1 /* $OpenBSD: scp.c,v 1.213 2020/10/18 11:32:01 djm Exp $ */ 2 /* 3 * scp - secure remote copy. This is basically patched BSD rcp which 4 * uses ssh to do the data transfer (instead of using rcmd). 5 * 6 * NOTE: This version should NOT be suid root. (This uses ssh to 7 * do the transfer and ssh has the necessary privileges.) 8 * 9 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 10 * 11 * As far as I am concerned, the code I have written for this software 12 * can be used freely for any purpose. Any derived versions of this 13 * software must be clearly marked as such, and if the derived work is 14 * incompatible with the protocol description in the RFC file, it must be 15 * called by a name other than "ssh" or "Secure Shell". 16 */ 17 /* 18 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 19 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Parts from: 44 * 45 * Copyright (c) 1983, 1990, 1992, 1993, 1995 46 * The Regents of the University of California. All rights reserved. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 */ 73 74 #include <sys/types.h> 75 #include <sys/poll.h> 76 #include <sys/wait.h> 77 #include <sys/stat.h> 78 #include <sys/time.h> 79 #include <sys/uio.h> 80 81 #include <ctype.h> 82 #include <dirent.h> 83 #include <errno.h> 84 #include <fcntl.h> 85 #include <fnmatch.h> 86 #include <locale.h> 87 #include <pwd.h> 88 #include <signal.h> 89 #include <stdarg.h> 90 #include <stdint.h> 91 #include <stdio.h> 92 #include <stdlib.h> 93 #include <string.h> 94 #include <time.h> 95 #include <unistd.h> 96 #include <limits.h> 97 #include <vis.h> 98 99 #include "xmalloc.h" 100 #include "ssh.h" 101 #include "atomicio.h" 102 #include "pathnames.h" 103 #include "log.h" 104 #include "misc.h" 105 #include "progressmeter.h" 106 #include "utf8.h" 107 108 #define COPY_BUFLEN 16384 109 110 int do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout); 111 int do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout); 112 113 /* Struct for addargs */ 114 arglist args; 115 arglist remote_remote_args; 116 117 /* Bandwidth limit */ 118 long long limit_kbps = 0; 119 struct bwlimit bwlimit; 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 /* 131 * This is set to non-zero if remote-remote copy should be piped 132 * through this process. 133 */ 134 int throughlocal = 0; 135 136 /* Non-standard port to use for the ssh connection or -1. */ 137 int sshport = -1; 138 139 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 140 char *ssh_program = _PATH_SSH_PROGRAM; 141 142 /* This is used to store the pid of ssh_program */ 143 pid_t do_cmd_pid = -1; 144 145 static void 146 killchild(int signo) 147 { 148 if (do_cmd_pid > 1) { 149 kill(do_cmd_pid, signo ? signo : SIGTERM); 150 waitpid(do_cmd_pid, NULL, 0); 151 } 152 153 if (signo) 154 _exit(1); 155 exit(1); 156 } 157 158 static void 159 suspchild(int signo) 160 { 161 int status; 162 163 if (do_cmd_pid > 1) { 164 kill(do_cmd_pid, signo); 165 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 166 errno == EINTR) 167 ; 168 kill(getpid(), SIGSTOP); 169 } 170 } 171 172 static int 173 do_local_cmd(arglist *a) 174 { 175 u_int i; 176 int status; 177 pid_t pid; 178 179 if (a->num == 0) 180 fatal("do_local_cmd: no arguments"); 181 182 if (verbose_mode) { 183 fprintf(stderr, "Executing:"); 184 for (i = 0; i < a->num; i++) 185 fmprintf(stderr, " %s", a->list[i]); 186 fprintf(stderr, "\n"); 187 } 188 if ((pid = fork()) == -1) 189 fatal("do_local_cmd: fork: %s", strerror(errno)); 190 191 if (pid == 0) { 192 execvp(a->list[0], a->list); 193 perror(a->list[0]); 194 exit(1); 195 } 196 197 do_cmd_pid = pid; 198 ssh_signal(SIGTERM, killchild); 199 ssh_signal(SIGINT, killchild); 200 ssh_signal(SIGHUP, killchild); 201 202 while (waitpid(pid, &status, 0) == -1) 203 if (errno != EINTR) 204 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 205 206 do_cmd_pid = -1; 207 208 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 209 return (-1); 210 211 return (0); 212 } 213 214 /* 215 * This function executes the given command as the specified user on the 216 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 217 * assigns the input and output file descriptors on success. 218 */ 219 220 int 221 do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout) 222 { 223 int pin[2], pout[2], reserved[2]; 224 225 if (verbose_mode) 226 fmprintf(stderr, 227 "Executing: program %s host %s, user %s, command %s\n", 228 ssh_program, host, 229 remuser ? remuser : "(unspecified)", cmd); 230 231 if (port == -1) 232 port = sshport; 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) == -1) 239 fatal("pipe: %s", strerror(errno)); 240 241 /* Create a socket pair for communicating with ssh. */ 242 if (pipe(pin) == -1) 243 fatal("pipe: %s", strerror(errno)); 244 if (pipe(pout) == -1) 245 fatal("pipe: %s", strerror(errno)); 246 247 /* Free the reserved descriptors. */ 248 close(reserved[0]); 249 close(reserved[1]); 250 251 ssh_signal(SIGTSTP, suspchild); 252 ssh_signal(SIGTTIN, suspchild); 253 ssh_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 (port != -1) { 268 addargs(&args, "-p"); 269 addargs(&args, "%d", port); 270 } 271 if (remuser != NULL) { 272 addargs(&args, "-l"); 273 addargs(&args, "%s", remuser); 274 } 275 addargs(&args, "--"); 276 addargs(&args, "%s", host); 277 addargs(&args, "%s", cmd); 278 279 execvp(ssh_program, args.list); 280 perror(ssh_program); 281 exit(1); 282 } else if (do_cmd_pid == -1) { 283 fatal("fork: %s", strerror(errno)); 284 } 285 /* Parent. Close the other side, and return the local side. */ 286 close(pin[0]); 287 *fdout = pin[1]; 288 close(pout[1]); 289 *fdin = pout[0]; 290 ssh_signal(SIGTERM, killchild); 291 ssh_signal(SIGINT, killchild); 292 ssh_signal(SIGHUP, killchild); 293 return 0; 294 } 295 296 /* 297 * This function executes a command similar to do_cmd(), but expects the 298 * input and output descriptors to be setup by a previous call to do_cmd(). 299 * This way the input and output of two commands can be connected. 300 */ 301 int 302 do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout) 303 { 304 pid_t pid; 305 int status; 306 307 if (verbose_mode) 308 fmprintf(stderr, 309 "Executing: 2nd program %s host %s, user %s, command %s\n", 310 ssh_program, host, 311 remuser ? remuser : "(unspecified)", cmd); 312 313 if (port == -1) 314 port = sshport; 315 316 /* Fork a child to execute the command on the remote host using ssh. */ 317 pid = fork(); 318 if (pid == 0) { 319 dup2(fdin, 0); 320 dup2(fdout, 1); 321 322 replacearg(&args, 0, "%s", ssh_program); 323 if (port != -1) { 324 addargs(&args, "-p"); 325 addargs(&args, "%d", port); 326 } 327 if (remuser != NULL) { 328 addargs(&args, "-l"); 329 addargs(&args, "%s", remuser); 330 } 331 addargs(&args, "-oBatchMode=yes"); 332 addargs(&args, "--"); 333 addargs(&args, "%s", host); 334 addargs(&args, "%s", cmd); 335 336 execvp(ssh_program, args.list); 337 perror(ssh_program); 338 exit(1); 339 } else if (pid == -1) { 340 fatal("fork: %s", strerror(errno)); 341 } 342 while (waitpid(pid, &status, 0) == -1) 343 if (errno != EINTR) 344 fatal("do_cmd2: waitpid: %s", strerror(errno)); 345 return 0; 346 } 347 348 typedef struct { 349 size_t cnt; 350 char *buf; 351 } BUF; 352 353 BUF *allocbuf(BUF *, int, int); 354 void lostconn(int); 355 int okname(char *); 356 void run_err(const char *,...) 357 __attribute__((__format__ (printf, 1, 2))) 358 __attribute__((__nonnull__ (1))); 359 int note_err(const char *,...) 360 __attribute__((__format__ (printf, 1, 2))); 361 void verifydir(char *); 362 363 struct passwd *pwd; 364 uid_t userid; 365 int errs, remin, remout; 366 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 367 368 #define CMDNEEDS 64 369 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 370 371 int response(void); 372 void rsource(char *, struct stat *); 373 void sink(int, char *[], const char *); 374 void source(int, char *[]); 375 void tolocal(int, char *[]); 376 void toremote(int, char *[]); 377 void usage(void); 378 379 int 380 main(int argc, char **argv) 381 { 382 int ch, fflag, tflag, status, n; 383 char **newargv; 384 const char *errstr; 385 extern char *optarg; 386 extern int optind; 387 388 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 389 sanitise_stdfd(); 390 391 setlocale(LC_CTYPE, ""); 392 393 /* Copy argv, because we modify it */ 394 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 395 for (n = 0; n < argc; n++) 396 newargv[n] = xstrdup(argv[n]); 397 argv = newargv; 398 399 memset(&args, '\0', sizeof(args)); 400 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 401 args.list = remote_remote_args.list = NULL; 402 addargs(&args, "%s", ssh_program); 403 addargs(&args, "-x"); 404 addargs(&args, "-oPermitLocalCommand=no"); 405 addargs(&args, "-oClearAllForwardings=yes"); 406 addargs(&args, "-oRemoteCommand=none"); 407 addargs(&args, "-oRequestTTY=no"); 408 409 fflag = Tflag = tflag = 0; 410 while ((ch = getopt(argc, argv, 411 "12346ABCTdfpqrtvF:J:P:S:c:i:l:o:")) != -1) { 412 switch (ch) { 413 /* User-visible flags. */ 414 case '1': 415 fatal("SSH protocol v.1 is no longer supported"); 416 break; 417 case '2': 418 /* Ignored */ 419 break; 420 case 'A': 421 case '4': 422 case '6': 423 case 'C': 424 addargs(&args, "-%c", ch); 425 addargs(&remote_remote_args, "-%c", ch); 426 break; 427 case '3': 428 throughlocal = 1; 429 break; 430 case 'o': 431 case 'c': 432 case 'i': 433 case 'F': 434 case 'J': 435 addargs(&remote_remote_args, "-%c", ch); 436 addargs(&remote_remote_args, "%s", optarg); 437 addargs(&args, "-%c", ch); 438 addargs(&args, "%s", optarg); 439 break; 440 case 'P': 441 sshport = a2port(optarg); 442 if (sshport <= 0) 443 fatal("bad port \"%s\"\n", optarg); 444 break; 445 case 'B': 446 addargs(&remote_remote_args, "-oBatchmode=yes"); 447 addargs(&args, "-oBatchmode=yes"); 448 break; 449 case 'l': 450 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 451 &errstr); 452 if (errstr != NULL) 453 usage(); 454 limit_kbps *= 1024; /* kbps */ 455 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 456 break; 457 case 'p': 458 pflag = 1; 459 break; 460 case 'r': 461 iamrecursive = 1; 462 break; 463 case 'S': 