1 /* $OpenBSD: scp.c,v 1.211 2020/05/29 21:22:02 millert 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, "-oForwardAgent=no"); 405 addargs(&args, "-oPermitLocalCommand=no"); 406 addargs(&args, "-oClearAllForwardings=yes"); 407 addargs(&args, "-oRemoteCommand=none"); 408 addargs(&args, "-oRequestTTY=no"); 409 410 fflag = Tflag = tflag = 0; 411 while ((ch = getopt(argc, argv, 412 "dfl:prtTvBCc:i:P:q12346S:o:F:J:")) != -1) { 413 switch (ch) { 414 /* User-visible flags. */ 415 case '1': 416 fatal("SSH protocol v.1 is no longer supported"); 417 break; 418 case '2': 419 /* Ignored */ 420 break; 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 if ((pwd = getpwuid(userid = getuid())) == NULL) 500 fatal("unknown user %u", (u_int) userid); 501 502 if (!isatty(STDOUT_FILENO)) 503 showprogress = 0; 504 505 if (pflag) { 506 /* Cannot pledge: -p allows setuid/setgid files... */ 507 } else { 508 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 509 NULL) == -1) { 510 perror("pledge"); 511 exit(1); 512 } 513 } 514 515 remin = STDIN_FILENO; 516 remout = STDOUT_FILENO; 517 518 if (fflag) { 519 /* Follow "protocol", send data. */ 520 (void) response(); 521 source(argc, argv); 522 exit(errs != 0); 523 } 524 if (tflag) { 525 /* Receive data. */ 526 sink(argc, argv, NULL); 527 exit(errs != 0); 528 } 529 if (argc < 2) 530 usage(); 531 if (argc > 2) 532 targetshouldbedirectory = 1; 533 534 remin = remout = -1; 535 do_cmd_pid = -1; 536 /* Command to be executed on remote system using "ssh". */ 537 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 538 verbose_mode ? " -v" : "", 539 iamrecursive ? " -r" : "", pflag ? " -p" : "", 540 targetshouldbedirectory ? " -d" : ""); 541 542 (void) ssh_signal(SIGPIPE, lostconn); 543 544 if (colon(argv[argc - 1])) /* Dest is remote host. */ 545 toremote(argc, argv); 546 else { 547 if (targetshouldbedirectory) 548 verifydir(argv[argc - 1]); 549 tolocal(argc, argv); /* Dest is local host. */ 550 } 551 /* 552 * Finally check the exit status of the ssh process, if one was forked 553 * and no error has occurred yet 554 */ 555 if (do_cmd_pid != -1 && errs == 0) { 556 if (remin != -1) 557 (void) close(remin); 558 if (remout != -1) 559 (void) close(remout); 560 if (waitpid(do_cmd_pid, &status, 0) == -1) 561 errs = 1; 562 else { 563 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 564 errs = 1; 565 } 566 } 567 exit(errs != 0); 568 } 569 570 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 571 static int 572 scpio(void *_cnt, size_t s) 573 { 574 off_t *cnt = (off_t *)_cnt; 575 576 *cnt += s; 577 refresh_progress_meter(0); 578 if (limit_kbps > 0) 579 bandwidth_limit(&bwlimit, s); 580 return 0; 581 } 582 583 static int 584 do_times(int fd, int verb, const struct stat *sb) 585 { 586 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 587 char buf[(20 + 7 + 2) * 2 + 2]; 588 589 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 590 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 591 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 592 if (verb) { 593 fprintf(stderr, "File mtime %lld atime %lld\n", 594 (long long)sb->st_mtime, (long long)sb->st_atime); 595 fprintf(stderr, "Sending file timestamps: %s", buf); 596 } 597 (void) atomicio(vwrite, fd, buf, strlen(buf)); 598 return (response()); 599 } 600 601 static int 602 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 603 char **pathp) 604 { 605 int r; 606 607 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 608 if (r == 0 && *pathp == NULL) 609 *pathp = xstrdup("."); 610 return r; 611 } 612 613 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 614 static int 615 append(char *cp, char ***ap, size_t *np) 616 { 617 char **tmp; 618 619 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 620 return -1; 621 tmp[(*np)] = cp; 622 (*np)++; 623 *ap = tmp; 624 return 0; 625 } 626 627 /* 628 * Finds the start and end of the first brace pair in the pattern. 