1 /* $OpenBSD: scp.c,v 1.179 2013/11/20 20:53:10 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 <sys/param.h> 75 #include <sys/types.h> 76 #include <sys/poll.h> 77 #include <sys/wait.h> 78 #include <sys/stat.h> 79 #include <sys/time.h> 80 #include <sys/uio.h> 81 82 #include <ctype.h> 83 #include <dirent.h> 84 #include <errno.h> 85 #include <fcntl.h> 86 #include <pwd.h> 87 #include <signal.h> 88 #include <stdarg.h> 89 #include <stdio.h> 90 #include <stdlib.h> 91 #include <string.h> 92 #include <time.h> 93 #include <unistd.h> 94 #include <vis.h> 95 96 #include "xmalloc.h" 97 #include "atomicio.h" 98 #include "pathnames.h" 99 #include "log.h" 100 #include "misc.h" 101 #include "progressmeter.h" 102 103 #define COPY_BUFLEN 16384 104 105 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 106 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 107 108 /* Struct for addargs */ 109 arglist args; 110 arglist remote_remote_args; 111 112 /* Bandwidth limit */ 113 long long limit_kbps = 0; 114 struct bwlimit bwlimit; 115 116 /* Name of current file being transferred. */ 117 char *curfile; 118 119 /* This is set to non-zero to enable verbose mode. */ 120 int verbose_mode = 0; 121 122 /* This is set to zero if the progressmeter is not desired. */ 123 int showprogress = 1; 124 125 /* 126 * This is set to non-zero if remote-remote copy should be piped 127 * through this process. 128 */ 129 int throughlocal = 0; 130 131 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 132 char *ssh_program = _PATH_SSH_PROGRAM; 133 134 /* This is used to store the pid of ssh_program */ 135 pid_t do_cmd_pid = -1; 136 137 static void 138 killchild(int signo) 139 { 140 if (do_cmd_pid > 1) { 141 kill(do_cmd_pid, signo ? signo : SIGTERM); 142 waitpid(do_cmd_pid, NULL, 0); 143 } 144 145 if (signo) 146 _exit(1); 147 exit(1); 148 } 149 150 static void 151 suspchild(int signo) 152 { 153 int status; 154 155 if (do_cmd_pid > 1) { 156 kill(do_cmd_pid, signo); 157 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 158 errno == EINTR) 159 ; 160 kill(getpid(), SIGSTOP); 161 } 162 } 163 164 static int 165 do_local_cmd(arglist *a) 166 { 167 u_int i; 168 int status; 169 pid_t pid; 170 171 if (a->num == 0) 172 fatal("do_local_cmd: no arguments"); 173 174 if (verbose_mode) { 175 fprintf(stderr, "Executing:"); 176 for (i = 0; i < a->num; i++) 177 fprintf(stderr, " %s", a->list[i]); 178 fprintf(stderr, "\n"); 179 } 180 if ((pid = fork()) == -1) 181 fatal("do_local_cmd: fork: %s", strerror(errno)); 182 183 if (pid == 0) { 184 execvp(a->list[0], a->list); 185 perror(a->list[0]); 186 exit(1); 187 } 188 189 do_cmd_pid = pid; 190 signal(SIGTERM, killchild); 191 signal(SIGINT, killchild); 192 signal(SIGHUP, killchild); 193 194 while (waitpid(pid, &status, 0) == -1) 195 if (errno != EINTR) 196 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 197 198 do_cmd_pid = -1; 199 200 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 201 return (-1); 202 203 return (0); 204 } 205 206 /* 207 * This function executes the given command as the specified user on the 208 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 209 * assigns the input and output file descriptors on success. 210 */ 211 212 int 213 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 214 { 215 int pin[2], pout[2], reserved[2]; 216 217 if (verbose_mode) 218 fprintf(stderr, 219 "Executing: program %s host %s, user %s, command %s\n", 220 ssh_program, host, 221 remuser ? remuser : "(unspecified)", cmd); 222 223 /* 224 * Reserve two descriptors so that the real pipes won't get 225 * descriptors 0 and 1 because that will screw up dup2 below. 