1/* $OpenBSD: sftp-client.c,v 1.108 2013/11/08 00:39:15 djm Exp $ */ 2/* 3 * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* XXX: memleaks */ 19/* XXX: signed vs unsigned */ 20/* XXX: remove all logging, only return status codes */ 21/* XXX: copy between two remote sites */ 22 23#include "includes.h" 24 25#include <sys/types.h> 26#include <sys/param.h> 27#ifdef HAVE_SYS_STATVFS_H 28#include <sys/statvfs.h> 29#endif 30#include "openbsd-compat/sys-queue.h" 31#ifdef HAVE_SYS_STAT_H 32# include <sys/stat.h> 33#endif 34#ifdef HAVE_SYS_TIME_H 35# include <sys/time.h> 36#endif 37#include <sys/uio.h> 38 39#include <dirent.h> 40#include <errno.h> 41#include <fcntl.h> 42#include <signal.h> 43#include <stdarg.h> 44#include <stdio.h> 45#include <string.h> 46#include <unistd.h> 47 48#include "xmalloc.h" 49#include "buffer.h" 50#include "log.h" 51#include "atomicio.h" 52#include "progressmeter.h" 53#include "misc.h" 54 55#include "sftp.h" 56#include "sftp-common.h" 57#include "sftp-client.h" 58 59extern volatile sig_atomic_t interrupted; 60extern int showprogress; 61 62/* Minimum amount of data to read at a time */ 63#define MIN_READ_SIZE 512 64 65/* Maximum depth to descend in directory trees */ 66#define MAX_DIR_DEPTH 64 67 68struct sftp_conn { 69 int fd_in; 70 int fd_out; 71 u_int transfer_buflen; 72 u_int num_requests; 73 u_int version; 74 u_int msg_id; 75#define SFTP_EXT_POSIX_RENAME 0x00000001 76#define SFTP_EXT_STATVFS 0x00000002 77#define SFTP_EXT_FSTATVFS 0x00000004 78#define SFTP_EXT_HARDLINK 0x00000008 79 u_int exts; 80 u_int64_t limit_kbps; 81 struct bwlimit bwlimit_in, bwlimit_out; 82}; 83 84static char * 85get_handle(struct sftp_conn *conn, u_int expected_id, u_int *len, 86 const char *errfmt, ...) __attribute__((format(printf, 4, 5))); 87 88/* ARGSUSED */ 89static int 90sftpio(void *_bwlimit, size_t amount) 91{ 92 struct bwlimit *bwlimit = (struct bwlimit *)_bwlimit; 93 94 bandwidth_limit(bwlimit, amount); 95 return 0; 96} 97 98static void 99send_msg(struct sftp_conn *conn, Buffer *m) 100{ 101 u_char mlen[4]; 102 struct iovec iov[2]; 103 104 if (buffer_len(m) > SFTP_MAX_MSG_LENGTH) 105 fatal("Outbound message too long %u", buffer_len(m)); 106 107 /* Send length first */ 108 put_u32(mlen, buffer_len(m)); 109 iov[0].iov_base = mlen; 110 iov[0].iov_len = sizeof(mlen); 111 iov[1].iov_base = buffer_ptr(m); 112 iov[1].iov_len = buffer_len(m); 113 114 if (atomiciov6(writev, conn->fd_out, iov, 2, 115 conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_out) != 116 buffer_len(m) + sizeof(mlen)) 117 fatal("Couldn't send packet: %s", strerror(errno)); 118 119 buffer_clear(m); 120} 121 122static void 123get_msg(struct sftp_conn *conn, Buffer *m) 124{ 125 u_int msg_len; 126 127 buffer_append_space(m, 4); 128 if (atomicio6(read, conn->fd_in, buffer_ptr(m), 4, 129 conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_in) != 4) { 130 if (errno == EPIPE) 131 fatal("Connection closed"); 132 else 133 fatal("Couldn't read packet: %s", strerror(errno)); 134 } 135 136 msg_len = buffer_get_int(m); 137 if (msg_len > SFTP_MAX_MSG_LENGTH) 138 fatal("Received message too long %u", msg_len); 139 140 buffer_append_space(m, msg_len); 141 if (atomicio6(read, conn->fd_in, buffer_ptr(m), msg_len, 142 conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_in) 143 != msg_len) { 144 if (errno == EPIPE) 145 fatal("Connection closed"); 146 else 147 fatal("Read packet: %s", strerror(errno)); 148 } 149} 150 151static void 152send_string_request(struct sftp_conn *conn, u_int id, u_int code, char *s, 153 u_int len) 154{ 155 Buffer msg; 156 157 buffer_init(&msg); 158 buffer_put_char(&msg, code); 159 buffer_put_int(&msg, id); 160 buffer_put_string(&msg, s, len); 161 send_msg(conn, &msg); 162 debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id); 163 buffer_free(&msg); 164} 165 166static void 167send_string_attrs_request(struct sftp_conn *conn, u_int id, u_int code, 168 char *s, u_int len, Attrib *a) 169{ 170 Buffer msg; 171 172 buffer_init(&msg); 173 buffer_put_char(&msg, code); 174 buffer_put_int(&msg, id); 175 buffer_put_string(&msg, s, len); 176 encode_attrib(&msg, a); 177 send_msg(conn, &msg); 178 debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id); 179 buffer_free(&msg); 180} 181 182static u_int 183get_status(struct sftp_conn *conn, u_int expected_id) 184{ 185 Buffer msg; 186 u_int type, id, status; 187 188 buffer_init(&msg); 189 get_msg(conn, &msg); 190 type = buffer_get_char(&msg); 191 id = buffer_get_int(&msg); 192 193 if (id != expected_id) 194 fatal("ID mismatch (%u != %u)", id, expected_id); 195 if (type != SSH2_FXP_STATUS) 196 fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u", 197 SSH2_FXP_STATUS, type); 198 199 status = buffer_get_int(&msg); 200 buffer_free(&msg); 201 202 debug3("SSH2_FXP_STATUS %u", status); 203 204 return status; 205} 206 207static char * 208get_handle(struct sftp_conn *conn, u_int expected_id, u_int *len, 209 const char *errfmt, ...) 