1 /* $NetBSD: scp.c,v 1.11 2015/04/03 23:58:19 christos Exp $ */ 2 /* $OpenBSD: scp.c,v 1.181 2015/01/16 06:40:12 deraadt 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 1.11 2015/04/03 23:58:19 christos Exp $"); 77 #include <sys/param.h> /* roundup MAX */ 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 <limits.h> 98 #include <vis.h> 99 100 #include "xmalloc.h" 101 #include "atomicio.h" 102 #include "pathnames.h" 103 #include "log.h" 104 #include "misc.h" 105 #include "progressmeter.h" 106 107 #define COPY_BUFLEN 16384 108 109 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 110 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 111 112 static char dot[] = "."; 113 static char empty[] = ""; 114 115 /* Struct for addargs */ 116 arglist args; 117 arglist remote_remote_args; 118 119 /* Bandwidth limit */ 120 long long limit_kbps = 0; 121 struct bwlimit bwlimit; 122 123 /* Name of current file being transferred. */ 124 char *curfile; 125 126 /* This is set to non-zero to enable verbose mode. */ 127 int verbose_mode = 0; 128 129 /* This is set to zero if the progressmeter is not desired. */ 130 int showprogress = 1; 131 132 /* 133 * This is set to non-zero if remote-remote copy should be piped 134 * through this process. 135 */ 136 int throughlocal = 0; 137 138 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 139 #ifdef RESCUEDIR 140 const char *ssh_program = RESCUEDIR "/ssh"; 141 #else 142 const char *ssh_program = _PATH_SSH_PROGRAM; 143 #endif 144 145 /* This is used to store the pid of ssh_program */ 146 pid_t do_cmd_pid = -1; 147 148 __dead static void 149 killchild(int signo) 150 { 151 if (do_cmd_pid > 1) { 152 kill(do_cmd_pid, signo ? signo : SIGTERM); 153 waitpid(do_cmd_pid, NULL, 0); 154 } 155 156 if (signo) 157 _exit(1); 158 exit(1); 159 } 160 161 static void 162 suspchild(int signo) 163 { 164 int status; 165 166 if (do_cmd_pid > 1) { 167 kill(do_cmd_pid, signo); 168 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 169 errno == EINTR) 170 ; 171 kill(getpid(), SIGSTOP); 172 } 173 } 174 175 static int 176 do_local_cmd(arglist *a) 177 { 178 u_int i; 179 int status; 180 pid_t pid; 181 182 if (a->num == 0) 183 fatal("do_local_cmd: no arguments"); 184 185 if (verbose_mode) { 186 fprintf(stderr, "Executing:"); 187 for (i = 0; i < a->num; i++) 188 fprintf(stderr, " %s", a->list[i]); 189 fprintf(stderr, "\n"); 190 } 191 if ((pid = fork()) == -1) 192 fatal("do_local_cmd: fork: %s", strerror(errno)); 193 194 if (pid == 0) { 195 execvp(a->list[0], a->list); 196 perror(a->list[0]); 197 exit(1); 198 } 199 200 do_cmd_pid = pid; 201 signal(SIGTERM, killchild); 202 signal(SIGINT, killchild); 203 signal(SIGHUP, killchild); 204 205 while (waitpid(pid, &status, 0) == -1) 206 if (errno != EINTR) 207 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 208 209 do_cmd_pid = -1; 210 211 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 212 return (-1); 213 214 return (0); 215 } 216 217 /* 218 * This function executes the given command as the specified user on the 219 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 220 * assigns the input and output file descriptors on success. 221 */ 222 223 int 224 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 225 { 226 int pin[2], pout[2], reserved[2]; 227 228 if (verbose_mode) 229 fprintf(stderr, 230 "Executing: program %s host %s, user %s, command %s\n", 231 ssh_program, host, 232 remuser ? remuser : "(unspecified)", cmd); 233 234 /* 235 * Reserve two descriptors so that the real pipes won't get 236 * descriptors 0 and 1 because that will screw up dup2 below. 