1 /* $OpenBSD: scp.c,v 1.192 2017/05/31 09:15:42 deraadt 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/types.h> 75 #include <sys/poll.h> 76 #include <sys/wait.h> 77 #include <sys/stat.h> 78 #include <sys/time.h> 79 #include <sys/uio.h> 80 81 #include <ctype.h> 82 #include <dirent.h> 83 #include <errno.h> 84 #include <fcntl.h> 85 #include <locale.h> 86 #include <pwd.h> 87 #include <signal.h> 88 #include <stdarg.h> 89 #include <stdint.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(MAXIMUM(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 fatal("SSH protocol v.1 is no longer supported"); 390 break; 391 case '2': 392 /* Ignored */ 393 break; 394 case '4': 395 case '6': 396 case 'C': 397 addargs(&args, "-%c", ch); 398 addargs(&remote_remote_args, "-%c", ch); 399 break; 400 case '3': 401 throughlocal = 1; 402 break; 403 case 'o': 404 case 'c': 405 case 'i': 406 case 'F': 407 addargs(&remote_remote_args, "-%c", ch); 408 addargs(&remote_remote_args, "%s", optarg); 409 addargs(&args, "-%c", ch); 410 addargs(&args, "%s", optarg); 411 break; 412 case 'P': 413 addargs(&remote_remote_args, "-p"); 414 addargs(&remote_remote_args, "%s", optarg); 415 addargs(&args, "-p"); 416 addargs(&args, "%s", optarg); 417 break; 418 case 'B': 419 addargs(&remote_remote_args, "-oBatchmode=yes"); 420 addargs(&args, "-oBatchmode=yes"); 421 break; 422 case 'l': 423 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 424 &errstr); 425 if (errstr != NULL) 426 usage(); 427 limit_kbps *= 1024; /* kbps */ 428 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 429 break; 430 case 'p': 431 pflag = 1; 432 break; 433 case 'r': 434 iamrecursive = 1; 435 break; 436 case 'S': 437 ssh_program = xstrdup(optarg); 438 break; 439 case 'v': 440 addargs(&args, "-v"); 441 addargs(&remote_remote_args, "-v"); 442 verbose_mode = 1; 443 break; 444 case 'q': 445 addargs(&args, "-q"); 446 addargs(&remote_remote_args, "-q"); 447 showprogress = 0; 448 break; 449 450 /* Server options. */ 451 case 'd': 452 targetshouldbedirectory = 1; 453 break; 454 case 'f': /* "from" */ 455 iamremote = 1; 456 fflag = 1; 457 break; 458 case 't': /* "to" */ 459 iamremote = 1; 460 tflag = 1; 461 break; 462 default: 463 usage(); 464 } 465 argc -= optind; 466 argv += optind; 467 468 if ((pwd = getpwuid(userid = getuid())) == NULL) 469 fatal("unknown user %u", (u_int) userid); 470 471 if (!isatty(STDOUT_FILENO)) 472 showprogress = 0; 473 474 if (pflag) { 475 /* Cannot pledge: -p allows setuid/setgid files... */ 476 } else { 477 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 478 NULL) == -1) { 479 perror("pledge"); 480 exit(1); 481 } 482 } 483 484 remin = STDIN_FILENO; 485 remout = STDOUT_FILENO; 486 487 if (fflag) { 488 /* Follow "protocol", send data. */ 489 (void) response(); 490 source(argc, argv); 491 exit(errs != 0); 492 } 493 if (tflag) { 494 /* Receive data. */ 495 sink(argc, argv); 496 exit(errs != 0); 497 } 498 if (argc < 2) 499 usage(); 500 if (argc > 2) 501 targetshouldbedirectory = 1; 502 503 remin = remout = -1; 504 do_cmd_pid = -1; 505 /* Command to be executed on remote system using "ssh". */ 506 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 507 verbose_mode ? " -v" : "", 508 iamrecursive ? " -r" : "", pflag ? " -p" : "", 509 targetshouldbedirectory ? " -d" : ""); 510 511 (void) signal(SIGPIPE, lostconn); 512 513 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 