1 /* $OpenBSD: scp.c,v 1.186 2016/05/25 23:48:45 schwarze Exp $ */ 2 /* 3 * scp - secure remote copy. This is basically patched BSD rcp which 4 * uses ssh to do the data transfer (instead of using rcmd). 5 * 6 * NOTE: This version should NOT be suid root. (This uses ssh to 7 * do the transfer and ssh has the necessary privileges.) 8 * 9 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 10 * 11 * As far as I am concerned, the code I have written for this software 12 * can be used freely for any purpose. Any derived versions of this 13 * software must be clearly marked as such, and if the derived work is 14 * incompatible with the protocol description in the RFC file, it must be 15 * called by a name other than "ssh" or "Secure Shell". 16 */ 17 /* 18 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 19 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Parts from: 44 * 45 * Copyright (c) 1983, 1990, 1992, 1993, 1995 46 * The Regents of the University of California. All rights reserved. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 */ 73 74 #include <sys/param.h> /* roundup MAX */ 75 #include <sys/types.h> 76 #include <sys/poll.h> 77 #include <sys/wait.h> 78 #include <sys/stat.h> 79 #include <sys/time.h> 80 #include <sys/uio.h> 81 82 #include <ctype.h> 83 #include <dirent.h> 84 #include <errno.h> 85 #include <fcntl.h> 86 #include <locale.h> 87 #include <pwd.h> 88 #include <signal.h> 89 #include <stdarg.h> 90 #include <stdio.h> 91 #include <stdlib.h> 92 #include <string.h> 93 #include <time.h> 94 #include <unistd.h> 95 #include <limits.h> 96 #include <vis.h> 97 98 #include "xmalloc.h" 99 #include "atomicio.h" 100 #include "pathnames.h" 101 #include "log.h" 102 #include "misc.h" 103 #include "progressmeter.h" 104 #include "utf8.h" 105 106 #define COPY_BUFLEN 16384 107 108 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 109 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 110 111 /* Struct for addargs */ 112 arglist args; 113 arglist remote_remote_args; 114 115 /* Bandwidth limit */ 116 long long limit_kbps = 0; 117 struct bwlimit bwlimit; 118 119 /* Name of current file being transferred. */ 120 char *curfile; 121 122 /* This is set to non-zero to enable verbose mode. */ 123 int verbose_mode = 0; 124 125 /* This is set to zero if the progressmeter is not desired. */ 126 int showprogress = 1; 127 128 /* 129 * This is set to non-zero if remote-remote copy should be piped 130 * through this process. 131 */ 132 int throughlocal = 0; 133 134 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 135 char *ssh_program = _PATH_SSH_PROGRAM; 136 137 /* This is used to store the pid of ssh_program */ 138 pid_t do_cmd_pid = -1; 139 140 static void 141 killchild(int signo) 142 { 143 if (do_cmd_pid > 1) { 144 kill(do_cmd_pid, signo ? signo : SIGTERM); 145 waitpid(do_cmd_pid, NULL, 0); 146 } 147 148 if (signo) 149 _exit(1); 150 exit(1); 151 } 152 153 static void 154 suspchild(int signo) 155 { 156 int status; 157 158 if (do_cmd_pid > 1) { 159 kill(do_cmd_pid, signo); 160 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 161 errno == EINTR) 162 ; 163 kill(getpid(), SIGSTOP); 164 } 165 } 166 167 static int 168 do_local_cmd(arglist *a) 169 { 170 u_int i; 171 int status; 172 pid_t pid; 173 174 if (a->num == 0) 175 fatal("do_local_cmd: no arguments"); 176 177 if (verbose_mode) { 178 fprintf(stderr, "Executing:"); 179 for (i = 0; i < a->num; i++) 180 fmprintf(stderr, " %s", a->list[i]); 181 fprintf(stderr, "\n"); 182 } 183 if ((pid = fork()) == -1) 184 fatal("do_local_cmd: fork: %s", strerror(errno)); 185 186 if (pid == 0) { 187 execvp(a->list[0], a->list); 188 perror(a->list[0]); 189 exit(1); 190 } 191 192 do_cmd_pid = pid; 193 signal(SIGTERM, killchild); 194 signal(SIGINT, killchild); 195 signal(SIGHUP, killchild); 196 197 while (waitpid(pid, &status, 0) == -1) 198 if (errno != EINTR) 199 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 200 201 do_cmd_pid = -1; 202 203 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 204 return (-1); 205 206 return (0); 207 } 208 209 /* 210 * This function executes the given command as the specified user on the 211 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 212 * assigns the input and output file descriptors on success. 