237 */ 238 if (pipe(reserved) < 0) 239 fatal("pipe: %s", strerror(errno)); 240 241 /* Create a socket pair for communicating with ssh. */ 242 if (pipe(pin) < 0) 243 fatal("pipe: %s", strerror(errno)); 244 if (pipe(pout) < 0) 245 fatal("pipe: %s", strerror(errno)); 246 247 /* Free the reserved descriptors. */ 248 close(reserved[0]); 249 close(reserved[1]); 250 251 signal(SIGTSTP, suspchild); 252 signal(SIGTTIN, suspchild); 253 signal(SIGTTOU, suspchild); 254 255 /* Fork a child to execute the command on the remote host using ssh. */ 256 do_cmd_pid = fork(); 257 if (do_cmd_pid == 0) { 258 /* Child. */ 259 close(pin[1]); 260 close(pout[0]); 261 dup2(pin[0], 0); 262 dup2(pout[1], 1); 263 close(pin[0]); 264 close(pout[1]); 265 266 replacearg(&args, 0, "%s", ssh_program); 267 if (remuser != NULL) { 268 addargs(&args, "-l"); 269 addargs(&args, "%s", remuser); 270 } 271 addargs(&args, "--"); 272 addargs(&args, "%s", host); 273 addargs(&args, "%s", cmd); 274 275 execvp(ssh_program, args.list); 276 perror(ssh_program); 277 exit(1); 278 } else if (do_cmd_pid == -1) { 279 fatal("fork: %s", strerror(errno)); 280 } 281 /* Parent. Close the other side, and return the local side. */ 282 close(pin[0]); 283 *fdout = pin[1]; 284 close(pout[1]); 285 *fdin = pout[0]; 286 signal(SIGTERM, killchild); 287 signal(SIGINT, killchild); 288 signal(SIGHUP, killchild); 289 return 0; 290 } 291 292 /* 293 * This functions executes a command simlar to do_cmd(), but expects the 294 * input and output descriptors to be setup by a previous call to do_cmd(). 295 * This way the input and output of two commands can be connected. 296 */ 297 int 298 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 299 { 300 pid_t pid; 301 int status; 302 303 if (verbose_mode) 304 fprintf(stderr, 305 "Executing: 2nd program %s host %s, user %s, command %s\n", 306 ssh_program, host, 307 remuser ? remuser : "(unspecified)", cmd); 308 309 /* Fork a child to execute the command on the remote host using ssh. */ 310 pid = fork(); 311 if (pid == 0) { 312 dup2(fdin, 0); 313 dup2(fdout, 1); 314 315 replacearg(&args, 0, "%s", ssh_program); 316 if (remuser != NULL) { 317 addargs(&args, "-l"); 318 addargs(&args, "%s", remuser); 319 } 320 addargs(&args, "--"); 321 addargs(&args, "%s", host); 322 addargs(&args, "%s", cmd); 323 324 execvp(ssh_program, args.list); 325 perror(ssh_program); 326 exit(1); 327 } else if (pid == -1) { 328 fatal("fork: %s", strerror(errno)); 329 } 330 while (waitpid(pid, &status, 0) == -1) 331 if (errno != EINTR) 332 fatal("do_cmd2: waitpid: %s", strerror(errno)); 333 return 0; 334 } 335 336 typedef struct { 337 size_t cnt; 338 char *buf; 339 } BUF; 340 341 BUF *allocbuf(BUF *, int, int); 342 __dead static void lostconn(int); 343 int okname(char *); 344 void run_err(const char *,...) __printflike(1, 2); 345 void verifydir(char *); 346 347 struct passwd *pwd; 348 uid_t userid; 349 int errs, remin, remout; 350 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 351 352 #define CMDNEEDS 64 353 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 354 355 int response(void); 356 void rsource(char *, struct stat *); 357 void sink(int, char *[]); 358 void source(int, char *[]); 359 static void tolocal(int, char *[]); 360 static void toremote(char *, int, char *[]); 361 __dead static void usage(void); 362 363 int 364 main(int argc, char **argv) 365 { 366 int ch, fflag, tflag, status, n; 367 char *targ, **newargv; 368 const char *errstr; 369 extern char *optarg; 370 extern int optind; 371 372 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 373 sanitise_stdfd(); 374 375 /* Copy argv, because we modify it */ 376 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 377 for (n = 0; n < argc; n++) 378 newargv[n] = xstrdup(argv[n]); 379 argv = newargv; 380 381 memset(&args, '\0', sizeof(args)); 382 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 383 args.list = remote_remote_args.list = NULL; 384 addargs(&args, "%s", ssh_program); 