1 /* $OpenBSD: scp.c,v 1.184 2015/11/27 00:49:31 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 #include <sys/param.h> 78 #ifdef HAVE_SYS_STAT_H 79 # include <sys/stat.h> 80 #endif 81 #ifdef HAVE_POLL_H 82 #include <poll.h> 83 #else 84 # ifdef HAVE_SYS_POLL_H 85 # include <sys/poll.h> 86 # endif 87 #endif 88 #ifdef HAVE_SYS_TIME_H 89 # include <sys/time.h> 90 #endif 91 #include <sys/wait.h> 92 #include <sys/uio.h> 93 94 #include <ctype.h> 95 #include <dirent.h> 96 #include <errno.h> 97 #include <fcntl.h> 98 #include <limits.h> 99 #include <pwd.h> 100 #include <signal.h> 101 #include <stdarg.h> 102 #include <stdio.h> 103 #include <stdlib.h> 104 #include <string.h> 105 #include <time.h> 106 #include <unistd.h> 107 #if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) 108 #include <vis.h> 109 #endif 110 111 #include "xmalloc.h" 112 #include "atomicio.h" 113 #include "pathnames.h" 114 #include "log.h" 115 #include "misc.h" 116 #include "progressmeter.h" 117 118 extern char *__progname; 119 120 #define COPY_BUFLEN 16384 121 122 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 123 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 124 125 /* Struct for addargs */ 126 arglist args; 127 arglist remote_remote_args; 128 129 /* Bandwidth limit */ 130 long long limit_kbps = 0; 131 struct bwlimit bwlimit; 132 133 /* Name of current file being transferred. */ 134 char *curfile; 135 136 /* This is set to non-zero to enable verbose mode. */ 137 int verbose_mode = 0; 138 139 /* This is set to zero if the progressmeter is not desired. */ 140 int showprogress = 1; 141 142 /* 143 * This is set to non-zero if remote-remote copy should be piped 144 * through this process. 145 */ 146 int throughlocal = 0; 147 148 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 149 char *ssh_program = _PATH_SSH_PROGRAM; 150 151 /* This is used to store the pid of ssh_program */ 152 pid_t do_cmd_pid = -1; 153 154 static void 155 killchild(int signo) 156 { 157 if (do_cmd_pid > 1) { 158 kill(do_cmd_pid, signo ? signo : SIGTERM); 159 waitpid(do_cmd_pid, NULL, 0); 160 } 161 162 if (signo) 163 _exit(1); 164 exit(1); 165 } 166 167 static void 168 suspchild(int signo) 169 { 170 int status; 171 172 if (do_cmd_pid > 1) { 173 kill(do_cmd_pid, signo); 174 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 175 errno == EINTR) 176 ; 177 kill(getpid(), SIGSTOP); 178 } 179 } 180 181 static int 182 do_local_cmd(arglist *a) 183 { 184 u_int i; 185 int status; 186 pid_t pid; 187 188 if (a->num == 0) 189 fatal("do_local_cmd: no arguments"); 190 191 if (verbose_mode) { 192 fprintf(stderr, "Executing:"); 193 for (i = 0; i < a->num; i++) 194 fprintf(stderr, " %s", a->list[i]); 195 fprintf(stderr, "\n"); 196 } 197 if ((pid = fork()) == -1) 198 fatal("do_local_cmd: fork: %s", strerror(errno)); 199 200 if (pid == 0) { 201 execvp(a->list[0], a->list); 202 perror(a->list[0]); 203 exit(1); 204 } 205 206 do_cmd_pid = pid; 207 signal(SIGTERM, killchild); 208 signal(SIGINT, killchild); 209 signal(SIGHUP, killchild); 210 211 while (waitpid(pid, &status, 0) == -1) 212 if (errno != EINTR) 213 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 214 215 do_cmd_pid = -1; 216 217 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 218 return (-1); 219 220 return (0); 221 } 222 223 /* 224 * This function executes the given command as the specified user on the 225 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 226 * assigns the input and output file descriptors on success. 227 */ 228 229 int 230 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 231 { 232 int pin[2], pout[2], reserved[2]; 233 234 if (verbose_mode) 235 fprintf(stderr, 236 "Executing: program %s host %s, user %s, command %s\n", 237 ssh_program, host, 238 remuser ? remuser : "(unspecified)", cmd); 239 240 /* 241 * Reserve two descriptors so that the real pipes won't get 242 * descriptors 0 and 1 because that will screw up dup2 below. 