1 /* 2 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 /* 6 * scp - secure remote copy. This is basically patched BSD rcp which 7 * uses ssh to do the data transfer (instead of using rcmd). 8 * 9 * NOTE: This version should NOT be suid root. (This uses ssh to 10 * do the transfer and ssh has the necessary privileges.) 11 * 12 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 13 * 14 * As far as I am concerned, the code I have written for this software 15 * can be used freely for any purpose. Any derived versions of this 16 * software must be clearly marked as such, and if the derived work is 17 * incompatible with the protocol description in the RFC file, it must be 18 * called by a name other than "ssh" or "Secure Shell". 19 */ 20 /* 21 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 22 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 2. Redistributions in binary form must reproduce the above copyright 30 * notice, this list of conditions and the following disclaimer in the 31 * documentation and/or other materials provided with the distribution. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 34 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 36 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 37 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 38 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 39 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 40 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 41 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 42 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 43 */ 44 45 /* 46 * Parts from: 47 * 48 * Copyright (c) 1983, 1990, 1992, 1993, 1995 49 * The Regents of the University of California. All rights reserved. 50 * 51 * Redistribution and use in source and binary forms, with or without 52 * modification, are permitted provided that the following conditions 53 * are met: 54 * 1. Redistributions of source code must retain the above copyright 55 * notice, this list of conditions and the following disclaimer. 56 * 2. Redistributions in binary form must reproduce the above copyright 57 * notice, this list of conditions and the following disclaimer in the 58 * documentation and/or other materials provided with the distribution. 59 * 3. All advertising materials mentioning features or use of this software 60 * must display the following acknowledgement: 61 * This product includes software developed by the University of 62 * California, Berkeley and its contributors. 63 * 4. Neither the name of the University nor the names of its contributors 64 * may be used to endorse or promote products derived from this software 65 * without specific prior written permission. 66 * 67 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 68 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 69 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 70 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 71 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 72 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 73 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 74 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 75 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 76 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 77 * SUCH DAMAGE. 78 * 79 */ 80 81 #include "includes.h" 82 RCSID("$OpenBSD: scp.c,v 1.91 2002/06/19 00:27:55 deraadt Exp $"); 83 84 #include "xmalloc.h" 85 #include "atomicio.h" 86 #include "pathnames.h" 87 #include "log.h" 88 #include "misc.h" 89 90 #ifdef HAVE___PROGNAME 91 extern char *__progname; 92 #else 93 char *__progname; 94 #endif 95 96 /* For progressmeter() -- number of seconds before xfer considered "stalled" */ 97 #define STALLTIME 5 98 /* alarm() interval for updating progress meter */ 99 #define PROGRESSTIME 1 100 101 /* Visual statistics about files as they are transferred. */ 102 void progressmeter(int); 103 104 /* Returns width of the terminal (for progress meter calculations). */ 105 int getttywidth(void); 106 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, 107 int argc); 108 109 /* Struct for addargs */ 110 arglist args; 111 112 /* Time a transfer started. */ 