1 /* 2 * scp - secure remote copy. This is basically patched BSD rcp which 3 * uses ssh to do the data transfer (instead of using rcmd). 4 * 5 * NOTE: This version should NOT be suid root. (This uses ssh to 6 * do the transfer and ssh has the necessary privileges.) 7 * 8 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 9 * 10 * As far as I am concerned, the code I have written for this software 11 * can be used freely for any purpose. Any derived versions of this 12 * software must be clearly marked as such, and if the derived work is 13 * incompatible with the protocol description in the RFC file, it must be 14 * called by a name other than "ssh" or "Secure Shell". 15 */ 16 /* 17 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 18 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 1. Redistributions of source code must retain the above copyright 24 * notice, this list of conditions and the following disclaimer. 25 * 2. Redistributions in binary form must reproduce the above copyright 26 * notice, this list of conditions and the following disclaimer in the 27 * documentation and/or other materials provided with the distribution. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 32 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 * Parts from: 43 * 44 * Copyright (c) 1983, 1990, 1992, 1993, 1995 45 * The Regents of the University of California. All rights reserved. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 */ 72 73 #include "includes.h" 74 RCSID("$OpenBSD: scp.c,v 1.113 2003/11/23 23:21:21 djm Exp $"); 75 76 #include "xmalloc.h" 77 #include "atomicio.h" 78 #include "pathnames.h" 79 #include "log.h" 80 #include "misc.h" 81 #include "progressmeter.h" 82 83 #ifdef HAVE___PROGNAME 84 extern char *__progname; 85 #else 86 char *__progname; 87 #endif 88 89 void bwlimit(int); 90 91 /* Struct for addargs */ 92 arglist args; 93 94 /* Bandwidth limit */ 95 off_t limit_rate = 0; 96 97 /* Name of current file being transferred. */ 98 char *curfile; 99 100 /* This is set to non-zero to enable verbose mode. */ 101 int verbose_mode = 0; 102 103 /* This is set to zero if the progressmeter is not desired. */ 104 int showprogress = 1; 105 106 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 107 char *ssh_program = _PATH_SSH_PROGRAM; 108 109 /* This is used to store the pid of ssh_program */ 110 pid_t do_cmd_pid = -1; 111 112 static void 113 killchild(int signo) 114 { 115 if (do_cmd_pid > 1) 116 kill(do_cmd_pid, signo); 117 118 _exit(1); 119 } 120 121 /* 122 * This function executes the given command as the specified user on the 123 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 124 * assigns the input and output file descriptors on success. 125 */ 126 127 int 128 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc) 129 { 130 int pin[2], pout[2], reserved[2]; 131 132 if (verbose_mode) 133 fprintf(stderr, 134 "Executing: program %s host %s, user %s, command %s\n", 135 ssh_program, host, 136 remuser ? remuser : "(unspecified)", cmd); 137 138 /* 139 * Reserve two descriptors so that the real pipes won't get 140 * descriptors 0 and 1 because that will screw up dup2 below. 