1 /* $OpenBSD: scp.c,v 1.233 2021/09/08 23:31:39 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 <glob.h> 87 #include <libgen.h> 88 #include <locale.h> 89 #include <pwd.h> 90 #include <signal.h> 91 #include <stdarg.h> 92 #include <stdint.h> 93 #include <stdio.h> 94 #include <stdlib.h> 95 #include <string.h> 96 #include <time.h> 97 #include <unistd.h> 98 #include <limits.h> 99 #include <vis.h> 100 101 #include "xmalloc.h" 102 #include "ssh.h" 103 #include "atomicio.h" 104 #include "pathnames.h" 105 #include "log.h" 106 #include "misc.h" 107 #include "progressmeter.h" 108 #include "utf8.h" 109 110 #include "sftp-common.h" 111 #include "sftp-client.h" 112 113 #define COPY_BUFLEN 16384 114 115 int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *); 116 int do_cmd2(char *, char *, int, char *, int, int); 117 118 /* Struct for addargs */ 119 arglist args; 120 arglist remote_remote_args; 121 122 /* Bandwidth limit */ 123 long long limit_kbps = 0; 124 struct bwlimit bwlimit; 125 126 /* Name of current file being transferred. */ 127 char *curfile; 128 129 /* This is set to non-zero to enable verbose mode. */ 130 int verbose_mode = 0; 131 LogLevel log_level = SYSLOG_LEVEL_INFO; 132 133 /* This is set to zero if the progressmeter is not desired. */ 134 int showprogress = 1; 135 136 /* 137 * This is set to non-zero if remote-remote copy should be piped 138 * through this process. 139 */ 140 int throughlocal = 1; 141 142 /* Non-standard port to use for the ssh connection or -1. */ 143 int sshport = -1; 144 145 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 146 char *ssh_program = _PATH_SSH_PROGRAM; 147 148 /* This is used to store the pid of ssh_program */ 149 pid_t do_cmd_pid = -1; 150 pid_t do_cmd_pid2 = -1; 151 152 /* Needed for sftp */ 153 volatile sig_atomic_t interrupted = 0; 154 155 int remote_glob(struct sftp_conn *, const char *, int, 156 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ 157 158 static void 159 killchild(int signo) 160 { 161 if (do_cmd_pid > 1) { 162 kill(do_cmd_pid, signo ? signo : SIGTERM); 163 waitpid(do_cmd_pid, NULL, 0); 164 } 165 if (do_cmd_pid2 > 1) { 166 kill(do_cmd_pid2, signo ? signo : SIGTERM); 167 waitpid(do_cmd_pid2, NULL, 0); 168 } 169 170 if (signo) 171 _exit(1); 172 exit(1); 173 } 174 175 static void 176 suspone(int pid, int signo) 177 { 178 int status; 179 180 if (pid > 1) { 181 kill(pid, signo); 182 while (waitpid(pid, &status, WUNTRACED) == -1 && 183 errno == EINTR) 184 ; 185 } 186 } 187 188 static void 189 suspchild(int signo) 190 { 191 suspone(do_cmd_pid, signo); 192 suspone(do_cmd_pid2, signo); 193 kill(getpid(), SIGSTOP); 194 } 195 196 static int 197 do_local_cmd(arglist *a) 198 { 199 u_int i; 200 int status; 201 pid_t pid; 202 203 if (a->num == 0) 204 fatal("do_local_cmd: no arguments"); 205 206 if (verbose_mode) { 207 fprintf(stderr, "Executing:"); 208 for (i = 0; i < a->num; i++) 209 fmprintf(stderr, " %s", a->list[i]); 210 fprintf(stderr, "\n"); 211 } 212 if ((pid = fork()) == -1) 213 fatal("do_local_cmd: fork: %s", strerror(errno)); 214 215 if (pid == 0) { 216 execvp(a->list[0], a->list); 217 perror(a->list[0]); 218 exit(1); 219 } 220 221 do_cmd_pid = pid; 222 ssh_signal(SIGTERM, killchild); 223 ssh_signal(SIGINT, killchild); 224 ssh_signal(SIGHUP, killchild); 225 226 while (waitpid(pid, &status, 0) == -1) 227 if (errno != EINTR) 228 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 229 230 do_cmd_pid = -1; 231 232 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 233 return (-1); 234 235 return (0); 236 } 237 238 /* 239 * This function executes the given command as the specified user on the 240 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 241 * assigns the input and output file descriptors on success. 242 */ 243 244 int 245 do_cmd(char *program, char *host, char *remuser, int port, int subsystem, 246 char *cmd, int *fdin, int *fdout, pid_t *pid) 247 { 248 int pin[2], pout[2], reserved[2]; 249 250 if (verbose_mode) 251 fmprintf(stderr, 252 "Executing: program %s host %s, user %s, command %s\n", 253 program, host, 254 remuser ? remuser : "(unspecified)", cmd); 255 256 if (port == -1) 257 port = sshport; 258 259 /* 260 * Reserve two descriptors so that the real pipes won't get 261 * descriptors 0 and 1 because that will screw up dup2 below. 262 */ 263 if (pipe(reserved) == -1) 264 fatal("pipe: %s", strerror(errno)); 265 266 /* Create a socket pair for communicating with ssh. */ 267 if (pipe(pin) == -1) 268 fatal("pipe: %s", strerror(errno)); 269 if (pipe(pout) == -1) 270 fatal("pipe: %s", strerror(errno)); 271 272 /* Free the reserved descriptors. */ 273 close(reserved[0]); 274 close(reserved[1]); 275 276 ssh_signal(SIGTSTP, suspchild); 277 ssh_signal(SIGTTIN, suspchild); 278 ssh_signal(SIGTTOU, suspchild); 279 280 /* Fork a child to execute the command on the remote host using ssh. */ 281 *pid = fork(); 282 if (*pid == 0) { 283 /* Child. */ 284 close(pin[1]); 285 close(pout[0]); 286 dup2(pin[0], 0); 287 dup2(pout[1], 1); 288 close(pin[0]); 289 close(pout[1]); 290 291 replacearg(&args, 0, "%s", program); 292 if (port != -1) { 293 addargs(&args, "-p"); 294 addargs(&args, "%d", port); 295 } 296 if (remuser != NULL) { 297 addargs(&args, "-l"); 298 addargs(&args, "%s", remuser); 299 } 300 if (subsystem) 301 addargs(&args, "-s"); 302 addargs(&args, "--"); 303 addargs(&args, "%s", host); 304 addargs(&args, "%s", cmd); 305 306 execvp(program, args.list); 307 perror(program); 308 exit(1); 309 } else if (*pid == -1) { 310 fatal("fork: %s", strerror(errno)); 311 } 312 /* Parent. Close the other side, and return the local side. */ 313 close(pin[0]); 314 *fdout = pin[1]; 315 close(pout[1]); 316 *fdin = pout[0]; 317 ssh_signal(SIGTERM, killchild); 318 ssh_signal(SIGINT, killchild); 319 ssh_signal(SIGHUP, killchild); 320 return 0; 321 } 322 323 /* 324 * This function executes a command similar to do_cmd(), but expects the 325 * input and output descriptors to be setup by a previous call to do_cmd(). 326 * This way the input and output of two commands can be connected. 