1 /* $NetBSD: scp.c,v 1.14 2016/08/02 13:45:12 christos Exp $ */ 2 /* $OpenBSD: scp.c,v 1.186 2016/05/25 23:48:45 schwarze Exp $ */ 3 /* 4 * scp - secure remote copy. This is basically patched BSD rcp which 5 * uses ssh to do the data transfer (instead of using rcmd). 6 * 7 * NOTE: This version should NOT be suid root. (This uses ssh to 8 * do the transfer and ssh has the necessary privileges.) 9 * 10 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 11 * 12 * As far as I am concerned, the code I have written for this software 13 * can be used freely for any purpose. Any derived versions of this 14 * software must be clearly marked as such, and if the derived work is 15 * incompatible with the protocol description in the RFC file, it must be 16 * called by a name other than "ssh" or "Secure Shell". 17 */ 18 /* 19 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 20 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 32 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 34 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 40 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Parts from: 45 * 46 * Copyright (c) 1983, 1990, 1992, 1993, 1995 47 * The Regents of the University of California. All rights reserved. 48 * 49 * Redistribution and use in source and binary forms, with or without 50 * modification, are permitted provided that the following conditions 51 * are met: 52 * 1. Redistributions of source code must retain the above copyright 53 * notice, this list of conditions and the following disclaimer. 54 * 2. Redistributions in binary form must reproduce the above copyright 55 * notice, this list of conditions and the following disclaimer in the 56 * documentation and/or other materials provided with the distribution. 57 * 3. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 */ 74 75 #include "includes.h" 76 __RCSID("$NetBSD: scp.c,v 1.14 2016/08/02 13:45:12 christos Exp $"); 77 #include <sys/param.h> /* roundup MAX */ 78 #include <sys/types.h> 79 #include <sys/poll.h> 80 #include <sys/wait.h> 81 #include <sys/stat.h> 82 #include <sys/time.h> 83 #include <sys/uio.h> 84 85 #include <ctype.h> 86 #include <dirent.h> 87 #include <errno.h> 88 #include <fcntl.h> 89 #include <locale.h> 90 #include <pwd.h> 91 #include <signal.h> 92 #include <stdarg.h> 93 #include <stdio.h> 94 #include <stdlib.h> 95 #include <string.h> 96 #include <time.h> 97 #include <unistd.h> 98 #include <limits.h> 99 #include <vis.h> 100 101 #include "xmalloc.h" 102 #include "atomicio.h" 103 #include "pathnames.h" 104 #include "log.h" 105 #include "misc.h" 106 #include "progressmeter.h" 107 #include "utf8.h" 108 109 #define COPY_BUFLEN 16384 110 111 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 112 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 113 114 static char dot[] = "."; 115 static char empty[] = ""; 116 117 /* Struct for addargs */ 118 arglist args; 119 arglist remote_remote_args; 120 121 /* Bandwidth limit */ 122 long long limit_kbps = 0; 123 struct bwlimit bwlimit; 124 125 /* Name of current file being transferred. */ 126 char *curfile; 127 128 /* This is set to non-zero to enable verbose mode. */ 129 int verbose_mode = 0; 130 131 /* This is set to zero if the progressmeter is not desired. */ 132 int showprogress = 1; 133 134 /* 135 * This is set to non-zero if remote-remote copy should be piped 136 * through this process. 137 */ 138 int throughlocal = 0; 139 140 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 141 #ifdef RESCUEDIR 142 const char *ssh_program = RESCUEDIR "/ssh"; 143 #else 144 const char *ssh_program = _PATH_SSH_PROGRAM; 145 #endif 146 147 /* This is used to store the pid of ssh_program */ 148 pid_t do_cmd_pid = -1; 149 150 __dead static void 151 killchild(int signo) 152 { 153 if (do_cmd_pid > 1) { 154 kill(do_cmd_pid, signo ? signo : SIGTERM); 155 waitpid(do_cmd_pid, NULL, 0); 156 } 157 158 if (signo) 159 _exit(1); 160 exit(1); 161 } 162 163 static void 164 suspchild(int signo) 165 { 166 int status; 167 168 if (do_cmd_pid > 1) { 169 kill(do_cmd_pid, signo); 170 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 