141 */ 142 pipe(reserved); 143 144 /* Create a socket pair for communicating with ssh. */ 145 if (pipe(pin) < 0) 146 fatal("pipe: %s", strerror(errno)); 147 if (pipe(pout) < 0) 148 fatal("pipe: %s", strerror(errno)); 149 150 /* Free the reserved descriptors. */ 151 close(reserved[0]); 152 close(reserved[1]); 153 154 /* Fork a child to execute the command on the remote host using ssh. */ 155 do_cmd_pid = fork(); 156 if (do_cmd_pid == 0) { 157 /* Child. */ 158 close(pin[1]); 159 close(pout[0]); 160 dup2(pin[0], 0); 161 dup2(pout[1], 1); 162 close(pin[0]); 163 close(pout[1]); 164 165 args.list[0] = ssh_program; 166 if (remuser != NULL) 167 addargs(&args, "-l%s", remuser); 168 addargs(&args, "%s", host); 169 addargs(&args, "%s", cmd); 170 171 execvp(ssh_program, args.list); 172 perror(ssh_program); 173 exit(1); 174 } else if (do_cmd_pid == -1) { 175 fatal("fork: %s", strerror(errno)); 176 } 177 /* Parent. Close the other side, and return the local side. */ 178 close(pin[0]); 179 *fdout = pin[1]; 180 close(pout[1]); 181 *fdin = pout[0]; 182 signal(SIGTERM, killchild); 183 signal(SIGINT, killchild); 184 signal(SIGHUP, killchild); 185 return 0; 186 } 187 188 typedef struct { 189 int cnt; 190 char *buf; 191 } BUF; 192 193 BUF *allocbuf(BUF *, int, int); 194 void lostconn(int); 195 void nospace(void); 196 int okname(char *); 197 void run_err(const char *,...); 198 void verifydir(char *); 199 200 struct passwd *pwd; 201 uid_t userid; 202 int errs, remin, remout; 203 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 204 205 #define CMDNEEDS 64 206 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 207 208 int response(void); 209 void rsource(char *, struct stat *); 210 void sink(int, char *[]); 211 void source(int, char *[]); 212 void tolocal(int, char *[]); 213 void toremote(char *, int, char *[]); 214 void usage(void); 215 216 int 217 main(int argc, char **argv) 218 { 219 int ch, fflag, tflag, status; 220 double speed; 221 char *targ, *endp; 222 extern char *optarg; 223 extern int optind; 224 225 __progname = ssh_get_progname(argv[0]); 226 227 args.list = NULL; 228 addargs(&args, "ssh"); /* overwritten with ssh_program */ 229 addargs(&args, "-x"); 230 addargs(&args, "-oForwardAgent no"); 231 addargs(&args, "-oClearAllForwardings yes"); 232 233 fflag = tflag = 0; 234 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1) 235 switch (ch) { 236 /* User-visible flags. */ 237 case '1': 238 case '2': 239 case '4': 240 case '6': 241 case 'C': 242 addargs(&args, "-%c", ch); 243 break; 244 case 'o': 245 case 'c': 246 case 'i': 247 case 'F': 248 addargs(&args, "-%c%s", ch, optarg); 249 break; 250 case 'P': 251 addargs(&args, "-p%s", optarg); 252 break; 253 case 'B': 254 addargs(&args, "-oBatchmode yes"); 255 break; 256 case 'l': 257 speed = strtod(optarg, &endp); 258 if (speed <= 0 || *endp != '\0') 259 usage(); 260 limit_rate = speed * 1024; 261 break; 262 case 'p': 263 pflag = 1; 264 break; 265 case 'r': 266 iamrecursive = 1; 267 break; 268 case 'S': 269 ssh_program = xstrdup(optarg); 270 break; 271 case 'v': 272 addargs(&args, "-v"); 273 verbose_mode = 1; 274 break; 275 case 'q': 276 addargs(&args, "-q"); 277 showprogress = 0; 278 break; 279 280 /* Server options. */ 281 case 'd': 282 targetshouldbedirectory = 1; 283 break; 284 case 'f': /* "from" */ 285 iamremote = 1; 286 fflag = 1; 287 break; 288 case 't': /* "to" */ 289 iamremote = 1; 290 tflag = 1; 291 #ifdef HAVE_CYGWIN 292 setmode(0, O_BINARY); 293 #endif 294 