327 */ 328 int 329 do_cmd2(char *host, char *remuser, int port, char *cmd, 330 int fdin, int fdout) 331 { 332 int status; 333 pid_t pid; 334 335 if (verbose_mode) 336 fmprintf(stderr, 337 "Executing: 2nd program %s host %s, user %s, command %s\n", 338 ssh_program, host, 339 remuser ? remuser : "(unspecified)", cmd); 340 341 if (port == -1) 342 port = sshport; 343 344 /* Fork a child to execute the command on the remote host using ssh. */ 345 pid = fork(); 346 if (pid == 0) { 347 dup2(fdin, 0); 348 dup2(fdout, 1); 349 350 replacearg(&args, 0, "%s", ssh_program); 351 if (port != -1) { 352 addargs(&args, "-p"); 353 addargs(&args, "%d", port); 354 } 355 if (remuser != NULL) { 356 addargs(&args, "-l"); 357 addargs(&args, "%s", remuser); 358 } 359 addargs(&args, "-oBatchMode=yes"); 360 addargs(&args, "--"); 361 addargs(&args, "%s", host); 362 addargs(&args, "%s", cmd); 363 364 execvp(ssh_program, args.list); 365 perror(ssh_program); 366 exit(1); 367 } else if (pid == -1) { 368 fatal("fork: %s", strerror(errno)); 369 } 370 while (waitpid(pid, &status, 0) == -1) 371 if (errno != EINTR) 372 fatal("do_cmd2: waitpid: %s", strerror(errno)); 373 return 0; 374 } 375 376 typedef struct { 377 size_t cnt; 378 char *buf; 379 } BUF; 380 381 BUF *allocbuf(BUF *, int, int); 382 void lostconn(int); 383 int okname(char *); 384 void run_err(const char *,...) 385 __attribute__((__format__ (printf, 1, 2))) 386 __attribute__((__nonnull__ (1))); 387 int note_err(const char *,...) 388 __attribute__((__format__ (printf, 1, 2))); 389 void verifydir(char *); 390 391 struct passwd *pwd; 392 uid_t userid; 393 int errs, remin, remout, remin2, remout2; 394 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 395 396 #define CMDNEEDS 64 397 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 398 399 enum scp_mode_e { 400 MODE_SCP, 401 MODE_SFTP 402 }; 403 404 int response(void); 405 void rsource(char *, struct stat *); 406 void sink(int, char *[], const char *); 407 void source(int, char *[]); 408 void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); 409 void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); 410 void usage(void); 411 412 void source_sftp(int, char *, char *, struct sftp_conn *); 413 void sink_sftp(int, char *, const char *, struct sftp_conn *); 414 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, 415 char *, char *); 416 417 int 418 main(int argc, char **argv) 419 { 420 int ch, fflag, tflag, status, n; 421 char **newargv, *argv0; 422 const char *errstr; 423 extern char *optarg; 424 extern int optind; 425 enum scp_mode_e mode = MODE_SFTP; 426 char *sftp_direct = NULL; 427 428 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 429 sanitise_stdfd(); 430 431 setlocale(LC_CTYPE, ""); 432 433 /* Copy argv, because we modify it */ 434 argv0 = argv[0]; 435 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 436 for (n = 0; n < argc; n++) 437 newargv[n] = xstrdup(argv[n]); 438 argv = newargv; 439 440 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 1); 441 442 memset(&args, '\0', sizeof(args)); 443 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 444 args.list = remote_remote_args.list = NULL; 445 addargs(&args, "%s", ssh_program); 446 addargs(&args, "-x"); 447 addargs(&args, "-oPermitLocalCommand=no"); 448 addargs(&args, "-oClearAllForwardings=yes"); 449 addargs(&args, "-oRemoteCommand=none"); 450 addargs(&args, "-oRequestTTY=no"); 451 452 fflag = Tflag = tflag = 0; 453 while ((ch = getopt(argc, argv, 454 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:")) != -1) { 455 switch (ch) { 456 /* User-visible flags. */ 457 case '1': 458 fatal("SSH protocol v.1 is no longer supported"); 459 break; 460 case '2': 461 /* Ignored */ 462 break; 463 case 'A': 464 case '4': 465 case '6': 466 case 'C': 467 addargs(&args, "-%c", ch); 468 addargs(&remote_remote_args, "-%c", ch); 469 break; 470 case 'D': 471 sftp_direct = optarg; 472 break; 473 case '3': 474 throughlocal = 1; 475 break; 476 case 'R': 477 throughlocal = 0; 478 break; 479 case 'o': 480 case 'c': 481 case 'i': 482 case 'F': 483 case 'J': 484 addargs(&remote_remote_args, "-%c", ch); 485 addargs(&remote_remote_args, "%s", optarg); 486 addargs(&args, "-%c", ch); 487 addargs(&args, "%s", optarg); 488 break; 489 case 'O': 490 mode = MODE_SCP; 491 break; 492 case 's': 493 mode = MODE_SFTP; 494 break; 495 case 'P': 496 sshport = a2port(optarg); 497 if (sshport <= 0) 498 fatal("bad port \"%s\"\n", optarg); 499 break; 500 case 'B': 501 addargs(&remote_remote_args, "-oBatchmode=yes"); 502 addargs(&args, "-oBatchmode=yes"); 503 break; 504 case 'l': 505 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 506 &errstr); 507 if (errstr != NULL) 508 usage(); 509 limit_kbps *= 1024; /* kbps */ 510 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 511 break; 512 case 'p': 513 pflag = 1; 514 break; 515 case 'r': 516 iamrecursive = 1; 517 break; 518 case 'S': 519 ssh_program = xstrdup(optarg); 520 break; 521 case 'v': 522 addargs(&args, "-v"); 523 addargs(&remote_remote_args, "-v"); 524 if (verbose_mode == 0) 525 log_level = SYSLOG_LEVEL_DEBUG1; 526 else if (log_level < SYSLOG_LEVEL_DEBUG3) 527 log_level++; 528 verbose_mode = 1; 529 break; 530 case 'q': 531 addargs(&args, "-q"); 532 addargs(&remote_remote_args, "-q"); 533 showprogress = 0; 534 break; 535 536 /* Server options. */ 537 case 'd': 538 targetshouldbedirectory = 1; 539 break; 540 case 'f': /* "from" */ 541 iamremote = 1; 542 fflag = 1; 543 break; 544 case 't': /* "to" */ 545 iamremote = 1; 546 tflag = 1; 547 break; 548 case 'T': 549 Tflag = 1; 550 break; 551 default: 552 usage(); 553 } 554 } 555 argc -= optind; 556 argv += optind; 557 558 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 1); 559 560 /* Do this last because we want the user to be able to override it */ 561 addargs(&args, "-oForwardAgent=no"); 562 563 if (iamremote) 564 mode = MODE_SCP; 565 566 if ((pwd = getpwuid(userid = getuid())) == NULL) 567 fatal("unknown user %u", (u_int) userid); 568 569 if (!isatty(STDOUT_FILENO)) 570 showprogress = 0; 571 572 if (pflag) { 573 /* Cannot pledge: -p allows setuid/setgid files... */ 574 } else { 575 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 