1 /* $NetBSD: scp.c,v 1.6 2011/09/16 15:36:18 joerg Exp $ */ 2 /* $OpenBSD: scp.c,v 1.170 2010/12/09 14:13:33 jmc Exp $ */ 3 /* 4 * scp - secure remote copy. This is basically patched BSD rcp which 5 * uses ssh to do the data transfer (instead of using rcmd). 6 * 7 * NOTE: This version should NOT be suid root. (This uses ssh to 8 * do the transfer and ssh has the necessary privileges.) 9 * 10 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 11 * 12 * As far as I am concerned, the code I have written for this software 13 * can be used freely for any purpose. Any derived versions of this 14 * software must be clearly marked as such, and if the derived work is 15 * incompatible with the protocol description in the RFC file, it must be 16 * called by a name other than "ssh" or "Secure Shell". 17 */ 18 /* 19 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 20 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 32 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 34 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 40 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Parts from: 45 * 46 * Copyright (c) 1983, 1990, 1992, 1993, 1995 47 * The Regents of the University of California. All rights reserved. 48 * 49 * Redistribution and use in source and binary forms, with or without 50 * modification, are permitted provided that the following conditions 51 * are met: 52 * 1. Redistributions of source code must retain the above copyright 53 * notice, this list of conditions and the following disclaimer. 54 * 2. Redistributions in binary form must reproduce the above copyright 55 * notice, this list of conditions and the following disclaimer in the 56 * documentation and/or other materials provided with the distribution. 57 * 3. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 */ 74 75 #include "includes.h" 76 __RCSID("$NetBSD: scp.c,v 1.6 2011/09/16 15:36:18 joerg Exp $"); 77 #include <sys/param.h> 78 #include <sys/types.h> 79 #include <sys/poll.h> 80 #include <sys/wait.h> 81 #include <sys/stat.h> 82 #include <sys/time.h> 83 #include <sys/uio.h> 84 85 #include <ctype.h> 86 #include <dirent.h> 87 #include <errno.h> 88 #include <fcntl.h> 89 #include <pwd.h> 90 #include <signal.h> 91 #include <stdarg.h> 92 #include <stdio.h> 93 #include <stdlib.h> 94 #include <string.h> 95 #include <time.h> 96 #include <unistd.h> 97 #include <vis.h> 98 99 #include "xmalloc.h" 100 #include "atomicio.h" 101 #include "pathnames.h" 102 #include "log.h" 103 #include "misc.h" 104 #include "progressmeter.h" 105 106 #define COPY_BUFLEN 16384 107 108 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 109 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 110 111 static char dot[] = "."; 112 static char empty[] = ""; 113 114 /* Struct for addargs */ 115 arglist args; 116 arglist remote_remote_args; 117 118 /* Bandwidth limit */ 119 long long limit_kbps = 0; 120 struct bwlimit bwlimit; 121 122 /* Name of current file being transferred. */ 123 char *curfile; 124 125 /* This is set to non-zero to enable verbose mode. */ 126 int verbose_mode = 0; 127 128 /* This is set to zero if the progressmeter is not desired. */ 129 int showprogress = 1; 130 131 /* 132 * This is set to non-zero if remote-remote copy should be piped 133 * through this process. 134 */ 135 int throughlocal = 0; 136 137 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 138 #ifdef RESCUEDIR 139 const char *ssh_program = RESCUEDIR "/ssh"; 140 #else 141 const char *ssh_program = _PATH_SSH_PROGRAM; 142 #endif 143 144 /* This is used to store the pid of ssh_program */ 145 pid_t do_cmd_pid = -1; 146 147 __dead static void 148 killchild(int signo) 149 { 150 if (do_cmd_pid > 1) { 151 kill(do_cmd_pid, signo ? signo : SIGTERM); 152 waitpid(do_cmd_pid, NULL, 0); 153 } 154 155 if (signo) 156 _exit(1); 157 exit(1); 158 } 159 160 static void 161 suspchild(int signo) 162 { 163 int status; 164 165 if (do_cmd_pid > 1) { 166 