1 /* $OpenBSD: scp.c,v 1.187 2016/09/12 01:22:38 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 "includes.h" 75 76 #include <sys/types.h> 77 #ifdef HAVE_SYS_STAT_H 78 # include <sys/stat.h> 79 #endif 80 #ifdef HAVE_POLL_H 81 #include <poll.h> 82 #else 83 # ifdef HAVE_SYS_POLL_H 84 # include <sys/poll.h> 85 # endif 86 #endif 87 #ifdef HAVE_SYS_TIME_H 88 # include <sys/time.h> 89 #endif 90 #include <sys/wait.h> 91 #include <sys/uio.h> 92 93 #include <ctype.h> 94 #include <dirent.h> 95 #include <errno.h> 96 #include <fcntl.h> 97 #include <limits.h> 98 #include <locale.h> 99 #include <pwd.h> 100 #include <signal.h> 101 #include <stdarg.h> 102 #include <stdio.h> 103 #include <stdlib.h> 104 #include <string.h> 105 #include <time.h> 106 #include <unistd.h> 107 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) 108 #include <vis.h> 109 #endif 110 111 #include "xmalloc.h" 112 #include "atomicio.h" 113 #include "pathnames.h" 114 #include "log.h" 115 #include "misc.h" 116 #include "progressmeter.h" 117 #include "utf8.h" 118 119 extern char *__progname; 120 121 #define COPY_BUFLEN 16384 122 123 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 124 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 125 126 /* Struct for addargs */ 127 arglist args; 128 arglist remote_remote_args; 129 130 /* Bandwidth limit */ 131 long long limit_kbps = 0; 132 struct bwlimit bwlimit; 133 134 /* Name of current file being transferred. */ 135 char *curfile; 136 137 /* This is set to non-zero to enable verbose mode. */ 138 int verbose_mode = 0; 139 140 /* This is set to zero if the progressmeter is not desired. */ 141 int showprogress = 1; 142 143 /* 144 * This is set to non-zero if remote-remote copy should be piped 145 * through this process. 146 */ 147 int throughlocal = 0; 148 149 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 150 char *ssh_program = _PATH_SSH_PROGRAM; 151 152 /* This is used to store the pid of ssh_program */ 153 pid_t do_cmd_pid = -1; 154 155 static void 156 killchild(int signo) 157 { 158 if (do_cmd_pid > 1) { 159 kill(do_cmd_pid, signo ? signo : SIGTERM); 160 waitpid(do_cmd_pid, NULL, 0); 161 } 162 163 if (signo) 164 _exit(1); 165 exit(1); 166 } 167 168 static void 169 suspchild(int signo) 170 { 171 int status; 172 173 if (do_cmd_pid > 1) { 174 kill(do_cmd_pid, signo); 175 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 176 errno == EINTR) 177 ; 178 kill(getpid(), SIGSTOP); 179 } 180 } 181 182 static int 183 do_local_cmd(arglist *a) 184 { 185 u_int i; 186 int status; 187 pid_t pid; 188 189 if (a->num == 0) 190 fatal("do_local_cmd: no arguments"); 191 192 if (verbose_mode) { 193 fprintf(stderr, "Executing:"); 194 for (i = 0; i < a->num; i++) 195 fmprintf(stderr, " %s", a->list[i]); 196 fprintf(stderr, "\n"); 197 } 198 if ((pid = fork()) == -1) 199 fatal("do_local_cmd: fork: %s", strerror(errno)); 200 201 if (pid == 0) { 202 execvp(a->list[0], a->list); 203 perror(a->list[0]); 204 exit(1); 205 } 206 207 do_cmd_pid = pid; 208 signal(SIGTERM, killchild); 209 signal(SIGINT, killchild); 210 signal(SIGHUP, killchild); 211 212 while (waitpid(pid, &status, 0) == -1) 213 if (errno != EINTR) 214 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 215 216 do_cmd_pid = -1; 217 218 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 219 return (-1); 220 221 return (0); 222 } 223 224 /* 225 * This function executes the given command as the specified user on the 226 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 227 * assigns the input and output file descriptors on success. 228 */ 229 230 int 231 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 232 { 233 int pin[2], pout[2], reserved[2]; 234 235 if (verbose_mode) 236 fmprintf(stderr, 237 "Executing: program %s host %s, user %s, command %s\n", 238 ssh_program, host, 239 remuser ? remuser : "(unspecified)", cmd); 240 241 /* 242 * Reserve two descriptors so that the real pipes won't get 243 * descriptors 0 and 1 because that will screw up dup2 below. 