385 addargs(&args, "-x"); 386 addargs(&args, "-oForwardAgent=no"); 387 addargs(&args, "-oPermitLocalCommand=no"); 388 addargs(&args, "-oClearAllForwardings=yes"); 389 390 fflag = tflag = 0; 391 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 392 switch (ch) { 393 /* User-visible flags. */ 394 case '1': 395 case '2': 396 case '4': 397 case '6': 398 case 'C': 399 addargs(&args, "-%c", ch); 400 addargs(&remote_remote_args, "-%c", ch); 401 break; 402 case '3': 403 throughlocal = 1; 404 break; 405 case 'o': 406 case 'c': 407 case 'i': 408 case 'F': 409 addargs(&remote_remote_args, "-%c", ch); 410 addargs(&remote_remote_args, "%s", optarg); 411 addargs(&args, "-%c", ch); 412 addargs(&args, "%s", optarg); 413 break; 414 case 'P': 415 addargs(&remote_remote_args, "-p"); 416 addargs(&remote_remote_args, "%s", optarg); 417 addargs(&args, "-p"); 418 addargs(&args, "%s", optarg); 419 break; 420 case 'B': 421 addargs(&remote_remote_args, "-oBatchmode=yes"); 422 addargs(&args, "-oBatchmode=yes"); 423 break; 424 case 'l': 425 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 426 &errstr); 427 if (errstr != NULL) 428 usage(); 429 limit_kbps *= 1024; /* kbps */ 430 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 431 break; 432 case 'p': 433 pflag = 1; 434 break; 435 case 'r': 436 iamrecursive = 1; 437 break; 438 case 'S': 439 ssh_program = xstrdup(optarg); 440 break; 441 case 'v': 442 addargs(&args, "-v"); 443 addargs(&remote_remote_args, "-v"); 444 verbose_mode = 1; 445 break; 446 case 'q': 447 addargs(&args, "-q"); 448 addargs(&remote_remote_args, "-q"); 449 showprogress = 0; 450 break; 451 452 /* Server options. */ 453 case 'd': 454 targetshouldbedirectory = 1; 455 break; 456 case 'f': /* "from" */ 457 iamremote = 1; 458 fflag = 1; 459 break; 460 case 't': /* "to" */ 461 iamremote = 1; 462 tflag = 1; 463 break; 464 default: 465 usage(); 466 } 467 argc -= optind; 468 argv += optind; 469 470 if ((pwd = getpwuid(userid = getuid())) == NULL) 471 fatal("unknown user %u", (u_int) userid); 472 473 if (!isatty(STDOUT_FILENO)) 474 showprogress = 0; 475 476 remin = STDIN_FILENO; 477 remout = STDOUT_FILENO; 478 479 if (fflag) { 480 /* Follow "protocol", send data. */ 481 (void) response(); 482 source(argc, argv); 483 exit(errs != 0); 484 } 485 if (tflag) { 486 /* Receive data. */ 487 sink(argc, argv); 488 exit(errs != 0); 489 } 490 if (argc < 2) 491 usage(); 492 if (argc > 2) 493 targetshouldbedirectory = 1; 494 495 remin = remout = -1; 496 do_cmd_pid = -1; 497 /* Command to be executed on remote system using "ssh". */ 498 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 499 verbose_mode ? " -v" : "", 500 iamrecursive ? " -r" : "", pflag ? " -p" : "", 501 targetshouldbedirectory ? " -d" : ""); 502 503 (void) signal(SIGPIPE, lostconn); 504 505 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 506 toremote(targ, argc, argv); 507 else { 508 if (targetshouldbedirectory) 509 verifydir(argv[argc - 1]); 510 tolocal(argc, argv); /* Dest is local host. */ 511 } 512 /* 513 * Finally check the exit status of the ssh process, if one was forked 514 * and no error has occurred yet 515 */ 516 if (do_cmd_pid != -1 && errs == 0) { 517 if (remin != -1) 518 (void) close(remin); 519 if (remout != -1) 520 (void) close(remout); 521 if (waitpid(do_cmd_pid, &status, 0) == -1) 522 errs = 1; 523 else { 524 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 525 errs = 1; 526 } 527 } 528 exit(errs != 0); 529 } 530 531 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 532 static int 533 scpio(void *_cnt, size_t s) 534 { 535 off_t *cnt = (off_t *)_cnt; 536 537 *cnt += s; 538 if (limit_kbps > 0) 539 bandwidth_limit(&bwlimit, s); 540 return 0; 541 } 542 543 static int 544 do_times(int fd, int verb, const struct stat *sb) 545 { 546 