210{ 211 Buffer msg; 212 u_int type, id; 213 char *handle, errmsg[256]; 214 va_list args; 215 int status; 216 217 va_start(args, errfmt); 218 if (errfmt != NULL) 219 vsnprintf(errmsg, sizeof(errmsg), errfmt, args); 220 va_end(args); 221 222 buffer_init(&msg); 223 get_msg(conn, &msg); 224 type = buffer_get_char(&msg); 225 id = buffer_get_int(&msg); 226 227 if (id != expected_id) 228 fatal("%s: ID mismatch (%u != %u)", 229 errfmt == NULL ? __func__ : errmsg, id, expected_id); 230 if (type == SSH2_FXP_STATUS) { 231 status = buffer_get_int(&msg); 232 if (errfmt != NULL) 233 error("%s: %s", errmsg, fx2txt(status)); 234 buffer_free(&msg); 235 return(NULL); 236 } else if (type != SSH2_FXP_HANDLE) 237 fatal("%s: Expected SSH2_FXP_HANDLE(%u) packet, got %u", 238 errfmt == NULL ? __func__ : errmsg, SSH2_FXP_HANDLE, type); 239 240 handle = buffer_get_string(&msg, len); 241 buffer_free(&msg); 242 243 return(handle); 244} 245 246static Attrib * 247get_decode_stat(struct sftp_conn *conn, u_int expected_id, int quiet) 248{ 249 Buffer msg; 250 u_int type, id; 251 Attrib *a; 252 253 buffer_init(&msg); 254 get_msg(conn, &msg); 255 256 type = buffer_get_char(&msg); 257 id = buffer_get_int(&msg); 258 259 debug3("Received stat reply T:%u I:%u", type, id); 260 if (id != expected_id) 261 fatal("ID mismatch (%u != %u)", id, expected_id); 262 if (type == SSH2_FXP_STATUS) { 263 int status = buffer_get_int(&msg); 264 265 if (quiet) 266 debug("Couldn't stat remote file: %s", fx2txt(status)); 267 else 268 error("Couldn't stat remote file: %s", fx2txt(status)); 269 buffer_free(&msg); 270 return(NULL); 271 } else if (type != SSH2_FXP_ATTRS) { 272 fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u", 273 SSH2_FXP_ATTRS, type); 274 } 275 a = decode_attrib(&msg); 276 buffer_free(&msg); 277 278 return(a); 279} 280 281static int 282get_decode_statvfs(struct sftp_conn *conn, struct sftp_statvfs *st, 283 u_int expected_id, int quiet) 284{ 285 Buffer msg; 286 u_int type, id, flag; 287 288 buffer_init(&msg); 289 get_msg(conn, &msg); 290 291 type = buffer_get_char(&msg); 292 id = buffer_get_int(&msg); 293 294 debug3("Received statvfs reply T:%u I:%u", type, id); 295 if (id != expected_id) 296 fatal("ID mismatch (%u != %u)", id, expected_id); 297 if (type == SSH2_FXP_STATUS) { 298 int status = buffer_get_int(&msg); 299 300 if (quiet) 301 debug("Couldn't statvfs: %s", fx2txt(status)); 302 else 303 error("Couldn't statvfs: %s", fx2txt(status)); 304 buffer_free(&msg); 305 return -1; 306 } else if (type != SSH2_FXP_EXTENDED_REPLY) { 307 fatal("Expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u", 308 SSH2_FXP_EXTENDED_REPLY, type); 309 } 310 311 bzero(st, sizeof(*st)); 312 st->f_bsize = buffer_get_int64(&msg); 313 st->f_frsize = buffer_get_int64(&msg); 314 st->f_blocks = buffer_get_int64(&msg); 315 st->f_bfree = buffer_get_int64(&msg); 316 st->f_bavail = buffer_get_int64(&msg); 317 st->f_files = buffer_get_int64(&msg); 318 st->f_ffree = buffer_get_int64(&msg); 319 st->f_favail = buffer_get_int64(&msg); 320 st->f_fsid = buffer_get_int64(&msg); 321 flag = buffer_get_int64(&msg); 322 st->f_namemax = buffer_get_int64(&msg); 323 324 st->f_flag = (flag & SSH2_FXE_STATVFS_ST_RDONLY) ? ST_RDONLY : 0; 325 st->f_flag |= (flag & SSH2_FXE_STATVFS_ST_NOSUID) ? ST_NOSUID : 0; 326 327 buffer_free(&msg); 328 329 return 0; 330} 331 332struct sftp_conn * 333do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests, 334 u_int64_t limit_kbps) 335{ 336 u_int type; 337 Buffer msg; 338 struct sftp_conn *ret; 339 340 ret = xmalloc(sizeof(*ret)); 341 ret->fd_in = fd_in; 342 ret->fd_out = fd_out; 343 ret->transfer_buflen = transfer_buflen; 344 ret->num_requests = num_requests; 345 ret->exts = 0; 346 ret->limit_kbps = 0; 347 348 buffer_init(&msg); 349 buffer_put_char(&msg, SSH2_FXP_INIT); 350 buffer_put_int(&msg, SSH2_FILEXFER_VERSION); 351 send_msg(ret, &msg); 352 353 buffer_clear(&msg); 354 355 get_msg(ret, &msg); 356 357 /* Expecting a VERSION reply */ 358 if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { 359 error("Invalid packet back from SSH2_FXP_INIT (type %u)", 360 type); 361 buffer_free(&msg); 362 return(NULL); 363 } 364 ret->version = buffer_get_int(&msg); 365 366 debug2("Remote version: %u", ret->version); 367 368 /* Check for extensions */ 369 while (buffer_len(&msg) > 0) { 370 char *name = buffer_get_string(&msg, NULL); 371 char *value = buffer_get_string(&msg, NULL); 372 int known = 0; 373 374 if (strcmp(name, "posix-rename@openssh.com") == 0 && 375 strcmp(value, "1") == 0) { 376 ret->exts |= SFTP_EXT_POSIX_RENAME; 377 known = 1; 378 } else if (strcmp(name, "statvfs@openssh.com") == 0 && 379 strcmp(value, "2") == 0) { 380 ret->exts |= SFTP_EXT_STATVFS; 381 known = 1; 382 } else if (strcmp(name, "fstatvfs@openssh.com") == 0 && 383 strcmp(value, "2") == 0) { 384 ret->exts |= SFTP_EXT_FSTATVFS; 385 known = 1; 386 } else if (strcmp(name, "hardlink@openssh.com") == 0 && 387 strcmp(value, "1") == 0) { 388 ret->exts |= SFTP_EXT_HARDLINK; 389 known = 1; 390 } 391 if (known) { 392 debug2("Server supports extension \"%s\" revision %s", 393 name, value); 394 } else { 395 debug2("Unrecognised server extension \"%s\"", name); 396 } 397 free(name); 398 free(value); 399 } 400 401 buffer_free(&msg); 402 403 /* Some filexfer v.0 servers don't support large packets */ 404 if (ret->version == 0) 405 ret->transfer_buflen = MIN(ret->transfer_buflen, 20480); 406 407 ret->limit_kbps = limit_kbps; 408 if (ret->limit_kbps > 0) { 409 bandwidth_limit_init(&ret->bwlimit_in, ret->limit_kbps, 410 ret->transfer_buflen); 411 bandwidth_limit_init(&ret->bwlimit_out, ret->limit_kbps, 412 ret->transfer_buflen); 413 } 414 415 return ret; 416} 417 418u_int 419sftp_proto_version(struct sftp_conn *conn) 420{ 421 return conn->version; 422} 423 424int 425do_close(struct sftp_conn *conn, char *handle, u_int handle_len) 426{ 427 u_int id, status; 428 Buffer msg; 429 430 buffer_init(&msg); 431 432 id = conn->msg_id++; 433 buffer_put_char(&msg, SSH2_FXP_CLOSE); 