1 /* $NetBSD: scp.c,v 1.8 2013/04/12 18:09:19 joerg Exp $ */ 2 /* $OpenBSD: scp.c,v 1.171 2011/09/09 22:37:01 djm 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 1.8 2013/04/12 18:09:19 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 *,...) __printflike(1, 2); 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%s", cmd, 594 *src == '-' ? "-- " : "", src); 595 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 596 exit(1); 597 (void) xfree(bp); 598 host = cleanhostname(thost); 599 xasprintf(&bp, "%s -t %s%s", cmd, 600 *targ == '-' ? "-- " : "", targ); 601 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 602 exit(1); 603 (void) xfree(bp); 604 (void) close(remin); 605 (void) close(remout); 606 remin = remout = -1; 607 } else if (src) { /* standard remote to remote */ 608 freeargs(&alist); 609 addargs(&alist, "%s", ssh_program); 610 addargs(&alist, "-x"); 611 addargs(&alist, "-oClearAllForwardings=yes"); 612 addargs(&alist, "-n"); 613 for (j = 0; j < remote_remote_args.num; j++) { 614 addargs(&alist, "%s", 615 remote_remote_args.list[j]); 616 } 617 *src++ = 0; 618 if (*src == 0) 619 src = dot; 620 host = strrchr(argv[i], '@'); 621 622 if (host) { 623 *host++ = 0; 624 host = cleanhostname(host); 625 suser = argv[i]; 626 if (*suser == '\0') 627 suser = pwd->pw_name; 628 else if (!okname(suser)) 629 continue; 630 addargs(&alist, "-l"); 631 addargs(&alist, "%s", suser); 632 } else { 633 host = cleanhostname(argv[i]); 634 } 635 addargs(&alist, "--"); 636 addargs(&alist, "%s", host); 637 addargs(&alist, "%s", cmd); 638 addargs(&alist, "%s", src); 639 addargs(&alist, "%s%s%s:%s", 640 tuser ? tuser : "", tuser ? "@" : "", 641 thost, targ); 642 if (do_local_cmd(&alist) != 0) 643 errs = 1; 644 } else { /* local to remote */ 645 if (remin == -1) { 646 xasprintf(&bp, "%s -t %s%s", cmd, 647 *targ == '-' ? "-- " : "", targ); 648 host = cleanhostname(thost); 649 if (do_cmd(host, tuser, bp, &remin, 650 &remout) < 0) 651 exit(1); 652 if (response() < 0) 653 exit(1); 654 (void) xfree(bp); 655 } 656 source(1, argv + i); 657 } 658 } 659 xfree(arg); 660 } 661 662 static void 663 tolocal(int argc, char **argv) 664 { 665 char *bp, *host, *src, *suser; 666 arglist alist; 667 int i; 668 669 memset(&alist, '\0', sizeof(alist)); 670 alist.list = NULL; 671 672 for (i = 0; i < argc - 1; i++) { 673 if (!(src = colon(argv[i]))) { /* Local to local. */ 674 freeargs(&alist); 675 addargs(&alist, "%s", _PATH_CP); 676 if (iamrecursive) 677 addargs(&alist, "-r"); 678 if (pflag) 679 addargs(&alist, "-p"); 680 addargs(&alist, "--"); 681 addargs(&alist, "%s", argv[i]); 682 addargs(&alist, "%s", argv[argc-1]); 683 if (do_local_cmd(&alist)) 684 ++errs; 685 continue; 686 } 687 *src++ = 0; 688 if (*src == 0) 689 src = dot; 690 if ((host = strrchr(argv[i], '@')) == NULL) { 691 host = argv[i]; 692 suser = NULL; 693 } else { 694 *host++ = 0; 695 suser = argv[i]; 696 if (*suser == '\0') 697 suser = pwd->pw_name; 698 } 699 host = cleanhostname(host); 700 xasprintf(&bp, "%s -f %s%s", 701 cmd, *src == '-' ? "-- " : "", src); 702 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 703 (void) xfree(bp); 704 ++errs; 705 continue; 706 } 707 xfree(bp); 708 sink(1, argv + argc - 1); 709 (void) close(remin); 710 remin = remout = -1; 711 } 712 } 713 714 void 715 source(int argc, char **argv) 716 { 717 struct stat stb; 718 static BUF buffer; 719 BUF *bp; 720 off_t i, statbytes; 721 size_t amt; 722 int fd = -1, haderr, indx; 723 char *last, *name, buf[16384], encname[MAXPATHLEN]; 724 int len; 725 