464 ssh_program = xstrdup(optarg); 465 break; 466 case 'v': 467 addargs(&args, "-v"); 468 addargs(&remote_remote_args, "-v"); 469 verbose_mode = 1; 470 break; 471 case 'q': 472 addargs(&args, "-q"); 473 addargs(&remote_remote_args, "-q"); 474 showprogress = 0; 475 break; 476 477 /* Server options. */ 478 case 'd': 479 targetshouldbedirectory = 1; 480 break; 481 case 'f': /* "from" */ 482 iamremote = 1; 483 fflag = 1; 484 break; 485 case 't': /* "to" */ 486 iamremote = 1; 487 tflag = 1; 488 break; 489 case 'T': 490 Tflag = 1; 491 break; 492 default: 493 usage(); 494 } 495 } 496 argc -= optind; 497 argv += optind; 498 499 /* Do this last because we want the user to be able to override it */ 500 addargs(&args, "-oForwardAgent=no"); 501 502 if ((pwd = getpwuid(userid = getuid())) == NULL) 503 fatal("unknown user %u", (u_int) userid); 504 505 if (!isatty(STDOUT_FILENO)) 506 showprogress = 0; 507 508 if (pflag) { 509 /* Cannot pledge: -p allows setuid/setgid files... */ 510 } else { 511 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 512 NULL) == -1) { 513 perror("pledge"); 514 exit(1); 515 } 516 } 517 518 remin = STDIN_FILENO; 519 remout = STDOUT_FILENO; 520 521 if (fflag) { 522 /* Follow "protocol", send data. */ 523 (void) response(); 524 source(argc, argv); 525 exit(errs != 0); 526 } 527 if (tflag) { 528 /* Receive data. */ 529 sink(argc, argv, NULL); 530 exit(errs != 0); 531 } 532 if (argc < 2) 533 usage(); 534 if (argc > 2) 535 targetshouldbedirectory = 1; 536 537 remin = remout = -1; 538 do_cmd_pid = -1; 539 /* Command to be executed on remote system using "ssh". */ 540 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 541 verbose_mode ? " -v" : "", 542 iamrecursive ? " -r" : "", pflag ? " -p" : "", 543 targetshouldbedirectory ? " -d" : ""); 544 545 (void) ssh_signal(SIGPIPE, lostconn); 546 547 if (colon(argv[argc - 1])) /* Dest is remote host. */ 548 toremote(argc, argv); 549 else { 550 if (targetshouldbedirectory) 551 verifydir(argv[argc - 1]); 552 tolocal(argc, argv); /* Dest is local host. */ 553 } 554 /* 555 * Finally check the exit status of the ssh process, if one was forked 556 * and no error has occurred yet 557 */ 558 if (do_cmd_pid != -1 && errs == 0) { 559 if (remin != -1) 560 (void) close(remin); 561 if (remout != -1) 562 (void) close(remout); 563 if (waitpid(do_cmd_pid, &status, 0) == -1) 564 errs = 1; 565 else { 566 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 567 errs = 1; 568 } 569 } 570 exit(errs != 0); 571 } 572 573 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 574 static int 575 scpio(void *_cnt, size_t s) 576 { 577 off_t *cnt = (off_t *)_cnt; 578 579 *cnt += s; 580 refresh_progress_meter(0); 581 if (limit_kbps > 0) 582 bandwidth_limit(&bwlimit, s); 583 return 0; 584 } 585 586 static int 587 do_times(int fd, int verb, const struct stat *sb) 588 { 589 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 590 char buf[(20 + 7 + 2) * 2 + 2]; 591 592 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 593 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 594 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 595 if (verb) { 596 fprintf(stderr, "File mtime %lld atime %lld\n", 597 (long long)sb->st_mtime, (long long)sb->st_atime); 598 fprintf(stderr, "Sending file timestamps: %s", buf); 599 } 600 (void) atomicio(vwrite, fd, buf, strlen(buf)); 601 return (response()); 602 } 603 604 static int 605 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 606 char **pathp) 607 { 608 int r; 609 610 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 611 if (r == 0 && *pathp == NULL) 612 *pathp = xstrdup("."); 613 return r; 614 } 615 616 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 617 static int 618 append(char *cp, char ***ap, size_t *np) 619 { 620 char **tmp; 621 622 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 623 return -1; 624 tmp[(*np)] = cp; 625 (*np)++; 626 *ap = tmp; 627 return 0; 628 } 629 630 /* 631 * Finds the start and end of the first brace pair in the pattern. 632 * returns 0 on success or -1 for invalid patterns. 633 */ 634 static int 635 find_brace(const char *pattern, int *startp, int *endp) 636 { 637 int i; 638 int in_bracket, brace_level; 639 640 *startp = *endp = -1; 641 in_bracket = brace_level = 0; 642 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 643 switch (pattern[i]) { 644 case '\\': 645 /* skip next character */ 646 if (pattern[i + 1] != '\0') 647 i++; 648 break; 649 case '[': 650 in_bracket = 1; 651 break; 652 case ']': 653 in_bracket = 0; 654 break; 655 case '{': 656 if (in_bracket) 657 break; 658 if (pattern[i + 1] == '}') { 659 /* Protect a single {}, for find(1), like csh */ 660 i++; /* skip */ 661 break; 662 } 663 if (*startp == -1) 664 *startp = i; 665 brace_level++; 666 break; 667 case '}': 668 if (in_bracket) 669 break; 670 if (*startp < 0) { 671 /* Unbalanced brace */ 672 return -1; 673 } 674 if (--brace_level <= 0) 675 *endp = i; 676 break; 677 } 678 } 679 /* unbalanced brackets/braces */ 680 if (*endp < 0 && (*startp >= 0 || in_bracket)) 681 return -1; 682 return 0; 683 } 684 685 /* 686 * Assembles and records a successfully-expanded pattern, returns -1 on 687 * alloc failure. 