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 "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 #ifdef HAVE_STDINT_H 103 #include <stdint.h> 104 #endif 105 #include <stdio.h> 106 #include <stdlib.h> 107 #include <string.h> 108 #include <time.h> 109 #include <unistd.h> 110 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) 111 #include <vis.h> 112 #endif 113 114 #include "xmalloc.h" 115 #include "atomicio.h" 116 #include "pathnames.h" 117 #include "log.h" 118 #include "misc.h" 119 #include "progressmeter.h" 120 #include "utf8.h" 121 122 extern char *__progname; 123 124 #define COPY_BUFLEN 16384 125 126 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 127 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 128 129 /* Struct for addargs */ 130 arglist args; 131 arglist remote_remote_args; 132 133 /* Bandwidth limit */ 134 long long limit_kbps = 0; 135 struct bwlimit bwlimit; 136 137 /* Name of current file being transferred. */ 138 char *curfile; 139 140 /* This is set to non-zero to enable verbose mode. */ 141 int verbose_mode = 0; 142 143 /* This is set to zero if the progressmeter is not desired. */ 144 int showprogress = 1; 145 146 /* 147 * This is set to non-zero if remote-remote copy should be piped 148 * through this process. 149 */ 150 int throughlocal = 0; 151 152 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 153 char *ssh_program = _PATH_SSH_PROGRAM; 154 155 /* This is used to store the pid of ssh_program */ 156 pid_t do_cmd_pid = -1; 157 158 static void 159 killchild(int signo) 160 { 161 if (do_cmd_pid > 1) { 162 kill(do_cmd_pid, signo ? signo : SIGTERM); 163 waitpid(do_cmd_pid, NULL, 0); 164 } 165 166 if (signo) 167 _exit(1); 168 exit(1); 169 } 170 171 static void 172 suspchild(int signo) 173 { 174 int status; 175 176 if (do_cmd_pid > 1) { 177 kill(do_cmd_pid, signo); 178 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 179 errno == EINTR) 180 ; 181 kill(getpid(), SIGSTOP); 182 } 183 } 184 185 static int 186 do_local_cmd(arglist *a) 187 { 188 u_int i; 189 int status; 190 pid_t pid; 191 192 if (a->num == 0) 193 fatal("do_local_cmd: no arguments"); 194 195 if (verbose_mode) { 196 fprintf(stderr, "Executing:"); 197 for (i = 0; i < a->num; i++) 198 fmprintf(stderr, " %s", a->list[i]); 199 fprintf(stderr, "\n"); 200 } 201 if ((pid = fork()) == -1) 202 fatal("do_local_cmd: fork: %s", strerror(errno)); 203 204 if (pid == 0) { 205 execvp(a->list[0], a->list); 206 perror(a->list[0]); 207 exit(1); 208 } 209 210 do_cmd_pid = pid; 211 signal(SIGTERM, killchild); 212 signal(SIGINT, killchild); 213 signal(SIGHUP, killchild); 214 215 while (waitpid(pid, &status, 0) == -1) 216 if (errno != EINTR) 217 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 218 219 do_cmd_pid = -1; 220 221 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 222 return (-1); 223 224 return (0); 225 } 226 227 /* 228 * This function executes the given command as the specified user on the 229 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 230 * assigns the input and output file descriptors on success. 231 */ 232 233 int 234 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 235 { 236 int pin[2], pout[2], reserved[2]; 237 238 if (verbose_mode) 239 fmprintf(stderr, 240 "Executing: program %s host %s, user %s, command %s\n", 241 ssh_program, host, 242 remuser ? remuser : "(unspecified)", cmd); 243 244 /* 245 * Reserve two descriptors so that the real pipes won't get 246 * descriptors 0 and 1 because that will screw up dup2 below. 