1 /* $OpenBSD: scp.c,v 1.182 2015/04/24 01:36:00 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 remin = STDIN_FILENO; 488 remout = STDOUT_FILENO; 489 490 if (fflag) { 491 /* Follow "protocol", send data. */ 492 (void) response(); 493 source(argc, argv); 494 exit(errs != 0); 495 } 496 if (tflag) { 497 /* Receive data. */ 498 sink(argc, argv); 499 exit(errs != 0); 500 } 501 if (argc < 2) 502 usage(); 503 if (argc > 2) 504 targetshouldbedirectory = 1; 505 506 remin = remout = -1; 507 do_cmd_pid = -1; 508 /* Command to be executed on remote system using "ssh". */ 509 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 510 verbose_mode ? " -v" : "", 511 iamrecursive ? " -r" : "", pflag ? " -p" : "", 512 targetshouldbedirectory ? " -d" : ""); 513 514 (void) signal(SIGPIPE, lostconn); 515 516 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 517 toremote(targ, argc, argv); 518 else { 519 if (targetshouldbedirectory) 520 verifydir(argv[argc - 1]); 521 tolocal(argc, argv); /* Dest is local host. */ 522 } 523 /* 524 * Finally check the exit status of the ssh process, if one was forked 525 * and no error has occurred yet 526 */ 527 if (do_cmd_pid != -1 && errs == 0) { 528 if (remin != -1) 529 (void) close(remin); 530 if (remout != -1) 531 (void) close(remout); 532 if (waitpid(do_cmd_pid, &status, 0) == -1) 533 errs = 1; 534 else { 535 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 536 errs = 1; 537 } 538 } 539 exit(errs != 0); 540 } 541 542 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 543 static int 544 scpio(void *_cnt, size_t s) 545 { 546 off_t *cnt = (off_t *)_cnt; 547 548 *cnt += s; 549 if (limit_kbps > 0) 550 bandwidth_limit(&bwlimit, s); 551 return 0; 552 } 553 554 static int 555 do_times(int fd, int verb, const struct stat *sb) 556 { 557 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 558 char buf[(20 + 7 + 2) * 2 + 2]; 559 560 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 561 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 562 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 563 if (verb) { 564 fprintf(stderr, "File mtime %lld atime %lld\n", 565 (long long)sb->st_mtime, (long long)sb->st_atime); 566 fprintf(stderr, "Sending file timestamps: %s", buf); 567 } 568 (void) atomicio(vwrite, fd, buf, strlen(buf)); 569 return (response()); 570 } 571 572 void 573 toremote(char *targ, int argc, char **argv) 574 { 575 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 576 arglist alist; 577 int i; 578 u_int j; 579 580 memset(&alist, '\0', sizeof(alist)); 581 alist.list = NULL; 582 583 *targ++ = 0; 584 if (*targ == 0) 585 targ = "."; 586 587 arg = xstrdup(argv[argc - 1]); 588 if ((thost = strrchr(arg, '@'))) { 589 /* user@host */ 590 *thost++ = 0; 591 tuser = arg; 592 if (*tuser == '\0') 593 tuser = NULL; 594 } else { 595 thost = arg; 596 tuser = NULL; 597 } 598 599 if (tuser != NULL && !okname(tuser)) { 600 free(arg); 601 return; 602 } 603 604 for (i = 0; i < argc - 1; i++) { 605 src = colon(argv[i]); 606 if (src && throughlocal) { /* extended remote to remote */ 607 *src++ = 0; 608 if (*src == 0) 609 src = "."; 610 host = strrchr(argv[i], '@'); 611 if (host) { 612 *host++ = 0; 613 host = cleanhostname(host); 614 suser = argv[i]; 615 if (*suser == '\0') 616 suser = pwd->pw_name; 617 else if (!okname(suser)) 618 continue; 619 } else { 620 host = cleanhostname(argv[i]); 621 suser = NULL; 622 } 623 xasprintf(&bp, "%s -f %s%s", cmd, 624 *src == '-' ? "-- " : "", src); 625 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 