113 static struct timeval start; 114 115 /* Number of bytes of current file transferred so far. */ 116 volatile off_t statbytes; 117 118 /* Total size of current file. */ 119 off_t totalbytes = 0; 120 121 /* Name of current file being transferred. */ 122 char *curfile; 123 124 /* This is set to non-zero to enable verbose mode. */ 125 int verbose_mode = 0; 126 127 /* This is set to zero if the progressmeter is not desired. */ 128 int showprogress = 1; 129 130 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 131 char *ssh_program = _PATH_SSH_PROGRAM; 132 133 /* This is used to store the pid of ssh_program */ 134 static pid_t do_cmd_pid = -1; 135 136 static void 137 killchild(int signo) 138 { 139 if (do_cmd_pid > 1) { 140 kill(do_cmd_pid, signo ? signo : SIGTERM); 141 waitpid(do_cmd_pid, NULL, 0); 142 } 143 144 if (signo) 145 _exit(1); 146 exit(1); 147 } 148 149 /* 150 * Run a command via fork(2)/exec(2). This can be a local-to-local copy via 151 * cp(1) or one side of a remote-to-remote copy. We must not use system(3) here 152 * because we don't want filenames to go through a command expansion in the 153 * underlying shell. Note that the user can create a filename that is a piece of 154 * shell code itself and this must not be executed. 155 */ 156 static int 157 do_local_cmd(arglist *a) 158 { 159 uint_t i; 160 int status; 161 pid_t pid; 162 163 if (a->num == 0) 164 fatal("do_local_cmd: no arguments"); 165 166 if (verbose_mode) { 167 fprintf(stderr, gettext("Executing:")); 168 for (i = 0; i < a->num; i++) 169 fprintf(stderr, " %s", a->list[i]); 170 fprintf(stderr, "\n"); 171 } 172 if ((pid = fork()) == -1) 173 fatal("do_local_cmd: fork: %s", strerror(errno)); 174 175 if (pid == 0) { 176 execvp(a->list[0], a->list); 177 perror(a->list[0]); 178 exit(1); 179 } 180 181 do_cmd_pid = pid; 182 signal(SIGTERM, killchild); 183 signal(SIGINT, killchild); 184 signal(SIGHUP, killchild); 185 186 while (waitpid(pid, &status, 0) == -1) 187 if (errno != EINTR) 188 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 189 190 do_cmd_pid = -1; 191 192 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 193 return (-1); 194 195 return (0); 196 } 197 198 /* 199 * This function executes the given command as the specified user on the 200 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 201 * assigns the input and output file descriptors on success. 202 */ 203 204 int 205 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc) 206 { 207 int pin[2], pout[2], reserved[2]; 208 209 if (verbose_mode) 210 fprintf(stderr, 211 gettext("Executing: program %s host %s, " 212 "user %s, command %s\n"), 213 ssh_program, host, 214 remuser ? remuser : gettext("(unspecified)"), cmd); 215 216 /* 217 * Reserve two descriptors so that the real pipes won't get 218 * descriptors 0 and 1 because that will screw up dup2 below. 219 */ 220 pipe(reserved); 221 222 /* Create a socket pair for communicating with ssh. */ 223 if (pipe(pin) < 0) 224 fatal("pipe: %s", strerror(errno)); 225 if (pipe(pout) < 0) 226 fatal("pipe: %s", strerror(errno)); 227 228 /* Free the reserved descriptors. */ 229 close(reserved[0]); 230 close(reserved[1]); 231 232 /* For a child to execute the command on the remote host using ssh. */ 233 if ((do_cmd_pid = fork()) == 0) { 234 /* Child. */ 235 close(pin[1]); 236 close(pout[0]); 237 dup2(pin[0], 0); 238 dup2(pout[1], 1); 239 close(pin[0]); 240 close(pout[1]); 241 242 args.list[0] = ssh_program; 243 if (remuser != NULL) 244 addargs(&args, "-l%s", remuser); 245 addargs(&args, "%s", host); 246 addargs(&args, "%s", cmd); 247 248 execvp(ssh_program, args.list); 249 perror(ssh_program); 250 exit(1); 251 } else if (do_cmd_pid == (pid_t)-1) { 252 /* fork() failed */ 253 fatal("fork: %s", strerror(errno)); 254 } 255 256 /* Parent. Close the other side, and return the local side. */ 257 close(pin[0]); 258 *fdout = pin[1]; 259 close(pout[1]); 260 *fdin = pout[0]; 261 return (0); 262 } 263 264 typedef struct { 265 int cnt; 266 char *buf; 267 } BUF; 268 269 BUF *allocbuf(BUF *, int, int); 270 void lostconn(int); 271 void nospace(void); 272 int okname(char *); 273 void run_err(const char *, ...); 274 void verifydir(char *); 275 276 struct