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 547 char buf[(20 + 7 + 2) * 2 + 2]; 548 549 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 550 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 551 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 552 if (verb) { 553 fprintf(stderr, "File mtime %lld atime %lld\n", 554 (long long)sb->st_mtime, (long long)sb->st_atime); 555 fprintf(stderr, "Sending file timestamps: %s", buf); 556 } 557 (void) atomicio(vwrite, fd, buf, strlen(buf)); 558 return (response()); 559 } 560 561 void 562 toremote(char *targ, int argc, char **argv) 563 { 564 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 565 arglist alist; 566 int i; 567 u_int j; 568 569 memset(&alist, '\0', sizeof(alist)); 570 alist.list = NULL; 571 572 *targ++ = 0; 573 if (*targ == 0) 574 targ = dot; 575 576 arg = xstrdup(argv[argc - 1]); 577 if ((thost = strrchr(arg, '@'))) { 578 /* user@host */ 579 *thost++ = 0; 580 tuser = arg; 581 if (*tuser == '\0') 582 tuser = NULL; 583 } else { 584 thost = arg; 585 tuser = NULL; 586 } 587 588 if (tuser != NULL && !okname(tuser)) { 589 free(arg); 590 return; 591 } 592 593 for (i = 0; i < argc - 1; i++) { 594 src = colon(argv[i]); 595 if (src && throughlocal) { /* extended remote to remote */ 596 *src++ = 0; 597 if (*src == 0) 598 src = dot; 599 host = strrchr(argv[i], '@'); 600 if (host) { 601 *host++ = 0; 602 host = cleanhostname(host); 603 suser = argv[i]; 604 if (*suser == '\0') 605 suser = pwd->pw_name; 606 else if (!okname(suser)) 607 continue; 608 } else { 609 host = cleanhostname(argv[i]); 610 suser = NULL; 611 } 612 xasprintf(&bp, "%s -f %s%s", cmd, 613 *src == '-' ? "-- " : "", src); 614 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 615 exit(1); 616 free(bp); 617 host = cleanhostname(thost); 618 xasprintf(&bp, "%s -t %s%s", cmd, 619 *targ == '-' ? "-- " : "", targ); 620 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 621 exit(1); 622 free(bp); 623 (void) close(remin); 624 (void) close(remout); 625 remin = remout = -1; 626 } else if (src) { /* standard remote to remote */ 627 freeargs(&alist); 628 addargs(&alist, "%s", ssh_program); 629 addargs(&alist, "-x"); 630 addargs(&alist, "-oClearAllForwardings=yes"); 631 addargs(&alist, "-n"); 632 for (j = 0; j < remote_remote_args.num; j++) { 633 addargs(&alist, "%s", 634 remote_remote_args.list[j]); 635 } 636 *src++ = 0; 637 if (*src == 0) 638 src = dot; 639 host = strrchr(argv[i], '@'); 640 641 if (host) { 642 *host++ = 0; 643 host = cleanhostname(host); 644 suser = argv[i]; 645 if (*suser == '\0') 646 suser = pwd->pw_name; 647 else if (!okname(suser)) 648 continue; 649 addargs(&alist, "-l"); 650 addargs(&alist, "%s", suser); 651 } else { 652 host = cleanhostname(argv[i]); 653 } 654 addargs(&alist, "--"); 655 addargs(&alist, "%s", host); 656 addargs(&alist, "%s", cmd); 657 addargs(&alist, "%s", src); 658 addargs(&alist, "%s%s%s:%s", 659 tuser ? tuser : "", tuser ? "@" : "", 660 thost, targ); 661 if (do_local_cmd(&alist) != 0) 662 errs = 1; 663 } else { /* local to remote */ 664 if (remin == -1) { 665 xasprintf(&bp, "%s -t %s%s", cmd, 666 *targ == '-' ? "-- " : "", targ); 667 host = cleanhostname(thost); 668 if (do_cmd(host, tuser, bp, &remin, 669 &remout) < 0) 670 exit(1); 671 if (response() < 0) 672 exit(1); 673 free(bp); 674 } 675 source(1, argv + i); 676 } 677 } 678 free(arg); 679 } 680 681 static void 682 tolocal(int argc, char **argv) 683 { 684 char *bp, *host, *src, *suser; 685 arglist alist; 686 int i; 687 688 memset(&alist, '\0', sizeof(alist)); 689 alist.list = NULL; 690 691 for (i = 0; i < argc - 1; i++) { 692 if (!