247 */ 248 if (pipe(reserved) < 0) 249 fatal("pipe: %s", strerror(errno)); 250 251 /* Create a socket pair for communicating with ssh. */ 252 if (pipe(pin) < 0) 253 fatal("pipe: %s", strerror(errno)); 254 if (pipe(pout) < 0) 255 fatal("pipe: %s", strerror(errno)); 256 257 /* Free the reserved descriptors. */ 258 close(reserved[0]); 259 close(reserved[1]); 260 261 signal(SIGTSTP, suspchild); 262 signal(SIGTTIN, suspchild); 263 signal(SIGTTOU, suspchild); 264 265 /* Fork a child to execute the command on the remote host using ssh. */ 266 do_cmd_pid = fork(); 267 if (do_cmd_pid == 0) { 268 /* Child. */ 269 close(pin[1]); 270 close(pout[0]); 271 dup2(pin[0], 0); 272 dup2(pout[1], 1); 273 close(pin[0]); 274 close(pout[1]); 275 276 replacearg(&args, 0, "%s", ssh_program); 277 if (remuser != NULL) { 278 addargs(&args, "-l"); 279 addargs(&args, "%s", remuser); 280 } 281 addargs(&args, "--"); 282 addargs(&args, "%s", host); 283 addargs(&args, "%s", cmd); 284 285 execvp(ssh_program, args.list); 286 perror(ssh_program); 287 exit(1); 288 } else if (do_cmd_pid == -1) { 289 fatal("fork: %s", strerror(errno)); 290 } 291 /* Parent. Close the other side, and return the local side. */ 292 close(pin[0]); 293 *fdout = pin[1]; 294 close(pout[1]); 295 *fdin = pout[0]; 296 signal(SIGTERM, killchild); 297 signal(SIGINT, killchild); 298 signal(SIGHUP, killchild); 299 return 0; 300 } 301 302 /* 303 * This functions executes a command simlar to do_cmd(), but expects the 304 * input and output descriptors to be setup by a previous call to do_cmd(). 305 * This way the input and output of two commands can be connected. 306 */ 307 int 308 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 309 { 310 pid_t pid; 311 int status; 312 313 if (verbose_mode) 314 fmprintf(stderr, 315 "Executing: 2nd program %s host %s, user %s, command %s\n", 316 ssh_program, host, 317 remuser ? remuser : "(unspecified)", cmd); 318 319 /* Fork a child to execute the command on the remote host using ssh. */ 320 pid = fork(); 321 if (pid == 0) { 322 dup2(fdin, 0); 323 dup2(fdout, 1); 324 325 replacearg(&args, 0, "%s", ssh_program); 326 if (remuser != NULL) { 327 addargs(&args, "-l"); 328 addargs(&args, "%s", remuser); 329 } 330 addargs(&args, "--"); 331 addargs(&args, "%s", host); 332 addargs(&args, "%s", cmd); 333 334 execvp(ssh_program, args.list); 335 perror(ssh_program); 336 exit(1); 337 } else if (pid == -1) { 338 fatal("fork: %s", strerror(errno)); 339 } 340 while (waitpid(pid, &status, 0) == -1) 341 if (errno != EINTR) 342 fatal("do_cmd2: waitpid: %s", strerror(errno)); 343 return 0; 344 } 345 346 typedef struct { 347 size_t cnt; 348 char *buf; 349 } BUF; 350 351 BUF *allocbuf(BUF *, int, int); 352 void lostconn(int); 353 int okname(char *); 354 void run_err(const char *,...); 355 void verifydir(char *); 356 357 struct passwd *pwd; 358 uid_t userid; 359 int errs, remin, remout; 360 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 361 362 #define CMDNEEDS 64 363 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 364 365 int response(void); 366 void rsource(char *, struct stat *); 367 void sink(int, char *[]); 368 void source(int, char *[]); 369 void tolocal(int, char *[]); 370 void toremote(char *, int, char *[]); 371 void usage(void); 372 373 int 374 main(int argc, char **argv) 375 { 376 int ch, fflag, tflag, status, n; 377 char *targ, **newargv; 378 const char *errstr; 379 extern char *optarg; 380 extern int optind; 381 382 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 383 sanitise_stdfd(); 384 385 msetlocale(); 386 387 /* Copy argv, because we modify it */ 388 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 389 for (n = 0; n < argc; n++) 390 newargv[n] = xstrdup(argv[n]); 391 argv = newargv; 392 393 __progname = ssh_get_progname(argv[0]); 394 395 memset(&args, '\0', sizeof(args)); 396 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 397 args.list = remote_remote_args.list = NULL; 398 addargs(&args, "%s", ssh_program); 399 addargs(&args, "-x"); 400 addargs(&args, "-oForwardAgent=no"); 401 addargs(&args, "-oPermitLocalCommand=no"); 402 addargs(&args, "-oClearAllForwardings=yes"); 403 404 fflag = tflag = 0; 405 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 406 switch (ch) { 407 /* User-visible flags. */ 408 case '1': 409 fatal("SSH protocol v.1 is no longer supported"); 410 break; 411 