1 /* $NetBSD: scp.c,v 1.15 2016/12/25 00:07:47 christos Exp $ */ 2 /* $OpenBSD: scp.c,v 1.187 2016/09/12 01:22:38 deraadt Exp $ */ 3 4 /* 5 * scp - secure remote copy. This is basically patched BSD rcp which 6 * uses ssh to do the data transfer (instead of using rcmd). 7 * 8 * NOTE: This version should NOT be suid root. (This uses ssh to 9 * do the transfer and ssh has the necessary privileges.) 10 * 11 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 12 * 13 * As far as I am concerned, the code I have written for this software 14 * can be used freely for any purpose. Any derived versions of this 15 * software must be clearly marked as such, and if the derived work is 16 * incompatible with the protocol description in the RFC file, it must be 17 * called by a name other than "ssh" or "Secure Shell". 18 */ 19 /* 20 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 21 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the above copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 33 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 34 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 35 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 36 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 41 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44 /* 45 * Parts from: 46 * 47 * Copyright (c) 1983, 1990, 1992, 1993, 1995 48 * The Regents of the University of California. All rights reserved. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 */ 75 76 #include "includes.h" 77 __RCSID("$NetBSD: scp.c,v 1.15 2016/12/25 00:07:47 christos Exp $"); 78 79 #include <sys/param.h> /* roundup MAX */ 80 #include <sys/types.h> 81 #include <sys/poll.h> 82 #include <sys/wait.h> 83 #include <sys/stat.h> 84 #include <sys/time.h> 85 #include <sys/uio.h> 86 87 #include <ctype.h> 88 #include <dirent.h> 89 #include <errno.h> 90 #include <fcntl.h> 91 #include <locale.h> 92 #include <pwd.h> 93 #include <signal.h> 94 #include <stdarg.h> 95 #include <stdio.h> 96 #include <stdlib.h> 97 #include <string.h> 98 #include <time.h> 99 #include <unistd.h> 100 #include <limits.h> 101 #include <vis.h> 102 103 #include "xmalloc.h" 104 #include "atomicio.h" 105 #include "pathnames.h" 106 #include "log.h" 107 #include "misc.h" 108 #include "progressmeter.h" 109 #include "utf8.h" 110 111 #define COPY_BUFLEN 16384 112 113 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 114 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 115 116 static char dot[] = "."; 117 static char empty[] = ""; 118 119 /* Struct for addargs */ 120 arglist args; 121 arglist remote_remote_args; 122 123 /* Bandwidth limit */ 124 long long limit_kbps = 0; 125 struct bwlimit bwlimit; 126 127 /* Name of current file being transferred. */ 128 char *curfile; 129 130 /* This is set to non-zero to enable verbose mode. */ 131 int verbose_mode = 0; 132 133 /* This is set to zero if the progressmeter is not desired. */ 134 int showprogress = 1; 135 136 /* 137 * This is set to non-zero if remote-remote copy should be piped 138 * through this process. 139 */ 140 int throughlocal = 0; 141 142 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 143 #ifdef RESCUEDIR 144 const char *ssh_program = RESCUEDIR "/ssh"; 145 #else 146 const char *ssh_program = _PATH_SSH_PROGRAM; 147 #endif 148 149 /* This is used to store the pid of ssh_program */ 150 pid_t do_cmd_pid = -1; 151 152 __dead static void 153 killchild(int signo) 154 { 155 if (do_cmd_pid > 1) { 156 kill(do_cmd_pid, signo ? signo : SIGTERM); 157 waitpid(do_cmd_pid, NULL, 0); 158 } 159 160 if (signo) 161 _exit(1); 162 exit(1); 163 } 164 165 static void 166 suspchild(int signo) 167 { 168 int status; 169 170 if (do_cmd_pid > 1) { 171 kill(do_cmd_pid, signo); 172 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 173 errno == EINTR) 174 ; 175 kill(getpid(), SIGSTOP); 176 } 177 } 178 179 static int 180 do_local_cmd(arglist *a) 181 { 182 u_int i; 183 int status; 184 pid_t pid; 185 186 if (a->num == 0) 187 fatal("do_local_cmd: no arguments"); 188 189 if (verbose_mode) { 190 fprintf(stderr, "Executing:"); 