576 NULL) == -1) { 577 perror("pledge"); 578 exit(1); 579 } 580 } 581 582 remin = STDIN_FILENO; 583 remout = STDOUT_FILENO; 584 585 if (fflag) { 586 /* Follow "protocol", send data. */ 587 (void) response(); 588 source(argc, argv); 589 exit(errs != 0); 590 } 591 if (tflag) { 592 /* Receive data. */ 593 sink(argc, argv, NULL); 594 exit(errs != 0); 595 } 596 if (argc < 2) 597 usage(); 598 if (argc > 2) 599 targetshouldbedirectory = 1; 600 601 remin = remout = -1; 602 do_cmd_pid = -1; 603 /* Command to be executed on remote system using "ssh". */ 604 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 605 verbose_mode ? " -v" : "", 606 iamrecursive ? " -r" : "", pflag ? " -p" : "", 607 targetshouldbedirectory ? " -d" : ""); 608 609 (void) ssh_signal(SIGPIPE, lostconn); 610 611 if (colon(argv[argc - 1])) /* Dest is remote host. */ 612 toremote(argc, argv, mode, sftp_direct); 613 else { 614 if (targetshouldbedirectory) 615 verifydir(argv[argc - 1]); 616 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */ 617 } 618 /* 619 * Finally check the exit status of the ssh process, if one was forked 620 * and no error has occurred yet 621 */ 622 if (do_cmd_pid != -1 && errs == 0) { 623 if (remin != -1) 624 (void) close(remin); 625 if (remout != -1) 626 (void) close(remout); 627 if (waitpid(do_cmd_pid, &status, 0) == -1) 628 errs = 1; 629 else { 630 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 631 errs = 1; 632 } 633 } 634 exit(errs != 0); 635 } 636 637 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 638 static int 639 scpio(void *_cnt, size_t s) 640 { 641 off_t *cnt = (off_t *)_cnt; 642 643 *cnt += s; 644 refresh_progress_meter(0); 645 if (limit_kbps > 0) 646 bandwidth_limit(&bwlimit, s); 647 return 0; 648 } 649 650 static int 651 do_times(int fd, int verb, const struct stat *sb) 652 { 653 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 654 char buf[(20 + 7 + 2) * 2 + 2]; 655 656 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 657 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 658 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 659 if (verb) { 660 fprintf(stderr, "File mtime %lld atime %lld\n", 661 (long long)sb->st_mtime, (long long)sb->st_atime); 662 fprintf(stderr, "Sending file timestamps: %s", buf); 663 } 664 (void) atomicio(vwrite, fd, buf, strlen(buf)); 665 return (response()); 666 } 667 668 static int 669 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 670 char **pathp) 671 { 672 int r; 673 674 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 675 if (r == 0 && *pathp == NULL) 676 *pathp = xstrdup("."); 677 return r; 678 } 679 680 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 681 static int 682 append(char *cp, char ***ap, size_t *np) 683 { 684 char **tmp; 685 686 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 687 return -1; 688 tmp[(*np)] = cp; 689 (*np)++; 690 *ap = tmp; 691 return 0; 692 } 693 694 /* 695 * Finds the start and end of the first brace pair in the pattern. 696 * returns 0 on success or -1 for invalid patterns. 697 */ 698 static int 699 find_brace(const char *pattern, int *startp, int *endp) 700 { 701 int i; 702 int in_bracket, brace_level; 703 704 *startp = *endp = -1; 705 in_bracket = brace_level = 0; 706 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 707 switch (pattern[i]) { 708 case '\\': 709 /* skip next character */ 710 if (pattern[i + 1] != '\0') 711 i++; 712 break; 713 case '[': 714 in_bracket = 1; 715 break; 716 case ']': 717 in_bracket = 0; 718 break; 719 case '{': 720 if (in_bracket) 721 break; 722 if (pattern[i + 1] == '}') { 723 /* Protect a single {}, for find(1), like csh */ 724 i++; /* skip */ 725 break; 726 } 727 if (*startp == -1) 728 *startp = i; 729 brace_level++; 730 break; 731 case '}': 732 if (in_bracket) 733 break; 734 if (*startp < 0) { 735 /* Unbalanced brace */ 736 return -1; 737 } 738 if (--brace_level <= 0) 739 *endp = i; 740 break; 741 } 742 } 743 /* unbalanced brackets/braces */ 744 if (*endp < 0 && (*startp >= 0 || in_bracket)) 745 return -1; 746 return 0; 747 } 748 749 /* 750 * Assembles and records a successfully-expanded pattern, returns -1 on 751 * alloc failure. 752 */ 753 static int 754 emit_expansion(const char *pattern, int brace_start, int brace_end, 755 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 756 { 757 char *cp; 758 int o = 0, tail_len = strlen(pattern + brace_end + 1); 759 760 if ((cp = malloc(brace_start + (sel_end - sel_start) + 761 tail_len + 1)) == NULL) 762 return -1; 763 764 /* Pattern before initial brace */ 765 if (brace_start > 0) { 766 memcpy(cp, pattern, brace_start); 767 o = brace_start; 768 } 769 /* Current braced selection */ 770 if (sel_end - sel_start > 0) { 771 memcpy(cp + o, pattern + sel_start, 772 sel_end - sel_start); 773 o += sel_end - sel_start; 774 } 775 /* Remainder of pattern after closing brace */ 776 if (tail_len > 0) { 777 memcpy(cp + o, pattern + brace_end + 1, tail_len); 778 o += tail_len; 779 } 780 cp[o] = '\0'; 781 if (append(cp, patternsp, npatternsp) != 0) { 782 free(cp); 783 return -1; 784 } 785 return 0; 786 } 787 788 /* 789 * Expand the first encountered brace in pattern, appending the expanded 790 * patterns it yielded to the *patternsp array. 791 * 792 * Returns 0 on success or -1 on allocation failure. 793 * 794 * Signals whether expansion was performed via *expanded and whether 795 * pattern was invalid via *invalid. 