626 exit(1); 627 free(bp); 628 host = cleanhostname(thost); 629 xasprintf(&bp, "%s -t %s%s", cmd, 630 *targ == '-' ? "-- " : "", targ); 631 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 632 exit(1); 633 free(bp); 634 (void) close(remin); 635 (void) close(remout); 636 remin = remout = -1; 637 } else if (src) { /* standard remote to remote */ 638 freeargs(&alist); 639 addargs(&alist, "%s", ssh_program); 640 addargs(&alist, "-x"); 641 addargs(&alist, "-oClearAllForwardings=yes"); 642 addargs(&alist, "-n"); 643 for (j = 0; j < remote_remote_args.num; j++) { 644 addargs(&alist, "%s", 645 remote_remote_args.list[j]); 646 } 647 *src++ = 0; 648 if (*src == 0) 649 src = "."; 650 host = strrchr(argv[i], '@'); 651 652 if (host) { 653 *host++ = 0; 654 host = cleanhostname(host); 655 suser = argv[i]; 656 if (*suser == '\0') 657 suser = pwd->pw_name; 658 else if (!okname(suser)) 659 continue; 660 addargs(&alist, "-l"); 661 addargs(&alist, "%s", suser); 662 } else { 663 host = cleanhostname(argv[i]); 664 } 665 addargs(&alist, "--"); 666 addargs(&alist, "%s", host); 667 addargs(&alist, "%s", cmd); 668 addargs(&alist, "%s", src); 669 addargs(&alist, "%s%s%s:%s", 670 tuser ? tuser : "", tuser ? "@" : "", 671 thost, targ); 672 if (do_local_cmd(&alist) != 0) 673 errs = 1; 674 } else { /* local to remote */ 675 if (remin == -1) { 676 xasprintf(&bp, "%s -t %s%s", cmd, 677 *targ == '-' ? "-- " : "", targ); 678 host = cleanhostname(thost); 679 if (do_cmd(host, tuser, bp, &remin, 680 &remout) < 0) 681 exit(1); 682 if (response() < 0) 683 exit(1); 684 free(bp); 685 } 686 source(1, argv + i); 687 } 688 } 689 free(arg); 690 } 691 692 void 693 tolocal(int argc, char **argv) 694 { 695 char *bp, *host, *src, *suser; 696 arglist alist; 697 int i; 698 699 memset(&alist, '\0', sizeof(alist)); 700 alist.list = NULL; 701 702 for (i = 0; i < argc - 1; i++) { 703 if (!(src = colon(argv[i]))) { /* Local to local. */ 704 freeargs(&alist); 705 addargs(&alist, "%s", _PATH_CP); 706 if (iamrecursive) 707 addargs(&alist, "-r"); 708 if (pflag) 709 addargs(&alist, "-p"); 710 addargs(&alist, "--"); 711 addargs(&alist, "%s", argv[i]); 712 addargs(&alist, "%s", argv[argc-1]); 713 if (do_local_cmd(&alist)) 714 ++errs; 715 continue; 716 } 717 *src++ = 0; 718 if (*src == 0) 719 src = "."; 720 if ((host = strrchr(argv[i], '@')) == NULL) { 721 host = argv[i]; 722 suser = NULL; 723 } else { 724 *host++ = 0; 725 suser = argv[i]; 726 if (*suser == '\0') 727 suser = pwd->pw_name; 728 } 729 host = cleanhostname(host); 730 xasprintf(&bp, "%s -f %s%s", 731 cmd, *src == '-' ? "-- " : "", src); 732 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 733 free(bp); 734 ++errs; 735 continue; 736 } 737 free(bp); 738 sink(1, argv + argc - 1); 739 (void) close(remin); 740 remin = remout = -1; 741 } 742 } 743 744 void 745 source(int argc, char **argv) 746 { 747 struct stat stb; 748 static BUF buffer; 749 BUF *bp; 750 off_t i, statbytes; 751 size_t amt, nr; 752 int fd = -1, haderr, indx; 753 char *last, *name, buf[2048], encname[PATH_MAX]; 754 int len; 755 756 for (indx = 0; indx < argc; ++indx) { 757 name = argv[indx]; 758 statbytes = 0; 759 len = strlen(name); 760 while (len > 1 && name[len-1] == '/') 761 name[--len] = '\0'; 762 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 763 goto syserr; 764 if (strchr(name, '\n') != NULL) { 765 strnvis(encname, name, sizeof(encname), VIS_NL); 766 name = encname; 767 } 768 if (fstat(fd, &stb) < 0) { 769 syserr: run_err("%s: %s", name, strerror(errno)); 