(src = colon(argv[i]))) { /* Local to local. */ 693 freeargs(&alist); 694 addargs(&alist, "%s", _PATH_CP); 695 if (iamrecursive) 696 addargs(&alist, "-r"); 697 if (pflag) 698 addargs(&alist, "-p"); 699 addargs(&alist, "--"); 700 addargs(&alist, "%s", argv[i]); 701 addargs(&alist, "%s", argv[argc-1]); 702 if (do_local_cmd(&alist)) 703 ++errs; 704 continue; 705 } 706 *src++ = 0; 707 if (*src == 0) 708 src = dot; 709 if ((host = strrchr(argv[i], '@')) == NULL) { 710 host = argv[i]; 711 suser = NULL; 712 } else { 713 *host++ = 0; 714 suser = argv[i]; 715 if (*suser == '\0') 716 suser = pwd->pw_name; 717 } 718 host = cleanhostname(host); 719 xasprintf(&bp, "%s -f %s%s", 720 cmd, *src == '-' ? "-- " : "", src); 721 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 722 free(bp); 723 ++errs; 724 continue; 725 } 726 free(bp); 727 sink(1, argv + argc - 1); 728 (void) close(remin); 729 remin = remout = -1; 730 } 731 } 732 733 void 734 source(int argc, char **argv) 735 { 736 struct stat stb; 737 static BUF buffer; 738 BUF *bp; 739 off_t i, statbytes; 740 size_t amt, nr; 741 int fd = -1, haderr, indx; 742 char *last, *name, buf[16384], encname[PATH_MAX]; 743 int len; 744 745 for (indx = 0; indx < argc; ++indx) { 746 fd = -1; 747 name = argv[indx]; 748 statbytes = 0; 749 len = strlen(name); 750 while (len > 1 && name[len-1] == '/') 751 name[--len] = '\0'; 752 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 753 goto syserr; 754 if (strchr(name, '\n') != NULL) { 755 strvisx(encname, name, len, VIS_NL); 756 name = encname; 757 } 758 if (fstat(fd, &stb) < 0) { 759 syserr: run_err("%s: %s", name, strerror(errno)); 760 goto next; 761 } 762 if (stb.st_size < 0) { 763 run_err("%s: %s", name, "Negative file size"); 764 goto next; 765 } 766 unset_nonblock(fd); 767 switch (stb.st_mode & S_IFMT) { 768 case S_IFREG: 769 break; 770 case S_IFDIR: 771 if (iamrecursive) { 772 rsource(name, &stb); 773 goto next; 774 } 775 /* FALLTHROUGH */ 776 default: 777 run_err("%s: not a regular file", name); 778 goto next; 779 } 780 if ((last = strrchr(name, '/')) == NULL) 781 last = name; 782 else 783 ++last; 784 curfile = last; 785 if (pflag) { 786 if (do_times(remout, verbose_mode, &stb) < 0) 787 goto next; 788 } 789 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 790 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 791 (u_int) (stb.st_mode & FILEMODEMASK), 792 (long long)stb.st_size, last); 793 if (verbose_mode) { 794 fprintf(stderr, "Sending file modes: %s", buf); 795 } 796 (void) atomicio(vwrite, remout, buf, strlen(buf)); 797 if (response() < 0) 798 goto next; 799 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 800 next: if (fd != -1) { 801 (void) close(fd); 802 fd = -1; 803 } 804 continue; 805 } 806 if (showprogress) 807 start_progress_meter(curfile, stb.st_size, &statbytes); 808 set_nonblock(remout); 809 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 810 amt = bp->cnt; 811 if (i + (off_t)amt > stb.st_size) 812 amt = stb.st_size - i; 813 if (!haderr) { 814 if ((nr = atomicio(read, fd, 815 bp->buf, amt)) != amt) { 816 haderr = errno; 817 memset(bp->buf + nr, 0, amt - nr); 818 } 819 } 820 /* Keep writing after error to retain sync */ 821 if (haderr) { 822 (void)atomicio(vwrite, remout, bp->buf, amt); 823 memset(bp->buf, 0, amt); 824 continue; 825 } 826 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 827 &statbytes) != amt) 828 haderr = errno; 829 } 830 unset_nonblock(remout); 831 if (showprogress) 832 stop_progress_meter(); 833 834 if (fd != -1) { 835 if (close(fd) < 0 && !haderr) 836 haderr = errno; 837 fd = -1; 838 } 839 if (!haderr) 840 (void) atomicio(vwrite, remout, empty, 1); 841 else 842 run_err("%s: %s", name, strerror(haderr)); 843 (void) response(); 844 } 845 } 846 847 void 848 rsource(char *name, struct stat *statp) 849 { 850 DIR *dirp; 851 struct dirent *dp; 852 char *last, *vect[1], path[PATH_MAX]; 853 854 if (!