| 1 | /* |
| 2 | * uxsftp.c: the Unix-specific parts of PSFTP and PSCP. |
| 3 | */ |
| 4 | |
| 5 | #include <sys/time.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <fcntl.h> |
| 10 | #include <dirent.h> |
| 11 | #include <unistd.h> |
| 12 | #include <utime.h> |
| 13 | #include <errno.h> |
| 14 | #include <assert.h> |
| 15 | #include <glob.h> |
| 16 | #ifndef HAVE_NO_SYS_SELECT_H |
| 17 | #include <sys/select.h> |
| 18 | #endif |
| 19 | |
| 20 | #include "putty.h" |
| 21 | #include "ssh.h" |
| 22 | #include "psftp.h" |
| 23 | #include "int64.h" |
| 24 | |
| 25 | /* |
| 26 | * In PSFTP our selects are synchronous, so these functions are |
| 27 | * empty stubs. |
| 28 | */ |
| 29 | int uxsel_input_add(int fd, int rwx) { return 0; } |
| 30 | void uxsel_input_remove(int id) { } |
| 31 | |
| 32 | char *x_get_default(const char *key) |
| 33 | { |
| 34 | return NULL; /* this is a stub */ |
| 35 | } |
| 36 | |
| 37 | void platform_get_x11_auth(struct X11Display *display, const Config *cfg) |
| 38 | { |
| 39 | /* Do nothing, therefore no auth. */ |
| 40 | } |
| 41 | const int platform_uses_x11_unix_by_default = TRUE; |
| 42 | |
| 43 | /* |
| 44 | * Default settings that are specific to PSFTP. |
| 45 | */ |
| 46 | char *platform_default_s(const char *name) |
| 47 | { |
| 48 | return NULL; |
| 49 | } |
| 50 | |
| 51 | int platform_default_i(const char *name, int def) |
| 52 | { |
| 53 | return def; |
| 54 | } |
| 55 | |
| 56 | FontSpec platform_default_fontspec(const char *name) |
| 57 | { |
| 58 | FontSpec ret; |
| 59 | *ret.name = '\0'; |
| 60 | return ret; |
| 61 | } |
| 62 | |
| 63 | Filename platform_default_filename(const char *name) |
| 64 | { |
| 65 | Filename ret; |
| 66 | if (!strcmp(name, "LogFileName")) |
| 67 | strcpy(ret.path, "putty.log"); |
| 68 | else |
| 69 | *ret.path = '\0'; |
| 70 | return ret; |
| 71 | } |
| 72 | |
| 73 | char *get_ttymode(void *frontend, const char *mode) { return NULL; } |
| 74 | |
| 75 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
| 76 | { |
| 77 | int ret; |
| 78 | ret = cmdline_get_passwd_input(p, in, inlen); |
| 79 | if (ret == -1) |
| 80 | ret = console_get_userpass_input(p, in, inlen); |
| 81 | return ret; |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Set local current directory. Returns NULL on success, or else an |
| 86 | * error message which must be freed after printing. |
| 87 | */ |
| 88 | char *psftp_lcd(char *dir) |
| 89 | { |
| 90 | if (chdir(dir) < 0) |
| 91 | return dupprintf("%s: chdir: %s", dir, strerror(errno)); |
| 92 | else |
| 93 | return NULL; |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * Get local current directory. Returns a string which must be |
| 98 | * freed. |
| 99 | */ |
| 100 | char *psftp_getcwd(void) |
| 101 | { |
| 102 | char *buffer, *ret; |
| 103 | int size = 256; |
| 104 | |
| 105 | buffer = snewn(size, char); |
| 106 | while (1) { |
| 107 | ret = getcwd(buffer, size); |
| 108 | if (ret != NULL) |
| 109 | return ret; |
| 110 | if (errno != ERANGE) { |
| 111 | sfree(buffer); |
| 112 | return dupprintf("[cwd unavailable: %s]", strerror(errno)); |
| 113 | } |
| 114 | /* |
| 115 | * Otherwise, ERANGE was returned, meaning the buffer |
| 116 | * wasn't big enough. |
| 117 | */ |
| 118 | size = size * 3 / 2; |