break; 295 default: 296 usage(); 297 } 298 argc -= optind; 299 argv += optind; 300 301 if ((pwd = getpwuid(userid = getuid())) == NULL) 302 fatal("unknown user %u", (u_int) userid); 303 304 if (!isatty(STDERR_FILENO)) 305 showprogress = 0; 306 307 remin = STDIN_FILENO; 308 remout = STDOUT_FILENO; 309 310 if (fflag) { 311 /* Follow "protocol", send data. */ 312 (void) response(); 313 source(argc, argv); 314 exit(errs != 0); 315 } 316 if (tflag) { 317 /* Receive data. */ 318 sink(argc, argv); 319 exit(errs != 0); 320 } 321 if (argc < 2) 322 usage(); 323 if (argc > 2) 324 targetshouldbedirectory = 1; 325 326 remin = remout = -1; 327 do_cmd_pid = -1; 328 /* Command to be executed on remote system using "ssh". */ 329 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 330 verbose_mode ? " -v" : "", 331 iamrecursive ? " -r" : "", pflag ? " -p" : "", 332 targetshouldbedirectory ? " -d" : ""); 333 334 (void) signal(SIGPIPE, lostconn); 335 336 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 337 toremote(targ, argc, argv); 338 else { 339 tolocal(argc, argv); /* Dest is local host. */ 340 if (targetshouldbedirectory) 341 verifydir(argv[argc - 1]); 342 } 343 /* 344 * Finally check the exit status of the ssh process, if one was forked 345 * and no error has occured yet 346 */ 347 if (do_cmd_pid != -1 && errs == 0) { 348 if (remin != -1) 349 (void) close(remin); 350 if (remout != -1) 351 (void) close(remout); 352 if (waitpid(do_cmd_pid, &status, 0) == -1) 353 errs = 1; 354 else { 355 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 356 errs = 1; 357 } 358 } 359 exit(errs != 0); 360 } 361 362 void 363 toremote(char *targ, int argc, char **argv) 364 { 365 int i, len; 366 char *bp, *host, *src, *suser, *thost, *tuser; 367 368 *targ++ = 0; 369 if (*targ == 0) 370 targ = "."; 371 372 if ((thost = strrchr(argv[argc - 1], '@'))) { 373 /* user@host */ 374 *thost++ = 0; 375 tuser = argv[argc - 1]; 376 if (*tuser == '\0') 377 tuser = NULL; 378 } else { 379 thost = argv[argc - 1]; 380 tuser = NULL; 381 } 382 383 for (i = 0; i < argc - 1; i++) { 384 src = colon(argv[i]); 385 if (src) { /* remote to remote */ 386 static char *ssh_options = 387 "-x -o'ClearAllForwardings yes'"; 388 *src++ = 0; 389 if (*src == 0) 390 src = "."; 391 host = strrchr(argv[i], '@'); 392 len = strlen(ssh_program) + strlen(argv[i]) + 393 strlen(src) + (tuser ? strlen(tuser) : 0) + 394 strlen(thost) + strlen(targ) + 395 strlen(ssh_options) + CMDNEEDS + 20; 396 bp = xmalloc(len); 397 if (host) { 398 *host++ = 0; 399 host = cleanhostname(host); 400 suser = argv[i]; 401 if (*suser == '\0') 402 suser = pwd->pw_name; 403 else if (!okname(suser)) { 404 xfree(bp); 405 continue; 406 } 407 if (tuser && !okname(tuser)) { 408 xfree(bp); 409 continue; 410 } 411 snprintf(bp, len, 412 "%s%s %s -n " 413 "-l %s %s %s %s '%s%s%s:%s'", 414 ssh_program, verbose_mode ? " -v" : "", 415 ssh_options, suser, host, cmd, src, 416 tuser ? tuser : "", tuser ? "@" : "", 417 thost, targ); 418 } else { 419 host = cleanhostname(argv[i]); 420 snprintf(bp, len, 421 "exec %s%s %s -n %s " 422 "%s %s '%s%s%s:%s'", 423 ssh_program, verbose_mode ? " -v" : "", 424 ssh_options, host, cmd, src, 425 tuser ? tuser : "", tuser ? "@" : "", 426 thost, targ); 427 } 428 if (verbose_mode) 429 fprintf(stderr, "Executing: %s\n", bp); 430 if (system(bp) != 0) 431 errs = 1; 432 (void) xfree(bp); 433 } else { /* local to remote */ 434 if (remin == -1) { 435 len = strlen(targ) + CMDNEEDS + 20; 436 bp = xmalloc(len); 437 (void) snprintf(bp, len, "%s -t %s", cmd, targ); 438 host = cleanhostname(thost); 439 if (do_cmd(host, tuser, bp, &remin, 440 &remout, argc) < 0) 441 exit(1); 442 if (response() < 0) 443 exit(1); 444 (void) xfree(bp); 445 } 446 source(1, argv + i); 447 } 448 } 449 } 450 451 void 452 tolocal(int argc, char **argv) 453 { 454 int i, len; 455 char *bp, *host, *src, *suser; 456 457 for (i = 0; i < argc - 1; i++) { 458 if (!(src = colon(argv[i]))) { /* Local to local. */ 459 len = strlen(_PATH_CP) + strlen(argv[i]) + 460 strlen(argv[argc - 1]) + 20; 461 bp = xmalloc(len); 462 (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP, 463 iamrecursive ? " -r" : "", pflag ? " -p" : "", 464 argv[i], argv[argc - 1]); 465 if (verbose_mode) 466 fprintf(stderr, "Executing: %s\n", bp); 467 if (system(bp)) 468 ++errs; 469 (void) xfree(bp); 470 continue; 471 } 472 *src++ = 0; 473 if (*src == 0) 474 src = "."; 475 if ((host = strrchr(argv[i], '@')) == NULL) { 476 host = argv[i]; 477 suser = NULL; 478 } else { 479 *host++ = 0; 480 suser = argv[i]; 481 if (*suser == '\0') 482 suser = pwd->pw_name; 483 } 484 host = cleanhostname(host); 485 len = strlen(src) + CMDNEEDS + 20; 486 bp = xmalloc(len); 487 (void) snprintf(bp, len, "%s -f %s", cmd, src); 488 if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) { 489 (void) xfree(bp); 490 ++errs; 491 continue; 492 } 493 xfree(bp); 494 sink(1, argv + argc - 1); 495 (void) close(remin); 496 remin = remout = -1; 497 } 498 } 499 500 void 501 source(int argc, char **argv) 502 { 503 struct stat stb; 504 static BUF buffer; 505 BUF *bp; 506 off_t i, amt, result, statbytes; 507 int fd, haderr, indx; 508 char *last, *name, buf[2048]; 509 int len; 510 511 for (indx = 0; indx < argc; ++indx) { 512 name = argv[indx]; 513 statbytes = 0; 514 len = strlen(name); 515 while (len > 1 && name[len-1] == '/') 516 name[--len] = '\0'; 517 if (strchr(name, '\n') != NULL) { 518 run_err("%s: skipping, filename contains a newline", 519 name); 520 goto next; 521 } 522 if ((fd = open(name, O_RDONLY, 0)) < 0) 523 goto syserr; 524 if (fstat(fd, &stb) < 0) { 525 syserr: run_err("%s: %s", name, strerror(errno)); 526 goto next; 527 } 528 switch (stb.st_mode & S_IFMT) { 529 case S_IFREG: 530 break; 531 case S_IFDIR: 532 if (iamrecursive) { 533 rsource(name, &stb); 534 goto next; 535 } 536 /* FALLTHROUGH */ 537 default: 538 run_err("%s: not a regular file", name); 539 goto next; 540 } 541 if ((last = strrchr(name, '/')) == NULL) 542 last = name; 543 else 544 ++last; 545 curfile = last; 546 if (pflag) { 547 /* 548 * Make it compatible with possible future 549 * versions expecting microseconds. 550 */ 551 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", 552 (u_long) stb.st_mtime, 553 (u_long) stb.st_atime); 554 (void) atomicio(vwrite, remout, buf, strlen(buf)); 555 if (response() < 0) 556 goto next; 557 } 558 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 559 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 560 (u_int) (stb.st_mode & FILEMODEMASK), 561 (int64_t)stb.st_size, last); 562 if (verbose_mode) { 563 fprintf(stderr, "Sending file modes: %s", buf); 564 } 565 (void) atomicio(vwrite, remout, buf, strlen(buf)); 566 if (response() < 0) 567 goto next; 568 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { 569 next: (void) close(fd); 570 continue; 571 } 572 if (showprogress) 573 start_progress_meter(curfile, stb.st_size, &statbytes); 574 /* Keep writing after an error so that we stay sync'd up. */ 575 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 576 amt = bp->cnt; 577 if (i + amt > stb.st_size) 578 amt = stb.st_size - i; 579 if (!haderr) { 580 result = atomicio(read, fd, bp->buf, amt); 581 if (result != amt) 582 haderr = result >= 0 ? EIO : errno; 583 } 584 if (haderr) 585 (void) atomicio(vwrite, remout, bp->buf, amt); 586 else { 587 result = atomicio(vwrite, remout, bp->buf, amt); 588 if (result != amt) 589 haderr = result >= 0 ? EIO : errno; 590 statbytes += result; 591 } 592 if (limit_rate) 593 bwlimit(amt); 594 } 595 if (showprogress) 596 stop_progress_meter(); 597 598 if (close(fd) < 0 && !haderr) 599 haderr = errno; 600 if (!haderr) 601 (void) atomicio(vwrite, remout, "", 1); 602 else 603 run_err("%s: %s", name, strerror(haderr)); 604 (void) response(); 605 } 606 } 607 608 void 609 rsource(char *name, struct stat *statp) 610 { 611 DIR *dirp; 612 struct dirent *dp; 613 char *last, *vect[1], path[1100]; 614 615 if (!(dirp = opendir(name))) { 616 run_err("%s: %s", name, strerror(errno)); 617 return; 618 } 619 last = strrchr(name, '/'); 620 if (last == 0) 621 last = name; 622 else 623 last++; 624 if (pflag) { 625 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", 626 (u_long) statp->st_mtime, 627 (u_long) statp->st_atime); 628 (void) atomicio(vwrite, remout, path, strlen(path)); 629 if (response() < 0) { 630 closedir(dirp); 631 return; 632 } 633 } 634 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 635 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 636 if (verbose_mode) 637 fprintf(stderr, "Entering directory: %s", path); 638 (void) atomicio(vwrite, remout, path, strlen(path)); 639 if (response() < 0) { 640 closedir(dirp); 641 return; 642 } 643 while ((dp = readdir(dirp)) != NULL) { 644 if (dp->d_ino == 0) 645 continue; 646 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 647 continue; 648 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 649 run_err("%s/%s: name too long", name, dp->d_name); 650 continue; 651 } 652 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 653 vect[0] = path; 654 source(1, vect); 655 } 656 (void) closedir(dirp); 657 (void) atomicio(vwrite, remout, "E\n", 2); 658 (void) response(); 659 } 660 661 void 662 bwlimit(int amount) 663 { 664 static struct timeval bwstart, bwend; 665 static int lamt, thresh = 16384; 666 u_int64_t wait; 667 struct timespec ts, rm; 668 669 if (!timerisset(&bwstart)) { 670 gettimeofday(&bwstart, NULL); 671 return; 672 } 673 674 lamt += amount; 675 if (lamt < thresh) 676 return; 677 678 gettimeofday(&bwend, NULL); 679 timersub(&bwend, &bwstart, &bwend); 680 if (!timerisset(&bwend)) 681 return; 682 683 lamt *= 8; 684 wait = (double)1000000L * lamt / limit_rate; 685 686 bwstart.tv_sec = wait / 1000000L; 687 bwstart.tv_usec = wait % 1000000L; 688 689 if (timercmp(&bwstart, &bwend, >)) { 690 timersub(&bwstart, &bwend, &bwend); 691 692 /* Adjust the wait time */ 693 if (bwend.tv_sec) { 694 thresh /= 2; 695 if (thresh < 2048) 696 thresh = 2048; 697 } else if (bwend.tv_usec < 100) { 698 thresh *= 2; 699 if (thresh > 32768) 700 thresh = 32768; 701 } 702 703 TIMEVAL_TO_TIMESPEC(&bwend, &ts); 704 while (nanosleep(&ts, &rm) == -1) { 705 if (errno != EINTR) 706 break; 707 ts = rm; 708 } 709 } 710 711 lamt = 0; 712 gettimeofday(&bwstart, NULL); 713 } 714 715 void 716 sink(int argc, char **argv) 717 { 718 static BUF buffer; 719 struct stat stb; 720 enum { 721 YES, NO, DISPLAYED 722 } wrerr; 723 BUF *bp; 724 off_t i, j; 725 int amt, count, exists, first, mask, mode, ofd, omode; 726 off_t size, statbytes; 727 int setimes, targisdir, wrerrno = 0; 728 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; 729 struct timeval tv[2]; 730 731 #define atime tv[0] 732 #define mtime tv[1] 733 #define SCREWUP(str) do { why = str; goto screwup; } while (0) 734 735 setimes = targisdir = 0; 736 mask = umask(0); 737 if (!pflag) 738 (void) umask(mask); 739 if (argc != 1) { 740 run_err("ambiguous target"); 741 exit(1); 742 } 743 targ = *argv; 744 if (targetshouldbedirectory) 745 verifydir(targ); 746 747 (void) atomicio(vwrite, remout, "", 1); 748 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 749 targisdir = 1; 750 for (first = 1;; first = 0) { 751 cp = buf; 752 if (atomicio(read, remin, cp, 1) <= 0) 753 return; 754 if (*cp++ == '\n') 755 SCREWUP("unexpected <newline>"); 756 do { 757 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 758 SCREWUP("lost connection"); 759 *cp++ = ch; 760 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 761 *cp = 0; 762 763 if (buf[0] == '\01' || buf[0] == '\02') { 764 if (iamremote == 0) 765 (void) atomicio(vwrite, STDERR_FILENO, 766 buf + 1, strlen(buf + 1)); 767 if (buf[0] == '\02') 768 exit(1); 769 ++errs; 770 continue; 771 } 772 if (buf[0] == 'E') { 773 (void) atomicio(vwrite, remout, "", 1); 774 return; 775 } 776 if (ch == '\n') 777 *--cp = 0; 778 779 cp = buf; 780 if (*cp == 'T') { 781 setimes++; 782 cp++; 783 mtime.tv_sec = strtol(cp, &cp, 10); 784 if (!cp || *cp++ != ' ') 785 SCREWUP("mtime.sec not delimited"); 786 mtime.tv_usec = strtol(cp, &cp, 10); 787 if (!cp || *cp++ != ' ') 788 SCREWUP("mtime.usec not delimited"); 789 atime.tv_sec = strtol(cp, &cp, 10); 790 if (!cp || *cp++ != ' ') 791 SCREWUP("atime.sec not delimited"); 792 atime.tv_usec = strtol(cp, &cp, 10); 793 if (!cp || *cp++ != '\0') 794 SCREWUP("atime.usec not delimited"); 795 (void) atomicio(vwrite, remout, "", 1); 796 continue; 797 } 798 if (*cp != 'C' && *cp != 'D') { 799 /* 800 * Check for the case "rcp remote:foo\* local:bar". 801 * In this case, the line "No match." can be returned 802 * by the shell before the rcp command on the remote is 803 * executed so the ^Aerror_message convention isn't 804 * followed. 805 */ 806 if (first) { 807 run_err("%s", cp); 808 exit(1); 809 } 810 SCREWUP("expected control record"); 811 } 812 mode = 0; 813 for (++cp; cp < buf + 5; cp++) { 814 if (*cp < '0' || *cp > '7') 815 SCREWUP("bad mode"); 816 mode = (mode << 3) | (*cp - '0'); 817 } 818 if (*cp++ != ' ') 819 SCREWUP("mode not delimited"); 820 821 for (size = 0; isdigit(*cp);) 822 size = size * 10 + (*cp++ - '0'); 823 if (*cp++ != ' ') 824 SCREWUP("size not delimited"); 825 if (targisdir) { 826 static char *namebuf; 827 static int cursize; 828 size_t need; 829 830 need = strlen(targ) + strlen(cp) + 250; 