770 goto next; 771 } 772 if (stb.st_size < 0) { 773 run_err("%s: %s", name, "Negative file size"); 774 goto next; 775 } 776 unset_nonblock(fd); 777 switch (stb.st_mode & S_IFMT) { 778 case S_IFREG: 779 break; 780 case S_IFDIR: 781 if (iamrecursive) { 782 rsource(name, &stb); 783 goto next; 784 } 785 /* FALLTHROUGH */ 786 default: 787 run_err("%s: not a regular file", name); 788 goto next; 789 } 790 if ((last = strrchr(name, '/')) == NULL) 791 last = name; 792 else 793 ++last; 794 curfile = last; 795 if (pflag) { 796 if (do_times(remout, verbose_mode, &stb) < 0) 797 goto next; 798 } 799 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 800 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 801 (u_int) (stb.st_mode & FILEMODEMASK), 802 (long long)stb.st_size, last); 803 if (verbose_mode) { 804 fprintf(stderr, "Sending file modes: %s", buf); 805 } 806 (void) atomicio(vwrite, remout, buf, strlen(buf)); 807 if (response() < 0) 808 goto next; 809 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 810 next: if (fd != -1) { 811 (void) close(fd); 812 fd = -1; 813 } 814 continue; 815 } 816 if (showprogress) 817 start_progress_meter(curfile, stb.st_size, &statbytes); 818 set_nonblock(remout); 819 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 820 amt = bp->cnt; 821 if (i + (off_t)amt > stb.st_size) 822 amt = stb.st_size - i; 823 if (!haderr) { 824 if ((nr = atomicio(read, fd, 825 bp->buf, amt)) != amt) { 826 haderr = errno; 827 memset(bp->buf + nr, 0, amt - nr); 828 } 829 } 830 /* Keep writing after error to retain sync */ 831 if (haderr) { 832 (void)atomicio(vwrite, remout, bp->buf, amt); 833 memset(bp->buf, 0, amt); 834 continue; 835 } 836 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 837 &statbytes) != amt) 838 haderr = errno; 839 } 840 unset_nonblock(remout); 841 if (showprogress) 842 stop_progress_meter(); 843 844 if (fd != -1) { 845 if (close(fd) < 0 && !haderr) 846 haderr = errno; 847 fd = -1; 848 } 849 if (!haderr) 850 (void) atomicio(vwrite, remout, "", 1); 851 else 852 run_err("%s: %s", name, strerror(haderr)); 853 (void) response(); 854 } 855 } 856 857 void 858 rsource(char *name, struct stat *statp) 859 { 860 DIR *dirp; 861 struct dirent *dp; 862 char *last, *vect[1], path[PATH_MAX]; 863 864 if (!(dirp = opendir(name))) { 865 run_err("%s: %s", name, strerror(errno)); 866 return; 867 } 868 last = strrchr(name, '/'); 869 if (last == 0) 870 last = name; 871 else 872 last++; 873 if (pflag) { 874 if (do_times(remout, verbose_mode, statp) < 0) { 875 closedir(dirp); 876 return; 877 } 878 } 879 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 880 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 881 if (verbose_mode) 882 fprintf(stderr, "Entering directory: %s", path); 883 (void) atomicio(vwrite, remout, path, strlen(path)); 884 if (response() < 0) { 885 closedir(dirp); 886 return; 887 } 888 while ((dp = readdir(dirp)) != NULL) { 889 if (dp->d_ino == 0) 890 continue; 891 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 892 continue; 893 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 894 run_err("%s/%s: name too long", name, dp->d_name); 895 continue; 896 } 897 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 898 vect[0] = path; 899 source(1, vect); 900 } 901 (void) closedir(dirp); 902 (void) atomicio(vwrite, remout, "E\n", 2); 903 (void) response(); 904 } 905 906 void 907 sink(int argc, char **argv) 908 { 909 static BUF buffer; 910 struct stat stb; 911 enum { 912 YES, NO, DISPLAYED 913 } wrerr; 