726 for (indx = 0; indx < argc; ++indx) { 727 fd = -1; 728 name = argv[indx]; 729 statbytes = 0; 730 len = strlen(name); 731 while (len > 1 && name[len-1] == '/') 732 name[--len] = '\0'; 733 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 734 goto syserr; 735 if (strchr(name, '\n') != NULL) { 736 strvisx(encname, name, len, VIS_NL); 737 name = encname; 738 } 739 if (fstat(fd, &stb) < 0) { 740 syserr: run_err("%s: %s", name, strerror(errno)); 741 goto next; 742 } 743 if (stb.st_size < 0) { 744 run_err("%s: %s", name, "Negative file size"); 745 goto next; 746 } 747 unset_nonblock(fd); 748 switch (stb.st_mode & S_IFMT) { 749 case S_IFREG: 750 break; 751 case S_IFDIR: 752 if (iamrecursive) { 753 rsource(name, &stb); 754 goto next; 755 } 756 /* FALLTHROUGH */ 757 default: 758 run_err("%s: not a regular file", name); 759 goto next; 760 } 761 if ((last = strrchr(name, '/')) == NULL) 762 last = name; 763 else 764 ++last; 765 curfile = last; 766 if (pflag) { 767 /* 768 * Make it compatible with possible future 769 * versions expecting microseconds. 770 */ 771 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", 772 (u_long) (stb.st_mtime < 0 ? 0 : stb.st_mtime), 773 (u_long) (stb.st_atime < 0 ? 0 : stb.st_atime)); 774 if (verbose_mode) { 775 fprintf(stderr, "File mtime %ld atime %ld\n", 776 (long)stb.st_mtime, (long)stb.st_atime); 777 fprintf(stderr, "Sending file timestamps: %s", 778 buf); 779 } 780 (void) atomicio(vwrite, remout, buf, strlen(buf)); 781 if (response() < 0) 782 goto next; 783 } 784 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 785 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 786 (u_int) (stb.st_mode & FILEMODEMASK), 787 (long long)stb.st_size, last); 788 if (verbose_mode) { 789 fprintf(stderr, "Sending file modes: %s", buf); 790 } 791 (void) atomicio(vwrite, remout, buf, strlen(buf)); 792 if (response() < 0) 793 goto next; 794 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 795 next: if (fd != -1) { 796 (void) close(fd); 797 fd = -1; 798 } 799 continue; 800 } 801 if (showprogress) 802 start_progress_meter(curfile, stb.st_size, &statbytes); 803 set_nonblock(remout); 804 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 805 amt = bp->cnt; 806 if (i + (off_t)amt > stb.st_size) 807 amt = stb.st_size - i; 808 if (!haderr) { 809 if (atomicio(read, fd, bp->buf, amt) != amt) 810 haderr = errno; 811 } 812 /* Keep writing after error to retain sync */ 813 if (haderr) { 814 (void)atomicio(vwrite, remout, bp->buf, amt); 815 continue; 816 } 817 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 818 &statbytes) != amt) 819 haderr = errno; 820 } 821 unset_nonblock(remout); 822 if (showprogress) 823 stop_progress_meter(); 824 825 if (fd != -1) { 826 if (close(fd) < 0 && !haderr) 827 haderr = errno; 828 fd = -1; 829 } 830 if (!haderr) 831 (void) atomicio(vwrite, remout, empty, 1); 832 else 833 run_err("%s: %s", name, strerror(haderr)); 834 (void) response(); 835 } 836 } 837 838 void 839 rsource(char *name, struct stat *statp) 840 { 841 DIR *dirp; 842 struct dirent *dp; 843 char *last, *vect[1], path[1100]; 844 845 if (!