434 buffer_put_int(&msg, id); 435 buffer_put_string(&msg, handle, handle_len); 436 send_msg(conn, &msg); 437 debug3("Sent message SSH2_FXP_CLOSE I:%u", id); 438 439 status = get_status(conn, id); 440 if (status != SSH2_FX_OK) 441 error("Couldn't close file: %s", fx2txt(status)); 442 443 buffer_free(&msg); 444 445 return status; 446} 447 448 449static int 450do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, 451 SFTP_DIRENT ***dir) 452{ 453 Buffer msg; 454 u_int count, type, id, handle_len, i, expected_id, ents = 0; 455 char *handle; 456 457 id = conn->msg_id++; 458 459 buffer_init(&msg); 460 buffer_put_char(&msg, SSH2_FXP_OPENDIR); 461 buffer_put_int(&msg, id); 462 buffer_put_cstring(&msg, path); 463 send_msg(conn, &msg); 464 465 handle = get_handle(conn, id, &handle_len, 466 "remote readdir(\"%s\")", path); 467 if (handle == NULL) { 468 buffer_free(&msg); 469 return -1; 470 } 471 472 if (dir) { 473 ents = 0; 474 *dir = xcalloc(1, sizeof(**dir)); 475 (*dir)[0] = NULL; 476 } 477 478 for (; !interrupted;) { 479 id = expected_id = conn->msg_id++; 480 481 debug3("Sending SSH2_FXP_READDIR I:%u", id); 482 483 buffer_clear(&msg); 484 buffer_put_char(&msg, SSH2_FXP_READDIR); 485 buffer_put_int(&msg, id); 486 buffer_put_string(&msg, handle, handle_len); 487 send_msg(conn, &msg); 488 489 buffer_clear(&msg); 490 491 get_msg(conn, &msg); 492 493 type = buffer_get_char(&msg); 494 id = buffer_get_int(&msg); 495 496 debug3("Received reply T:%u I:%u", type, id); 497 498 if (id != expected_id) 499 fatal("ID mismatch (%u != %u)", id, expected_id); 500 501 if (type == SSH2_FXP_STATUS) { 502 int status = buffer_get_int(&msg); 503 504 debug3("Received SSH2_FXP_STATUS %d", status); 505 506 if (status == SSH2_FX_EOF) { 507 break; 508 } else { 509 error("Couldn't read directory: %s", 510 fx2txt(status)); 511 do_close(conn, handle, handle_len); 512 free(handle); 513 buffer_free(&msg); 514 return(status); 515 } 516 } else if (type != SSH2_FXP_NAME) 517 fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", 518 SSH2_FXP_NAME, type); 519 520 count = buffer_get_int(&msg); 521 if (count == 0) 522 break; 523 debug3("Received %d SSH2_FXP_NAME responses", count); 524 for (i = 0; i < count; i++) { 525 char *filename, *longname; 526 Attrib *a; 527 528 filename = buffer_get_string(&msg, NULL); 529 longname = buffer_get_string(&msg, NULL); 530 a = decode_attrib(&msg); 531 532 if (printflag) 533 printf("%s\n", longname); 534 535 /* 536 * Directory entries should never contain '/' 537 * These can be used to attack recursive ops 538 * (e.g. send '../../../../etc/passwd') 539 */ 540 if (strchr(filename, '/') != NULL) { 541 error("Server sent suspect path \"%s\" " 542 "during readdir of \"%s\"", filename, path); 543 goto next; 544 } 545 546 if (dir) { 547 *dir = xrealloc(*dir, ents + 2, sizeof(**dir)); 548 (*dir)[ents] = xcalloc(1, sizeof(***dir)); 549 (*dir)[ents]->filename = xstrdup(filename); 550 (*dir)[ents]->longname = xstrdup(longname); 551 memcpy(&(*dir)[ents]->a, a, sizeof(*a)); 552 (*dir)[++ents] = NULL; 553 } 554 next: 555 free(filename); 556 free(longname); 557 } 558 } 559 560 buffer_free(&msg); 561 do_close(conn, handle, handle_len); 562 free(handle); 563 564 /* Don't return partial matches on interrupt */ 565 if (interrupted && dir != NULL && *dir != NULL) { 566 free_sftp_dirents(*dir); 567 *dir = xcalloc(1, sizeof(**dir)); 568 **dir = NULL; 569 } 570 571 return 0; 572} 573 574int 575do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir) 576{ 577 return(do_lsreaddir(conn, path, 0, dir)); 578} 579 580void free_sftp_dirents(SFTP_DIRENT **s) 581{ 582 int i; 583 584 for (i = 0; s[i]; i++) { 585 free(s[i]->filename); 586 free(s[i]->longname); 587 free(s[i]); 588 } 589 free(s); 590} 591 592int 593do_rm(struct sftp_conn *conn, char *path) 594{ 595 u_int status, id; 596 597 debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); 598 599 id = conn->msg_id++; 600 send_string_request(conn, id, SSH2_FXP_REMOVE, path, strlen(path)); 601 status = get_status(conn, id); 602 if (status != SSH2_FX_OK) 603 error("Couldn't delete file: %s", fx2txt(status)); 604 return(status); 605} 606 607int 608do_mkdir(struct sftp_conn *conn, char *path, Attrib *a, int printflag) 609{ 610 u_int status, id; 611 612 id = conn->msg_id++; 613 send_string_attrs_request(conn, id, SSH2_FXP_MKDIR, path, 614 strlen(path), a); 615 616 status = get_status(conn, id); 617 if (status != SSH2_FX_OK && printflag) 618 error("Couldn't create directory: %s", fx2txt(status)); 619 620 return(status); 621} 622 623int 624do_rmdir(struct sftp_conn *conn, char *path) 625{ 626 u_int status, id; 627 628 id = conn->msg_id++; 629 send_string_request(conn, id, SSH2_FXP_RMDIR, path, 630 strlen(path)); 631 632 status = get_status(conn, id); 633 if (status != SSH2_FX_OK) 634 error("Couldn't remove directory: %s", fx2txt(status)); 635 636 return(status); 637} 638 639Attrib * 640do_stat(struct sftp_conn *conn, char *path, int quiet) 641{ 642 u_int id; 643 644 id = conn->msg_id++; 645 646 send_string_request(conn, id, 647 conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT, 648 path, strlen(path)); 649 650 return(get_decode_stat(conn, id, quiet)); 651} 652 653Attrib * 654do_lstat(struct sftp_conn *conn, char *path, int quiet) 655{ 656 u_int id; 657 658 if (conn->version == 0) { 659 if (quiet) 660 debug("Server version does not support lstat operation"); 661 else 662 logit("Server version does not support lstat operation"); 663 