191 for (i = 0; i < a->num; i++) 192 fmprintf(stderr, " %s", a->list[i]); 193 fprintf(stderr, "\n"); 194 } 195 if ((pid = fork()) == -1) 196 fatal("do_local_cmd: fork: %s", strerror(errno)); 197 198 if (pid == 0) { 199 execvp(a->list[0], a->list); 200 perror(a->list[0]); 201 exit(1); 202 } 203 204 do_cmd_pid = pid; 205 signal(SIGTERM, killchild); 206 signal(SIGINT, killchild); 207 signal(SIGHUP, killchild); 208 209 while (waitpid(pid, &status, 0) == -1) 210 if (errno != EINTR) 211 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 212 213 do_cmd_pid = -1; 214 215 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 216 return (-1); 217 218 return (0); 219 } 220 221 /* 222 * This function executes the given command as the specified user on the 223 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 224 * assigns the input and output file descriptors on success. 225 */ 226 227 int 228 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 229 { 230 int pin[2], pout[2], reserved[2]; 231 232 if (verbose_mode) 233 fmprintf(stderr, 234 "Executing: program %s host %s, user %s, command %s\n", 235 ssh_program, host, 236 remuser ? remuser : "(unspecified)", cmd); 237 238 /* 239 * Reserve two descriptors so that the real pipes won't get 240 * descriptors 0 and 1 because that will screw up dup2 below. 241 */ 242 if (pipe(reserved) < 0) 243 fatal("pipe: %s", strerror(errno)); 244 245 /* Create a socket pair for communicating with ssh. */ 246 if (pipe(pin) < 0) 247 fatal("pipe: %s", strerror(errno)); 248 if (pipe(pout) < 0) 249 fatal("pipe: %s", strerror(errno)); 250 251 /* Free the reserved descriptors. */ 252 close(reserved[0]); 253 close(reserved[1]); 254 255 signal(SIGTSTP, suspchild); 256 signal(SIGTTIN, suspchild); 257 signal(SIGTTOU, suspchild); 258 259 /* Fork a child to execute the command on the remote host using ssh. */ 260 do_cmd_pid = fork(); 261 if (do_cmd_pid == 0) { 262 /* Child. */ 263 close(pin[1]); 264 close(pout[0]); 265 dup2(pin[0], 0); 266 dup2(pout[1], 1); 267 close(pin[0]); 268 close(pout[1]); 269 270 replacearg(&args, 0, "%s", ssh_program); 271 if (remuser != NULL) { 272 addargs(&args, "-l"); 273 addargs(&args, "%s", remuser); 274 } 275 addargs(&args, "--"); 276 addargs(&args, "%s", host); 277 addargs(&args, "%s", cmd); 278 279 execvp(ssh_program, args.list); 280 perror(ssh_program); 281 exit(1); 282 } else if (do_cmd_pid == -1) { 283 fatal("fork: %s", strerror(errno)); 284 } 285 /* Parent. Close the other side, and return the local side. */ 286 close(pin[0]); 287 *fdout = pin[1]; 288 close(pout[1]); 289 *fdin = pout[0]; 290 signal(SIGTERM, killchild); 291 signal(SIGINT, killchild); 292 signal(SIGHUP, killchild); 293 return 0; 294 } 295 296 /* 297 * This functions executes a command simlar to do_cmd(), but expects the 298 * input and output descriptors to be setup by a previous call to do_cmd(). 299 * This way the input and output of two commands can be connected. 300 */ 301 int 302 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 303 { 304 pid_t pid; 305 int status; 306 307 if (verbose_mode) 308 fmprintf(stderr, 309 "Executing: 2nd program %s host %s, user %s, command %s\n", 310 ssh_program, host, 311 remuser ? remuser : "(unspecified)", cmd); 312 313 /* Fork a child to execute the command on the remote host using ssh. */ 314 pid = fork(); 315 if (pid == 0) { 316 dup2(fdin, 0); 317 dup2(fdout, 1); 318 319 replacearg(&args, 0, "%s", ssh_program); 320 if (remuser != NULL) { 321 addargs(&args, "-l"); 322 addargs(&args, "%s", remuser); 323 } 324 addargs(&args, "--"); 325 addargs(&args, "%s", host); 326 addargs(&args, "%s", cmd); 327 328 execvp(ssh_program, args.list); 329 perror(ssh_program); 330 exit(1); 331 } else if (pid == -1) { 332 fatal("fork: %s", strerror(errno)); 333 } 334 while (waitpid(pid, &status, 0) == -1) 335 if (errno != EINTR) 336 fatal("do_cmd2: waitpid: %s", strerror(errno)); 337 return 0; 338 } 339 340 typedef struct { 341 size_t cnt; 342 char *buf; 343 } BUF; 344 345 BUF *allocbuf(BUF *, int, int); 346 __dead static void lostconn(int); 347 int