226 */ 227 if (pipe(reserved) < 0) 228 fatal("pipe: %s", strerror(errno)); 229 230 /* Create a socket pair for communicating with ssh. */ 231 if (pipe(pin) < 0) 232 fatal("pipe: %s", strerror(errno)); 233 if (pipe(pout) < 0) 234 fatal("pipe: %s", strerror(errno)); 235 236 /* Free the reserved descriptors. */ 237 close(reserved[0]); 238 close(reserved[1]); 239 240 signal(SIGTSTP, suspchild); 241 signal(SIGTTIN, suspchild); 242 signal(SIGTTOU, suspchild); 243 244 /* Fork a child to execute the command on the remote host using ssh. */ 245 do_cmd_pid = fork(); 246 if (do_cmd_pid == 0) { 247 /* Child. */ 248 close(pin[1]); 249 close(pout[0]); 250 dup2(pin[0], 0); 251 dup2(pout[1], 1); 252 close(pin[0]); 253 close(pout[1]); 254 255 replacearg(&args, 0, "%s", ssh_program); 256 if (remuser != NULL) { 257 addargs(&args, "-l"); 258 addargs(&args, "%s", remuser); 259 } 260 addargs(&args, "--"); 261 addargs(&args, "%s", host); 262 addargs(&args, "%s", cmd); 263 264 execvp(ssh_program, args.list); 265 perror(ssh_program); 266 exit(1); 267 } else if (do_cmd_pid == -1) { 268 fatal("fork: %s", strerror(errno)); 269 } 270 /* Parent. Close the other side, and return the local side. */ 271 close(pin[0]); 272 *fdout = pin[1]; 273 close(pout[1]); 274 *fdin = pout[0]; 275 signal(SIGTERM, killchild); 276 signal(SIGINT, killchild); 277 signal(SIGHUP, killchild); 278 return 0; 279 } 280 281 /* 282 * This functions executes a command simlar to do_cmd(), but expects the 283 * input and output descriptors to be setup by a previous call to do_cmd(). 284 * This way the input and output of two commands can be connected. 285 */ 286 int 287 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 288 { 289 pid_t pid; 290 int status; 291 292 if (verbose_mode) 293 fprintf(stderr, 294 "Executing: 2nd program %s host %s, user %s, command %s\n", 295 ssh_program, host, 296 remuser ? remuser : "(unspecified)", cmd); 297 298 /* Fork a child to execute the command on the remote host using ssh. */ 299 pid = fork(); 300 if (pid == 0) { 301 dup2(fdin, 0); 302 dup2(fdout, 1); 303 304 replacearg(&args, 0, "%s", ssh_program); 305 if (remuser != NULL) { 306 addargs(&args, "-l"); 307 addargs(&args, "%s", remuser); 308 } 309 addargs(&args, "--"); 310 addargs(&args, "%s", host); 311 addargs(&args, "%s", cmd); 312 313 execvp(ssh_program, args.list); 314 perror(ssh_program); 315 exit(1); 316 } else if (pid == -1) { 317 fatal("fork: %s", strerror(errno)); 318 } 319 while (waitpid(pid, &status, 0) == -1) 320 if (errno != EINTR) 321 fatal("do_cmd2: waitpid: %s", strerror(errno)); 322 return 0; 323 } 324 325 typedef struct { 326 size_t cnt; 327 char *buf; 328 } BUF; 329 330 BUF *allocbuf(BUF *, int, int); 331 void lostconn(int); 332 int okname(char *); 333 void run_err(const char *,...); 334 void verifydir(char *); 335 336 struct passwd *pwd; 337 uid_t userid; 338 int errs, remin, remout; 339 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 340 341 #define CMDNEEDS 64 342 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 343 344 int response(void); 345 void rsource(char *, struct stat *); 346 void sink(int, char *[]); 347 void source(int, char *[]); 348 void tolocal(int, char *[]); 349 void toremote(char *, int, char *[]); 350 void usage(void); 351 352 int 353 main(int argc, char **argv) 354 { 355 int ch, fflag, tflag, status, n; 356 char *targ, **newargv; 357 const char *errstr; 358 extern char *optarg; 359 extern int optind; 360 361 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 362 sanitise_stdfd(); 363 364 /* Copy argv, because we modify it */ 365 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 366 for (n = 0; n < argc; n++) 367 newargv[n] = xstrdup(argv[n]); 368 argv = newargv; 369 370 memset(&args, '\0', sizeof(args)); 371 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 372 args.list = remote_remote_args.list = NULL; 373 