688 */ 689 static int 690 emit_expansion(const char *pattern, int brace_start, int brace_end, 691 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 692 { 693 char *cp; 694 int o = 0, tail_len = strlen(pattern + brace_end + 1); 695 696 if ((cp = malloc(brace_start + (sel_end - sel_start) + 697 tail_len + 1)) == NULL) 698 return -1; 699 700 /* Pattern before initial brace */ 701 if (brace_start > 0) { 702 memcpy(cp, pattern, brace_start); 703 o = brace_start; 704 } 705 /* Current braced selection */ 706 if (sel_end - sel_start > 0) { 707 memcpy(cp + o, pattern + sel_start, 708 sel_end - sel_start); 709 o += sel_end - sel_start; 710 } 711 /* Remainder of pattern after closing brace */ 712 if (tail_len > 0) { 713 memcpy(cp + o, pattern + brace_end + 1, tail_len); 714 o += tail_len; 715 } 716 cp[o] = '\0'; 717 if (append(cp, patternsp, npatternsp) != 0) { 718 free(cp); 719 return -1; 720 } 721 return 0; 722 } 723 724 /* 725 * Expand the first encountered brace in pattern, appending the expanded 726 * patterns it yielded to the *patternsp array. 727 * 728 * Returns 0 on success or -1 on allocation failure. 729 * 730 * Signals whether expansion was performed via *expanded and whether 731 * pattern was invalid via *invalid. 732 */ 733 static int 734 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 735 int *expanded, int *invalid) 736 { 737 int i; 738 int in_bracket, brace_start, brace_end, brace_level; 739 int sel_start, sel_end; 740 741 *invalid = *expanded = 0; 742 743 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 744 *invalid = 1; 745 return 0; 746 } else if (brace_start == -1) 747 return 0; 748 749 in_bracket = brace_level = 0; 750 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 751 switch (pattern[i]) { 752 case '{': 753 if (in_bracket) 754 break; 755 brace_level++; 756 break; 757 case '}': 758 if (in_bracket) 759 break; 760 brace_level--; 761 break; 762 case '[': 763 in_bracket = 1; 764 break; 765 case ']': 766 in_bracket = 0; 767 break; 768 case '\\': 769 if (i < brace_end - 1) 770 i++; /* skip */ 771 break; 772 } 773 if (pattern[i] == ',' || i == brace_end - 1) { 774 if (in_bracket || brace_level > 0) 775 continue; 776 /* End of a selection, emit an expanded pattern */ 777 778 /* Adjust end index for last selection */ 779 sel_end = (i == brace_end - 1) ? brace_end : i; 780 if (emit_expansion(pattern, brace_start, brace_end, 781 sel_start, sel_end, patternsp, npatternsp) != 0) 782 return -1; 783 /* move on to the next selection */ 784 sel_start = i + 1; 785 continue; 786 } 787 } 788 if (in_bracket || brace_level > 0) { 789 *invalid = 1; 790 return 0; 791 } 792 /* success */ 793 *expanded = 1; 794 return 0; 795 } 796 797 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 798 static int 799 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 800 { 801 char *cp, *cp2, **active = NULL, **done = NULL; 802 size_t i, nactive = 0, ndone = 0; 803 int ret = -1, invalid = 0, expanded = 0; 804 805 *patternsp = NULL; 806 *npatternsp = 0; 807 808 /* Start the worklist with the original pattern */ 809 if ((cp = strdup(pattern)) == NULL) 810 return -1; 811 if (append(cp, &active, &nactive) != 0) { 812 free(cp); 813 return -1; 814 } 815 while (nactive > 0) { 816 cp = active[nactive - 1]; 817 nactive--; 818 if (brace_expand_one(cp, &active, &nactive, 819 &expanded, &invalid) == -1) { 820 free(cp); 821 goto fail; 822 } 823 if (invalid) 824 fatal_f("invalid brace pattern \"%s\"", cp); 825 if (expanded) { 826 /* 827 * Current entry expanded to new entries on the 828 * active list; discard the progenitor pattern. 829 */ 830 free(cp); 831 continue; 832 } 833 /* 834 * Pattern did not expand; append the finename component to 835 * the completed list 836 */ 837 if ((cp2 = strrchr(cp, '/')) != NULL) 838 *cp2++ = '\0'; 839 else 840 cp2 = cp; 841 if (append(xstrdup(cp2), &done, &ndone) != 0) { 842 free(cp); 843 goto fail; 844 } 845 free(cp); 846 } 847 /* success */ 848 *patternsp = done; 849 *npatternsp = ndone; 850 done = NULL; 851 ndone = 0; 852 ret = 0; 853 fail: 854 for (i = 0; i < nactive; i++) 855 free(active[i]); 856 free(active); 857 for (i = 0; i < ndone; i++) 858 free(done[i]); 859 free(done); 860 return ret; 861 } 862 863 void 864 toremote(int argc, char **argv) 865 { 866 char *suser = NULL, *host = NULL, *src = NULL; 867 char *bp, *tuser, *thost, *targ; 868 int sport = -1, tport = -1; 869 arglist alist; 870 int i, r; 871 u_int j; 872 873 memset(&alist, '\0', sizeof(alist)); 874 alist.list = NULL; 875 876 /* Parse target */ 877 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 878 if (r == -1) { 879 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 880 ++errs; 881 goto out; 882 } 883 if (r != 0) { 884 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 885 &targ) == -1) { 886 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 887 ++errs; 888 goto out; 889 } 890 } 891 if (tuser != NULL && !okname(tuser)) { 892 ++errs; 893 goto out; 894 } 895 896 /* Parse source files */ 897 for (i = 0; i < argc - 1; i++) { 898 free(suser); 899 free(host); 900 free(src); 901 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 902 if (r == -1) { 903 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 904 ++errs; 905 continue; 906 } 907 if (r != 0) { 908 parse_user_host_path(argv[i], &suser, &host, &src); 909 } 910 if (suser != NULL && !okname(suser)) { 911 ++errs; 912 continue; 913 } 914 if (host && throughlocal) { /* extended remote to remote */ 915 xasprintf(&bp, "%s -f %s%s", cmd, 916 *src == '-' ? "-- " : "", src); 917 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) 918 exit(1); 919 free(bp); 920 xasprintf(&bp, "%s -t %s%s", cmd, 921 *targ == '-' ? "-- " : "", targ); 922 if (do_cmd2(thost, tuser, tport, bp, remin, remout) < 0) 923 exit(1); 924 free(bp); 925 (void) close(remin); 926 (void) close(remout); 927 remin = remout = -1; 928 } else if (host) { /* standard remote to remote */ 929 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 930 /* This would require the remote support URIs */ 931 fatal("target port not supported with two " 932 "remote hosts without the -3 option"); 933 } 934 935 freeargs(&alist); 936 addargs(&alist, "%s", ssh_program); 937 addargs(&alist, "-x"); 938 addargs(&alist, "-oClearAllForwardings=yes"); 939 addargs(&alist, "-n"); 940 for (j = 0; j < remote_remote_args.num; j++) { 941 addargs(&alist, "%s", 942 remote_remote_args.list[j]); 943 } 944 945 if (sport != -1) { 946 addargs(&alist, "-p"); 947 addargs(&alist, "%d", sport); 948 } 949 if (suser) { 950 addargs(&alist, "-l"); 951 addargs(&alist, "%s", suser); 952 } 953 addargs(&alist, "--"); 954 addargs(&alist, "%s", host); 955 addargs(&alist, "%s", cmd); 956 addargs(&alist, "%s", src); 957 addargs(&alist, "%s%s%s:%s", 958 tuser ? tuser : "", tuser ? "@" : "", 959 thost, targ); 960 if (do_local_cmd(&alist) != 0) 961 errs = 1; 962 } else { /* local to remote */ 963 if (remin == -1) { 964 xasprintf(&bp, "%s -t %s%s", cmd, 965 *targ == '-' ? "-- " : "", targ); 966 if (do_cmd(thost, tuser, tport, bp, &remin, 967 &remout) < 0) 968 exit(1); 969 if (response() < 0) 970 exit(1); 971 free(bp); 972 } 973 source(1, argv + i); 974 } 975 } 976 out: 977 free(tuser); 978 free(thost); 979 free(targ); 980 free(suser); 981 free(host); 982 free(src); 983 } 984 985 void 986 tolocal(int argc, char **argv) 987 { 988 char *bp, *host = NULL, *src = NULL, *suser = NULL; 989 arglist alist; 990 int i, r, sport = -1; 991 992 memset(&alist, '\0', sizeof(alist)); 993 alist.list = NULL; 994 995 for (i = 0; i < argc - 1; i++) { 996 free(suser); 997 free(host); 998 free(src); 999 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1000 if (r == -1) { 1001 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1002 ++errs; 1003 continue; 1004 } 1005 if (r != 0) 1006 parse_user_host_path(argv[i], &suser, &host, &src); 1007 if (suser != NULL && !okname(suser)) { 1008 ++errs; 1009 continue; 1010 } 1011 if (!host) { /* Local to local. */ 1012 freeargs(&alist); 1013 addargs(&alist, "%s", _PATH_CP); 1014 if (iamrecursive) 1015 addargs(&alist, "-r"); 1016 if (pflag) 1017 addargs(&alist, "-p"); 1018 addargs(&alist, "--"); 1019 addargs(&alist, "%s", argv[i]); 1020 addargs(&alist, "%s", argv[argc-1]); 1021 if (do_local_cmd(&alist)) 1022 ++errs; 1023 continue; 1024 } 1025 /* Remote to local. */ 1026 xasprintf(&bp, "%s -f %s%s", 1027 cmd, *src == '-' ? "-- " : "", src); 1028 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) { 1029 free(bp); 1030 ++errs; 1031 continue; 1032 } 1033 free(bp); 1034 sink(1, argv + argc - 1, src); 1035 (void) close(remin); 1036 remin = remout = -1; 1037 } 1038 free(suser); 1039 free(host); 1040 free(src); 1041 } 1042 1043 void 1044 source(int argc, char **argv) 1045 { 1046 struct stat stb; 1047 static BUF buffer; 1048 BUF *bp; 1049 off_t i, statbytes; 1050 size_t amt, nr; 1051 int fd = -1, haderr, indx; 1052 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1053 int len; 1054 1055 for (indx = 0; indx < argc; ++indx) { 1056 name = argv[indx]; 1057 statbytes = 0; 1058 len = strlen(name); 1059 while (len > 1 && name[len-1] == '/') 1060 name[--len] = '\0'; 1061 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) == -1) 1062 goto syserr; 1063 if (strchr(name, '\n') != NULL) { 1064 strnvis(encname, name, sizeof(encname), VIS_NL); 1065 name = encname; 1066 } 1067 if (fstat(fd, &stb) == -1) { 1068 syserr: run_err("%s: %s", name, strerror(errno)); 1069 goto next; 1070 } 1071 if (stb.st_size < 0) { 1072 run_err("%s: %s", name, "Negative file size"); 1073 goto next; 1074 } 1075 unset_nonblock(fd); 1076 switch (stb.st_mode & S_IFMT) { 1077 case S_IFREG: 1078 break; 1079 case S_IFDIR: 1080 if (iamrecursive) { 1081 rsource(name, &stb); 1082 goto next; 1083 } 1084 /* FALLTHROUGH */ 1085 default: 1086 run_err("%s: not a regular file", name); 1087 goto next; 1088 } 1089 if ((last = strrchr(name, '/')) == NULL) 1090 last = name; 1091 else 1092 ++last; 1093 curfile = last; 1094 if (pflag) { 1095 if (do_times(remout, verbose_mode, &stb) < 0) 1096 goto next; 1097 } 1098 