243 */ 244 if (pipe(reserved) < 0) 245 fatal("pipe: %s", strerror(errno)); 246 247 /* Create a socket pair for communicating with ssh. */ 248 if (pipe(pin) < 0) 249 fatal("pipe: %s", strerror(errno)); 250 if (pipe(pout) < 0) 251 fatal("pipe: %s", strerror(errno)); 252 253 /* Free the reserved descriptors. */ 254 close(reserved[0]); 255 close(reserved[1]); 256 257 signal(SIGTSTP, suspchild); 258 signal(SIGTTIN, suspchild); 259 signal(SIGTTOU, suspchild); 260 261 /* Fork a child to execute the command on the remote host using ssh. */ 262 do_cmd_pid = fork(); 263 if (do_cmd_pid == 0) { 264 /* Child. */ 265 close(pin[1]); 266 close(pout[0]); 267 dup2(pin[0], 0); 268 dup2(pout[1], 1); 269 close(pin[0]); 270 close(pout[1]); 271 272 replacearg(&args, 0, "%s", ssh_program); 273 if (remuser != NULL) { 274 addargs(&args, "-l"); 275 addargs(&args, "%s", remuser); 276 } 277 addargs(&args, "--"); 278 addargs(&args, "%s", host); 279 addargs(&args, "%s", cmd); 280 281 execvp(ssh_program, args.list); 282 perror(ssh_program); 283 exit(1); 284 } else if (do_cmd_pid == -1) { 285 fatal("fork: %s", strerror(errno)); 286 } 287 /* Parent. Close the other side, and return the local side. */ 288 close(pin[0]); 289 *fdout = pin[1]; 290 close(pout[1]); 291 *fdin = pout[0]; 292 signal(SIGTERM, killchild); 293 signal(SIGINT, killchild); 294 signal(SIGHUP, killchild); 295 return 0; 296 } 297 298 /* 299 * This functions executes a command simlar to do_cmd(), but expects the 300 * input and output descriptors to be setup by a previous call to do_cmd(). 301 * This way the input and output of two commands can be connected. 302 */ 303 int 304 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 305 { 306 pid_t pid; 307 int status; 308 309 if (verbose_mode) 310 fprintf(stderr, 311 "Executing: 2nd program %s host %s, user %s, command %s\n", 312 ssh_program, host, 313 remuser ? remuser : "(unspecified)", cmd); 314 315 /* Fork a child to execute the command on the remote host using ssh. */ 316 pid = fork(); 317 if (pid == 0) { 318 dup2(fdin, 0); 319 dup2(fdout, 1); 320 321 replacearg(&args, 0, "%s", ssh_program); 322 if (remuser != NULL) { 323 addargs(&args, "-l"); 324 addargs(&args, "%s", remuser); 325 } 326 addargs(&args, "--"); 327 addargs(&args, "%s", host); 328 addargs(&args, "%s", cmd); 329 330 execvp(ssh_program, args.list); 331 perror(ssh_program); 332 exit(1); 333 } else if (pid == -1) { 334 fatal("fork: %s", strerror(errno)); 335 } 336 while (waitpid(pid, &status, 0) == -1) 337 if (errno != EINTR) 338 fatal("do_cmd2: waitpid: %s", strerror(errno)); 339 return 0; 340 } 341 342 typedef struct { 343 size_t cnt; 344 char *buf; 345 } BUF; 346 347 BUF *allocbuf(BUF *, int, int); 348 void lostconn(int); 349 int okname(char *); 350 void run_err(const char *,...); 351 void verifydir(char *); 352 353 struct passwd *pwd; 354 uid_t userid; 355 int errs, remin, remout; 356 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 357 358 #define CMDNEEDS 64 359 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 360 361 int response(void); 362 void rsource(char *, struct stat *); 363 void sink(int, char *[]); 364 void source(int, char *[]); 365 void tolocal(int, char *[]); 366 void toremote(char *, int, char *[]); 367 void usage(void); 368 369 int 370 main(int argc, char **argv) 371 { 372 int ch, fflag, tflag, status, n; 373 char *targ, **newargv; 374 const char *errstr; 375 extern char *optarg; 376 extern int optind; 377 378 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 379 sanitise_stdfd(); 380 381 /* Copy argv, because we modify it */ 382 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 383 for (n = 0; n < argc; n++) 384 newargv[n] = xstrdup(argv[n]); 385 argv = newargv; 386 387 __progname = ssh_get_progname(argv[0]); 388 389 memset(&args, '\0', sizeof(args)); 390 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 391 args.list = remote_remote_args.list = NULL; 392 addargs(&args, "%s", ssh_program); 393 addargs(&args, "-x"); 394 addargs(&args, "-oForwardAgent=no"); 395 addargs(&args, "-oPermitLocalCommand=no"); 396 addargs(&args, "-oClearAllForwardings=yes"); 397 398 fflag = tflag = 0; 399 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 400 switch (ch) { 401 /* User-visible flags. */ 402 case '1': 403 case '2': 404 case '4': 405 case '6': 406 case 'C': 407 addargs(&args, "-%c", ch); 408 addargs(&remote_remote_args, "-%c", ch); 409 break; 410 case '3': 411 throughlocal = 1; 412 break; 413 case 'o': 414 case 'c': 415 case 'i': 416 case 'F': 417 addargs(&remote_remote_args, "-%c", ch); 418 addargs(&remote_remote_args, "%s", optarg); 419 addargs(&args, "-%c", ch); 420 addargs(&args, "%s", optarg); 421 break; 422 case 'P': 423 addargs(&remote_remote_args, "-p"); 424 addargs(&remote_remote_args, "%s", optarg); 425 addargs(&args, "-p"); 426 addargs(&args, "%s", optarg); 427 break; 428 case 'B': 429 addargs(&remote_remote_args, "-oBatchmode=yes"); 430 addargs(&args, "-oBatchmode=yes"); 431 break; 432 case 'l': 433 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 434 &errstr); 435 if (errstr != NULL) 436 usage(); 437 limit_kbps *= 1024; /* kbps */ 438 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 439 break; 440 case 'p': 441 pflag = 1; 442 break; 443 case 'r': 444 iamrecursive = 1; 445 break; 446 case 'S': 447 ssh_program = xstrdup(optarg); 448 break; 449 case 'v': 450 addargs(&args, "-v"); 451 addargs(&remote_remote_args, "-v"); 452 verbose_mode = 1; 453 break; 454 case 'q': 455 addargs(&args, "-q"); 456 addargs(&remote_remote_args, "-q"); 457 showprogress = 0; 458 break; 459 460 /* Server options. */ 461 case 'd': 462 targetshouldbedirectory = 1; 463 break; 464 case 'f': /* "from" */ 465 iamremote = 1; 466 fflag = 1; 467 break; 468 case 't': /* "to" */ 469 iamremote = 1; 470 tflag = 1; 471 #ifdef HAVE_CYGWIN 472 setmode(0, O_BINARY); 473 #endif 474 break; 475 default: 476 usage(); 477 } 478 argc -= optind; 479 argv += optind; 480 481 if ((pwd = getpwuid(userid = getuid())) == NULL) 482 fatal("unknown user %u", (u_int) userid); 483 484 if (!isatty(STDOUT_FILENO)) 485 showprogress = 0; 486 487 if (pflag) { 488 /* Cannot pledge: -p allows setuid/setgid files... */ 489 } else { 490 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 491 NULL) == -1) { 492 perror("pledge"); 493 exit(1); 494 } 495 } 496 497 remin = STDIN_FILENO; 498 remout = STDOUT_FILENO; 499 500 if (fflag) { 501 /* Follow "protocol", send data. */ 502 (void) response(); 503 source(argc, argv); 504 exit(errs != 0); 505 } 506 if (tflag) { 507 /* Receive data. */ 508 sink(argc, argv); 509 exit(errs != 0); 510 } 511 if (argc < 2) 512 usage(); 513 if (argc > 2) 514 targetshouldbedirectory = 1; 515 516 remin = remout = -1; 517 do_cmd_pid = -1; 518 /* Command to be executed on remote system using "ssh". */ 519 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 520 verbose_mode ? " -v" : "", 521 iamrecursive ? " -r" : "", pflag ? " -p" : "", 522 targetshouldbedirectory ? " -d" : ""); 523 524 (void) signal(SIGPIPE, lostconn); 525 526 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 527 toremote(targ, argc, argv); 528 else { 529 if (targetshouldbedirectory) 530 verifydir(argv[argc - 1]); 531 tolocal(argc, argv); /* Dest is local host. */ 532 } 533 /* 534 * Finally check the exit status of the ssh process, if one was forked 535 * and no error has occurred yet 536 */ 537 if (do_cmd_pid != -1 && errs == 0) { 538 if (remin != -1) 539 (void) close(remin); 540 if (remout != -1) 541 (void) close(remout); 542 if (waitpid(do_cmd_pid, &status, 0) == -1) 543 errs = 1; 544 else { 545 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 546 errs = 1; 547 } 548 } 549 exit(errs != 0); 550 } 551 552 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 553 static int 554 scpio(void *_cnt, size_t