| 119 | buffer = sresize(buffer, size, char); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | struct RFile { |
| 124 | int fd; |
| 125 | }; |
| 126 | |
| 127 | RFile *open_existing_file(char *name, uint64 *size, |
| 128 | unsigned long *mtime, unsigned long *atime) |
| 129 | { |
| 130 | int fd; |
| 131 | RFile *ret; |
| 132 | |
| 133 | fd = open(name, O_RDONLY); |
| 134 | if (fd < 0) |
| 135 | return NULL; |
| 136 | |
| 137 | ret = snew(RFile); |
| 138 | ret->fd = fd; |
| 139 | |
| 140 | if (size || mtime || atime) { |
| 141 | struct stat statbuf; |
| 142 | if (fstat(fd, &statbuf) < 0) { |
| 143 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
| 144 | memset(&statbuf, 0, sizeof(statbuf)); |
| 145 | } |
| 146 | |
| 147 | if (size) |
| 148 | *size = uint64_make((statbuf.st_size >> 16) >> 16, |
| 149 | statbuf.st_size); |
| 150 | |
| 151 | if (mtime) |
| 152 | *mtime = statbuf.st_mtime; |
| 153 | |
| 154 | if (atime) |
| 155 | *atime = statbuf.st_atime; |
| 156 | } |
| 157 | |
| 158 | return ret; |
| 159 | } |
| 160 | |
| 161 | int read_from_file(RFile *f, void *buffer, int length) |
| 162 | { |
| 163 | return read(f->fd, buffer, length); |
| 164 | } |
| 165 | |
| 166 | void close_rfile(RFile *f) |
| 167 | { |
| 168 | close(f->fd); |
| 169 | sfree(f); |
| 170 | } |
| 171 | |
| 172 | struct WFile { |
| 173 | int fd; |
| 174 | char *name; |
| 175 | }; |
| 176 | |
| 177 | WFile *open_new_file(char *name) |
| 178 | { |
| 179 | int fd; |
| 180 | WFile *ret; |
| 181 | |
| 182 | fd = open(name, O_CREAT | O_TRUNC | O_WRONLY, 0666); |
| 183 | if (fd < 0) |
| 184 | return NULL; |
| 185 | |
| 186 | ret = snew(WFile); |
| 187 | ret->fd = fd; |
| 188 | ret->name = dupstr(name); |
| 189 | |
| 190 | return ret; |
| 191 | } |
| 192 | |
| 193 | |
| 194 | WFile *open_existing_wfile(char *name, uint64 *size) |
| 195 | { |
| 196 | int fd; |
| 197 | WFile *ret; |
| 198 | |
| 199 | fd = open(name, O_APPEND | O_WRONLY); |
| 200 | if (fd < 0) |
| 201 | return NULL; |
| 202 | |
| 203 | ret = snew(WFile); |
| 204 | ret->fd = fd; |
| 205 | ret->name = dupstr(name); |
| 206 | |
| 207 | if (size) { |
| 208 | struct stat statbuf; |
| 209 | if (fstat(fd, &statbuf) < 0) { |
| 210 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
| 211 | memset(&statbuf, 0, sizeof(statbuf)); |
| 212 | } |
| 213 | |
| 214 | *size = uint64_make((statbuf.st_size >> 16) >> 16, |
| 215 | statbuf.st_size); |
| 216 | } |
| 217 | |
| 218 | return ret; |
| 219 | } |
| 220 | |
| 221 | int write_to_file(WFile *f, void *buffer, int length) |
| 222 | { |
| 223 | char *p = (char *)buffer; |
| 224 | int so_far = 0; |
| 225 | |
| 226 | /* Keep trying until we've really written as much as we can. */ |
| 227 | while (length > 0) { |
| 228 | int ret = write(f->fd, p, length); |
| 229 | |
| 230 | if (ret < 0) |
| 231 | return ret; |
| 232 | |
| 233 | if (ret == 0) |
| 234 | break; |
| 235 | |
| 236 | p += ret; |
| 237 | length -= ret; |
| 238 | so_far += ret; |
| 239 | } |
| 240 | |
| 241 | return so_far; |
| 242 | } |
| 243 | |
| 244 | void set_file_times(WFile *f, unsigned long mtime, unsigned long atime) |
| 245 | { |
| 246 | struct utimbuf ut; |
| 247 | |
| 248 | ut.actime = atime; |
| 249 | ut.modtime = mtime; |
| 250 | |
| 251 | utime(f->name, &ut); |
| 252 | } |
| 253 | |
| 254 | /* Closes and frees the WFile */ |
| 255 | void close_wfile(WFile *f) |