171 errno == EINTR) 172 ; 173 kill(getpid(), SIGSTOP); 174 } 175 } 176 177 static int 178 do_local_cmd(arglist *a) 179 { 180 u_int i; 181 int status; 182 pid_t pid; 183 184 if (a->num == 0) 185 fatal("do_local_cmd: no arguments"); 186 187 if (verbose_mode) { 188 fprintf(stderr, "Executing:"); 189 for (i = 0; i < a->num; i++) 190 fmprintf(stderr, " %s", a->list[i]); 191 fprintf(stderr, "\n"); 192 } 193 if ((pid = fork()) == -1) 194 fatal("do_local_cmd: fork: %s", strerror(errno)); 195 196 if (pid == 0) { 197 execvp(a->list[0], a->list); 198 perror(a->list[0]); 199 exit(1); 200 } 201 202 do_cmd_pid = pid; 203 signal(SIGTERM, killchild); 204 signal(SIGINT, killchild); 205 signal(SIGHUP, killchild); 206 207 while (waitpid(pid, &status, 0) == -1) 208 if (errno != EINTR) 209 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 210 211 do_cmd_pid = -1; 212 213 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 214 return (-1); 215 216 return (0); 217 } 218 219 /* 220 * This function executes the given command as the specified user on the 221 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 222 * assigns the input and output file descriptors on success. 223 */ 224 225 int 226 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 227 { 228 int pin[2], pout[2], reserved[2]; 229 230 if (verbose_mode) 231 fmprintf(stderr, 232 "Executing: program %s host %s, user %s, command %s\n", 233 ssh_program, host, 234 remuser ? remuser : "(unspecified)", cmd); 235 236 /* 237 * Reserve two descriptors so that the real pipes won't get 238 * descriptors 0 and 1 because that will screw up dup2 below. 239 */ 240 if (pipe(reserved) < 0) 241 fatal("pipe: %s", strerror(errno)); 242 243 /* Create a socket pair for communicating with ssh. */ 244 if (pipe(pin) < 0) 245 fatal("pipe: %s", strerror(errno)); 246 if (pipe(pout) < 0) 247 fatal("pipe: %s", strerror(errno)); 248 249 /* Free the reserved descriptors. */ 250 close(reserved[0]); 251 close(reserved[1]); 252 253 signal(SIGTSTP, suspchild); 254 signal(SIGTTIN, suspchild); 255 signal(SIGTTOU, suspchild); 256 257 /* Fork a child to execute the command on the remote host using ssh. */ 258 do_cmd_pid = fork(); 259 if (do_cmd_pid == 0) { 260 /* Child. */ 261 close(pin[1]); 262 close(pout[0]); 263 dup2(pin[0], 0); 264 dup2(pout[1], 1); 265 close(pin[0]); 266 close(pout[1]); 267 268 replacearg(&args, 0, "%s", ssh_program); 269 if (remuser != NULL) { 270 addargs(&args, "-l"); 271 addargs(&args, "%s", remuser); 272 } 273 addargs(&args, "--"); 274 addargs(&args, "%s", host); 275 addargs(&args, "%s", cmd); 276 277 execvp(ssh_program, args.list); 278 perror(ssh_program); 279 exit(1); 280 } else if (do_cmd_pid == -1) { 281 fatal("fork: %s", strerror(errno)); 282 } 283 /* Parent. Close the other side, and return the local side. */ 284 close(pin[0]); 285 *fdout = pin[1]; 286 close(pout[1]); 287 *fdin = pout[0]; 288 signal(SIGTERM, killchild); 289 signal(SIGINT, killchild); 290 signal(SIGHUP, killchild); 291 return 0; 292 } 293 294 /* 295 * This functions executes a command simlar to do_cmd(), but expects the 296 * input and output descriptors to be setup by a previous call to do_cmd(). 297 * This way the input and output of two commands can be connected. 298 */ 299 int 300 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 301 { 302 pid_t pid; 303 int status; 304 305 if (verbose_mode) 306 fmprintf(stderr, 307 "Executing: 2nd program %s host %s, user %s, command %s\n", 308 ssh_program, host, 309 remuser ? remuser : "(unspecified)", cmd); 310 311 /* Fork a child to execute the command on the remote host using ssh. */ 312 pid = fork(); 313 if (pid == 0) { 314 dup2(fdin, 0); 315 dup2(fdout, 1); 316 317 replacearg(&args, 0, "%s", ssh_program); 318 if (remuser != NULL) { 319 addargs(&args, "-l"); 320 addargs(&args, "%s", remuser); 321 } 322 addargs(&args, "--"); 323 addargs(&args, "%s", host); 324 addargs(&args, "%s", cmd); 325 326 execvp(ssh_program, args.list); 327 perror(ssh_program); 328 exit(1); 329 } else if (pid == -1) { 330 fatal("fork: %s", strerror(errno)); 331 } 332 while (waitpid(pid, &status, 0) == -1) 