case '2': 412 /* Ignored */ 413 break; 414 case '4': 415 case '6': 416 case 'C': 417 addargs(&args, "-%c", ch); 418 addargs(&remote_remote_args, "-%c", ch); 419 break; 420 case '3': 421 throughlocal = 1; 422 break; 423 case 'o': 424 case 'c': 425 case 'i': 426 case 'F': 427 addargs(&remote_remote_args, "-%c", ch); 428 addargs(&remote_remote_args, "%s", optarg); 429 addargs(&args, "-%c", ch); 430 addargs(&args, "%s", optarg); 431 break; 432 case 'P': 433 addargs(&remote_remote_args, "-p"); 434 addargs(&remote_remote_args, "%s", optarg); 435 addargs(&args, "-p"); 436 addargs(&args, "%s", optarg); 437 break; 438 case 'B': 439 addargs(&remote_remote_args, "-oBatchmode=yes"); 440 addargs(&args, "-oBatchmode=yes"); 441 break; 442 case 'l': 443 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 444 &errstr); 445 if (errstr != NULL) 446 usage(); 447 limit_kbps *= 1024; /* kbps */ 448 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 449 break; 450 case 'p': 451 pflag = 1; 452 break; 453 case 'r': 454 iamrecursive = 1; 455 break; 456 case 'S': 457 ssh_program = xstrdup(optarg); 458 break; 459 case 'v': 460 addargs(&args, "-v"); 461 addargs(&remote_remote_args, "-v"); 462 verbose_mode = 1; 463 break; 464 case 'q': 465 addargs(&args, "-q"); 466 addargs(&remote_remote_args, "-q"); 467 showprogress = 0; 468 break; 469 470 /* Server options. */ 471 case 'd': 472 targetshouldbedirectory = 1; 473 break; 474 case 'f': /* "from" */ 475 iamremote = 1; 476 fflag = 1; 477 break; 478 case 't': /* "to" */ 479 iamremote = 1; 480 tflag = 1; 481 #ifdef HAVE_CYGWIN 482 setmode(0, O_BINARY); 483 #endif 484 break; 485 default: 486 usage(); 487 } 488 argc -= optind; 489 argv += optind; 490 491 if ((pwd = getpwuid(userid = getuid())) == NULL) 492 fatal("unknown user %u", (u_int) userid); 493 494 if (!isatty(STDOUT_FILENO)) 495 showprogress = 0; 496 497 if (pflag) { 498 /* Cannot pledge: -p allows setuid/setgid files... */ 499 } else { 500 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 501 NULL) == -1) { 502 perror("pledge"); 503 exit(1); 504 } 505 } 506 507 remin = STDIN_FILENO; 508 remout = STDOUT_FILENO; 509 510 if (fflag) { 511 /* Follow "protocol", send data. */ 512 (void) response(); 513 source(argc, argv); 514 exit(errs != 0); 515 } 516 if (tflag) { 517 /* Receive data. */ 518 sink(argc, argv); 519 exit(errs != 0); 520 } 521 if (argc < 2) 522 usage(); 523 if (argc > 2) 524 targetshouldbedirectory = 1; 525 526 remin = remout = -1; 527 do_cmd_pid = -1; 528 /* Command to be executed on remote system using "ssh". */ 529 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 530 verbose_mode ? " -v" : "", 531 iamrecursive ? " -r" : "", pflag ? " -p" : "", 532 targetshouldbedirectory ? " -d" : ""); 533 534 (void) signal(SIGPIPE, lostconn); 535 536 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 537 toremote(targ, argc, argv); 538 else { 539 if (targetshouldbedirectory) 540 verifydir(argv[argc - 1]); 541 tolocal(argc, argv); /* Dest is local host. */ 542 } 543 /* 544 * Finally check the exit status of the ssh process, if one was forked 545 * and no error has occurred yet 546 */ 547 if (do_cmd_pid != -1 && errs == 0) { 548 if (remin != -1) 549 (void) close(remin); 550 if (remout != -1) 551 (void) close(remout); 552 if (waitpid(do_cmd_pid, &status, 0) == -1) 553 errs = 1; 554 else { 555 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 556 errs = 1; 557 } 558 } 559 exit(errs != 0); 560 } 561 562 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 563 static int 564 scpio(void *_cnt, size_t s) 565 { 566 off_t *cnt = (off_t *)_cnt; 567 568 *cnt += s; 569 if (limit_kbps > 0) 570 bandwidth_limit(&bwlimit, s); 571 return 0; 572 } 573 574 static int 575 do_times(int fd, int verb, const struct stat *sb) 576 { 577 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 578 char buf[(20 + 7 + 2) * 2 + 2]; 579 580 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 581 