kill(do_cmd_pid, signo); 167 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 168 errno == EINTR) 169 ; 170 kill(getpid(), SIGSTOP); 171 } 172 } 173 174 static int 175 do_local_cmd(arglist *a) 176 { 177 u_int i; 178 int status; 179 pid_t pid; 180 181 if (a->num == 0) 182 fatal("do_local_cmd: no arguments"); 183 184 if (verbose_mode) { 185 fprintf(stderr, "Executing:"); 186 for (i = 0; i < a->num; i++) 187 fprintf(stderr, " %s", a->list[i]); 188 fprintf(stderr, "\n"); 189 } 190 if ((pid = fork()) == -1) 191 fatal("do_local_cmd: fork: %s", strerror(errno)); 192 193 if (pid == 0) { 194 execvp(a->list[0], a->list); 195 perror(a->list[0]); 196 exit(1); 197 } 198 199 do_cmd_pid = pid; 200 signal(SIGTERM, killchild); 201 signal(SIGINT, killchild); 202 signal(SIGHUP, killchild); 203 204 while (waitpid(pid, &status, 0) == -1) 205 if (errno != EINTR) 206 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 207 208 do_cmd_pid = -1; 209 210 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 211 return (-1); 212 213 return (0); 214 } 215 216 /* 217 * This function executes the given command as the specified user on the 218 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 219 * assigns the input and output file descriptors on success. 220 */ 221 222 int 223 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 224 { 225 int pin[2], pout[2], reserved[2]; 226 227 if (verbose_mode) 228 fprintf(stderr, 229 "Executing: program %s host %s, user %s, command %s\n", 230 ssh_program, host, 231 remuser ? remuser : "(unspecified)", cmd); 232 233 /* 234 * Reserve two descriptors so that the real pipes won't get 235 * descriptors 0 and 1 because that will screw up dup2 below. 236 */ 237 if (pipe(reserved) < 0) 238 fatal("pipe: %s", strerror(errno)); 239 240 /* Create a socket pair for communicating with ssh. */ 241 if (pipe(pin) < 0) 242 fatal("pipe: %s", strerror(errno)); 243 if (pipe(pout) < 0) 244 fatal("pipe: %s", strerror(errno)); 245 246 /* Free the reserved descriptors. */ 247 close(reserved[0]); 248 close(reserved[1]); 249 250 signal(SIGTSTP, suspchild); 251 signal(SIGTTIN, suspchild); 252 signal(SIGTTOU, suspchild); 253 254 /* Fork a child to execute the command on the remote host using ssh. */ 255 do_cmd_pid = fork(); 256 if (do_cmd_pid == 0) { 257 /* Child. */ 258 close(pin[1]); 259 close(pout[0]); 260 dup2(pin[0], 0); 261 dup2(pout[1], 1); 262 close(pin[0]); 263 close(pout[1]); 264 265 replacearg(&args, 0, "%s", ssh_program); 266 if (remuser != NULL) { 267 addargs(&args, "-l"); 268 addargs(&args, "%s", remuser); 269 } 270 addargs(&args, "--"); 271 addargs(&args, "%s", host); 272 addargs(&args, "%s", cmd); 273 274 execvp(ssh_program, args.list); 275 perror(ssh_program); 276 exit(1); 277 } else if (do_cmd_pid == -1) { 278 fatal("fork: %s", strerror(errno)); 279 } 280 /* Parent. Close the other side, and return the local side. */ 281 close(pin[0]); 282 *fdout = pin[1]; 283 close(pout[1]); 284 *fdin = pout[0]; 285 signal(SIGTERM, killchild); 286 signal(SIGINT, killchild); 287 signal(SIGHUP, killchild); 288 return 0; 289 } 290 291 /* 292 * This functions executes a command simlar to do_cmd(), but expects the 293 * input and output descriptors to be setup by a previous call to do_cmd(). 294 * This way the input and output of two commands can be connected. 295 */ 296 int 297 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 298 { 299 pid_t pid; 300 int status; 301 302 if (verbose_mode) 303 fprintf(stderr, 304 "Executing: 2nd program %s host %s, user %s, command %s\n", 305 ssh_program, host, 306 remuser ? remuser : "(unspecified)", cmd); 307 308 /* Fork a child to execute the command on the remote host using ssh. */ 309 pid = fork(); 310 if (pid == 0) { 311 dup2(fdin, 0); 312 dup2(fdout, 1); 313 314 replacearg(&args, 0, "%s", ssh_program); 315 if (remuser != NULL) { 316 addargs(&args, "-l"); 317 addargs(&args, "%s", remuser); 318 } 319 addargs(&args, "--"); 320 addargs(&args, "%s", host); 