okname(char *); 348 void run_err(const char *,...) __printflike(1, 2); 349 void verifydir(char *); 350 351 struct passwd *pwd; 352 uid_t userid; 353 int errs, remin, remout; 354 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 355 356 #define CMDNEEDS 64 357 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 358 359 int response(void); 360 void rsource(char *, struct stat *); 361 void sink(int, char *[]); 362 void source(int, char *[]); 363 static void tolocal(int, char *[]); 364 static void toremote(char *, int, char *[]); 365 __dead static void usage(void); 366 367 int 368 main(int argc, char **argv) 369 { 370 int ch, fflag, tflag, status, n; 371 char *targ, **newargv; 372 const char *errstr; 373 extern char *optarg; 374 extern int optind; 375 376 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 377 sanitise_stdfd(); 378 379 setlocale(LC_CTYPE, ""); 380 381 /* Copy argv, because we modify it */ 382 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 383 for (n = 0; n < argc; n++) 384 newargv[n] = xstrdup(argv[n]); 385 argv = newargv; 386 387 memset(&args, '\0', sizeof(args)); 388 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 389 args.list = remote_remote_args.list = NULL; 390 addargs(&args, "%s", ssh_program); 391 addargs(&args, "-x"); 392 addargs(&args, "-oForwardAgent=no"); 393 addargs(&args, "-oPermitLocalCommand=no"); 394 addargs(&args, "-oClearAllForwardings=yes"); 395 396 fflag = tflag = 0; 397 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 398 switch (ch) { 399 /* User-visible flags. */ 400 case '1': 401 case '2': 402 case '4': 403 case '6': 404 case 'C': 405 addargs(&args, "-%c", ch); 406 addargs(&remote_remote_args, "-%c", ch); 407 break; 408 case '3': 409 throughlocal = 1; 410 break; 411 case 'o': 412 case 'c': 413 case 'i': 414 case 'F': 415 addargs(&remote_remote_args, "-%c", ch); 416 addargs(&remote_remote_args, "%s", optarg); 417 addargs(&args, "-%c", ch); 418 addargs(&args, "%s", optarg); 419 break; 420 case 'P': 421 addargs(&remote_remote_args, "-p"); 422 addargs(&remote_remote_args, "%s", optarg); 423 addargs(&args, "-p"); 424 addargs(&args, "%s", optarg); 425 break; 426 case 'B': 427 addargs(&remote_remote_args, "-oBatchmode=yes"); 428 addargs(&args, "-oBatchmode=yes"); 429 break; 430 case 'l': 431 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 432 &errstr); 433 if (errstr != NULL) 434 usage(); 435 limit_kbps *= 1024; /* kbps */ 436 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 437 break; 438 case 'p': 439 pflag = 1; 440 break; 441 case 'r': 442 iamrecursive = 1; 443 break; 444 case 'S': 445 ssh_program = xstrdup(optarg); 446 break; 447 case 'v': 448 addargs(&args, "-v"); 449 addargs(&remote_remote_args, "-v"); 450 verbose_mode = 1; 451 break; 452 case 'q': 453 addargs(&args, "-q"); 454 addargs(&remote_remote_args, "-q"); 455 showprogress = 0; 456 break; 457 458 /* Server options. */ 459 case 'd': 460 targetshouldbedirectory = 1; 461 break; 462 case 'f': /* "from" */ 463 iamremote = 1; 464 fflag = 1; 465 break; 466 case 't': /* "to" */ 467 iamremote = 1; 468 tflag = 1; 469 break; 470 default: 471 usage(); 472 } 473 argc -= optind; 474 argv += optind; 475 476 if ((pwd = getpwuid(userid = getuid())) == NULL) 477 fatal("unknown user %u", (u_int) userid); 478 479 if (!isatty(STDOUT_FILENO)) 480 showprogress = 0; 481 482 if (pflag) { 483 /* Cannot pledge: -p allows setuid/setgid files... */ 484 } else { 485 #ifdef __OpenBSD__ 486 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 487 NULL) == -1) { 488 perror("pledge"); 489 exit(1); 490 } 491 #endif 492 } 493 494 remin = STDIN_FILENO; 495 remout = STDOUT_FILENO; 496 497 if (fflag) { 498 /* Follow "protocol", send data. */ 499 (void) response(); 500 source(argc, argv); 501 exit(errs != 0); 502 } 503 if (tflag) { 504 /* Receive data. */ 505 sink(argc, argv); 506 exit(errs != 0); 507 } 508 if (argc < 2) 509 usage(); 510 if (argc > 2) 511 targetshouldbedirectory = 1; 512 513 remin = remout = -1; 514 do_cmd_pid = -1; 515 /* Command to be executed on remote system using "ssh". */ 516 