333 if (errno != EINTR) 334 fatal("do_cmd2: waitpid: %s", strerror(errno)); 335 return 0; 336 } 337 338 typedef struct { 339 size_t cnt; 340 char *buf; 341 } BUF; 342 343 BUF *allocbuf(BUF *, int, int); 344 __dead static void lostconn(int); 345 int okname(char *); 346 void run_err(const char *,...) __printflike(1, 2); 347 void verifydir(char *); 348 349 struct passwd *pwd; 350 uid_t userid; 351 int errs, remin, remout; 352 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 353 354 #define CMDNEEDS 64 355 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 356 357 int response(void); 358 void rsource(char *, struct stat *); 359 void sink(int, char *[]); 360 void source(int, char *[]); 361 static void tolocal(int, char *[]); 362 static void toremote(char *, int, char *[]); 363 __dead static void usage(void); 364 365 int 366 main(int argc, char **argv) 367 { 368 int ch, fflag, tflag, status, n; 369 char *targ, **newargv; 370 const char *errstr; 371 extern char *optarg; 372 extern int optind; 373 374 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 375 sanitise_stdfd(); 376 377 setlocale(LC_CTYPE, ""); 378 379 /* Copy argv, because we modify it */ 380 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 381 for (n = 0; n < argc; n++) 382 newargv[n] = xstrdup(argv[n]); 383 argv = newargv; 384 385 memset(&args, '\0', sizeof(args)); 386 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 387 args.list = remote_remote_args.list = NULL; 388 addargs(&args, "%s", ssh_program); 389 addargs(&args, "-x"); 390 addargs(&args, "-oForwardAgent=no"); 391 addargs(&args, "-oPermitLocalCommand=no"); 392 addargs(&args, "-oClearAllForwardings=yes"); 393 394 fflag = tflag = 0; 395 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 396 switch (ch) { 397 /* User-visible flags. */ 398 case '1': 399 case '2': 400 case '4': 401 case '6': 402 case 'C': 403 addargs(&args, "-%c", ch); 404 addargs(&remote_remote_args, "-%c", ch); 405 break; 406 case '3': 407 throughlocal = 1; 408 break; 409 case 'o': 410 case 'c': 411 case 'i': 412 case 'F': 413 addargs(&remote_remote_args, "-%c", ch); 414 addargs(&remote_remote_args, "%s", optarg); 415 addargs(&args, "-%c", ch); 416 addargs(&args, "%s", optarg); 417 break; 418 case 'P': 419 addargs(&remote_remote_args, "-p"); 420 addargs(&remote_remote_args, "%s", optarg); 421 addargs(&args, "-p"); 422 addargs(&args, "%s", optarg); 423 break; 424 case 'B': 425 addargs(&remote_remote_args, "-oBatchmode=yes"); 426 addargs(&args, "-oBatchmode=yes"); 427 break; 428 case 'l': 429 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 430 &errstr); 431 if (errstr != NULL) 432 usage(); 433 limit_kbps *= 1024; /* kbps */ 434 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 435 break; 436 case 'p': 437 pflag = 1; 438 break; 439 case 'r': 440 iamrecursive = 1; 441 break; 442 case 'S': 443 ssh_program = xstrdup(optarg); 444 break; 445 case 'v': 446 addargs(&args, "-v"); 447 addargs(&remote_remote_args, "-v"); 448 verbose_mode = 1; 449 break; 450 case 'q': 451 addargs(&args, "-q"); 452 addargs(&remote_remote_args, "-q"); 453 showprogress = 0; 454 break; 455 456 /* Server options. */ 457 case 'd': 458 targetshouldbedirectory = 1; 459 break; 460 case 'f': /* "from" */ 461 iamremote = 1; 462 fflag = 1; 463 break; 464 case 't': /* "to" */ 465 iamremote = 1; 466 tflag = 1; 467 break; 468 default: 469 usage(); 470 } 471 argc -= optind; 472 argv += optind; 473 474 if ((pwd = getpwuid(userid = getuid())) == NULL) 475 fatal("unknown user %u", (u_int) userid); 476 477 if (!isatty(STDOUT_FILENO)) 478 showprogress = 0; 479 480 if (pflag) { 481 /* Cannot pledge: -p allows setuid/setgid files... */ 482 } else { 483 #ifdef __OpenBSD__ 484 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 485 NULL) == -1) { 486 perror("pledge"); 487 exit(1); 488 } 489 #endif 490 } 491 492 remin = STDIN_FILENO; 493 remout = STDOUT_FILENO; 494 495 if (fflag) { 496 /* Follow "protocol", send data. */ 497 (void) response(); 498 source(argc, argv); 499 exit(errs != 0); 500 } 501 if (tflag) { 502 /* Receive data. */ 503 sink(argc, argv); 504 exit(errs != 0); 505 } 506 if (argc < 2) 507 usage(); 508 if (argc > 2) 509 targetshouldbedirectory = 1; 510 511 remin = remout = -1; 512 do_cmd_pid = -1; 513 /* Command to be executed on remote system using "ssh". */ 514 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 515 verbose_mode ? " -v" : "", 516 iamrecursive ? " -r" : "", pflag ? " -p" : "", 517 targetshouldbedirectory ? " -d" : ""); 518 519 (void) signal(SIGPIPE, lostconn); 520 521 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 522 toremote(targ, argc, argv); 523 else { 524 if (targetshouldbedirectory) 525 verifydir(argv[argc - 1]); 526 tolocal(argc, argv); /* Dest is local host. */ 527 } 528 /* 529 * Finally check the exit status of the ssh process, if one was forked 530 * and no error has occurred yet 531 */ 532 if (do_cmd_pid != -1 && errs == 0) { 533 if (remin != -1) 534 (void) close(remin); 535 if (remout != -1) 536 (void) close(remout); 537 if (waitpid(do_cmd_pid, &status, 0) == -1) 538 errs = 1; 539 else { 540 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 541 errs = 1; 542 } 543 } 544 exit(errs != 0); 545 } 546 547 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 548 static int 549 scpio(void *_cnt, size_t s) 550 { 551 off_t *cnt = (off_t *)_cnt; 552 553 *cnt += s; 554 if (limit_kbps > 0) 555 bandwidth_limit(&bwlimit, s); 556 return 0; 557 } 558 559 static int 560 do_times(int fd, int verb, const struct stat *sb) 561 { 562 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 563 char buf[(20 + 7 + 2) * 2 + 2]; 564 565 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 566 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 567 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 568 if (verb) { 569 fprintf(stderr, "File mtime %lld atime %lld\n", 570 (long long)sb->st_mtime, (long long)sb->st_atime); 571 fprintf(stderr, "Sending file timestamps: %s", buf); 572 } 573 (void) atomicio(vwrite, fd, buf, strlen(buf)); 574 return (response()); 575 } 576 577 void 578 toremote(char *targ, int argc, char **argv) 579 { 580 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 581 arglist alist; 582 int i; 583 u_int j; 584 585 memset(&alist, '\0', sizeof(alist)); 586 alist.list = NULL; 587 588 *targ++ = 0; 589 if (*targ == 0) 590 targ = dot; 591 592 arg = xstrdup(argv[argc - 1]); 593 if ((thost = strrchr(arg, '@'))) { 594 /* user@host */ 595 *thost++ = 0; 596 tuser = arg; 597 if (*tuser == '\0') 598 tuser = NULL; 599 } else { 600 thost = arg; 601 tuser = NULL; 602 } 603 604 if (tuser != NULL && !okname(tuser)) { 605 free(arg); 606 return; 607 } 608 609 for (i = 0; i < argc - 1; i++) { 610 src = colon(argv[i]); 611 if (src && throughlocal) { /* extended remote to remote */ 612 *src++ = 0; 613 if (*src == 0) 614 src = dot; 615 host = strrchr(argv[i], '@'); 616 if (host) { 617 *host++ = 0; 618 host = cleanhostname(host); 619 suser = argv[i]; 620 if (*suser == '\0') 621 suser = pwd->pw_name; 622 else if (!okname(suser)) 623 continue; 624 } else { 625 host = cleanhostname(argv[i]); 626 suser = NULL; 627 } 628 xasprintf(&bp, "%s -f %s%s", cmd, 629 *src == '-' ? "-- " : "", src); 630 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 631 exit(1); 632 free(bp); 633 host = cleanhostname(thost); 634 xasprintf(&bp, "%s -t %s%s", cmd, 635 *targ == '-' ? "-- " : "", targ); 636 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 637 exit(1); 638 free(bp); 639 (void) close(remin); 640 (void) close(remout); 641 remin = remout = -1; 642 } else if (src) { /* standard remote to remote */ 643 freeargs(&alist); 644 addargs(&alist, "%s", ssh_program); 645 addargs(&alist, "-x"); 646 addargs(&alist, "-oClearAllForwardings=yes"); 647 addargs(&alist, "-n"); 648 for (j = 0; j < remote_remote_args.num; j++) { 649 addargs(&alist, "%s", 650 remote_remote_args.list[j]); 651 } 652 *src++ = 0; 653 if (*src == 0) 654 src = dot; 655 host = strrchr(argv[i], '@'); 656 657 if (host) { 658 *host++ = 0; 659 host = cleanhostname(host); 660 suser = argv[i]; 661 if (*suser == '\0') 662 suser = pwd->pw_name; 663 else if (!okname(suser)) 664 continue; 665 addargs(&alist, "-l"); 666 addargs(&alist, "%s", suser); 