514 toremote(targ, argc, argv); 515 else { 516 if (targetshouldbedirectory) 517 verifydir(argv[argc - 1]); 518 tolocal(argc, argv); /* Dest is local host. */ 519 } 520 /* 521 * Finally check the exit status of the ssh process, if one was forked 522 * and no error has occurred yet 523 */ 524 if (do_cmd_pid != -1 && errs == 0) { 525 if (remin != -1) 526 (void) close(remin); 527 if (remout != -1) 528 (void) close(remout); 529 if (waitpid(do_cmd_pid, &status, 0) == -1) 530 errs = 1; 531 else { 532 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 533 errs = 1; 534 } 535 } 536 exit(errs != 0); 537 } 538 539 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 540 static int 541 scpio(void *_cnt, size_t s) 542 { 543 off_t *cnt = (off_t *)_cnt; 544 545 *cnt += s; 546 if (limit_kbps > 0) 547 bandwidth_limit(&bwlimit, s); 548 return 0; 549 } 550 551 static int 552 do_times(int fd, int verb, const struct stat *sb) 553 { 554 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 555 char buf[(20 + 7 + 2) * 2 + 2]; 556 557 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 558 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 559 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 560 if (verb) { 561 fprintf(stderr, "File mtime %lld atime %lld\n", 562 (long long)sb->st_mtime, (long long)sb->st_atime); 563 fprintf(stderr, "Sending file timestamps: %s", buf); 564 } 565 (void) atomicio(vwrite, fd, buf, strlen(buf)); 566 return (response()); 567 } 568 569 void 570 toremote(char *targ, int argc, char **argv) 571 { 572 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 573 arglist alist; 574 int i; 575 u_int j; 576 577 memset(&alist, '\0', sizeof(alist)); 578 alist.list = NULL; 579 580 *targ++ = 0; 581 if (*targ == 0) 582 targ = "."; 583 584 arg = xstrdup(argv[argc - 1]); 585 if ((thost = strrchr(arg, '@'))) { 586 /* user@host */ 587 *thost++ = 0; 588 tuser = arg; 589 if (*tuser == '\0') 590 tuser = NULL; 591 } else { 592 thost = arg; 593 tuser = NULL; 594 } 595 596 if (tuser != NULL && !okname(tuser)) { 597 free(arg); 598 return; 599 } 600 601 for (i = 0; i < argc - 1; i++) { 602 src = colon(argv[i]); 603 if (src && throughlocal) { /* extended remote to remote */ 604 *src++ = 0; 605 if (*src == 0) 606 src = "."; 607 host = strrchr(argv[i], '@'); 608 if (host) { 609 *host++ = 0; 610 host = cleanhostname(host); 611 suser = argv[i]; 612 if (*suser == '\0') 613 suser = pwd->pw_name; 614 else if (!okname(suser)) 615 continue; 616 } else { 617 host = cleanhostname(argv[i]); 618 suser = NULL; 619 } 620 xasprintf(&bp, "%s -f %s%s", cmd, 621 *src == '-' ? "-- " : "", src); 622 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 623 exit(1); 624 free(bp); 625 host = cleanhostname(thost); 626 xasprintf(&bp, "%s -t %s%s", cmd, 627 *targ == '-' ? "-- " : "", targ); 628 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 629 exit(1); 630 free(bp); 631 (void) close(remin); 632 (void) close(remout); 633 remin = remout = -1; 634 } else if (src) { /* standard remote to remote */ 635 freeargs(&alist); 636 addargs(&alist, "%s", ssh_program); 637 addargs(&alist, "-x"); 638 addargs(&alist, "-oClearAllForwardings=yes"); 639 addargs(&alist, "-n"); 640 for (j = 0; j < remote_remote_args.num; j++) { 641 addargs(&alist, "%s", 642 remote_remote_args.list[j]); 643 } 644 *src++ = 0; 645 if (*src == 0) 646 src = "."; 647 host = strrchr(argv[i], '@'); 648 649 if (host) { 650 *host++ = 0; 651 host = cleanhostname(host); 652 suser = argv[i]; 653 if (*suser == '\0') 654 suser = pwd->pw_name; 655 else if (!okname(suser)) 656 continue; 657 addargs(&alist, "-l"); 658 addargs(&alist, "%s", suser); 659 } else { 660 host = cleanhostname(argv[i]); 661 } 662 addargs(&alist, "--"); 663 addargs(&alist, "%s", host); 664 addargs(&alist, "%s", cmd); 665 addargs(&alist, "%s", src); 666 addargs(&alist, "%s%s%s:%s", 667 tuser ? tuser : "", tuser ? "@" : "", 668 thost, targ); 669 if (do_local_cmd(&alist) != 0) 670 errs = 1; 671 } else { /* local to remote */ 672 if (remin == -1) { 673 xasprintf(&bp, "%s -t %s%s", cmd, 674 *targ == '-' ? "-- " : "", targ); 675 host = cleanhostname(thost); 676 if (do_cmd(host, tuser, bp, &remin, 677 &remout) < 0) 678 exit(1); 679 if (response() < 0) 680 exit(1); 681 free(bp); 682 } 683 source(1, argv + i); 684 } 685 } 686 free(arg); 687 } 688 689 void 690 tolocal(int argc, char **argv) 691 { 692 char *bp, *host, *src, *suser; 693 arglist alist; 694 int i; 695 696 memset(&alist, '\0', sizeof(alist)); 697 alist.list = NULL; 698 699 for (i = 0; i < argc - 1; i++) { 700 if (!(src = colon(argv[i]))) { /* Local to local. */ 701 freeargs(&alist); 702 addargs(&alist, "%s", _PATH_CP); 703 if (iamrecursive) 704 addargs(&alist, "-r"); 705 if (pflag) 706 addargs(&alist, "-p"); 707 addargs(&alist, "--"); 708 addargs(&alist, "%s", argv[i]); 709 addargs(&alist, "%s", argv[argc-1]); 710 if (do_local_cmd(&alist)) 711 ++errs; 712 continue; 713 } 714 *src++ = 0; 715 if (*src == 0) 716 src = "."; 717 if ((host = strrchr(argv[i], '@')) == NULL) { 718 host = argv[i]; 719 suser = NULL; 720 } else { 721 *host++ = 0; 722 suser = argv[i]; 723 if (*suser == '\0') 724 suser = pwd->pw_name; 725 } 726 host = cleanhostname(host); 727 xasprintf(&bp, "%s -f %s%s", 728 cmd, *src == '-' ? "-- " : "", src); 729 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 730 free(bp); 731 ++errs; 732 continue; 733 } 734 free(bp); 735 sink(1, argv + argc - 1); 736 (void) close(remin); 737 remin = remout = -1; 738 } 739 } 740 741 void 742 source(int argc, char **argv) 743 { 744 struct stat stb; 745 static BUF buffer; 746 BUF *bp; 747 off_t i, statbytes; 748 size_t amt, nr; 749 int fd = -1, haderr, indx; 750 char *last, *name, buf[2048], encname[PATH_MAX]; 751 int len; 752 753 for (indx = 0; indx < argc; ++indx) { 754 name = argv[indx]; 755 statbytes = 0; 756 len = strlen(name); 757 while (len > 1 && name[len-1] == '/') 758 name[--len] = '\0'; 759 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 760 goto syserr; 761 if (strchr(name, '\n') != NULL) { 762 strnvis(encname, name, sizeof(encname), VIS_NL); 763 name = encname; 764 } 765 if (fstat(fd, &stb) < 0) { 766 syserr: run_err("%s: %s", name, strerror(errno)); 767 goto next; 768 } 769 if (stb.st_size < 0) { 770 run_err("%s: %s", name, "Negative file size"); 771 goto next; 772 } 773 unset_nonblock(fd); 774 switch (stb.st_mode & S_IFMT) { 775 case S_IFREG: 776 break; 777 case S_IFDIR: 778 if (iamrecursive) { 779 rsource(name, &stb); 780 goto next; 781 } 782 /* FALLTHROUGH */ 783 default: 784 run_err("%s: not a regular file", name); 785 goto next; 786 } 787 if ((last = strrchr(name, '/')) == NULL) 788 last = name; 789 else 790 ++last; 791 curfile = last; 792 if (pflag) { 793 if (do_times(remout, verbose_mode, &stb) < 0) 794 goto next; 