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 517 verbose_mode ? " -v" : "", 518 iamrecursive ? " -r" : "", pflag ? " -p" : "", 519 targetshouldbedirectory ? " -d" : ""); 520 521 (void) signal(SIGPIPE, lostconn); 522 523 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 524 toremote(targ, argc, argv); 525 else { 526 if (targetshouldbedirectory) 527 verifydir(argv[argc - 1]); 528 tolocal(argc, argv); /* Dest is local host. */ 529 } 530 /* 531 * Finally check the exit status of the ssh process, if one was forked 532 * and no error has occurred yet 533 */ 534 if (do_cmd_pid != -1 && errs == 0) { 535 if (remin != -1) 536 (void) close(remin); 537 if (remout != -1) 538 (void) close(remout); 539 if (waitpid(do_cmd_pid, &status, 0) == -1) 540 errs = 1; 541 else { 542 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 543 errs = 1; 544 } 545 } 546 exit(errs != 0); 547 } 548 549 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 550 static int 551 scpio(void *_cnt, size_t s) 552 { 553 off_t *cnt = (off_t *)_cnt; 554 555 *cnt += s; 556 if (limit_kbps > 0) 557 bandwidth_limit(&bwlimit, s); 558 return 0; 559 } 560 561 static int 562 do_times(int fd, int verb, const struct stat *sb) 563 { 564 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 565 char buf[(20 + 7 + 2) * 2 + 2]; 566 567 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 568 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 569 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 570 if (verb) { 571 fprintf(stderr, "File mtime %lld atime %lld\n", 572 (long long)sb->st_mtime, (long long)sb->st_atime); 573 fprintf(stderr, "Sending file timestamps: %s", buf); 574 } 575 (void) atomicio(vwrite, fd, buf, strlen(buf)); 576 return (response()); 577 } 578 579 void 580 toremote(char *targ, int argc, char **argv) 581 { 582 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 583 arglist alist; 584 int i; 585 u_int j; 586 587 memset(&alist, '\0', sizeof(alist)); 588 alist.list = NULL; 589 590 *targ++ = 0; 591 if (*targ == 0) 592 targ = dot; 593 594 arg = xstrdup(argv[argc - 1]); 595 if ((thost = strrchr(arg, '@'))) { 596 /* user@host */ 597 *thost++ = 0; 598 tuser = arg; 599 if (*tuser == '\0') 600 tuser = NULL; 601 } else { 602 thost = arg; 603 tuser = NULL; 604 } 605 606 if (tuser != NULL && !okname(tuser)) { 607 free(arg); 608 return; 609 } 610 611 for (i = 0; i < argc - 1; i++) { 612 src = colon(argv[i]); 613 if (src && throughlocal) { /* extended remote to remote */ 614 *src++ = 0; 615 if (*src == 0) 616 src = dot; 617 host = strrchr(argv[i], '@'); 618 if (host) { 619 *host++ = 0; 620 host = cleanhostname(host); 621 suser = argv[i]; 622 if (*suser == '\0') 623 suser = pwd->pw_name; 624 else if (!okname(suser)) 625 continue; 626 } else { 627 host = cleanhostname(argv[i]); 628 suser = NULL; 629 } 630 xasprintf(&bp, "%s -f %s%s", cmd, 631 *src == '-' ? "-- " : "", src); 632 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 633 exit(1); 634 free(bp); 635 host = cleanhostname(thost); 636 xasprintf(&bp, "%s -t %s%s", cmd, 637 *targ == '-' ? "-- " : "", targ); 638 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 639 exit(1); 640 free(bp); 641 (void) close(remin); 642 (void) close(remout); 643 remin = remout = -1; 644 } else if (src) { /* standard remote to remote */ 645 freeargs(&alist); 646 addargs(&alist, "%s", ssh_program); 647 addargs(&alist, "-x"); 648 addargs(&alist, "-oClearAllForwardings=yes"); 649 addargs(&alist, "-n"); 650 for (j = 0; j < remote_remote_args.num; j++) { 651 addargs(&alist, "%s", 652 remote_remote_args.list[j]); 653 } 654 *src++ = 0; 655 if (*src == 0) 656 src = dot; 657 host = strrchr(argv[i], '@'); 658 659 if (host) { 660 *host++ = 0; 661 host = cleanhostname(host); 662 suser = argv[i]; 663 if (*suser == '\0') 664 suser = pwd->pw_name; 665 else if (!okname(suser)) 666 continue; 667 addargs(&alist, "-l"); 668 addargs(&alist, "%s", suser); 669 } else { 670 host = cleanhostname(argv[i]); 671 } 672 addargs(&alist, "--"); 673 addargs(&alist, "%s", host); 674 addargs(&alist, "%s", cmd); 675 