667 } else { 668 host = cleanhostname(argv[i]); 669 } 670 addargs(&alist, "--"); 671 addargs(&alist, "%s", host); 672 addargs(&alist, "%s", cmd); 673 addargs(&alist, "%s", src); 674 addargs(&alist, "%s%s%s:%s", 675 tuser ? tuser : "", tuser ? "@" : "", 676 thost, targ); 677 if (do_local_cmd(&alist) != 0) 678 errs = 1; 679 } else { /* local to remote */ 680 if (remin == -1) { 681 xasprintf(&bp, "%s -t %s%s", cmd, 682 *targ == '-' ? "-- " : "", targ); 683 host = cleanhostname(thost); 684 if (do_cmd(host, tuser, bp, &remin, 685 &remout) < 0) 686 exit(1); 687 if (response() < 0) 688 exit(1); 689 free(bp); 690 } 691 source(1, argv + i); 692 } 693 } 694 free(arg); 695 } 696 697 static void 698 tolocal(int argc, char **argv) 699 { 700 char *bp, *host, *src, *suser; 701 arglist alist; 702 int i; 703 704 memset(&alist, '\0', sizeof(alist)); 705 alist.list = NULL; 706 707 for (i = 0; i < argc - 1; i++) { 708 if (!(src = colon(argv[i]))) { /* Local to local. */ 709 freeargs(&alist); 710 addargs(&alist, "%s", _PATH_CP); 711 if (iamrecursive) 712 addargs(&alist, "-r"); 713 if (pflag) 714 addargs(&alist, "-p"); 715 addargs(&alist, "--"); 716 addargs(&alist, "%s", argv[i]); 717 addargs(&alist, "%s", argv[argc-1]); 718 if (do_local_cmd(&alist)) 719 ++errs; 720 continue; 721 } 722 *src++ = 0; 723 if (*src == 0) 724 src = dot; 725 if ((host = strrchr(argv[i], '@')) == NULL) { 726 host = argv[i]; 727 suser = NULL; 728 } else { 729 *host++ = 0; 730 suser = argv[i]; 731 if (*suser == '\0') 732 suser = pwd->pw_name; 733 } 734 host = cleanhostname(host); 735 xasprintf(&bp, "%s -f %s%s", 736 cmd, *src == '-' ? "-- " : "", src); 737 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 738 free(bp); 739 ++errs; 740 continue; 741 } 742 free(bp); 743 sink(1, argv + argc - 1); 744 (void) close(remin); 745 remin = remout = -1; 746 } 747 } 748 749 void 750 source(int argc, char **argv) 751 { 752 struct stat stb; 753 static BUF buffer; 754 BUF *bp; 755 off_t i, statbytes; 756 size_t amt, nr; 757 int fd = -1, haderr, indx; 758 char *last, *name, buf[16384], encname[PATH_MAX]; 759 int len; 760 761 for (indx = 0; indx < argc; ++indx) { 762 fd = -1; 763 name = argv[indx]; 764 statbytes = 0; 765 len = strlen(name); 766 while (len > 1 && name[len-1] == '/') 767 name[--len] = '\0'; 768 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 769 goto syserr; 770 if (strchr(name, '\n') != NULL) { 771 strvisx(encname, name, len, VIS_NL); 772 name = encname; 773 } 774 if (fstat(fd, &stb) < 0) { 775 syserr: run_err("%s: %s", name, strerror(errno)); 776 goto next; 777 } 778 if (stb.st_size < 0) { 779 run_err("%s: %s", name, "Negative file size"); 780 goto next; 781 } 782 unset_nonblock(fd); 783 switch (stb.st_mode & S_IFMT) { 784 case S_IFREG: 785 break; 786 case S_IFDIR: 787 if (iamrecursive) { 788 rsource(name, &stb); 789 goto next; 790 } 791 /* FALLTHROUGH */ 792 default: 793 run_err("%s: not a regular file", name); 794 goto next; 795 } 796 if ((last = strrchr(name, '/')) == NULL) 797 last = name; 798 else 799 ++last; 800 curfile = last; 801 if (pflag) { 802 if (do_times(remout, verbose_mode, &stb) < 0) 803 goto next; 804 } 805 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 806 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 807 (u_int) (stb.st_mode & FILEMODEMASK), 808 (long long)stb.st_size, last); 809 if (verbose_mode) 810 fmprintf(stderr, "Sending file modes: %s", buf); 811 (void) atomicio(vwrite, remout, buf, strlen(buf)); 812 if (response() < 0) 813 goto next; 814 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 815 next: if (fd != -1) { 816 (void) close(fd); 817 fd = -1; 818 } 819 continue; 820 } 821 if (showprogress) 822 start_progress_meter(curfile, stb.st_size, &statbytes); 823 set_nonblock(remout); 824 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 825 amt = bp->cnt; 826 if (i + (off_t)amt > stb.st_size) 827 amt = stb.st_size - i; 828 if (!haderr) { 829 if ((nr = atomicio(read, fd, 830 bp->buf, amt)) != amt) { 831 haderr = errno; 832 memset(bp->buf + nr, 0, amt - nr); 833 } 834 } 835 /* Keep writing after error to retain sync */ 836 if (haderr) { 837 (void)atomicio(vwrite, remout, bp->buf, amt); 838 memset(bp->buf, 0, amt); 839 continue; 840 } 841 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 842 &statbytes) != amt) 843 haderr = errno; 844 } 845 unset_nonblock(remout); 846 847 if (fd != -1) { 848 if (close(fd) < 0 && !haderr) 849 haderr = errno; 850 fd = -1; 851 } 852 if (!haderr) 853 (void) atomicio(vwrite, remout, empty, 1); 854 else 855 run_err("%s: %s", name, strerror(haderr)); 856 (void) response(); 857 if (showprogress) 858 stop_progress_meter(); 859 } 860 } 861 862 void 863 rsource(char *name, struct stat *statp) 864 { 865 DIR *dirp; 866 struct dirent *dp; 867 char *last, *vect[1], path[PATH_MAX]; 868 869 if (!(dirp = opendir(name))) { 870 run_err("%s: %s", name, strerror(errno)); 871 return; 872 } 873 last = strrchr(name, '/'); 874 if (last == NULL) 875 last = name; 876 else 877 last++; 878 if (pflag) { 879 if (do_times(remout, verbose_mode, statp) < 0) { 880 closedir(dirp); 881 return; 882 } 883 } 884 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 885 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 886 if (verbose_mode) 887 fmprintf(stderr, "Entering directory: %s", path); 888 (void) atomicio(vwrite, remout, path, strlen(path)); 889 if (response() < 0) { 890 closedir(dirp); 891 return; 892 } 893 while ((dp = readdir(dirp)) != NULL) { 894 if (dp->d_ino == 0) 895 continue; 896 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 897 continue; 898 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 899 run_err("%s/%s: name too long", name, dp->d_name); 900 continue; 901 } 902 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 903 vect[0] = path; 904 source(1, vect); 905 } 906 (void) closedir(dirp); 907 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 908 (void) response(); 909 } 910 911 void 912 sink(int argc, char **argv) 913 { 914 static BUF buffer; 915 struct stat stb; 916 enum { 917 YES, NO, DISPLAYED 918 } wrerr; 919 BUF *bp; 920 off_t i; 921 size_t j, count; 922 int amt, exists, first, ofd; 923 mode_t mode, omode, mask; 924 off_t size, statbytes; 925 unsigned long long ull; 926 int setimes, targisdir, wrerrno = 0; 927 char ch, *cp, *np, *targ, *vect[1], buf[2048], visbuf[2048]; 928 const char *why; 929 struct timeval tv[2]; 930 931 #define atime tv[0] 932 #define mtime tv[1] 933 #define SCREWUP(str) { why = str; goto screwup; } 934 935 setimes = targisdir = 0; 936 mask = umask(0); 937 if (!pflag) 938 (void) umask(mask); 939 if (argc != 1) { 940 run_err("ambiguous target"); 941 exit(1); 942 } 943 targ = *argv; 944 if (targetshouldbedirectory) 945 verifydir(targ); 946 947 (void) atomicio(vwrite, remout, empty, 1); 948 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 949 targisdir = 1; 950 for (first = 1;; first = 0) { 951 cp = buf; 952 if (atomicio(read, remin, cp, 1) != 1) 953 return; 954 if (*cp++ == '\n') 955 SCREWUP("unexpected <newline>"); 956 do { 957 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 958 SCREWUP("lost connection"); 959 *cp++ = ch; 960 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 961 *cp = 0; 962 if (verbose_mode) 963 fmprintf(stderr, "Sink: %s", buf); 964 965 if (buf[0] == '\01' || buf[0] == '\02') { 966 if (iamremote == 0) { 967 (void) snmprintf(visbuf, sizeof(visbuf), 968 NULL, "%s", buf + 1); 969 (void) atomicio(vwrite, STDERR_FILENO, 970 visbuf, strlen(visbuf)); 971 } 972 if (buf[0] == '\02') 973 exit(1); 974 ++errs; 975 continue; 976 } 977 if (buf[0] == 'E') { 978 (void) atomicio(vwrite, remout, empty, 1); 979 return; 980 } 981 if (ch == '\n') 982 *--cp = 0; 983 984 cp = buf; 985 if (*cp == 'T') { 986 setimes++; 987 cp++; 988 if (!isdigit((unsigned char)*cp)) 989 SCREWUP("mtime.sec not present"); 990 ull = strtoull(cp, &cp, 10); 991 if (!cp || *cp++ != ' ') 992 SCREWUP("mtime.sec not delimited"); 993 if ((time_t)ull < 0 || 994 (unsigned long long)(time_t)ull != ull) 995 setimes = 0; /* out of range */ 996 mtime.tv_sec = ull; 997 mtime.tv_usec = strtol(cp, &cp, 10); 998 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 999 mtime.tv_usec > 999999) 1000 SCREWUP("mtime.usec not