1 /* 2 * scp - secure remote copy. This is basically patched BSD rcp which 3 * uses ssh to do the data transfer (instead of using rcmd). 4 * 5 * NOTE: This version should NOT be suid root. (This uses ssh to 6 * do the transfer and ssh has the necessary privileges.) 7 * 8 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 9 * 10 * As far as I am concerned, the code I have written for this software 11 * can be used freely for any purpose. Any derived versions of this 12 * software must be clearly marked as such, and if the derived work is 13 * incompatible with the protocol description in the RFC file, it must be 14 * called by a name other than "ssh" or "Secure Shell". 15 */ 16 /* 17 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 18 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 1. Redistributions of source code must retain the above copyright 24 * notice, this list of conditions and the following disclaimer. 25 * 2. Redistributions in binary form must reproduce the above copyright 26 * notice, this list of conditions and the following disclaimer in the 27 * documentation and/or other materials provided with the distribution. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 32 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 * Parts from: 43 * 44 * Copyright (c) 1983, 1990, 1992, 1993, 1995 45 * The Regents of the University of California. All rights reserved. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 */ 72 73 #include "includes.h" 74 RCSID("$OpenBSD: scp.c,v 1.130 2006/01/31 10:35:43 djm Exp $"); 75 76 #include "xmalloc.h" 77 #include "atomicio.h" 78 #include "pathnames.h" 79 #include "log.h" 80 #include "misc.h" 81 #include "progressmeter.h" 82 83 extern char *__progname; 84 85 void bwlimit(int); 86 87 /* Struct for addargs */ 88 arglist args; 89 90 /* Bandwidth limit */ 91 off_t limit_rate = 0; 92 93 /* Name of current file being transferred. */ 94 char *curfile; 95 96 /* This is set to non-zero to enable verbose mode. */ 97 int verbose_mode = 0; 98 99 /* This is set to zero if the progressmeter is not desired. */ 100 int showprogress = 1; 101 102 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 103 char *ssh_program = _PATH_SSH_PROGRAM; 104 105 /* This is used to store the pid of ssh_program */ 106 pid_t do_cmd_pid = -1; 107 108 static void 109 killchild(int signo) 110 { 111 if (do_cmd_pid > 1) { 112 kill(do_cmd_pid, signo ? signo : SIGTERM); 113 waitpid(do_cmd_pid, NULL, 0); 114 } 115 116 if (signo) 117 _exit(1); 118 exit(1); 119 } 120 121 static int 122 do_local_cmd(arglist *a) 123 { 124 u_int i; 125 int status; 126 pid_t pid; 127 128 if (a->num == 0) 129 fatal("do_local_cmd: no arguments"); 130 131 if (verbose_mode) { 132 fprintf(stderr, "Executing:"); 133 for (i = 0; i < a->num; i++) 134 fprintf(stderr, " %s", a->list[i]); 135 fprintf(stderr, "\n"); 136 } 137 if ((pid = fork()) == -1) 138 fatal("do_local_cmd: fork: %s", strerror(errno)); 139 140 if (pid == 0) { 141 execvp(a->list[0], a->list); 142 perror(a->list[0]); 143 exit(1); 144 } 145 146 do_cmd_pid = pid; 147 signal(SIGTERM, killchild); 148 signal(SIGINT, killchild); 149 signal(SIGHUP, killchild); 150 151 while (waitpid(pid, &status, 0) == -1) 152 if (errno != EINTR) 153 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 154 155 do_cmd_pid = -1; 156 157 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 158 return (-1); 159 160 return (0); 161 } 162 163 /* 164 * This function executes the given command as the specified user on the 165 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 166 * assigns the input and output file descriptors on success. 