629 * returns 0 on success or -1 for invalid patterns. 630 */ 631 static int 632 find_brace(const char *pattern, int *startp, int *endp) 633 { 634 int i; 635 int in_bracket, brace_level; 636 637 *startp = *endp = -1; 638 in_bracket = brace_level = 0; 639 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 640 switch (pattern[i]) { 641 case '\\': 642 /* skip next character */ 643 if (pattern[i + 1] != '\0') 644 i++; 645 break; 646 case '[': 647 in_bracket = 1; 648 break; 649 case ']': 650 in_bracket = 0; 651 break; 652 case '{': 653 if (in_bracket) 654 break; 655 if (pattern[i + 1] == '}') { 656 /* Protect a single {}, for find(1), like csh */ 657 i++; /* skip */ 658 break; 659 } 660 if (*startp == -1) 661 *startp = i; 662 brace_level++; 663 break; 664 case '}': 665 if (in_bracket) 666 break; 667 if (*startp < 0) { 668 /* Unbalanced brace */ 669 return -1; 670 } 671 if (--brace_level <= 0) 672 *endp = i; 673 break; 674 } 675 } 676 /* unbalanced brackets/braces */ 677 if (*endp < 0 && (*startp >= 0 || in_bracket)) 678 return -1; 679 return 0; 680 } 681 682 /* 683 * Assembles and records a successfully-expanded pattern, returns -1 on 684 * alloc failure. 685 */ 686 static int 687 emit_expansion(const char *pattern, int brace_start, int brace_end, 688 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 689 { 690 char *cp; 691 int o = 0, tail_len = strlen(pattern + brace_end + 1); 692 693 if ((cp = malloc(brace_start + (sel_end - sel_start) + 694 tail_len + 1)) == NULL) 695 return -1; 696 697 /* Pattern before initial brace */ 698 if (brace_start > 0) { 699 memcpy(cp, pattern, brace_start); 700 o = brace_start; 701 } 702 /* Current braced selection */ 703 if (sel_end - sel_start > 0) { 704 memcpy(cp + o, pattern + sel_start, 705 sel_end - sel_start); 706 o += sel_end - sel_start; 707 } 708 /* Remainder of pattern after closing brace */ 709 if (tail_len > 0) { 710 memcpy(cp + o, pattern + brace_end + 1, tail_len); 711 o += tail_len; 712 } 713 cp[o] = '\0'; 714 if (append(cp, patternsp, npatternsp) != 0) { 715 free(cp); 716 return -1; 717 } 718 return 0; 719 } 720 721 /* 722 * Expand the first encountered brace in pattern, appending the expanded 723 * patterns it yielded to the *patternsp array. 724 * 725 * Returns 0 on success or -1 on allocation failure. 726 * 727 * Signals whether expansion was performed via *expanded and whether 728 * pattern was invalid via *invalid. 729 */ 730 static int 731 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 732 int *expanded, int *invalid) 733 { 734 int i; 735 int in_bracket, brace_start, brace_end, brace_level; 736 int sel_start, sel_end; 737 738 *invalid = *expanded = 0; 739 740 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 741 *invalid = 1; 742 return 0; 743 } else if (brace_start == -1) 744 return 0; 745 746 in_bracket = brace_level = 0; 747 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 748 switch (pattern[i]) { 749 case '{': 750 if (in_bracket) 751 break; 752 brace_level++; 753 break; 754 case '}': 755 if (in_bracket) 756 break; 757 brace_level--; 758 break; 759 case '[': 760 in_bracket = 1; 761 break; 762 case ']': 763 in_bracket = 0; 764 break; 765 case '\\': 766 if (i < brace_end - 1) 767 i++; /* skip */ 768 break; 769 } 770 if (pattern[i] == ',' || i == brace_end - 1) { 771 if (in_bracket || brace_level > 0) 772 continue; 773 /* End of a selection, emit an expanded pattern */ 774 775 /* Adjust end index for last selection */ 776 sel_end = (i == brace_end - 1) ? brace_end : i; 777 if (emit_expansion(pattern, brace_start, brace_end, 778 sel_start, sel_end, patternsp, npatternsp) != 0) 779 return -1; 780 /* move on to the next selection */ 