s) 555 { 556 off_t *cnt = (off_t *)_cnt; 557 558 *cnt += s; 559 if (limit_kbps > 0) 560 bandwidth_limit(&bwlimit, s); 561 return 0; 562 } 563 564 static int 565 do_times(int fd, int verb, const struct stat *sb) 566 { 567 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 568 char buf[(20 + 7 + 2) * 2 + 2]; 569 570 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 571 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 572 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 573 if (verb) { 574 fprintf(stderr, "File mtime %lld atime %lld\n", 575 (long long)sb->st_mtime, (long long)sb->st_atime); 576 fprintf(stderr, "Sending file timestamps: %s", buf); 577 } 578 (void) atomicio(vwrite, fd, buf, strlen(buf)); 579 return (response()); 580 } 581 582 void 583 toremote(char *targ, int argc, char **argv) 584 { 585 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 586 arglist alist; 587 int i; 588 u_int j; 589 590 memset(&alist, '\0', sizeof(alist)); 591 alist.list = NULL; 592 593 *targ++ = 0; 594 if (*targ == 0) 595 targ = "."; 596 597 arg = xstrdup(argv[argc - 1]); 598 if ((thost = strrchr(arg, '@'))) { 599 /* user@host */ 600 *thost++ = 0; 601 tuser = arg; 602 if (*tuser == '\0') 603 tuser = NULL; 604 } else { 605 thost = arg; 606 tuser = NULL; 607 } 608 609 if (tuser != NULL && !okname(tuser)) { 610 free(arg); 611 return; 612 } 613 614 for (i = 0; i < argc - 1; i++) { 615 src = colon(argv[i]); 616 if (src && throughlocal) { /* extended remote to remote */ 617 *src++ = 0; 618 if (*src == 0) 619 src = "."; 620 host = strrchr(argv[i], '@'); 621 if (host) { 622 *host++ = 0; 623 host = cleanhostname(host); 624 suser = argv[i]; 625 if (*suser == '\0') 626 suser = pwd->pw_name; 627 else if (!okname(suser)) 628 continue; 629 } else { 630 host = cleanhostname(argv[i]); 631 suser = NULL; 632 } 633 xasprintf(&bp, "%s -f %s%s", cmd, 634 *src == '-' ? "-- " : "", src); 635 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 636 exit(1); 637 free(bp); 638 host = cleanhostname(thost); 639 xasprintf(&bp, "%s -t %s%s", cmd, 640 *targ == '-' ? "-- " : "", targ); 641 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 642 exit(1); 643 free(bp); 644 (void) close(remin); 645 (void) close(remout); 646 remin = remout = -1; 647 } else if (src) { /* standard remote to remote */ 648 freeargs(&alist); 649 addargs(&alist, "%s", ssh_program); 650 addargs(&alist, "-x"); 651 addargs(&alist, "-oClearAllForwardings=yes"); 652 addargs(&alist, "-n"); 653 for (j = 0; j < remote_remote_args.num; j++) { 654 addargs(&alist, "%s", 655 remote_remote_args.list[j]); 656 } 657 *src++ = 0; 658 if (*src == 0) 659 src = "."; 660 host = strrchr(argv[i], '@'); 661 662 if (host) { 663 *host++ = 0; 664 host = cleanhostname(host); 665 suser = argv[i]; 666 if (*suser == '\0') 667 suser = pwd->pw_name; 668 else if (!okname(suser)) 669 continue; 670 addargs(&alist, "-l"); 671 addargs(&alist, "%s", suser); 672 } else { 673 host = cleanhostname(argv[i]); 674 } 675 addargs(&alist, "--"); 676 addargs(&alist, "%s", host); 677 addargs(&alist, "%s", cmd); 678 addargs(&alist, "%s", src); 679 addargs(&alist, "%s%s%s:%s", 680 tuser ? tuser : "", tuser ? "@" : "", 681 thost, targ); 682 if (do_local_cmd(&alist) != 0) 683 errs = 1; 684 } else { /* local to remote */ 685 if (remin == -1) { 686 xasprintf(&bp, "%s -t %s%s", cmd, 687 *targ == '-' ? "-- " : "", targ); 688 host = cleanhostname(thost); 689 if (do_cmd(host, tuser, bp, &remin, 690 &remout) < 0) 691 exit(1); 692 if (response() < 0) 693 exit(1); 694 free(bp); 695 } 696 source(1, argv + i); 697 } 698 } 699 free(arg); 700 } 701 702 void 703 tolocal(int argc, char **argv) 704 { 705 char *bp, *host, *src, *suser; 706 arglist alist; 707 int i; 708 709 memset(&alist, '\0', sizeof(alist)); 710 alist.list = NULL; 711 712 for (i = 0; i < argc - 1; i++) { 713 if (!