(dirp = opendir(name))) { 846 run_err("%s: %s", name, strerror(errno)); 847 return; 848 } 849 last = strrchr(name, '/'); 850 if (last == 0) 851 last = name; 852 else 853 last++; 854 if (pflag) { 855 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", 856 (u_long) statp->st_mtime, 857 (u_long) statp->st_atime); 858 (void) atomicio(vwrite, remout, path, strlen(path)); 859 if (response() < 0) { 860 closedir(dirp); 861 return; 862 } 863 } 864 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 865 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 866 if (verbose_mode) 867 fprintf(stderr, "Entering directory: %s", path); 868 (void) atomicio(vwrite, remout, path, strlen(path)); 869 if (response() < 0) { 870 closedir(dirp); 871 return; 872 } 873 while ((dp = readdir(dirp)) != NULL) { 874 if (dp->d_ino == 0) 875 continue; 876 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 877 continue; 878 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 879 run_err("%s/%s: name too long", name, dp->d_name); 880 continue; 881 } 882 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 883 vect[0] = path; 884 source(1, vect); 885 } 886 (void) closedir(dirp); 887 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 888 (void) response(); 889 } 890 891 void 892 sink(int argc, char **argv) 893 { 894 static BUF buffer; 895 struct stat stb; 896 enum { 897 YES, NO, DISPLAYED 898 } wrerr; 899 BUF *bp; 900 off_t i; 901 size_t j, count; 902 int amt, exists, first, ofd; 903 mode_t mode, omode, mask; 904 off_t size, statbytes; 905 int setimes, targisdir, wrerrno = 0; 906 char ch, *cp, *np, *targ, *vect[1], buf[16384]; 907 const char *why; 908 struct timeval tv[2]; 909 910 #define atime tv[0] 911 #define mtime tv[1] 912 #define SCREWUP(str) { why = str; goto screwup; } 913 914 setimes = targisdir = 0; 915 mask = umask(0); 916 if (!pflag) 917 (void) umask(mask); 918 if (argc != 1) { 919 run_err("ambiguous target"); 920 exit(1); 921 } 922 targ = *argv; 923 if (targetshouldbedirectory) 924 verifydir(targ); 925 926 (void) atomicio(vwrite, remout, empty, 1); 927 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 928 targisdir = 1; 929 for (first = 1;; first = 0) { 930 cp = buf; 931 if (atomicio(read, remin, cp, 1) != 1) 932 return; 933 if (*cp++ == '\n') 934 SCREWUP("unexpected <newline>"); 935 do { 936 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 937 SCREWUP("lost connection"); 938 *cp++ = ch; 939 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 940 *cp = 0; 941 if (verbose_mode) 942 fprintf(stderr, "Sink: %s", buf); 943 944 if (buf[0] == '\01' || buf[0] == '\02') { 945 if (iamremote == 0) 946 (void) atomicio(vwrite, STDERR_FILENO, 947 buf + 1, strlen(buf + 1)); 948 if (buf[0] == '\02') 949 exit(1); 950 ++errs; 951 continue; 952 } 953 if (buf[0] == 'E') { 954 (void) atomicio(vwrite, remout, empty, 1); 955 return; 956 } 957 if (ch == '\n') 958 *--cp = 0; 959 960 cp = buf; 961 if (*cp == 'T') { 962 setimes++; 963 cp++; 964 mtime.tv_sec = strtol(cp, &cp, 10); 965 if (!cp || *cp++ != ' ') 966 SCREWUP("mtime.sec not delimited"); 967 mtime.tv_usec = strtol(cp, &cp, 10); 968 if (!cp || *cp++ != ' ') 969 SCREWUP("mtime.usec not delimited"); 970 atime.tv_sec = strtol(cp, &cp, 10); 971 if (!cp || *cp++ != ' ') 972 SCREWUP("atime.sec not delimited"); 973 atime.tv_usec = strtol(cp, &cp, 10); 974 if (!cp || *cp++ != '\0') 975 SCREWUP("atime.usec not delimited"); 976 (void) atomicio(vwrite, remout, empty, 1); 977 continue; 978 } 979 if (*cp != 'C' && *cp != 'D') { 980 /* 981 * Check for the case "rcp remote:foo\* local:bar". 982 * In this case, the line "No match." can be returned 983 * by the shell before the rcp command on the remote is 984 * executed so the ^Aerror_message convention isn't 985 * followed. 