| 256 | { |
| 257 | close(f->fd); |
| 258 | sfree(f->name); |
| 259 | sfree(f); |
| 260 | } |
| 261 | |
| 262 | /* Seek offset bytes through file, from whence, where whence is |
| 263 | FROM_START, FROM_CURRENT, or FROM_END */ |
| 264 | int seek_file(WFile *f, uint64 offset, int whence) |
| 265 | { |
| 266 | off_t fileofft; |
| 267 | int lseek_whence; |
| 268 | |
| 269 | fileofft = (((off_t) offset.hi << 16) << 16) + offset.lo; |
| 270 | |
| 271 | switch (whence) { |
| 272 | case FROM_START: |
| 273 | lseek_whence = SEEK_SET; |
| 274 | break; |
| 275 | case FROM_CURRENT: |
| 276 | lseek_whence = SEEK_CUR; |
| 277 | break; |
| 278 | case FROM_END: |
| 279 | lseek_whence = SEEK_END; |
| 280 | break; |
| 281 | default: |
| 282 | return -1; |
| 283 | } |
| 284 | |
| 285 | return lseek(f->fd, fileofft, lseek_whence) >= 0 ? 0 : -1; |
| 286 | } |
| 287 | |
| 288 | uint64 get_file_posn(WFile *f) |
| 289 | { |
| 290 | off_t fileofft; |
| 291 | uint64 ret; |
| 292 | |
| 293 | fileofft = lseek(f->fd, (off_t) 0, SEEK_CUR); |
| 294 | |
| 295 | ret = uint64_make((fileofft >> 16) >> 16, fileofft); |
| 296 | |
| 297 | return ret; |
| 298 | } |
| 299 | |
| 300 | int file_type(char *name) |
| 301 | { |
| 302 | struct stat statbuf; |
| 303 | |
| 304 | if (stat(name, &statbuf) < 0) { |
| 305 | if (errno != ENOENT) |
| 306 | fprintf(stderr, "%s: stat: %s\n", name, strerror(errno)); |
| 307 | return FILE_TYPE_NONEXISTENT; |
| 308 | } |
| 309 | |
| 310 | if (S_ISREG(statbuf.st_mode)) |
| 311 | return FILE_TYPE_FILE; |
| 312 | |
| 313 | if (S_ISDIR(statbuf.st_mode)) |
| 314 | return FILE_TYPE_DIRECTORY; |
| 315 | |
| 316 | return FILE_TYPE_WEIRD; |
| 317 | } |
| 318 | |
| 319 | struct DirHandle { |
| 320 | DIR *dir; |
| 321 | }; |
| 322 | |
| 323 | DirHandle *open_directory(char *name) |
| 324 | { |
| 325 | DIR *dir; |
| 326 | DirHandle *ret; |
| 327 | |
| 328 | dir = opendir(name); |
| 329 | if (!dir) |
| 330 | return NULL; |
| 331 | |
| 332 | ret = snew(DirHandle); |
| 333 | ret->dir = dir; |
| 334 | return ret; |
| 335 | } |
| 336 | |
| 337 | char *read_filename(DirHandle *dir) |
| 338 | { |
| 339 | struct dirent *de; |
| 340 | |
| 341 | do { |
| 342 | de = readdir(dir->dir); |
| 343 | if (de == NULL) |
| 344 | return NULL; |
| 345 | } while ((de->d_name[0] == '.' && |
| 346 | (de->d_name[1] == '\0' || |
| 347 | (de->d_name[1] == '.' && de->d_name[2] == '\0')))); |
| 348 | |
| 349 | return dupstr(de->d_name); |
| 350 | } |
| 351 | |
| 352 | void close_directory(DirHandle *dir) |
| 353 | { |
| 354 | closedir(dir->dir); |
| 355 | sfree(dir); |
| 356 | } |
| 357 | |
| 358 | int test_wildcard(char *name, int cmdline) |
| 359 | { |
| 360 | struct stat statbuf; |
| 361 | |
| 362 | if (stat(name, &statbuf) == 0) { |
| 363 | return WCTYPE_FILENAME; |
| 364 | } else if (cmdline) { |
| 365 | /* |
| 366 | * On Unix, we never need to parse wildcards coming from |
| 367 | * the command line, because the shell will have expanded |
| 368 | * them into a filename list already. |
| 369 | */ |
| 370 | return WCTYPE_NONEXISTENT; |
| 371 | } else { |
| 372 | glob_t globbed; |
| 373 | int ret = WCTYPE_NONEXISTENT; |
| 374 | |
| 375 | if (glob(name, GLOB_ERR, NULL, &globbed) == 0) { |
| 376 | if (globbed.gl_pathc > 0) |
| 377 | ret = WCTYPE_WILDCARD; |
| 378 | globfree(&globbed); |