(dirp = opendir(name))) { 855 run_err("%s: %s", name, strerror(errno)); 856 return; 857 } 858 last = strrchr(name, '/'); 859 if (last == 0) 860 last = name; 861 else 862 last++; 863 if (pflag) { 864 if (do_times(remout, verbose_mode, statp) < 0) { 865 closedir(dirp); 866 return; 867 } 868 } 869 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 870 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 871 if (verbose_mode) 872 fprintf(stderr, "Entering directory: %s", path); 873 (void) atomicio(vwrite, remout, path, strlen(path)); 874 if (response() < 0) { 875 closedir(dirp); 876 return; 877 } 878 while ((dp = readdir(dirp)) != NULL) { 879 if (dp->d_ino == 0) 880 continue; 881 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 882 continue; 883 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 884 run_err("%s/%s: name too long", name, dp->d_name); 885 continue; 886 } 887 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 888 vect[0] = path; 889 source(1, vect); 890 } 891 (void) closedir(dirp); 892 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 893 (void) response(); 894 } 895 896 void 897 sink(int argc, char **argv) 898 { 899 static BUF buffer; 900 struct stat stb; 901 enum { 902 YES, NO, DISPLAYED 903 } wrerr; 904 BUF *bp; 905 off_t i; 906 size_t j, count; 907 int amt, exists, first, ofd; 908 mode_t mode, omode, mask; 909 off_t size, statbytes; 910 unsigned long long ull; 911 int setimes, targisdir, wrerrno = 0; 912 char ch, *cp, *np, *targ, *vect[1], buf[16384]; 913 const char *why; 914 struct timeval tv[2]; 915 916 #define atime tv[0] 917 #define mtime tv[1] 918 #define SCREWUP(str) { why = str; goto screwup; } 919 920 setimes = targisdir = 0; 921 mask = umask(0); 922 if (!pflag) 923 (void) umask(mask); 924 if (argc != 1) { 925 run_err("ambiguous target"); 926 exit(1); 927 } 928 targ = *argv; 929 if (targetshouldbedirectory) 930 verifydir(targ); 931 932 (void) atomicio(vwrite, remout, empty, 1); 933 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 934 targisdir = 1; 935 for (first = 1;; first = 0) { 936 cp = buf; 937 if (atomicio(read, remin, cp, 1) != 1) 938 return; 939 if (*cp++ == '\n') 940 SCREWUP("unexpected <newline>"); 941 do { 942 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 943 SCREWUP("lost connection"); 944 *cp++ = ch; 945 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 946 *cp = 0; 947 if (verbose_mode) 948 fprintf(stderr, "Sink: %s", buf); 949 950 if (buf[0] == '\01' || buf[0] == '\02') { 951 if (iamremote == 0) 952 (void) atomicio(vwrite, STDERR_FILENO, 953 buf + 1, strlen(buf + 1)); 954 if (buf[0] == '\02') 955 exit(1); 956 ++errs; 957 continue; 958 } 959 if (buf[0] == 'E') { 960 (void) atomicio(vwrite, remout, empty, 1); 961 return; 962 } 963 if (ch == '\n') 964 *--cp = 0; 965 966 cp = buf; 967 if (*cp == 'T') { 968 setimes++; 969 cp++; 970 if (!isdigit((unsigned char)*cp)) 971 SCREWUP("mtime.sec not present"); 972 ull = strtoull(cp, &cp, 10); 973 if (!cp || *cp++ != ' ') 974 SCREWUP("mtime.sec not delimited"); 975 if ((time_t)ull < 0 || 976 (unsigned long long)(time_t)ull != ull) 977 setimes = 0; /* out of range */ 978 mtime.tv_sec = ull; 979 mtime.tv_usec = strtol(cp, &cp, 10); 980 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 981 mtime.tv_usec > 999999) 982 SCREWUP("mtime.usec not delimited"); 983 if (!isdigit((unsigned char)*cp)) 984 SCREWUP("atime.sec not present"); 985 ull = strtoull(cp, &cp, 10); 986 if (!cp || *cp++ != ' ') 987 SCREWUP("atime.sec not delimited"); 988 if ((time_t)ull < 0 || 989 (unsigned long long)(time_t)ull != ull) 990 setimes = 0; /* out of range */ 991 atime.tv_sec = ull; 992 atime.tv_usec = strtol(cp, &cp, 10); 993 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 994 atime.tv_usec > 999999) 995 SCREWUP("atime.usec not delimited"); 996 (void) atomicio(vwrite, remout, empty, 1); 997 continue; 998 } 999 if (*cp != 'C' && *cp != 'D') { 1000 /* 1001 * Check for the case "rcp remote:foo\* local:bar". 