delimited"); 1001 if (!isdigit((unsigned char)*cp)) 1002 SCREWUP("atime.sec not present"); 1003 ull = strtoull(cp, &cp, 10); 1004 if (!cp || *cp++ != ' ') 1005 SCREWUP("atime.sec not delimited"); 1006 if ((time_t)ull < 0 || 1007 (unsigned long long)(time_t)ull != ull) 1008 setimes = 0; /* out of range */ 1009 atime.tv_sec = ull; 1010 atime.tv_usec = strtol(cp, &cp, 10); 1011 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1012 atime.tv_usec > 999999) 1013 SCREWUP("atime.usec not delimited"); 1014 (void) atomicio(vwrite, remout, empty, 1); 1015 continue; 1016 } 1017 if (*cp != 'C' && *cp != 'D') { 1018 /* 1019 * Check for the case "rcp remote:foo\* local:bar". 1020 * In this case, the line "No match." can be returned 1021 * by the shell before the rcp command on the remote is 1022 * executed so the ^Aerror_message convention isn't 1023 * followed. 1024 */ 1025 if (first) { 1026 run_err("%s", cp); 1027 exit(1); 1028 } 1029 SCREWUP("expected control record"); 1030 } 1031 mode = 0; 1032 for (++cp; cp < buf + 5; cp++) { 1033 if (*cp < '0' || *cp > '7') 1034 SCREWUP("bad mode"); 1035 mode = (mode << 3) | (*cp - '0'); 1036 } 1037 if (*cp++ != ' ') 1038 SCREWUP("mode not delimited"); 1039 1040 for (size = 0; isdigit((unsigned char)*cp);) 1041 size = size * 10 + (*cp++ - '0'); 1042 if (*cp++ != ' ') 1043 SCREWUP("size not delimited"); 1044 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1045 run_err("error: unexpected filename: %s", cp); 1046 exit(1); 1047 } 1048 if (targisdir) { 1049 static char *namebuf; 1050 static size_t cursize; 1051 size_t need; 1052 1053 need = strlen(targ) + strlen(cp) + 250; 1054 if (need > cursize) { 1055 free(namebuf); 1056 namebuf = xmalloc(need); 1057 cursize = need; 1058 } 1059 (void) snprintf(namebuf, need, "%s%s%s", targ, 1060 strcmp(targ, "/") ? "/" : "", cp); 1061 np = namebuf; 1062 } else 1063 np = targ; 1064 curfile = cp; 1065 exists = stat(np, &stb) == 0; 1066 if (buf[0] == 'D') { 1067 int mod_flag = pflag; 1068 if (!iamrecursive) 1069 SCREWUP("received directory without -r"); 1070 if (exists) { 1071 if (!S_ISDIR(stb.st_mode)) { 1072 errno = ENOTDIR; 1073 goto bad; 1074 } 1075 if (pflag) 1076 (void) chmod(np, mode); 1077 } else { 1078 /* Handle copying from a read-only 1079 directory */ 1080 mod_flag = 1; 1081 if (mkdir(np, mode | S_IRWXU) < 0) 1082 goto bad; 1083 } 1084 vect[0] = xstrdup(np); 1085 sink(1, vect); 1086 if (setimes) { 1087 setimes = 0; 1088 if (utimes(vect[0], tv) < 0) 1089 run_err("%s: set times: %s", 1090 vect[0], strerror(errno)); 1091 } 1092 if (mod_flag) 1093 (void) chmod(vect[0], mode); 1094 free(vect[0]); 1095 continue; 1096 } 1097 omode = mode; 1098 mode |= S_IWUSR; 1099 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1100 bad: run_err("%s: %s", np, strerror(errno)); 1101 continue; 1102 } 1103 (void) atomicio(vwrite, remout, empty, 1); 1104 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1105 (void) close(ofd); 1106 continue; 1107 } 1108 cp = bp->buf; 1109 wrerr = NO; 1110 1111 statbytes = 0; 1112 if (showprogress) 1113 start_progress_meter(curfile, size, &statbytes); 1114 set_nonblock(remin); 1115 for (count = i = 0; i < size; i += bp->cnt) { 1116 amt = bp->cnt; 1117 if (i + amt > size) 1118 amt = size - i; 1119 count += amt; 1120 do { 1121 j = atomicio6(read, remin, cp, amt, 1122 scpio, &statbytes); 1123 if (j == 0) { 1124 run_err("%s", j != EPIPE ? 1125 strerror(errno) : 1126 "dropped connection"); 1127 exit(1); 1128 } 1129 amt -= j; 1130 cp += j; 1131 } while (amt > 0); 1132 1133 if (count == bp->cnt) { 1134 /* Keep reading so we stay sync'd up. */ 1135 if (wrerr == NO) { 1136 if (atomicio(vwrite, ofd, bp->buf, 1137 count) != count) { 1138 wrerr = YES; 1139 wrerrno = errno; 1140 } 1141 } 1142 count = 0; 1143 cp = bp->buf; 1144 } 1145 } 1146 unset_nonblock(remin); 1147 if (count != 0 && wrerr == NO && 1148 atomicio(vwrite, ofd, bp->buf, count) != count) { 1149 wrerr = YES; 1150 wrerrno = errno; 1151 } 1152 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1153 ftruncate(ofd, size) != 0) { 1154 run_err("%s: truncate: %s", np, strerror(errno)); 1155 wrerr = DISPLAYED; 