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 582 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 583 if (verb) { 584 fprintf(stderr, "File mtime %lld atime %lld\n", 585 (long long)sb->st_mtime, (long long)sb->st_atime); 586 fprintf(stderr, "Sending file timestamps: %s", buf); 587 } 588 (void) atomicio(vwrite, fd, buf, strlen(buf)); 589 return (response()); 590 } 591 592 void 593 toremote(char *targ, int argc, char **argv) 594 { 595 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 596 arglist alist; 597 int i; 598 u_int j; 599 600 memset(&alist, '\0', sizeof(alist)); 601 alist.list = NULL; 602 603 *targ++ = 0; 604 if (*targ == 0) 605 targ = "."; 606 607 arg = xstrdup(argv[argc - 1]); 608 if ((thost = strrchr(arg, '@'))) { 609 /* user@host */ 610 *thost++ = 0; 611 tuser = arg; 612 if (*tuser == '\0') 613 tuser = NULL; 614 } else { 615 thost = arg; 616 tuser = NULL; 617 } 618 619 if (tuser != NULL && !okname(tuser)) { 620 free(arg); 621 return; 622 } 623 624 for (i = 0; i < argc - 1; i++) { 625 src = colon(argv[i]); 626 if (src && throughlocal) { /* extended remote to remote */ 627 *src++ = 0; 628 if (*src == 0) 629 src = "."; 630 host = strrchr(argv[i], '@'); 631 if (host) { 632 *host++ = 0; 633 host = cleanhostname(host); 634 suser = argv[i]; 635 if (*suser == '\0') 636 suser = pwd->pw_name; 637 else if (!okname(suser)) 638 continue; 639 } else { 640 host = cleanhostname(argv[i]); 641 suser = NULL; 642 } 643 xasprintf(&bp, "%s -f %s%s", cmd, 644 *src == '-' ? "-- " : "", src); 645 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 646 exit(1); 647 free(bp); 648 host = cleanhostname(thost); 649 xasprintf(&bp, "%s -t %s%s", cmd, 650 *targ == '-' ? "-- " : "", targ); 651 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 652 exit(1); 653 free(bp); 654 (void) close(remin); 655 (void) close(remout); 656 remin = remout = -1; 657 } else if (src) { /* standard remote to remote */ 658 freeargs(&alist); 659 addargs(&alist, "%s", ssh_program); 660 addargs(&alist, "-x"); 661 addargs(&alist, "-oClearAllForwardings=yes"); 662 addargs(&alist, "-n"); 663 for (j = 0; j < remote_remote_args.num; j++) { 664 addargs(&alist, "%s", 665 remote_remote_args.list[j]); 666 } 667 *src++ = 0; 668 if (*src == 0) 669 src = "."; 670 host = strrchr(argv[i], '@'); 671 672 if (host) { 673 *host++ = 0; 674 host = cleanhostname(host); 675 suser = argv[i]; 676 if (*suser == '\0') 677 suser = pwd->pw_name; 678 else if (!okname(suser)) 679 continue; 680 addargs(&alist, "-l"); 681 addargs(&alist, "%s", suser); 682 } else { 683 host = cleanhostname(argv[i]); 684 } 685 addargs(&alist, "--"); 686 addargs(&alist, "%s", host); 687 addargs(&alist, "%s", cmd); 688 addargs(&alist, "%s", src); 689 addargs(&alist, "%s%s%s:%s", 690 tuser ? tuser : "", tuser ? "@" : "", 691 thost, targ); 692 if (do_local_cmd(&alist) != 0) 693 errs = 1; 694 } else { /* local to remote */ 695 if (remin == -1) { 696 xasprintf(&bp, "%s -t %s%s", cmd, 697 *targ == '-' ? "-- " : "", targ); 698 host = cleanhostname(thost); 699 if (do_cmd(host, tuser, bp, &remin, 700 &remout) < 0) 701 exit(1); 702 if (response() < 0) 703 exit(1); 704 free(bp); 705 } 706 source(1, argv + i); 707 } 708 } 709 free(arg); 710 } 711 712 void 713 tolocal(int argc, char **argv) 714 { 715 char *bp, *host, *src, *suser; 716 arglist alist; 717 int i; 718 719 memset(&alist, '\0', sizeof(alist)); 720 alist.list = NULL; 721 722 for (i = 0; i < argc - 1; i++) { 723 if (!