213 */ 214 215 int 216 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 217 { 218 int pin[2], pout[2], reserved[2]; 219 220 if (verbose_mode) 221 fmprintf(stderr, 222 "Executing: program %s host %s, user %s, command %s\n", 223 ssh_program, host, 224 remuser ? remuser : "(unspecified)", cmd); 225 226 /* 227 * Reserve two descriptors so that the real pipes won't get 228 * descriptors 0 and 1 because that will screw up dup2 below. 229 */ 230 if (pipe(reserved) < 0) 231 fatal("pipe: %s", strerror(errno)); 232 233 /* Create a socket pair for communicating with ssh. */ 234 if (pipe(pin) < 0) 235 fatal("pipe: %s", strerror(errno)); 236 if (pipe(pout) < 0) 237 fatal("pipe: %s", strerror(errno)); 238 239 /* Free the reserved descriptors. */ 240 close(reserved[0]); 241 close(reserved[1]); 242 243 signal(SIGTSTP, suspchild); 244 signal(SIGTTIN, suspchild); 245 signal(SIGTTOU, suspchild); 246 247 /* Fork a child to execute the command on the remote host using ssh. */ 248 do_cmd_pid = fork(); 249 if (do_cmd_pid == 0) { 250 /* Child. */ 251 close(pin[1]); 252 close(pout[0]); 253 dup2(pin[0], 0); 254 dup2(pout[1], 1); 255 close(pin[0]); 256 close(pout[1]); 257 258 replacearg(&args, 0, "%s", ssh_program); 259 if (remuser != NULL) { 260 addargs(&args, "-l"); 261 addargs(&args, "%s", remuser); 262 } 263 addargs(&args, "--"); 264 addargs(&args, "%s", host); 265 addargs(&args, "%s", cmd); 266 267 execvp(ssh_program, args.list); 268 perror(ssh_program); 269 exit(1); 270 } else if (do_cmd_pid == -1) { 271 fatal("fork: %s", strerror(errno)); 272 } 273 /* Parent. Close the other side, and return the local side. */ 274 close(pin[0]); 275 *fdout = pin[1]; 276 close(pout[1]); 277 *fdin = pout[0]; 278 signal(SIGTERM, killchild); 279 signal(SIGINT, killchild); 280 signal(SIGHUP, killchild); 281 return 0; 282 } 283 284 /* 285 * This functions executes a command simlar to do_cmd(), but expects the 286 * input and output descriptors to be setup by a previous call to do_cmd(). 287 * This way the input and output of two commands can be connected. 288 */ 289 int 290 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 291 { 292 pid_t pid; 293 int status; 294 295 if (verbose_mode) 296 fmprintf(stderr, 297 "Executing: 2nd program %s host %s, user %s, command %s\n", 298 ssh_program, host, 299 remuser ? remuser : "(unspecified)", cmd); 300 301 /* Fork a child to execute the command on the remote host using ssh. */ 302 pid = fork(); 303 if (pid == 0) { 304 dup2(fdin, 0); 305 dup2(fdout, 1); 306 307 replacearg(&args, 0, "%s", ssh_program); 308 if (remuser != NULL) { 309 addargs(&args, "-l"); 310 addargs(&args, "%s", remuser); 311 } 312 addargs(&args, "--"); 313 addargs(&args, "%s", host); 314 addargs(&args, "%s", cmd); 315 316 execvp(ssh_program, args.list); 317 perror(ssh_program); 318 exit(1); 319 } else if (pid == -1) { 320 fatal("fork: %s", strerror(errno)); 321 } 322 while (waitpid(pid, &status, 0) == -1) 323 if (errno != EINTR) 324 fatal("do_cmd2: waitpid: %s", strerror(errno)); 325 return 0; 326 } 327 328 typedef struct { 329 size_t cnt; 330 char *buf; 331 } BUF; 332 333 BUF *allocbuf(BUF *, int, int); 334 void lostconn(int); 335 int okname(char *); 336 void run_err(const char *,...); 337 void verifydir(char *); 338 339 struct passwd *pwd; 340 uid_t userid; 341 int errs, remin, remout; 342 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 343 344 #define CMDNEEDS 64 345 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 346 347 int response(void); 348 void rsource(char *, struct stat *); 349 void sink(int, char *[]); 350 void source(int, char *[]); 351 void tolocal(int, char *[]); 352 void toremote(char *, int, char *[]); 353 void usage(void); 354 355 int 356 main(int argc, char **argv) 357 { 358 int ch, fflag, tflag, status, n; 359 char *targ, **newargv; 360 const char *errstr; 361 extern char *optarg; 362 extern int optind; 363 364 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 365 sanitise_stdfd(); 366 367 setlocale(LC_CTYPE, ""); 368 369 /* Copy argv, because we modify it */ 370 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 371 for (n = 0; n < argc; n++) 372 newargv[n] = xstrdup(argv[n]); 373 argv = newargv; 374 375 memset(&args, '\0', sizeof(args)); 376 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 377 args.list = remote_remote_args.list = NULL; 378 addargs(&args, "%s", ssh_program); 379 addargs(&args, "-x"); 380 addargs(&args, "-oForwardAgent=no"); 381 addargs(&args, "-oPermitLocalCommand=no"); 382 addargs(&args, "-oClearAllForwardings=yes"); 383 384 fflag = tflag = 0; 385 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 386 switch (ch) { 387 /* User-visible flags. */ 388 case '1': 389 case '2': 390 case '4': 391 case '6': 392 case 'C': 393 addargs(&args, "-%c", ch); 394 addargs(&remote_remote_args, "-%c", ch); 395 break; 396 case '3': 397 throughlocal = 1; 398 break; 399 case 'o': 400 case 'c': 401 case 'i': 402 case 'F': 403 addargs(&remote_remote_args, "-%c", ch); 404 addargs(&remote_remote_args, "%s", optarg); 405 addargs(&args, "-%c", ch); 406 addargs(&args, "%s", optarg); 407 break; 408 case 'P': 409 addargs(&remote_remote_args, "-p"); 410 addargs(&remote_remote_args, "%s", optarg); 411 addargs(&args, "-p"); 412 addargs(&args, "%s", optarg); 413 break; 414 case 'B': 415 addargs(&remote_remote_args, "-oBatchmode=yes"); 416 addargs(&args, "-oBatchmode=yes"); 417 break; 418 case 'l': 419 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 420 &errstr); 421 if (errstr != NULL) 422 usage(); 423 limit_kbps *= 1024; /* kbps */ 424 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 425 break; 426 case 'p': 427 pflag = 1; 428 break; 429 case 'r': 430 iamrecursive = 1; 431 break; 432 case 'S': 433 ssh_program = xstrdup(optarg); 434 break; 435 case 'v': 436 addargs(&args, "-v"); 437 addargs(&remote_remote_args, "-v"); 438 verbose_mode = 1; 439 break; 440 case 'q': 441 addargs(&args, "-q"); 442 addargs(&remote_remote_args, "-q"); 443 showprogress = 0; 444 break; 445 446 /* Server options. */ 447 case 'd': 448 targetshouldbedirectory = 1; 449 break; 450 case 'f': /* "from" */ 451 iamremote = 1; 452 fflag = 1; 453 break; 454 case 't': /* "to" */ 455 iamremote = 1; 456 tflag = 1; 457 break; 458 default: 459 usage(); 460 } 461 argc -= optind; 462 argv += optind; 463 464 if ((pwd = getpwuid(userid = getuid())) == NULL) 465 fatal("unknown user %u", (u_int) userid); 466 467 if (!isatty(STDOUT_FILENO)) 468 showprogress = 0; 469 470 if (pflag) { 471 /* Cannot pledge: -p allows setuid/setgid files... */ 472 } else { 473 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 474 NULL) == -1) { 475 perror("pledge"); 476 exit(1); 477 } 478 } 479 480 remin = STDIN_FILENO; 481 remout = STDOUT_FILENO; 482 483 if (fflag) { 484 /* Follow "protocol", send data. */ 485 (void) response(); 486 source(argc, argv); 487 exit(errs != 0); 488 } 489 if (tflag) { 490 /* Receive data. */ 491 sink(argc, argv); 492 exit(errs != 0); 493 } 494 if (argc < 2) 495 usage(); 496 if (argc > 2) 497 targetshouldbedirectory = 1; 498 499 remin = remout = -1; 500 do_cmd_pid = -1; 501 /* Command to be executed on remote system using "ssh". */ 502 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 503 verbose_mode ? " -v" : "", 504 iamrecursive ? " -r" : "", pflag ? " -p" : "", 505 targetshouldbedirectory ? " -d" : ""); 506 507 (void) signal(SIGPIPE, lostconn); 508 509 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 510 toremote(targ, argc, argv); 511 else { 512 if (targetshouldbedirectory) 513 verifydir(argv[argc - 1]); 514 tolocal(argc, argv); /* Dest is local host. */ 515 } 516 /* 517 * Finally