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1099 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1100 (u_int) (stb.st_mode & FILEMODEMASK), 1101 (long long)stb.st_size, last); 1102 if (verbose_mode) 1103 fmprintf(stderr, "Sending file modes: %s", buf); 1104 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1105 if (response() < 0) 1106 goto next; 1107 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1108 next: if (fd != -1) { 1109 (void) close(fd); 1110 fd = -1; 1111 } 1112 continue; 1113 } 1114 if (showprogress) 1115 start_progress_meter(curfile, stb.st_size, &statbytes); 1116 set_nonblock(remout); 1117 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1118 amt = bp->cnt; 1119 if (i + (off_t)amt > stb.st_size) 1120 amt = stb.st_size - i; 1121 if (!haderr) { 1122 if ((nr = atomicio(read, fd, 1123 bp->buf, amt)) != amt) { 1124 haderr = errno; 1125 memset(bp->buf + nr, 0, amt - nr); 1126 } 1127 } 1128 /* Keep writing after error to retain sync */ 1129 if (haderr) { 1130 (void)atomicio(vwrite, remout, bp->buf, amt); 1131 memset(bp->buf, 0, amt); 1132 continue; 1133 } 1134 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1135 &statbytes) != amt) 1136 haderr = errno; 1137 } 1138 unset_nonblock(remout); 1139 1140 if (fd != -1) { 1141 if (close(fd) == -1 && !haderr) 1142 haderr = errno; 1143 fd = -1; 1144 } 1145 if (!haderr) 1146 (void) atomicio(vwrite, remout, "", 1); 1147 else 1148 run_err("%s: %s", name, strerror(haderr)); 1149 (void) response(); 1150 if (showprogress) 1151 stop_progress_meter(); 1152 } 1153 } 1154 1155 void 1156 rsource(char *name, struct stat *statp) 1157 { 1158 DIR *dirp; 1159 struct dirent *dp; 1160 char *last, *vect[1], path[PATH_MAX]; 1161 1162 if (!(dirp = opendir(name))) { 1163 run_err("%s: %s", name, strerror(errno)); 1164 return; 1165 } 1166 last = strrchr(name, '/'); 1167 if (last == NULL) 1168 last = name; 1169 else 1170 last++; 1171 if (pflag) { 1172 if (do_times(remout, verbose_mode, statp) < 0) { 1173 closedir(dirp); 1174 return; 1175 } 1176 } 1177 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1178 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1179 if (verbose_mode) 1180 fmprintf(stderr, "Entering directory: %s", path); 1181 (void) atomicio(vwrite, remout, path, strlen(path)); 1182 if (response() < 0) { 1183 closedir(dirp); 1184 return; 1185 } 1186 while ((dp = readdir(dirp)) != NULL) { 1187 if (dp->d_ino == 0) 1188 continue; 1189 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1190 continue; 1191 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 1192 run_err("%s/%s: name too long", name, dp->d_name); 1193 continue; 1194 } 1195 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 1196 vect[0] = path; 1197 source(1, vect); 1198 } 1199 (void) closedir(dirp); 1200 (void) atomicio(vwrite, remout, "E\n", 2); 1201 (void) response(); 1202 } 1203 1204 #define TYPE_OVERFLOW(type, val) \ 1205 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1206 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1207 (sizeof(type) != 4 && sizeof(type) != 8)) 1208 1209 void 1210 sink(int argc, char **argv, const char *src) 1211 { 1212 static BUF buffer; 1213 struct stat stb; 1214 BUF *bp; 1215 off_t i; 1216 size_t j, count; 1217 int amt, exists, first, ofd; 1218 mode_t mode, omode, mask; 1219 off_t size, statbytes; 1220 unsigned long long ull; 1221 int setimes, targisdir, wrerr; 1222 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 1223 char **patterns = NULL; 1224 size_t n, npatterns = 0; 1225 struct timeval tv[2]; 1226 1227 #define atime tv[0] 1228 #define mtime tv[1] 1229 #define SCREWUP(str) { why = str; goto screwup; } 1230 1231 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1232 SCREWUP("Unexpected off_t/time_t size"); 1233 1234 setimes = targisdir = 0; 1235 mask = umask(0); 1236 if (!pflag) 1237 (void) umask(mask); 1238 if (argc != 1) { 1239 run_err("ambiguous target"); 1240 exit(1); 1241 } 1242 targ = *argv; 1243 if (targetshouldbedirectory) 1244 verifydir(targ); 1245 1246 (void) atomicio(vwrite, remout, "", 1); 1247 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1248 targisdir = 1; 1249 if (src != NULL && !iamrecursive && !Tflag) { 1250 /* 1251 * Prepare to try to restrict incoming filenames to match 1252 * the requested destination file glob. 1253 */ 1254 if (brace_expand(src, &patterns, &npatterns) != 0) 1255 fatal_f("could not expand pattern"); 1256 } 1257 for (first = 1;; first = 0) { 1258 cp = buf; 1259 if (atomicio(read, remin, cp, 1) != 1) 1260 goto done; 1261 if (*cp++ == '\n') 1262 SCREWUP("unexpected <newline>"); 1263 do { 1264 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1265 SCREWUP("lost connection"); 1266 *cp++ = ch; 1267 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1268 *cp = 0; 1269 if (verbose_mode) 1270 fmprintf(stderr, "Sink: %s", buf); 1271 1272 if (buf[0] == '\01' || buf[0] == '\02') { 1273 if (iamremote == 0) { 1274 (void) snmprintf(visbuf, sizeof(visbuf), 1275 NULL, "%s", buf + 1); 1276 (void) atomicio(vwrite, STDERR_FILENO, 1277 visbuf, strlen(visbuf)); 1278 } 