914 BUF *bp; 915 off_t i; 916 size_t j, count; 917 int amt, exists, first, ofd; 918 mode_t mode, omode, mask; 919 off_t size, statbytes; 920 unsigned long long ull; 921 int setimes, targisdir, wrerrno = 0; 922 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; 923 struct timeval tv[2]; 924 925 #define atime tv[0] 926 #define mtime tv[1] 927 #define SCREWUP(str) { why = str; goto screwup; } 928 929 setimes = targisdir = 0; 930 mask = umask(0); 931 if (!pflag) 932 (void) umask(mask); 933 if (argc != 1) { 934 run_err("ambiguous target"); 935 exit(1); 936 } 937 targ = *argv; 938 if (targetshouldbedirectory) 939 verifydir(targ); 940 941 (void) atomicio(vwrite, remout, "", 1); 942 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 943 targisdir = 1; 944 for (first = 1;; first = 0) { 945 cp = buf; 946 if (atomicio(read, remin, cp, 1) != 1) 947 return; 948 if (*cp++ == '\n') 949 SCREWUP("unexpected <newline>"); 950 do { 951 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 952 SCREWUP("lost connection"); 953 *cp++ = ch; 954 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 955 *cp = 0; 956 if (verbose_mode) 957 fprintf(stderr, "Sink: %s", buf); 958 959 if (buf[0] == '\01' || buf[0] == '\02') { 960 if (iamremote == 0) 961 (void) atomicio(vwrite, STDERR_FILENO, 962 buf + 1, strlen(buf + 1)); 963 if (buf[0] == '\02') 964 exit(1); 965 ++errs; 966 continue; 967 } 968 if (buf[0] == 'E') { 969 (void) atomicio(vwrite, remout, "", 1); 970 return; 971 } 972 if (ch == '\n') 973 *--cp = 0; 974 975 cp = buf; 976 if (*cp == 'T') { 977 setimes++; 978 cp++; 979 if (!isdigit((unsigned char)*cp)) 980 SCREWUP("mtime.sec not present"); 981 ull = strtoull(cp, &cp, 10); 982 if (!cp || *cp++ != ' ') 983 SCREWUP("mtime.sec not delimited"); 984 if ((time_t)ull < 0 || 985 (unsigned long long)(time_t)ull != ull) 986 setimes = 0; /* out of range */ 987 mtime.tv_sec = ull; 988 mtime.tv_usec = strtol(cp, &cp, 10); 989 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 990 mtime.tv_usec > 999999) 991 SCREWUP("mtime.usec not delimited"); 992 if (!isdigit((unsigned char)*cp)) 993 SCREWUP("atime.sec not present"); 994 ull = strtoull(cp, &cp, 10); 995 if (!cp || *cp++ != ' ') 996 SCREWUP("atime.sec not delimited"); 997 if ((time_t)ull < 0 || 998 (unsigned long long)(time_t)ull != ull) 999 setimes = 0; /* out of range */ 1000 atime.tv_sec = ull; 1001 atime.tv_usec = strtol(cp, &cp, 10); 1002 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1003 atime.tv_usec > 999999) 1004 SCREWUP("atime.usec not delimited"); 1005 (void) atomicio(vwrite, remout, "", 1); 1006 continue; 1007 } 1008 if (*cp != 'C' && *cp != 'D') { 1009 /* 1010 * Check for the case "rcp remote:foo\* local:bar". 1011 * In this case, the line "No match." can be returned 1012 * by the shell before the rcp command on the remote is 1013 * executed so the ^Aerror_message convention isn't 1014 * followed. 1015 */ 1016 if (first) { 1017 run_err("%s", cp); 1018 exit(1); 1019 } 1020 SCREWUP("expected control record"); 1021 } 1022 mode = 0; 1023 for (++cp; cp < buf + 5; cp++) { 1024 if (*cp < '0' || *cp > '7') 1025 SCREWUP("bad mode"); 1026 mode = (mode << 3) | (*cp - '0'); 1027 } 1028 if (*cp++ != ' ') 1029 SCREWUP("mode not delimited"); 1030 1031 for (size = 0; isdigit((unsigned char)*cp);) 1032 size = size * 10 + (*cp++ - '0'); 1033 if (*cp++ != ' ') 1034 SCREWUP("size not delimited"); 1035 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1036 run_err("error: unexpected filename: %s", cp); 1037 exit(1); 1038 } 1039 if (targisdir) { 1040 static char *namebuf; 1041 static size_t cursize; 1042 size_t need; 1043 1044 need = strlen(targ) + strlen(cp) + 250; 1045 if (need > cursize) { 1046 free(namebuf); 1047 namebuf = xmalloc(need); 1048 cursize = need; 1049 } 1050 (void) snprintf(namebuf, need, "%s%s%s", targ, 1051 strcmp(targ, "/") ? "/" : "", cp); 1052 np = namebuf; 1053 } else 1054 np = targ; 1055 curfile = cp; 1056 exists = stat(np, &stb) == 0; 1057 if (buf[0] == 'D') { 1058 int mod_flag = pflag; 1059 if (!iamrecursive) 1060 SCREWUP("received directory without -r"); 1061 if (exists) { 1062 if (!S_ISDIR(stb.st_mode)) { 1063 errno = ENOTDIR; 1064 goto bad; 1065 } 1066 if (pflag) 1067 (void) chmod(np, mode); 1068 } else { 1069 /* Handle copying from a read-only 1070 directory */ 1071 mod_flag = 1; 1072 if (mkdir(np, mode | S_IRWXU) < 0) 1073 goto bad; 1074 } 1075 vect[0] = xstrdup(np); 1076 sink(1, vect); 1077 if (setimes) { 1078 setimes = 0; 1079 if (utimes(vect[0], tv) < 0) 1080 run_err("%s: set times: %s", 1081 vect[0], strerror(errno)); 1082 } 1083 if (mod_flag) 1084 (void) chmod(vect[0], mode); 1085 free(vect[0]); 1086 continue; 1087 } 1088 omode = mode; 1089 mode |= S_IWUSR; 1090 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1091 bad: run_err("%s: %s", np, strerror(errno)); 1092 continue; 1093 } 1094 (void) atomicio(vwrite, remout, "", 1); 1095 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1096 (void) close(ofd); 1097 continue; 1098 } 1099 cp = bp->buf; 1100 wrerr = NO; 1101 1102 statbytes = 0; 1103 if (showprogress) 1104 start_progress_meter(curfile, size, &statbytes); 1105 set_nonblock(remin); 1106 for (count = i = 0; i < size; i += bp->cnt) { 1107 amt = bp->cnt; 1108 if (i + amt > size) 1109 amt = size - i; 1110 count += amt; 1111 do { 1112 j = atomicio6(read, remin, cp, amt, 1113 scpio, &statbytes); 1114 if (j == 0) { 1115 run_err("%s", j != EPIPE ? 1116 strerror(errno) : 1117 "dropped connection"); 1118 exit(1); 1119 } 1120 amt -= j; 1121 cp += j; 1122 } while (amt > 0); 1123 1124 if (count == bp->cnt) { 1125 /* Keep reading so we stay sync'd up. */ 1126 if (wrerr == NO) { 1127 if (atomicio(vwrite, ofd, bp->buf, 1128 count) != count) { 1129 wrerr = YES; 1130 wrerrno = errno; 1131 } 1132 } 1133 count = 0; 1134 cp = bp->buf; 1135 } 1136 } 1137 unset_nonblock(remin); 1138 if (showprogress) 1139 stop_progress_meter(); 1140 if (count != 0 && wrerr == NO && 1141 atomicio(vwrite, ofd, bp->buf, count) != count) { 1142 wrerr = YES; 1143 wrerrno = errno; 1144 } 1145 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1146 ftruncate(ofd, size) != 0) { 1147 run_err("%s: truncate: %s", np, strerror(errno)); 1148 wrerr = DISPLAYED; 1149 } 1150 if (pflag) { 1151 if (exists || omode != mode) 1152 #ifdef HAVE_FCHMOD 1153 if (fchmod(ofd, omode)) { 1154 #else /* HAVE_FCHMOD */ 1155 if (chmod(np, omode)) { 1156 #endif /* HAVE_FCHMOD */ 1157 run_err("%s: set mode: %s", 1158 np, strerror(errno)); 1159 wrerr = DISPLAYED; 1160 } 1161 } else { 1162 if (!exists && omode != mode) 1163 #ifdef HAVE_FCHMOD 1164 if (fchmod(ofd, omode & ~mask)) { 1165 #else /* HAVE_FCHMOD */ 1166 if (chmod(np, omode & ~mask)) { 1167 #endif /* HAVE_FCHMOD */ 1168 run_err("%s: set mode: %s", 1169 np, strerror(errno)); 1170 wrerr = DISPLAYED; 1171 } 1172 } 1173 if (close(ofd) == -1) { 1174 wrerr = YES; 1175 wrerrno = errno; 1176 } 1177 (void) response(); 1178 if (setimes && wrerr == NO) { 1179 setimes = 0; 1180 if (utimes(np, tv) < 0) { 1181 run_err("%s: set times: %s", 1182 