addargs(&args, "%s", ssh_program); 374 addargs(&args, "-x"); 375 addargs(&args, "-oForwardAgent=no"); 376 addargs(&args, "-oPermitLocalCommand=no"); 377 addargs(&args, "-oClearAllForwardings=yes"); 378 379 fflag = tflag = 0; 380 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 381 switch (ch) { 382 /* User-visible flags. */ 383 case '1': 384 case '2': 385 case '4': 386 case '6': 387 case 'C': 388 addargs(&args, "-%c", ch); 389 addargs(&remote_remote_args, "-%c", ch); 390 break; 391 case '3': 392 throughlocal = 1; 393 break; 394 case 'o': 395 case 'c': 396 case 'i': 397 case 'F': 398 addargs(&remote_remote_args, "-%c", ch); 399 addargs(&remote_remote_args, "%s", optarg); 400 addargs(&args, "-%c", ch); 401 addargs(&args, "%s", optarg); 402 break; 403 case 'P': 404 addargs(&remote_remote_args, "-p"); 405 addargs(&remote_remote_args, "%s", optarg); 406 addargs(&args, "-p"); 407 addargs(&args, "%s", optarg); 408 break; 409 case 'B': 410 addargs(&remote_remote_args, "-oBatchmode=yes"); 411 addargs(&args, "-oBatchmode=yes"); 412 break; 413 case 'l': 414 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 415 &errstr); 416 if (errstr != NULL) 417 usage(); 418 limit_kbps *= 1024; /* kbps */ 419 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 420 break; 421 case 'p': 422 pflag = 1; 423 break; 424 case 'r': 425 iamrecursive = 1; 426 break; 427 case 'S': 428 ssh_program = xstrdup(optarg); 429 break; 430 case 'v': 431 addargs(&args, "-v"); 432 addargs(&remote_remote_args, "-v"); 433 verbose_mode = 1; 434 break; 435 case 'q': 436 addargs(&args, "-q"); 437 addargs(&remote_remote_args, "-q"); 438 showprogress = 0; 439 break; 440 441 /* Server options. */ 442 case 'd': 443 targetshouldbedirectory = 1; 444 break; 445 case 'f': /* "from" */ 446 iamremote = 1; 447 fflag = 1; 448 break; 449 case 't': /* "to" */ 450 iamremote = 1; 451 tflag = 1; 452 break; 453 default: 454 usage(); 455 } 456 argc -= optind; 457 argv += optind; 458 459 if ((pwd = getpwuid(userid = getuid())) == NULL) 460 fatal("unknown user %u", (u_int) userid); 461 462 if (!isatty(STDOUT_FILENO)) 463 showprogress = 0; 464 465 remin = STDIN_FILENO; 466 remout = STDOUT_FILENO; 467 468 if (fflag) { 469 /* Follow "protocol", send data. */ 470 (void) response(); 471 source(argc, argv); 472 exit(errs != 0); 473 } 474 if (tflag) { 475 /* Receive data. */ 476 sink(argc, argv); 477 exit(errs != 0); 478 } 479 if (argc < 2) 480 usage(); 481 if (argc > 2) 482 targetshouldbedirectory = 1; 483 484 remin = remout = -1; 485 do_cmd_pid = -1; 486 /* Command to be executed on remote system using "ssh". */ 487 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 488 verbose_mode ? " -v" : "", 489 iamrecursive ? " -r" : "", pflag ? " -p" : "", 490 targetshouldbedirectory ? " -d" : ""); 491 492 (void) signal(SIGPIPE, lostconn); 493 494 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 495 toremote(targ, argc, argv); 496 else { 497 if (targetshouldbedirectory) 498 verifydir(argv[argc - 1]); 499 tolocal(argc, argv); /* Dest is local host. */ 500 } 501 /* 502 * Finally check the exit status of the ssh process, if one was forked 503 * and no error has occurred yet 504 */ 505 if (do_cmd_pid != -1 && errs == 0) { 506 if (remin != -1) 507 (void) close(remin); 508 if (remout != -1) 509 (void) close(remout); 510 if (waitpid(do_cmd_pid, &status, 0) == -1) 511 errs = 1; 512 else { 513 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 514 errs = 1; 515 } 516 } 517 exit(errs != 0); 518 } 519 520 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 521 static int 522 scpio(void *_cnt, size_t s) 523 { 524 off_t *cnt = (off_t *)_cnt; 525 526 *cnt += s; 527 if (limit_kbps > 0) 528 bandwidth_limit(&bwlimit, s); 529 return 0; 530 } 531 532 static int 533 do_times(int