167 */ 168 169 int 170 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc) 171 { 172 int pin[2], pout[2], reserved[2]; 173 174 if (verbose_mode) 175 fprintf(stderr, 176 "Executing: program %s host %s, user %s, command %s\n", 177 ssh_program, host, 178 remuser ? remuser : "(unspecified)", cmd); 179 180 /* 181 * Reserve two descriptors so that the real pipes won't get 182 * descriptors 0 and 1 because that will screw up dup2 below. 183 */ 184 pipe(reserved); 185 186 /* Create a socket pair for communicating with ssh. */ 187 if (pipe(pin) < 0) 188 fatal("pipe: %s", strerror(errno)); 189 if (pipe(pout) < 0) 190 fatal("pipe: %s", strerror(errno)); 191 192 /* Free the reserved descriptors. */ 193 close(reserved[0]); 194 close(reserved[1]); 195 196 /* Fork a child to execute the command on the remote host using ssh. */ 197 do_cmd_pid = fork(); 198 if (do_cmd_pid == 0) { 199 /* Child. */ 200 close(pin[1]); 201 close(pout[0]); 202 dup2(pin[0], 0); 203 dup2(pout[1], 1); 204 close(pin[0]); 205 close(pout[1]); 206 207 replacearg(&args, 0, "%s", ssh_program); 208 if (remuser != NULL) 209 addargs(&args, "-l%s", remuser); 210 addargs(&args, "%s", host); 211 addargs(&args, "%s", cmd); 212 213 execvp(ssh_program, args.list); 214 perror(ssh_program); 215 exit(1); 216 } else if (do_cmd_pid == -1) { 217 fatal("fork: %s", strerror(errno)); 218 } 219 /* Parent. Close the other side, and return the local side. */ 220 close(pin[0]); 221 *fdout = pin[1]; 222 close(pout[1]); 223 *fdin = pout[0]; 224 signal(SIGTERM, killchild); 225 signal(SIGINT, killchild); 226 signal(SIGHUP, killchild); 227 return 0; 228 } 229 230 typedef struct { 231 size_t cnt; 232 char *buf; 233 } BUF; 234 235 BUF *allocbuf(BUF *, int, int); 236 void lostconn(int); 237 void nospace(void); 238 int okname(char *); 239 void run_err(const char *,...); 240 void verifydir(char *); 241 242 struct passwd *pwd; 243 uid_t userid; 244 int errs, remin, remout; 245 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 246 247 #define CMDNEEDS 64 248 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 249 250 int response(void); 251 void rsource(char *, struct stat *); 252 void sink(int, char *[]); 253 void source(int, char *[]); 254 void tolocal(int, char *[]); 255 void toremote(char *, int, char *[]); 256 void usage(void); 257 258 int 259 main(int argc, char **argv) 260 { 261 int ch, fflag, tflag, status; 262 double speed; 263 char *targ, *endp; 264 extern char *optarg; 265 extern int optind; 266 267 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 268 sanitise_stdfd(); 269 270 __progname = ssh_get_progname(argv[0]); 271 272 memset(&args, '\0', sizeof(args)); 273 args.list = NULL; 274 addargs(&args, "%s", ssh_program); 275 addargs(&args, "-x"); 276 addargs(&args, "-oForwardAgent no"); 277 addargs(&args, "-oPermitLocalCommand no"); 278 addargs(&args, "-oClearAllForwardings yes"); 279 280 fflag = tflag = 0; 281 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1) 282 switch (ch) { 283 /* User-visible flags. */ 284 case '1': 285 case '2': 286 case '4': 287 case '6': 288 case 'C': 289 addargs(&args, "-%c", ch); 290 break; 291 case 'o': 292 case 'c': 293 case 'i': 294 case 'F': 295 addargs(&args, "-%c%s", ch, optarg); 296 break; 297 case 'P': 298 addargs(&args, "-p%s", optarg); 299 break; 300 