addargs(&alist, "%s", src); 676 addargs(&alist, "%s%s%s:%s", 677 tuser ? tuser : "", tuser ? "@" : "", 678 thost, targ); 679 if (do_local_cmd(&alist) != 0) 680 errs = 1; 681 } else { /* local to remote */ 682 if (remin == -1) { 683 xasprintf(&bp, "%s -t %s%s", cmd, 684 *targ == '-' ? "-- " : "", targ); 685 host = cleanhostname(thost); 686 if (do_cmd(host, tuser, bp, &remin, 687 &remout) < 0) 688 exit(1); 689 if (response() < 0) 690 exit(1); 691 free(bp); 692 } 693 source(1, argv + i); 694 } 695 } 696 free(arg); 697 } 698 699 static void 700 tolocal(int argc, char **argv) 701 { 702 char *bp, *host, *src, *suser; 703 arglist alist; 704 int i; 705 706 memset(&alist, '\0', sizeof(alist)); 707 alist.list = NULL; 708 709 for (i = 0; i < argc - 1; i++) { 710 if (!(src = colon(argv[i]))) { /* Local to local. */ 711 freeargs(&alist); 712 addargs(&alist, "%s", _PATH_CP); 713 if (iamrecursive) 714 addargs(&alist, "-r"); 715 if (pflag) 716 addargs(&alist, "-p"); 717 addargs(&alist, "--"); 718 addargs(&alist, "%s", argv[i]); 719 addargs(&alist, "%s", argv[argc-1]); 720 if (do_local_cmd(&alist)) 721 ++errs; 722 continue; 723 } 724 *src++ = 0; 725 if (*src == 0) 726 src = dot; 727 if ((host = strrchr(argv[i], '@')) == NULL) { 728 host = argv[i]; 729 suser = NULL; 730 } else { 731 *host++ = 0; 732 suser = argv[i]; 733 if (*suser == '\0') 734 suser = pwd->pw_name; 735 } 736 host = cleanhostname(host); 737 xasprintf(&bp, "%s -f %s%s", 738 cmd, *src == '-' ? "-- " : "", src); 739 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 740 free(bp); 741 ++errs; 742 continue; 743 } 744 free(bp); 745 sink(1, argv + argc - 1); 746 (void) close(remin); 747 remin = remout = -1; 748 } 749 } 750 751 void 752 source(int argc, char **argv) 753 { 754 struct stat stb; 755 static BUF buffer; 756 BUF *bp; 757 off_t i, statbytes; 758 size_t amt, nr; 759 int fd = -1, haderr, indx; 760 char *last, *name, buf[16384], encname[PATH_MAX]; 761 int len; 762 763 for (indx = 0; indx < argc; ++indx) { 764 fd = -1; 765 name = argv[indx]; 766 statbytes = 0; 767 len = strlen(name); 768 while (len > 1 && name[len-1] == '/') 769 name[--len] = '\0'; 770 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 771 goto syserr; 772 if (strchr(name, '\n') != NULL) { 773 strvisx(encname, name, len, VIS_NL); 774 name = encname; 775 } 776 if (fstat(fd, &stb) < 0) { 777 syserr: run_err("%s: %s", name, strerror(errno)); 778 goto next; 779 } 780 if (stb.st_size < 0) { 781 run_err("%s: %s", name, "Negative file size"); 782 goto next; 783 } 784 unset_nonblock(fd); 785 switch (stb.st_mode & S_IFMT) { 786 case S_IFREG: 787 break; 788 case S_IFDIR: 789 if (iamrecursive) { 790 rsource(name, &stb); 791 goto next; 792 } 793 /* FALLTHROUGH */ 794 default: 795 run_err("%s: not a regular file", name); 796 goto next; 797 } 798 if ((last = strrchr(name, '/')) == NULL) 799 last = name; 800 else 801 ++last; 802 curfile = last; 803 if (pflag) { 804 if (do_times(remout, verbose_mode, &stb) < 0) 805 goto next; 806 } 807 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 808 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 809 (u_int) (stb.st_mode & FILEMODEMASK), 810 (long long)stb.st_size, last); 811 if (verbose_mode) 812 fmprintf(stderr, "Sending file modes: %s", buf); 813 (void) atomicio(vwrite, remout, buf, strlen(buf)); 814 if (response() < 0) 815 goto next; 816 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 817 next: if (fd != -1) { 818 (void) close(fd); 819 fd = -1; 820 } 821 continue; 822 } 823 if (showprogress) 824 start_progress_meter(curfile, stb.st_size, &statbytes); 825 set_nonblock(remout); 826 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 827 amt = bp->cnt; 828 if (i + (off_t)amt > stb.st_size) 829 amt = stb.st_size - i; 830 if (!haderr) { 831 if ((nr = atomicio(read, fd, 832 bp->buf, amt)) != amt) { 833 haderr = errno; 834 memset(bp->buf + nr, 0, amt - nr); 835 } 836 } 837 /* Keep writing after error to retain sync */ 838 if (haderr) { 839 (void)atomicio(vwrite, remout, bp->buf, amt); 840 memset(bp->buf, 0, amt); 841 continue; 842 } 843 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 844 &statbytes) != amt) 845 haderr = errno; 846 } 847 unset_nonblock(remout); 848 849 if (fd != -1) { 850 if (close(fd) < 0 && !haderr) 851 haderr = errno; 852 fd = -1; 853 } 854 if (!haderr) 855 (void) atomicio(vwrite, remout, empty, 1); 856 else 857 run_err("%s: %s", name, strerror(haderr)); 858 (void) response(); 859 if (showprogress) 860 stop_progress_meter(); 861 } 862 } 863 864 void 865 rsource(char *name, struct stat *statp) 866 { 867 DIR *dirp; 868 struct dirent *dp; 869 char *last, *vect[1], path[PATH_MAX]; 870 871 if (!