fd, int verb, const struct stat *sb) 534 { 535 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 536 char buf[(20 + 7 + 2) * 2 + 2]; 537 538 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 539 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 540 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 541 if (verb) { 542 fprintf(stderr, "File mtime %lld atime %lld\n", 543 (long long)sb->st_mtime, (long long)sb->st_atime); 544 fprintf(stderr, "Sending file timestamps: %s", buf); 545 } 546 (void) atomicio(vwrite, fd, buf, strlen(buf)); 547 return (response()); 548 } 549 550 void 551 toremote(char *targ, int argc, char **argv) 552 { 553 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 554 arglist alist; 555 int i; 556 u_int j; 557 558 memset(&alist, '\0', sizeof(alist)); 559 alist.list = NULL; 560 561 *targ++ = 0; 562 if (*targ == 0) 563 targ = "."; 564 565 arg = xstrdup(argv[argc - 1]); 566 if ((thost = strrchr(arg, '@'))) { 567 /* user@host */ 568 *thost++ = 0; 569 tuser = arg; 570 if (*tuser == '\0') 571 tuser = NULL; 572 } else { 573 thost = arg; 574 tuser = NULL; 575 } 576 577 if (tuser != NULL && !okname(tuser)) { 578 free(arg); 579 return; 580 } 581 582 for (i = 0; i < argc - 1; i++) { 583 src = colon(argv[i]); 584 if (src && throughlocal) { /* extended remote to remote */ 585 *src++ = 0; 586 if (*src == 0) 587 src = "."; 588 host = strrchr(argv[i], '@'); 589 if (host) { 590 *host++ = 0; 591 host = cleanhostname(host); 592 suser = argv[i]; 593 if (*suser == '\0') 594 suser = pwd->pw_name; 595 else if (!okname(suser)) 596 continue; 597 } else { 598 host = cleanhostname(argv[i]); 599 suser = NULL; 600 } 601 xasprintf(&bp, "%s -f %s%s", cmd, 602 *src == '-' ? "-- " : "", src); 603 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 604 exit(1); 605 free(bp); 606 host = cleanhostname(thost); 607 xasprintf(&bp, "%s -t %s%s", cmd, 608 *targ == '-' ? "-- " : "", targ); 609 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 610 exit(1); 611 free(bp); 612 (void) close(remin); 613 (void) close(remout); 614 remin = remout = -1; 615 } else if (src) { /* standard remote to remote */ 616 freeargs(&alist); 617 addargs(&alist, "%s", ssh_program); 618 addargs(&alist, "-x"); 619 addargs(&alist, "-oClearAllForwardings=yes"); 620 addargs(&alist, "-n"); 621 for (j = 0; j < remote_remote_args.num; j++) { 622 addargs(&alist, "%s", 623 remote_remote_args.list[j]); 624 } 625 *src++ = 0; 626 if (*src == 0) 627 src = "."; 628 host = strrchr(argv[i], '@'); 629 630 if (host) { 631 *host++ = 0; 632 host = cleanhostname(host); 633 suser = argv[i]; 634 if (*suser == '\0') 635 suser = pwd->pw_name; 636 else if (!okname(suser)) 637 continue; 638 addargs(&alist, "-l"); 639 addargs(&alist, "%s", suser); 640 } else { 641 host = cleanhostname(argv[i]); 642 } 643 addargs(&alist, "--"); 644 addargs(&alist, "%s", host); 645 addargs(&alist, "%s", cmd); 646 addargs(&alist, "%s", src); 647 addargs(&alist, "%s%s%s:%s", 648 tuser ? tuser : "", tuser ? "@" : "", 649 thost, targ); 650 if (do_local_cmd(&alist) != 0) 651 errs = 1; 652 } else { /* local to remote */ 653 if (remin == -1) { 654 xasprintf(&bp, "%s -t %s%s", cmd, 655 *targ == '-' ? "-- " : "", targ); 656 host = cleanhostname(thost); 657 if (do_cmd(host, tuser, bp, &remin, 658 &remout) < 0) 659 exit(1); 660 if (response() < 0) 661 exit(1); 662 free(bp); 663 } 664 source(1, argv + i); 665 } 666 } 667 free(arg); 668 } 669 670 void 671 tolocal(int argc, char **argv) 672 { 673 char *bp, *host, *src, *suser; 674 arglist alist; 675 int i; 676 677 memset(&alist, '\0', sizeof(alist)); 678 alist.list = NULL; 679 680 for (i = 0; i < argc - 1; i++) { 681 if (!