831 if (need > cursize) { 832 if (namebuf) 833 xfree(namebuf); 834 namebuf = xmalloc(need); 835 cursize = need; 836 } 837 (void) snprintf(namebuf, need, "%s%s%s", targ, 838 strcmp(targ, "/") ? "/" : "", cp); 839 np = namebuf; 840 } else 841 np = targ; 842 curfile = cp; 843 exists = stat(np, &stb) == 0; 844 if (buf[0] == 'D') { 845 int mod_flag = pflag; 846 if (exists) { 847 if (!S_ISDIR(stb.st_mode)) { 848 errno = ENOTDIR; 849 goto bad; 850 } 851 if (pflag) 852 (void) chmod(np, mode); 853 } else { 854 /* Handle copying from a read-only 855 directory */ 856 mod_flag = 1; 857 if (mkdir(np, mode | S_IRWXU) < 0) 858 goto bad; 859 } 860 vect[0] = xstrdup(np); 861 sink(1, vect); 862 if (setimes) { 863 setimes = 0; 864 if (utimes(vect[0], tv) < 0) 865 run_err("%s: set times: %s", 866 vect[0], strerror(errno)); 867 } 868 if (mod_flag) 869 (void) chmod(vect[0], mode); 870 if (vect[0]) 871 xfree(vect[0]); 872 continue; 873 } 874 omode = mode; 875 mode |= S_IWRITE; 876 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 877 bad: run_err("%s: %s", np, strerror(errno)); 878 continue; 879 } 880 (void) atomicio(vwrite, remout, "", 1); 881 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) { 882 (void) close(ofd); 883 continue; 884 } 885 cp = bp->buf; 886 wrerr = NO; 887 888 statbytes = 0; 889 if (showprogress) 890 start_progress_meter(curfile, size, &statbytes); 891 for (count = i = 0; i < size; i += 4096) { 892 amt = 4096; 893 if (i + amt > size) 894 amt = size - i; 895 count += amt; 896 do { 897 j = read(remin, cp, amt); 898 if (j == -1 && (errno == EINTR || 899 errno == EAGAIN)) { 900 continue; 901 } else if (j <= 0) { 902 run_err("%s", j ? strerror(errno) : 903 "dropped connection"); 904 exit(1); 905 } 906 amt -= j; 907 cp += j; 908 statbytes += j; 909 } while (amt > 0); 910 911 if (limit_rate) 912 bwlimit(4096); 913 914 if (count == bp->cnt) { 915 /* Keep reading so we stay sync'd up. */ 916 if (wrerr == NO) { 917 j = atomicio(vwrite, ofd, bp->buf, count); 918 if (j != count) { 919 wrerr = YES; 920 wrerrno = j >= 0 ? EIO : errno; 921 } 922 } 923 count = 0; 924 cp = bp->buf; 925 } 926 } 927 if (showprogress) 928 stop_progress_meter(); 929 if (count != 0 && wrerr == NO && 930 (j = atomicio(vwrite, ofd, bp->buf, count)) != count) { 931 wrerr = YES; 932 wrerrno = j >= 0 ? EIO : errno; 933 } 934 if (wrerr == NO && ftruncate(ofd, size) != 0) { 935 run_err("%s: truncate: %s", np, strerror(errno)); 936 wrerr = DISPLAYED; 937 } 938 if (pflag) { 939 if (exists || omode != mode) 940 #ifdef HAVE_FCHMOD 941 if (fchmod(ofd, omode)) 942 #else /* HAVE_FCHMOD */ 943 if (chmod(np, omode)) 944 #endif /* HAVE_FCHMOD */ 945 run_err("%s: set mode: %s", 946 np, strerror(errno)); 947 } else { 948 if (!exists && omode != mode) 949 #ifdef HAVE_FCHMOD 950 if (fchmod(ofd, omode & ~mask)) 951 #else /* HAVE_FCHMOD */ 952 if (chmod(np, omode & ~mask)) 953 #endif /* HAVE_FCHMOD */ 954 run_err("%s: set mode: %s", 955 np, strerror(errno)); 956 } 957 if (close(ofd) == -1) { 958 wrerr = YES; 959 wrerrno = errno; 960 } 961 (void) response(); 962 if (setimes && wrerr == NO) { 963 setimes = 0; 964 if (utimes(np, tv) < 0) { 965 run_err("%s: set times: %s", 966 np, strerror(errno)); 967 wrerr = DISPLAYED; 968 } 969 } 970 switch (wrerr) { 971 case YES: 972 run_err("%s: %s", np, strerror(wrerrno)); 