case 'B': 301 addargs(&args, "-oBatchmode yes"); 302 break; 303 case 'l': 304 speed = strtod(optarg, &endp); 305 if (speed <= 0 || *endp != '\0') 306 usage(); 307 limit_rate = speed * 1024; 308 break; 309 case 'p': 310 pflag = 1; 311 break; 312 case 'r': 313 iamrecursive = 1; 314 break; 315 case 'S': 316 ssh_program = xstrdup(optarg); 317 break; 318 case 'v': 319 addargs(&args, "-v"); 320 verbose_mode = 1; 321 break; 322 case 'q': 323 addargs(&args, "-q"); 324 showprogress = 0; 325 break; 326 327 /* Server options. */ 328 case 'd': 329 targetshouldbedirectory = 1; 330 break; 331 case 'f': /* "from" */ 332 iamremote = 1; 333 fflag = 1; 334 break; 335 case 't': /* "to" */ 336 iamremote = 1; 337 tflag = 1; 338 #ifdef HAVE_CYGWIN 339 setmode(0, O_BINARY); 340 #endif 341 break; 342 default: 343 usage(); 344 } 345 argc -= optind; 346 argv += optind; 347 348 if ((pwd = getpwuid(userid = getuid())) == NULL) 349 fatal("unknown user %u", (u_int) userid); 350 351 if (!isatty(STDERR_FILENO)) 352 showprogress = 0; 353 354 remin = STDIN_FILENO; 355 remout = STDOUT_FILENO; 356 357 if (fflag) { 358 /* Follow "protocol", send data. */ 359 (void) response(); 360 source(argc, argv); 361 exit(errs != 0); 362 } 363 if (tflag) { 364 /* Receive data. */ 365 sink(argc, argv); 366 exit(errs != 0); 367 } 368 if (argc < 2) 369 usage(); 370 if (argc > 2) 371 targetshouldbedirectory = 1; 372 373 remin = remout = -1; 374 do_cmd_pid = -1; 375 /* Command to be executed on remote system using "ssh". */ 376 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 377 verbose_mode ? " -v" : "", 378 iamrecursive ? " -r" : "", pflag ? " -p" : "", 379 targetshouldbedirectory ? " -d" : ""); 380 381 (void) signal(SIGPIPE, lostconn); 382 383 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 384 toremote(targ, argc, argv); 385 else { 386 if (targetshouldbedirectory) 387 verifydir(argv[argc - 1]); 388 tolocal(argc, argv); /* Dest is local host. */ 389 } 390 /* 391 * Finally check the exit status of the ssh process, if one was forked 392 * and no error has occured yet 393 */ 394 if (do_cmd_pid != -1 && errs == 0) { 395 if (remin != -1) 396 (void) close(remin); 397 if (remout != -1) 398 (void) close(remout); 399 if (waitpid(do_cmd_pid, &status, 0) == -1) 400 errs = 1; 401 else { 402 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 403 errs = 1; 404 } 405 } 406 exit(errs != 0); 407 } 408 409 void 410 toremote(char *targ, int argc, char **argv) 411 { 412 int i, len; 413 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 414 arglist alist; 415 416 memset(&alist, '\0', sizeof(alist)); 417 alist.list = NULL; 418 419 *targ++ = 0; 420 if (*targ == 0) 421 targ = "."; 422 423 arg = xstrdup(argv[argc - 1]); 424 if ((thost = strrchr(arg, '@'))) { 425 /* user@host */ 426 *thost++ = 0; 427 tuser = arg; 428 if (*tuser == '\0') 429 tuser = NULL; 430 } else { 431 thost = arg; 432 tuser = NULL; 433 } 434 435 if (tuser != NULL && !okname(tuser)) { 436 xfree(arg); 437 return; 438 } 439 440 for (i = 0; i < argc - 1; i++) { 441 src = colon(argv[i]); 442 if (src) { /* remote to remote */ 443 freeargs(&alist); 444 addargs(&alist, "%s", ssh_program); 445 if (verbose_mode) 446 addargs(&alist, "-v"); 447 addargs(&alist, "-x"); 448 addargs(&alist, "-oClearAllForwardings yes"); 449 addargs(&alist, "-n"); 450 451 *src++ = 0; 452 if (*src == 0) 453 src = "."; 454 host = strrchr(argv[i], '@'); 455 456 if (host) { 457 *host++ = 0; 458 host = cleanhostname(host); 459 