796 */ 797 static int 798 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 799 int *expanded, int *invalid) 800 { 801 int i; 802 int in_bracket, brace_start, brace_end, brace_level; 803 int sel_start, sel_end; 804 805 *invalid = *expanded = 0; 806 807 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 808 *invalid = 1; 809 return 0; 810 } else if (brace_start == -1) 811 return 0; 812 813 in_bracket = brace_level = 0; 814 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 815 switch (pattern[i]) { 816 case '{': 817 if (in_bracket) 818 break; 819 brace_level++; 820 break; 821 case '}': 822 if (in_bracket) 823 break; 824 brace_level--; 825 break; 826 case '[': 827 in_bracket = 1; 828 break; 829 case ']': 830 in_bracket = 0; 831 break; 832 case '\\': 833 if (i < brace_end - 1) 834 i++; /* skip */ 835 break; 836 } 837 if (pattern[i] == ',' || i == brace_end - 1) { 838 if (in_bracket || brace_level > 0) 839 continue; 840 /* End of a selection, emit an expanded pattern */ 841 842 /* Adjust end index for last selection */ 843 sel_end = (i == brace_end - 1) ? brace_end : i; 844 if (emit_expansion(pattern, brace_start, brace_end, 845 sel_start, sel_end, patternsp, npatternsp) != 0) 846 return -1; 847 /* move on to the next selection */ 848 sel_start = i + 1; 849 continue; 850 } 851 } 852 if (in_bracket || brace_level > 0) { 853 *invalid = 1; 854 return 0; 855 } 856 /* success */ 857 *expanded = 1; 858 return 0; 859 } 860 861 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 862 static int 863 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 864 { 865 char *cp, *cp2, **active = NULL, **done = NULL; 866 size_t i, nactive = 0, ndone = 0; 867 int ret = -1, invalid = 0, expanded = 0; 868 869 *patternsp = NULL; 870 *npatternsp = 0; 871 872 /* Start the worklist with the original pattern */ 873 if ((cp = strdup(pattern)) == NULL) 874 return -1; 875 if (append(cp, &active, &nactive) != 0) { 876 free(cp); 877 return -1; 878 } 879 while (nactive > 0) { 880 cp = active[nactive - 1]; 881 nactive--; 882 if (brace_expand_one(cp, &active, &nactive, 883 &expanded, &invalid) == -1) { 884 free(cp); 885 goto fail; 886 } 887 if (invalid) 888 fatal_f("invalid brace pattern \"%s\"", cp); 889 if (expanded) { 890 /* 891 * Current entry expanded to new entries on the 892 * active list; discard the progenitor pattern. 893 */ 894 free(cp); 895 continue; 896 } 897 /* 898 * Pattern did not expand; append the finename component to 899 * the completed list 900 */ 901 if ((cp2 = strrchr(cp, '/')) != NULL) 902 *cp2++ = '\0'; 903 else 904 cp2 = cp; 905 if (append(xstrdup(cp2), &done, &ndone) != 0) { 906 free(cp); 907 goto fail; 908 } 909 free(cp); 910 } 911 /* success */ 912 *patternsp = done; 913 *npatternsp = ndone; 914 done = NULL; 915 ndone = 0; 916 ret = 0; 917 fail: 918 for (i = 0; i < nactive; i++) 919 free(active[i]); 920 free(active); 921 for (i = 0; i < ndone; i++) 922 free(done[i]); 923 free(done); 924 return ret; 925 } 926 927 static struct sftp_conn * 928 do_sftp_connect(char *host, char *user, int port, char *sftp_direct, 929 int *reminp, int *remoutp, int *pidp) 930 { 931 if (sftp_direct == NULL) { 932 if (do_cmd(ssh_program, host, user, port, 1, "sftp", 933 reminp, remoutp, pidp) < 0) 934 return NULL; 935 936 } else { 937 args.list = NULL; 938 addargs(&args, "sftp-server"); 939 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", 940 reminp, remoutp, pidp) < 0) 941 return NULL; 942 } 943 return do_init(*reminp, *remoutp, 32768, 64, limit_kbps); 944 } 945 946 void 947 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 948 { 949 char *suser = NULL, *host = NULL, *src = NULL; 950 char *bp, *tuser, *thost, *targ; 951 int sport = -1, tport = -1; 952 struct sftp_conn *conn = NULL, *conn2 = NULL; 953 arglist alist; 954 int i, r, status; 955 u_int j; 956 957 memset(&alist, '\0', sizeof(alist)); 958 alist.list = NULL; 959 960 /* Parse target */ 961 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 962 if (r == -1) { 963 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 964 ++errs; 965 goto out; 966 } 967 if (r != 0) { 968 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 969 &targ) == -1) { 970 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 971 ++errs; 972 goto out; 973 } 974 } 975 976 /* Parse source files */ 977 for (i = 0; i < argc - 1; i++) { 978 free(suser); 979 free(host); 980 free(src); 981 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 982 if (r == -1) { 983 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 984 ++errs; 985 continue; 986 } 987 if (r != 0) { 988 parse_user_host_path(argv[i], &suser, &host, &src); 989 } 990 if (suser != NULL && !okname(suser)) { 991 ++errs; 992 continue; 993 } 994 if (host && throughlocal) { /* extended remote to remote */ 995 if (mode == MODE_SFTP) { 996 if (remin == -1) { 997 /* Connect to dest now */ 998 conn = do_sftp_connect(thost, tuser, 999 tport, sftp_direct, 1000 &remin, &remout, &do_cmd_pid); 1001 if (conn == NULL) { 1002 fatal("Unable to open " 1003 "destination connection"); 1004 } 1005 debug3_f("origin in %d out %d pid %ld", 1006 remin, remout, (long)do_cmd_pid); 1007 } 1008 /* 1009 * XXX remember suser/host/sport and only 1010 * reconnect if they change between arguments. 1011 * would save reconnections for cases like 1012 * scp -3 hosta:/foo hosta:/bar hostb: 1013 */ 1014 /* Connect to origin now */ 1015 conn2 = do_sftp_connect(host, suser, 1016 sport, sftp_direct, 1017 &remin2, &remout2, &do_cmd_pid2); 1018 if (conn2 == NULL) { 1019 fatal("Unable to open " 1020 "source connection"); 1021 } 1022 debug3_f("destination in %d out %d pid %ld", 1023 remin2, remout2, (long)do_cmd_pid2); 1024 throughlocal_sftp(conn2, conn, src, targ); 1025 (void) close(remin2); 1026 (void) close(remout2); 1027 remin2 = remout2 = -1; 1028 if (waitpid(do_cmd_pid2, &status, 0) == -1) 1029 ++errs; 1030 else if (!WIFEXITED(status) || 1031 WEXITSTATUS(status) != 0) 1032 ++errs; 1033 do_cmd_pid2 = -1; 1034 continue; 1035 } else { 1036 xasprintf(&bp, "%s -f %s%s", cmd, 1037 *src == '-' ? "-- " : "", src); 1038 if (do_cmd(ssh_program, host, suser, sport, 0, 1039 bp, &remin, &remout, &do_cmd_pid) < 0) 1040 exit(1); 1041 free(bp); 1042 xasprintf(&bp, "%s -t %s%s", cmd, 1043 *targ == '-' ? "-- " : "", targ); 1044 if (do_cmd2(thost, tuser, tport, bp, 1045 remin, remout) < 0) 1046 exit(1); 1047 free(bp); 1048 (void) close(remin); 1049 (void) close(remout); 1050 remin = remout = -1; 1051 } 1052 } else if (host) { /* standard remote to remote */ 1053 /* 1054 * Second remote user is passed to first remote side 1055 * via scp command-line. Ensure it contains no obvious 1056 * shell characters. 