781 sel_start = i + 1; 782 continue; 783 } 784 } 785 if (in_bracket || brace_level > 0) { 786 *invalid = 1; 787 return 0; 788 } 789 /* success */ 790 *expanded = 1; 791 return 0; 792 } 793 794 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 795 static int 796 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 797 { 798 char *cp, *cp2, **active = NULL, **done = NULL; 799 size_t i, nactive = 0, ndone = 0; 800 int ret = -1, invalid = 0, expanded = 0; 801 802 *patternsp = NULL; 803 *npatternsp = 0; 804 805 /* Start the worklist with the original pattern */ 806 if ((cp = strdup(pattern)) == NULL) 807 return -1; 808 if (append(cp, &active, &nactive) != 0) { 809 free(cp); 810 return -1; 811 } 812 while (nactive > 0) { 813 cp = active[nactive - 1]; 814 nactive--; 815 if (brace_expand_one(cp, &active, &nactive, 816 &expanded, &invalid) == -1) { 817 free(cp); 818 goto fail; 819 } 820 if (invalid) 821 fatal("%s: invalid brace pattern \"%s\"", __func__, cp); 822 if (expanded) { 823 /* 824 * Current entry expanded to new entries on the 825 * active list; discard the progenitor pattern. 826 */ 827 free(cp); 828 continue; 829 } 830 /* 831 * Pattern did not expand; append the finename component to 832 * the completed list 833 */ 834 if ((cp2 = strrchr(cp, '/')) != NULL) 835 *cp2++ = '\0'; 836 else 837 cp2 = cp; 838 if (append(xstrdup(cp2), &done, &ndone) != 0) { 839 free(cp); 840 goto fail; 841 } 842 free(cp); 843 } 844 /* success */ 845 *patternsp = done; 846 *npatternsp = ndone; 847 done = NULL; 848 ndone = 0; 849 ret = 0; 850 fail: 851 for (i = 0; i < nactive; i++) 852 free(active[i]); 853 free(active); 854 for (i = 0; i < ndone; i++) 855 free(done[i]); 856 free(done); 857 return ret; 858 } 859 860 void 861 toremote(int argc, char **argv) 862 { 863 char *suser = NULL, *host = NULL, *src = NULL; 864 char *bp, *tuser, *thost, *targ; 865 int sport = -1, tport = -1; 866 arglist alist; 867 int i, r; 868 u_int j; 869 870 memset(&alist, '\0', sizeof(alist)); 871 alist.list = NULL; 872 873 /* Parse target */ 874 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 875 if (r == -1) { 876 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 877 ++errs; 878 goto out; 879 } 880 if (r != 0) { 881 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 882 &targ) == -1) { 883 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 884 ++errs; 885 goto out; 886 } 887 } 888 if (tuser != NULL && !okname(tuser)) { 889 ++errs; 890 goto out; 891 } 892 893 /* Parse source files */ 894 for (i = 0; i < argc - 1; i++) { 895 free(suser); 896 free(host); 897 free(src); 898 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 899 if (r == -1) { 900 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 901 ++errs; 902 continue; 903 } 904 if (r != 0) { 905 parse_user_host_path(argv[i], &suser, &host, &src); 906 } 907 if (suser != NULL && !okname(suser)) { 908 ++errs; 909 continue; 910 } 911 if (host && throughlocal) { /* extended remote to remote */ 912 xasprintf(&bp, "%s -f %s%s", cmd, 913 *src == '-' ? "-- " : "", src); 914 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) 915 exit(1); 916 free(bp); 917 xasprintf(&bp, "%s -t %s%s", cmd, 918 *targ == '-' ? "-- " : "", targ); 919 if (do_cmd2(thost, tuser, tport, bp, remin, remout) < 0) 920 exit(1); 921 free(bp); 922 (void) close(remin); 923 (void) close(remout); 924 remin = remout = -1; 925 } else if (host) { /* standard remote to remote */ 926 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 927 /* This would require the remote support URIs */ 928 fatal("target port not supported with two " 929 "remote hosts without the -3 option"); 930 } 931 932 freeargs(&alist); 933 addargs(&alist, "%s", ssh_program); 934 addargs(&alist, "-x"); 935 addargs(&alist, "-oClearAllForwardings=yes"); 936 addargs(&alist, "-n"); 