795 } 796 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 797 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 798 (u_int) (stb.st_mode & FILEMODEMASK), 799 (long long)stb.st_size, last); 800 if (verbose_mode) 801 fmprintf(stderr, "Sending file modes: %s", buf); 802 (void) atomicio(vwrite, remout, buf, strlen(buf)); 803 if (response() < 0) 804 goto next; 805 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 806 next: if (fd != -1) { 807 (void) close(fd); 808 fd = -1; 809 } 810 continue; 811 } 812 if (showprogress) 813 start_progress_meter(curfile, stb.st_size, &statbytes); 814 set_nonblock(remout); 815 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 816 amt = bp->cnt; 817 if (i + (off_t)amt > stb.st_size) 818 amt = stb.st_size - i; 819 if (!haderr) { 820 if ((nr = atomicio(read, fd, 821 bp->buf, amt)) != amt) { 822 haderr = errno; 823 memset(bp->buf + nr, 0, amt - nr); 824 } 825 } 826 /* Keep writing after error to retain sync */ 827 if (haderr) { 828 (void)atomicio(vwrite, remout, bp->buf, amt); 829 memset(bp->buf, 0, amt); 830 continue; 831 } 832 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 833 &statbytes) != amt) 834 haderr = errno; 835 } 836 unset_nonblock(remout); 837 838 if (fd != -1) { 839 if (close(fd) < 0 && !haderr) 840 haderr = errno; 841 fd = -1; 842 } 843 if (!haderr) 844 (void) atomicio(vwrite, remout, "", 1); 845 else 846 run_err("%s: %s", name, strerror(haderr)); 847 (void) response(); 848 if (showprogress) 849 stop_progress_meter(); 850 } 851 } 852 853 void 854 rsource(char *name, struct stat *statp) 855 { 856 DIR *dirp; 857 struct dirent *dp; 858 char *last, *vect[1], path[PATH_MAX]; 859 860 if (!(dirp = opendir(name))) { 861 run_err("%s: %s", name, strerror(errno)); 862 return; 863 } 864 last = strrchr(name, '/'); 865 if (last == NULL) 866 last = name; 867 else 868 last++; 869 if (pflag) { 870 if (do_times(remout, verbose_mode, statp) < 0) { 871 closedir(dirp); 872 return; 873 } 874 } 875 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 876 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 877 if (verbose_mode) 878 fmprintf(stderr, "Entering directory: %s", path); 879 (void) atomicio(vwrite, remout, path, strlen(path)); 880 if (response() < 0) { 881 closedir(dirp); 882 return; 883 } 884 while ((dp = readdir(dirp)) != NULL) { 885 if (dp->d_ino == 0) 886 continue; 887 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 888 continue; 889 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 890 run_err("%s/%s: name too long", name, dp->d_name); 891 continue; 892 } 893 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 894 vect[0] = path; 895 source(1, vect); 896 } 897 (void) closedir(dirp); 898 (void) atomicio(vwrite, remout, "E\n", 2); 899 (void) response(); 900 } 901 902 #define TYPE_OVERFLOW(type, val) \ 903 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 904 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 905 (sizeof(type) != 4 && sizeof(type) != 8)) 906 907 void 908 sink(int argc, char **argv) 909 { 910 static BUF buffer; 911 struct stat stb; 912 enum { 913 YES, NO, DISPLAYED 914 } wrerr; 915 BUF *bp; 916 off_t i; 917 size_t j, count; 918 int amt, exists, first, ofd; 919 mode_t mode, omode, mask; 920 off_t size, statbytes; 921 unsigned long long ull; 922 int setimes, targisdir, wrerrno = 0; 923 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 