return(do_stat(conn, path, quiet)); 664 } 665 666 id = conn->msg_id++; 667 send_string_request(conn, id, SSH2_FXP_LSTAT, path, 668 strlen(path)); 669 670 return(get_decode_stat(conn, id, quiet)); 671} 672 673#ifdef notyet 674Attrib * 675do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) 676{ 677 u_int id; 678 679 id = conn->msg_id++; 680 send_string_request(conn, id, SSH2_FXP_FSTAT, handle, 681 handle_len); 682 683 return(get_decode_stat(conn, id, quiet)); 684} 685#endif 686 687int 688do_setstat(struct sftp_conn *conn, char *path, Attrib *a) 689{ 690 u_int status, id; 691 692 id = conn->msg_id++; 693 send_string_attrs_request(conn, id, SSH2_FXP_SETSTAT, path, 694 strlen(path), a); 695 696 status = get_status(conn, id); 697 if (status != SSH2_FX_OK) 698 error("Couldn't setstat on \"%s\": %s", path, 699 fx2txt(status)); 700 701 return(status); 702} 703 704int 705do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, 706 Attrib *a) 707{ 708 u_int status, id; 709 710 id = conn->msg_id++; 711 send_string_attrs_request(conn, id, SSH2_FXP_FSETSTAT, handle, 712 handle_len, a); 713 714 status = get_status(conn, id); 715 if (status != SSH2_FX_OK) 716 error("Couldn't fsetstat: %s", fx2txt(status)); 717 718 return(status); 719} 720 721char * 722do_realpath(struct sftp_conn *conn, char *path) 723{ 724 Buffer msg; 725 u_int type, expected_id, count, id; 726 char *filename, *longname; 727 Attrib *a; 728 729 expected_id = id = conn->msg_id++; 730 send_string_request(conn, id, SSH2_FXP_REALPATH, path, 731 strlen(path)); 732 733 buffer_init(&msg); 734 735 get_msg(conn, &msg); 736 type = buffer_get_char(&msg); 737 id = buffer_get_int(&msg); 738 739 if (id != expected_id) 740 fatal("ID mismatch (%u != %u)", id, expected_id); 741 742 if (type == SSH2_FXP_STATUS) { 743 u_int status = buffer_get_int(&msg); 744 745 error("Couldn't canonicalise: %s", fx2txt(status)); 746 buffer_free(&msg); 747 return NULL; 748 } else if (type != SSH2_FXP_NAME) 749 fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", 750 SSH2_FXP_NAME, type); 751 752 count = buffer_get_int(&msg); 753 if (count != 1) 754 fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); 755 756 filename = buffer_get_string(&msg, NULL); 757 longname = buffer_get_string(&msg, NULL); 758 a = decode_attrib(&msg); 759 760 debug3("SSH_FXP_REALPATH %s -> %s size %lu", path, filename, 761 (unsigned long)a->size); 762 763 free(longname); 764 765 buffer_free(&msg); 766 767 return(filename); 768} 769 770int 771do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) 772{ 773 Buffer msg; 774 u_int status, id; 775 776 buffer_init(&msg); 777 778 /* Send rename request */ 779 id = conn->msg_id++; 780 if ((conn->exts & SFTP_EXT_POSIX_RENAME)) { 781 buffer_put_char(&msg, SSH2_FXP_EXTENDED); 782 buffer_put_int(&msg, id); 783 buffer_put_cstring(&msg, "posix-rename@openssh.com"); 784 } else { 785 buffer_put_char(&msg, SSH2_FXP_RENAME); 786 buffer_put_int(&msg, id); 787 } 788 buffer_put_cstring(&msg, oldpath); 789 buffer_put_cstring(&msg, newpath); 790 send_msg(conn, &msg); 791 debug3("Sent message %s \"%s\" -> \"%s\"", 792 (conn->exts & SFTP_EXT_POSIX_RENAME) ? "posix-rename@openssh.com" : 793 "SSH2_FXP_RENAME", oldpath, newpath); 794 buffer_free(&msg); 795 796 status = get_status(conn, id); 797 if (status != SSH2_FX_OK) 798 error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, 799 newpath, fx2txt(status)); 800 801 return(status); 802} 803 804int 805do_hardlink(struct sftp_conn *conn, char *oldpath, char *newpath) 806{ 807 Buffer msg; 808 u_int status, id; 809 810 if ((conn->exts & SFTP_EXT_HARDLINK) == 0) { 811 error("Server does not support hardlink@openssh.com extension"); 812 return -1; 813 } 814 815 buffer_init(&msg); 816 817 /* Send link request */ 818 id = conn->msg_id++; 819 buffer_put_char(&msg, SSH2_FXP_EXTENDED); 820 buffer_put_int(&msg, id); 821 buffer_put_cstring(&msg, "hardlink@openssh.com"); 822 buffer_put_cstring(&msg, oldpath); 823 buffer_put_cstring(&msg, newpath); 824 send_msg(conn, &msg); 825 debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"", 826 oldpath, newpath); 827 buffer_free(&msg); 828 829 status = get_status(conn, id); 830 if (status != SSH2_FX_OK) 831 error("Couldn't link file \"%s\" to \"%s\": %s", oldpath, 832 newpath, fx2txt(status)); 833 834 return(status); 835} 836 837int 838do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) 839{ 840 Buffer msg; 841 u_int status, id; 842 843 if (conn->version < 3) { 844 error("This server does not support the symlink operation"); 845 return(SSH2_FX_OP_UNSUPPORTED); 846 } 847 848 buffer_init(&msg); 849 850 /* Send symlink request */ 851 id = conn->msg_id++; 852 buffer_put_char(&msg, SSH2_FXP_SYMLINK); 853 buffer_put_int(&msg, id); 854 buffer_put_cstring(&msg, oldpath); 855 buffer_put_cstring(&msg, newpath); 856 send_msg(conn, &msg); 857 debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, 858 newpath); 859 buffer_free(&msg); 860 861 status = get_status(conn, id); 862 if (status != SSH2_FX_OK) 863 error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath, 864 newpath, fx2txt(status)); 865 866 return(status); 867} 868 869#ifdef notyet 870char * 871do_readlink(struct sftp_conn *conn, char *path) 872{ 873 Buffer msg; 874 u_int type, expected_id, count, id; 875 char *filename, *longname; 876 Attrib *a; 877 878 expected_id = id = conn->msg_id++; 879 send_string_request(conn, id, SSH2_FXP_READLINK, path, strlen(path)); 880 881 buffer_init(&msg); 882 883 get_msg(conn, &msg); 