1002 * In this case, the line "No match." can be returned 1003 * by the shell before the rcp command on the remote is 1004 * executed so the ^Aerror_message convention isn't 1005 * followed. 1006 */ 1007 if (first) { 1008 run_err("%s", cp); 1009 exit(1); 1010 } 1011 SCREWUP("expected control record"); 1012 } 1013 mode = 0; 1014 for (++cp; cp < buf + 5; cp++) { 1015 if (*cp < '0' || *cp > '7') 1016 SCREWUP("bad mode"); 1017 mode = (mode << 3) | (*cp - '0'); 1018 } 1019 if (*cp++ != ' ') 1020 SCREWUP("mode not delimited"); 1021 1022 for (size = 0; isdigit((unsigned char)*cp);) 1023 size = size * 10 + (*cp++ - '0'); 1024 if (*cp++ != ' ') 1025 SCREWUP("size not delimited"); 1026 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1027 run_err("error: unexpected filename: %s", cp); 1028 exit(1); 1029 } 1030 if (targisdir) { 1031 static char *namebuf; 1032 static size_t cursize; 1033 size_t need; 1034 1035 need = strlen(targ) + strlen(cp) + 250; 1036 if (need > cursize) { 1037 free(namebuf); 1038 namebuf = xmalloc(need); 1039 cursize = need; 1040 } 1041 (void) snprintf(namebuf, need, "%s%s%s", targ, 1042 strcmp(targ, "/") ? "/" : "", cp); 1043 np = namebuf; 1044 } else 1045 np = targ; 1046 curfile = cp; 1047 exists = stat(np, &stb) == 0; 1048 if (buf[0] == 'D') { 1049 int mod_flag = pflag; 1050 if (!iamrecursive) 1051 SCREWUP("received directory without -r"); 1052 if (exists) { 1053 if (!S_ISDIR(stb.st_mode)) { 1054 errno = ENOTDIR; 1055 goto bad; 1056 } 1057 if (pflag) 1058 (void) chmod(np, mode); 1059 } else { 1060 /* Handle copying from a read-only 1061 directory */ 1062 mod_flag = 1; 1063 if (mkdir(np, mode | S_IRWXU) < 0) 1064 goto bad; 1065 } 1066 vect[0] = xstrdup(np); 1067 sink(1, vect); 1068 if (setimes) { 1069 setimes = 0; 1070 if (utimes(vect[0], tv) < 0) 1071 run_err("%s: set times: %s", 1072 vect[0], strerror(errno)); 1073 } 1074 if (mod_flag) 1075 (void) chmod(vect[0], mode); 1076 free(vect[0]); 1077 continue; 1078 } 1079 omode = mode; 1080 mode |= S_IWUSR; 1081 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1082 bad: run_err("%s: %s", np, strerror(errno)); 1083 continue; 1084 } 1085 (void) atomicio(vwrite, remout, empty, 1); 1086 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1087 (void) close(ofd); 1088 continue; 1089 } 1090 cp = bp->buf; 1091 wrerr = NO; 1092 1093 statbytes = 0; 1094 if (showprogress) 1095 start_progress_meter(curfile, size, &statbytes); 1096 set_nonblock(remin); 1097 for (count = i = 0; i < size; i += bp->cnt) { 1098 amt = bp->cnt; 1099 if (i + amt > size) 1100 amt = size - i; 1101 count += amt; 1102 do { 1103 j = atomicio6(read, remin, cp, amt, 1104 scpio, &statbytes); 1105 if (j == 0) { 1106 run_err("%s", j != EPIPE ? 1107 strerror(errno) : 1108 "dropped connection"); 1109 exit(1); 1110 } 1111 amt -= j; 1112 cp += j; 1113 } while (amt > 0); 1114 1115 if (count == bp->cnt) { 1116 /* Keep reading so we stay sync'd up. */ 1117 if (wrerr == NO) { 1118 if (atomicio(vwrite, ofd, bp->buf, 1119 count) != count) { 1120 wrerr = YES; 1121 wrerrno = errno; 1122 } 1123 } 1124 count = 0; 1125 cp = bp->buf; 1126 } 1127 } 1128 unset_nonblock(remin); 1129 if (showprogress) 1130 stop_progress_meter(); 1131 if (count != 0 && wrerr == NO && 1132 atomicio(vwrite, ofd, bp->buf, count) != count) { 1133 wrerr = YES; 1134 wrerrno = errno; 1135 } 1136 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1137 ftruncate(ofd, size) != 0) { 1138 run_err("%s: truncate: %s", np, strerror(errno)); 1139 wrerr = DISPLAYED; 1140 } 1141 if (pflag) { 1142 if (exists || omode != mode) 1143 if (fchmod(ofd, omode)) { 1144 run_err("%s: set mode: %s", 1145 