(dirp = opendir(name))) { 872 run_err("%s: %s", name, strerror(errno)); 873 return; 874 } 875 last = strrchr(name, '/'); 876 if (last == NULL) 877 last = name; 878 else 879 last++; 880 if (pflag) { 881 if (do_times(remout, verbose_mode, statp) < 0) { 882 closedir(dirp); 883 return; 884 } 885 } 886 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 887 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 888 if (verbose_mode) 889 fmprintf(stderr, "Entering directory: %s", path); 890 (void) atomicio(vwrite, remout, path, strlen(path)); 891 if (response() < 0) { 892 closedir(dirp); 893 return; 894 } 895 while ((dp = readdir(dirp)) != NULL) { 896 if (dp->d_ino == 0) 897 continue; 898 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 899 continue; 900 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 901 run_err("%s/%s: name too long", name, dp->d_name); 902 continue; 903 } 904 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 905 vect[0] = path; 906 source(1, vect); 907 } 908 (void) closedir(dirp); 909 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 910 (void) response(); 911 } 912 913 void 914 sink(int argc, char **argv) 915 { 916 static BUF buffer; 917 struct stat stb; 918 enum { 919 YES, NO, DISPLAYED 920 } wrerr; 921 BUF *bp; 922 off_t i; 923 size_t j, count; 924 int amt, exists, first, ofd; 925 mode_t mode, omode, mask; 926 off_t size, statbytes; 927 unsigned long long ull; 928 int setimes, targisdir, wrerrno = 0; 929 char ch, *cp, *np, *targ, *vect[1], buf[2048], visbuf[2048]; 930 const char *why; 931 struct timeval tv[2]; 932 933 #define atime tv[0] 934 #define mtime tv[1] 935 #define SCREWUP(str) { why = str; goto screwup; } 936 937 setimes = targisdir = 0; 938 mask = umask(0); 939 if (!pflag) 940 (void) umask(mask); 941 if (argc != 1) { 942 run_err("ambiguous target"); 943 exit(1); 944 } 945 targ = *argv; 946 if (targetshouldbedirectory) 947 verifydir(targ); 948 949 (void) atomicio(vwrite, remout, empty, 1); 950 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 951 targisdir = 1; 952 for (first = 1;; first = 0) { 953 cp = buf; 954 if (atomicio(read, remin, cp, 1) != 1) 955 return; 956 if (*cp++ == '\n') 957 SCREWUP("unexpected <newline>"); 958 do { 959 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 960 SCREWUP("lost connection"); 961 *cp++ = ch; 962 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 963 *cp = 0; 964 if (verbose_mode) 965 fmprintf(stderr, "Sink: %s", buf); 966 967 if (buf[0] == '\01' || buf[0] == '\02') { 968 if (iamremote == 0) { 969 (void) snmprintf(visbuf, sizeof(visbuf), 970 NULL, "%s", buf + 1); 971 (void) atomicio(vwrite, STDERR_FILENO, 972 visbuf, strlen(visbuf)); 973 } 974 if (buf[0] == '\02') 975 exit(1); 976 ++errs; 977 continue; 978 } 979 if (buf[0] == 'E') { 980 (void) atomicio(vwrite, remout, empty, 1); 981 return; 982 } 983 if (ch == '\n') 984 *--cp = 0; 985 986 cp = buf; 987 if (*cp == 'T') { 988 setimes++; 989 cp++; 990 if (!isdigit((unsigned char)*cp)) 991 SCREWUP("mtime.sec not present"); 992 ull = strtoull(cp, &cp, 10); 993 if (!cp || *cp++ != ' ') 994 SCREWUP("mtime.sec not delimited"); 995 if ((time_t)ull < 0 || 996 (unsigned long long)(time_t)ull != ull) 997 setimes = 0; /* out of range */ 998 mtime.tv_sec = ull; 999 mtime.tv_usec = strtol(cp, &cp, 10); 1000 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1001 mtime.tv_usec > 999999) 1002 SCREWUP("mtime.usec not delimited"); 1003 if (!isdigit((unsigned char)*cp)) 1004 SCREWUP("atime.sec not present"); 1005 ull = strtoull(cp, &cp, 10); 1006 if (!cp || *cp++ != ' ') 1007 SCREWUP("atime.sec not delimited"); 1008 if ((time_t)ull < 0 || 1009 (unsigned long long)(time_t)ull != ull) 1010 setimes = 0; /* out of range */ 1011 atime.tv_sec = ull; 1012 atime.tv_usec = strtol(cp, &cp, 10); 1013 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1014 atime.tv_usec > 999999) 1015 SCREWUP("atime.usec not delimited"); 1016 (void) atomicio(vwrite, remout, empty, 1); 1017 continue; 1018 } 1019 if (*cp != 'C' && *cp != 'D') { 1020 /* 1021 * Check for the case "rcp remote:foo\* local:bar". 