passwd *pwd; 277 uid_t userid; 278 int errs, remin, remout; 279 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 280 281 #define CMDNEEDS 64 282 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 283 284 int response(void); 285 void rsource(char *, struct stat *); 286 void sink(int, char *[]); 287 void source(int, char *[]); 288 void tolocal(int, char *[]); 289 void toremote(char *, int, char *[]); 290 void usage(void); 291 292 int 293 main(argc, argv) 294 int argc; 295 char *argv[]; 296 { 297 int ch, fflag, tflag, status; 298 char *targ; 299 extern char *optarg; 300 extern int optind; 301 302 __progname = get_progname(argv[0]); 303 304 g11n_setlocale(LC_ALL, ""); 305 306 args.list = NULL; 307 addargs(&args, "ssh"); /* overwritten with ssh_program */ 308 addargs(&args, "-x"); 309 addargs(&args, "-oForwardAgent no"); 310 addargs(&args, "-oClearAllForwardings yes"); 311 312 fflag = tflag = 0; 313 while ((ch = getopt(argc, argv, "dfprtvBCc:i:P:q46S:o:F:")) != -1) 314 switch (ch) { 315 /* User-visible flags. */ 316 case '4': 317 case '6': 318 case 'C': 319 addargs(&args, "-%c", ch); 320 break; 321 case 'o': 322 case 'c': 323 case 'i': 324 case 'F': 325 addargs(&args, "-%c%s", ch, optarg); 326 break; 327 case 'P': 328 addargs(&args, "-p%s", optarg); 329 break; 330 case 'B': 331 addargs(&args, "-oBatchmode yes"); 332 break; 333 case 'p': 334 pflag = 1; 335 break; 336 case 'r': 337 iamrecursive = 1; 338 break; 339 case 'S': 340 ssh_program = xstrdup(optarg); 341 break; 342 case 'v': 343 addargs(&args, "-v"); 344 verbose_mode = 1; 345 break; 346 case 'q': 347 showprogress = 0; 348 break; 349 350 /* Server options. */ 351 case 'd': 352 targetshouldbedirectory = 1; 353 break; 354 case 'f': /* "from" */ 355 iamremote = 1; 356 fflag = 1; 357 break; 358 case 't': /* "to" */ 359 iamremote = 1; 360 tflag = 1; 361 #ifdef HAVE_CYGWIN 362 setmode(0, O_BINARY); 363 #endif 364 break; 365 default: 366 usage(); 367 } 368 argc -= optind; 369 argv += optind; 370 371 if ((pwd = getpwuid(userid = getuid())) == NULL) 372 fatal("unknown user %d", (int)userid); 373 374 if (!isatty(STDERR_FILENO)) 375 showprogress = 0; 376 377 remin = STDIN_FILENO; 378 remout = STDOUT_FILENO; 379 380 if (fflag) { 381 /* Follow "protocol", send data. */ 382 (void) response(); 383 source(argc, argv); 384 exit(errs != 0); 385 } 386 if (tflag) { 387 /* Receive data. */ 388 sink(argc, argv); 389 exit(errs != 0); 390 } 391 if (argc < 2) 392 usage(); 393 if (argc > 2) 394 targetshouldbedirectory = 1; 395 396 remin = remout = -1; 397 do_cmd_pid = (pid_t)-1; 398 399 /* Command to be executed on remote system using "ssh". */ 400 (void) snprintf(cmd, sizeof (cmd), "scp%s%s%s%s", 401 verbose_mode ? " -v" : "", 402 iamrecursive ? " -r" : "", pflag ? " -p" : "", 403 targetshouldbedirectory ? " -d" : ""); 404 405 (void) signal(SIGPIPE, lostconn); 406 407 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 408 toremote(targ, argc, argv); 409 else { 410 if (targetshouldbedirectory) 411 verifydir(argv[argc - 1]); 412 tolocal(argc, argv); /* Dest is local host. */ 413 } 414 /* 415 * Finally check the exit status of the ssh process, if one was forked 416 * and no error has occurred yet 417 */ 418 if (do_cmd_pid != (pid_t)-1 && errs == 0) { 419 if (remin != -1) { 420 (void) close(remin); 421 } 422 if (remout != -1) { 423 (void) close(remout); 424 } 425 if (waitpid(do_cmd_pid, &status, 0) == -1) { 426 errs = 1; 427 } else if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { 428 errs = 1; 429 } 430 } 431 432 return (errs != 0); 433 } 434 435 void 436 toremote(targ, argc, argv) 437 char *targ, *argv[]; 438 int argc; 439 { 440 int i, len; 441 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 442 arglist alist; 443 444 memset(&alist, '\0', sizeof (alist)); 445 alist.list = NULL; 446 447 *targ++ = 0; 448 if (*targ == 0) 449 targ = "."; 450 451 arg = xstrdup(argv[argc - 1]); 452 if ((thost = strchr(arg, '@'))) { 453 /* user@host */ 454 *thost++ = 0; 455 tuser = arg; 456 if (*tuser == '\0') 457 tuser = NULL; 458 else if (!okname(tuser)) 459 exit(1); 460 } else { 461 thost = arg; 462 tuser = NULL; 463 } 464 465 if (tuser != NULL && !okname(tuser)) { 466 xfree(arg); 467 