suser = argv[i]; 460 if (*suser == '\0') 461 suser = pwd->pw_name; 462 else if (!okname(suser)) 463 continue; 464 addargs(&alist, "-l"); 465 addargs(&alist, "%s", suser); 466 } else { 467 host = cleanhostname(argv[i]); 468 } 469 addargs(&alist, "%s", host); 470 addargs(&alist, "%s", cmd); 471 addargs(&alist, "%s", src); 472 addargs(&alist, "%s%s%s:%s", 473 tuser ? tuser : "", tuser ? "@" : "", 474 thost, targ); 475 if (do_local_cmd(&alist) != 0) 476 errs = 1; 477 } else { /* local to remote */ 478 if (remin == -1) { 479 len = strlen(targ) + CMDNEEDS + 20; 480 bp = xmalloc(len); 481 (void) snprintf(bp, len, "%s -t %s", cmd, targ); 482 host = cleanhostname(thost); 483 if (do_cmd(host, tuser, bp, &remin, 484 &remout, argc) < 0) 485 exit(1); 486 if (response() < 0) 487 exit(1); 488 (void) xfree(bp); 489 } 490 source(1, argv + i); 491 } 492 } 493 } 494 495 void 496 tolocal(int argc, char **argv) 497 { 498 int i, len; 499 char *bp, *host, *src, *suser; 500 arglist alist; 501 502 memset(&alist, '\0', sizeof(alist)); 503 alist.list = NULL; 504 505 for (i = 0; i < argc - 1; i++) { 506 if (!(src = colon(argv[i]))) { /* Local to local. */ 507 freeargs(&alist); 508 addargs(&alist, "%s", _PATH_CP); 509 if (iamrecursive) 510 addargs(&alist, "-r"); 511 if (pflag) 512 addargs(&alist, "-p"); 513 addargs(&alist, "%s", argv[i]); 514 addargs(&alist, "%s", argv[argc-1]); 515 if (do_local_cmd(&alist)) 516 ++errs; 517 continue; 518 } 519 *src++ = 0; 520 if (*src == 0) 521 src = "."; 522 if ((host = strrchr(argv[i], '@')) == NULL) { 523 host = argv[i]; 524 suser = NULL; 525 } else { 526 *host++ = 0; 527 suser = argv[i]; 528 if (*suser == '\0') 529 suser = pwd->pw_name; 530 } 531 host = cleanhostname(host); 532 len = strlen(src) + CMDNEEDS + 20; 533 bp = xmalloc(len); 534 (void) snprintf(bp, len, "%s -f %s", cmd, src); 535 if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) { 536 (void) xfree(bp); 537 ++errs; 538 continue; 539 } 540 xfree(bp); 541 sink(1, argv + argc - 1); 542 (void) close(remin); 543 remin = remout = -1; 544 } 545 } 546 547 void 548 source(int argc, char **argv) 549 { 550 struct stat stb; 551 static BUF buffer; 552 BUF *bp; 553 off_t i, amt, statbytes; 554 size_t result; 555 int fd = -1, haderr, indx; 556 char *last, *name, buf[2048]; 557 int len; 558 559 for (indx = 0; indx < argc; ++indx) { 560 name = argv[indx]; 561 statbytes = 0; 562 len = strlen(name); 563 while (len > 1 && name[len-1] == '/') 564 name[--len] = '\0'; 565 if (strchr(name, '\n') != NULL) { 566 run_err("%s: skipping, filename contains a newline", 567 name); 568 goto next; 569 } 570 if ((fd = open(name, O_RDONLY, 0)) < 0) 571 goto syserr; 572 if (fstat(fd, &stb) < 0) { 573 syserr: run_err("%s: %s", name, strerror(errno)); 574 goto next; 575 } 576 switch (stb.st_mode & S_IFMT) { 577 case S_IFREG: 578 break; 579 case S_IFDIR: 580 if (iamrecursive) { 581 rsource(name, &stb); 582 goto next; 583 } 584 /* FALLTHROUGH */ 585 default: 586 run_err("%s: not a regular file", name); 587 goto next; 588 } 589 if ((last = strrchr(name, '/')) == NULL) 590 last = name; 591 else 592 ++last; 593 curfile = last; 594 if (pflag) { 595 /* 596 * Make it compatible with possible future 597 * versions expecting microseconds. 