check the exit status of the ssh process, if one was forked 518 * and no error has occurred yet 519 */ 520 if (do_cmd_pid != -1 && errs == 0) { 521 if (remin != -1) 522 (void) close(remin); 523 if (remout != -1) 524 (void) close(remout); 525 if (waitpid(do_cmd_pid, &status, 0) == -1) 526 errs = 1; 527 else { 528 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 529 errs = 1; 530 } 531 } 532 exit(errs != 0); 533 } 534 535 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 536 static int 537 scpio(void *_cnt, size_t s) 538 { 539 off_t *cnt = (off_t *)_cnt; 540 541 *cnt += s; 542 if (limit_kbps > 0) 543 bandwidth_limit(&bwlimit, s); 544 return 0; 545 } 546 547 static int 548 do_times(int fd, int verb, const struct stat *sb) 549 { 550 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 551 char buf[(20 + 7 + 2) * 2 + 2]; 552 553 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 554 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 555 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 556 if (verb) { 557 fprintf(stderr, "File mtime %lld atime %lld\n", 558 (long long)sb->st_mtime, (long long)sb->st_atime); 559 fprintf(stderr, "Sending file timestamps: %s", buf); 560 } 561 (void) atomicio(vwrite, fd, buf, strlen(buf)); 562 return (response()); 563 } 564 565 void 566 toremote(char *targ, int argc, char **argv) 567 { 568 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 569 arglist alist; 570 int i; 571 u_int j; 572 573 memset(&alist, '\0', sizeof(alist)); 574 alist.list = NULL; 575 576 *targ++ = 0; 577 if (*targ == 0) 578 targ = "."; 579 580 arg = xstrdup(argv[argc - 1]); 581 if ((thost = strrchr(arg, '@'))) { 582 /* user@host */ 583 *thost++ = 0; 584 tuser = arg; 585 if (*tuser == '\0') 586 tuser = NULL; 587 } else { 588 thost = arg; 589 tuser = NULL; 590 } 591 592 if (tuser != NULL && !okname(tuser)) { 593 free(arg); 594 return; 595 } 596 597 for (i = 0; i < argc - 1; i++) { 598 src = colon(argv[i]); 599 if (src && throughlocal) { /* extended remote to remote */ 600 *src++ = 0; 601 if (*src == 0) 602 src = "."; 603 host = strrchr(argv[i], '@'); 604 if (host) { 605 *host++ = 0; 606 host = cleanhostname(host); 607 suser = argv[i]; 608 if (*suser == '\0') 609 suser = pwd->pw_name; 610 else if (!okname(suser)) 611 continue; 612 } else { 613 host = cleanhostname(argv[i]); 614 suser = NULL; 615 } 616 xasprintf(&bp, "%s -f %s%s", cmd, 617 *src == '-' ? "-- " : "", src); 618 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 619 exit(1); 620 free(bp); 621 host = cleanhostname(thost); 622 xasprintf(&bp, "%s -t %s%s", cmd, 623 *targ == '-' ? "-- " : "", targ); 624 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 625 exit(1); 626 free(bp); 627 (void) close(remin); 628 (void) close(remout); 629 remin = remout = -1; 630 } else if (src) { /* standard remote to remote */ 631 freeargs(&alist); 632 addargs(&alist, "%s", ssh_program); 633 addargs(&alist, "-x"); 634 addargs(&alist, "-oClearAllForwardings=yes"); 635 addargs(&alist, "-n"); 636 for (j = 0; j < remote_remote_args.num; j++) { 637 addargs(&alist, "%s", 638 remote_remote_args.list[j]); 639 } 640 *src++ = 0; 641 if (*src == 0) 642 src = "."; 643 host = strrchr(argv[i], '@'); 644 645 if (host) { 646 *host++ = 0; 647 host = cleanhostname(host); 648 suser = argv[i]; 649 if (*suser == '\0') 650 suser = pwd->pw_name; 651 else if (!okname(suser)) 652 continue; 653 addargs(&alist, "-l"); 654 addargs(&alist, "%s", suser); 655 } else { 656 host = cleanhostname(argv[i]); 657 } 658 addargs(&alist, "--"); 659 addargs(&alist, "%s", host); 660 addargs(&alist, "%s", cmd); 661 addargs(&alist, "%s", src); 662 addargs(&alist, "%s%s%s:%s", 663 tuser ? tuser : "", tuser ? "@" : "", 664 thost, targ); 665 if (do_local_cmd(&alist) != 0) 666 errs = 1; 667 } else { /* local to remote */ 668 if (remin == -1) { 669 xasprintf(&bp, "%s -t %s%s", cmd, 670 *targ == '-' ? "-- " : "", targ); 671 host = cleanhostname(thost); 672 if (do_cmd(host, tuser, bp, &remin, 673 &remout) < 0) 674 exit(1); 675 if (response() < 0) 676 exit(1); 677 free(bp); 678 } 679 source(1, argv + i); 680 } 681 } 682 free(arg); 683 } 684 685 void 686 tolocal(int argc, char **argv) 687 { 688 char *bp, *host, *src, *suser; 689 arglist alist; 690 int i; 691 692 memset(&alist, '\0', sizeof(alist)); 693 alist.list = NULL; 694 695 for (i = 0; i < argc - 1; i++) { 696 if (!