
| 686 | |
| 687 | /* Error return can only occur if netevent==NULL, and it ain't. */ |
| 688 | assert(ret >= 0); |
| 689 | } while (ret == 0); |
| 690 | |
| 691 | return ctx->line; |
| 692 | } |
| 693 | |
| 694 | /* ---------------------------------------------------------------------- |
| 695 | * Main program. Parse arguments etc. |
| 696 | */ |
| 697 | int main(int argc, char *argv[]) |
| 698 | { |
| 699 | int ret; |
| 700 | |
| 701 | ret = psftp_main(argc, argv); |
| 702 | |
| 703 | return ret; |
| 704 | } |