244 */ 245 if (pipe(reserved) < 0) 246 fatal("pipe: %s", strerror(errno)); 247 248 /* Create a socket pair for communicating with ssh. */ 249 if (pipe(pin) < 0) 250 fatal("pipe: %s", strerror(errno)); 251 if (pipe(pout) < 0) 252 fatal("pipe: %s", strerror(errno)); 253 254 /* Free the reserved descriptors. */ 255 close(reserved[0]); 256 close(reserved[1]); 257 258 signal(SIGTSTP, suspchild); 259 signal(SIGTTIN, suspchild); 260 signal(SIGTTOU, suspchild); 261 262 /* Fork a child to execute the command on the remote host using ssh. */ 263 do_cmd_pid = fork(); 264 if (do_cmd_pid == 0) { 265 /* Child. */ 266 close(pin[1]); 267 close(pout[0]); 268 dup2(pin[0], 0); 269 dup2(pout[1], 1); 270 close(pin[0]); 271 close(pout[1]); 272 273 replacearg(&args, 0, "%s", ssh_program); 274 if (remuser != NULL) { 275 addargs(&args, "-l"); 276 addargs(&args, "%s", remuser); 277 } 278 addargs(&args, "--"); 279 addargs(&args, "%s", host); 280 addargs(&args, "%s", cmd); 281 282 execvp(ssh_program, args.list); 283 perror(ssh_program); 284 exit(1); 285 } else if (do_cmd_pid == -1) { 286 fatal("fork: %s", strerror(errno)); 287 } 288 /* Parent. Close the other side, and return the local side. */ 289 close(pin[0]); 290 *fdout = pin[1]; 291 close(pout[1]); 292 *fdin = pout[0]; 293 signal(SIGTERM, killchild); 294 signal(SIGINT, killchild); 295 signal(SIGHUP, killchild); 296 return 0; 297 } 298 299 /* 300 * This functions executes a command simlar to do_cmd(), but expects the 301 * input and output descriptors to be setup by a previous call to do_cmd(). 302 * This way the input and output of two commands can be connected. 303 */ 304 int 305 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 306 { 307 pid_t pid; 308 int status; 309 310 if (verbose_mode) 311 fmprintf(stderr, 312 "Executing: 2nd program %s host %s, user %s, command %s\n", 313 ssh_program, host, 314 remuser ? remuser : "(unspecified)", cmd); 315 316 /* Fork a child to execute the command on the remote host using ssh. */ 317 pid = fork(); 318 if (pid == 0) { 319 dup2(fdin, 0); 320 dup2(fdout, 1); 321 322 replacearg(&args, 0, "%s", ssh_program); 323 if (remuser != NULL) { 324 addargs(&args, "-l"); 325 addargs(&args, "%s", remuser); 326 } 327 addargs(&args, "--"); 328 addargs(&args, "%s", host); 329 addargs(&args, "%s", cmd); 330 331 execvp(ssh_program, args.list); 332 perror(ssh_program); 333 exit(1); 334 } else if (pid == -1) { 335 fatal("fork: %s", strerror(errno)); 336 } 337 while (waitpid(pid, &status, 0) == -1) 338 if (errno != EINTR) 339 fatal("do_cmd2: waitpid: %s", strerror(errno)); 340 return 0; 341 } 342 343 typedef struct { 344 size_t cnt; 345 char *buf; 346 } BUF; 347 348 BUF *allocbuf(BUF *, int, int); 349 void lostconn(int); 350 int okname(char *); 351 void run_err(const char *,...); 352 void verifydir(char *); 353 354 struct passwd *pwd; 355 uid_t userid; 356 int errs, remin, remout; 357 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 358 359 #define CMDNEEDS 64 360 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 361 362 int response(void); 363 void rsource(char *, struct stat *); 364 void sink(int, char *[]); 365 void source(int, char *[]); 366 void tolocal(int, char *[]); 367 void toremote(char *, int, char *[]); 368 void usage(void); 369 370 int 371 main(int argc, char **argv) 372 { 373 int ch, fflag, tflag, status, n; 374 char *targ, **newargv; 375 const char *errstr; 376 extern char *optarg; 377 extern int optind; 378 379 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 380 sanitise_stdfd(); 381 382 msetlocale(); 383 384 /* Copy argv, because we modify it */ 385 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 386 for (n = 0; n < argc; n++) 387 newargv[n] = xstrdup(argv[n]); 388 argv = newargv; 389 390 __progname = ssh_get_progname(argv[0]); 391 392 memset(&args, '\0', sizeof(args)); 393 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 