| 379 | } |
| 380 | |
| 381 | return ret; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Actually return matching file names for a local wildcard. |
| 387 | */ |
| 388 | struct WildcardMatcher { |
| 389 | glob_t globbed; |
| 390 | int i; |
| 391 | }; |
| 392 | WildcardMatcher *begin_wildcard_matching(char *name) { |
| 393 | WildcardMatcher *ret = snew(WildcardMatcher); |
| 394 | |
| 395 | if (glob(name, 0, NULL, &ret->globbed) < 0) { |
| 396 | sfree(ret); |
| 397 | return NULL; |
| 398 | } |
| 399 | |
| 400 | ret->i = 0; |
| 401 | |
| 402 | return ret; |
| 403 | } |
| 404 | char *wildcard_get_filename(WildcardMatcher *dir) { |
| 405 | if (dir->i < dir->globbed.gl_pathc) { |
| 406 | return dupstr(dir->globbed.gl_pathv[dir->i++]); |
| 407 | } else |
| 408 | return NULL; |
| 409 | } |
| 410 | void finish_wildcard_matching(WildcardMatcher *dir) { |
| 411 | globfree(&dir->globbed); |
| 412 | sfree(dir); |
| 413 | } |
| 414 | |
| 415 | int vet_filename(char *name) |
| 416 | { |
| 417 | if (strchr(name, '/')) |
| 418 | return FALSE; |
| 419 | |
| 420 | if (name[0] == '.' && (!name[1] || (name[1] == '.' && !name[2]))) |
| 421 | return FALSE; |
| 422 | |
| 423 | return TRUE; |
| 424 | } |
| 425 | |
| 426 | int create_directory(char *name) |
| 427 | { |
| 428 | return mkdir(name, 0777) == 0; |
| 429 | } |
| 430 | |
| 431 | char *dir_file_cat(char *dir, char *file) |
| 432 | { |
| 433 | return dupcat(dir, "/", file, NULL); |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Do a select() between all currently active network fds and |
| 438 | * optionally stdin. |
| 439 | */ |
| 440 | static int ssh_sftp_do_select(int include_stdin, int no_fds_ok) |
| 441 | { |
| 442 | fd_set rset, wset, xset; |
| 443 | int i, fdcount, fdsize, *fdlist; |
| 444 | int fd, fdstate, rwx, ret, maxfd; |
| 445 | long now = GETTICKCOUNT(); |
| 446 | |
| 447 | fdlist = NULL; |
| 448 | fdcount = fdsize = 0; |
| 449 | |
| 450 | do { |
| 451 | |
| 452 | /* Count the currently active fds. */ |
| 453 | i = 0; |
| 454 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
| 455 | fd = next_fd(&fdstate, &rwx)) i++; |
| 456 | |
| 457 | if (i < 1 && !no_fds_ok) |
| 458 | return -1; /* doom */ |
| 459 | |
| 460 | /* Expand the fdlist buffer if necessary. */ |
| 461 | if (i > fdsize) { |
| 462 | fdsize = i + 16; |
| 463 | fdlist = sresize(fdlist, fdsize, int); |
| 464 | } |
| 465 | |
| 466 | FD_ZERO(&rset); |
| 467 | FD_ZERO(&wset); |
| 468 | FD_ZERO(&xset); |
| 469 | maxfd = 0; |
| 470 | |
| 471 | /* |
| 472 | * Add all currently open fds to the select sets, and store |
| 473 | * them in fdlist as well. |
| 474 | */ |
| 475 | fdcount = 0; |
| 476 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
| 477 | fd = next_fd(&fdstate, &rwx)) { |
| 478 | fdlist[fdcount++] = fd; |
| 479 | if (rwx & 1) |
| 480 | FD_SET_MAX(fd, maxfd, rset); |
| 481 | if (rwx & 2) |
| 482 | FD_SET_MAX(fd, maxfd, wset); |
| 483 | if (rwx & 4) |
| 484 | FD_SET_MAX(fd, maxfd, xset); |
| 485 | } |
| 486 | |
| 487 | if (include_stdin) |
| 488 | FD_SET_MAX(0, maxfd, rset); |
| 489 | |
| 490 | do { |
| 491 | long next, ticks; |
| 492 | struct timeval tv, *ptv; |
| 493 | |
| 494 | if (run_timers(now, &next)) { |
| 495 | ticks = next - GETTICKCOUNT(); |
| 496 | if (ticks <= 0) |
| 497 | ticks = 1; /* just in case */ |