1057 */ 1058 if (tuser != NULL && !okname(tuser)) { 1059 ++errs; 1060 continue; 1061 } 1062 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 1063 /* This would require the remote support URIs */ 1064 fatal("target port not supported with two " 1065 "remote hosts and the -R option"); 1066 } 1067 1068 freeargs(&alist); 1069 addargs(&alist, "%s", ssh_program); 1070 addargs(&alist, "-x"); 1071 addargs(&alist, "-oClearAllForwardings=yes"); 1072 addargs(&alist, "-n"); 1073 for (j = 0; j < remote_remote_args.num; j++) { 1074 addargs(&alist, "%s", 1075 remote_remote_args.list[j]); 1076 } 1077 1078 if (sport != -1) { 1079 addargs(&alist, "-p"); 1080 addargs(&alist, "%d", sport); 1081 } 1082 if (suser) { 1083 addargs(&alist, "-l"); 1084 addargs(&alist, "%s", suser); 1085 } 1086 addargs(&alist, "--"); 1087 addargs(&alist, "%s", host); 1088 addargs(&alist, "%s", cmd); 1089 addargs(&alist, "%s", src); 1090 addargs(&alist, "%s%s%s:%s", 1091 tuser ? tuser : "", tuser ? "@" : "", 1092 thost, targ); 1093 if (do_local_cmd(&alist) != 0) 1094 errs = 1; 1095 } else { /* local to remote */ 1096 if (mode == MODE_SFTP) { 1097 if (remin == -1) { 1098 /* Connect to remote now */ 1099 conn = do_sftp_connect(thost, tuser, 1100 tport, sftp_direct, 1101 &remin, &remout, &do_cmd_pid); 1102 if (conn == NULL) { 1103 fatal("Unable to open sftp " 1104 "connection"); 1105 } 1106 } 1107 1108 /* The protocol */ 1109 source_sftp(1, argv[i], targ, conn); 1110 continue; 1111 } 1112 /* SCP */ 1113 if (remin == -1) { 1114 xasprintf(&bp, "%s -t %s%s", cmd, 1115 *targ == '-' ? "-- " : "", targ); 1116 if (do_cmd(ssh_program, thost, tuser, tport, 0, 1117 bp, &remin, &remout, &do_cmd_pid) < 0) 1118 exit(1); 1119 if (response() < 0) 1120 exit(1); 1121 free(bp); 1122 } 1123 source(1, argv + i); 1124 } 1125 } 1126 out: 1127 if (mode == MODE_SFTP) 1128 free(conn); 1129 free(tuser); 1130 free(thost); 1131 free(targ); 1132 free(suser); 1133 free(host); 1134 free(src); 1135 } 1136 1137 void 1138 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 1139 { 1140 char *bp, *host = NULL, *src = NULL, *suser = NULL; 1141 arglist alist; 1142 struct sftp_conn *conn = NULL; 1143 int i, r, sport = -1; 1144 1145 memset(&alist, '\0', sizeof(alist)); 1146 alist.list = NULL; 1147 1148 for (i = 0; i < argc - 1; i++) { 1149 free(suser); 1150 free(host); 1151 free(src); 1152 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1153 if (r == -1) { 1154 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1155 ++errs; 1156 continue; 1157 } 1158 if (r != 0) 1159 parse_user_host_path(argv[i], &suser, &host, &src); 1160 if (suser != NULL && !okname(suser)) { 1161 ++errs; 1162 continue; 1163 } 1164 if (!host) { /* Local to local. */ 1165 freeargs(&alist); 1166 addargs(&alist, "%s", _PATH_CP); 1167 if (iamrecursive) 1168 addargs(&alist, "-r"); 1169 if (pflag) 1170 addargs(&alist, "-p"); 1171 addargs(&alist, "--"); 1172 addargs(&alist, "%s", argv[i]); 1173 addargs(&alist, "%s", argv[argc-1]); 1174 if (do_local_cmd(&alist)) 1175 ++errs; 1176 continue; 1177 } 1178 /* Remote to local. */ 1179 if (mode == MODE_SFTP) { 1180 conn = do_sftp_connect(host, suser, sport, 1181 sftp_direct, &remin, &remout, &do_cmd_pid); 1182 if (conn == NULL) { 1183 error("Couldn't make sftp connection " 1184 "to server"); 1185 ++errs; 1186 continue; 1187 } 1188 1189 /* The protocol */ 1190 sink_sftp(1, argv[argc - 1], src, conn); 1191 1192 free(conn); 1193 (void) close(remin); 1194 (void) close(remout); 1195 remin = remout = -1; 1196 continue; 1197 } 1198 /* SCP */ 1199 xasprintf(&bp, "%s -f %s%s", 1200 cmd, *src == '-' ? "-- " : "", src); 1201 if (do_cmd(ssh_program, host, suser, sport, 0, bp, 1202 &remin, &remout, &do_cmd_pid) < 0) { 1203 free(bp); 1204 ++errs; 1205 continue; 1206 } 1207 free(bp); 1208 sink(1, argv + argc - 1, src); 1209 (void) close(remin); 1210 remin = remout = -1; 1211 } 1212 free(suser); 1213 free(host); 1214 free(src); 1215 } 1216 1217 /* Prepare remote path, handling ~ by assuming cwd is the homedir */ 1218 static char * 1219 prepare_remote_path(struct sftp_conn *conn, const char *path) 1220 { 1221 /* Handle ~ prefixed paths */ 1222 if (*path != '~') 1223 return xstrdup(path); 1224 if (*path == '\0' || strcmp(path, "~") == 0) 1225 return xstrdup("."); 1226 if (strncmp(path, "~/", 2) == 0) 1227 return xstrdup(path + 2); 1228 if (can_expand_path(conn)) 1229 return do_expand_path(conn, path); 1230 /* No protocol extension */ 1231 error("~user paths are not currently supported"); 1232 return NULL; 1233 } 1234 1235 void 1236 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) 1237 { 1238 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1239 int target_is_dir; 1240 1241 if ((filename = basename(src)) == NULL) 1242 fatal("basename %s: %s", src, strerror(errno)); 1243 1244 /* 1245 * No need to glob here - the local shell already took care of 1246 * the expansions 1247 */ 1248 if ((target = prepare_remote_path(conn, targ)) == NULL) 1249 cleanup_exit(255); 1250 target_is_dir = remote_is_dir(conn, target); 1251 if (targetshouldbedirectory && !target_is_dir) { 1252 fatal("Target is not a directory, but more files selected " 1253 "for upload"); 1254 } 1255 if (target_is_dir) 1256 abs_dst = path_append(target, filename); 1257 else { 1258 abs_dst = target; 1259 target = NULL; 1260 } 1261 debug3_f("copying local %s to remote %s", src, abs_dst); 1262 1263 if (local_is_dir(src) && iamrecursive) { 1264 if (upload_dir(conn, src, abs_dst, pflag, 1265 SFTP_PROGRESS_ONLY, 0, 0, 1) != 0) { 1266 fatal("failed to upload directory %s to %s", 1267 src, abs_dst); 1268 } 1269 } else if (do_upload(conn, src, abs_dst, pflag, 0, 0) != 0) 1270 fatal("failed to upload file %s to %s", src, abs_dst); 1271 1272 free(abs_dst); 1273 free(target); 1274 } 1275 1276 void 1277 source(int argc, char **argv) 1278 { 1279 struct stat stb; 1280 static BUF buffer; 1281 BUF *bp; 1282 off_t i, statbytes; 1283 size_t amt, nr; 1284 int fd = -1, haderr, indx; 1285 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1286 int len; 1287 1288 for (indx = 0; indx < argc; ++indx) { 1289 name = argv[indx]; 1290 statbytes = 0; 1291 len = strlen(name); 1292 while (len > 1 && name[len-1] == '/') 1293 name[--len] = '\0'; 1294 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) == -1) 1295 goto