394 args.list = remote_remote_args.list = NULL; 395 addargs(&args, "%s", ssh_program); 396 addargs(&args, "-x"); 397 addargs(&args, "-oForwardAgent=no"); 398 addargs(&args, "-oPermitLocalCommand=no"); 399 addargs(&args, "-oClearAllForwardings=yes"); 400 401 fflag = tflag = 0; 402 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 403 switch (ch) { 404 /* User-visible flags. */ 405 case '1': 406 case '2': 407 case '4': 408 case '6': 409 case 'C': 410 addargs(&args, "-%c", ch); 411 addargs(&remote_remote_args, "-%c", ch); 412 break; 413 case '3': 414 throughlocal = 1; 415 break; 416 case 'o': 417 case 'c': 418 case 'i': 419 case 'F': 420 addargs(&remote_remote_args, "-%c", ch); 421 addargs(&remote_remote_args, "%s", optarg); 422 addargs(&args, "-%c", ch); 423 addargs(&args, "%s", optarg); 424 break; 425 case 'P': 426 addargs(&remote_remote_args, "-p"); 427 addargs(&remote_remote_args, "%s", optarg); 428 addargs(&args, "-p"); 429 addargs(&args, "%s", optarg); 430 break; 431 case 'B': 432 addargs(&remote_remote_args, "-oBatchmode=yes"); 433 addargs(&args, "-oBatchmode=yes"); 434 break; 435 case 'l': 436 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 437 &errstr); 438 if (errstr != NULL) 439 usage(); 440 limit_kbps *= 1024; /* kbps */ 441 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 442 break; 443 case 'p': 444 pflag = 1; 445 break; 446 case 'r': 447 iamrecursive = 1; 448 break; 449 case 'S': 450 ssh_program = xstrdup(optarg); 451 break; 452 case 'v': 453 addargs(&args, "-v"); 454 addargs(&remote_remote_args, "-v"); 455 verbose_mode = 1; 456 break; 457 case 'q': 458 addargs(&args, "-q"); 459 addargs(&remote_remote_args, "-q"); 460 showprogress = 0; 461 break; 462 463 /* Server options. */ 464 case 'd': 465 targetshouldbedirectory = 1; 466 break; 467 case 'f': /* "from" */ 468 iamremote = 1; 469 fflag = 1; 470 break; 471 case 't': /* "to" */ 472 iamremote = 1; 473 tflag = 1; 474 #ifdef HAVE_CYGWIN 475 setmode(0, O_BINARY); 476 #endif 477 break; 478 default: 479 usage(); 480 } 481 argc -= optind; 482 argv += optind; 483 484 if ((pwd = getpwuid(userid = getuid())) == NULL) 485 fatal("unknown user %u", (u_int) userid); 486 487 if (!isatty(STDOUT_FILENO)) 488 showprogress = 0; 489 490 if (pflag) { 491 /* Cannot pledge: -p allows setuid/setgid files... */ 492 } else { 493 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 494 NULL) == -1) { 495 perror("pledge"); 496 exit(1); 497 } 498 } 499 500 remin = STDIN_FILENO; 501 remout = STDOUT_FILENO; 502 503 if (fflag) { 504 /* Follow "protocol", send data. */ 505 (void) response(); 506 source(argc, argv); 507 exit(errs != 0); 508 } 509 if (tflag) { 510 /* Receive data. */ 511 sink(argc, argv); 512 exit(errs != 0); 513 } 514 if (argc < 2) 515 usage(); 516 if (argc > 2) 517 targetshouldbedirectory = 1; 518 519 remin = remout = -1; 520 do_cmd_pid = -1; 521 /* Command to be executed on remote system using "ssh". */ 522 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 523 verbose_mode ? " -v" : "", 524 iamrecursive ? " -r" : "", pflag ? " -p" : "", 525 targetshouldbedirectory ? " -d" : ""); 526 527 (void) signal(SIGPIPE, lostconn); 528 529 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 530 toremote(targ, argc, argv); 531 else { 532 if (targetshouldbedirectory) 533 verifydir(argv[argc - 1]); 534 tolocal(argc, argv); /* Dest is local host. */ 535 } 536 /* 537 * Finally check the exit status of the ssh process, if one was forked 538 * and no error has occurred yet 539 */ 540 if (do_cmd_pid != -1 && errs == 0) { 541 if (remin != -1) 542 (void) close(remin); 543 if (remout != -1) 544 (void) close(remout); 545 if (waitpid(do_cmd_pid, &status, 0) == -1) 546 errs = 1; 547 else { 548 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 549 errs = 1; 550 } 551 } 552 exit(errs != 0); 553 } 554 555 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 556 static int 557 scpio(void *_cnt, size_t s) 558 { 559 off_t *cnt = (off_t *)_cnt; 560 561 *cnt += s; 562 if (limit_kbps > 0) 563 bandwidth_limit(&bwlimit, s); 564 return 0; 565 } 566 567 static int 568 do_times(int fd, int verb, const struct stat *sb) 569 { 570 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 571 char buf[(20 + 7 + 2) * 2 + 2]; 572 573 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 574 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 575 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 576 if (verb) { 577 fprintf(stderr, "File mtime %lld atime %lld\n", 578 (long long)sb->st_mtime, (long long)sb->st_atime); 579 fprintf(stderr, "Sending file timestamps: %s", buf); 580 } 581 (void) atomicio(vwrite, fd, buf, strlen(buf)); 582 return (response()); 583 } 584 585 void 586 toremote(char *targ, int argc, char **argv) 587 { 588 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 589 arglist alist; 590 int i; 591 u_int j; 592 593 memset(&alist, '\0', sizeof(alist)); 594 alist.list = NULL; 595 596 *targ++ = 0; 597 if (*targ == 0) 598 targ = "."; 599 600 arg = xstrdup(argv[argc - 1]); 601 if ((thost = strrchr(arg, '@'))) { 602 /* user@host */ 603 *thost++ = 0; 604 tuser = arg; 605 if (*tuser == '\0') 606 tuser = NULL; 607 } else { 608 thost = arg; 609 tuser = NULL; 610 } 611 612 if (tuser != NULL && !okname(tuser)) { 613 free(arg); 614 return; 615 } 616 617 for (i = 0; i < argc - 1; i++) { 618 src = colon(argv[i]); 619 if (src && throughlocal) { /* extended remote to remote */ 620 *src++ = 0; 621 if (*src == 0) 622 src = "."; 623 host = strrchr(argv[i], '@'); 624 if (host) { 625 *host++ = 0; 626 host = cleanhostname(host); 627 suser = argv[i]; 628 if (*suser == '\0') 629 suser = pwd->pw_name; 630 else if (!okname(suser)) 631 continue; 632 } else { 633 host = cleanhostname(argv[i]); 634 suser = NULL; 635 } 636 xasprintf(&bp, "%s -f %s%s", cmd, 637 *src == '-' ? "-- " : "", src); 638 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 639 exit(1); 640 free(bp); 641 host = cleanhostname(thost); 642 xasprintf(&bp, "%s -t %s%s", cmd, 643 *targ == '-' ? "-- " : "", targ); 644 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 645 exit(1); 646 free(bp); 647 (void) close(remin); 648 (void) close(remout); 649 remin = remout = -1; 650 } else if (src) { /* standard remote to remote */ 651 freeargs(&alist); 652 addargs(&alist, "%s", ssh_program); 653 addargs(&alist, "-x"); 654 addargs(&alist, "-oClearAllForwardings=yes"); 655 addargs(&alist, "-n"); 656 for (j = 0; j < remote_remote_args.num; j++) { 657 addargs(&alist, "%s", 658 remote_remote_args.list[j]); 659 } 660 *src++ = 0; 661 if (*src == 0) 662 src = "."; 663 host = strrchr(argv[i], '@'); 664 665 if (host) { 666 *host++ = 0; 667 host = cleanhostname(host); 668 suser = argv[i]; 669 if (*suser == '\0') 670 suser = pwd->pw_name; 671 else if (!okname(suser)) 672 continue; 673 addargs(&alist, "-l"); 674 addargs(&alist, "%s", suser); 675 } else { 676 host = cleanhostname(argv[i]); 677 } 678 addargs(&alist, "--"); 679 addargs(&alist, "%s", host); 680 addargs(&alist, "%s", cmd); 681 addargs(&alist, "%s", src); 682 addargs(&alist, "%s%s%s:%s", 683 tuser ? tuser : "", tuser ? "@" : "", 684 thost, targ); 685 if (do_local_cmd(&alist) != 0) 686 errs = 1; 687 } else { /* local to remote */ 688 if (remin == -1) { 689 xasprintf(&bp, "%s -t %s%s", cmd, 690 *targ == '-' ? "-- " : "", targ); 691 host = cleanhostname(thost); 692 if (do_cmd(host, tuser, bp, &remin, 693 &remout) < 0) 694 exit(1); 695 if (response() < 0) 696 exit(1); 697 free(bp); 698 } 699 source(1, argv + i); 700 } 701 } 702 free(arg); 703 } 704 705 void 706 tolocal(int argc, char **argv) 707 { 708 char *bp, *host, *src, *suser; 709 arglist alist; 710 int i; 711 712 memset(&alist, '\0', sizeof(alist)); 713 alist.list = NULL; 714 715 for (i = 0; i < argc - 1; i++) { 716 if (!