np, strerror(errno)); 1183 wrerr = DISPLAYED; 1184 } 1185 } 1186 switch (wrerr) { 1187 case YES: 1188 run_err("%s: %s", np, strerror(wrerrno)); 1189 break; 1190 case NO: 1191 (void) atomicio(vwrite, remout, "", 1); 1192 break; 1193 case DISPLAYED: 1194 break; 1195 } 1196 } 1197 screwup: 1198 run_err("protocol error: %s", why); 1199 exit(1); 1200 } 1201 1202 int 1203 response(void) 1204 { 1205 char ch, *cp, resp, rbuf[2048]; 1206 1207 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1208 lostconn(0); 1209 1210 cp = rbuf; 1211 switch (resp) { 1212 case 0: /* ok */ 1213 return (0); 1214 default: 1215 *cp++ = resp; 1216 /* FALLTHROUGH */ 1217 case 1: /* error, followed by error msg */ 1218 case 2: /* fatal error, "" */ 1219 do { 1220 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1221 lostconn(0); 1222 *cp++ = ch; 1223 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1224 1225 if (!iamremote) 1226 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1227 ++errs; 1228 if (resp == 1) 1229 return (-1); 1230 exit(1); 1231 } 1232 /* NOTREACHED */ 1233 } 1234 1235 void 1236 usage(void) 1237 { 1238 (void) fprintf(stderr, 1239 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1240 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1241 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1242 exit(1); 1243 } 1244 1245 void 1246 run_err(const char *fmt,...) 1247 { 1248 static FILE *fp; 1249 va_list ap; 1250 1251 ++errs; 1252 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1253 (void) fprintf(fp, "%c", 0x01); 1254 (void) fprintf(fp, "scp: "); 1255 va_start(ap, fmt); 1256 (void) vfprintf(fp, fmt, ap); 1257 va_end(ap); 1258 (void) fprintf(fp, "\n"); 1259 (void) fflush(fp); 1260 } 1261 1262 if (!iamremote) { 1263 va_start(ap, fmt); 1264 vfprintf(stderr, fmt, ap); 1265 va_end(ap); 1266 fprintf(stderr, "\n"); 1267 } 1268 } 1269 1270 void 1271 verifydir(char *cp) 1272 { 1273 struct stat stb; 1274 1275 if (!stat(cp, &stb)) { 1276 if (S_ISDIR(stb.st_mode)) 1277 return; 1278 errno = ENOTDIR; 1279 } 1280 run_err("%s: %s", cp, strerror(errno)); 1281 killchild(0); 1282 } 1283 1284 int 1285 okname(char *cp0) 1286 { 1287 int c; 1288 char *cp; 1289 1290 cp = cp0; 1291 do { 1292 c = (int)*cp; 1293 if (c & 0200) 1294 goto bad; 1295 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1296 switch (c) { 1297 case '\'': 1298 case '"': 1299 case '`': 1300 case ' ': 1301 case '#': 1302 goto bad; 1303 default: 1304 break; 1305 } 1306 } 1307 } while (*++cp); 1308 return (1); 1309 1310 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1311 return (0); 1312 } 1313 1314 BUF * 1315 allocbuf(BUF *bp, int fd, int blksize) 1316 { 1317 size_t size; 1318 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1319 struct stat stb; 1320 1321 if (fstat(fd, &stb) < 0) { 1322 run_err("fstat: %s", strerror(errno)); 1323 return (0); 1324 } 1325 size = roundup(stb.st_blksize, blksize); 1326 if (size == 0) 1327 size = blksize; 1328 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1329 size = blksize; 1330 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1331 if (bp->cnt >= size) 1332 return (bp); 1333 if (bp->buf == NULL) 1334 bp->buf = xmalloc(size); 1335 else 1336 bp->buf = xreallocarray(bp->buf, 1, size); 1337 memset(bp->buf, 0, size); 1338 bp->cnt = size; 1339 return (bp); 1340 } 1341 1342 void 1343 lostconn(int signo) 1344 { 1345 if (!iamremote) 1346 (void)write(STDERR_FILENO, "lost connection\n", 16); 1347 if (signo) 1348 _exit(1); 1349 else 1350 exit(1); 1351 } 1352