924 struct timeval tv[2]; 925 926 #define atime tv[0] 927 #define mtime tv[1] 928 #define SCREWUP(str) { why = str; goto screwup; } 929 930 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 931 SCREWUP("Unexpected off_t/time_t size"); 932 933 setimes = targisdir = 0; 934 mask = umask(0); 935 if (!pflag) 936 (void) umask(mask); 937 if (argc != 1) { 938 run_err("ambiguous target"); 939 exit(1); 940 } 941 targ = *argv; 942 if (targetshouldbedirectory) 943 verifydir(targ); 944 945 (void) atomicio(vwrite, remout, "", 1); 946 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 947 targisdir = 1; 948 for (first = 1;; first = 0) { 949 cp = buf; 950 if (atomicio(read, remin, cp, 1) != 1) 951 return; 952 if (*cp++ == '\n') 953 SCREWUP("unexpected <newline>"); 954 do { 955 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 956 SCREWUP("lost connection"); 957 *cp++ = ch; 958 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 959 *cp = 0; 960 if (verbose_mode) 961 fmprintf(stderr, "Sink: %s", buf); 962 963 if (buf[0] == '\01' || buf[0] == '\02') { 964 if (iamremote == 0) { 965 (void) snmprintf(visbuf, sizeof(visbuf), 966 NULL, "%s", buf + 1); 967 (void) atomicio(vwrite, STDERR_FILENO, 968 visbuf, strlen(visbuf)); 969 } 970 if (buf[0] == '\02') 971 exit(1); 972 ++errs; 973 continue; 974 } 975 if (buf[0] == 'E') { 976 (void) atomicio(vwrite, remout, "", 1); 977 return; 978 } 979 if (ch == '\n') 980 *--cp = 0; 981 982 cp = buf; 983 if (*cp == 'T') { 984 setimes++; 985 cp++; 986 if (!isdigit((unsigned char)*cp)) 987 SCREWUP("mtime.sec not present"); 988 ull = strtoull(cp, &cp, 10); 989 if (!cp || *cp++ != ' ') 990 SCREWUP("mtime.sec not delimited"); 991 if (TYPE_OVERFLOW(time_t, ull)) 992 setimes = 0; /* out of range */ 993 mtime.tv_sec = ull; 994 mtime.tv_usec = strtol(cp, &cp, 10); 995 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 996 mtime.tv_usec > 999999) 997 SCREWUP("mtime.usec not delimited"); 998 if (!isdigit((unsigned char)*cp)) 999 SCREWUP("atime.sec not present"); 1000 ull = strtoull(cp, &cp, 10); 1001 if (!cp || *cp++ != ' ') 1002 SCREWUP("atime.sec not delimited"); 1003 if (TYPE_OVERFLOW(time_t, ull)) 1004 setimes = 0; /* out of range */ 1005 atime.tv_sec = ull; 1006 atime.tv_usec = strtol(cp, &cp, 10); 1007 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1008 atime.tv_usec > 999999) 1009 SCREWUP("atime.usec not delimited"); 1010 (void) atomicio(vwrite, remout, "", 1); 1011 continue; 1012 } 1013 if (*cp != 'C' && *cp != 'D') { 1014 /* 1015 * Check for the case "rcp remote:foo\* local:bar". 1016 * In this case, the line "No match." can be returned 1017 * by the shell before the rcp command on the remote is 1018 * executed so the ^Aerror_message convention isn't 1019 * followed. 1020 */ 1021 if (first) { 1022 run_err("%s", cp); 1023 exit(1); 1024 } 1025 SCREWUP("expected control record"); 1026 } 1027 mode = 0; 1028 for (++cp; cp < buf + 5; cp++) { 1029 if (*cp < '0' || *cp > '7') 1030 SCREWUP("bad mode"); 1031 mode = (mode << 3) | (*cp - '0'); 1032 } 1033 if (*cp++ != ' ') 1034 SCREWUP("mode not delimited"); 1035 1036 if (!isdigit((unsigned char)*cp)) 1037 SCREWUP("size not present"); 1038 ull = strtoull(cp, &cp, 10); 1039 if (!cp || *cp++ != ' ') 1040 SCREWUP("size not delimited"); 1041 if (TYPE_OVERFLOW(off_t, ull)) 1042 SCREWUP("size out of range"); 1043 size = (off_t)ull; 1044 1045 