(src = colon(argv[i]))) { /* Local to local. */ 682 freeargs(&alist); 683 addargs(&alist, "%s", _PATH_CP); 684 if (iamrecursive) 685 addargs(&alist, "-r"); 686 if (pflag) 687 addargs(&alist, "-p"); 688 addargs(&alist, "--"); 689 addargs(&alist, "%s", argv[i]); 690 addargs(&alist, "%s", argv[argc-1]); 691 if (do_local_cmd(&alist)) 692 ++errs; 693 continue; 694 } 695 *src++ = 0; 696 if (*src == 0) 697 src = "."; 698 if ((host = strrchr(argv[i], '@')) == NULL) { 699 host = argv[i]; 700 suser = NULL; 701 } else { 702 *host++ = 0; 703 suser = argv[i]; 704 if (*suser == '\0') 705 suser = pwd->pw_name; 706 } 707 host = cleanhostname(host); 708 xasprintf(&bp, "%s -f %s%s", 709 cmd, *src == '-' ? "-- " : "", src); 710 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 711 free(bp); 712 ++errs; 713 continue; 714 } 715 free(bp); 716 sink(1, argv + argc - 1); 717 (void) close(remin); 718 remin = remout = -1; 719 } 720 } 721 722 void 723 source(int argc, char **argv) 724 { 725 struct stat stb; 726 static BUF buffer; 727 BUF *bp; 728 off_t i, statbytes; 729 size_t amt; 730 int fd = -1, haderr, indx; 731 char *last, *name, buf[2048], encname[MAXPATHLEN]; 732 int len; 733 734 for (indx = 0; indx < argc; ++indx) { 735 name = argv[indx]; 736 statbytes = 0; 737 len = strlen(name); 738 while (len > 1 && name[len-1] == '/') 739 name[--len] = '\0'; 740 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 741 goto syserr; 742 if (strchr(name, '\n') != NULL) { 743 strnvis(encname, name, sizeof(encname), VIS_NL); 744 name = encname; 745 } 746 if (fstat(fd, &stb) < 0) { 747 syserr: run_err("%s: %s", name, strerror(errno)); 748 goto next; 749 } 750 if (stb.st_size < 0) { 751 run_err("%s: %s", name, "Negative file size"); 752 goto next; 753 } 754 unset_nonblock(fd); 755 switch (stb.st_mode & S_IFMT) { 756 case S_IFREG: 757 break; 758 case S_IFDIR: 759 if (iamrecursive) { 760 rsource(name, &stb); 761 goto next; 762 } 763 /* FALLTHROUGH */ 764 default: 765 run_err("%s: not a regular file", name); 766 goto next; 767 } 768 if ((last = strrchr(name, '/')) == NULL) 769 last = name; 770 else 771 ++last; 772 curfile = last; 773 if (pflag) { 774 if (do_times(remout, verbose_mode, &stb) < 0) 775 goto next; 776 } 777 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 778 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 779 (u_int) (stb.st_mode & FILEMODEMASK), 780 (long long)stb.st_size, last); 781 if (verbose_mode) { 782 fprintf(stderr, "Sending file modes: %s", buf); 783 } 784 (void) atomicio(vwrite, remout, buf, strlen(buf)); 785 if (response() < 0) 786 goto next; 787 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 788 next: if (fd != -1) { 789 (void) close(fd); 790 fd = -1; 791 } 792 continue; 793 } 794 if (showprogress) 795 start_progress_meter(curfile, stb.st_size, &statbytes); 796 set_nonblock(remout); 797 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 798 amt = bp->cnt; 799 if (i + (off_t)amt > stb.st_size) 800 amt = stb.st_size - i; 801 if (!haderr) { 802 if (atomicio(read, fd, bp->buf, amt) != amt) 803 haderr = errno; 804 } 805 /* Keep writing after error to retain sync */ 806 if (haderr) { 807 (void)atomicio(vwrite, remout, bp->buf, amt); 808 continue; 809 } 810 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 811 &statbytes) != amt) 812 haderr = errno; 813 } 814 unset_nonblock(remout); 815 if (showprogress) 816 stop_progress_meter(); 817 818 if (fd != -1) { 819 if (close(fd) < 0 && !haderr) 820 haderr = errno; 821 fd = -1; 822 } 823 if (!haderr) 824 (void) atomicio(vwrite, remout, "", 1); 825 else 826 run_err("%s: %s", name, strerror(haderr)); 827 (void) response(); 828 } 829 } 830 831 void 832 rsource(char *name, struct stat *statp) 833 { 834 DIR *dirp; 835 struct dirent *dp; 836 char *last, *vect[1], path[MAXPATHLEN]; 837 838 if (!