return; 468 } 469 470 for (i = 0; i < argc - 1; i++) { 471 src = colon(argv[i]); 472 if (src) { /* remote to remote */ 473 freeargs(&alist); 474 addargs(&alist, "%s", ssh_program); 475 if (verbose_mode) 476 addargs(&alist, "-v"); 477 addargs(&alist, "-x"); 478 addargs(&alist, "-oClearAllForwardings yes"); 479 addargs(&alist, "-n"); 480 481 *src++ = 0; 482 if (*src == 0) 483 src = "."; 484 host = strchr(argv[i], '@'); 485 486 if (host) { 487 *host++ = 0; 488 host = cleanhostname(host); 489 suser = argv[i]; 490 if (*suser == '\0') 491 suser = pwd->pw_name; 492 else if (!okname(suser)) 493 continue; 494 addargs(&alist, "-l"); 495 addargs(&alist, "%s", suser); 496 } else { 497 host = cleanhostname(argv[i]); 498 } 499 addargs(&alist, "%s", host); 500 addargs(&alist, "%s", cmd); 501 addargs(&alist, "%s", src); 502 addargs(&alist, "%s%s%s:%s", 503 tuser ? tuser : "", tuser ? "@" : "", 504 thost, targ); 505 if (do_local_cmd(&alist) != 0) 506 errs = 1; 507 } else { /* local to remote */ 508 if (remin == -1) { 509 len = strlen(targ) + CMDNEEDS + 20; 510 bp = xmalloc(len); 511 (void) snprintf(bp, len, "%s -t %s", cmd, targ); 512 host = cleanhostname(thost); 513 if (do_cmd(host, tuser, bp, &remin, 514 &remout, argc) < 0) 515 exit(1); 516 if (response() < 0) 517 exit(1); 518 (void) xfree(bp); 519 } 520 source(1, argv + i); 521 } 522 } 523 } 524 525 void 526 tolocal(argc, argv) 527 int argc; 528 char *argv[]; 529 { 530 int i, len; 531 char *bp, *host, *src, *suser; 532 arglist alist; 533 534 memset(&alist, '\0', sizeof (alist)); 535 alist.list = NULL; 536 537 for (i = 0; i < argc - 1; i++) { 538 if (!(src = colon(argv[i]))) { /* Local to local. */ 539 freeargs(&alist); 540 addargs(&alist, "%s", _PATH_CP); 541 if (iamrecursive) 542 addargs(&alist, "-r"); 543 if (pflag) 544 addargs(&alist, "-p"); 545 addargs(&alist, "%s", argv[i]); 546 addargs(&alist, "%s", argv[argc-1]); 547 if (do_local_cmd(&alist)) 548 ++errs; 549 continue; 550 } 551 *src++ = 0; 552 if (*src == 0) 553 src = "."; 554 if ((host = strchr(argv[i], '@')) == NULL) { 555 host = argv[i]; 556 suser = NULL; 557 } else { 558 *host++ = 0; 559 suser = argv[i]; 560 if (*suser == '\0') 561 suser = pwd->pw_name; 562 else if (!okname(suser)) 563 continue; 564 } 565 host = cleanhostname(host); 566 len = strlen(src) + CMDNEEDS + 20; 567 bp = xmalloc(len); 568 (void) snprintf(bp, len, "%s -f %s", cmd, src); 569 if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) { 570 (void) xfree(bp); 571 ++errs; 572 continue; 573 } 574 xfree(bp); 575 sink(1, argv + argc - 1); 576 (void) close(remin); 577 remin = remout = -1; 578 } 579 } 580 581 void 582 source(argc, argv) 583 int argc; 584 char *argv[]; 585 { 586 struct stat stb; 587 static BUF buffer; 588 BUF *bp; 589 off_t i, amt, result; 590 int fd, haderr, indx; 591 char *last, *name, buf[2048]; 592 int len; 593 594 for (indx = 0; indx < argc; ++indx) { 595 name = argv[indx]; 596 statbytes = 0; 597 len = strlen(name); 598 while (len > 1 && name[len-1] == '/') 599 name[--len] = '\0'; 600 if (strchr(name, '\n') != NULL) { 601 run_err("%s: skipping, filename contains a newline", 602 name); 603 goto next; 604 } 605 if ((fd = open(name, O_RDONLY, 0)) < 0) 606 goto syserr; 607 if (fstat(fd, &stb) < 0) { 608 syserr: run_err("%s: %s", name, strerror(errno)); 609 goto next; 610 } 611 switch (stb.st_mode & S_IFMT) { 612 case S_IFREG: 613 break; 614 case S_IFDIR: 615 if (iamrecursive) { 616 rsource(name, &stb); 617 goto next; 618 } 619 /* FALLTHROUGH */ 620 default: 621 run_err("%s: not a regular file", name); 622 goto next; 623 } 624 if ((last = strrchr(name, '/')) == NULL) 625 last = name; 626 else 627 ++last; 628 curfile = last; 629 if (pflag) { 630 /* 631 * Make it compatible with possible future 632 * versions expecting microseconds. 