321 addargs(&args, "%s", cmd); 322 323 execvp(ssh_program, args.list); 324 perror(ssh_program); 325 exit(1); 326 } else if (pid == -1) { 327 fatal("fork: %s", strerror(errno)); 328 } 329 while (waitpid(pid, &status, 0) == -1) 330 if (errno != EINTR) 331 fatal("do_cmd2: waitpid: %s", strerror(errno)); 332 return 0; 333 } 334 335 typedef struct { 336 size_t cnt; 337 char *buf; 338 } BUF; 339 340 BUF *allocbuf(BUF *, int, int); 341 __dead static void lostconn(int); 342 int okname(char *); 343 void run_err(const char *,...); 344 void verifydir(char *); 345 346 struct passwd *pwd; 347 uid_t userid; 348 int errs, remin, remout; 349 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 350 351 #define CMDNEEDS 64 352 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 353 354 int response(void); 355 void rsource(char *, struct stat *); 356 void sink(int, char *[]); 357 void source(int, char *[]); 358 static void tolocal(int, char *[]); 359 static void toremote(char *, int, char *[]); 360 __dead static void usage(void); 361 362 int 363 main(int argc, char **argv) 364 { 365 int ch, fflag, tflag, status, n; 366 char *targ, **newargv; 367 const char *errstr; 368 extern char *optarg; 369 extern int optind; 370 371 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 372 sanitise_stdfd(); 373 374 /* Copy argv, because we modify it */ 375 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 376 for (n = 0; n < argc; n++) 377 newargv[n] = xstrdup(argv[n]); 378 argv = newargv; 379 380 memset(&args, '\0', sizeof(args)); 381 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 382 args.list = remote_remote_args.list = NULL; 383 addargs(&args, "%s", ssh_program); 384 addargs(&args, "-x"); 385 addargs(&args, "-oForwardAgent=no"); 386 addargs(&args, "-oPermitLocalCommand=no"); 387 addargs(&args, "-oClearAllForwardings=yes"); 388 389 fflag = tflag = 0; 390 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 391 switch (ch) { 392 /* User-visible flags. */ 393 case '1': 394 case '2': 395 case '4': 396 case '6': 397 case 'C': 398 addargs(&args, "-%c", ch); 399 addargs(&remote_remote_args, "-%c", ch); 400 break; 401 case '3': 402 throughlocal = 1; 403 break; 404 case 'o': 405 case 'c': 406 case 'i': 407 case 'F': 408 addargs(&remote_remote_args, "-%c", ch); 409 addargs(&remote_remote_args, "%s", optarg); 410 addargs(&args, "-%c", ch); 411 addargs(&args, "%s", optarg); 412 break; 413 case 'P': 414 addargs(&remote_remote_args, "-p"); 415 addargs(&remote_remote_args, "%s", optarg); 416 addargs(&args, "-p"); 417 addargs(&args, "%s", optarg); 418 break; 419 case 'B': 420 addargs(&remote_remote_args, "-oBatchmode=yes"); 421 addargs(&args, "-oBatchmode=yes"); 422 break; 423 case 'l': 424 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 425 &errstr); 426 if (errstr != NULL) 427 usage(); 428 limit_kbps *= 1024; /* kbps */ 429 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 430 break; 431 case 'p': 432 pflag = 1; 433 break; 434 case 'r': 435 iamrecursive = 1; 436 break; 437 case 'S': 438 ssh_program = xstrdup(optarg); 439 break; 440 case 'v': 441 addargs(&args, "-v"); 442 addargs(&remote_remote_args, "-v"); 443 verbose_mode = 1; 444 break; 445 case 'q': 446 addargs(&args, "-q"); 447 addargs(&remote_remote_args, "-q"); 448 showprogress = 0; 449 break; 450 451 /* Server options. */ 452 case 'd': 453 targetshouldbedirectory = 1; 454 break; 455 case 'f': /* "from" */ 456 iamremote = 1; 457 fflag = 1; 458 break; 459 case 't': /* "to" */ 460 iamremote = 1; 461 tflag = 1; 462 break; 463 default: 464 usage(); 465 } 466 argc -= optind; 467 argv += optind; 468 469 if ((pwd = getpwuid(userid = getuid())) == NULL) 470 fatal("unknown user %u", (u_int) userid); 471 472 if (!isatty(STDOUT_FILENO)) 473 showprogress = 0; 474 475 remin = STDIN_FILENO; 476 remout = STDOUT_FILENO; 477 478 if (fflag) { 479 /* Follow "protocol", send data. */ 480 (void) response(); 481 source(argc, argv); 482 