(dirp = opendir(name))) { 839 run_err("%s: %s", name, strerror(errno)); 840 return; 841 } 842 last = strrchr(name, '/'); 843 if (last == 0) 844 last = name; 845 else 846 last++; 847 if (pflag) { 848 if (do_times(remout, verbose_mode, statp) < 0) { 849 closedir(dirp); 850 return; 851 } 852 } 853 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 854 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 855 if (verbose_mode) 856 fprintf(stderr, "Entering directory: %s", path); 857 (void) atomicio(vwrite, remout, path, strlen(path)); 858 if (response() < 0) { 859 closedir(dirp); 860 return; 861 } 862 while ((dp = readdir(dirp)) != NULL) { 863 if (dp->d_ino == 0) 864 continue; 865 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 866 continue; 867 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 868 run_err("%s/%s: name too long", name, dp->d_name); 869 continue; 870 } 871 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 872 vect[0] = path; 873 source(1, vect); 874 } 875 (void) closedir(dirp); 876 (void) atomicio(vwrite, remout, "E\n", 2); 877 (void) response(); 878 } 879 880 void 881 sink(int argc, char **argv) 882 { 883 static BUF buffer; 884 struct stat stb; 885 enum { 886 YES, NO, DISPLAYED 887 } wrerr; 888 BUF *bp; 889 off_t i; 890 size_t j, count; 891 int amt, exists, first, ofd; 892 mode_t mode, omode, mask; 893 off_t size, statbytes; 894 unsigned long long ull; 895 int setimes, targisdir, wrerrno = 0; 896 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; 897 struct timeval tv[2]; 898 899 #define atime tv[0] 900 #define mtime tv[1] 901 #define SCREWUP(str) { why = str; goto screwup; } 902 903 setimes = targisdir = 0; 904 mask = umask(0); 905 if (!pflag) 906 (void) umask(mask); 907 if (argc != 1) { 908 run_err("ambiguous target"); 909 exit(1); 910 } 911 targ = *argv; 912 if (targetshouldbedirectory) 913 verifydir(targ); 914 915 (void) atomicio(vwrite, remout, "", 1); 916 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 917 targisdir = 1; 918 for (first = 1;; first = 0) { 919 cp = buf; 920 if (atomicio(read, remin, cp, 1) != 1) 921 return; 922 if (*cp++ == '\n') 923 SCREWUP("unexpected <newline>"); 924 do { 925 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 926 SCREWUP("lost connection"); 927 *cp++ = ch; 928 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 929 *cp = 0; 930 if (verbose_mode) 931 fprintf(stderr, "Sink: %s", buf); 932 933 if (buf[0] == '\01' || buf[0] == '\02') { 934 if (iamremote == 0) 935 (void) atomicio(vwrite, STDERR_FILENO, 936 buf + 1, strlen(buf + 1)); 937 if (buf[0] == '\02') 938 exit(1); 939 ++errs; 940 continue; 941 } 942 if (buf[0] == 'E') { 943 (void) atomicio(vwrite, remout, "", 1); 944 return; 945 } 946 if (ch == '\n') 947 *--cp = 0; 948 949 cp = buf; 950 if (*cp == 'T') { 951 setimes++; 952 cp++; 953 if (!isdigit((unsigned char)*cp)) 954 SCREWUP("mtime.sec not present"); 955 ull = strtoull(cp, &cp, 10); 956 if (!cp || *cp++ != ' ') 957 SCREWUP("mtime.sec not delimited"); 958 if ((time_t)ull < 0 || 959 (unsigned long long)(time_t)ull != ull) 960 setimes = 0; /* out of range */ 961 mtime.tv_sec = ull; 962 mtime.tv_usec = strtol(cp, &cp, 10); 963 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 964 mtime.tv_usec > 999999) 965 SCREWUP("mtime.usec not delimited"); 966 if (!isdigit((unsigned char)*cp)) 967 SCREWUP("atime.sec not present"); 968 ull = strtoull(cp, &cp, 10); 969 if (!cp || *cp++ != ' ') 970 SCREWUP("atime.sec not delimited"); 971 if ((time_t)ull < 0 || 972 (unsigned long long)(time_t)ull != ull) 973 setimes = 0; /* out of range */ 974 atime.tv_sec = ull; 975 atime.tv_usec = strtol(cp, &cp, 10); 976 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 977 atime.tv_usec > 999999) 978 SCREWUP("atime.usec not delimited"); 979 (void) atomicio(vwrite, remout, "", 1); 980 continue; 981 } 982 if (*cp != 'C' && *cp != 'D') { 983 /* 984 * Check for the case "rcp remote:foo\* local:bar". 