(src = colon(argv[i]))) { /* Local to local. */ 724 freeargs(&alist); 725 addargs(&alist, "%s", _PATH_CP); 726 if (iamrecursive) 727 addargs(&alist, "-r"); 728 if (pflag) 729 addargs(&alist, "-p"); 730 addargs(&alist, "--"); 731 addargs(&alist, "%s", argv[i]); 732 addargs(&alist, "%s", argv[argc-1]); 733 if (do_local_cmd(&alist)) 734 ++errs; 735 continue; 736 } 737 *src++ = 0; 738 if (*src == 0) 739 src = "."; 740 if ((host = strrchr(argv[i], '@')) == NULL) { 741 host = argv[i]; 742 suser = NULL; 743 } else { 744 *host++ = 0; 745 suser = argv[i]; 746 if (*suser == '\0') 747 suser = pwd->pw_name; 748 } 749 host = cleanhostname(host); 750 xasprintf(&bp, "%s -f %s%s", 751 cmd, *src == '-' ? "-- " : "", src); 752 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 753 free(bp); 754 ++errs; 755 continue; 756 } 757 free(bp); 758 sink(1, argv + argc - 1); 759 (void) close(remin); 760 remin = remout = -1; 761 } 762 } 763 764 void 765 source(int argc, char **argv) 766 { 767 struct stat stb; 768 static BUF buffer; 769 BUF *bp; 770 off_t i, statbytes; 771 size_t amt, nr; 772 int fd = -1, haderr, indx; 773 char *last, *name, buf[2048], encname[PATH_MAX]; 774 int len; 775 776 for (indx = 0; indx < argc; ++indx) { 777 name = argv[indx]; 778 statbytes = 0; 779 len = strlen(name); 780 while (len > 1 && name[len-1] == '/') 781 name[--len] = '\0'; 782 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 783 goto syserr; 784 if (strchr(name, '\n') != NULL) { 785 strnvis(encname, name, sizeof(encname), VIS_NL); 786 name = encname; 787 } 788 if (fstat(fd, &stb) < 0) { 789 syserr: run_err("%s: %s", name, strerror(errno)); 790 goto next; 791 } 792 if (stb.st_size < 0) { 793 run_err("%s: %s", name, "Negative file size"); 794 goto next; 795 } 796 unset_nonblock(fd); 797 switch (stb.st_mode & S_IFMT) { 798 case S_IFREG: 799 break; 800 case S_IFDIR: 801 if (iamrecursive) { 802 rsource(name, &stb); 803 goto next; 804 } 805 /* FALLTHROUGH */ 806 default: 807 run_err("%s: not a regular file", name); 808 goto next; 809 } 810 if ((last = strrchr(name, '/')) == NULL) 811 last = name; 812 else 813 ++last; 814 curfile = last; 815 if (pflag) { 816 if (do_times(remout, verbose_mode, &stb) < 0) 817 goto next; 818 } 819 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 820 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 821 (u_int) (stb.st_mode & FILEMODEMASK), 822 (long long)stb.st_size, last); 823 if (verbose_mode) 824 fmprintf(stderr, "Sending file modes: %s", buf); 825 (void) atomicio(vwrite, remout, buf, strlen(buf)); 826 if (response() < 0) 827 goto next; 828 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 829 next: if (fd != -1) { 830 (void) close(fd); 831 fd = -1; 832 } 833 continue; 834 } 835 if (showprogress) 836 start_progress_meter(curfile, stb.st_size, &statbytes); 837 set_nonblock(remout); 838 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 839 amt = bp->cnt; 840 if (i + (off_t)amt > stb.st_size) 841 amt = stb.st_size - i; 842 if (!haderr) { 843 if ((nr = atomicio(read, fd, 844 bp->buf, amt)) != amt) { 845 haderr = errno; 846 memset(bp->buf + nr, 0, amt - nr); 847 } 848 } 849 /* Keep writing after error to retain sync */ 850 if (haderr) { 851 (void)atomicio(vwrite, remout, bp->buf, amt); 852 memset(bp->buf, 0, amt); 853 continue; 854 } 855 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 856 &statbytes) != amt) 857 haderr = errno; 858 } 859 unset_nonblock(remout); 860 861 if (fd != -1) { 862 if (close(fd) < 0 && !haderr) 863 haderr = errno; 864 fd = -1; 865 } 866 if (!haderr) 867 (void) atomicio(vwrite, remout, "", 1); 868 else 869 run_err("%s: %s", name, strerror(haderr)); 870 (void) response(); 871 if (showprogress) 872 stop_progress_meter(); 873 } 874 } 875 876 void 877 rsource(char *name, struct stat *statp) 878 { 879 DIR *dirp; 880 struct dirent *dp; 881 char *last, *vect[1], path[PATH_MAX]; 882 883 if (!