633 */ 634 (void) snprintf(buf, sizeof (buf), "T%lu 0 %lu 0\n", 635 (ulong_t)stb.st_mtime, 636 (ulong_t)stb.st_atime); 637 (void) atomicio(write, remout, buf, strlen(buf)); 638 if (response() < 0) 639 goto next; 640 } 641 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 642 #ifdef HAVE_LONG_LONG_INT 643 snprintf(buf, sizeof (buf), "C%04o %lld %s\n", 644 (uint_t)(stb.st_mode & FILEMODEMASK), 645 (long long)stb.st_size, last); 646 #else 647 /* XXX: Handle integer overflow? */ 648 snprintf(buf, sizeof (buf), "C%04o %lu %s\n", 649 (uint_t)(stb.st_mode & FILEMODEMASK), 650 (ulong_t)stb.st_size, last); 651 #endif 652 if (verbose_mode) { 653 fprintf(stderr, gettext("Sending file modes: %s"), buf); 654 fflush(stderr); 655 } 656 (void) atomicio(write, remout, buf, strlen(buf)); 657 if (response() < 0) 658 goto next; 659 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { 660 next: (void) close(fd); 661 continue; 662 } 663 if (showprogress) { 664 totalbytes = stb.st_size; 665 progressmeter(-1); 666 } 667 /* Keep writing after an error so that we stay sync'd up. */ 668 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 669 amt = bp->cnt; 670 if (i + amt > stb.st_size) 671 amt = stb.st_size - i; 672 if (!haderr) { 673 result = atomicio(read, fd, bp->buf, amt); 674 if (result != amt) 675 haderr = result >= 0 ? EIO : errno; 676 } 677 if (haderr) 678 (void) atomicio(write, remout, bp->buf, amt); 679 else { 680 result = atomicio(write, remout, bp->buf, amt); 681 if (result != amt) 682 haderr = result >= 0 ? EIO : errno; 683 statbytes += result; 684 } 685 } 686 if (showprogress) 687 progressmeter(1); 688 689 if (close(fd) < 0 && !haderr) 690 haderr = errno; 691 if (!haderr) 692 (void) atomicio(write, remout, "", 1); 693 else 694 run_err("%s: %s", name, strerror(haderr)); 695 (void) response(); 696 } 697 } 698 699 void 700 rsource(name, statp) 701 char *name; 702 struct stat *statp; 703 { 704 DIR *dirp; 705 struct dirent *dp; 706 char *last, *vect[1], path[1100]; 707 708 if (!(dirp = opendir(name))) { 709 run_err("%s: %s", name, strerror(errno)); 710 return; 711 } 712 last = strrchr(name, '/'); 713 if (last == 0) 714 last = name; 715 else 716 last++; 717 if (pflag) { 718 (void) snprintf(path, sizeof (path), "T%lu 0 %lu 0\n", 719 (ulong_t)statp->st_mtime, 720 (ulong_t)statp->st_atime); 721 (void) atomicio(write, remout, path, strlen(path)); 722 if (response() < 0) { 723 closedir(dirp); 724 return; 725 } 726 } 727 (void) snprintf(path, sizeof (path), "D%04o %d %.1024s\n", 728 (uint_t)(statp->st_mode & FILEMODEMASK), 0, last); 729 if (verbose_mode) 730 fprintf(stderr, gettext("Entering directory: %s"), path); 731 (void) atomicio(write, remout, path, strlen(path)); 732 if (response() < 0) { 733 closedir(dirp); 734 return; 735 } 736 while ((dp = readdir(dirp)) != NULL) { 737 if (dp->d_ino == 0) 738 continue; 739 if ((strcmp(dp->d_name, ".") == 0) || 740 (strcmp(dp->d_name, "..") == 0)) 741 continue; 742 if (strlen(name) + 1 + strlen(dp->d_name) >= 743 sizeof (path) - 1) { 744 run_err("%s/%s: name too long", name, dp->d_name); 745 continue; 746 } 747 (void) snprintf(path, sizeof (path), "%s/%s", name, dp->d_name); 748 vect[0] = path; 749 source(1, vect); 750 } 751 (void) closedir(dirp); 752 (void) atomicio(write, remout, "E\n", 2); 753 (void) response(); 754 } 755 756 void 757 sink(argc, argv) 758 int argc; 759 char *argv[]; 760 { 761 static BUF buffer; 762 struct stat stb; 763 enum { 764 YES, NO, DISPLAYED 765 } wrerr; 766 BUF *bp; 767 off_t i, j; 768 int amt, count, exists, first, mask, mode, ofd, omode; 769 off_t size; 770 int setimes, targisdir, wrerrno = 0; 771 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; 772 struct timeval tv[2]; 773 774 #define atime tv[0] 775 #define mtime tv[1] 776 #define SCREWUP(str) { why = str; goto screwup; } 777 778 setimes = targisdir = 0; 779 mask = umask(0); 780 if (!pflag) 781 (void) umask(mask); 782 if (argc != 1) { 783 run_err("ambiguous target"); 784 exit(1); 785 } 786 targ = *argv; 787 if (targetshouldbedirectory) 788 verifydir(targ); 789 790 (void) atomicio(write, remout, "", 1); 791 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 792 targisdir = 1; 793 for (first = 1; ; first = 0) { 794 cp = buf; 795 if (atomicio(read, remin, cp, 1) <= 0) 796 return; 797 if (*cp++ == '\n') 798 SCREWUP("unexpected <newline>") 799 do { 800 if (atomicio(read, remin, &ch, sizeof (ch)) != 801 sizeof (ch)) 802 SCREWUP("lost connection") 803 *cp++ = ch; 804 } while (cp < &buf[sizeof (buf) - 1] && ch != '\n'); 805 *cp = 0; 806 807 if (buf[0] == '\01' || buf[0] == '\02') { 808 if (iamremote == 0) 809 (void) atomicio(write, STDERR_FILENO, 810 buf + 1, strlen(buf + 1)); 811 if (buf[0] == '\02') 812 exit(1); 813 ++errs; 814 continue; 815 } 816 if (buf[0] == 'E') { 817 (void) atomicio(write, remout, "", 1); 818 return; 819 } 820 if (ch == '\n') 821 *--cp = 0; 822 823 cp = buf; 824 if (*cp == 'T') { 825 setimes++; 826 cp++; 827 mtime.tv_sec = strtol(cp, &cp, 10); 828 if (!cp || *cp++ != ' ') 829 SCREWUP("mtime.sec not delimited") 830 mtime.tv_usec = strtol(cp, &cp, 10); 831 if (!cp || *cp++ != ' ') 832 SCREWUP("mtime.usec not delimited") 833 atime.tv_sec = strtol(cp, &cp, 10); 834 if (!cp || *cp++ != ' ') 835 SCREWUP("atime.sec not delimited") 836 atime.tv_usec = strtol(cp, &cp, 10); 837 if (!cp || *cp++ != '\0') 838 SCREWUP("atime.usec not delimited") 839 (void) atomicio(write, remout, "", 1); 840 continue; 841 } 842 if (*cp != 'C' && *cp != 'D') { 843 /* 844 * Check for the case "rcp remote:foo\* local:bar". 845 * In this case, the line "No match." can be returned 846 * by the shell before the rcp command on the remote is 847 * executed so the ^Aerror_message convention isn't 848 * followed. 849 */ 850 if (first) { 851 run_err("%s", cp); 852 exit(1); 853 } 854 SCREWUP("expected control record") 855 } 856 mode = 0; 857 for (++cp; cp < buf + 5; cp++) { 858 if (*cp < '0' || *cp > '7') 859 SCREWUP("bad mode") 860 mode = (mode << 3) | (*cp - '0'); 861 } 862 if (*cp++ != ' ') 863 SCREWUP("mode not delimited") 864 865 for (size = 0; isdigit(*cp); ) 866 size = size * 10 + (*cp++ - '0'); 867 if (*cp++ != ' ') 868 SCREWUP("size not delimited") 869 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 870 run_err("error: unexpected filename: %s", cp); 871 exit(1); 872 } 873 if (targisdir) { 874 static char *namebuf; 875 static int cursize; 876 size_t need; 877 878 need = strlen(targ) + strlen(cp) + 250; 879 if (need > cursize) { 880 if (namebuf) 881 xfree(namebuf); 882 namebuf = xmalloc(need); 883 cursize = need; 884 } 885 (void) snprintf(namebuf, need, "%s%s%s", targ, 886 strcmp(targ, "/") ? "/" : "", cp); 887 np = namebuf; 888 } else 889 np = targ; 890 curfile = cp; 891 exists = stat(np, &stb) == 0; 892 if (buf[0] == 'D') { 893 int mod_flag = pflag; 894 if (!iamrecursive) 895 SCREWUP("received directory without -r"); 896 if (exists) { 897 if (!S_ISDIR(stb.st_mode)) { 898 errno = ENOTDIR; 899 goto bad; 900 } 901 if (pflag) 902 (void) chmod(np, mode); 903 } else { 904 /* 905 * Handle copying from a read-only 906 * directory 907 */ 908 mod_flag = 1; 909 if (mkdir(np, mode | S_IRWXU) < 0) 910 goto bad; 911 } 912 vect[0] = xstrdup(np); 913 sink(1, vect); 914 if (setimes) { 915 setimes = 0; 916 if (utimes(vect[0], tv) < 0) 917 run_err("%s: set times: %s", 918 vect[0], strerror(errno)); 919 } 920 if (mod_flag) 921 (void) chmod(vect[0], mode); 922 if (vect[0]) 923 xfree(vect[0]); 924 continue; 925 } 926 omode = mode; 927 mode |= S_IWRITE; 928 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 929 bad: run_err("%s: %s", np, strerror(errno)); 930 continue; 931 } 932 (void) atomicio(write, remout, "", 1); 933 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) { 934 (void) close(ofd); 935 continue; 936 } 937 wrerr = NO; 938 939 if (showprogress) { 940 totalbytes = size; 941 progressmeter(-1); 942 } 943 statbytes = 0; 944 for (i = 0; i < size; i += bp->cnt) { 945 amt = bp->cnt; 946 cp = bp->buf; 947 if (i + amt > size) 948 amt = size - i; 949 count = amt; 950 do { 951 j = read(remin, cp, amt); 952 if (j == -1 && (errno == EINTR || 953 errno == EAGAIN)) { 954 continue; 955 } else if (j <= 0) { 956 run_err("%s", j ? strerror(errno) : 957 "dropped connection"); 958 exit(1); 959 } 960 amt -= j; 961 cp += j; 962 statbytes += j; 963 } while (amt > 0); 964 /* Keep reading so we stay sync'd up. */ 965 if (wrerr == NO) { 966 j = atomicio(write, ofd, bp->buf, 967 count); 968 if (j != count) { 969 wrerr = YES; 970 wrerrno = j >= 0 ? EIO : errno; 971 } 972 } 973 } 974 if (showprogress) 975 progressmeter(1); 976 if (ftruncate(ofd, size)) { 977 run_err("%s: truncate: %s", np, strerror(errno)); 978 wrerr = DISPLAYED; 979 } 980 if (pflag) { 981 if (exists || omode != mode) 982 #ifdef HAVE_FCHMOD 983 if (fchmod(ofd, omode)) { 984 #else /* HAVE_FCHMOD */ 985 if (chmod(np, omode)) { 986 #endif /* HAVE_FCHMOD */ 987 run_err("%s: set mode: %s", 988 np, strerror(errno)); 989 wrerr = DISPLAYED; 990 } 991 } else { 992 if (!exists && omode != mode) 993 #ifdef HAVE_FCHMOD 994 if (fchmod(ofd, omode & ~mask)) { 995 #else /* HAVE_FCHMOD */ 996 if (chmod(np, omode & ~mask)) { 997 #endif /* HAVE_FCHMOD */ 998 run_err("%s: set mode: %s", 999 np, strerror(errno)); 1000 wrerr = DISPLAYED; 1001 } 1002 } 1003 if (close(ofd) == -1) { 1004 wrerr = YES; 1005 wrerrno = errno; 1006 } 1007 (void) response(); 1008 if (setimes && wrerr == NO) { 1009 setimes = 0; 1010 if (utimes(np, tv) < 0) { 1011 run_err("%s: set times: %s", 1012 np, strerror(errno)); 1013 wrerr = DISPLAYED; 1014 } 1015 } 1016 switch (wrerr) { 1017 case YES: 1018 run_err("%s: %s", np, strerror(wrerrno)); 1019 break; 1020 case NO: 1021 (void) atomicio(write, remout, "", 1); 1022 break; 1023 case DISPLAYED: 1024 break; 1025 } 1026 } 1027 screwup: 1028 run_err("protocol error: %s", why); 1029 exit(1); 1030 } 1031 1032 int 1033 response(void) 1034 { 1035 char ch, *cp, resp, rbuf[2048]; 1036 1037 if (atomicio(read, remin, &resp, sizeof (resp)) != sizeof (resp)) 1038 lostconn(0); 1039 1040 cp = rbuf; 1041 switch (resp) { 1042 case 0: /* ok */ 1043 return (0); 1044 default: 1045 *cp++ = resp; 1046 /* FALLTHROUGH */ 1047 case 1: /* error, followed by error msg */ 1048 case 2: /* fatal error, "" */ 1049 do { 1050 if (atomicio(read, remin, &ch, sizeof (ch)) != 1051 sizeof (ch)) 1052 lostconn(0); 1053 *cp++ = ch; 1054 } while (cp < &rbuf[sizeof (rbuf) - 1] && ch != '\n'); 1055 1056 if (!iamremote) 1057 (void) atomicio(write, STDERR_FILENO, rbuf, cp - rbuf); 1058 ++errs; 1059 if (resp == 1) 1060 return (-1); 1061 exit(1); 1062 } 1063 /* NOTREACHED */ 1064 } 1065 1066 void 1067 usage(void) 1068 { 1069 (void) fprintf(stderr, 1070 gettext( 1071 "Usage: scp [-pqrvBC46] [-F config] [-S program] [-P port]\n" 1072 " [-c cipher] [-i identity] [-o option]\n" 1073 " [[user@]host1:]file1 [...] " 1074 "[[user@]host2:]file2\n")); 1075 exit(1); 1076 } 1077 1078 /* PRINTFLIKE1 */ 1079 void 1080 run_err(const char *fmt, ...) 1081 { 1082 static FILE *fp; 1083 va_list ap; 1084 1085 ++errs; 1086 1087 if (!iamremote) { 1088 va_start(ap, fmt); 1089 vfprintf(stderr, fmt, ap); 1090 va_end(ap); 1091 fprintf(stderr, "\n"); 1092 } 1093 1094 if (fp == NULL && !(fp = fdopen(remout, "w"))) 1095 return; 1096 1097 (void) fprintf(fp, "%c", 0x01); 1098 (void) fprintf(fp, "scp: "); 1099 va_start(ap, fmt); 1100 (void) vfprintf(fp, fmt, ap); 1101 va_end(ap); 1102 (void) fprintf(fp, "\n"); 1103 (void) fflush(fp); 1104 1105 } 1106 1107 void 1108 verifydir(cp) 1109 char *cp; 1110 { 1111 struct stat stb; 1112 1113 if (!stat(cp, &stb)) { 1114 if (S_ISDIR(stb.st_mode)) 1115 return; 1116 errno = ENOTDIR; 1117 } 1118 run_err("%s: %s", cp, strerror(errno)); 1119 exit(1); 1120 } 1121 1122 int 1123 okname(cp0) 1124 char *cp0; 1125 { 1126 int c; 1127 char *cp; 1128 1129 cp = cp0; 1130 do { 1131 c = (int)*cp; 1132 if (c & 0200) 1133 goto bad; 1134 if (!isalpha(c) && !isdigit(c) && 1135 c != '_' && c != '-' && c != '.' && c != '+') 1136 goto bad; 1137 } while (*++cp); 1138 return (1); 1139 1140 bad: fprintf(stderr, gettext("%s: invalid user name\n"), cp0); 1141 return (0); 1142 } 1143 1144 BUF * 1145 allocbuf(bp, fd, blksize) 1146 BUF *bp; 1147 int fd, blksize; 1148 { 1149 size_t size; 1150 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE 1151 struct stat stb; 1152 1153 if (fstat(fd, &stb) < 0) { 1154 run_err("fstat: %s", strerror(errno)); 1155 return (0); 1156 } 1157 if (stb.st_blksize == 0) 1158 size = blksize; 1159 else 1160 size = blksize + (stb.st_blksize - blksize % stb.st_blksize) % 1161 stb.st_blksize; 1162 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1163 size = blksize; 1164 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */ 1165 if (bp->cnt >= size) 1166 return (bp); 1167 if (bp->buf == NULL) 1168 bp->buf = xmalloc(size); 1169 else 1170 bp->buf = xrealloc(bp->buf, size); 1171 memset(bp->buf, 0, size); 1172 bp->cnt = size; 1173 return (bp); 1174 } 1175 1176 void 1177 lostconn(signo) 1178 int signo; 1179 { 1180 if (!iamremote) 1181 