(src = colon(argv[i]))) { /* Local to local. */ 697 freeargs(&alist); 698 addargs(&alist, "%s", _PATH_CP); 699 if (iamrecursive) 700 addargs(&alist, "-r"); 701 if (pflag) 702 addargs(&alist, "-p"); 703 addargs(&alist, "--"); 704 addargs(&alist, "%s", argv[i]); 705 addargs(&alist, "%s", argv[argc-1]); 706 if (do_local_cmd(&alist)) 707 ++errs; 708 continue; 709 } 710 *src++ = 0; 711 if (*src == 0) 712 src = "."; 713 if ((host = strrchr(argv[i], '@')) == NULL) { 714 host = argv[i]; 715 suser = NULL; 716 } else { 717 *host++ = 0; 718 suser = argv[i]; 719 if (*suser == '\0') 720 suser = pwd->pw_name; 721 } 722 host = cleanhostname(host); 723 xasprintf(&bp, "%s -f %s%s", 724 cmd, *src == '-' ? "-- " : "", src); 725 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 726 free(bp); 727 ++errs; 728 continue; 729 } 730 free(bp); 731 sink(1, argv + argc - 1); 732 (void) close(remin); 733 remin = remout = -1; 734 } 735 } 736 737 void 738 source(int argc, char **argv) 739 { 740 struct stat stb; 741 static BUF buffer; 742 BUF *bp; 743 off_t i, statbytes; 744 size_t amt, nr; 745 int fd = -1, haderr, indx; 746 char *last, *name, buf[2048], encname[PATH_MAX]; 747 int len; 748 749 for (indx = 0; indx < argc; ++indx) { 750 name = argv[indx]; 751 statbytes = 0; 752 len = strlen(name); 753 while (len > 1 && name[len-1] == '/') 754 name[--len] = '\0'; 755 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 756 goto syserr; 757 if (strchr(name, '\n') != NULL) { 758 strnvis(encname, name, sizeof(encname), VIS_NL); 759 name = encname; 760 } 761 if (fstat(fd, &stb) < 0) { 762 syserr: run_err("%s: %s", name, strerror(errno)); 763 goto next; 764 } 765 if (stb.st_size < 0) { 766 run_err("%s: %s", name, "Negative file size"); 767 goto next; 768 } 769 unset_nonblock(fd); 770 switch (stb.st_mode & S_IFMT) { 771 case S_IFREG: 772 break; 773 case S_IFDIR: 774 if (iamrecursive) { 775 rsource(name, &stb); 776 goto next; 777 } 778 /* FALLTHROUGH */ 779 default: 780 run_err("%s: not a regular file", name); 781 goto next; 782 } 783 if ((last = strrchr(name, '/')) == NULL) 784 last = name; 785 else 786 ++last; 787 curfile = last; 788 if (pflag) { 789 if (do_times(remout, verbose_mode, &stb) < 0) 790 goto next; 791 } 792 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 793 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 794 (u_int) (stb.st_mode & FILEMODEMASK), 795 (long long)stb.st_size, last); 796 if (verbose_mode) 797 fmprintf(stderr, "Sending file modes: %s", buf); 798 (void) atomicio(vwrite, remout, buf, strlen(buf)); 799 if (response() < 0) 800 goto next; 801 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 802 next: if (fd != -1) { 803 (void) close(fd); 804 fd = -1; 805 } 806 continue; 807 } 808 if (showprogress) 809 start_progress_meter(curfile, stb.st_size, &statbytes); 810 set_nonblock(remout); 811 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 812 amt = bp->cnt; 813 if (i + (off_t)amt > stb.st_size) 814 amt = stb.st_size - i; 815 if (!haderr) { 816 if ((nr = atomicio(read, fd, 817 bp->buf, amt)) != amt) { 818 haderr = errno; 819 memset(bp->buf + nr, 0, amt - nr); 820 } 821 } 822 /* Keep writing after error to retain sync */ 823 if (haderr) { 824 (void)atomicio(vwrite, remout, bp->buf, amt); 825 memset(bp->buf, 0, amt); 826 continue; 827 } 828 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 829 &statbytes) != amt) 830 haderr = errno; 831 } 832 unset_nonblock(remout); 833 834 if (fd != -1) { 835 if (close(fd) < 0 && !haderr) 836 haderr = errno; 837 fd = -1; 838 } 839 if (!haderr) 840 (void) atomicio(vwrite, remout, "", 1); 841 else 842 run_err("%s: %s", name, strerror(haderr)); 843 (void) response(); 844 if (showprogress) 845 stop_progress_meter(); 846 } 847 } 848 849 void 850 rsource(char *name, struct stat *statp) 851 { 852 DIR *dirp; 853 struct dirent *dp; 854 char *last, *vect[1], path[PATH_MAX]; 855 856 if (!