986 */ 987 if (first) { 988 run_err("%s", cp); 989 exit(1); 990 } 991 SCREWUP("expected control record"); 992 } 993 mode = 0; 994 for (++cp; cp < buf + 5; cp++) { 995 if (*cp < '0' || *cp > '7') 996 SCREWUP("bad mode"); 997 mode = (mode << 3) | (*cp - '0'); 998 } 999 if (*cp++ != ' ') 1000 SCREWUP("mode not delimited"); 1001 1002 for (size = 0; isdigit((unsigned char)*cp);) 1003 size = size * 10 + (*cp++ - '0'); 1004 if (*cp++ != ' ') 1005 SCREWUP("size not delimited"); 1006 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1007 run_err("error: unexpected filename: %s", cp); 1008 exit(1); 1009 } 1010 if (targisdir) { 1011 static char *namebuf; 1012 static size_t cursize; 1013 size_t need; 1014 1015 need = strlen(targ) + strlen(cp) + 250; 1016 if (need > cursize) { 1017 if (namebuf) 1018 xfree(namebuf); 1019 namebuf = xmalloc(need); 1020 cursize = need; 1021 } 1022 (void) snprintf(namebuf, need, "%s%s%s", targ, 1023 strcmp(targ, "/") ? "/" : "", cp); 1024 np = namebuf; 1025 } else 1026 np = targ; 1027 curfile = cp; 1028 exists = stat(np, &stb) == 0; 1029 if (buf[0] == 'D') { 1030 int mod_flag = pflag; 1031 if (!iamrecursive) 1032 SCREWUP("received directory without -r"); 1033 if (exists) { 1034 if (!S_ISDIR(stb.st_mode)) { 1035 errno = ENOTDIR; 1036 goto bad; 1037 } 1038 if (pflag) 1039 (void) chmod(np, mode); 1040 } else { 1041 /* Handle copying from a read-only 1042 directory */ 1043 mod_flag = 1; 1044 if (mkdir(np, mode | S_IRWXU) < 0) 1045 goto bad; 1046 } 1047 vect[0] = xstrdup(np); 1048 sink(1, vect); 1049 if (setimes) { 1050 setimes = 0; 1051 if (utimes(vect[0], tv) < 0) 1052 run_err("%s: set times: %s", 1053 vect[0], strerror(errno)); 1054 } 1055 if (mod_flag) 1056 (void) chmod(vect[0], mode); 1057 if (vect[0]) 1058 xfree(vect[0]); 1059 continue; 1060 } 1061 omode = mode; 1062 mode |= S_IWRITE; 1063 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1064 bad: run_err("%s: %s", np, strerror(errno)); 1065 continue; 1066 } 1067 (void) atomicio(vwrite, remout, empty, 1); 1068 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1069 (void) close(ofd); 1070 continue; 1071 } 1072 cp = bp->buf; 1073 wrerr = NO; 1074 1075 statbytes = 0; 1076 if (showprogress) 1077 start_progress_meter(curfile, size, &statbytes); 1078 set_nonblock(remin); 1079 for (count = i = 0; i < size; i += bp->cnt) { 1080 amt = bp->cnt; 1081 if (i + amt > size) 1082 amt = size - i; 1083 count += amt; 1084 do { 1085 j = atomicio6(read, remin, cp, amt, 1086 scpio, &statbytes); 1087 if (j == 0) { 1088 run_err("%s", j != EPIPE ? 1089 strerror(errno) : 1090 "dropped connection"); 1091 exit(1); 1092 } 1093 amt -= j; 1094 cp += j; 1095 } while (amt > 0); 1096 1097 if (count == bp->cnt) { 1098 /* Keep reading so we stay sync'd up. */ 1099 if (wrerr == NO) { 1100 if (atomicio(vwrite, ofd, bp->buf, 1101 count) != count) { 1102 wrerr = YES; 1103 wrerrno = errno; 1104 } 1105 } 1106 count = 0; 1107 cp = bp->buf; 1108 } 1109 } 1110 unset_nonblock(remin); 1111 if (showprogress) 1112 stop_progress_meter(); 1113 if (count != 0 && wrerr == NO && 1114 atomicio(vwrite, ofd, bp->buf, count) != count) { 1115 wrerr = YES; 1116 wrerrno = errno; 1117 } 1118 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1119 ftruncate(ofd, size) != 0) { 1120 run_err("%s: truncate: %s", np, strerror(errno)); 1121 wrerr = DISPLAYED; 1122 } 1123 if (pflag) { 1124 if (exists || omode != mode) 1125 if (fchmod(ofd, omode)) { 1126 run_err("%s: set mode: %s", 1127 np, strerror(errno)); 1128 wrerr = DISPLAYED; 1129 } 1130 } else { 1131 if (!exists && omode != mode) 1132 if (fchmod(ofd, omode & ~mask)) { 1133 run_err("%s: set mode: %s", 1134 np, strerror(errno)); 1135 wrerr = DISPLAYED; 1136 } 1137 } 