598 */ 599 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", 600 (u_long) stb.st_mtime, 601 (u_long) stb.st_atime); 602 (void) atomicio(vwrite, remout, buf, strlen(buf)); 603 if (response() < 0) 604 goto next; 605 } 606 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 607 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 608 (u_int) (stb.st_mode & FILEMODEMASK), 609 (long long)stb.st_size, last); 610 if (verbose_mode) { 611 fprintf(stderr, "Sending file modes: %s", buf); 612 } 613 (void) atomicio(vwrite, remout, buf, strlen(buf)); 614 if (response() < 0) 615 goto next; 616 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { 617 next: if (fd != -1) { 618 (void) close(fd); 619 fd = -1; 620 } 621 continue; 622 } 623 if (showprogress) 624 start_progress_meter(curfile, stb.st_size, &statbytes); 625 /* Keep writing after an error so that we stay sync'd up. */ 626 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 627 amt = bp->cnt; 628 if (i + amt > stb.st_size) 629 amt = stb.st_size - i; 630 if (!haderr) { 631 result = atomicio(read, fd, bp->buf, amt); 632 if (result != amt) 633 haderr = errno; 634 } 635 if (haderr) 636 (void) atomicio(vwrite, remout, bp->buf, amt); 637 else { 638 result = atomicio(vwrite, remout, bp->buf, amt); 639 if (result != amt) 640 haderr = errno; 641 statbytes += result; 642 } 643 if (limit_rate) 644 bwlimit(amt); 645 } 646 if (showprogress) 647 stop_progress_meter(); 648 649 if (fd != -1) { 650 if (close(fd) < 0 && !haderr) 651 haderr = errno; 652 fd = -1; 653 } 654 if (!haderr) 655 (void) atomicio(vwrite, remout, "", 1); 656 else 657 run_err("%s: %s", name, strerror(haderr)); 658 (void) response(); 659 } 660 } 661 662 void 663 rsource(char *name, struct stat *statp) 664 { 665 DIR *dirp; 666 struct dirent *dp; 667 char *last, *vect[1], path[1100]; 668 669 if (!(dirp = opendir(name))) { 670 run_err("%s: %s", name, strerror(errno)); 671 return; 672 } 673 last = strrchr(name, '/'); 674 if (last == 0) 675 last = name; 676 else 677 last++; 678 if (pflag) { 679 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", 680 (u_long) statp->st_mtime, 681 (u_long) statp->st_atime); 682 (void) atomicio(vwrite, remout, path, strlen(path)); 683 if (response() < 0) { 684 closedir(dirp); 685 return; 686 } 687 } 688 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 689 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 690 if (verbose_mode) 691 fprintf(stderr, "Entering directory: %s", path); 692 (void) atomicio(vwrite, remout, path, strlen(path)); 693 if (response() < 0) { 694 closedir(dirp); 695 return; 696 } 697 while ((dp = readdir(dirp)) != NULL) { 698 if (dp->d_ino == 0) 699 continue; 700 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 701 continue; 702 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 703 run_err("%s/%s: name too long", name, dp->d_name); 704 continue; 705 } 706 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 707 vect[0] = path; 708 source(1, vect); 709 } 710 (void) closedir(dirp); 711 (void) atomicio(vwrite, remout, "E\n", 2); 712 (void) response(); 713 } 714 715 void 716 bwlimit(int amount) 717 { 718 static struct timeval bwstart, bwend; 719 static int lamt, thresh = 16384; 720 u_int64_t waitlen; 721 struct timespec ts, rm; 722 723 if (!timerisset(&bwstart)) { 724 gettimeofday(&bwstart, NULL); 725 return; 726 } 727 728 lamt += amount; 729 if (lamt < thresh) 730 return; 731 732 gettimeofday(&bwend, NULL); 733 timersub(&bwend, &bwstart, &bwend); 734 if (!timerisset(&bwend)) 735 return; 736 737 lamt *= 8; 738 waitlen = (double)1000000L * lamt / limit_rate; 739 740 bwstart.tv_sec = waitlen / 1000000L; 741 bwstart.tv_usec = waitlen % 1000000L; 742 743 if (timercmp(&bwstart, &bwend, >)) { 744 timersub(&bwstart, &bwend, &bwend); 745 746 /* Adjust the wait time */ 747 if (bwend.tv_sec) { 748 thresh /= 2; 749 if (thresh < 2048) 750 thresh = 2048; 751 } else if (bwend.tv_usec < 100) { 752 thresh *= 2; 753 if (thresh > 32768) 754 thresh = 32768; 755 } 756 757 TIMEVAL_TO_TIMESPEC(&bwend, &ts); 758 while (nanosleep(&ts, &rm) == -1) { 759 if (errno != EINTR) 760 break; 761 ts = rm; 762 } 763 } 764 765 lamt = 0; 766 gettimeofday(&bwstart, NULL); 767 } 768 769 void 770 sink(int argc, char **argv) 771 { 772 static BUF buffer; 773 struct stat stb; 774 enum { 775 YES, NO, DISPLAYED 776 } wrerr; 777 BUF *bp; 778 off_t i; 779 size_t j, count; 780 int amt, exists, first, mask, mode, ofd, omode; 781 off_t size, statbytes; 782 int setimes, targisdir, wrerrno = 0; 783 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; 784 struct timeval tv[2]; 785 786 #define atime tv[0] 787 #define mtime tv[1] 788 #define SCREWUP(str) { why = str; goto screwup; } 789 790 setimes = targisdir = 0; 791 mask = umask(0); 792 if (!pflag) 793 (void) umask(mask); 794 if (argc != 1) { 795 run_err("ambiguous target"); 796 exit(1); 797 } 798 targ = *argv; 799 if (targetshouldbedirectory) 800 verifydir(targ); 801 802 (void) atomicio(vwrite, remout, "", 1); 803 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 804 targisdir = 1; 805 for (first = 1;; first = 0) { 806 cp = buf; 807 if (atomicio(read, remin, cp, 1) != 1) 808 return; 809 if (*cp++ == '\n') 810 SCREWUP("unexpected <newline>"); 811 do { 812 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 813 SCREWUP("lost connection"); 814 *cp++ = ch; 815 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 816 *cp = 0; 817 if (verbose_mode) 818 fprintf(stderr, "Sink: %s", buf); 819 820 if (buf[0] == '\01' || buf[0] == '\02') { 821 if (iamremote == 0) 822 (void) atomicio(vwrite, STDERR_FILENO, 823 buf + 1, strlen(buf + 1)); 824 if (buf[0] == '\02') 825 exit(1); 826 ++errs; 827 continue; 828 } 829 if (buf[0] == 'E') { 830 (void) atomicio(vwrite, remout, "", 1); 831 return; 832 } 833 if (ch == '\n') 834 *--cp = 0; 835 836 cp = buf; 837 if (*cp == 'T') { 838 setimes++; 839 cp++; 840 mtime.tv_sec = strtol(cp, &cp, 10); 841 if (!cp || *cp++ != ' ') 842 SCREWUP("mtime.sec not delimited"); 843 mtime.tv_usec = strtol(cp, &cp, 10); 844 if (!cp || *cp++ != ' ') 845 SCREWUP("mtime.usec not delimited"); 846 atime.tv_sec = strtol(cp, &cp, 10); 847 if (!cp || *cp++ != ' ') 848 SCREWUP("atime.sec not delimited"); 849 atime.tv_usec = strtol(cp, &cp, 10); 850 if (!cp || *cp++ != '\0') 851 SCREWUP("atime.usec not delimited"); 852 (void) atomicio(vwrite, remout, "", 1); 853 continue; 854 } 855 if (*cp != 'C' && *cp != 'D') { 856 /* 857 * Check for the case "rcp remote:foo\* local:bar". 858 * In this case, the line "No match." can be returned 859 * by the shell before the rcp command on the remote is 860 * executed so the ^Aerror_message convention isn't 861 * followed. 