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1046 run_err("error: unexpected filename: %s", cp); 1047 exit(1); 1048 } 1049 if (targisdir) { 1050 static char *namebuf; 1051 static size_t cursize; 1052 size_t need; 1053 1054 need = strlen(targ) + strlen(cp) + 250; 1055 if (need > cursize) { 1056 free(namebuf); 1057 namebuf = xmalloc(need); 1058 cursize = need; 1059 } 1060 (void) snprintf(namebuf, need, "%s%s%s", targ, 1061 strcmp(targ, "/") ? "/" : "", cp); 1062 np = namebuf; 1063 } else 1064 np = targ; 1065 curfile = cp; 1066 exists = stat(np, &stb) == 0; 1067 if (buf[0] == 'D') { 1068 int mod_flag = pflag; 1069 if (!iamrecursive) 1070 SCREWUP("received directory without -r"); 1071 if (exists) { 1072 if (!S_ISDIR(stb.st_mode)) { 1073 errno = ENOTDIR; 1074 goto bad; 1075 } 1076 if (pflag) 1077 (void) chmod(np, mode); 1078 } else { 1079 /* Handle copying from a read-only 1080 directory */ 1081 mod_flag = 1; 1082 if (mkdir(np, mode | S_IRWXU) < 0) 1083 goto bad; 1084 } 1085 vect[0] = xstrdup(np); 1086 sink(1, vect); 1087 if (setimes) { 1088 setimes = 0; 1089 if (utimes(vect[0], tv) < 0) 1090 run_err("%s: set times: %s", 1091 vect[0], strerror(errno)); 1092 } 1093 if (mod_flag) 1094 (void) chmod(vect[0], mode); 1095 free(vect[0]); 1096 continue; 1097 } 1098 omode = mode; 1099 mode |= S_IWUSR; 1100 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1101 bad: run_err("%s: %s", np, strerror(errno)); 1102 continue; 1103 } 1104 (void) atomicio(vwrite, remout, "", 1); 1105 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1106 (void) close(ofd); 1107 continue; 1108 } 1109 cp = bp->buf; 1110 wrerr = NO; 1111 1112 statbytes = 0; 1113 if (showprogress) 1114 start_progress_meter(curfile, size, &statbytes); 1115 set_nonblock(remin); 1116 for (count = i = 0; i < size; i += bp->cnt) { 1117 amt = bp->cnt; 1118 if (i + amt > size) 1119 amt = size - i; 1120 count += amt; 1121 do { 1122 j = atomicio6(read, remin, cp, amt, 1123 scpio, &statbytes); 1124 if (j == 0) { 1125 run_err("%s", j != EPIPE ? 1126 strerror(errno) : 1127 "dropped connection"); 1128 exit(1); 1129 } 1130 amt -= j; 1131 cp += j; 1132 } while (amt > 0); 1133 1134 if (count == bp->cnt) { 1135 /* Keep reading so we stay sync'd up. */ 1136 if (wrerr == NO) { 1137 if (atomicio(vwrite, ofd, bp->buf, 1138 count) != count) { 1139 wrerr = YES; 1140 wrerrno = errno; 1141 } 1142 } 1143 count = 0; 1144 cp = bp->buf; 1145 } 1146 } 1147 unset_nonblock(remin); 1148 if (count != 0 && wrerr == NO && 1149 atomicio(vwrite, ofd, bp->buf, count) != count) { 1150 wrerr = YES; 1151 wrerrno = errno; 1152 } 1153 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1154 ftruncate(ofd, size) != 0) { 1155 run_err("%s: truncate: %s", np, strerror(errno)); 1156 wrerr = DISPLAYED; 1157 } 1158 if (pflag) { 1159 if (exists || omode != mode) 1160 if (fchmod(ofd, omode)) { 1161 run_err("%s: set mode: %s", 1162 np, strerror(errno)); 1163 wrerr = DISPLAYED; 1164 } 1165 } else { 1166 if (!exists && omode != mode) 1167 if (fchmod(ofd, omode & ~mask)) { 1168 run_err("%s: set mode: %s", 1169 np, strerror(errno)); 1170 wrerr = DISPLAYED; 1171 } 1172 } 1173 if (close(ofd) == -1) { 1174 wrerr = YES; 1175 wrerrno = errno; 1176 } 1177 (void) response(); 1178 if (showprogress) 1179 stop_progress_meter(); 1180 if (setimes && wrerr == NO) { 1181 setimes = 0; 1182 if (utimes(np, tv) < 0) { 1183 run_err("%s: set times: %s", 1184 