(dirp = opendir(name))) { 884 run_err("%s: %s", name, strerror(errno)); 885 return; 886 } 887 last = strrchr(name, '/'); 888 if (last == NULL) 889 last = name; 890 else 891 last++; 892 if (pflag) { 893 if (do_times(remout, verbose_mode, statp) < 0) { 894 closedir(dirp); 895 return; 896 } 897 } 898 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 899 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 900 if (verbose_mode) 901 fmprintf(stderr, "Entering directory: %s", path); 902 (void) atomicio(vwrite, remout, path, strlen(path)); 903 if (response() < 0) { 904 closedir(dirp); 905 return; 906 } 907 while ((dp = readdir(dirp)) != NULL) { 908 if (dp->d_ino == 0) 909 continue; 910 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 911 continue; 912 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 913 run_err("%s/%s: name too long", name, dp->d_name); 914 continue; 915 } 916 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 917 vect[0] = path; 918 source(1, vect); 919 } 920 (void) closedir(dirp); 921 (void) atomicio(vwrite, remout, "E\n", 2); 922 (void) response(); 923 } 924 925 #define TYPE_OVERFLOW(type, val) \ 926 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 927 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 928 (sizeof(type) != 4 && sizeof(type) != 8)) 929 930 void 931 sink(int argc, char **argv) 932 { 933 static BUF buffer; 934 struct stat stb; 935 enum { 936 YES, NO, DISPLAYED 937 } wrerr; 938 BUF *bp; 939 off_t i; 940 size_t j, count; 941 int amt, exists, first, ofd; 942 mode_t mode, omode, mask; 943 off_t size, statbytes; 944 unsigned long long ull; 945 int setimes, targisdir, wrerrno = 0; 946 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 947 struct timeval tv[2]; 948 949 #define atime tv[0] 950 #define mtime tv[1] 951 #define SCREWUP(str) { why = str; goto screwup; } 952 953 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 954 SCREWUP("Unexpected off_t/time_t size"); 955 956 setimes = targisdir = 0; 957 mask = umask(0); 958 if (!pflag) 959 (void) umask(mask); 960 if (argc != 1) { 961 run_err("ambiguous target"); 962 exit(1); 963 } 964 targ = *argv; 965 if (targetshouldbedirectory) 966 verifydir(targ); 967 968 (void) atomicio(vwrite, remout, "", 1); 969 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 970 targisdir = 1; 971 for (first = 1;; first = 0) { 972 cp = buf; 973 if (atomicio(read, remin, cp, 1) != 1) 974 return; 975 if (*cp++ == '\n') 976 SCREWUP("unexpected <newline>"); 977 do { 978 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 979 SCREWUP("lost connection"); 980 *cp++ = ch; 981 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 982 *cp = 0; 983 if (verbose_mode) 984 fmprintf(stderr, "Sink: %s", buf); 985 986 if (buf[0] == '\01' || buf[0] == '\02') { 987 if (iamremote == 0) { 988 (void) snmprintf(visbuf, sizeof(visbuf), 989 NULL, "%s", buf + 1); 990 (void) atomicio(vwrite, STDERR_FILENO, 991 visbuf, strlen(visbuf)); 992 } 993 if (buf[0] == '\02') 994 exit(1); 995 ++errs; 996 continue; 997 } 998 if (buf[0] == 'E') { 999 (void) atomicio(vwrite, remout, "", 1); 1000 return; 1001 } 1002 if (ch == '\n') 1003 *--cp = 0; 1004 1005 cp = buf; 1006 if (*cp == 'T') { 1007 setimes++; 1008 cp++; 1009 if (!isdigit((unsigned char)*cp)) 1010 SCREWUP("mtime.sec not present"); 1011 ull = strtoull(cp, &cp, 10); 1012 if (!cp || *cp++ != ' ') 1013 SCREWUP("mtime.sec not delimited"); 1014 if (TYPE_OVERFLOW(time_t, ull)) 1015 setimes = 0; /* out of range */ 1016 mtime.tv_sec = ull; 1017 mtime.tv_usec = strtol(cp, &cp, 10); 1018 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1019 mtime.tv_usec > 999999) 1020 SCREWUP("mtime.usec not delimited"); 1021 if (!isdigit((unsigned char)*cp)) 1022 SCREWUP("atime.sec not present"); 1023 ull = strtoull(cp, &cp, 10); 1024 if (!cp || *cp++ != ' ') 1025 SCREWUP("atime.sec not delimited"); 1026 if (TYPE_OVERFLOW(time_t, ull)) 1027 setimes = 0; /* out of range */ 1028 atime.tv_sec = ull; 1029 atime.tv_usec = strtol(cp, &cp, 10); 1030 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1031 atime.tv_usec > 999999) 1032 SCREWUP("atime.usec not delimited"); 1033 (void) atomicio(vwrite, remout, "", 1); 1034 continue; 1035 } 1036 if (*cp != 'C' && *cp != 'D') { 1037 /* 1038 * Check for the case "rcp remote:foo\* local:bar". 1039 * In this case, the line "No match." can be returned 1040 * by the shell before the rcp command on the remote is 1041 * executed so the ^Aerror_message convention isn't 1042 * followed. 