862 */ 863 if (first) { 864 run_err("%s", cp); 865 exit(1); 866 } 867 SCREWUP("expected control record"); 868 } 869 mode = 0; 870 for (++cp; cp < buf + 5; cp++) { 871 if (*cp < '0' || *cp > '7') 872 SCREWUP("bad mode"); 873 mode = (mode << 3) | (*cp - '0'); 874 } 875 if (*cp++ != ' ') 876 SCREWUP("mode not delimited"); 877 878 for (size = 0; isdigit(*cp);) 879 size = size * 10 + (*cp++ - '0'); 880 if (*cp++ != ' ') 881 SCREWUP("size not delimited"); 882 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 883 run_err("error: unexpected filename: %s", cp); 884 exit(1); 885 } 886 if (targisdir) { 887 static char *namebuf; 888 static size_t cursize; 889 size_t need; 890 891 need = strlen(targ) + strlen(cp) + 250; 892 if (need > cursize) { 893 if (namebuf) 894 xfree(namebuf); 895 namebuf = xmalloc(need); 896 cursize = need; 897 } 898 (void) snprintf(namebuf, need, "%s%s%s", targ, 899 strcmp(targ, "/") ? "/" : "", cp); 900 np = namebuf; 901 } else 902 np = targ; 903 curfile = cp; 904 exists = stat(np, &stb) == 0; 905 if (buf[0] == 'D') { 906 int mod_flag = pflag; 907 if (!iamrecursive) 908 SCREWUP("received directory without -r"); 909 if (exists) { 910 if (!S_ISDIR(stb.st_mode)) { 911 errno = ENOTDIR; 912 goto bad; 913 } 914 if (pflag) 915 (void) chmod(np, mode); 916 } else { 917 /* Handle copying from a read-only 918 directory */ 919 mod_flag = 1; 920 if (mkdir(np, mode | S_IRWXU) < 0) 921 goto bad; 922 } 923 vect[0] = xstrdup(np); 924 sink(1, vect); 925 if (setimes) { 926 setimes = 0; 927 if (utimes(vect[0], tv) < 0) 928 run_err("%s: set times: %s", 929 vect[0], strerror(errno)); 930 } 931 if (mod_flag) 932 (void) chmod(vect[0], mode); 933 if (vect[0]) 934 xfree(vect[0]); 935 continue; 936 } 937 omode = mode; 938 mode |= S_IWRITE; 939 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 940 bad: run_err("%s: %s", np, strerror(errno)); 941 continue; 942 } 943 (void) atomicio(vwrite, remout, "", 1); 944 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) { 945 (void) close(ofd); 946 continue; 947 } 948 cp = bp->buf; 949 wrerr = NO; 950 951 statbytes = 0; 952 if (showprogress) 953 start_progress_meter(curfile, size, &statbytes); 954 for (count = i = 0; i < size; i += 4096) { 955 amt = 4096; 956 if (i + amt > size) 957 amt = size - i; 958 count += amt; 959 do { 960 j = atomicio(read, remin, cp, amt); 961 if (j == 0) { 962 run_err("%s", j ? strerror(errno) : 963 "dropped connection"); 964 exit(1); 965 } 966 amt -= j; 967 cp += j; 968 statbytes += j; 969 } while (amt > 0); 970 971 if (limit_rate) 972 bwlimit(4096); 973 974 if (count == bp->cnt) { 975 /* Keep reading so we stay sync'd up. */ 976 if (wrerr == NO) { 977 if (atomicio(vwrite, ofd, bp->buf, 978 count) != count) { 979 wrerr = YES; 980 wrerrno = errno; 981 } 982 } 983 count = 0; 984 cp = bp->buf; 985 } 986 } 987 if (showprogress) 988 stop_progress_meter(); 989 if (count != 0 && wrerr == NO && 990 atomicio(vwrite, ofd, bp->buf, count) != count) { 991 wrerr = YES; 992 wrerrno = errno; 993 } 994 if (wrerr == NO && ftruncate(ofd, size) != 0) { 995 run_err("%s: truncate: %s", np, strerror(errno)); 996 wrerr = DISPLAYED; 997 } 998 if (pflag) { 999 if (exists || omode != mode) 1000 #ifdef HAVE_FCHMOD 1001 if (fchmod(ofd, omode)) { 1002 #else /* HAVE_FCHMOD */ 1003 if (chmod(np, omode)) { 1004 #endif /* HAVE_FCHMOD */ 1005 run_err("%s: set mode: %s", 1006 np, strerror(errno)); 1007 wrerr = DISPLAYED; 1008 } 1009 } else { 1010 if (!exists && omode != mode) 1011 #ifdef HAVE_FCHMOD 1012 if (fchmod(ofd, omode & ~mask)) { 1013 #else /* HAVE_FCHMOD */ 1014 if (chmod(np, omode & ~mask)) { 1015 #endif /* HAVE_FCHMOD */ 1016 run_err("%s: set mode: %s", 1017 np, strerror(errno)); 1018 wrerr = DISPLAYED; 1019 } 1020 } 1021 if (close(ofd) == -1) { 1022 wrerr = YES; 1023 wrerrno = errno; 1024 } 1025 (void) response(); 1026 if (setimes && wrerr == NO) { 1027 setimes = 0; 1028 if (utimes(np, tv) < 0) { 1029 run_err("%s: set times: %s", 1030 np, strerror(errno)); 