884 type = buffer_get_char(&msg); 885 id = buffer_get_int(&msg); 886 887 if (id != expected_id) 888 fatal("ID mismatch (%u != %u)", id, expected_id); 889 890 if (type == SSH2_FXP_STATUS) { 891 u_int status = buffer_get_int(&msg); 892 893 error("Couldn't readlink: %s", fx2txt(status)); 894 buffer_free(&msg); 895 return(NULL); 896 } else if (type != SSH2_FXP_NAME) 897 fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", 898 SSH2_FXP_NAME, type); 899 900 count = buffer_get_int(&msg); 901 if (count != 1) 902 fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); 903 904 filename = buffer_get_string(&msg, NULL); 905 longname = buffer_get_string(&msg, NULL); 906 a = decode_attrib(&msg); 907 908 debug3("SSH_FXP_READLINK %s -> %s", path, filename); 909 910 free(longname); 911 912 buffer_free(&msg); 913 914 return(filename); 915} 916#endif 917 918int 919do_statvfs(struct sftp_conn *conn, const char *path, struct sftp_statvfs *st, 920 int quiet) 921{ 922 Buffer msg; 923 u_int id; 924 925 if ((conn->exts & SFTP_EXT_STATVFS) == 0) { 926 error("Server does not support statvfs@openssh.com extension"); 927 return -1; 928 } 929 930 id = conn->msg_id++; 931 932 buffer_init(&msg); 933 buffer_clear(&msg); 934 buffer_put_char(&msg, SSH2_FXP_EXTENDED); 935 buffer_put_int(&msg, id); 936 buffer_put_cstring(&msg, "statvfs@openssh.com"); 937 buffer_put_cstring(&msg, path); 938 send_msg(conn, &msg); 939 buffer_free(&msg); 940 941 return get_decode_statvfs(conn, st, id, quiet); 942} 943 944#ifdef notyet 945int 946do_fstatvfs(struct sftp_conn *conn, const char *handle, u_int handle_len, 947 struct sftp_statvfs *st, int quiet) 948{ 949 Buffer msg; 950 u_int id; 951 952 if ((conn->exts & SFTP_EXT_FSTATVFS) == 0) { 953 error("Server does not support fstatvfs@openssh.com extension"); 954 return -1; 955 } 956 957 id = conn->msg_id++; 958 959 buffer_init(&msg); 960 buffer_clear(&msg); 961 buffer_put_char(&msg, SSH2_FXP_EXTENDED); 962 buffer_put_int(&msg, id); 963 buffer_put_cstring(&msg, "fstatvfs@openssh.com"); 964 buffer_put_string(&msg, handle, handle_len); 965 send_msg(conn, &msg); 966 buffer_free(&msg); 967 968 return get_decode_statvfs(conn, st, id, quiet); 969} 970#endif 971 972static void 973send_read_request(struct sftp_conn *conn, u_int id, u_int64_t offset, 974 u_int len, char *handle, u_int handle_len) 975{ 976 Buffer msg; 977 978 buffer_init(&msg); 979 buffer_clear(&msg); 980 buffer_put_char(&msg, SSH2_FXP_READ); 981 buffer_put_int(&msg, id); 982 buffer_put_string(&msg, handle, handle_len); 983 buffer_put_int64(&msg, offset); 984 buffer_put_int(&msg, len); 985 send_msg(conn, &msg); 986 buffer_free(&msg); 987} 988 989int 990do_download(struct sftp_conn *conn, char *remote_path, char *local_path, 991 Attrib *a, int pflag, int resume) 992{ 993 Attrib junk; 994 Buffer msg; 995 char *handle; 996 int local_fd = -1, status = 0, write_error; 997 int read_error, write_errno, reordered = 0; 998 u_int64_t offset = 0, size, highwater; 999 u_int handle_len, mode, type, id, buflen, num_req, max_req; 1000 off_t progress_counter; 1001 struct stat st; 1002 struct request { 1003 u_int id; 1004 u_int len; 1005 u_int64_t offset; 1006 TAILQ_ENTRY(request) tq; 1007 }; 1008 TAILQ_HEAD(reqhead, request) requests; 1009 struct request *req; 1010 1011 TAILQ_INIT(&requests); 1012 1013 if (a == NULL && (a = do_stat(conn, remote_path, 0)) == NULL) 1014 return -1; 1015 1016 /* Do not preserve set[ug]id here, as we do not preserve ownership */ 1017 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 1018 mode = a->perm & 0777; 1019 else 1020 mode = 0666; 1021 1022 if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && 1023 (!S_ISREG(a->perm))) { 1024 error("Cannot download non-regular file: %s", remote_path); 1025 return(-1); 1026 } 1027 1028 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 1029 size = a->size; 1030 else 1031 size = 0; 1032 1033 buflen = conn->transfer_buflen; 1034 buffer_init(&msg); 1035 1036 /* Send open request */ 1037 id = conn->msg_id++; 1038 buffer_put_char(&msg, SSH2_FXP_OPEN); 1039 buffer_put_int(&msg, id); 1040 buffer_put_cstring(&msg, remote_path); 1041 buffer_put_int(&msg, SSH2_FXF_READ); 1042 attrib_clear(&junk); /* Send empty attributes */ 1043 encode_attrib(&msg, &junk); 1044 send_msg(conn, &msg); 1045 debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); 1046 1047 handle = get_handle(conn, id, &handle_len, 1048 "remote open(\"%s\")", remote_path); 1049 if (handle == NULL) { 1050 buffer_free(&msg); 1051 return(-1); 1052 } 1053 1054 local_fd = open(local_path, O_WRONLY | O_CREAT | (resume ? 0 : O_TRUNC), 1055 mode | S_IWUSR); 1056 if (local_fd == -1) { 1057 error("Couldn't open local file \"%s\" for writing: %s", 1058 local_path, strerror(errno)); 1059 goto fail; 1060 } 1061 offset = highwater = 0; 1062 if (resume) { 1063 if (fstat(local_fd, &st) == -1) { 1064 error("Unable to stat local file \"%s\": %s", 1065 local_path, strerror(errno)); 1066 goto fail; 1067 } 1068 if ((size_t)st.st_size > size) { 1069 error("Unable to resume download of \"%s\": " 1070 "local file is larger than remote", local_path); 1071 fail: 1072 do_close(conn, handle, handle_len); 1073 buffer_free(&msg); 1074 free(handle); 1075 return -1; 1076 } 1077 offset = highwater = st.st_size; 1078 } 1079 1080 /* Read from remote and write to local */ 1081 write_error = read_error = write_errno = num_req = 0; 1082 max_req = 1; 1083 progress_counter = offset; 1084 1085 if (showprogress && size != 0) 