(src = colon(argv[i]))) { /* Local to local. */ 717 freeargs(&alist); 718 addargs(&alist, "%s", _PATH_CP); 719 if (iamrecursive) 720 addargs(&alist, "-r"); 721 if (pflag) 722 addargs(&alist, "-p"); 723 addargs(&alist, "--"); 724 addargs(&alist, "%s", argv[i]); 725 addargs(&alist, "%s", argv[argc-1]); 726 if (do_local_cmd(&alist)) 727 ++errs; 728 continue; 729 } 730 *src++ = 0; 731 if (*src == 0) 732 src = "."; 733 if ((host = strrchr(argv[i], '@')) == NULL) { 734 host = argv[i]; 735 suser = NULL; 736 } else { 737 *host++ = 0; 738 suser = argv[i]; 739 if (*suser == '\0') 740 suser = pwd->pw_name; 741 } 742 host = cleanhostname(host); 743 xasprintf(&bp, "%s -f %s%s", 744 cmd, *src == '-' ? "-- " : "", src); 745 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 746 free(bp); 747 ++errs; 748 continue; 749 } 750 free(bp); 751 sink(1, argv + argc - 1); 752 (void) close(remin); 753 remin = remout = -1; 754 } 755 } 756 757 void 758 source(int argc, char **argv) 759 { 760 struct stat stb; 761 static BUF buffer; 762 BUF *bp; 763 off_t i, statbytes; 764 size_t amt, nr; 765 int fd = -1, haderr, indx; 766 char *last, *name, buf[2048], encname[PATH_MAX]; 767 int len; 768 769 for (indx = 0; indx < argc; ++indx) { 770 name = argv[indx]; 771 statbytes = 0; 772 len = strlen(name); 773 while (len > 1 && name[len-1] == '/') 774 name[--len] = '\0'; 775 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 776 goto syserr; 777 if (strchr(name, '\n') != NULL) { 778 strnvis(encname, name, sizeof(encname), VIS_NL); 779 name = encname; 780 } 781 if (fstat(fd, &stb) < 0) { 782 syserr: run_err("%s: %s", name, strerror(errno)); 783 goto next; 784 } 785 if (stb.st_size < 0) { 786 run_err("%s: %s", name, "Negative file size"); 787 goto next; 788 } 789 unset_nonblock(fd); 790 switch (stb.st_mode & S_IFMT) { 791 case S_IFREG: 792 break; 793 case S_IFDIR: 794 if (iamrecursive) { 795 rsource(name, &stb); 796 goto next; 797 } 798 /* FALLTHROUGH */ 799 default: 800 run_err("%s: not a regular file", name); 801 goto next; 802 } 803 if ((last = strrchr(name, '/')) == NULL) 804 last = name; 805 else 806 ++last; 807 curfile = last; 808 if (pflag) { 809 if (do_times(remout, verbose_mode, &stb) < 0) 810 goto next; 811 } 812 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 813 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 814 (u_int) (stb.st_mode & FILEMODEMASK), 815 (long long)stb.st_size, last); 816 if (verbose_mode) 817 fmprintf(stderr, "Sending file modes: %s", buf); 818 (void) atomicio(vwrite, remout, buf, strlen(buf)); 819 if (response() < 0) 820 goto next; 821 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 822 next: if (fd != -1) { 823 (void) close(fd); 824 fd = -1; 825 } 826 continue; 827 } 828 if (showprogress) 829 start_progress_meter(curfile, stb.st_size, &statbytes); 830 set_nonblock(remout); 831 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 832 amt = bp->cnt; 833 if (i + (off_t)amt > stb.st_size) 834 amt = stb.st_size - i; 835 if (!haderr) { 836 if ((nr = atomicio(read, fd, 837 bp->buf, amt)) != amt) { 838 haderr = errno; 839 memset(bp->buf + nr, 0, amt - nr); 840 } 841 } 842 /* Keep writing after error to retain sync */ 843 if (haderr) { 844 (void)atomicio(vwrite, remout, bp->buf, amt); 845 memset(bp->buf, 0, amt); 846 continue; 847 } 848 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 849 &statbytes) != amt) 850 haderr = errno; 851 } 852 unset_nonblock(remout); 853 854 if (fd != -1) { 855 if (close(fd) < 0 && !haderr) 856 haderr = errno; 857 fd = -1; 858 } 859 if (!haderr) 860 (void) atomicio(vwrite, remout, "", 1); 861 else 862 run_err("%s: %s", name, strerror(haderr)); 863 (void) response(); 864 if (showprogress) 865 stop_progress_meter(); 866 } 867 } 868 869 void 870 rsource(char *name, struct stat *statp) 871 { 872 DIR *dirp; 873 struct dirent *dp; 874 char *last, *vect[1], path[PATH_MAX]; 875 876 if (!