exit(errs != 0); 483 } 484 if (tflag) { 485 /* Receive data. */ 486 sink(argc, argv); 487 exit(errs != 0); 488 } 489 if (argc < 2) 490 usage(); 491 if (argc > 2) 492 targetshouldbedirectory = 1; 493 494 remin = remout = -1; 495 do_cmd_pid = -1; 496 /* Command to be executed on remote system using "ssh". */ 497 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 498 verbose_mode ? " -v" : "", 499 iamrecursive ? " -r" : "", pflag ? " -p" : "", 500 targetshouldbedirectory ? " -d" : ""); 501 502 (void) signal(SIGPIPE, lostconn); 503 504 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 505 toremote(targ, argc, argv); 506 else { 507 if (targetshouldbedirectory) 508 verifydir(argv[argc - 1]); 509 tolocal(argc, argv); /* Dest is local host. */ 510 } 511 /* 512 * Finally check the exit status of the ssh process, if one was forked 513 * and no error has occurred yet 514 */ 515 if (do_cmd_pid != -1 && errs == 0) { 516 if (remin != -1) 517 (void) close(remin); 518 if (remout != -1) 519 (void) close(remout); 520 if (waitpid(do_cmd_pid, &status, 0) == -1) 521 errs = 1; 522 else { 523 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 524 errs = 1; 525 } 526 } 527 exit(errs != 0); 528 } 529 530 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 531 static int 532 scpio(void *_cnt, size_t s) 533 { 534 off_t *cnt = (off_t *)_cnt; 535 536 *cnt += s; 537 if (limit_kbps > 0) 538 bandwidth_limit(&bwlimit, s); 539 return 0; 540 } 541 542 static void 543 toremote(char *targ, int argc, char **argv) 544 { 545 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 546 arglist alist; 547 int i; 548 u_int j; 549 550 memset(&alist, '\0', sizeof(alist)); 551 alist.list = NULL; 552 553 *targ++ = 0; 554 if (*targ == 0) 555 targ = dot; 556 557 arg = xstrdup(argv[argc - 1]); 558 if ((thost = strrchr(arg, '@'))) { 559 /* user@host */ 560 *thost++ = 0; 561 tuser = arg; 562 if (*tuser == '\0') 563 tuser = NULL; 564 } else { 565 thost = arg; 566 tuser = NULL; 567 } 568 569 if (tuser != NULL && !okname(tuser)) { 570 xfree(arg); 571 return; 572 } 573 574 for (i = 0; i < argc - 1; i++) { 575 src = colon(argv[i]); 576 if (src && throughlocal) { /* extended remote to remote */ 577 *src++ = 0; 578 if (*src == 0) 579 src = dot; 580 host = strrchr(argv[i], '@'); 581 if (host) { 582 *host++ = 0; 583 host = cleanhostname(host); 584 suser = argv[i]; 585 if (*suser == '\0') 586 suser = pwd->pw_name; 587 else if (!okname(suser)) 588 continue; 589 } else { 590 host = cleanhostname(argv[i]); 591 suser = NULL; 592 } 593 xasprintf(&bp, "%s -f -- %s", cmd, src); 594 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 595 exit(1); 596 (void) xfree(bp); 597 host = cleanhostname(thost); 598 xasprintf(&bp, "%s -t -- %s", cmd, targ); 599 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 600 exit(1); 601 (void) xfree(bp); 602 (void) close(remin); 603 (void) close(remout); 604 remin = remout = -1; 605 } else if (src) { /* standard remote to remote */ 606 freeargs(&alist); 607 addargs(&alist, "%s", ssh_program); 608 addargs(&alist, "-x"); 609 addargs(&alist, "-oClearAllForwardings=yes"); 610 addargs(&alist, "-n"); 611 for (j = 0; j < remote_remote_args.num; j++) { 612 addargs(&alist, "%s", 613 remote_remote_args.list[j]); 614 } 615 *src++ = 0; 616 if (*src == 0) 617 src = dot; 618 host = strrchr(argv[i], '@'); 619 620 if (host) { 621 *host++ = 0; 622 host = cleanhostname(host); 623 suser = argv[i]; 624 if (*suser == '\0') 625 suser = pwd->pw_name; 626 else if (!okname(suser)) 627 continue; 628 addargs(&alist, "-l"); 629 addargs(&alist, "%s", suser); 630 } else { 631 host = cleanhostname(argv[i]); 632 } 633 addargs(&alist, "--"); 634 addargs(&alist, "%s", host); 635 addargs(&alist, "%s", cmd); 636 addargs(&alist, "%s", src); 637 addargs(&alist, "%s%s%s:%s", 638 tuser ? tuser : "", tuser ? "@" : "", 639 thost, targ); 640 if (do_local_cmd(&alist) != 0) 641 errs = 1; 642 } else { /* local to remote */ 643 if (remin == -1) { 644 xasprintf(&bp, "%s -t -- %s", cmd, targ); 645 host = cleanhostname(thost); 646 if (do_cmd(host, tuser, bp, &remin, 647 &remout) < 0) 648 exit(1); 649 if (response() < 0) 650 exit(1); 651 (void) xfree(bp); 652 } 653 source(1, argv + i); 654 } 655 } 656 xfree(arg); 657 } 658 659 static void 660 tolocal(int argc, char **argv) 661 { 662 char *bp, *host, *src, *suser; 663 arglist alist; 664 int i; 665 666 memset(&alist, '\0', sizeof(alist)); 667 alist.list = NULL; 668 669 for (i = 0; i < argc - 1; i++) { 670 if (!