(src = colon(argv[i]))) { /* Local to local. */ 714 freeargs(&alist); 715 addargs(&alist, "%s", _PATH_CP); 716 if (iamrecursive) 717 addargs(&alist, "-r"); 718 if (pflag) 719 addargs(&alist, "-p"); 720 addargs(&alist, "--"); 721 addargs(&alist, "%s", argv[i]); 722 addargs(&alist, "%s", argv[argc-1]); 723 if (do_local_cmd(&alist)) 724 ++errs; 725 continue; 726 } 727 *src++ = 0; 728 if (*src == 0) 729 src = "."; 730 if ((host = strrchr(argv[i], '@')) == NULL) { 731 host = argv[i]; 732 suser = NULL; 733 } else { 734 *host++ = 0; 735 suser = argv[i]; 736 if (*suser == '\0') 737 suser = pwd->pw_name; 738 } 739 host = cleanhostname(host); 740 xasprintf(&bp, "%s -f %s%s", 741 cmd, *src == '-' ? "-- " : "", src); 742 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 743 free(bp); 744 ++errs; 745 continue; 746 } 747 free(bp); 748 sink(1, argv + argc - 1); 749 (void) close(remin); 750 remin = remout = -1; 751 } 752 } 753 754 void 755 source(int argc, char **argv) 756 { 757 struct stat stb; 758 static BUF buffer; 759 BUF *bp; 760 off_t i, statbytes; 761 size_t amt, nr; 762 int fd = -1, haderr, indx; 763 char *last, *name, buf[2048], encname[PATH_MAX]; 764 int len; 765 766 for (indx = 0; indx < argc; ++indx) { 767 name = argv[indx]; 768 statbytes = 0; 769 len = strlen(name); 770 while (len > 1 && name[len-1] == '/') 771 name[--len] = '\0'; 772 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 773 goto syserr; 774 if (strchr(name, '\n') != NULL) { 775 strnvis(encname, name, sizeof(encname), VIS_NL); 776 name = encname; 777 } 778 if (fstat(fd, &stb) < 0) { 779 syserr: run_err("%s: %s", name, strerror(errno)); 780 goto next; 781 } 782 if (stb.st_size < 0) { 783 run_err("%s: %s", name, "Negative file size"); 784 goto next; 785 } 786 unset_nonblock(fd); 787 switch (stb.st_mode & S_IFMT) { 788 case S_IFREG: 789 break; 790 case S_IFDIR: 791 if (iamrecursive) { 792 rsource(name, &stb); 793 goto next; 794 } 795 /* FALLTHROUGH */ 796 default: 797 run_err("%s: not a regular file", name); 798 goto next; 799 } 800 if ((last = strrchr(name, '/')) == NULL) 801 last = name; 802 else 803 ++last; 804 curfile = last; 805 if (pflag) { 806 if (do_times(remout, verbose_mode, &stb) < 0) 807 goto next; 808 } 809 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 810 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 811 (u_int) (stb.st_mode & FILEMODEMASK), 812 (long long)stb.st_size, last); 813 if (verbose_mode) { 814 fprintf(stderr, "Sending file modes: %s", buf); 815 } 816 (void) atomicio(vwrite, remout, buf, strlen(buf)); 817 if (response() < 0) 818 goto next; 819 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 820 next: if (fd != -1) { 821 (void) close(fd); 822 fd = -1; 823 } 824 continue; 825 } 826 if (showprogress) 827 start_progress_meter(curfile, stb.st_size, &statbytes); 828 set_nonblock(remout); 829 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 830 amt = bp->cnt; 831 if (i + (off_t)amt > stb.st_size) 832 amt = stb.st_size - i; 833 if (!haderr) { 834 if ((nr = atomicio(read, fd, 835 bp->buf, amt)) != amt) { 836 haderr = errno; 837 memset(bp->buf + nr, 0, amt - nr); 838 } 839 } 840 /* Keep writing after error to retain sync */ 841 if (haderr) { 842 (void)atomicio(vwrite, remout, bp->buf, amt); 843 memset(bp->buf, 0, amt); 844 continue; 845 } 846 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 847 &statbytes) != amt) 848 haderr = errno; 849 } 850 unset_nonblock(remout); 851 if (showprogress) 852 stop_progress_meter(); 853 854 if (fd != -1) { 855 if (close(fd) < 0 && !haderr) 856 haderr = errno; 857 fd = -1; 858 } 859 if (!haderr) 860 (void) atomicio(vwrite, remout, "", 1); 861 else 862 run_err("%s: %s", name, strerror(haderr)); 863 (void) response(); 864 } 865 } 866 867 void 868 rsource(char *name, struct stat *statp) 869 { 870 DIR *dirp; 871 struct dirent *dp; 872 char *last, *vect[1], path[PATH_MAX]; 873 874 if (!