1279 if (buf[0] == '\02') 1280 exit(1); 1281 ++errs; 1282 continue; 1283 } 1284 if (buf[0] == 'E') { 1285 (void) atomicio(vwrite, remout, "", 1); 1286 goto done; 1287 } 1288 if (ch == '\n') 1289 *--cp = 0; 1290 1291 cp = buf; 1292 if (*cp == 'T') { 1293 setimes++; 1294 cp++; 1295 if (!isdigit((unsigned char)*cp)) 1296 SCREWUP("mtime.sec not present"); 1297 ull = strtoull(cp, &cp, 10); 1298 if (!cp || *cp++ != ' ') 1299 SCREWUP("mtime.sec not delimited"); 1300 if (TYPE_OVERFLOW(time_t, ull)) 1301 setimes = 0; /* out of range */ 1302 mtime.tv_sec = ull; 1303 mtime.tv_usec = strtol(cp, &cp, 10); 1304 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1305 mtime.tv_usec > 999999) 1306 SCREWUP("mtime.usec not delimited"); 1307 if (!isdigit((unsigned char)*cp)) 1308 SCREWUP("atime.sec not present"); 1309 ull = strtoull(cp, &cp, 10); 1310 if (!cp || *cp++ != ' ') 1311 SCREWUP("atime.sec not delimited"); 1312 if (TYPE_OVERFLOW(time_t, ull)) 1313 setimes = 0; /* out of range */ 1314 atime.tv_sec = ull; 1315 atime.tv_usec = strtol(cp, &cp, 10); 1316 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1317 atime.tv_usec > 999999) 1318 SCREWUP("atime.usec not delimited"); 1319 (void) atomicio(vwrite, remout, "", 1); 1320 continue; 1321 } 1322 if (*cp != 'C' && *cp != 'D') { 1323 /* 1324 * Check for the case "rcp remote:foo\* local:bar". 1325 * In this case, the line "No match." can be returned 1326 * by the shell before the rcp command on the remote is 1327 * executed so the ^Aerror_message convention isn't 1328 * followed. 1329 */ 1330 if (first) { 1331 run_err("%s", cp); 1332 exit(1); 1333 } 1334 SCREWUP("expected control record"); 1335 } 1336 mode = 0; 1337 for (++cp; cp < buf + 5; cp++) { 1338 if (*cp < '0' || *cp > '7') 1339 SCREWUP("bad mode"); 1340 mode = (mode << 3) | (*cp - '0'); 1341 } 1342 if (!pflag) 1343 mode &= ~mask; 1344 if (*cp++ != ' ') 1345 SCREWUP("mode not delimited"); 1346 1347 if (!isdigit((unsigned char)*cp)) 1348 SCREWUP("size not present"); 1349 ull = strtoull(cp, &cp, 10); 1350 if (!cp || *cp++ != ' ') 1351 SCREWUP("size not delimited"); 1352 if (TYPE_OVERFLOW(off_t, ull)) 1353 SCREWUP("size out of range"); 1354 size = (off_t)ull; 1355 1356 if (*cp == '\0' || strchr(cp, '/') != NULL || 1357 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1358 run_err("error: unexpected filename: %s", cp); 1359 exit(1); 1360 } 1361 if (npatterns > 0) { 1362 for (n = 0; n < npatterns; n++) { 1363 if (fnmatch(patterns[n], cp, 0) == 0) 1364 break; 1365 } 1366 if (n >= npatterns) 1367 SCREWUP("filename does not match request"); 1368 } 1369 if (targisdir) { 1370 static char *namebuf; 1371 static size_t cursize; 1372 size_t need; 1373 1374 need = strlen(targ) + strlen(cp) + 250; 1375 if (need > cursize) { 1376 free(namebuf); 1377 namebuf = xmalloc(need); 1378 cursize = need; 1379 } 1380 (void) snprintf(namebuf, need, "%s%s%s", targ, 1381 strcmp(targ, "/") ? "/" : "", cp); 1382 np = namebuf; 1383 } else 1384 np = targ; 1385 curfile = cp; 1386 exists = stat(np, &stb) == 0; 1387 if (buf[0] == 'D') { 1388 int mod_flag = pflag; 1389 if (!iamrecursive) 1390 SCREWUP("received directory without -r"); 1391 if (exists) { 1392 if (!S_ISDIR(stb.st_mode)) { 1393 errno = ENOTDIR; 1394 goto bad; 1395 } 1396 if (pflag) 1397 (void) chmod(np, mode); 1398 } else { 1399 /* Handle copying from a read-only 1400 directory */ 1401 mod_flag = 1; 1402 if (mkdir(np, mode | S_IRWXU) == -1) 1403 goto bad; 1404 } 1405 vect[0] = xstrdup(np); 1406 sink(1, vect, src); 1407 if (setimes) { 1408 setimes = 0; 1409 (void) utimes(vect[0], tv); 1410 } 1411 if (mod_flag) 1412 (void) chmod(vect[0], mode); 1413 free(vect[0]); 1414 continue; 1415 } 1416 omode = mode; 1417 mode |= S_IWUSR; 1418 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1419 bad: run_err("%s: %s", np, strerror(errno)); 1420 continue; 1421 } 1422 (void) atomicio(vwrite, remout, "", 1); 1423 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1424 (void) close(ofd); 1425 continue; 1426 } 1427 cp = bp->buf; 1428 wrerr = 0; 1429 1430 /* 1431 * NB. do not use run_err() unless immediately followed by 1432 * exit() below as it may send a spurious reply that might 1433 * desyncronise us from the peer. Use note_err() instead. 1434 */ 1435 statbytes = 0; 1436 if (showprogress) 1437 start_progress_meter(curfile, size, &statbytes); 1438 set_nonblock(remin); 1439 for (count = i = 0; i < size; i += bp->cnt) { 1440 amt = bp->cnt; 1441 if (i + amt > size) 1442 amt = size - i; 1443 count += amt; 1444 do { 1445 j = atomicio6(read, remin, cp, amt, 1446 scpio, &statbytes); 1447 if (j == 0) { 1448 run_err("%s", j != EPIPE ? 