(src = colon(argv[i]))) { /* Local to local. */ 671 freeargs(&alist); 672 addargs(&alist, "%s", _PATH_CP); 673 if (iamrecursive) 674 addargs(&alist, "-r"); 675 if (pflag) 676 addargs(&alist, "-p"); 677 addargs(&alist, "--"); 678 addargs(&alist, "%s", argv[i]); 679 addargs(&alist, "%s", argv[argc-1]); 680 if (do_local_cmd(&alist)) 681 ++errs; 682 continue; 683 } 684 *src++ = 0; 685 if (*src == 0) 686 src = dot; 687 if ((host = strrchr(argv[i], '@')) == NULL) { 688 host = argv[i]; 689 suser = NULL; 690 } else { 691 *host++ = 0; 692 suser = argv[i]; 693 if (*suser == '\0') 694 suser = pwd->pw_name; 695 } 696 host = cleanhostname(host); 697 xasprintf(&bp, "%s -f -- %s", cmd, src); 698 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 699 (void) xfree(bp); 700 ++errs; 701 continue; 702 } 703 xfree(bp); 704 sink(1, argv + argc - 1); 705 (void) close(remin); 706 remin = remout = -1; 707 } 708 } 709 710 void 711 source(int argc, char **argv) 712 { 713 struct stat stb; 714 static BUF buffer; 715 BUF *bp; 716 off_t i, statbytes; 717 size_t amt; 718 int fd = -1, haderr, indx; 719 char *last, *name, buf[16384], encname[MAXPATHLEN]; 720 int len; 721 722 for (indx = 0; indx < argc; ++indx) { 723 fd = -1; 724 name = argv[indx]; 725 statbytes = 0; 726 len = strlen(name); 727 while (len > 1 && name[len-1] == '/') 728 name[--len] = '\0'; 729 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 730 goto syserr; 731 if (strchr(name, '\n') != NULL) { 732 strvisx(encname, name, len, VIS_NL); 733 name = encname; 734 } 735 if (fstat(fd, &stb) < 0) { 736 syserr: run_err("%s: %s", name, strerror(errno)); 737 goto next; 738 } 739 if (stb.st_size < 0) { 740 run_err("%s: %s", name, "Negative file size"); 741 goto next; 742 } 743 unset_nonblock(fd); 744 switch (stb.st_mode & S_IFMT) { 745 case S_IFREG: 746 break; 747 case S_IFDIR: 748 if (iamrecursive) { 749 rsource(name, &stb); 750 goto next; 751 } 752 /* FALLTHROUGH */ 753 default: 754 run_err("%s: not a regular file", name); 755 goto next; 756 } 757 if ((last = strrchr(name, '/')) == NULL) 758 last = name; 759 else 760 ++last; 761 curfile = last; 762 if (pflag) { 763 /* 764 * Make it compatible with possible future 765 * versions expecting microseconds. 766 */ 767 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", 768 (u_long) (stb.st_mtime < 0 ? 0 : stb.st_mtime), 769 (u_long) (stb.st_atime < 0 ? 0 : stb.st_atime)); 770 if (verbose_mode) { 771 fprintf(stderr, "File mtime %ld atime %ld\n", 772 (long)stb.st_mtime, (long)stb.st_atime); 773 fprintf(stderr, "Sending file timestamps: %s", 774 buf); 775 } 776 (void) atomicio(vwrite, remout, buf, strlen(buf)); 777 if (response() < 0) 778 goto next; 779 } 780 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 781 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 782 (u_int) (stb.st_mode & FILEMODEMASK), 783 (long long)stb.st_size, last); 784 if (verbose_mode) { 785 fprintf(stderr, "Sending file modes: %s", buf); 786 } 787 (void) atomicio(vwrite, remout, buf, strlen(buf)); 788 if (response() < 0) 789 goto next; 790 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 791 next: if (fd != -1) { 792 (void) close(fd); 793 fd = -1; 794 } 795 continue; 796 } 797 if (showprogress) 798 start_progress_meter(curfile, stb.st_size, &statbytes); 799 set_nonblock(remout); 800 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 801 amt = bp->cnt; 802 if (i + (off_t)amt > stb.st_size) 803 