(dirp = opendir(name))) { 857 run_err("%s: %s", name, strerror(errno)); 858 return; 859 } 860 last = strrchr(name, '/'); 861 if (last == NULL) 862 last = name; 863 else 864 last++; 865 if (pflag) { 866 if (do_times(remout, verbose_mode, statp) < 0) { 867 closedir(dirp); 868 return; 869 } 870 } 871 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 872 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 873 if (verbose_mode) 874 fmprintf(stderr, "Entering directory: %s", path); 875 (void) atomicio(vwrite, remout, path, strlen(path)); 876 if (response() < 0) { 877 closedir(dirp); 878 return; 879 } 880 while ((dp = readdir(dirp)) != NULL) { 881 if (dp->d_ino == 0) 882 continue; 883 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 884 continue; 885 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 886 run_err("%s/%s: name too long", name, dp->d_name); 887 continue; 888 } 889 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 890 vect[0] = path; 891 source(1, vect); 892 } 893 (void) closedir(dirp); 894 (void) atomicio(vwrite, remout, "E\n", 2); 895 (void) response(); 896 } 897 898 void 899 sink(int argc, char **argv) 900 { 901 static BUF buffer; 902 struct stat stb; 903 enum { 904 YES, NO, DISPLAYED 905 } wrerr; 906 BUF *bp; 907 off_t i; 908 size_t j, count; 909 int amt, exists, first, ofd; 910 mode_t mode, omode, mask; 911 off_t size, statbytes; 912 unsigned long long ull; 913 int setimes, targisdir, wrerrno = 0; 914 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 915 struct timeval tv[2]; 916 917 #define atime tv[0] 918 #define mtime tv[1] 919 #define SCREWUP(str) { why = str; goto screwup; } 920 921 setimes = targisdir = 0; 922 mask = umask(0); 923 if (!pflag) 924 (void) umask(mask); 925 if (argc != 1) { 926 run_err("ambiguous target"); 927 exit(1); 928 } 929 targ = *argv; 930 if (targetshouldbedirectory) 931 verifydir(targ); 932 933 (void) atomicio(vwrite, remout, "", 1); 934 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 935 targisdir = 1; 936 for (first = 1;; first = 0) { 937 cp = buf; 938 if (atomicio(read, remin, cp, 1) != 1) 939 return; 940 if (*cp++ == '\n') 941 SCREWUP("unexpected <newline>"); 942 do { 943 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 944 SCREWUP("lost connection"); 945 *cp++ = ch; 946 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 947 *cp = 0; 948 if (verbose_mode) 949 fmprintf(stderr, "Sink: %s", buf); 950 951 if (buf[0] == '\01' || buf[0] == '\02') { 952 if (iamremote == 0) { 953 (void) snmprintf(visbuf, sizeof(visbuf), 954 NULL, "%s", buf + 1); 955 (void) atomicio(vwrite, STDERR_FILENO, 956 visbuf, strlen(visbuf)); 957 } 958 if (buf[0] == '\02') 959 exit(1); 960 ++errs; 961 continue; 962 } 963 if (buf[0] == 'E') { 964 (void) atomicio(vwrite, remout, "", 1); 965 return; 966 } 967 if (ch == '\n') 968 *--cp = 0; 969 970 cp = buf; 971 if (*cp == 'T') { 972 setimes++; 973 cp++; 974 if (!isdigit((unsigned char)*cp)) 975 SCREWUP("mtime.sec not present"); 976 ull = strtoull(cp, &cp, 10); 977 if (!cp || *cp++ != ' ') 978 SCREWUP("mtime.sec not delimited"); 979 if ((time_t)ull < 0 || 980 (unsigned long long)(time_t)ull != ull) 981 setimes = 0; /* out of range */ 982 mtime.tv_sec = ull; 983 mtime.tv_usec = strtol(cp, &cp, 10); 984 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 985 mtime.tv_usec > 999999) 986 SCREWUP("mtime.usec not delimited"); 987 if (!isdigit((unsigned char)*cp)) 988 SCREWUP("atime.sec not present"); 989 ull = strtoull(cp, &cp, 10); 990 if (!cp || *cp++ != ' ') 991 SCREWUP("atime.sec not delimited"); 992 if ((time_t)ull < 0 || 993 (unsigned long long)(time_t)ull != ull) 994 setimes = 0; /* out of range */ 995 atime.tv_sec = ull; 996 atime.tv_usec = strtol(cp, &cp, 10); 997 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 998 atime.tv_usec > 999999) 999 SCREWUP("atime.usec not delimited"); 1000 (void) atomicio(vwrite, remout, "", 1); 1001 continue; 1002 } 1003 if (*cp != 'C' && *cp != 'D') { 1004 /* 1005 * Check for the case "rcp remote:foo\* local:bar". 