np, strerror(errno)); 1185 wrerr = DISPLAYED; 1186 } 1187 } 1188 switch (wrerr) { 1189 case YES: 1190 run_err("%s: %s", np, strerror(wrerrno)); 1191 break; 1192 case NO: 1193 (void) atomicio(vwrite, remout, "", 1); 1194 break; 1195 case DISPLAYED: 1196 break; 1197 } 1198 } 1199 screwup: 1200 run_err("protocol error: %s", why); 1201 exit(1); 1202 } 1203 1204 int 1205 response(void) 1206 { 1207 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1208 1209 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1210 lostconn(0); 1211 1212 cp = rbuf; 1213 switch (resp) { 1214 case 0: /* ok */ 1215 return (0); 1216 default: 1217 *cp++ = resp; 1218 /* FALLTHROUGH */ 1219 case 1: /* error, followed by error msg */ 1220 case 2: /* fatal error, "" */ 1221 do { 1222 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1223 lostconn(0); 1224 *cp++ = ch; 1225 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1226 1227 if (!iamremote) { 1228 cp[-1] = '\0'; 1229 (void) snmprintf(visbuf, sizeof(visbuf), 1230 NULL, "%s\n", rbuf); 1231 (void) atomicio(vwrite, STDERR_FILENO, 1232 visbuf, strlen(visbuf)); 1233 } 1234 ++errs; 1235 if (resp == 1) 1236 return (-1); 1237 exit(1); 1238 } 1239 /* NOTREACHED */ 1240 } 1241 1242 void 1243 usage(void) 1244 { 1245 (void) fprintf(stderr, 1246 "usage: scp [-346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1247 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1248 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1249 exit(1); 1250 } 1251 1252 void 1253 run_err(const char *fmt,...) 1254 { 1255 static FILE *fp; 1256 va_list ap; 1257 1258 ++errs; 1259 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1260 (void) fprintf(fp, "%c", 0x01); 1261 (void) fprintf(fp, "scp: "); 1262 va_start(ap, fmt); 1263 (void) vfprintf(fp, fmt, ap); 1264 va_end(ap); 1265 (void) fprintf(fp, "\n"); 1266 (void) fflush(fp); 1267 } 1268 1269 if (!iamremote) { 1270 va_start(ap, fmt); 1271 vfmprintf(stderr, fmt, ap); 1272 va_end(ap); 1273 fprintf(stderr, "\n"); 1274 } 1275 } 1276 1277 void 1278 verifydir(char *cp) 1279 { 1280 struct stat stb; 1281 1282 if (!stat(cp, &stb)) { 1283 if (S_ISDIR(stb.st_mode)) 1284 return; 1285 errno = ENOTDIR; 1286 } 1287 run_err("%s: %s", cp, strerror(errno)); 1288 killchild(0); 1289 } 1290 1291 int 1292 okname(char *cp0) 1293 { 1294 int c; 1295 char *cp; 1296 1297 cp = cp0; 1298 do { 1299 c = (int)*cp; 1300 if (c & 0200) 1301 goto bad; 1302 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1303 switch (c) { 1304 case '\'': 1305 case '"': 1306 case '`': 1307 case ' ': 1308 case '#': 1309 goto bad; 1310 default: 1311 break; 1312 } 1313 } 1314 } while (*++cp); 1315 return (1); 1316 1317 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1318 return (0); 1319 } 1320 1321 BUF * 1322 allocbuf(BUF *bp, int fd, int blksize) 1323 { 1324 size_t size; 1325 struct stat stb; 1326 1327 if (fstat(fd, &stb) < 0) { 1328 run_err("fstat: %s", strerror(errno)); 1329 return (0); 1330 } 1331 size = ROUNDUP(stb.st_blksize, blksize); 1332 if (size == 0) 1333 size = blksize; 1334 if (bp->cnt >= size) 1335 return (bp); 1336 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 1337 bp->cnt = size; 1338 return (bp); 1339 } 1340 1341 void 1342 lostconn(int signo) 1343 { 1344 if (!iamremote) 1345 (void)write(STDERR_FILENO, "lost connection\n", 16); 1346 if (signo) 1347 _exit(1); 1348 else 1349 exit(1); 1350 } 1351