amt = stb.st_size - i; 804 if (!haderr) { 805 if (atomicio(read, fd, bp->buf, amt) != amt) 806 haderr = errno; 807 } 808 /* Keep writing after error to retain sync */ 809 if (haderr) { 810 (void)atomicio(vwrite, remout, bp->buf, amt); 811 continue; 812 } 813 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 814 &statbytes) != amt) 815 haderr = errno; 816 } 817 unset_nonblock(remout); 818 if (showprogress) 819 stop_progress_meter(); 820 821 if (fd != -1) { 822 if (close(fd) < 0 && !haderr) 823 haderr = errno; 824 fd = -1; 825 } 826 if (!haderr) 827 (void) atomicio(vwrite, remout, empty, 1); 828 else 829 run_err("%s: %s", name, strerror(haderr)); 830 (void) response(); 831 } 832 } 833 834 void 835 rsource(char *name, struct stat *statp) 836 { 837 DIR *dirp; 838 struct dirent *dp; 839 char *last, *vect[1], path[1100]; 840 841 if (!(dirp = opendir(name))) { 842 run_err("%s: %s", name, strerror(errno)); 843 return; 844 } 845 last = strrchr(name, '/'); 846 if (last == 0) 847 last = name; 848 else 849 last++; 850 if (pflag) { 851 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", 852 (u_long) statp->st_mtime, 853 (u_long) statp->st_atime); 854 (void) atomicio(vwrite, remout, path, strlen(path)); 855 if (response() < 0) { 856 closedir(dirp); 857 return; 858 } 859 } 860 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 861 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 862 if (verbose_mode) 863 fprintf(stderr, "Entering directory: %s", path); 864 (void) atomicio(vwrite, remout, path, strlen(path)); 865 if (response() < 0) { 866 closedir(dirp); 867 return; 868 } 869 while ((dp = readdir(dirp)) != NULL) { 870 if (dp->d_ino == 0) 871 continue; 872 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 873 continue; 874 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 875 run_err("%s/%s: name too long", name, dp->d_name); 876 continue; 877 } 878 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 879 vect[0] = path; 880 source(1, vect); 881 } 882 (void) closedir(dirp); 883 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 884 (void) response(); 885 } 886 887 void 888 sink(int argc, char **argv) 889 { 890 static BUF buffer; 891 struct stat stb; 892 enum { 893 YES, NO, DISPLAYED 894 } wrerr; 895 BUF *bp; 896 off_t i; 897 size_t j, count; 898 int amt, exists, first, ofd; 899 mode_t mode, omode, mask; 900 off_t size, statbytes; 901 int setimes, targisdir, wrerrno = 0; 902 char ch, *cp, *np, *targ, *vect[1], buf[16384]; 903 const char *why; 904 struct timeval tv[2]; 905 906 #define atime tv[0] 907 #define mtime tv[1] 908 #define SCREWUP(str) { why = str; goto screwup; } 909 910 setimes = targisdir = 0; 911 mask = umask(0); 912 if (!pflag) 913 (void) umask(mask); 914 if (argc != 1) { 915 run_err("ambiguous target"); 916 exit(1); 917 } 918 targ = *argv; 919 if (targetshouldbedirectory) 920 verifydir(targ); 921 922 (void) atomicio(vwrite, remout, empty, 1); 923 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 924 targisdir = 1; 925 for (first = 1;; first = 0) { 926 cp = buf; 927 if (atomicio(read, remin, cp, 1) != 1) 928 return; 929 if (*cp++ == '\n') 930 SCREWUP("unexpected <newline>"); 931 do { 932 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 933 SCREWUP("lost connection"); 934 *cp++ = ch; 935 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 936 *cp = 0; 937 if (verbose_mode) 938 fprintf(stderr, "Sink: %s", buf); 939 940 if (buf[0] == '\01' || buf[0] == '\02') { 941 if (iamremote == 0) 942 (void) atomicio(vwrite, STDERR_FILENO, 943 buf + 1, strlen(buf + 1)); 944 if (buf[0] == '\02') 945 exit(1); 946 ++errs; 947 continue; 948 } 949 if (buf[0] == 'E') { 950 (void) atomicio(vwrite, remout, empty, 1); 951 return; 952 } 953 if (ch == '\n') 954 *--cp = 0; 955 956 cp = buf; 957 if (*cp == 'T') { 958 setimes++; 959 cp++; 960 mtime.tv_sec = strtol(cp, &cp, 10); 961 if (!cp || *cp++ != ' ') 962 SCREWUP("mtime.sec not delimited"); 963 mtime.tv_usec = strtol(cp, &cp, 10); 964 if (!cp || *cp++ != ' ') 965 SCREWUP("mtime.usec not delimited"); 966 atime.tv_sec = strtol(cp, &cp, 10); 967 if (!cp || *cp++ != ' ') 968 SCREWUP("atime.sec not delimited"); 969 atime.tv_usec = strtol(cp, &cp, 10); 970 if (!cp || *cp++ != '\0') 971 SCREWUP("atime.usec not delimited"); 972 (void) atomicio(vwrite, remout, empty, 1); 973 continue; 974 } 975 if (*cp != 'C' && *cp != 'D') { 976 /* 977 * Check for the case "rcp remote:foo\* local:bar". 