985 * In this case, the line "No match." can be returned 986 * by the shell before the rcp command on the remote is 987 * executed so the ^Aerror_message convention isn't 988 * followed. 989 */ 990 if (first) { 991 run_err("%s", cp); 992 exit(1); 993 } 994 SCREWUP("expected control record"); 995 } 996 mode = 0; 997 for (++cp; cp < buf + 5; cp++) { 998 if (*cp < '0' || *cp > '7') 999 SCREWUP("bad mode"); 1000 mode = (mode << 3) | (*cp - '0'); 1001 } 1002 if (*cp++ != ' ') 1003 SCREWUP("mode not delimited"); 1004 1005 for (size = 0; isdigit((unsigned char)*cp);) 1006 size = size * 10 + (*cp++ - '0'); 1007 if (*cp++ != ' ') 1008 SCREWUP("size not delimited"); 1009 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1010 run_err("error: unexpected filename: %s", cp); 1011 exit(1); 1012 } 1013 if (targisdir) { 1014 static char *namebuf; 1015 static size_t cursize; 1016 size_t need; 1017 1018 need = strlen(targ) + strlen(cp) + 250; 1019 if (need > cursize) { 1020 free(namebuf); 1021 namebuf = xmalloc(need); 1022 cursize = need; 1023 } 1024 (void) snprintf(namebuf, need, "%s%s%s", targ, 1025 strcmp(targ, "/") ? "/" : "", cp); 1026 np = namebuf; 1027 } else 1028 np = targ; 1029 curfile = cp; 1030 exists = stat(np, &stb) == 0; 1031 if (buf[0] == 'D') { 1032 int mod_flag = pflag; 1033 if (!iamrecursive) 1034 SCREWUP("received directory without -r"); 1035 if (exists) { 1036 if (!S_ISDIR(stb.st_mode)) { 1037 errno = ENOTDIR; 1038 goto bad; 1039 } 1040 if (pflag) 1041 (void) chmod(np, mode); 1042 } else { 1043 /* Handle copying from a read-only 1044 directory */ 1045 mod_flag = 1; 1046 if (mkdir(np, mode | S_IRWXU) < 0) 1047 goto bad; 1048 } 1049 vect[0] = xstrdup(np); 1050 sink(1, vect); 1051 if (setimes) { 1052 setimes = 0; 1053 if (utimes(vect[0], tv) < 0) 1054 run_err("%s: set times: %s", 1055 vect[0], strerror(errno)); 1056 } 1057 if (mod_flag) 1058 (void) chmod(vect[0], mode); 1059 free(vect[0]); 1060 continue; 1061 } 1062 omode = mode; 1063 mode |= S_IWUSR; 1064 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1065 bad: run_err("%s: %s", np, strerror(errno)); 1066 continue; 1067 } 1068 (void) atomicio(vwrite, remout, "", 1); 1069 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1070 (void) close(ofd); 1071 continue; 1072 } 1073 cp = bp->buf; 1074 wrerr = NO; 1075 1076 statbytes = 0; 1077 if (showprogress) 1078 start_progress_meter(curfile, size, &statbytes); 1079 set_nonblock(remin); 1080 for (count = i = 0; i < size; i += bp->cnt) { 1081 amt = bp->cnt; 1082 if (i + amt > size) 1083 amt = size - i; 1084 count += amt; 1085 do { 1086 j = atomicio6(read, remin, cp, amt, 1087 scpio, &statbytes); 1088 if (j == 0) { 1089 run_err("%s", j != EPIPE ? 1090 strerror(errno) : 1091 "dropped connection"); 1092 exit(1); 1093 } 1094 amt -= j; 1095 cp += j; 1096 } while (amt > 0); 1097 1098 if (count == bp->cnt) { 1099 /* Keep reading so we stay sync'd up. */ 1100 if (wrerr == NO) { 1101 if (atomicio(vwrite, ofd, bp->buf, 1102 count) != count) { 1103 wrerr = YES; 1104 wrerrno = errno; 1105 } 1106 } 1107 count = 0; 1108 cp = bp->buf; 1109 } 1110 } 1111 unset_nonblock(remin); 1112 if (showprogress) 1113 stop_progress_meter(); 1114 if (count != 0 && wrerr == NO && 1115 atomicio(vwrite, ofd, bp->buf, count) != count) { 1116 wrerr = YES; 1117 wrerrno = errno; 1118 } 1119 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1120 ftruncate(ofd, size) != 0) { 1121 run_err("%s: truncate: %s", np, strerror(errno)); 1122 wrerr = DISPLAYED; 1123 } 1124 if (pflag) { 1125 if (exists || omode != mode) 1126 if (fchmod(ofd, omode)) { 1127 run_err("%s: set mode: %s", 1128 np, strerror(errno)); 