(dirp = opendir(name))) { 875 run_err("%s: %s", name, strerror(errno)); 876 return; 877 } 878 last = strrchr(name, '/'); 879 if (last == NULL) 880 last = name; 881 else 882 last++; 883 if (pflag) { 884 if (do_times(remout, verbose_mode, statp) < 0) { 885 closedir(dirp); 886 return; 887 } 888 } 889 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 890 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 891 if (verbose_mode) 892 fprintf(stderr, "Entering directory: %s", path); 893 (void) atomicio(vwrite, remout, path, strlen(path)); 894 if (response() < 0) { 895 closedir(dirp); 896 return; 897 } 898 while ((dp = readdir(dirp)) != NULL) { 899 if (dp->d_ino == 0) 900 continue; 901 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 902 continue; 903 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 904 run_err("%s/%s: name too long", name, dp->d_name); 905 continue; 906 } 907 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 908 vect[0] = path; 909 source(1, vect); 910 } 911 (void) closedir(dirp); 912 (void) atomicio(vwrite, remout, "E\n", 2); 913 (void) response(); 914 } 915 916 void 917 sink(int argc, char **argv) 918 { 919 static BUF buffer; 920 struct stat stb; 921 enum { 922 YES, NO, DISPLAYED 923 } wrerr; 924 BUF *bp; 925 off_t i; 926 size_t j, count; 927 int amt, exists, first, ofd; 928 mode_t mode, omode, mask; 929 off_t size, statbytes; 930 unsigned long long ull; 931 int setimes, targisdir, wrerrno = 0; 932 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; 933 struct timeval tv[2]; 934 935 #define atime tv[0] 936 #define mtime tv[1] 937 #define SCREWUP(str) { why = str; goto screwup; } 938 939 setimes = targisdir = 0; 940 mask = umask(0); 941 if (!pflag) 942 (void) umask(mask); 943 if (argc != 1) { 944 run_err("ambiguous target"); 945 exit(1); 946 } 947 targ = *argv; 948 if (targetshouldbedirectory) 949 verifydir(targ); 950 951 (void) atomicio(vwrite, remout, "", 1); 952 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 953 targisdir = 1; 954 for (first = 1;; first = 0) { 955 cp = buf; 956 if (atomicio(read, remin, cp, 1) != 1) 957 return; 958 if (*cp++ == '\n') 959 SCREWUP("unexpected <newline>"); 960 do { 961 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 962 SCREWUP("lost connection"); 963 *cp++ = ch; 964 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 965 *cp = 0; 966 if (verbose_mode) 967 fprintf(stderr, "Sink: %s", buf); 968 969 if (buf[0] == '\01' || buf[0] == '\02') { 970 if (iamremote == 0) 971 (void) atomicio(vwrite, STDERR_FILENO, 972 buf + 1, strlen(buf + 1)); 973 if (buf[0] == '\02') 974 exit(1); 975 ++errs; 976 continue; 977 } 978 if (buf[0] == 'E') { 979 (void) atomicio(vwrite, remout, "", 1); 980 return; 981 } 982 if (ch == '\n') 983 *--cp = 0; 984 985 cp = buf; 986 if (*cp == 'T') { 987 setimes++; 988 cp++; 989 if (!isdigit((unsigned char)*cp)) 990 SCREWUP("mtime.sec not present"); 991 ull = strtoull(cp, &cp, 10); 992 if (!cp || *cp++ != ' ') 993 SCREWUP("mtime.sec not delimited"); 994 if ((time_t)ull < 0 || 995 (unsigned long long)(time_t)ull != ull) 996 setimes = 0; /* out of range */ 997 mtime.tv_sec = ull; 998 mtime.tv_usec = strtol(cp, &cp, 10); 999 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1000 mtime.tv_usec > 999999) 1001 SCREWUP("mtime.usec not delimited"); 1002 if (!isdigit((unsigned char)*cp)) 1003 SCREWUP("atime.sec not present"); 1004 ull = strtoull(cp, &cp, 10); 1005 if (!cp || *cp++ != ' ') 1006 SCREWUP("atime.sec not delimited"); 1007 if ((time_t)ull < 0 || 1008 (unsigned long long)(time_t)ull != ull) 1009 setimes = 0; /* out of range */ 1010 atime.tv_sec = ull; 1011 atime.tv_usec = strtol(cp, &cp, 10); 1012 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1013 atime.tv_usec > 999999) 1014 SCREWUP("atime.usec not delimited"); 1015 (void) atomicio(vwrite, remout, "", 1); 1016 continue; 1017 } 1018 if (*cp != 'C' && *cp != 'D') { 1019 /* 1020 * Check for the case "rcp remote:foo\* local:bar". 