write(STDERR_FILENO, "lost connection\n", 16); 1182 if (signo) 1183 _exit(1); 1184 else 1185 exit(1); 1186 } 1187 1188 static void 1189 updateprogressmeter(int ignore) 1190 { 1191 int save_errno = errno; 1192 1193 progressmeter(0); 1194 signal(SIGALRM, updateprogressmeter); 1195 alarm(PROGRESSTIME); 1196 errno = save_errno; 1197 } 1198 1199 static int 1200 foregroundproc(void) 1201 { 1202 static pid_t pgrp = -1; 1203 int ctty_pgrp; 1204 1205 if (pgrp == -1) 1206 pgrp = getpgrp(); 1207 1208 #ifdef HAVE_TCGETPGRP 1209 return ((ctty_pgrp = tcgetpgrp(STDOUT_FILENO)) != -1 && 1210 ctty_pgrp == pgrp); 1211 #else 1212 return ((ioctl(STDOUT_FILENO, TIOCGPGRP, &ctty_pgrp) != -1 && 1213 ctty_pgrp == pgrp)); 1214 #endif 1215 } 1216 1217 void 1218 progressmeter(int flag) 1219 { 1220 static const char prefixes[] = " KMGTP"; 1221 static struct timeval lastupdate; 1222 static off_t lastsize; 1223 struct timeval now, td, wait; 1224 off_t cursize, abbrevsize; 1225 double elapsed; 1226 int ratio, barlength, i, remaining; 1227 char buf[512]; 1228 1229 if (flag == -1) { 1230 (void) gettimeofday(&start, (struct timezone *)0); 1231 lastupdate = start; 1232 lastsize = 0; 1233 } 1234 if (foregroundproc() == 0) 1235 return; 1236 1237 (void) gettimeofday(&now, (struct timezone *)0); 1238 cursize = statbytes; 1239 if (totalbytes != 0) { 1240 ratio = (int)(100.0 * cursize / totalbytes); 1241 ratio = MAX(ratio, 0); 1242 ratio = MIN(ratio, 100); 1243 } else 1244 ratio = 100; 1245 1246 snprintf(buf, sizeof (buf), "\r%-20.20s %3d%% ", curfile, ratio); 1247 1248 barlength = getttywidth() - 51; 1249 if (barlength > 0) { 1250 i = barlength * ratio / 100; 1251 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), 1252 "|%.*s%*s|", i, 1253 "*******************************************************" 1254 "*******************************************************" 1255 "*******************************************************" 1256 "*******************************************************" 1257 "*******************************************************" 1258 "*******************************************************" 1259 "*******************************************************", 1260 barlength - i, ""); 1261 } 1262 i = 0; 1263 abbrevsize = cursize; 1264 while (abbrevsize >= 100000 && i < strlen(prefixes) - 1) { 1265 i++; 1266 abbrevsize >>= 10; 1267 } 1268 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), " %5lu %c%c ", 1269 (unsigned long) abbrevsize, prefixes[i], 1270 prefixes[i] == ' ' ? ' ' : 'B'); 1271 1272 timersub(&now, &lastupdate, &wait); 1273 if (cursize > lastsize) { 1274 lastupdate = now; 1275 lastsize = cursize; 1276 if (wait.tv_sec >= STALLTIME) { 1277 start.tv_sec += wait.tv_sec; 1278 start.tv_usec += wait.tv_usec; 1279 } 1280 wait.tv_sec = 0; 1281 } 1282 timersub(&now, &start, &td); 1283 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 1284 1285 if (flag != 1 && 1286 (statbytes <= 0 || elapsed <= 0.0 || cursize > totalbytes)) { 1287 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), 1288 " --:-- ETA"); 1289 } else if (wait.tv_sec >= STALLTIME) { 1290 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), 1291 " - stalled -"); 1292 } else { 1293 if (flag != 1) 1294 remaining = (int)(totalbytes / (statbytes / elapsed) - 1295 elapsed); 1296 else 1297 remaining = (int)elapsed; 1298 1299 i = remaining / 3600; 1300 if (i) 1301 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), 1302 "%2d:", i); 1303 else 1304 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), 1305 " "); 1306 i = remaining % 3600; 1307 snprintf(buf + strlen(buf), sizeof (buf) - strlen(buf), 1308 "%02d:%02d%s", i / 60, i % 60, 1309 (flag != 1) ? " ETA" : " "); 1310 } 1311 atomicio(write, fileno(stdout), buf, strlen(buf)); 1312 1313 if (flag == -1) { 1314 mysignal(SIGALRM, updateprogressmeter); 1315 alarm(PROGRESSTIME); 1316 } else if (flag == 1) { 1317 alarm(0); 1318 atomicio(write, fileno(stdout), "\n", 1); 1319 statbytes = 0; 1320 } 1321 } 1322 1323 int 1324 getttywidth(void) 1325 { 1326 struct winsize winsize; 1327 1328 if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1) 1329 return (winsize.ws_col ? winsize.ws_col : 80); 1330 else 1331 return (80); 1332 } 1333