1129 wrerr = DISPLAYED; 1130 } 1131 } else { 1132 if (!exists && omode != mode) 1133 if (fchmod(ofd, omode & ~mask)) { 1134 run_err("%s: set mode: %s", 1135 np, strerror(errno)); 1136 wrerr = DISPLAYED; 1137 } 1138 } 1139 if (close(ofd) == -1) { 1140 wrerr = YES; 1141 wrerrno = errno; 1142 } 1143 (void) response(); 1144 if (setimes && wrerr == NO) { 1145 setimes = 0; 1146 if (utimes(np, tv) < 0) { 1147 run_err("%s: set times: %s", 1148 np, strerror(errno)); 1149 wrerr = DISPLAYED; 1150 } 1151 } 1152 switch (wrerr) { 1153 case YES: 1154 run_err("%s: %s", np, strerror(wrerrno)); 1155 break; 1156 case NO: 1157 (void) atomicio(vwrite, remout, "", 1); 1158 break; 1159 case DISPLAYED: 1160 break; 1161 } 1162 } 1163 screwup: 1164 run_err("protocol error: %s", why); 1165 exit(1); 1166 } 1167 1168 int 1169 response(void) 1170 { 1171 char ch, *cp, resp, rbuf[2048]; 1172 1173 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1174 lostconn(0); 1175 1176 cp = rbuf; 1177 switch (resp) { 1178 case 0: /* ok */ 1179 return (0); 1180 default: 1181 *cp++ = resp; 1182 /* FALLTHROUGH */ 1183 case 1: /* error, followed by error msg */ 1184 case 2: /* fatal error, "" */ 1185 do { 1186 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1187 lostconn(0); 1188 *cp++ = ch; 1189 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1190 1191 if (!iamremote) 1192 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1193 ++errs; 1194 if (resp == 1) 1195 return (-1); 1196 exit(1); 1197 } 1198 /* NOTREACHED */ 1199 } 1200 1201 void 1202 usage(void) 1203 { 1204 (void) fprintf(stderr, 1205 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1206 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1207 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1208 exit(1); 1209 } 1210 1211 void 1212 run_err(const char *fmt,...) 1213 { 1214 static FILE *fp; 1215 va_list ap; 1216 1217 ++errs; 1218 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1219 (void) fprintf(fp, "%c", 0x01); 1220 (void) fprintf(fp, "scp: "); 1221 va_start(ap, fmt); 1222 (void) vfprintf(fp, fmt, ap); 1223 va_end(ap); 1224 (void) fprintf(fp, "\n"); 1225 (void) fflush(fp); 1226 } 1227 1228 if (!iamremote) { 1229 va_start(ap, fmt); 1230 vfprintf(stderr, fmt, ap); 1231 va_end(ap); 1232 fprintf(stderr, "\n"); 1233 } 1234 } 1235 1236 void 1237 verifydir(char *cp) 1238 { 1239 struct stat stb; 1240 1241 if (!stat(cp, &stb)) { 1242 if (S_ISDIR(stb.st_mode)) 1243 return; 1244 errno = ENOTDIR; 1245 } 1246 run_err("%s: %s", cp, strerror(errno)); 1247 killchild(0); 1248 } 1249 1250 int 1251 okname(char *cp0) 1252 { 1253 int c; 1254 char *cp; 1255 1256 cp = cp0; 1257 do { 1258 c = (int)*cp; 1259 if (c & 0200) 1260 goto bad; 1261 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1262 switch (c) { 1263 case '\'': 1264 case '"': 1265 case '`': 1266 case ' ': 1267 case '#': 1268 goto bad; 1269 default: 1270 break; 1271 } 1272 } 1273 } while (*++cp); 1274 return (1); 1275 1276 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1277 return (0); 1278 } 1279 1280 BUF * 1281 allocbuf(BUF *bp, int fd, int blksize) 1282 { 1283 size_t size; 1284 struct stat stb; 1285 1286 if (fstat(fd, &stb) < 0) { 1287 run_err("fstat: %s", strerror(errno)); 1288 return (0); 1289 } 1290 size = roundup(stb.st_blksize, blksize); 1291 if (size == 0) 1292 size = blksize; 1293 if (bp->cnt >= size) 1294 return (bp); 1295 if (bp->buf == NULL) 1296 bp->buf = xmalloc(size); 1297 else 1298 bp->buf = xrealloc(bp->buf, 1, size); 1299 memset(bp->buf, 0, size); 1300 bp->cnt = size; 1301 return (bp); 1302 } 1303 1304 void 1305 lostconn(int signo) 1306 { 1307 if (!iamremote) 1308 (void)write(STDERR_FILENO, "lost connection\n", 16); 1309 if (signo) 1310 _exit(1); 1311 else 1312 exit(1); 1313 } 1314