1031 wrerr = DISPLAYED; 1032 } 1033 } 1034 switch (wrerr) { 1035 case YES: 1036 run_err("%s: %s", np, strerror(wrerrno)); 1037 break; 1038 case NO: 1039 (void) atomicio(vwrite, remout, "", 1); 1040 break; 1041 case DISPLAYED: 1042 break; 1043 } 1044 } 1045 screwup: 1046 run_err("protocol error: %s", why); 1047 exit(1); 1048 } 1049 1050 int 1051 response(void) 1052 { 1053 char ch, *cp, resp, rbuf[2048]; 1054 1055 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1056 lostconn(0); 1057 1058 cp = rbuf; 1059 switch (resp) { 1060 case 0: /* ok */ 1061 return (0); 1062 default: 1063 *cp++ = resp; 1064 /* FALLTHROUGH */ 1065 case 1: /* error, followed by error msg */ 1066 case 2: /* fatal error, "" */ 1067 do { 1068 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1069 lostconn(0); 1070 *cp++ = ch; 1071 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1072 1073 if (!iamremote) 1074 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1075 ++errs; 1076 if (resp == 1) 1077 return (-1); 1078 exit(1); 1079 } 1080 /* NOTREACHED */ 1081 } 1082 1083 void 1084 usage(void) 1085 { 1086 (void) fprintf(stderr, 1087 "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1088 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1089 " [[user@]host1:]file1 [...] [[user@]host2:]file2\n"); 1090 exit(1); 1091 } 1092 1093 void 1094 run_err(const char *fmt,...) 1095 { 1096 static FILE *fp; 1097 va_list ap; 1098 1099 ++errs; 1100 if (fp == NULL && !(fp = fdopen(remout, "w"))) 1101 return; 1102 (void) fprintf(fp, "%c", 0x01); 1103 (void) fprintf(fp, "scp: "); 1104 va_start(ap, fmt); 1105 (void) vfprintf(fp, fmt, ap); 1106 va_end(ap); 1107 (void) fprintf(fp, "\n"); 1108 (void) fflush(fp); 1109 1110 if (!iamremote) { 1111 va_start(ap, fmt); 1112 vfprintf(stderr, fmt, ap); 1113 va_end(ap); 1114 fprintf(stderr, "\n"); 1115 } 1116 } 1117 1118 void 1119 verifydir(char *cp) 1120 { 1121 struct stat stb; 1122 1123 if (!stat(cp, &stb)) { 1124 if (S_ISDIR(stb.st_mode)) 1125 return; 1126 errno = ENOTDIR; 1127 } 1128 run_err("%s: %s", cp, strerror(errno)); 1129 killchild(0); 1130 } 1131 1132 int 1133 okname(char *cp0) 1134 { 1135 int c; 1136 char *cp; 1137 1138 cp = cp0; 1139 do { 1140 c = (int)*cp; 1141 if (c & 0200) 1142 goto bad; 1143 if (!isalpha(c) && !isdigit(c)) { 1144 switch (c) { 1145 case '\'': 1146 case '"': 1147 case '`': 1148 case ' ': 1149 case '#': 1150 goto bad; 1151 default: 1152 break; 1153 } 1154 } 1155 } while (*++cp); 1156 return (1); 1157 1158 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1159 return (0); 1160 } 1161 1162 BUF * 1163 allocbuf(BUF *bp, int fd, int blksize) 1164 { 1165 size_t size; 1166 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1167 struct stat stb; 1168 1169 if (fstat(fd, &stb) < 0) { 1170 run_err("fstat: %s", strerror(errno)); 1171 return (0); 1172 } 1173 size = roundup(stb.st_blksize, blksize); 1174 if (size == 0) 1175 size = blksize; 1176 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1177 size = blksize; 1178 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1179 if (bp->cnt >= size) 1180 return (bp); 1181 if (bp->buf == NULL) 1182 bp->buf = xmalloc(size); 1183 else 1184 bp->buf = xrealloc(bp->buf, size); 1185 memset(bp->buf, 0, size); 1186 bp->cnt = size; 1187 return (bp); 1188 } 1189 1190 void 1191 lostconn(int signo) 1192 { 1193 if (!iamremote) 1194 write(STDERR_FILENO, "lost connection\n", 16); 1195 if (signo) 1196 _exit(1); 1197 else 1198 exit(1); 1199 } 1200