np, strerror(errno)); 1146 wrerr = DISPLAYED; 1147 } 1148 } else { 1149 if (!exists && omode != mode) 1150 if (fchmod(ofd, omode & ~mask)) { 1151 run_err("%s: set mode: %s", 1152 np, strerror(errno)); 1153 wrerr = DISPLAYED; 1154 } 1155 } 1156 if (close(ofd) == -1) { 1157 wrerr = YES; 1158 wrerrno = errno; 1159 } 1160 (void) response(); 1161 if (setimes && wrerr == NO) { 1162 setimes = 0; 1163 if (utimes(np, tv) < 0) { 1164 run_err("%s: set times: %s", 1165 np, strerror(errno)); 1166 wrerr = DISPLAYED; 1167 } 1168 } 1169 switch (wrerr) { 1170 case YES: 1171 run_err("%s: %s", np, strerror(wrerrno)); 1172 break; 1173 case NO: 1174 (void) atomicio(vwrite, remout, empty, 1); 1175 break; 1176 case DISPLAYED: 1177 break; 1178 } 1179 } 1180 screwup: 1181 run_err("protocol error: %s", why); 1182 exit(1); 1183 } 1184 1185 int 1186 response(void) 1187 { 1188 char ch, *cp, resp, rbuf[2048]; 1189 1190 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1191 lostconn(0); 1192 1193 cp = rbuf; 1194 switch (resp) { 1195 case 0: /* ok */ 1196 return (0); 1197 default: 1198 *cp++ = resp; 1199 /* FALLTHROUGH */ 1200 case 1: /* error, followed by error msg */ 1201 case 2: /* fatal error, "" */ 1202 do { 1203 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1204 lostconn(0); 1205 *cp++ = ch; 1206 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1207 1208 if (!iamremote) 1209 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1210 ++errs; 1211 if (resp == 1) 1212 return (-1); 1213 exit(1); 1214 } 1215 /* NOTREACHED */ 1216 } 1217 1218 void 1219 usage(void) 1220 { 1221 (void) fprintf(stderr, 1222 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1223 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1224 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1225 exit(1); 1226 } 1227 1228 void 1229 run_err(const char *fmt,...) 1230 { 1231 static FILE *fp; 1232 va_list ap; 1233 1234 ++errs; 1235 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1236 (void) fprintf(fp, "%c", 0x01); 1237 (void) fprintf(fp, "scp: "); 1238 va_start(ap, fmt); 1239 (void) vfprintf(fp, fmt, ap); 1240 va_end(ap); 1241 (void) fprintf(fp, "\n"); 1242 (void) fflush(fp); 1243 } 1244 1245 if (!iamremote) { 1246 va_start(ap, fmt); 1247 vfprintf(stderr, fmt, ap); 1248 va_end(ap); 1249 fprintf(stderr, "\n"); 1250 } 1251 } 1252 1253 void 1254 verifydir(char *cp) 1255 { 1256 struct stat stb; 1257 1258 if (!stat(cp, &stb)) { 1259 if (S_ISDIR(stb.st_mode)) 1260 return; 1261 errno = ENOTDIR; 1262 } 1263 run_err("%s: %s", cp, strerror(errno)); 1264 killchild(0); 1265 } 1266 1267 int 1268 okname(char *cp0) 1269 { 1270 int c; 1271 char *cp; 1272 1273 cp = cp0; 1274 do { 1275 c = (int)*cp; 1276 if (c & 0200) 1277 goto bad; 1278 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1279 switch (c) { 1280 case '\'': 1281 case '"': 1282 case '`': 1283 case ' ': 1284 case '#': 1285 goto bad; 1286 default: 1287 break; 1288 } 1289 } 1290 } while (*++cp); 1291 return (1); 1292 1293 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1294 return (0); 1295 } 1296 1297 BUF * 1298 allocbuf(BUF *bp, int fd, int blksize) 1299 { 1300 size_t size; 1301 struct stat stb; 1302 1303 if (fstat(fd, &stb) < 0) { 1304 run_err("fstat: %s", strerror(errno)); 1305 return (0); 1306 } 1307 size = roundup(stb.st_blksize, blksize); 1308 if (size == 0) 1309 size = blksize; 1310 if (bp->cnt >= size) 1311 return (bp); 1312 if (bp->buf == NULL) 1313 bp->buf = xmalloc(size); 1314 else 1315 bp->buf = xrealloc(bp->buf, 1, size); 1316 memset(bp->buf, 0, size); 1317 bp->cnt = size; 1318 return (bp); 1319 } 1320 1321 static void 1322 lostconn(int signo) 1323 { 1324 if (!iamremote) 1325 (void)write(STDERR_FILENO, "lost connection\n", 16); 1326 if (signo) 1327 _exit(1); 1328 else 1329 exit(1); 1330 } 1331