syserr; 1296 if (strchr(name, '\n') != NULL) { 1297 strnvis(encname, name, sizeof(encname), VIS_NL); 1298 name = encname; 1299 } 1300 if (fstat(fd, &stb) == -1) { 1301 syserr: run_err("%s: %s", name, strerror(errno)); 1302 goto next; 1303 } 1304 if (stb.st_size < 0) { 1305 run_err("%s: %s", name, "Negative file size"); 1306 goto next; 1307 } 1308 unset_nonblock(fd); 1309 switch (stb.st_mode & S_IFMT) { 1310 case S_IFREG: 1311 break; 1312 case S_IFDIR: 1313 if (iamrecursive) { 1314 rsource(name, &stb); 1315 goto next; 1316 } 1317 /* FALLTHROUGH */ 1318 default: 1319 run_err("%s: not a regular file", name); 1320 goto next; 1321 } 1322 if ((last = strrchr(name, '/')) == NULL) 1323 last = name; 1324 else 1325 ++last; 1326 curfile = last; 1327 if (pflag) { 1328 if (do_times(remout, verbose_mode, &stb) < 0) 1329 goto next; 1330 } 1331 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1332 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1333 (u_int) (stb.st_mode & FILEMODEMASK), 1334 (long long)stb.st_size, last); 1335 if (verbose_mode) 1336 fmprintf(stderr, "Sending file modes: %s", buf); 1337 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1338 if (response() < 0) 1339 goto next; 1340 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1341 next: if (fd != -1) { 1342 (void) close(fd); 1343 fd = -1; 1344 } 1345 continue; 1346 } 1347 if (showprogress) 1348 start_progress_meter(curfile, stb.st_size, &statbytes); 1349 set_nonblock(remout); 1350 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1351 amt = bp->cnt; 1352 if (i + (off_t)amt > stb.st_size) 1353 amt = stb.st_size - i; 1354 if (!haderr) { 1355 if ((nr = atomicio(read, fd, 1356 bp->buf, amt)) != amt) { 1357 haderr = errno; 1358 memset(bp->buf + nr, 0, amt - nr); 1359 } 1360 } 1361 /* Keep writing after error to retain sync */ 1362 if (haderr) { 1363 (void)atomicio(vwrite, remout, bp->buf, amt); 1364 memset(bp->buf, 0, amt); 1365 continue; 1366 } 1367 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1368 &statbytes) != amt) 1369 haderr = errno; 1370 } 1371 unset_nonblock(remout); 1372 1373 if (fd != -1) { 1374 if (close(fd) == -1 && !haderr) 1375 haderr = errno; 1376 fd = -1; 1377 } 1378 if (!haderr) 1379 (void) atomicio(vwrite, remout, "", 1); 1380 else 1381 run_err("%s: %s", name, strerror(haderr)); 1382 (void) response(); 1383 if (showprogress) 1384 stop_progress_meter(); 1385 } 1386 } 1387 1388 void 1389 rsource(char *name, struct stat *statp) 1390 { 1391 DIR *dirp; 1392 struct dirent *dp; 1393 char *last, *vect[1], path[PATH_MAX]; 1394 1395 if (!(dirp = opendir(name))) { 1396 run_err("%s: %s", name, strerror(errno)); 1397 return; 1398 } 1399 last = strrchr(name, '/'); 1400 if (last == NULL) 1401 last = name; 1402 else 1403 last++; 1404 if (pflag) { 1405 if (do_times(remout, verbose_mode, statp) < 0) { 1406 closedir(dirp); 1407 return; 1408 } 1409 } 1410 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1411 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1412 if (verbose_mode) 1413 fmprintf(stderr, "Entering directory: %s", path); 1414 (void) atomicio(vwrite, remout, path, strlen(path)); 1415 if (response() < 0) { 1416 closedir(dirp); 1417 return; 1418 } 1419 while ((dp = readdir(dirp)) != NULL) { 1420 if (dp->d_ino == 0) 1421 continue; 1422 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1423 continue; 1424 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 1425 run_err("%s/%s: name too long", name, dp->d_name); 1426 continue; 1427 } 1428 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 1429 vect[0] = path; 1430 source(1, vect); 1431 } 1432 (void) closedir(dirp); 1433 (void) atomicio(vwrite, remout, "E\n", 2); 1434 (void) response(); 1435 } 1436 1437 void 1438 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) 1439 { 1440 char *abs_src = NULL; 1441 char *abs_dst = NULL; 1442 glob_t g; 1443 char *filename, *tmp = NULL; 1444 int i, r, err = 0; 1445 1446 memset(&g, 0, sizeof(g)); 1447 /* 1448 * Here, we need remote glob as SFTP can not depend on remote shell 1449 * expansions 1450 */ 1451 1452 if ((abs_src = prepare_remote_path(conn, src)) == NULL) { 1453 err = -1; 1454 goto out; 1455 } 1456 1457 debug3_f("copying remote %s to local %s", abs_src, dst); 1458 if ((r = remote_glob(conn, abs_src, GLOB_MARK, NULL, &g)) != 0) { 1459 if (r == GLOB_NOSPACE) 1460 error("Too many glob matches for \"%s\".", abs_src); 1461 else 1462 error("File \"%s\" not found.", abs_src); 1463 err = -1; 1464 goto out; 1465 } 1466 1467 if (g.gl_matchc > 1 && !local_is_dir(dst)) { 1468 error("Multiple files match pattern, but destination " 1469 "\"%s\" is not a directory", dst); 1470 err = -1; 1471 goto out; 1472 } 1473 1474 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1475 tmp = xstrdup(g.gl_pathv[i]); 1476 if ((filename = basename(tmp)) == NULL) { 1477 error("basename %s: %s", tmp, strerror(errno)); 1478 err = -1; 1479 goto out; 1480 } 1481 1482 if (local_is_dir(dst)) 1483 abs_dst = path_append(dst, filename); 1484 else 1485 abs_dst = xstrdup(dst); 1486 1487 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1488 if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1489 if (download_dir(conn, g.gl_pathv[i], abs_dst, NULL, 1490 pflag, SFTP_PROGRESS_ONLY, 0, 0, 1) == -1) 1491 err = -1; 1492 } else { 1493 if (do_download(conn, g.gl_pathv[i], abs_dst, NULL, 1494 pflag, 0, 0) == -1) 1495 err = -1; 1496 } 1497 free(abs_dst); 1498 abs_dst = NULL; 1499 free(tmp); 1500 tmp = NULL; 1501 } 1502 1503 out: 1504 free(abs_src); 1505 free(tmp); 1506 globfree(&g); 1507 if (err == -1) { 1508 fatal("Failed to download file '%s'", src); 1509 } 1510 } 1511 1512 1513 #define TYPE_OVERFLOW(type, val) \ 1514 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1515 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1516 (sizeof(type) != 4 && sizeof(type) != 8)) 1517 1518 void 1519 sink(int argc, char **argv, const char *src) 1520 { 1521 static BUF buffer; 1522 struct stat stb; 1523 BUF *bp; 1524 off_t i; 1525 size_t j, count; 1526 int amt, exists, first, ofd; 1527 mode_t mode, omode, mask; 1528 off_t size, statbytes; 1529 unsigned long