1022 * In this case, the line "No match." can be returned 1023 * by the shell before the rcp command on the remote is 1024 * executed so the ^Aerror_message convention isn't 1025 * followed. 1026 */ 1027 if (first) { 1028 run_err("%s", cp); 1029 exit(1); 1030 } 1031 SCREWUP("expected control record"); 1032 } 1033 mode = 0; 1034 for (++cp; cp < buf + 5; cp++) { 1035 if (*cp < '0' || *cp > '7') 1036 SCREWUP("bad mode"); 1037 mode = (mode << 3) | (*cp - '0'); 1038 } 1039 if (*cp++ != ' ') 1040 SCREWUP("mode not delimited"); 1041 1042 for (size = 0; isdigit((unsigned char)*cp);) 1043 size = size * 10 + (*cp++ - '0'); 1044 if (*cp++ != ' ') 1045 SCREWUP("size not delimited"); 1046 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1047 run_err("error: unexpected filename: %s", cp); 1048 exit(1); 1049 } 1050 if (targisdir) { 1051 static char *namebuf; 1052 static size_t cursize; 1053 size_t need; 1054 1055 need = strlen(targ) + strlen(cp) + 250; 1056 if (need > cursize) { 1057 free(namebuf); 1058 namebuf = xmalloc(need); 1059 cursize = need; 1060 } 1061 (void) snprintf(namebuf, need, "%s%s%s", targ, 1062 strcmp(targ, "/") ? "/" : "", cp); 1063 np = namebuf; 1064 } else 1065 np = targ; 1066 curfile = cp; 1067 exists = stat(np, &stb) == 0; 1068 if (buf[0] == 'D') { 1069 int mod_flag = pflag; 1070 if (!iamrecursive) 1071 SCREWUP("received directory without -r"); 1072 if (exists) { 1073 if (!S_ISDIR(stb.st_mode)) { 1074 errno = ENOTDIR; 1075 goto bad; 1076 } 1077 if (pflag) 1078 (void) chmod(np, mode); 1079 } else { 1080 /* Handle copying from a read-only 1081 directory */ 1082 mod_flag = 1; 1083 if (mkdir(np, mode | S_IRWXU) < 0) 1084 goto bad; 1085 } 1086 vect[0] = xstrdup(np); 1087 sink(1, vect); 1088 if (setimes) { 1089 setimes = 0; 1090 if (utimes(vect[0], tv) < 0) 1091 run_err("%s: set times: %s", 1092 vect[0], strerror(errno)); 1093 } 1094 if (mod_flag) 1095 (void) chmod(vect[0], mode); 1096 free(vect[0]); 1097 continue; 1098 } 1099 omode = mode; 1100 mode |= S_IWUSR; 1101 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1102 bad: run_err("%s: %s", np, strerror(errno)); 1103 continue; 1104 } 1105 (void) atomicio(vwrite, remout, empty, 1); 1106 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1107 (void) close(ofd); 1108 continue; 1109 } 1110 cp = bp->buf; 1111 wrerr = NO; 1112 1113 statbytes = 0; 1114 if (showprogress) 1115 start_progress_meter(curfile, size, &statbytes); 1116 set_nonblock(remin); 1117 for (count = i = 0; i < size; i += bp->cnt) { 1118 amt = bp->cnt; 1119 if (i + amt > size) 1120 amt = size - i; 1121 count += amt; 1122 do { 1123 j = atomicio6(read, remin, cp, amt, 1124 scpio, &statbytes); 1125 if (j == 0) { 1126 run_err("%s", j != EPIPE ? 1127 strerror(errno) : 1128 "dropped connection"); 1129 exit(1); 1130 } 1131 amt -= j; 1132 cp += j; 1133 } while (amt > 0); 1134 1135 if (count == bp->cnt) { 1136 /* Keep reading so we stay sync'd up. */ 1137 if (wrerr == NO) { 1138 if (atomicio(vwrite, ofd, bp->buf, 1139 count) != count) { 1140 wrerr = YES; 1141 wrerrno = errno; 1142 } 1143 } 1144 count = 0; 1145 cp = bp->buf; 1146 } 1147 } 1148 unset_nonblock(remin); 1149 if (count != 0 && wrerr == NO && 1150 atomicio(vwrite, ofd, bp->buf, count) != count) { 1151 wrerr = YES; 1152 wrerrno = errno; 1153 } 1154 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1155 ftruncate(ofd, size) != 0) { 1156 run_err("%s: truncate: %s", np, strerror(errno)); 1157 wrerr = DISPLAYED; 1158 } 1159 if (pflag) { 1160 if (exists || omode != mode) 1161 if (fchmod(ofd, omode)) { 1162 run_err("%s: set mode: %s", 1163 np, strerror(errno)); 1164 wrerr = DISPLAYED; 1165 } 1166 } else { 1167 if (!exists && omode != mode) 1168 if (fchmod(ofd, omode & ~mask)) { 1169 run_err("%s: set mode: %s", 1170 np, strerror(errno)); 1171 wrerr = DISPLAYED; 1172 } 1173 } 1174 if (close(ofd) == -1) { 1175 wrerr = YES; 1176 wrerrno = errno; 1177 } 1178 (void) response(); 1179 if (showprogress) 1180 stop_progress_meter(); 1181 if (setimes && wrerr == NO) { 1182 setimes = 0; 1183 if (utimes(np, tv) < 0) { 1184 run_err("%s: set times: %s", 1185 np, strerror(errno)); 1186 wrerr = DISPLAYED; 1187 } 1188 } 1189 switch (wrerr) { 1190 case YES: 1191 run_err("%s: %s", np, strerror(wrerrno)); 1192 break; 1193 case NO: 1194 (void) atomicio(vwrite, remout, empty, 1); 1195 break; 1196 case DISPLAYED: 1197 break; 1198 } 1199 } 1200 screwup: 1201 run_err("protocol error: %s", why); 1202 exit(1); 1203 } 1204 1205 int 1206 response(void) 1207 { 1208 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1209 1210 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1211 lostconn(0); 1212 1213 cp = rbuf; 1214 switch (resp) { 1215 case 0: /* ok */ 1216 return (0); 1217 default: 1218 *cp++ = resp; 1219 /* FALLTHROUGH */ 1220 case 1: /* error, followed by error msg */ 1221 case 2: /* fatal error, "" */ 1222 do { 1223 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1224 lostconn(0); 1225 *cp++ = ch; 1226 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1227 1228 if (!iamremote) { 1229 cp[-1] = '\0'; 1230 (void) snmprintf(visbuf, sizeof(visbuf), 1231 NULL, "%s\n", rbuf); 1232 (void) atomicio(vwrite, STDERR_FILENO, 1233 visbuf, strlen(visbuf)); 1234 } 1235 ++errs; 1236 if (resp == 1) 1237 return (-1); 1238 exit(1); 1239 } 1240 /* NOTREACHED */ 1241 } 1242 1243 void 1244 usage(void) 1245 { 1246 (void) fprintf(stderr, 1247 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1248 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1249 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1250 exit(1); 1251 } 1252 1253 void 1254 run_err(const char *fmt,...) 1255 { 1256 static FILE *fp; 1257 va_list ap; 1258 1259 ++errs; 1260 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1261 (void) fprintf(fp, "%c", 0x01); 1262 (void) fprintf(fp, "scp: "); 1263 va_start(ap, fmt); 1264 (void) vfprintf(fp, fmt, ap); 1265 va_end(ap); 1266 (void) fprintf(fp, "\n"); 1267 (void) fflush(fp); 1268 } 1269 1270 if (!iamremote) { 1271 va_start(ap, fmt); 1272 vfmprintf(stderr, fmt, ap); 1273 va_end(ap); 1274 fprintf(stderr, "\n"); 1275 } 1276 } 1277 1278 void 1279 verifydir(char *cp) 1280 { 1281 struct stat stb; 1282 1283 if (!stat(cp, &stb)) { 1284 if (S_ISDIR(stb.st_mode)) 1285 return; 1286 errno = ENOTDIR; 1287 } 1288 run_err("%s: %s", cp, strerror(errno)); 1289 killchild(0); 1290 } 1291 1292 int 1293 okname(char *cp0) 1294 { 1295 int c; 1296 char *cp; 1297 1298 cp = cp0; 1299 do { 1300 c = (int)*cp; 1301 if (c & 0200) 1302 goto bad; 1303 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1304 switch (c) { 1305 case '\'': 1306 case '"': 1307 case '`': 1308 case ' ': 1309 case '#': 1310 goto bad; 1311 default: 1312 break; 1313 } 1314 } 1315 } while (*++cp); 1316 return (1); 1317 1318 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1319 return (0); 1320 } 1321 1322 BUF * 1323 allocbuf(BUF *bp, int fd, int blksize) 1324 { 1325 size_t size; 1326 struct stat stb; 1327 1328 if (fstat(fd, &stb) < 0) { 1329 run_err("fstat: %s", strerror(errno)); 1330 return (0); 1331 } 1332 size = ROUNDUP(stb.st_blksize, blksize); 1333 if (size == 0) 1334 size = blksize; 1335 if (bp->cnt >= size) 1336 return (bp); 1337 if (bp->buf == NULL) 1338 bp->buf = xmalloc(size); 1339 else 1340 bp->buf = xreallocarray(bp->buf, 1, size); 1341 memset(bp->buf, 0, size); 1342 bp->cnt = size; 1343 return (bp); 1344 } 1345 1346 static void 1347 lostconn(int signo) 1348 { 1349 if (!iamremote) 1350 (void)write(STDERR_FILENO, "lost connection\n", 16); 1351 if (signo) 1352 _exit(1); 1353 else 1354 exit(1); 1355 } 1356