1086 start_progress_meter(remote_path, size, &progress_counter); 1087 1088 while (num_req > 0 || max_req > 0) { 1089 char *data; 1090 u_int len; 1091 1092 /* 1093 * Simulate EOF on interrupt: stop sending new requests and 1094 * allow outstanding requests to drain gracefully 1095 */ 1096 if (interrupted) { 1097 if (num_req == 0) /* If we haven't started yet... */ 1098 break; 1099 max_req = 0; 1100 } 1101 1102 /* Send some more requests */ 1103 while (num_req < max_req) { 1104 debug3("Request range %llu -> %llu (%d/%d)", 1105 (unsigned long long)offset, 1106 (unsigned long long)offset + buflen - 1, 1107 num_req, max_req); 1108 req = xcalloc(1, sizeof(*req)); 1109 req->id = conn->msg_id++; 1110 req->len = buflen; 1111 req->offset = offset; 1112 offset += buflen; 1113 num_req++; 1114 TAILQ_INSERT_TAIL(&requests, req, tq); 1115 send_read_request(conn, req->id, req->offset, 1116 req->len, handle, handle_len); 1117 } 1118 1119 buffer_clear(&msg); 1120 get_msg(conn, &msg); 1121 type = buffer_get_char(&msg); 1122 id = buffer_get_int(&msg); 1123 debug3("Received reply T:%u I:%u R:%d", type, id, max_req); 1124 1125 /* Find the request in our queue */ 1126 for (req = TAILQ_FIRST(&requests); 1127 req != NULL && req->id != id; 1128 req = TAILQ_NEXT(req, tq)) 1129 ; 1130 if (req == NULL) 1131 fatal("Unexpected reply %u", id); 1132 1133 switch (type) { 1134 case SSH2_FXP_STATUS: 1135 status = buffer_get_int(&msg); 1136 if (status != SSH2_FX_EOF) 1137 read_error = 1; 1138 max_req = 0; 1139 TAILQ_REMOVE(&requests, req, tq); 1140 free(req); 1141 num_req--; 1142 break; 1143 case SSH2_FXP_DATA: 1144 data = buffer_get_string(&msg, &len); 1145 debug3("Received data %llu -> %llu", 1146 (unsigned long long)req->offset, 1147 (unsigned long long)req->offset + len - 1); 1148 if (len > req->len) 1149 fatal("Received more data than asked for " 1150 "%u > %u", len, req->len); 1151 if ((lseek(local_fd, req->offset, SEEK_SET) == -1 || 1152 atomicio(vwrite, local_fd, data, len) != len) && 1153 !write_error) { 1154 write_errno = errno; 1155 write_error = 1; 1156 max_req = 0; 1157 } 1158 else if (!reordered && req->offset <= highwater) 1159 highwater = req->offset + len; 1160 else if (!reordered && req->offset > highwater) 1161 reordered = 1; 1162 progress_counter += len; 1163 free(data); 1164 1165 if (len == req->len) { 1166 TAILQ_REMOVE(&requests, req, tq); 1167 free(req); 1168 num_req--; 1169 } else { 1170 /* Resend the request for the missing data */ 1171 debug3("Short data block, re-requesting " 1172 "%llu -> %llu (%2d)", 1173 (unsigned long long)req->offset + len, 1174 (unsigned long long)req->offset + 1175 req->len - 1, num_req); 1176 req->id = conn->msg_id++; 1177 req->len -= len; 1178 req->offset += len; 1179 send_read_request(conn, req->id, 1180 req->offset, req->len, handle, handle_len); 1181 /* Reduce the request size */ 1182 if (len < buflen) 1183 buflen = MAX(MIN_READ_SIZE, len); 1184 } 1185 if (max_req > 0) { /* max_req = 0 iff EOF received */ 1186 if (size > 0 && offset > size) { 1187 /* Only one request at a time 1188 * after the expected EOF */ 1189 debug3("Finish at %llu (%2d)", 1190 (unsigned long long)offset, 1191 num_req); 1192 max_req = 1; 1193 } else if (max_req <= conn->num_requests) { 1194 ++max_req; 1195 } 1196 } 1197 break; 1198 default: 1199 fatal("Expected SSH2_FXP_DATA(%u) packet, got %u", 1200 SSH2_FXP_DATA, type); 1201 } 1202 } 1203 1204 if (showprogress && size) 1205 stop_progress_meter(); 1206 1207 /* Sanity check */ 1208 if (TAILQ_FIRST(&requests) != NULL) 1209 fatal("Transfer complete, but requests still in queue"); 1210 /* Truncate at highest contiguous point to avoid holes on interrupt */ 1211 if (read_error || write_error || interrupted) { 1212 if (reordered && resume) { 1213 error("Unable to resume download of \"%s\": " 1214 "server reordered requests", local_path); 1215 } 1216 debug("truncating at %llu", (unsigned long long)highwater); 1217 ftruncate(local_fd, highwater); 1218 } 1219 if (read_error) { 1220 error("Couldn't read from remote file \"%s\" : %s", 1221 remote_path, fx2txt(status)); 1222 do_close(conn, handle, handle_len); 1223 } else if (write_error) { 1224 error("Couldn't write to \"%s\": %s", local_path, 1225 strerror(write_errno)); 1226 status = -1; 1227 do_close(conn, handle, handle_len); 1228 } else { 1229 status = do_close(conn, handle, handle_len); 1230 if (interrupted) 1231 status = -1; 1232 /* Override umask and utimes if asked */ 1233#ifdef HAVE_FCHMOD 1234 if (pflag && fchmod(local_fd, mode) == -1) 1235#else 1236 if (pflag && chmod(local_path, mode) == -1) 1237#endif /* HAVE_FCHMOD */ 1238 error("Couldn't set mode on \"%s\": %s", local_path, 1239 strerror(errno)); 1240 if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { 1241 struct timeval tv[2]; 1242 tv[0].tv_sec = a->atime; 1243 tv[1].tv_sec = a->mtime; 1244 tv[0].tv_usec = tv[1].tv_usec = 0; 1245 if (utimes(local_path, tv) == -1) 1246 error("Can't set times on \"%s\": %s", 1247 local_path, strerror(errno)); 1248 } 1249 } 1250 close(local_fd); 1251 buffer_free(&msg); 1252 free(handle); 1253 1254 return(status); 1255} 1256 1257static int 1258download_dir_internal(struct sftp_conn *conn, char *src, char *dst, 1259 Attrib *dirattrib, int pflag, int printflag, int depth, int resume) 1260{ 1261 int i, ret = 0; 1262 SFTP_DIRENT **dir_entries; 1263 char *filename, *new_src, *new_dst; 1264 mode_t mode = 0777; 1265 1266 if (depth >= MAX_DIR_DEPTH) { 1267 error("Maximum directory depth exceeded: %d levels", depth); 1268 return -1; 1269 } 1270 1271 if (dirattrib == NULL && 1272 (dirattrib = do_stat(conn, src, 1)) == NULL) { 1273 error("Unable to stat remote directory \"%s\"", src); 1274 return -1; 1275 } 1276 if (!S_ISDIR(dirattrib->perm)) { 1277 error("\"%s\" is not a directory", src); 1278 return -1; 1279 } 1280 if (printflag) 1281 printf("Retrieving %s\n", src); 1282 1283 if (dirattrib->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 1284 mode = dirattrib->perm & 01777; 1285 else { 1286 debug("Server did not send permissions for " 1287 "directory \"%s\"", dst); 1288 } 1289 1290 if (mkdir(dst, mode) == -1 && errno != EEXIST) { 1291 error("mkdir %s: %s", dst, strerror(errno)); 1292 return -1; 1293 } 1294 1295 if (do_readdir(conn, src, &dir_entries) == -1) { 1296 error("%s: Failed to get directory contents", src); 1297 return -1; 1298 } 1299 1300 for (i = 0; dir_entries[i] != NULL && !interrupted; i++) { 1301 filename = dir_entries[i]->filename; 1302 1303 new_dst = path_append(dst, filename); 1304 new_src = path_append(src, filename); 1305 1306 if (S_ISDIR(dir_entries[i]->a.perm)) { 1307 if (strcmp(filename, ".") == 0 || 1308 strcmp(filename, "..") == 0) 1309 continue; 1310 if (download_dir_internal(conn, new_src, new_dst, 1311 &(dir_entries[i]->a), pflag, printflag, 1312 depth + 1, resume) == -1) 1313 ret = -1; 1314 } else if (S_ISREG(dir_entries[i]->a.perm) ) { 1315 if (do_download(conn, new_src, new_dst, 1316 &(dir_entries[i]->a), pflag, resume) == -1) { 1317 error("Download of file %s to %s failed", 1318 new_src, new_dst); 1319 ret = -1; 1320 } 1321 } else 1322 logit("%s: not a regular file\n", new_src); 1323 1324 free(new_dst); 1325 free(new_src); 1326 } 1327 1328 if (pflag) { 1329 if (dirattrib->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 1330 struct timeval tv[2]; 1331 tv[0].tv_sec = dirattrib->atime; 1332 tv[1].tv_sec = dirattrib->mtime; 1333 tv[0].tv_usec = tv[1].tv_usec = 0; 1334 if (utimes(dst, tv) == -1) 1335 error("Can't set times on \"%s\": %s", 1336 dst, strerror(errno)); 1337 } else 1338 debug("Server did not send times for directory " 1339 "\"%s\"", dst); 1340 } 1341 1342 free_sftp_dirents(dir_entries); 1343 1344 return ret; 1345} 1346 1347int 1348download_dir(struct sftp_conn *conn, char *src, char *dst, 1349 Attrib *dirattrib, int pflag, int printflag, int resume) 1350{ 1351 char *src_canon; 1352 int ret; 1353 1354 if ((src_canon = do_realpath(conn, src)) == NULL) { 1355 error("Unable to canonicalise path \"%s\"", src); 1356 return -1; 1357 } 1358 1359 ret = download_dir_internal(conn, src_canon, dst, 1360 dirattrib, pflag, printflag, 0, resume); 1361 free(src_canon); 1362 return ret; 1363} 1364 1365int 1366do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, 1367 int pflag) 1368{ 1369 int local_fd; 1370 int status = SSH2_FX_OK; 1371 u_int handle_len, id, type; 1372 off_t offset, progress_counter; 1373 char *handle, *data; 1374 Buffer msg; 1375 struct stat sb; 1376 Attrib a; 1377 u_int32_t startid; 1378 u_int32_t ackid; 1379 struct outstanding_ack { 1380 u_int id; 1381 u_int len; 1382 off_t offset; 1383 TAILQ_ENTRY(outstanding_ack) tq; 1384 }; 1385 TAILQ_HEAD(ackhead, outstanding_ack) acks; 1386 struct outstanding_ack *ack = NULL; 1387 1388 TAILQ_INIT(&acks); 1389 1390 if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { 1391 error("Couldn't open local file \"%s\" for reading: %s", 1392 local_path, strerror(errno)); 1393 return(-1); 1394 } 1395 if (fstat(local_fd, &sb) == -1) { 1396 error("Couldn't fstat local file \"%s\": %s", 1397 local_path, strerror(errno)); 1398 close(local_fd); 1399 return(-1); 1400 } 1401 if (!S_ISREG(sb.st_mode)) { 1402 error("%s is not a regular file", local_path); 1403 close(local_fd); 1404 return(-1); 1405 } 1406 stat_to_attrib(&sb, &a); 1407 1408 a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; 1409 a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; 1410 a.perm &= 0777; 1411 if (!pflag) 1412 a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; 1413 1414 buffer_init(&msg); 1415 1416 /* Send open request */ 1417 id = conn->msg_id++; 1418 buffer_put_char(&msg, SSH2_FXP_OPEN); 1419 buffer_put_int(&msg, id); 1420 buffer_put_cstring(&msg, remote_path); 1421 buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); 1422 encode_attrib(&msg, &a); 1423 send_msg(conn, &msg); 1424 debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); 1425 1426 buffer_clear(&msg); 1427 1428 handle = get_handle(conn, id, &handle_len, 1429 "remote open(\"%s\")", remote_path); 1430 if (handle == NULL) { 1431 close(local_fd); 1432 buffer_free(&msg); 1433 return -1; 1434 } 1435 1436 startid = ackid = id + 1; 1437 data = xmalloc(conn->transfer_buflen); 1438 1439 /* Read from local and write to remote */ 1440 offset = progress_counter = 0; 1441 if (showprogress) 1442 start_progress_meter(local_path, sb.st_size, 1443 &progress_counter); 1444 1445 for (;;) { 1446 int len; 1447 1448 /* 1449 * Can't use atomicio here because it returns 0 on EOF, 1450 * thus losing the last block of the file. 1451 * Simulate an EOF on interrupt, allowing ACKs from the 1452 * server to drain. 