937 for (j = 0; j < remote_remote_args.num; j++) { 938 addargs(&alist, "%s", 939 remote_remote_args.list[j]); 940 } 941 942 if (sport != -1) { 943 addargs(&alist, "-p"); 944 addargs(&alist, "%d", sport); 945 } 946 if (suser) { 947 addargs(&alist, "-l"); 948 addargs(&alist, "%s", suser); 949 } 950 addargs(&alist, "--"); 951 addargs(&alist, "%s", host); 952 addargs(&alist, "%s", cmd); 953 addargs(&alist, "%s", src); 954 addargs(&alist, "%s%s%s:%s", 955 tuser ? tuser : "", tuser ? "@" : "", 956 thost, targ); 957 if (do_local_cmd(&alist) != 0) 958 errs = 1; 959 } else { /* local to remote */ 960 if (remin == -1) { 961 xasprintf(&bp, "%s -t %s%s", cmd, 962 *targ == '-' ? "-- " : "", targ); 963 if (do_cmd(thost, tuser, tport, bp, &remin, 964 &remout) < 0) 965 exit(1); 966 if (response() < 0) 967 exit(1); 968 free(bp); 969 } 970 source(1, argv + i); 971 } 972 } 973 out: 974 free(tuser); 975 free(thost); 976 free(targ); 977 free(suser); 978 free(host); 979 free(src); 980 } 981 982 void 983 tolocal(int argc, char **argv) 984 { 985 char *bp, *host = NULL, *src = NULL, *suser = NULL; 986 arglist alist; 987 int i, r, sport = -1; 988 989 memset(&alist, '\0', sizeof(alist)); 990 alist.list = NULL; 991 992 for (i = 0; i < argc - 1; i++) { 993 free(suser); 994 free(host); 995 free(src); 996 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 997 if (r == -1) { 998 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 999 ++errs; 1000 continue; 1001 } 1002 if (r != 0) 1003 parse_user_host_path(argv[i], &suser, &host, &src); 1004 if (suser != NULL && !okname(suser)) { 1005 ++errs; 1006 continue; 1007 } 1008 if (!host) { /* Local to local. */ 1009 freeargs(&alist); 1010 addargs(&alist, "%s", _PATH_CP); 1011 if (iamrecursive) 1012 addargs(&alist, "-r"); 1013 if (pflag) 1014 addargs(&alist, "-p"); 1015 addargs(&alist, "--"); 1016 addargs(&alist, "%s", argv[i]); 1017 addargs(&alist, "%s", argv[argc-1]); 1018 if (do_local_cmd(&alist)) 1019 ++errs; 1020 continue; 1021 } 1022 /* Remote to local. */ 1023 xasprintf(&bp, "%s -f %s%s", 1024 cmd, *src == '-' ? "-- " : "", src); 1025 if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) { 1026 free(bp); 1027 ++errs; 1028 continue; 1029 } 1030 free(bp); 1031 sink(1, argv + argc - 1, src); 1032 (void) close(remin); 1033 remin = remout = -1; 1034 } 1035 free(suser); 1036 free(host); 1037 free(src); 1038 } 1039 1040 void 1041 source(int argc, char **argv) 1042 { 1043 struct stat stb; 1044 static BUF buffer; 1045 BUF *bp; 1046 off_t i, statbytes; 1047 size_t amt, nr; 1048 int fd = -1, haderr, indx; 1049 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1050 int len; 1051 1052 for (indx = 0; indx < argc; ++indx) { 1053 name = argv[indx]; 1054 statbytes = 0; 1055 len = strlen(name); 1056 while (len > 1 && name[len-1] == '/') 1057 name[--len] = '\0'; 1058 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) == -1) 1059 goto syserr; 1060 if (strchr(name, '\n') != NULL) { 1061 strnvis(encname, name, sizeof(encname), VIS_NL); 1062 name = encname; 1063 } 1064 if (fstat(fd, &stb) == -1) { 1065 syserr: run_err("%s: %s", name, strerror(errno)); 1066 goto next; 1067 } 1068 if (stb.st_size < 0) { 1069 run_err("%s: %s", name, "Negative file size"); 1070 goto next; 1071 } 1072 unset_nonblock(fd); 1073 switch (stb.st_mode & S_IFMT) { 1074 case S_IFREG: 1075 break; 1076 case S_IFDIR: 1077 if (iamrecursive) { 1078 rsource(name, &stb); 1079 goto next; 1080 } 1081 /* FALLTHROUGH */ 1082 default: 1083 run_err("%s: not a regular file", name); 1084 goto next; 1085 } 1086 if ((last = strrchr(name, '/')) == NULL) 1087 last = name; 1088 else 1089 ++last; 1090 curfile = last; 1091 if (pflag) { 1092 if (do_times(remout, verbose_mode, &stb) < 0) 1093 goto next; 1094 } 1095 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1096 