1006 * In this case, the line "No match." can be returned 1007 * by the shell before the rcp command on the remote is 1008 * executed so the ^Aerror_message convention isn't 1009 * followed. 1010 */ 1011 if (first) { 1012 run_err("%s", cp); 1013 exit(1); 1014 } 1015 SCREWUP("expected control record"); 1016 } 1017 mode = 0; 1018 for (++cp; cp < buf + 5; cp++) { 1019 if (*cp < '0' || *cp > '7') 1020 SCREWUP("bad mode"); 1021 mode = (mode << 3) | (*cp - '0'); 1022 } 1023 if (*cp++ != ' ') 1024 SCREWUP("mode not delimited"); 1025 1026 for (size = 0; isdigit((unsigned char)*cp);) 1027 size = size * 10 + (*cp++ - '0'); 1028 if (*cp++ != ' ') 1029 SCREWUP("size not delimited"); 1030 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1031 run_err("error: unexpected filename: %s", cp); 1032 exit(1); 1033 } 1034 if (targisdir) { 1035 static char *namebuf; 1036 static size_t cursize; 1037 size_t need; 1038 1039 need = strlen(targ) + strlen(cp) + 250; 1040 if (need > cursize) { 1041 free(namebuf); 1042 namebuf = xmalloc(need); 1043 cursize = need; 1044 } 1045 (void) snprintf(namebuf, need, "%s%s%s", targ, 1046 strcmp(targ, "/") ? "/" : "", cp); 1047 np = namebuf; 1048 } else 1049 np = targ; 1050 curfile = cp; 1051 exists = stat(np, &stb) == 0; 1052 if (buf[0] == 'D') { 1053 int mod_flag = pflag; 1054 if (!iamrecursive) 1055 SCREWUP("received directory without -r"); 1056 if (exists) { 1057 if (!S_ISDIR(stb.st_mode)) { 1058 errno = ENOTDIR; 1059 goto bad; 1060 } 1061 if (pflag) 1062 (void) chmod(np, mode); 1063 } else { 1064 /* Handle copying from a read-only 1065 directory */ 1066 mod_flag = 1; 1067 if (mkdir(np, mode | S_IRWXU) < 0) 1068 goto bad; 1069 } 1070 vect[0] = xstrdup(np); 1071 sink(1, vect); 1072 if (setimes) { 1073 setimes = 0; 1074 if (utimes(vect[0], tv) < 0) 1075 run_err("%s: set times: %s", 1076 vect[0], strerror(errno)); 1077 } 1078 if (mod_flag) 1079 (void) chmod(vect[0], mode); 1080 free(vect[0]); 1081 continue; 1082 } 1083 omode = mode; 1084 mode |= S_IWUSR; 1085 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1086 bad: run_err("%s: %s", np, strerror(errno)); 1087 continue; 1088 } 1089 (void) atomicio(vwrite, remout, "", 1); 1090 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1091 (void) close(ofd); 1092 continue; 1093 } 1094 cp = bp->buf; 1095 wrerr = NO; 1096 1097 statbytes = 0; 1098 if (showprogress) 1099 start_progress_meter(curfile, size, &statbytes); 1100 set_nonblock(remin); 1101 for (count = i = 0; i < size; i += bp->cnt) { 1102 amt = bp->cnt; 1103 if (i + amt > size) 1104 amt = size - i; 1105 count += amt; 1106 do { 1107 j = atomicio6(read, remin, cp, amt, 1108 scpio, &statbytes); 1109 if (j == 0) { 1110 run_err("%s", j != EPIPE ? 1111 strerror(errno) : 1112 "dropped connection"); 1113 exit(1); 1114 } 1115 amt -= j; 1116 cp += j; 1117 } while (amt > 0); 1118 1119 if (count == bp->cnt) { 1120 /* Keep reading so we stay sync'd up. */ 1121 if (wrerr == NO) { 1122 if (atomicio(vwrite, ofd, bp->buf, 1123 count) != count) { 1124 wrerr = YES; 1125 wrerrno = errno; 1126 } 1127 } 1128 count = 0; 1129 cp = bp->buf; 1130 } 1131 } 1132 unset_nonblock(remin); 1133 if (count != 0 && wrerr == NO && 1134 atomicio(vwrite, ofd, bp->buf, count) != count) { 1135 wrerr = YES; 1136 wrerrno = errno; 1137 } 1138 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1139 ftruncate(ofd, size) != 0) { 1140 run_err("%s: truncate: %s", np, strerror(errno)); 1141 wrerr = DISPLAYED; 1142 } 1143 if (pflag) { 1144 if (exists || omode != mode) 1145 if (fchmod(ofd, omode)) { 1146 run_err("%s: set mode: %s", 1147 np, strerror(errno)); 