(dirp = opendir(name))) { 877 run_err("%s: %s", name, strerror(errno)); 878 return; 879 } 880 last = strrchr(name, '/'); 881 if (last == NULL) 882 last = name; 883 else 884 last++; 885 if (pflag) { 886 if (do_times(remout, verbose_mode, statp) < 0) { 887 closedir(dirp); 888 return; 889 } 890 } 891 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 892 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 893 if (verbose_mode) 894 fmprintf(stderr, "Entering directory: %s", path); 895 (void) atomicio(vwrite, remout, path, strlen(path)); 896 if (response() < 0) { 897 closedir(dirp); 898 return; 899 } 900 while ((dp = readdir(dirp)) != NULL) { 901 if (dp->d_ino == 0) 902 continue; 903 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 904 continue; 905 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 906 run_err("%s/%s: name too long", name, dp->d_name); 907 continue; 908 } 909 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 910 vect[0] = path; 911 source(1, vect); 912 } 913 (void) closedir(dirp); 914 (void) atomicio(vwrite, remout, "E\n", 2); 915 (void) response(); 916 } 917 918 void 919 sink(int argc, char **argv) 920 { 921 static BUF buffer; 922 struct stat stb; 923 enum { 924 YES, NO, DISPLAYED 925 } wrerr; 926 BUF *bp; 927 off_t i; 928 size_t j, count; 929 int amt, exists, first, ofd; 930 mode_t mode, omode, mask; 931 off_t size, statbytes; 932 unsigned long long ull; 933 int setimes, targisdir, wrerrno = 0; 934 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 935 struct timeval tv[2]; 936 937 #define atime tv[0] 938 #define mtime tv[1] 939 #define SCREWUP(str) { why = str; goto screwup; } 940 941 setimes = targisdir = 0; 942 mask = umask(0); 943 if (!pflag) 944 (void) umask(mask); 945 if (argc != 1) { 946 run_err("ambiguous target"); 947 exit(1); 948 } 949 targ = *argv; 950 if (targetshouldbedirectory) 951 verifydir(targ); 952 953 (void) atomicio(vwrite, remout, "", 1); 954 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 955 targisdir = 1; 956 for (first = 1;; first = 0) { 957 cp = buf; 958 if (atomicio(read, remin, cp, 1) != 1) 959 return; 960 if (*cp++ == '\n') 961 SCREWUP("unexpected <newline>"); 962 do { 963 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 964 SCREWUP("lost connection"); 965 *cp++ = ch; 966 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 967 *cp = 0; 968 if (verbose_mode) 969 fmprintf(stderr, "Sink: %s", buf); 970 971 if (buf[0] == '\01' || buf[0] == '\02') { 972 if (iamremote == 0) { 973 (void) snmprintf(visbuf, sizeof(visbuf), 974 NULL, "%s", buf + 1); 975 (void) atomicio(vwrite, STDERR_FILENO, 976 visbuf, strlen(visbuf)); 977 } 978 if (buf[0] == '\02') 979 exit(1); 980 ++errs; 981 continue; 982 } 983 if (buf[0] == 'E') { 984 (void) atomicio(vwrite, remout, "", 1); 985 return; 986 } 987 if (ch == '\n') 988 *--cp = 0; 989 990 cp = buf; 991 if (*cp == 'T') { 992 setimes++; 993 cp++; 994 if (!isdigit((unsigned char)*cp)) 995 SCREWUP("mtime.sec not present"); 996 ull = strtoull(cp, &cp, 10); 997 if (!cp || *cp++ != ' ') 998 SCREWUP("mtime.sec not delimited"); 999 if ((time_t)ull < 0 || 1000 (unsigned long long)(time_t)ull != ull) 1001 setimes = 0; /* out of range */ 1002 mtime.tv_sec = ull; 1003 mtime.tv_usec = strtol(cp, &cp, 10); 1004 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1005 mtime.tv_usec > 999999) 1006 SCREWUP("mtime.usec not delimited"); 1007 if (!isdigit((unsigned char)*cp)) 1008 SCREWUP("atime.sec not present"); 1009 ull = strtoull(cp, &cp, 10); 1010 if (!cp || *cp++ != ' ') 1011 SCREWUP("atime.sec not delimited"); 1012 if ((time_t)ull < 0 || 1013 (unsigned long long)(time_t)ull != ull) 1014 setimes = 0; /* out of range */ 1015 atime.tv_sec = ull; 1016 atime.tv_usec = strtol(cp, &cp, 10); 1017 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1018 atime.tv_usec > 999999) 1019 SCREWUP("atime.usec not delimited"); 1020 (void) atomicio(vwrite, remout, "", 1); 1021 continue; 1022 } 1023 if (*cp != 'C' && *cp != 'D') { 1024 /* 1025 * Check for the case "rcp remote:foo\* local:bar". 