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1097 (u_int) (stb.st_mode & FILEMODEMASK), 1098 (long long)stb.st_size, last); 1099 if (verbose_mode) 1100 fmprintf(stderr, "Sending file modes: %s", buf); 1101 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1102 if (response() < 0) 1103 goto next; 1104 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1105 next: if (fd != -1) { 1106 (void) close(fd); 1107 fd = -1; 1108 } 1109 continue; 1110 } 1111 if (showprogress) 1112 start_progress_meter(curfile, stb.st_size, &statbytes); 1113 set_nonblock(remout); 1114 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1115 amt = bp->cnt; 1116 if (i + (off_t)amt > stb.st_size) 1117 amt = stb.st_size - i; 1118 if (!haderr) { 1119 if ((nr = atomicio(read, fd, 1120 bp->buf, amt)) != amt) { 1121 haderr = errno; 1122 memset(bp->buf + nr, 0, amt - nr); 1123 } 1124 } 1125 /* Keep writing after error to retain sync */ 1126 if (haderr) { 1127 (void)atomicio(vwrite, remout, bp->buf, amt); 1128 memset(bp->buf, 0, amt); 1129 continue; 1130 } 1131 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1132 &statbytes) != amt) 1133 haderr = errno; 1134 } 1135 unset_nonblock(remout); 1136 1137 if (fd != -1) { 1138 if (close(fd) == -1 && !haderr) 1139 haderr = errno; 1140 fd = -1; 1141 } 1142 if (!haderr) 1143 (void) atomicio(vwrite, remout, "", 1); 1144 else 1145 run_err("%s: %s", name, strerror(haderr)); 1146 (void) response(); 1147 if (showprogress) 1148 stop_progress_meter(); 1149 } 1150 } 1151 1152 void 1153 rsource(char *name, struct stat *statp) 1154 { 1155 DIR *dirp; 1156 struct dirent *dp; 1157 char *last, *vect[1], path[PATH_MAX]; 1158 1159 if (!(dirp = opendir(name))) { 1160 run_err("%s: %s", name, strerror(errno)); 1161 return; 1162 } 1163 last = strrchr(name, '/'); 1164 if (last == NULL) 1165 last = name; 1166 else 1167 last++; 1168 if (pflag) { 1169 if (do_times(remout, verbose_mode, statp) < 0) { 1170 closedir(dirp); 1171 return; 1172 } 1173 } 1174 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1175 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1176 if (verbose_mode) 1177 fmprintf(stderr, "Entering directory: %s", path); 1178 (void) atomicio(vwrite, remout, path, strlen(path)); 1179 if (response() < 0) { 1180 closedir(dirp); 1181 return; 1182 } 1183 while ((dp = readdir(dirp)) != NULL) { 1184 if (dp->d_ino == 0) 1185 continue; 1186 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1187 continue; 1188 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 1189 run_err("%s/%s: name too long", name, dp->d_name); 1190 continue; 1191 } 1192 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 1193 vect[0] = path; 1194 source(1, vect); 1195 } 1196 (void) closedir(dirp); 1197 (void) atomicio(vwrite, remout, "E\n", 2); 1198 (void) response(); 1199 } 1200 1201 #define TYPE_OVERFLOW(type, val) \ 1202 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1203 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1204 (sizeof(type) != 4 && sizeof(type) != 8)) 1205 1206 void 1207 sink(int argc, char **argv, const char *src) 1208 { 1209 static BUF buffer; 1210 struct stat stb; 1211 BUF *bp; 1212 off_t i; 1213 size_t j, count; 1214 int amt, exists, first, ofd; 1215 mode_t mode, omode, mask; 1216 off_t size, statbytes; 1217 unsigned long long ull; 1218 int setimes, targisdir, wrerr; 1219 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 1220 char **patterns = NULL; 1221 size_t n, npatterns = 0; 1222 struct timeval tv[2]; 1223 1224 #define atime tv[0] 1225 #define mtime tv[1] 1226 #define SCREWUP(str) { why = str; goto screwup; } 1227 1228 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1229 SCREWUP("Unexpected off_t/time_t size"); 1230 1231 setimes = targisdir = 0; 1232 mask = umask(0); 1233 if (!pflag) 1234 (void) umask(mask); 1235 if (argc != 1) { 1236 run_err("ambiguous target"); 1237 exit(1); 1238 } 1239 targ = *argv; 1240 if (targetshouldbedirectory) 1241 verifydir(targ); 1242 1243 (void) atomicio(vwrite, remout, "", 1); 1244 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1245 targisdir = 1; 1246 if (src != NULL && !iamrecursive && !Tflag) { 1247 /* 1248 * Prepare to try to restrict incoming filenames to match 1249 * the requested destination file glob. 1250 */ 1251 if (brace_expand(src, &patterns, &npatterns) != 0) 1252 fatal("%s: could not expand pattern", __func__); 1253 } 1254 for (first = 1;; first = 0) { 1255 cp = buf; 1256 if (atomicio(read, remin, cp, 1) != 1) 1257 goto done; 1258 if (*cp++ == '\n') 1259 SCREWUP("unexpected <newline>"); 1260 do { 1261 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1262 SCREWUP("lost connection"); 1263 *cp++ = ch; 1264 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1265 *cp = 0; 1266 if (verbose_mode) 1267 fmprintf(stderr, "Sink: %s", buf); 1268 1269 if (buf[0] == '\01' || buf[0] == '\02') { 1270 if (iamremote == 0) { 1271 (void) snmprintf(visbuf, sizeof(visbuf), 1272 NULL, "%s", buf + 1); 1273 (void) atomicio(vwrite, STDERR_FILENO, 1274 visbuf, strlen(visbuf)); 1275 } 1276 if (buf[0] == '\02') 1277 exit(1); 1278 ++errs; 1279 continue; 1280 } 1281 if (buf[0] == 'E') { 1282 (void) atomicio(vwrite, remout, "", 1); 1283 goto done; 1284 } 1285 if (ch == '\n') 1286 *--cp = 0; 1287 1288 cp = buf; 1289 if (*cp == 'T') { 1290 setimes++; 1291 cp++; 1292 if (!isdigit((unsigned char)*cp)) 1293 SCREWUP("mtime.sec not present"); 1294 ull = strtoull(cp, &cp, 10); 1295 if (!cp || *cp++ != ' ') 1296 SCREWUP("mtime.sec not delimited"); 1297 if (TYPE_OVERFLOW(time_t, ull)) 1298 setimes = 0; /* out of range */ 1299 mtime.tv_sec = ull; 1300 mtime.tv_usec = strtol(cp, &cp, 10); 1301 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1302 mtime.tv_usec > 999999) 1303 SCREWUP("mtime.usec not delimited"); 1304 if (!isdigit((unsigned char)*cp)) 1305 SCREWUP("atime.sec not present"); 1306 ull = strtoull(cp, &cp, 10); 1307 if (!cp || *cp++ != ' ') 1308 SCREWUP("atime.sec not delimited"); 1309 if (TYPE_OVERFLOW(time_t, ull)) 1310 setimes = 0; /* out of range */ 1311 atime.tv_sec = ull; 1312 atime.tv_usec = strtol(cp, &cp, 10); 1313 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1314 atime.tv_usec > 999999) 1315 SCREWUP("atime.usec not delimited"); 1316 (void) atomicio(vwrite, remout, "", 1); 1317 continue; 1318 } 1319 if (*cp != 'C' && *cp != 'D') { 1320 /* 1321 * Check for the case "rcp remote:foo\* local:bar". 1322 * In this case, the line "No match." can be returned 1323 * by the shell before the rcp command on the remote is 1324 * executed so the ^Aerror_message convention isn't 1325 * followed. 1326 */ 1327 if (first) { 1328 run_err("%s", cp); 1329 exit(1); 1330 } 1331 SCREWUP("expected control record"); 1332 } 1333 mode = 0; 1334 for (++cp; cp < buf + 5; cp++) { 1335 if (*cp < '0' || *cp > '7') 1336 SCREWUP("bad mode"); 1337 mode = (mode << 3) | (*cp - '0'); 1338 } 1339 if (!pflag) 1340 mode &= ~mask; 1341 if (*cp++ != ' ') 1342 SCREWUP("mode not delimited"); 1343 1344 if (!isdigit((unsigned char)*cp)) 1345 SCREWUP("size not present"); 1346 ull = strtoull(cp, &cp, 10); 1347 if (!cp || *cp++ != ' ') 1348 SCREWUP("size not delimited"); 1349 if (TYPE_OVERFLOW(off_t, ull)) 1350 SCREWUP("size out of range"); 1351 size = (off_t)ull; 1352 1353 if (*cp == '\0' || strchr(cp, '/') != NULL || 1354 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1355 run_err("error: unexpected filename: %s", cp); 1356 exit(1); 1357 } 1358 if (npatterns > 0) { 1359 for (n = 0; n < npatterns; n++) { 1360 if (fnmatch(patterns[n], cp, 0) == 0) 1361 break; 1362 } 1363 if (n >= npatterns) 1364 SCREWUP("filename does