978 * In this case, the line "No match." can be returned 979 * by the shell before the rcp command on the remote is 980 * executed so the ^Aerror_message convention isn't 981 * followed. 982 */ 983 if (first) { 984 run_err("%s", cp); 985 exit(1); 986 } 987 SCREWUP("expected control record"); 988 } 989 mode = 0; 990 for (++cp; cp < buf + 5; cp++) { 991 if (*cp < '0' || *cp > '7') 992 SCREWUP("bad mode"); 993 mode = (mode << 3) | (*cp - '0'); 994 } 995 if (*cp++ != ' ') 996 SCREWUP("mode not delimited"); 997 998 for (size = 0; isdigit((unsigned char)*cp);) 999 size = size * 10 + (*cp++ - '0'); 1000 if (*cp++ != ' ') 1001 SCREWUP("size not delimited"); 1002 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1003 run_err("error: unexpected filename: %s", cp); 1004 exit(1); 1005 } 1006 if (targisdir) { 1007 static char *namebuf; 1008 static size_t cursize; 1009 size_t need; 1010 1011 need = strlen(targ) + strlen(cp) + 250; 1012 if (need > cursize) { 1013 if (namebuf) 1014 xfree(namebuf); 1015 namebuf = xmalloc(need); 1016 cursize = need; 1017 } 1018 (void) snprintf(namebuf, need, "%s%s%s", targ, 1019 strcmp(targ, "/") ? "/" : "", cp); 1020 np = namebuf; 1021 } else 1022 np = targ; 1023 curfile = cp; 1024 exists = stat(np, &stb) == 0; 1025 if (buf[0] == 'D') { 1026 int mod_flag = pflag; 1027 if (!iamrecursive) 1028 SCREWUP("received directory without -r"); 1029 if (exists) { 1030 if (!S_ISDIR(stb.st_mode)) { 1031 errno = ENOTDIR; 1032 goto bad; 1033 } 1034 if (pflag) 1035 (void) chmod(np, mode); 1036 } else { 1037 /* Handle copying from a read-only 1038 directory */ 1039 mod_flag = 1; 1040 if (mkdir(np, mode | S_IRWXU) < 0) 1041 goto bad; 1042 } 1043 vect[0] = xstrdup(np); 1044 sink(1, vect); 1045 if (setimes) { 1046 setimes = 0; 1047 if (utimes(vect[0], tv) < 0) 1048 run_err("%s: set times: %s", 1049 vect[0], strerror(errno)); 1050 } 1051 if (mod_flag) 1052 (void) chmod(vect[0], mode); 1053 if (vect[0]) 1054 xfree(vect[0]); 1055 continue; 1056 } 1057 omode = mode; 1058 mode |= S_IWRITE; 1059 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1060 bad: run_err("%s: %s", np, strerror(errno)); 1061 continue; 1062 } 1063 (void) atomicio(vwrite, remout, empty, 1); 1064 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1065 (void) close(ofd); 1066 continue; 1067 } 1068 cp = bp->buf; 1069 wrerr = NO; 1070 1071 statbytes = 0; 1072 if (showprogress) 1073 start_progress_meter(curfile, size, &statbytes); 1074 set_nonblock(remin); 1075 for (count = i = 0; i < size; i += bp->cnt) { 1076 amt = bp->cnt; 1077 if (i + amt > size) 1078 amt = size - i; 1079 count += amt; 1080 do { 1081 j = atomicio6(read, remin, cp, amt, 1082 scpio, &statbytes); 1083 if (j == 0) { 1084 run_err("%s", j != EPIPE ? 1085 strerror(errno) : 1086 "dropped connection"); 1087 exit(1); 1088 } 1089 amt -= j; 1090 cp += j; 1091 } while (amt > 0); 1092 1093 if (count == bp->cnt) { 1094 /* Keep reading so we stay sync'd up. */ 1095 if (wrerr == NO) { 1096 if (atomicio(vwrite, ofd, bp->buf, 1097 count) != count) { 1098 wrerr = YES; 1099 wrerrno = errno; 1100 } 1101 } 1102 count = 0; 1103 cp = bp->buf; 1104 } 1105 } 1106 unset_nonblock(remin); 1107 if (showprogress) 1108 stop_progress_meter(); 1109 if (count != 0 && wrerr == NO && 1110 atomicio(vwrite, ofd, bp->buf, count) != count) { 1111 wrerr = YES; 1112 wrerrno = errno; 1113 } 1114 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1115 ftruncate(ofd, size) != 0) { 1116 run_err("%s: truncate: %s", np, strerror(errno)); 1117 wrerr = DISPLAYED; 1118 } 1119 if (pflag) { 1120 if (exists || omode != mode) 1121 if (fchmod(ofd, omode)) { 1122 run_err("%s: set mode: %s", 1123 np, strerror(errno)); 1124 wrerr = DISPLAYED; 1125 } 1126 } else { 1127 if (!exists && omode != mode) 1128 if (fchmod(ofd, omode & ~mask)) { 1129 run_err("%s: set mode: %s", 1130 np, strerror(errno)); 1131 wrerr = DISPLAYED; 1132 } 1133 } 1134 if (close(ofd) == -1) { 1135 wrerr = YES; 1136 wrerrno = errno; 1137 } 1138 (void) response(); 1139 if (setimes && wrerr == NO) { 1140 setimes = 0; 1141 if (utimes(np, tv) < 0) { 1142 run_err("%s: set times: %s", 1143 np, strerror(errno)); 1144 wrerr = DISPLAYED; 1145 } 1146 } 1147 switch (wrerr) { 1148 case YES: 1149 run_err("%s: %s", np, strerror(wrerrno)); 1150 break; 1151 case NO: 1152 (void) atomicio(vwrite, remout, empty, 1); 1153 break; 1154 case DISPLAYED: 1155 break; 1156 } 1157 } 1158 screwup: 1159 run_err("protocol error: %s", why); 1160 exit(1); 1161 } 1162 1163 int 1164 response(void) 1165 { 1166 char ch, *cp, resp, rbuf[2048]; 1167 1168 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1169 lostconn(0); 1170 1171 cp = rbuf; 1172 switch (resp) { 1173 case 0: /* ok */ 1174 return (0); 1175 default: 1176 *cp++ = resp; 1177 /* FALLTHROUGH */ 1178 case 1: /* error, followed by error msg */ 1179 case 2: /* fatal error, "" */ 1180 do { 1181 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1182 lostconn(0); 1183 *cp++ = ch; 1184 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1185 1186 if (!iamremote) 1187 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1188 ++errs; 1189 if (resp == 1) 1190 return (-1); 1191 exit(1); 1192 } 1193 /* NOTREACHED */ 1194 } 1195 1196 void 1197 usage(void) 1198 { 1199 (void) fprintf(stderr, 1200 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1201 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1202 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1203 exit(1); 1204 } 1205 1206 void 1207 run_err(const char *fmt,...) 1208 { 1209 static FILE *fp; 1210 va_list ap; 1211 1212 ++errs; 1213 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1214 (void) fprintf(fp, "%c", 0x01); 1215 (void) fprintf(fp, "scp: "); 1216 va_start(ap, fmt); 1217 (void) vfprintf(fp, fmt, ap); 1218 va_end(ap); 1219 (void) fprintf(fp, "\n"); 1220 (void) fflush(fp); 1221 } 1222 1223 if (!iamremote) { 1224 va_start(ap, fmt); 1225 vfprintf(stderr, fmt, ap); 1226 va_end(ap); 1227 fprintf(stderr, "\n"); 1228 } 1229 } 1230 1231 void 1232 verifydir(char *cp) 1233 { 1234 struct stat stb; 1235 1236 if (!stat(cp, &stb)) { 1237 if (S_ISDIR(stb.st_mode)) 1238 return; 1239 errno = ENOTDIR; 1240 } 1241 run_err("%s: %s", cp, strerror(errno)); 1242 killchild(0); 1243 } 1244 1245 int 1246 okname(char *cp0) 1247 { 1248 int c; 1249 char *cp; 1250 1251 cp = cp0; 1252 do { 1253 c = (int)*cp; 1254 if (c & 0200) 1255 goto bad; 1256 if (!isalpha(c) && !isdigit(c)) { 1257 switch (c) { 1258 case '\'': 1259 case '"': 1260 case '`': 1261 case ' ': 1262 case '#': 1263 goto bad; 1264 default: 1265 break; 1266 } 1267 } 1268 } while (*++cp); 1269 return (1); 1270 1271 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1272 return (0); 1273 } 1274 1275 BUF * 1276 allocbuf(BUF *bp, int fd, int blksize) 1277 { 1278 size_t size; 1279 struct stat stb; 1280 1281 if (fstat(fd, &stb) < 0) { 1282 run_err("fstat: %s", strerror(errno)); 1283 return (0); 1284 } 1285 size = roundup(stb.st_blksize, blksize); 1286 if (size == 0) 1287 size = blksize; 1288 if (bp->cnt >= size) 1289 return (bp); 1290 if (bp->buf == NULL) 1291 bp->buf = xmalloc(size); 1292 else 1293 bp->buf = xrealloc(bp->buf, 1, size); 1294 memset(bp->buf, 0, size); 1295 bp->cnt = size; 1296 return (bp); 1297 } 1298 1299 static void 1300 lostconn(int signo) 1301 { 1302 if (!iamremote) 1303 write(STDERR_FILENO, "lost connection\n", 16); 1304 if (signo) 1305 _exit(1); 1306 else 1307 exit(1); 1308 } 1309