1021 * In this case, the line "No match." can be returned 1022 * by the shell before the rcp command on the remote is 1023 * executed so the ^Aerror_message convention isn't 1024 * followed. 1025 */ 1026 if (first) { 1027 run_err("%s", cp); 1028 exit(1); 1029 } 1030 SCREWUP("expected control record"); 1031 } 1032 mode = 0; 1033 for (++cp; cp < buf + 5; cp++) { 1034 if (*cp < '0' || *cp > '7') 1035 SCREWUP("bad mode"); 1036 mode = (mode << 3) | (*cp - '0'); 1037 } 1038 if (*cp++ != ' ') 1039 SCREWUP("mode not delimited"); 1040 1041 for (size = 0; isdigit((unsigned char)*cp);) 1042 size = size * 10 + (*cp++ - '0'); 1043 if (*cp++ != ' ') 1044 SCREWUP("size not delimited"); 1045 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1046 run_err("error: unexpected filename: %s", cp); 1047 exit(1); 1048 } 1049 if (targisdir) { 1050 static char *namebuf; 1051 static size_t cursize; 1052 size_t need; 1053 1054 need = strlen(targ) + strlen(cp) + 250; 1055 if (need > cursize) { 1056 free(namebuf); 1057 namebuf = xmalloc(need); 1058 cursize = need; 1059 } 1060 (void) snprintf(namebuf, need, "%s%s%s", targ, 1061 strcmp(targ, "/") ? "/" : "", cp); 1062 np = namebuf; 1063 } else 1064 np = targ; 1065 curfile = cp; 1066 exists = stat(np, &stb) == 0; 1067 if (buf[0] == 'D') { 1068 int mod_flag = pflag; 1069 if (!iamrecursive) 1070 SCREWUP("received directory without -r"); 1071 if (exists) { 1072 if (!S_ISDIR(stb.st_mode)) { 1073 errno = ENOTDIR; 1074 goto bad; 1075 } 1076 if (pflag) 1077 (void) chmod(np, mode); 1078 } else { 1079 /* Handle copying from a read-only 1080 directory */ 1081 mod_flag = 1; 1082 if (mkdir(np, mode | S_IRWXU) < 0) 1083 goto bad; 1084 } 1085 vect[0] = xstrdup(np); 1086 sink(1, vect); 1087 if (setimes) { 1088 setimes = 0; 1089 if (utimes(vect[0], tv) < 0) 1090 run_err("%s: set times: %s", 1091 vect[0], strerror(errno)); 1092 } 1093 if (mod_flag) 1094 (void) chmod(vect[0], mode); 1095 free(vect[0]); 1096 continue; 1097 } 1098 omode = mode; 1099 mode |= S_IWUSR; 1100 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1101 bad: run_err("%s: %s", np, strerror(errno)); 1102 continue; 1103 } 1104 (void) atomicio(vwrite, remout, "", 1); 1105 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1106 (void) close(ofd); 1107 continue; 1108 } 1109 cp = bp->buf; 1110 wrerr = NO; 1111 1112 statbytes = 0; 1113 if (showprogress) 1114 start_progress_meter(curfile, size, &statbytes); 1115 set_nonblock(remin); 1116 for (count = i = 0; i < size; i += bp->cnt) { 1117 amt = bp->cnt; 1118 if (i + amt > size) 1119 amt = size - i; 1120 count += amt; 1121 do { 1122 j = atomicio6(read, remin, cp, amt, 1123 scpio, &statbytes); 1124 if (j == 0) { 1125 run_err("%s", j != EPIPE ? 1126 strerror(errno) : 1127 "dropped connection"); 1128 exit(1); 1129 } 1130 amt -= j; 1131 cp += j; 1132 } while (amt > 0); 1133 1134 if (count == bp->cnt) { 1135 /* Keep reading so we stay sync'd up. */ 1136 if (wrerr == NO) { 1137 if (atomicio(vwrite, ofd, bp->buf, 1138 count) != count) { 1139 wrerr = YES; 1140 wrerrno = errno; 1141 } 1142 } 1143 count = 0; 1144 cp = bp->buf; 1145 } 1146 } 1147 unset_nonblock(remin); 1148 if (showprogress) 1149 stop_progress_meter(); 1150 if (count != 0 && wrerr == NO && 1151 atomicio(vwrite, ofd, bp->buf, count) != count) { 1152 wrerr = YES; 1153 wrerrno = errno; 1154 } 1155 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1156 ftruncate(ofd, size) != 0) { 1157 run_err("%s: truncate: %s", np, strerror(errno)); 1158 wrerr = DISPLAYED; 1159 } 1160 if (pflag) { 1161 if (exists || omode != mode) 1162 #ifdef HAVE_FCHMOD 1163 if (fchmod(ofd, omode)) { 1164 #else /* HAVE_FCHMOD */ 1165 if (chmod(np, omode)) { 1166 #endif /* HAVE_FCHMOD */ 1167 run_err("%s: set mode: %s", 1168 np, strerror(errno)); 1169 wrerr = DISPLAYED; 1170 } 1171 } else { 1172 if (!exists && omode != mode) 1173 #ifdef HAVE_FCHMOD 1174 if (fchmod(ofd, omode & ~mask)) { 1175 #else /* HAVE_FCHMOD */ 