1043 */ 1044 if (first) { 1045 run_err("%s", cp); 1046 exit(1); 1047 } 1048 SCREWUP("expected control record"); 1049 } 1050 mode = 0; 1051 for (++cp; cp < buf + 5; cp++) { 1052 if (*cp < '0' || *cp > '7') 1053 SCREWUP("bad mode"); 1054 mode = (mode << 3) | (*cp - '0'); 1055 } 1056 if (*cp++ != ' ') 1057 SCREWUP("mode not delimited"); 1058 1059 if (!isdigit((unsigned char)*cp)) 1060 SCREWUP("size not present"); 1061 ull = strtoull(cp, &cp, 10); 1062 if (!cp || *cp++ != ' ') 1063 SCREWUP("size not delimited"); 1064 if (TYPE_OVERFLOW(off_t, ull)) 1065 SCREWUP("size out of range"); 1066 size = (off_t)ull; 1067 1068 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1069 run_err("error: unexpected filename: %s", cp); 1070 exit(1); 1071 } 1072 if (targisdir) { 1073 static char *namebuf; 1074 static size_t cursize; 1075 size_t need; 1076 1077 need = strlen(targ) + strlen(cp) + 250; 1078 if (need > cursize) { 1079 free(namebuf); 1080 namebuf = xmalloc(need); 1081 cursize = need; 1082 } 1083 (void) snprintf(namebuf, need, "%s%s%s", targ, 1084 strcmp(targ, "/") ? "/" : "", cp); 1085 np = namebuf; 1086 } else 1087 np = targ; 1088 curfile = cp; 1089 exists = stat(np, &stb) == 0; 1090 if (buf[0] == 'D') { 1091 int mod_flag = pflag; 1092 if (!iamrecursive) 1093 SCREWUP("received directory without -r"); 1094 if (exists) { 1095 if (!S_ISDIR(stb.st_mode)) { 1096 errno = ENOTDIR; 1097 goto bad; 1098 } 1099 if (pflag) 1100 (void) chmod(np, mode); 1101 } else { 1102 /* Handle copying from a read-only 1103 directory */ 1104 mod_flag = 1; 1105 if (mkdir(np, mode | S_IRWXU) < 0) 1106 goto bad; 1107 } 1108 vect[0] = xstrdup(np); 1109 sink(1, vect); 1110 if (setimes) { 1111 setimes = 0; 1112 if (utimes(vect[0], tv) < 0) 1113 run_err("%s: set times: %s", 1114 vect[0], strerror(errno)); 1115 } 1116 if (mod_flag) 1117 (void) chmod(vect[0], mode); 1118 free(vect[0]); 1119 continue; 1120 } 1121 omode = mode; 1122 mode |= S_IWUSR; 1123 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1124 bad: run_err("%s: %s", np, strerror(errno)); 1125 continue; 1126 } 1127 (void) atomicio(vwrite, remout, "", 1); 1128 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1129 (void) close(ofd); 1130 continue; 1131 } 1132 cp = bp->buf; 1133 wrerr = NO; 1134 1135 statbytes = 0; 1136 if (showprogress) 1137 start_progress_meter(curfile, size, &statbytes); 1138 set_nonblock(remin); 1139 for (count = i = 0; i < size; i += bp->cnt) { 1140 amt = bp->cnt; 1141 if (i + amt > size) 1142 amt = size - i; 1143 count += amt; 1144 do { 1145 j = atomicio6(read, remin, cp, amt, 1146 scpio, &statbytes); 1147 if (j == 0) { 1148 run_err("%s", j != EPIPE ? 1149 strerror(errno) : 1150 "dropped connection"); 1151 exit(1); 1152 } 1153 amt -= j; 1154 cp += j; 1155 } while (amt > 0); 1156 1157 if (count == bp->cnt) { 1158 /* Keep reading so we stay sync'd up. */ 1159 if (wrerr == NO) { 1160 if (atomicio(vwrite, ofd, bp->buf, 1161 count) != count) { 1162 wrerr = YES; 1163 wrerrno = errno; 1164 } 1165 } 1166 count = 0; 1167 cp = bp->buf; 1168 } 1169 } 1170 unset_nonblock(remin); 1171 if (count != 0 && wrerr == NO && 1172 atomicio(vwrite, ofd, bp->buf, count) != count) { 1173 wrerr = YES; 1174 wrerrno = errno; 1175 } 1176 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1177 ftruncate(ofd, size) != 0) { 1178 run_err("%s: truncate: %s", np, strerror(errno)); 1179 wrerr = DISPLAYED; 1180 } 1181 if (pflag) { 1182 if (exists || omode != mode) 1183 #ifdef HAVE_FCHMOD 1184 if (fchmod(ofd, omode)) { 1185 #else /* HAVE_FCHMOD */ 1186 if (chmod(np, omode)) { 1187 #endif /* HAVE_FCHMOD */ 1188 run_err("%s: set mode: %s", 1189 np, strerror(errno)); 1190 wrerr = DISPLAYED; 1191 } 1192 } else { 1193 if (!exists && omode != mode) 1194 #ifdef HAVE_FCHMOD 1195 if (fchmod(ofd, omode & ~mask)) { 1196 #else /* HAVE_FCHMOD */ 1197 if (chmod(np, omode & ~mask)) { 1198 #endif /* HAVE_FCHMOD */ 1199 run_err("%s: set mode: %s", 1200 np, strerror(errno)); 1201 wrerr = DISPLAYED; 1202 } 1203 } 1204 if (close(ofd) == -1) { 1205 wrerr = YES; 1206 wrerrno = errno; 1207 } 1208 (void) response(); 1209 if (showprogress) 1210 stop_progress_meter(); 1211 if (setimes && wrerr == NO) { 1212 setimes = 0; 1213 if (utimes(np, tv) < 0) { 1214 run_err("%s: set times: %s", 1215 np, strerror(errno)); 1216 wrerr = DISPLAYED; 1217 } 1218 } 1219 switch (wrerr) { 1220 case YES: 1221 run_err("%s: %s", np, strerror(wrerrno)); 1222 break; 1223 case NO: 1224 (void) atomicio(vwrite, remout, "", 1); 1225 break; 1226 case DISPLAYED: 1227 break; 1228 } 1229 } 1230 screwup: 1231 run_err("protocol error: %s", why); 1232 exit(1); 1233 } 1234 1235 int 1236 response(void) 1237 { 1238 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1239 1240 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1241 lostconn(0); 1242 1243 cp = rbuf; 1244 switch (resp) { 1245 case 0: /* ok */ 1246 return (0); 1247 default: 1248 *cp++ = resp; 1249 /* FALLTHROUGH */ 1250 case 1: /* error, followed by error msg */ 1251 case 2: /* fatal error, "" */ 1252 do { 1253 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1254 lostconn(0); 1255 *cp++ = ch; 1256 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1257 1258 if (!iamremote) { 1259 cp[-1] = '\0'; 1260 (void) snmprintf(visbuf, sizeof(visbuf), 1261 NULL, "%s\n", rbuf); 1262 (void) atomicio(vwrite, STDERR_FILENO, 1263 visbuf, strlen(visbuf)); 1264 } 1265 ++errs; 1266 if (resp == 1) 1267 return (-1); 1268 exit(1); 1269 } 1270 /* NOTREACHED */ 1271 } 1272 1273 void 1274 usage(void) 1275 { 1276 (void) fprintf(stderr, 1277 "usage: scp [-346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1278 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1279 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1280 exit(1); 1281 } 1282 1283 void 1284 run_err(const char *fmt,...) 1285 { 1286 static FILE *fp; 1287 va_list ap; 1288 1289 ++errs; 1290 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1291 (void) fprintf(fp, "%c", 0x01); 1292 (void) fprintf(fp, "scp: "); 1293 va_start(ap, fmt); 1294 (void) vfprintf(fp, fmt, ap); 1295 va_end(ap); 1296 (void) fprintf(fp, "\n"); 1297 (void) fflush(fp); 1298 } 1299 1300 if (!iamremote) { 1301 va_start(ap, fmt); 1302 vfmprintf(stderr, fmt, ap); 1303 va_end(ap); 1304 fprintf(stderr, "\n"); 1305 } 1306 } 1307 1308 void 1309 verifydir(char *cp) 1310 { 1311 struct stat stb; 1312 1313 if (!stat(cp, &stb)) { 1314 if (S_ISDIR(stb.st_mode)) 1315 return; 1316 errno = ENOTDIR; 1317 } 1318 run_err("%s: %s", cp, strerror(errno)); 1319 killchild(0); 1320 } 1321 1322 int 1323 okname(char *cp0) 1324 { 1325 int c; 1326 char *cp; 1327 1328 cp = cp0; 1329 do { 1330 c = (int)*cp; 1331 if (c & 0200) 1332 goto bad; 1333 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1334 switch (c) { 1335 case '\'': 1336 case '"': 1337 case '`': 1338 case ' ': 1339 case '#': 1340 goto bad; 1341 default: 1342 break; 1343 } 1344 } 1345 } while (*++cp); 1346 return (1); 1347 1348 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1349 return (0); 1350 } 1351 1352 BUF * 1353 allocbuf(BUF *bp, int fd, int blksize) 1354 { 1355 size_t size; 1356 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1357 struct stat stb; 1358 1359 if (fstat(fd, &stb) < 0) { 1360 run_err("fstat: %s", strerror(errno)); 1361 return (0); 1362 } 1363 size = ROUNDUP(stb.st_blksize, blksize); 1364 if (size == 0) 1365 size = blksize; 1366 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1367 size = blksize; 1368 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1369 if (bp->cnt >= size) 1370 return (bp); 1371 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 1372 bp->cnt = size; 1373 return (bp); 1374 } 1375 1376 void 1377 lostconn(int signo) 1378 { 1379 if (!iamremote) 1380 (void)write(STDERR_FILENO, "lost connection\n", 16); 1381 if (signo) 1382 _exit(1); 1383 else 1384 exit(1); 1385 } 1386