1026 * In this case, the line "No match." can be returned 1027 * by the shell before the rcp command on the remote is 1028 * executed so the ^Aerror_message convention isn't 1029 * followed. 1030 */ 1031 if (first) { 1032 run_err("%s", cp); 1033 exit(1); 1034 } 1035 SCREWUP("expected control record"); 1036 } 1037 mode = 0; 1038 for (++cp; cp < buf + 5; cp++) { 1039 if (*cp < '0' || *cp > '7') 1040 SCREWUP("bad mode"); 1041 mode = (mode << 3) | (*cp - '0'); 1042 } 1043 if (*cp++ != ' ') 1044 SCREWUP("mode not delimited"); 1045 1046 for (size = 0; isdigit((unsigned char)*cp);) 1047 size = size * 10 + (*cp++ - '0'); 1048 if (*cp++ != ' ') 1049 SCREWUP("size not delimited"); 1050 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1051 run_err("error: unexpected filename: %s", cp); 1052 exit(1); 1053 } 1054 if (targisdir) { 1055 static char *namebuf; 1056 static size_t cursize; 1057 size_t need; 1058 1059 need = strlen(targ) + strlen(cp) + 250; 1060 if (need > cursize) { 1061 free(namebuf); 1062 namebuf = xmalloc(need); 1063 cursize = need; 1064 } 1065 (void) snprintf(namebuf, need, "%s%s%s", targ, 1066 strcmp(targ, "/") ? "/" : "", cp); 1067 np = namebuf; 1068 } else 1069 np = targ; 1070 curfile = cp; 1071 exists = stat(np, &stb) == 0; 1072 if (buf[0] == 'D') { 1073 int mod_flag = pflag; 1074 if (!iamrecursive) 1075 SCREWUP("received directory without -r"); 1076 if (exists) { 1077 if (!S_ISDIR(stb.st_mode)) { 1078 errno = ENOTDIR; 1079 goto bad; 1080 } 1081 if (pflag) 1082 (void) chmod(np, mode); 1083 } else { 1084 /* Handle copying from a read-only 1085 directory */ 1086 mod_flag = 1; 1087 if (mkdir(np, mode | S_IRWXU) < 0) 1088 goto bad; 1089 } 1090 vect[0] = xstrdup(np); 1091 sink(1, vect); 1092 if (setimes) { 1093 setimes = 0; 1094 if (utimes(vect[0], tv) < 0) 1095 run_err("%s: set times: %s", 1096 vect[0], strerror(errno)); 1097 } 1098 if (mod_flag) 1099 (void) chmod(vect[0], mode); 1100 free(vect[0]); 1101 continue; 1102 } 1103 omode = mode; 1104 mode |= S_IWUSR; 1105 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1106 bad: run_err("%s: %s", np, strerror(errno)); 1107 continue; 1108 } 1109 (void) atomicio(vwrite, remout, "", 1); 1110 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1111 (void) close(ofd); 1112 continue; 1113 } 1114 cp = bp->buf; 1115 wrerr = NO; 1116 1117 statbytes = 0; 1118 if (showprogress) 1119 start_progress_meter(curfile, size, &statbytes); 1120 set_nonblock(remin); 1121 for (count = i = 0; i < size; i += bp->cnt) { 1122 amt = bp->cnt; 1123 if (i + amt > size) 1124 amt = size - i; 1125 count += amt; 1126 do { 1127 j = atomicio6(read, remin, cp, amt, 1128 scpio, &statbytes); 1129 if (j == 0) { 1130 run_err("%s", j != EPIPE ? 1131 strerror(errno) : 1132 "dropped connection"); 1133 exit(1); 1134 } 1135 amt -= j; 1136 cp += j; 1137 } while (amt > 0); 1138 1139 if (count == bp->cnt) { 1140 /* Keep reading so we stay sync'd up. */ 1141 if (wrerr == NO) { 1142 if (atomicio(vwrite, ofd, bp->buf, 1143 count) != count) { 1144 wrerr = YES; 1145 wrerrno = errno; 1146 } 1147 } 1148 count = 0; 1149 cp = bp->buf; 1150 } 1151 } 1152 unset_nonblock(remin); 1153 if (count != 0 && wrerr == NO && 1154 atomicio(vwrite, ofd, bp->buf, count) != count) { 1155 wrerr = YES; 1156 wrerrno = errno; 1157 } 1158 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1159 ftruncate(ofd, size) != 0) { 1160 run_err("%s: truncate: %s", np, strerror(errno)); 1161 wrerr = DISPLAYED; 1162 } 1163 if (pflag) { 1164 if (exists || omode != mode) 1165 #ifdef HAVE_FCHMOD 1166 if (fchmod(ofd, omode)) { 1167 #else /* HAVE_FCHMOD */ 1168 if (chmod(np, omode)) { 1169 #endif /* HAVE_FCHMOD */ 1170 run_err("%s: set mode: %s", 1171 np, strerror(errno)); 1172 wrerr = DISPLAYED; 1173 } 1174 } else { 1175 if (!exists && omode != mode) 1176 #ifdef HAVE_FCHMOD 1177 if (fchmod(ofd, omode & ~mask)) { 1178 #else /* HAVE_FCHMOD */ 1179 if (chmod(np, omode & ~mask)) { 1180 #endif /* HAVE_FCHMOD */ 1181 run_err("%s: set mode: %s", 1182 np, strerror(errno)); 1183 wrerr = DISPLAYED; 