1176 if (chmod(np, omode & ~mask)) { 1177 #endif /* HAVE_FCHMOD */ 1178 run_err("%s: set mode: %s", 1179 np, strerror(errno)); 1180 wrerr = DISPLAYED; 1181 } 1182 } 1183 if (close(ofd) == -1) { 1184 wrerr = YES; 1185 wrerrno = errno; 1186 } 1187 (void) response(); 1188 if (setimes && wrerr == NO) { 1189 setimes = 0; 1190 if (utimes(np, tv) < 0) { 1191 run_err("%s: set times: %s", 1192 np, strerror(errno)); 1193 wrerr = DISPLAYED; 1194 } 1195 } 1196 switch (wrerr) { 1197 case YES: 1198 run_err("%s: %s", np, strerror(wrerrno)); 1199 break; 1200 case NO: 1201 (void) atomicio(vwrite, remout, "", 1); 1202 break; 1203 case DISPLAYED: 1204 break; 1205 } 1206 } 1207 screwup: 1208 run_err("protocol error: %s", why); 1209 exit(1); 1210 } 1211 1212 int 1213 response(void) 1214 { 1215 char ch, *cp, resp, rbuf[2048]; 1216 1217 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1218 lostconn(0); 1219 1220 cp = rbuf; 1221 switch (resp) { 1222 case 0: /* ok */ 1223 return (0); 1224 default: 1225 *cp++ = resp; 1226 /* FALLTHROUGH */ 1227 case 1: /* error, followed by error msg */ 1228 case 2: /* fatal error, "" */ 1229 do { 1230 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1231 lostconn(0); 1232 *cp++ = ch; 1233 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1234 1235 if (!iamremote) 1236 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1237 ++errs; 1238 if (resp == 1) 1239 return (-1); 1240 exit(1); 1241 } 1242 /* NOTREACHED */ 1243 } 1244 1245 void 1246 usage(void) 1247 { 1248 (void) fprintf(stderr, 1249 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1250 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1251 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1252 exit(1); 1253 } 1254 1255 void 1256 run_err(const char *fmt,...) 1257 { 1258 static FILE *fp; 1259 va_list ap; 1260 1261 ++errs; 1262 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1263 (void) fprintf(fp, "%c", 0x01); 1264 (void) fprintf(fp, "scp: "); 1265 va_start(ap, fmt); 1266 (void) vfprintf(fp, fmt, ap); 1267 va_end(ap); 1268 (void) fprintf(fp, "\n"); 1269 (void) fflush(fp); 1270 } 1271 1272 if (!iamremote) { 1273 va_start(ap, fmt); 1274 vfprintf(stderr, fmt, ap); 1275 va_end(ap); 1276 fprintf(stderr, "\n"); 1277 } 1278 } 1279 1280 void 1281 verifydir(char *cp) 1282 { 1283 struct stat stb; 1284 1285 if (!stat(cp, &stb)) { 1286 if (S_ISDIR(stb.st_mode)) 1287 return; 1288 errno = ENOTDIR; 1289 } 1290 run_err("%s: %s", cp, strerror(errno)); 1291 killchild(0); 1292 } 1293 1294 int 1295 okname(char *cp0) 1296 { 1297 int c; 1298 char *cp; 1299 1300 cp = cp0; 1301 do { 1302 c = (int)*cp; 1303 if (c & 0200) 1304 goto bad; 1305 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1306 switch (c) { 1307 case '\'': 1308 case '"': 1309 case '`': 1310 case ' ': 1311 case '#': 1312 goto bad; 1313 default: 1314 break; 1315 } 1316 } 1317 } while (*++cp); 1318 return (1); 1319 1320 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1321 return (0); 1322 } 1323 1324 BUF * 1325 allocbuf(BUF *bp, int fd, int blksize) 1326 { 1327 size_t size; 1328 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1329 struct stat stb; 1330 1331 if (fstat(fd, &stb) < 0) { 1332 run_err("fstat: %s", strerror(errno)); 1333 return (0); 1334 } 1335 size = roundup(stb.st_blksize, blksize); 1336 if (size == 0) 1337 size = blksize; 1338 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1339 size = blksize; 1340 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1341 if (bp->cnt >= size) 1342 return (bp); 1343 if (bp->buf == NULL) 1344 bp->buf = xmalloc(size); 1345 else 1346 bp->buf = xreallocarray(bp->buf, 1, size); 1347 memset(bp->buf, 0, size); 1348 bp->cnt = size; 1349 return (bp); 1350 } 1351 1352 void 1353 lostconn(int signo) 1354 { 1355 if (!iamremote) 1356 (void)write(STDERR_FILENO, "lost connection\n", 16); 1357 if (signo) 1358 _exit(1); 1359 else 1360 exit(1); 1361 } 1362