1449 strerror(errno) : 1450 "dropped connection"); 1451 exit(1); 1452 } 1453 amt -= j; 1454 cp += j; 1455 } while (amt > 0); 1456 1457 if (count == bp->cnt) { 1458 /* Keep reading so we stay sync'd up. */ 1459 if (!wrerr) { 1460 if (atomicio(vwrite, ofd, bp->buf, 1461 count) != count) { 1462 note_err("%s: %s", np, 1463 strerror(errno)); 1464 wrerr = 1; 1465 } 1466 } 1467 count = 0; 1468 cp = bp->buf; 1469 } 1470 } 1471 unset_nonblock(remin); 1472 if (count != 0 && !wrerr && 1473 atomicio(vwrite, ofd, bp->buf, count) != count) { 1474 note_err("%s: %s", np, strerror(errno)); 1475 wrerr = 1; 1476 } 1477 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1478 ftruncate(ofd, size) != 0) 1479 note_err("%s: truncate: %s", np, strerror(errno)); 1480 if (pflag) { 1481 if (exists || omode != mode) 1482 if (fchmod(ofd, omode)) { 1483 note_err("%s: set mode: %s", 1484 np, strerror(errno)); 1485 } 1486 } else { 1487 if (!exists && omode != mode) 1488 if (fchmod(ofd, omode & ~mask)) { 1489 note_err("%s: set mode: %s", 1490 np, strerror(errno)); 1491 } 1492 } 1493 if (close(ofd) == -1) 1494 note_err("%s: close: %s", np, strerror(errno)); 1495 (void) response(); 1496 if (showprogress) 1497 stop_progress_meter(); 1498 if (setimes && !wrerr) { 1499 setimes = 0; 1500 if (utimes(np, tv) == -1) { 1501 note_err("%s: set times: %s", 1502 np, strerror(errno)); 1503 } 1504 } 1505 /* If no error was noted then signal success for this file */ 1506 if (note_err(NULL) == 0) 1507 (void) atomicio(vwrite, remout, "", 1); 1508 } 1509 done: 1510 for (n = 0; n < npatterns; n++) 1511 free(patterns[n]); 1512 free(patterns); 1513 return; 1514 screwup: 1515 for (n = 0; n < npatterns; n++) 1516 free(patterns[n]); 1517 free(patterns); 1518 run_err("protocol error: %s", why); 1519 exit(1); 1520 } 1521 1522 int 1523 response(void) 1524 { 1525 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1526 1527 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1528 lostconn(0); 1529 1530 cp = rbuf; 1531 switch (resp) { 1532 case 0: /* ok */ 1533 return (0); 1534 default: 1535 *cp++ = resp; 1536 /* FALLTHROUGH */ 1537 case 1: /* error, followed by error msg */ 1538 case 2: /* fatal error, "" */ 1539 do { 1540 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1541 lostconn(0); 1542 *cp++ = ch; 1543 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1544 1545 if (!iamremote) { 1546 cp[-1] = '\0'; 1547 (void) snmprintf(visbuf, sizeof(visbuf), 1548 NULL, "%s\n", rbuf); 1549 (void) atomicio(vwrite, STDERR_FILENO, 1550 visbuf, strlen(visbuf)); 1551 } 1552 ++errs; 1553 if (resp == 1) 1554 return (-1); 1555 exit(1); 1556 } 1557 /* NOTREACHED */ 1558 } 1559 1560 void 1561 usage(void) 1562 { 1563 (void) fprintf(stderr, 1564 "usage: scp [-346ABCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1565 " [-J destination] [-l limit] [-o ssh_option] [-P port]\n" 1566 " [-S program] source ... target\n"); 1567 exit(1); 1568 } 1569 1570 void 1571 run_err(const char *fmt,...) 1572 { 1573 static FILE *fp; 1574 va_list ap; 1575 1576 ++errs; 1577 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1578 (void) fprintf(fp, "%c", 0x01); 1579 (void) fprintf(fp, "scp: "); 1580 va_start(ap, fmt); 1581 (void) vfprintf(fp, fmt, ap); 1582 va_end(ap); 1583 (void) fprintf(fp, "\n"); 1584 (void) fflush(fp); 1585 } 1586 1587 if (!iamremote) { 1588 va_start(ap, fmt); 1589 vfmprintf(stderr, fmt, ap); 1590 va_end(ap); 1591 fprintf(stderr, "\n"); 1592 } 1593 } 1594 1595 /* 1596 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 1597 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 1598 * any active error at the end of the transfer. 1599 */ 1600 int 1601 note_err(const char *fmt, ...) 1602 { 1603 static char *emsg; 1604 va_list ap; 1605 1606 /* Replay any previously-noted error */ 1607 if (fmt == NULL) { 1608 if (emsg == NULL) 1609 return 0; 1610 run_err("%s", emsg); 1611 free(emsg); 1612 emsg = NULL; 1613 return -1; 1614 } 1615 1616 errs++; 1617 /* Prefer first-noted error */ 1618 if (emsg != NULL) 1619 return -1; 1620 1621 va_start(ap, fmt); 1622 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 1623 va_end(ap); 1624 return -1; 1625 } 1626 1627 void 1628 verifydir(char *cp) 1629 { 1630 struct stat stb; 1631 1632 if (!stat(cp, &stb)) { 1633 if (S_ISDIR(stb.st_mode)) 1634 return; 1635 errno = ENOTDIR; 1636 } 1637 run_err("%s: %s", cp, strerror(errno)); 1638 killchild(0); 1639 } 1640 1641 int 1642 okname(char *cp0) 1643 { 1644 int c; 1645 char *cp; 1646 1647 cp = cp0; 1648 do { 1649 c = (int)*cp; 1650 if (c & 0200) 1651 goto bad; 1652 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1653 switch (c) { 1654 case '\'': 1655 case '"': 1656 case '`': 1657 case ' ': 1658 case '#': 1659 goto bad; 1660 default: 1661 break; 1662 } 1663 } 1664 } while (*++cp); 1665 return (1); 1666 1667 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1668 return (0); 1669 } 1670 1671 BUF * 1672 allocbuf(BUF *bp, int fd, int blksize) 1673 { 1674 size_t size; 1675 struct stat stb; 1676 1677 if (fstat(fd, &stb) == -1) { 1678 run_err("fstat: %s", strerror(errno)); 1679 return (0); 1680 } 1681 size = ROUNDUP(stb.st_blksize, blksize); 1682 if (size == 0) 1683 size = blksize; 1684 if (bp->cnt >= size) 1685 return (bp); 1686 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 1687 bp->cnt = size; 1688 return (bp); 1689 } 1690 1691 void 1692 lostconn(int signo) 1693 { 1694 if (!iamremote) 1695 (void)write(STDERR_FILENO, "lost connection\n", 16); 1696 if (signo) 1697 _exit(1); 1698 else 1699 exit(1); 1700 } 1701