long ull; 1530 int setimes, targisdir, wrerr; 1531 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 1532 char **patterns = NULL; 1533 size_t n, npatterns = 0; 1534 struct timeval tv[2]; 1535 1536 #define atime tv[0] 1537 #define mtime tv[1] 1538 #define SCREWUP(str) { why = str; goto screwup; } 1539 1540 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1541 SCREWUP("Unexpected off_t/time_t size"); 1542 1543 setimes = targisdir = 0; 1544 mask = umask(0); 1545 if (!pflag) 1546 (void) umask(mask); 1547 if (argc != 1) { 1548 run_err("ambiguous target"); 1549 exit(1); 1550 } 1551 targ = *argv; 1552 if (targetshouldbedirectory) 1553 verifydir(targ); 1554 1555 (void) atomicio(vwrite, remout, "", 1); 1556 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1557 targisdir = 1; 1558 if (src != NULL && !iamrecursive && !Tflag) { 1559 /* 1560 * Prepare to try to restrict incoming filenames to match 1561 * the requested destination file glob. 1562 */ 1563 if (brace_expand(src, &patterns, &npatterns) != 0) 1564 fatal_f("could not expand pattern"); 1565 } 1566 for (first = 1;; first = 0) { 1567 cp = buf; 1568 if (atomicio(read, remin, cp, 1) != 1) 1569 goto done; 1570 if (*cp++ == '\n') 1571 SCREWUP("unexpected <newline>"); 1572 do { 1573 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1574 SCREWUP("lost connection"); 1575 *cp++ = ch; 1576 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1577 *cp = 0; 1578 if (verbose_mode) 1579 fmprintf(stderr, "Sink: %s", buf); 1580 1581 if (buf[0] == '\01' || buf[0] == '\02') { 1582 if (iamremote == 0) { 1583 (void) snmprintf(visbuf, sizeof(visbuf), 1584 NULL, "%s", buf + 1); 1585 (void) atomicio(vwrite, STDERR_FILENO, 1586 visbuf, strlen(visbuf)); 1587 } 1588 if (buf[0] == '\02') 1589 exit(1); 1590 ++errs; 1591 continue; 1592 } 1593 if (buf[0] == 'E') { 1594 (void) atomicio(vwrite, remout, "", 1); 1595 goto done; 1596 } 1597 if (ch == '\n') 1598 *--cp = 0; 1599 1600 cp = buf; 1601 if (*cp == 'T') { 1602 setimes++; 1603 cp++; 1604 if (!isdigit((unsigned char)*cp)) 1605 SCREWUP("mtime.sec not present"); 1606 ull = strtoull(cp, &cp, 10); 1607 if (!cp || *cp++ != ' ') 1608 SCREWUP("mtime.sec not delimited"); 1609 if (TYPE_OVERFLOW(time_t, ull)) 1610 setimes = 0; /* out of range */ 1611 mtime.tv_sec = ull; 1612 mtime.tv_usec = strtol(cp, &cp, 10); 1613 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1614 mtime.tv_usec > 999999) 1615 SCREWUP("mtime.usec not delimited"); 1616 if (!isdigit((unsigned char)*cp)) 1617 SCREWUP("atime.sec not present"); 1618 ull = strtoull(cp, &cp, 10); 1619 if (!cp || *cp++ != ' ') 1620 SCREWUP("atime.sec not delimited"); 1621 if (TYPE_OVERFLOW(time_t, ull)) 1622 setimes = 0; /* out of range */ 1623 atime.tv_sec = ull; 1624 atime.tv_usec = strtol(cp, &cp, 10); 1625 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1626 atime.tv_usec > 999999) 1627 SCREWUP("atime.usec not delimited"); 1628 (void) atomicio(vwrite, remout, "", 1); 1629 continue; 1630 } 1631 if (*cp != 'C' && *cp != 'D') { 1632 /* 1633 * Check for the case "rcp remote:foo\* local:bar". 1634 * In this case, the line "No match." can be returned 1635 * by the shell before the rcp command on the remote is 1636 * executed so the ^Aerror_message convention isn't 1637 * followed. 1638 */ 1639 if (first) { 1640 run_err("%s", cp); 1641 exit(1); 1642 } 1643 SCREWUP("expected control record"); 1644 } 1645 mode = 0; 1646 for (++cp; cp < buf + 5; cp++) { 1647 if (*cp < '0' || *cp > '7') 1648 SCREWUP("bad mode"); 1649 mode = (mode << 3) | (*cp - '0'); 1650 } 1651 if (!pflag) 1652 mode &= ~mask; 1653 if (*cp++ != ' ') 1654 SCREWUP("mode not delimited"); 1655 1656 if (!isdigit((unsigned char)*cp)) 1657 SCREWUP("size not present"); 1658 ull = strtoull(cp, &cp, 10); 1659 if (!cp || *cp++ != ' ') 1660 SCREWUP("size not delimited"); 1661 if (TYPE_OVERFLOW(off_t, ull)) 1662 SCREWUP("size out of range"); 1663 size = (off_t)ull; 1664 1665 if (*cp == '\0' || strchr(cp, '/') != NULL || 1666 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1667 run_err("error: unexpected filename: %s", cp); 1668 exit(1); 1669 } 1670 if (npatterns > 0) { 1671 for (n = 0; n < npatterns; n++) { 1672 if (fnmatch(patterns[n], cp, 0) == 0) 1673 break; 1674 } 1675 if (n >= npatterns) 1676 SCREWUP("filename does not match request"); 1677 } 1678 if (targisdir) { 1679 static char *namebuf; 1680 static size_t cursize; 1681 size_t need; 1682 1683 need = strlen(targ) + strlen(cp) + 250; 1684 if (need > cursize) { 1685 free(namebuf); 1686 namebuf = xmalloc(need); 1687 cursize = need; 1688 } 1689 (void) snprintf(namebuf, need, "%s%s%s", targ, 1690 strcmp(targ, "/") ? "/" : "", cp); 1691 np = namebuf; 1692 } else 1693 np = targ; 1694 curfile = cp; 1695 exists = stat(np, &stb) == 0; 1696 if (buf[0] == 'D') { 1697 int mod_flag = pflag; 1698 if (!iamrecursive) 1699 SCREWUP("received directory without -r"); 1700 if (exists) { 1701 if (!S_ISDIR(stb.st_mode)) { 1702 errno = ENOTDIR; 1703 goto bad; 1704 } 1705 if (pflag) 1706 (void) chmod(np, mode); 1707 } else { 1708 /* Handle copying from a read-only directory */ 1709 mod_flag = 1; 1710 if (mkdir(np, mode | S_IRWXU) == -1) 1711 goto bad; 1712 } 1713 vect[0] = xstrdup(np); 1714 sink(1, vect, src); 1715 if (setimes) { 1716 setimes = 0; 1717 (void) utimes(vect[0], tv); 1718 } 1719 if (mod_flag) 1720 (void) chmod(vect[0], mode); 1721 free(vect[0]); 1722 continue; 1723 } 1724 omode = mode; 1725 mode |= S_IWUSR; 1726 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1727 bad: run_err("%s: %s", np, strerror(errno)); 1728 continue; 1729 } 1730 (void) atomicio(vwrite, remout, "", 1); 1731 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1732 (void) close(ofd); 1733 continue; 1734 } 1735 cp = bp->buf; 1736 wrerr = 0; 1737 1738 /* 1739 * NB. do not use run_err() unless immediately followed by 1740 * exit() below as it may send a spurious reply that might 1741 * desyncronise us from the peer. Use note_err() instead. 