1156 } 1157 if (pflag) { 1158 if (exists || omode != mode) 1159 if (fchmod(ofd, omode)) { 1160 run_err("%s: set mode: %s", 1161 np, strerror(errno)); 1162 wrerr = DISPLAYED; 1163 } 1164 } else { 1165 if (!exists && omode != mode) 1166 if (fchmod(ofd, omode & ~mask)) { 1167 run_err("%s: set mode: %s", 1168 np, strerror(errno)); 1169 wrerr = DISPLAYED; 1170 } 1171 } 1172 if (close(ofd) == -1) { 1173 wrerr = YES; 1174 wrerrno = errno; 1175 } 1176 (void) response(); 1177 if (showprogress) 1178 stop_progress_meter(); 1179 if (setimes && wrerr == NO) { 1180 setimes = 0; 1181 if (utimes(np, tv) < 0) { 1182 run_err("%s: set times: %s", 1183 np, strerror(errno)); 1184 wrerr = DISPLAYED; 1185 } 1186 } 1187 switch (wrerr) { 1188 case YES: 1189 run_err("%s: %s", np, strerror(wrerrno)); 1190 break; 1191 case NO: 1192 (void) atomicio(vwrite, remout, empty, 1); 1193 break; 1194 case DISPLAYED: 1195 break; 1196 } 1197 } 1198 screwup: 1199 run_err("protocol error: %s", why); 1200 exit(1); 1201 } 1202 1203 int 1204 response(void) 1205 { 1206 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1207 1208 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1209 lostconn(0); 1210 1211 cp = rbuf; 1212 switch (resp) { 1213 case 0: /* ok */ 1214 return (0); 1215 default: 1216 *cp++ = resp; 1217 /* FALLTHROUGH */ 1218 case 1: /* error, followed by error msg */ 1219 case 2: /* fatal error, "" */ 1220 do { 1221 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1222 lostconn(0); 1223 *cp++ = ch; 1224 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1225 1226 if (!iamremote) { 1227 cp[-1] = '\0'; 1228 (void) snmprintf(visbuf, sizeof(visbuf), 1229 NULL, "%s\n", rbuf); 1230 (void) atomicio(vwrite, STDERR_FILENO, 1231 visbuf, strlen(visbuf)); 1232 } 1233 ++errs; 1234 if (resp == 1) 1235 return (-1); 1236 exit(1); 1237 } 1238 /* NOTREACHED */ 1239 } 1240 1241 void 1242 usage(void) 1243 { 1244 (void) fprintf(stderr, 1245 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1246 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1247 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1248 exit(1); 1249 } 1250 1251 void 1252 run_err(const char *fmt,...) 1253 { 1254 static FILE *fp; 1255 va_list ap; 1256 1257 ++errs; 1258 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1259 (void) fprintf(fp, "%c", 0x01); 1260 (void) fprintf(fp, "scp: "); 1261 va_start(ap, fmt); 1262 (void) vfprintf(fp, fmt, ap); 1263 va_end(ap); 1264 (void) fprintf(fp, "\n"); 1265 (void) fflush(fp); 1266 } 1267 1268 if (!iamremote) { 1269 va_start(ap, fmt); 1270 vfmprintf(stderr, fmt, ap); 1271 va_end(ap); 1272 fprintf(stderr, "\n"); 1273 } 1274 } 1275 1276 void 1277 verifydir(char *cp) 1278 { 1279 struct stat stb; 1280 1281 if (!stat(cp, &stb)) { 1282 if (S_ISDIR(stb.st_mode)) 1283 return; 1284 errno = ENOTDIR; 1285 } 1286 run_err("%s: %s", cp, strerror(errno)); 1287 killchild(0); 1288 } 1289 1290 int 1291 okname(char *cp0) 1292 { 1293 int c; 1294 char *cp; 1295 1296 cp = cp0; 1297 do { 1298 c = (int)*cp; 1299 if (c & 0200) 1300 goto bad; 1301 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1302 switch (c) { 1303 case '\'': 1304 case '"': 1305 case '`': 1306 case ' ': 1307 case '#': 1308 goto bad; 1309 default: 1310 break; 1311 } 1312 } 1313 } while (*++cp); 1314 return (1); 1315 1316 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1317 return (0); 1318 } 1319 1320 BUF * 1321 allocbuf(BUF *bp, int fd, int blksize) 1322 { 1323 size_t size; 1324 struct stat stb; 1325 1326 if (fstat(fd, &stb) < 0) { 1327 run_err("fstat: %s", strerror(errno)); 1328 return (0); 1329 } 1330 size = roundup(stb.st_blksize, blksize); 1331 if (size == 0) 1332 size = blksize; 1333 if (bp->cnt >= size) 1334 return (bp); 1335 if (bp->buf == NULL) 1336 bp->buf = xmalloc(size); 1337 else 1338 bp->buf = xreallocarray(bp->buf, 1, size); 1339 memset(bp->buf, 0, size); 1340 bp->cnt = size; 1341 return (bp); 1342 } 1343 1344 static void 1345 lostconn(int signo) 1346 { 1347 if (!iamremote) 1348 (void)write(STDERR_FILENO, "lost connection\n", 16); 1349 if (signo) 1350 _exit(1); 1351 else 1352 exit(1); 1353 } 1354