1453 */ 1454 if (interrupted || status != SSH2_FX_OK) 1455 len = 0; 1456 else do 1457 len = read(local_fd, data, conn->transfer_buflen); 1458 while ((len == -1) && 1459 (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK)); 1460 1461 if (len == -1) 1462 fatal("Couldn't read from \"%s\": %s", local_path, 1463 strerror(errno)); 1464 1465 if (len != 0) { 1466 ack = xcalloc(1, sizeof(*ack)); 1467 ack->id = ++id; 1468 ack->offset = offset; 1469 ack->len = len; 1470 TAILQ_INSERT_TAIL(&acks, ack, tq); 1471 1472 buffer_clear(&msg); 1473 buffer_put_char(&msg, SSH2_FXP_WRITE); 1474 buffer_put_int(&msg, ack->id); 1475 buffer_put_string(&msg, handle, handle_len); 1476 buffer_put_int64(&msg, offset); 1477 buffer_put_string(&msg, data, len); 1478 send_msg(conn, &msg); 1479 debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u", 1480 id, (unsigned long long)offset, len); 1481 } else if (TAILQ_FIRST(&acks) == NULL) 1482 break; 1483 1484 if (ack == NULL) 1485 fatal("Unexpected ACK %u", id); 1486 1487 if (id == startid || len == 0 || 1488 id - ackid >= conn->num_requests) { 1489 u_int r_id; 1490 1491 buffer_clear(&msg); 1492 get_msg(conn, &msg); 1493 type = buffer_get_char(&msg); 1494 r_id = buffer_get_int(&msg); 1495 1496 if (type != SSH2_FXP_STATUS) 1497 fatal("Expected SSH2_FXP_STATUS(%d) packet, " 1498 "got %d", SSH2_FXP_STATUS, type); 1499 1500 status = buffer_get_int(&msg); 1501 debug3("SSH2_FXP_STATUS %d", status); 1502 1503 /* Find the request in our queue */ 1504 for (ack = TAILQ_FIRST(&acks); 1505 ack != NULL && ack->id != r_id; 1506 ack = TAILQ_NEXT(ack, tq)) 1507 ; 1508 if (ack == NULL) 1509 fatal("Can't find request for ID %u", r_id); 1510 TAILQ_REMOVE(&acks, ack, tq); 1511 debug3("In write loop, ack for %u %u bytes at %lld", 1512 ack->id, ack->len, (long long)ack->offset); 1513 ++ackid; 1514 progress_counter += ack->len; 1515 free(ack); 1516 } 1517 offset += len; 1518 if (offset < 0) 1519 fatal("%s: offset < 0", __func__); 1520 } 1521 buffer_free(&msg); 1522 1523 if (showprogress) 1524 stop_progress_meter(); 1525 free(data); 1526 1527 if (status != SSH2_FX_OK) { 1528 error("Couldn't write to remote file \"%s\": %s", 1529 remote_path, fx2txt(status)); 1530 status = -1; 1531 } 1532 1533 if (close(local_fd) == -1) { 1534 error("Couldn't close local file \"%s\": %s", local_path, 1535 strerror(errno)); 1536 status = -1; 1537 } 1538 1539 /* Override umask and utimes if asked */ 1540 if (pflag) 1541 do_fsetstat(conn, handle, handle_len, &a); 1542 1543 if (do_close(conn, handle, handle_len) != SSH2_FX_OK) 1544 status = -1; 1545 free(handle); 1546 1547 return status; 1548} 1549 1550static int 1551upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, 1552 int pflag, int printflag, int depth) 1553{ 1554 int ret = 0, status; 1555 DIR *dirp; 1556 struct dirent *dp; 1557 char *filename, *new_src, *new_dst; 1558 struct stat sb; 1559 Attrib a; 1560 1561 if (depth >= MAX_DIR_DEPTH) { 1562 error("Maximum directory depth exceeded: %d levels", depth); 1563 return -1; 1564 } 1565 1566 if (stat(src, &sb) == -1) { 1567 error("Couldn't stat directory \"%s\": %s", 1568 src, strerror(errno)); 1569 return -1; 1570 } 1571 if (!S_ISDIR(sb.st_mode)) { 1572 error("\"%s\" is not a directory", src); 1573 return -1; 1574 } 1575 if (printflag) 1576 printf("Entering %s\n", src); 1577 1578 attrib_clear(&a); 1579 stat_to_attrib(&sb, &a); 1580 a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; 1581 a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; 1582 a.perm &= 01777; 1583 if (!pflag) 1584 a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; 1585 1586 status = do_mkdir(conn, dst, &a, 0); 1587 /* 1588 * we lack a portable status for errno EEXIST, 1589 * so if we get a SSH2_FX_FAILURE back we must check 1590 * if it was created successfully. 1591 */ 1592 if (status != SSH2_FX_OK) { 1593 if (status != SSH2_FX_FAILURE) 1594 return -1; 1595 if (do_stat(conn, dst, 0) == NULL) 1596 return -1; 1597 } 1598 1599 if ((dirp = opendir(src)) == NULL) { 1600 error("Failed to open dir \"%s\": %s", src, strerror(errno)); 1601 return -1; 1602 } 1603 1604 while (((dp = readdir(dirp)) != NULL) && !interrupted) { 1605 if (dp->d_ino == 0) 1606 continue; 1607 filename = dp->d_name; 1608 new_dst = path_append(dst, filename); 1609 new_src = path_append(src, filename); 1610 1611 if (lstat(new_src, &sb) == -1) { 1612 logit("%s: lstat failed: %s", filename, 1613 strerror(errno)); 1614 ret = -1; 1615 } else if (S_ISDIR(sb.st_mode)) { 1616 if (strcmp(filename, ".") == 0 || 1617 strcmp(filename, "..") == 0) 1618 continue; 1619 1620 if (upload_dir_internal(conn, new_src, new_dst, 1621 pflag, printflag, depth + 1) == -1) 1622 ret = -1; 1623 } else if (S_ISREG(sb.st_mode)) { 1624 if (do_upload(conn, new_src, new_dst, pflag) == -1) { 1625 error("Uploading of file %s to %s failed!", 1626 new_src, new_dst); 1627 ret = -1; 1628 } 1629 } else 1630 logit("%s: not a regular file\n", filename); 1631 free(new_dst); 1632 free(new_src); 1633 } 1634 1635 do_setstat(conn, dst, &a); 1636 1637 (void) closedir(dirp); 1638 return ret; 1639} 1640 1641int 1642upload_dir(struct sftp_conn *conn, char *src, char *dst, int printflag, 1643 int pflag) 1644{ 1645 char *dst_canon; 1646 int ret; 1647 1648 if ((dst_canon = do_realpath(conn, dst)) == NULL) { 1649 error("Unable to canonicalise path \"%s\"", dst); 1650 return -1; 1651 } 1652 1653 ret = upload_dir_internal(conn, src, dst_canon, pflag, printflag, 0); 1654 free(dst_canon); 1655 return ret; 1656} 1657 1658char * 1659path_append(char *p1, char *p2) 1660{ 1661 char *ret; 1662 size_t len = strlen(p1) + strlen(p2) + 2; 1663 1664 ret = xmalloc(len); 1665 strlcpy(ret, p1, len); 1666 if (p1[0] != '\0' && p1[strlen(p1) - 1] != '/') 1667 strlcat(ret, "/", len); 1668 strlcat(ret, p2, len); 1669 1670 return(ret); 1671} 1672 1673