| 498 | tv.tv_sec = ticks / 1000; |
| 499 | tv.tv_usec = ticks % 1000 * 1000; |
| 500 | ptv = &tv; |
| 501 | } else { |
| 502 | ptv = NULL; |
| 503 | } |
| 504 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
| 505 | if (ret == 0) |
| 506 | now = next; |
| 507 | else { |
| 508 | long newnow = GETTICKCOUNT(); |
| 509 | /* |
| 510 | * Check to see whether the system clock has |
| 511 | * changed massively during the select. |
| 512 | */ |
| 513 | if (newnow - now < 0 || newnow - now > next - now) { |
| 514 | /* |
| 515 | * If so, look at the elapsed time in the |
| 516 | * select and use it to compute a new |
| 517 | * tickcount_offset. |
| 518 | */ |
| 519 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
| 520 | /* So we'd like GETTICKCOUNT to have returned othernow, |
| 521 | * but instead it return newnow. Hence ... */ |
| 522 | tickcount_offset += othernow - newnow; |
| 523 | now = othernow; |
| 524 | } else { |
| 525 | now = newnow; |
| 526 | } |
| 527 | } |
| 528 | } while (ret < 0 && errno != EINTR); |
| 529 | } while (ret == 0); |
| 530 | |
| 531 | if (ret < 0) { |
| 532 | perror("select"); |
| 533 | exit(1); |
| 534 | } |
| 535 | |
| 536 | for (i = 0; i < fdcount; i++) { |
| 537 | fd = fdlist[i]; |
| 538 | /* |
| 539 | * We must process exceptional notifications before |
| 540 | * ordinary readability ones, or we may go straight |
| 541 | * past the urgent marker. |
| 542 | */ |
| 543 | if (FD_ISSET(fd, &xset)) |
| 544 | select_result(fd, 4); |
| 545 | if (FD_ISSET(fd, &rset)) |
| 546 | select_result(fd, 1); |
| 547 | if (FD_ISSET(fd, &wset)) |
| 548 | select_result(fd, 2); |
| 549 | } |
| 550 | |
| 551 | sfree(fdlist); |
| 552 | |
| 553 | return FD_ISSET(0, &rset) ? 1 : 0; |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Wait for some network data and process it. |
| 558 | */ |
| 559 | int ssh_sftp_loop_iteration(void) |
| 560 | { |
| 561 | return ssh_sftp_do_select(FALSE, FALSE); |
| 562 | } |
| 563 | |
| 564 | /* |
| 565 | * Read a PSFTP command line from stdin. |
| 566 | */ |
| 567 | char *ssh_sftp_get_cmdline(char *prompt, int no_fds_ok) |
| 568 | { |
| 569 | char *buf; |
| 570 | int buflen, bufsize, ret; |
| 571 | |
| 572 | fputs(prompt, stdout); |
| 573 | fflush(stdout); |
| 574 | |
| 575 | buf = NULL; |
| 576 | buflen = bufsize = 0; |
| 577 | |
| 578 | while (1) { |
| 579 | ret = ssh_sftp_do_select(TRUE, no_fds_ok); |
| 580 | if (ret < 0) { |
| 581 | printf("connection died\n"); |
| 582 | return NULL; /* woop woop */ |
| 583 | } |
| 584 | if (ret > 0) { |
| 585 | if (buflen >= bufsize) { |
| 586 | bufsize = buflen + 512; |
| 587 | buf = sresize(buf, bufsize, char); |
| 588 | } |
| 589 | ret = read(0, buf+buflen, 1); |
| 590 | if (ret < 0) { |
| 591 | perror("read"); |
| 592 | return NULL; |
| 593 | } |
| 594 | if (ret == 0) { |
| 595 | /* eof on stdin; no error, but no answer either */ |
| 596 | return NULL; |
| 597 | } |
| 598 | |
| 599 | if (buf[buflen++] == '\n') { |
| 600 | /* we have a full line */ |
| 601 | return buf; |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * Main program: do platform-specific initialisation and then call |
| 609 | * psftp_main(). |
| 610 | */ |
| 611 | int main(int argc, char *argv[]) |
| 612 | { |
| 613 | uxsel_init(); |
| 614 | return psftp_main(argc, argv); |
| 615 | } |