1184 } 1185 } 1186 if (close(ofd) == -1) { 1187 wrerr = YES; 1188 wrerrno = errno; 1189 } 1190 (void) response(); 1191 if (showprogress) 1192 stop_progress_meter(); 1193 if (setimes && wrerr == NO) { 1194 setimes = 0; 1195 if (utimes(np, tv) < 0) { 1196 run_err("%s: set times: %s", 1197 np, strerror(errno)); 1198 wrerr = DISPLAYED; 1199 } 1200 } 1201 switch (wrerr) { 1202 case YES: 1203 run_err("%s: %s", np, strerror(wrerrno)); 1204 break; 1205 case NO: 1206 (void) atomicio(vwrite, remout, "", 1); 1207 break; 1208 case DISPLAYED: 1209 break; 1210 } 1211 } 1212 screwup: 1213 run_err("protocol error: %s", why); 1214 exit(1); 1215 } 1216 1217 int 1218 response(void) 1219 { 1220 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1221 1222 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1223 lostconn(0); 1224 1225 cp = rbuf; 1226 switch (resp) { 1227 case 0: /* ok */ 1228 return (0); 1229 default: 1230 *cp++ = resp; 1231 /* FALLTHROUGH */ 1232 case 1: /* error, followed by error msg */ 1233 case 2: /* fatal error, "" */ 1234 do { 1235 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1236 lostconn(0); 1237 *cp++ = ch; 1238 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1239 1240 if (!iamremote) { 1241 cp[-1] = '\0'; 1242 (void) snmprintf(visbuf, sizeof(visbuf), 1243 NULL, "%s\n", rbuf); 1244 (void) atomicio(vwrite, STDERR_FILENO, 1245 visbuf, strlen(visbuf)); 1246 } 1247 ++errs; 1248 if (resp == 1) 1249 return (-1); 1250 exit(1); 1251 } 1252 /* NOTREACHED */ 1253 } 1254 1255 void 1256 usage(void) 1257 { 1258 (void) fprintf(stderr, 1259 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1260 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1261 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1262 exit(1); 1263 } 1264 1265 void 1266 run_err(const char *fmt,...) 1267 { 1268 static FILE *fp; 1269 va_list ap; 1270 1271 ++errs; 1272 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1273 (void) fprintf(fp, "%c", 0x01); 1274 (void) fprintf(fp, "scp: "); 1275 va_start(ap, fmt); 1276 (void) vfprintf(fp, fmt, ap); 1277 va_end(ap); 1278 (void) fprintf(fp, "\n"); 1279 (void) fflush(fp); 1280 } 1281 1282 if (!iamremote) { 1283 va_start(ap, fmt); 1284 vfmprintf(stderr, fmt, ap); 1285 va_end(ap); 1286 fprintf(stderr, "\n"); 1287 } 1288 } 1289 1290 void 1291 verifydir(char *cp) 1292 { 1293 struct stat stb; 1294 1295 if (!stat(cp, &stb)) { 1296 if (S_ISDIR(stb.st_mode)) 1297 return; 1298 errno = ENOTDIR; 1299 } 1300 run_err("%s: %s", cp, strerror(errno)); 1301 killchild(0); 1302 } 1303 1304 int 1305 okname(char *cp0) 1306 { 1307 int c; 1308 char *cp; 1309 1310 cp = cp0; 1311 do { 1312 c = (int)*cp; 1313 if (c & 0200) 1314 goto bad; 1315 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1316 switch (c) { 1317 case '\'': 1318 case '"': 1319 case '`': 1320 case ' ': 1321 case '#': 1322 goto bad; 1323 default: 1324 break; 1325 } 1326 } 1327 } while (*++cp); 1328 return (1); 1329 1330 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1331 return (0); 1332 } 1333 1334 BUF * 1335 allocbuf(BUF *bp, int fd, int blksize) 1336 { 1337 size_t size; 1338 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1339 struct stat stb; 1340 1341 if (fstat(fd, &stb) < 0) { 1342 run_err("fstat: %s", strerror(errno)); 1343 return (0); 1344 } 1345 size = ROUNDUP(stb.st_blksize, blksize); 1346 if (size == 0) 1347 size = blksize; 1348 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1349 size = blksize; 1350 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1351 if (bp->cnt >= size) 1352 return (bp); 1353 if (bp->buf == NULL) 1354 bp->buf = xmalloc(size); 1355 else 1356 bp->buf = xreallocarray(bp->buf, 1, size); 1357 memset(bp->buf, 0, size); 1358 bp->cnt = size; 1359 return (bp); 1360 } 1361 1362 void 1363 lostconn(int signo) 1364 { 1365 if (!iamremote) 1366 (void)write(STDERR_FILENO, "lost connection\n", 16); 1367 if (signo) 1368 _exit(1); 1369 else 1370 exit(1); 1371 } 1372