1138 if (close(ofd) == -1) { 1139 wrerr = YES; 1140 wrerrno = errno; 1141 } 1142 (void) response(); 1143 if (setimes && wrerr == NO) { 1144 setimes = 0; 1145 if (utimes(np, tv) < 0) { 1146 run_err("%s: set times: %s", 1147 np, strerror(errno)); 1148 wrerr = DISPLAYED; 1149 } 1150 } 1151 switch (wrerr) { 1152 case YES: 1153 run_err("%s: %s", np, strerror(wrerrno)); 1154 break; 1155 case NO: 1156 (void) atomicio(vwrite, remout, empty, 1); 1157 break; 1158 case DISPLAYED: 1159 break; 1160 } 1161 } 1162 screwup: 1163 run_err("protocol error: %s", why); 1164 exit(1); 1165 } 1166 1167 int 1168 response(void) 1169 { 1170 char ch, *cp, resp, rbuf[2048]; 1171 1172 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1173 lostconn(0); 1174 1175 cp = rbuf; 1176 switch (resp) { 1177 case 0: /* ok */ 1178 return (0); 1179 default: 1180 *cp++ = resp; 1181 /* FALLTHROUGH */ 1182 case 1: /* error, followed by error msg */ 1183 case 2: /* fatal error, "" */ 1184 do { 1185 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1186 lostconn(0); 1187 *cp++ = ch; 1188 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1189 1190 if (!iamremote) 1191 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1192 ++errs; 1193 if (resp == 1) 1194 return (-1); 1195 exit(1); 1196 } 1197 /* NOTREACHED */ 1198 } 1199 1200 void 1201 usage(void) 1202 { 1203 (void) fprintf(stderr, 1204 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1205 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1206 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1207 exit(1); 1208 } 1209 1210 void 1211 run_err(const char *fmt,...) 1212 { 1213 static FILE *fp; 1214 va_list ap; 1215 1216 ++errs; 1217 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1218 (void) fprintf(fp, "%c", 0x01); 1219 (void) fprintf(fp, "scp: "); 1220 va_start(ap, fmt); 1221 (void) vfprintf(fp, fmt, ap); 1222 va_end(ap); 1223 (void) fprintf(fp, "\n"); 1224 (void) fflush(fp); 1225 } 1226 1227 if (!iamremote) { 1228 va_start(ap, fmt); 1229 vfprintf(stderr, fmt, ap); 1230 va_end(ap); 1231 fprintf(stderr, "\n"); 1232 } 1233 } 1234 1235 void 1236 verifydir(char *cp) 1237 { 1238 struct stat stb; 1239 1240 if (!stat(cp, &stb)) { 1241 if (S_ISDIR(stb.st_mode)) 1242 return; 1243 errno = ENOTDIR; 1244 } 1245 run_err("%s: %s", cp, strerror(errno)); 1246 killchild(0); 1247 } 1248 1249 int 1250 okname(char *cp0) 1251 { 1252 int c; 1253 char *cp; 1254 1255 cp = cp0; 1256 do { 1257 c = (int)*cp; 1258 if (c & 0200) 1259 goto bad; 1260 if (!isalpha(c) && !isdigit(c)) { 1261 switch (c) { 1262 case '\'': 1263 case '"': 1264 case '`': 1265 case ' ': 1266 case '#': 1267 goto bad; 1268 default: 1269 break; 1270 } 1271 } 1272 } while (*++cp); 1273 return (1); 1274 1275 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1276 return (0); 1277 } 1278 1279 BUF * 1280 allocbuf(BUF *bp, int fd, int blksize) 1281 { 1282 size_t size; 1283 struct stat stb; 1284 1285 if (fstat(fd, &stb) < 0) { 1286 run_err("fstat: %s", strerror(errno)); 1287 return (0); 1288 } 1289 size = roundup(stb.st_blksize, blksize); 1290 if (size == 0) 1291 size = blksize; 1292 if (bp->cnt >= size) 1293 return (bp); 1294 if (bp->buf == NULL) 1295 bp->buf = xmalloc(size); 1296 else 1297 bp->buf = xrealloc(bp->buf, 1, size); 1298 memset(bp->buf, 0, size); 1299 bp->cnt = size; 1300 return (bp); 1301 } 1302 1303 static void 1304 lostconn(int signo) 1305 { 1306 if (!iamremote) 1307 write(STDERR_FILENO, "lost connection\n", 16); 1308 if (signo) 1309 _exit(1); 1310 else 1311 exit(1); 1312 } 1313