not match request"); 1365 } 1366 if (targisdir) { 1367 static char *namebuf; 1368 static size_t cursize; 1369 size_t need; 1370 1371 need = strlen(targ) + strlen(cp) + 250; 1372 if (need > cursize) { 1373 free(namebuf); 1374 namebuf = xmalloc(need); 1375 cursize = need; 1376 } 1377 (void) snprintf(namebuf, need, "%s%s%s", targ, 1378 strcmp(targ, "/") ? "/" : "", cp); 1379 np = namebuf; 1380 } else 1381 np = targ; 1382 curfile = cp; 1383 exists = stat(np, &stb) == 0; 1384 if (buf[0] == 'D') { 1385 int mod_flag = pflag; 1386 if (!iamrecursive) 1387 SCREWUP("received directory without -r"); 1388 if (exists) { 1389 if (!S_ISDIR(stb.st_mode)) { 1390 errno = ENOTDIR; 1391 goto bad; 1392 } 1393 if (pflag) 1394 (void) chmod(np, mode); 1395 } else { 1396 /* Handle copying from a read-only 1397 directory */ 1398 mod_flag = 1; 1399 if (mkdir(np, mode | S_IRWXU) == -1) 1400 goto bad; 1401 } 1402 vect[0] = xstrdup(np); 1403 sink(1, vect, src); 1404 if (setimes) { 1405 setimes = 0; 1406 (void) utimes(vect[0], tv); 1407 } 1408 if (mod_flag) 1409 (void) chmod(vect[0], mode); 1410 free(vect[0]); 1411 continue; 1412 } 1413 omode = mode; 1414 mode |= S_IWUSR; 1415 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1416 bad: run_err("%s: %s", np, strerror(errno)); 1417 continue; 1418 } 1419 (void) atomicio(vwrite, remout, "", 1); 1420 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1421 (void) close(ofd); 1422 continue; 1423 } 1424 cp = bp->buf; 1425 wrerr = 0; 1426 1427 /* 1428 * NB. do not use run_err() unless immediately followed by 1429 * exit() below as it may send a spurious reply that might 1430 * desyncronise us from the peer. Use note_err() instead. 1431 */ 1432 statbytes = 0; 1433 if (showprogress) 1434 start_progress_meter(curfile, size, &statbytes); 1435 set_nonblock(remin); 1436 for (count = i = 0; i < size; i += bp->cnt) { 1437 amt = bp->cnt; 1438 if (i + amt > size) 1439 amt = size - i; 1440 count += amt; 1441 do { 1442 j = atomicio6(read, remin, cp, amt, 1443 scpio, &statbytes); 1444 if (j == 0) { 1445 run_err("%s", j != EPIPE ? 1446 strerror(errno) : 1447 "dropped connection"); 1448 exit(1); 1449 } 1450 amt -= j; 1451 cp += j; 1452 } while (amt > 0); 1453 1454 if (count == bp->cnt) { 1455 /* Keep reading so we stay sync'd up. */ 1456 if (!wrerr) { 1457 if (atomicio(vwrite, ofd, bp->buf, 1458 count) != count) { 1459 note_err("%s: %s", np, 1460 strerror(errno)); 1461 wrerr = 1; 1462 } 1463 } 1464 count = 0; 1465 cp = bp->buf; 1466 } 1467 } 1468 unset_nonblock(remin); 1469 if (count != 0 && !wrerr && 1470 atomicio(vwrite, ofd, bp->buf, count) != count) { 1471 note_err("%s: %s", np, strerror(errno)); 1472 wrerr = 1; 1473 } 1474 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1475 ftruncate(ofd, size) != 0) 1476 note_err("%s: truncate: %s", np, strerror(errno)); 1477 if (pflag) { 1478 if (exists || omode != mode) 1479 if (fchmod(ofd, omode)) { 1480 note_err("%s: set mode: %s", 1481 np, strerror(errno)); 1482 } 1483 } else { 1484 if (!exists && omode != mode) 1485 if (fchmod(ofd, omode & ~mask)) { 1486 note_err("%s: set mode: %s", 1487 np, strerror(errno)); 1488 } 1489 } 1490 if (close(ofd) == -1) 1491 note_err("%s: close: %s", np, strerror(errno)); 1492 (void) response(); 1493 if (showprogress) 1494 stop_progress_meter(); 1495 if (setimes && !wrerr) { 1496 setimes = 0; 1497 if (utimes(np, tv) == -1) { 1498 note_err("%s: set times: %s", 1499 np, strerror(errno)); 1500 } 1501 } 1502 /* If no error was noted then signal success for this file */ 1503 if (note_err(NULL) == 0) 1504 (void) atomicio(vwrite, remout, "", 1); 1505 } 1506 done: 1507 for (n = 0; n < npatterns; n++) 1508 free(patterns[n]); 1509 free(patterns); 1510 return; 1511 screwup: 1512 for (n = 0; n < npatterns; n++) 1513 free(patterns[n]); 1514 free(patterns); 1515 