973 break; 974 case NO: 975 (void) atomicio(vwrite, remout, "", 1); 976 break; 977 case DISPLAYED: 978 break; 979 } 980 } 981 screwup: 982 run_err("protocol error: %s", why); 983 exit(1); 984 } 985 986 int 987 response(void) 988 { 989 char ch, *cp, resp, rbuf[2048]; 990 991 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 992 lostconn(0); 993 994 cp = rbuf; 995 switch (resp) { 996 case 0: /* ok */ 997 return (0); 998 default: 999 *cp++ = resp; 1000 /* FALLTHROUGH */ 1001 case 1: /* error, followed by error msg */ 1002 case 2: /* fatal error, "" */ 1003 do { 1004 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1005 lostconn(0); 1006 *cp++ = ch; 1007 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1008 1009 if (!iamremote) 1010 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1011 ++errs; 1012 if (resp == 1) 1013 return (-1); 1014 exit(1); 1015 } 1016 /* NOTREACHED */ 1017 } 1018 1019 void 1020 usage(void) 1021 { 1022 (void) fprintf(stderr, 1023 "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1024 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1025 " [[user@]host1:]file1 [...] [[user@]host2:]file2\n"); 1026 exit(1); 1027 } 1028 1029 void 1030 run_err(const char *fmt,...) 1031 { 1032 static FILE *fp; 1033 va_list ap; 1034 1035 ++errs; 1036 if (fp == NULL && !(fp = fdopen(remout, "w"))) 1037 return; 1038 (void) fprintf(fp, "%c", 0x01); 1039 (void) fprintf(fp, "scp: "); 1040 va_start(ap, fmt); 1041 (void) vfprintf(fp, fmt, ap); 1042 va_end(ap); 1043 (void) fprintf(fp, "\n"); 1044 (void) fflush(fp); 1045 1046 if (!iamremote) { 1047 va_start(ap, fmt); 1048 vfprintf(stderr, fmt, ap); 1049 va_end(ap); 1050 fprintf(stderr, "\n"); 1051 } 1052 } 1053 1054 void 1055 verifydir(char *cp) 1056 { 1057 struct stat stb; 1058 1059 if (!stat(cp, &stb)) { 1060 if (S_ISDIR(stb.st_mode)) 1061 return; 1062 errno = ENOTDIR; 1063 } 1064 run_err("%s: %s", cp, strerror(errno)); 1065 exit(1); 1066 } 1067 1068 int 1069 okname(char *cp0) 1070 { 1071 int c; 1072 char *cp; 1073 1074 cp = cp0; 1075 do { 1076 c = (int)*cp; 1077 if (c & 0200) 1078 goto bad; 1079 if (!isalpha(c) && !isdigit(c)) { 1080 switch (c) { 1081 case '\'': 1082 case '"': 1083 case '`': 1084 case ' ': 1085 case '#': 1086 goto bad; 1087 default: 1088 break; 1089 } 1090 } 1091 } while (*++cp); 1092 return (1); 1093 1094 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1095 return (0); 1096 } 1097 1098 BUF * 1099 allocbuf(BUF *bp, int fd, int blksize) 1100 { 1101 size_t size; 1102 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1103 struct stat stb; 1104 1105 if (fstat(fd, &stb) < 0) { 1106 run_err("fstat: %s", strerror(errno)); 1107 return (0); 1108 } 1109 size = roundup(stb.st_blksize, blksize); 1110 if (size == 0) 1111 size = blksize; 1112 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1113 size = blksize; 1114 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1115 if (bp->cnt >= size) 1116 return (bp); 1117 if (bp->buf == NULL) 1118 bp->buf = xmalloc(size); 1119 else 1120 bp->buf = xrealloc(bp->buf, size); 1121 memset(bp->buf, 0, size); 1122 bp->cnt = size; 1123 return (bp); 1124 } 1125 1126 void 1127 lostconn(int signo) 1128 { 1129 if (!iamremote) 1130 write(STDERR_FILENO, "lost connection\n", 16); 1131 if (signo) 1132 _exit(1); 1133 else 1134 exit(1); 1135 } 1136