1148 wrerr = DISPLAYED; 1149 } 1150 } else { 1151 if (!exists && omode != mode) 1152 if (fchmod(ofd, omode & ~mask)) { 1153 run_err("%s: set mode: %s", 1154 np, strerror(errno)); 1155 wrerr = DISPLAYED; 1156 } 1157 } 1158 if (close(ofd) == -1) { 1159 wrerr = YES; 1160 wrerrno = errno; 1161 } 1162 (void) response(); 1163 if (showprogress) 1164 stop_progress_meter(); 1165 if (setimes && wrerr == NO) { 1166 setimes = 0; 1167 if (utimes(np, tv) < 0) { 1168 run_err("%s: set times: %s", 1169 np, strerror(errno)); 1170 wrerr = DISPLAYED; 1171 } 1172 } 1173 switch (wrerr) { 1174 case YES: 1175 run_err("%s: %s", np, strerror(wrerrno)); 1176 break; 1177 case NO: 1178 (void) atomicio(vwrite, remout, "", 1); 1179 break; 1180 case DISPLAYED: 1181 break; 1182 } 1183 } 1184 screwup: 1185 run_err("protocol error: %s", why); 1186 exit(1); 1187 } 1188 1189 int 1190 response(void) 1191 { 1192 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1193 1194 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1195 lostconn(0); 1196 1197 cp = rbuf; 1198 switch (resp) { 1199 case 0: /* ok */ 1200 return (0); 1201 default: 1202 *cp++ = resp; 1203 /* FALLTHROUGH */ 1204 case 1: /* error, followed by error msg */ 1205 case 2: /* fatal error, "" */ 1206 do { 1207 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1208 lostconn(0); 1209 *cp++ = ch; 1210 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1211 1212 if (!iamremote) { 1213 cp[-1] = '\0'; 1214 (void) snmprintf(visbuf, sizeof(visbuf), 1215 NULL, "%s\n", rbuf); 1216 (void) atomicio(vwrite, STDERR_FILENO, 1217 visbuf, strlen(visbuf)); 1218 } 1219 ++errs; 1220 if (resp == 1) 1221 return (-1); 1222 exit(1); 1223 } 1224 /* NOTREACHED */ 1225 } 1226 1227 void 1228 usage(void) 1229 { 1230 (void) fprintf(stderr, 1231 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1232 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1233 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1234 exit(1); 1235 } 1236 1237 void 1238 run_err(const char *fmt,...) 1239 { 1240 static FILE *fp; 1241 va_list ap; 1242 1243 ++errs; 1244 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1245 (void) fprintf(fp, "%c", 0x01); 1246 (void) fprintf(fp, "scp: "); 1247 va_start(ap, fmt); 1248 (void) vfprintf(fp, fmt, ap); 1249 va_end(ap); 1250 (void) fprintf(fp, "\n"); 1251 (void) fflush(fp); 1252 } 1253 1254 if (!iamremote) { 1255 va_start(ap, fmt); 1256 vfmprintf(stderr, fmt, ap); 1257 va_end(ap); 1258 fprintf(stderr, "\n"); 1259 } 1260 } 1261 1262 void 1263 verifydir(char *cp) 1264 { 1265 struct stat stb; 1266 1267 if (!stat(cp, &stb)) { 1268 if (S_ISDIR(stb.st_mode)) 1269 return; 1270 errno = ENOTDIR; 1271 } 1272 run_err("%s: %s", cp, strerror(errno)); 1273 killchild(0); 1274 } 1275 1276 int 1277 okname(char *cp0) 1278 { 1279 int c; 1280 char *cp; 1281 1282 cp = cp0; 1283 do { 1284 c = (int)*cp; 1285 if (c & 0200) 1286 goto bad; 1287 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1288 switch (c) { 1289 case '\'': 1290 case '"': 1291 case '`': 1292 case ' ': 1293 case '#': 1294 goto bad; 1295 default: 1296 break; 1297 } 1298 } 1299 } while (*++cp); 1300 return (1); 1301 1302 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1303 return (0); 1304 } 1305 1306 BUF * 1307 allocbuf(BUF *bp, int fd, int blksize) 1308 { 1309 size_t size; 1310 struct stat stb; 1311 1312 if (fstat(fd, &stb) < 0) { 1313 run_err("fstat: %s", strerror(errno)); 1314 return (0); 1315 } 1316 size = roundup(stb.st_blksize, blksize); 1317 if (size == 0) 1318 size = blksize; 1319 if (bp->cnt >= size) 1320 return (bp); 1321 if (bp->buf == NULL) 1322 bp->buf = xmalloc(size); 1323 else 1324 bp->buf = xreallocarray(bp->buf, 1, size); 1325 memset(bp->buf, 0, size); 1326 bp->cnt = size; 1327 return (bp); 1328 } 1329 1330 void 1331 lostconn(int signo) 1332 { 1333 if (!iamremote) 1334 (void)write(STDERR_FILENO, "lost connection\n", 16); 1335 if (signo) 1336 _exit(1); 1337 else 1338 exit(1); 1339 } 1340