run_err("protocol error: %s", why); 1516 exit(1); 1517 } 1518 1519 int 1520 response(void) 1521 { 1522 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1523 1524 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1525 lostconn(0); 1526 1527 cp = rbuf; 1528 switch (resp) { 1529 case 0: /* ok */ 1530 return (0); 1531 default: 1532 *cp++ = resp; 1533 /* FALLTHROUGH */ 1534 case 1: /* error, followed by error msg */ 1535 case 2: /* fatal error, "" */ 1536 do { 1537 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1538 lostconn(0); 1539 *cp++ = ch; 1540 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1541 1542 if (!iamremote) { 1543 cp[-1] = '\0'; 1544 (void) snmprintf(visbuf, sizeof(visbuf), 1545 NULL, "%s\n", rbuf); 1546 (void) atomicio(vwrite, STDERR_FILENO, 1547 visbuf, strlen(visbuf)); 1548 } 1549 ++errs; 1550 if (resp == 1) 1551 return (-1); 1552 exit(1); 1553 } 1554 /* NOTREACHED */ 1555 } 1556 1557 void 1558 usage(void) 1559 { 1560 (void) fprintf(stderr, 1561 "usage: scp [-346BCpqrTv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1562 " [-J destination] [-l limit] [-o ssh_option] [-P port]\n" 1563 " [-S program] source ... target\n"); 1564 exit(1); 1565 } 1566 1567 void 1568 run_err(const char *fmt,...) 1569 { 1570 static FILE *fp; 1571 va_list ap; 1572 1573 ++errs; 1574 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1575 (void) fprintf(fp, "%c", 0x01); 1576 (void) fprintf(fp, "scp: "); 1577 va_start(ap, fmt); 1578 (void) vfprintf(fp, fmt, ap); 1579 va_end(ap); 1580 (void) fprintf(fp, "\n"); 1581 (void) fflush(fp); 1582 } 1583 1584 if (!iamremote) { 1585 va_start(ap, fmt); 1586 vfmprintf(stderr, fmt, ap); 1587 va_end(ap); 1588 fprintf(stderr, "\n"); 1589 } 1590 } 1591 1592 /* 1593 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 1594 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 1595 * any active error at the end of the transfer. 1596 */ 1597 int 1598 note_err(const char *fmt, ...) 1599 { 1600 static char *emsg; 1601 va_list ap; 1602 1603 /* Replay any previously-noted error */ 1604 if (fmt == NULL) { 1605 if (emsg == NULL) 1606 return 0; 1607 run_err("%s", emsg); 1608 free(emsg); 1609 emsg = NULL; 1610 return -1; 1611 } 1612 1613 errs++; 1614 /* Prefer first-noted error */ 1615 if (emsg != NULL) 1616 return -1; 1617 1618 va_start(ap, fmt); 1619 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 1620 va_end(ap); 1621 return -1; 1622 } 1623 1624 void 1625 verifydir(char *cp) 1626 { 1627 struct stat stb; 1628 1629 if (!stat(cp, &stb)) { 1630 if (S_ISDIR(stb.st_mode)) 1631 return; 1632 errno = ENOTDIR; 1633 } 1634 run_err("%s: %s", cp, strerror(errno)); 1635 killchild(0); 1636 } 1637 1638 int 1639 okname(char *cp0) 1640 { 1641 int c; 1642 char *cp; 1643 1644 cp = cp0; 1645 do { 1646 c = (int)*cp; 1647 if (c & 0200) 1648 goto bad; 1649 if (!isalpha(c) && !isdigit((unsigned char)c)) { 1650 switch (c) { 1651 case '\'': 1652 case '"': 1653 case '`': 1654 case ' ': 1655 case '#': 1656 goto bad; 1657 default: 1658 break; 1659 } 1660 } 1661 } while (*++cp); 1662 return (1); 1663 1664 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 1665 return (0); 1666 } 1667 1668 BUF * 1669 allocbuf(BUF *bp, int fd, int blksize) 1670 { 1671 size_t size; 1672 struct stat stb; 1673 1674 if (fstat(fd, &stb) == -1) { 1675 run_err("fstat: %s", strerror(errno)); 1676 return (0); 1677 } 1678 size = ROUNDUP(stb.st_blksize, blksize); 1679 if (size == 0) 1680 size = blksize; 1681 if (bp->cnt >= size) 1682 return (bp); 1683 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 1684 bp->cnt = size; 1685 return (bp); 1686 } 1687 1688 void 1689 lostconn(int signo) 1690 { 1691 if (!iamremote) 1692 (void)write(STDERR_FILENO, "lost connection\n", 16); 1693 if (signo) 1694 _exit(1); 1695 else 1696 exit(1); 1697 } 1698