1742 */ 1743 statbytes = 0; 1744 if (showprogress) 1745 start_progress_meter(curfile, size, &statbytes); 1746 set_nonblock(remin); 1747 for (count = i = 0; i < size; i += bp->cnt) { 1748 amt = bp->cnt; 1749 if (i + amt > size) 1750 amt = size - i; 1751 count += amt; 1752 do { 1753 j = atomicio6(read, remin, cp, amt, 1754 scpio, &statbytes); 1755 if (j == 0) { 1756 run_err("%s", j != EPIPE ? 1757 strerror(errno) : 1758 "dropped connection"); 1759 exit(1); 1760 } 1761 amt -= j; 1762 cp += j; 1763 } while (amt > 0); 1764 1765 if (count == bp->cnt) { 1766 /* Keep reading so we stay sync'd up. */ 1767 if (!wrerr) { 1768 if (atomicio(vwrite, ofd, bp->buf, 1769 count) != count) { 1770 note_err("%s: %s", np, 1771 strerror(errno)); 1772 wrerr = 1; 1773 } 1774 } 1775 count = 0; 1776 cp = bp->buf; 1777 } 1778 } 1779 unset_nonblock(remin); 1780 if (count != 0 && !wrerr && 1781 atomicio(vwrite, ofd, bp->buf, count) != count) { 1782 note_err("%s: %s", np, strerror(errno)); 1783 wrerr = 1; 1784 } 1785 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1786 ftruncate(ofd, size) != 0) 1787 note_err("%s: truncate: %s", np, strerror(errno)); 1788 if (pflag) { 1789 if (exists || omode != mode) 1790 if (fchmod(ofd, omode)) { 1791 note_err("%s: set mode: %s", 1792 np, strerror(errno)); 1793 } 1794 } else { 1795 if (!exists && omode != mode) 1796 if (fchmod(ofd, omode & ~mask)) { 1797 note_err("%s: set mode: %s", 1798 np, strerror(errno)); 1799 } 1800 } 1801 if (close(ofd) == -1) 1802 note_err("%s: close: %s", np, strerror(errno)); 1803 (void) response(); 1804 if (showprogress) 1805 stop_progress_meter(); 1806 if (setimes && !wrerr) { 1807 setimes = 0; 1808 if (utimes(np, tv) == -1) { 1809 note_err("%s: set times: %s", 1810 np, strerror(errno)); 1811 } 1812 } 1813 /* If no error was noted then signal success for this file */ 1814 if (note_err(NULL) == 0) 1815 (void) atomicio(vwrite, remout, "", 1); 1816 } 1817 done: 1818 for (n = 0; n < npatterns; n++) 1819 free(patterns[n]); 1820 free(patterns); 1821 return; 1822 screwup: 1823 for (n = 0; n < npatterns; n++) 1824 free(patterns[n]); 1825 free(patterns); 1826 run_err("protocol error: %s", why); 1827 exit(1); 1828 } 1829 1830 void 1831 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, 1832 char *src, char *targ) 1833 { 1834 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1835 char *abs_src = NULL, *tmp = NULL; 1836 glob_t g; 1837 int i, r, targetisdir, err = 0; 1838 1839 if ((filename = basename(src)) == NULL) 1840 fatal("basename %s: %s", src, strerror(errno)); 1841 1842 if ((abs_src = prepare_remote_path(from, src)) == NULL || 1843 (target = prepare_remote_path(to, targ)) == NULL) 1844 cleanup_exit(255); 1845 memset(&g, 0, sizeof(g)); 1846 1847 targetisdir = remote_is_dir(to, target); 1848 if (!targetisdir && targetshouldbedirectory) { 1849 error("Destination path \"%s\" is not a directory", target); 1850 err = -1; 1851 goto out; 1852 } 1853 1854 debug3_f("copying remote %s to remote %s", abs_src, target); 1855 if ((r = remote_glob(from, abs_src, GLOB_MARK, NULL, &g)) != 0) { 1856 if (r == GLOB_NOSPACE) 1857 error("Too many glob matches for \"%s\".", abs_src); 1858 else 1859 error("File \"%s\" not found.", abs_src); 1860 err = -1; 1861 goto out; 1862 } 1863 1864 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1865 tmp = xstrdup(g.gl_pathv[i]); 1866 if ((filename = basename(tmp)) == NULL) { 1867 error("basename %s: %s", tmp, strerror(errno)); 1868 err = -1; 1869 goto out; 1870 } 1871 1872 if (targetisdir) 1873 abs_dst = path_append(target, filename); 1874 else 1875 abs_dst = xstrdup(target); 1876 1877 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1878 if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1879 if (crossload_dir(from, to, g.gl_pathv[i], abs_dst, 1880 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) 1881 err = -1; 1882 } else { 1883 if (do_crossload(from, to, g.gl_pathv[i], abs_dst, NULL, 1884 pflag) == -1) 1885 err = -1; 1886 } 1887 free(abs_dst); 1888 abs_dst = NULL; 1889 free(tmp); 1890 tmp = NULL; 1891 } 1892 1893 out: 1894 free(abs_src); 1895 free(abs_dst); 1896 free(target); 1897 free(tmp); 1898 globfree(&g); 1899 if (err == -1) 1900 fatal("Failed to download file '%s'", src); 1901 } 1902 1903 int 1904 response(void) 1905 { 1906 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 1907 1908 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1909 lostconn(0); 1910 1911 cp = rbuf; 1912 switch (resp) { 1913 case 0: /* ok */ 1914 return (0); 1915 default: 1916 *cp++ = resp; 1917 /* FALLTHROUGH */ 1918 case 1: /* error, followed by error msg */ 1919 case 2: /* fatal error, "" */ 1920 do { 1921 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1922 lostconn(0); 1923 *cp++ = ch; 1924 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1925 1926 if (!iamremote) { 1927 cp[-1] = '\0'; 1928 (void) snmprintf(visbuf, sizeof(visbuf), 1929 NULL, "%s\n", rbuf); 1930 (void) atomicio(vwrite, STDERR_FILENO, 1931 visbuf, strlen(visbuf)); 1932 } 1933 ++errs; 1934 if (resp == 1) 1935 return (-1); 1936 exit(1); 1937 } 1938 /* NOTREACHED */ 1939 } 1940 1941 void 1942 usage(void) 1943 { 1944 (void) fprintf(stderr, 1945 "usage: scp [-346ABCOpqRrTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" 1946 " [-i identity_file] [-J destination] [-l limit]\n" 1947 " [-o ssh_option] [-P port] [-S program] source ... target\n"); 1948 exit(1); 1949 } 1950 1951 void 1952 run_err(const char *fmt,...) 1953 { 1954 static FILE *fp; 1955 va_list ap; 1956 1957 ++errs; 1958 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1959 (void) fprintf(fp, "%c", 0x01); 1960 (void) fprintf(fp, "scp: "); 1961 va_start(ap, fmt); 1962 (void) vfprintf(fp, fmt, ap); 1963 va_end(ap); 1964 (void) fprintf(fp, "\n"); 1965 (void) fflush(fp); 1966 } 1967 1968 if (!iamremote) { 1969 va_start(ap, fmt); 1970 vfmprintf(stderr, fmt, ap); 1971 va_end(ap); 1972 fprintf(stderr, "\n"); 1973 } 1974 } 1975 1976 /* 1977 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 1978 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 1979 * any active error at the end of the transfer. 1980 */ 1981 int 1982 note_err(const char *fmt, ...) 1983 { 1984 static char *emsg; 1985 va_list ap; 1986 1987 /* Replay any previously-noted error */ 1988 if (fmt == NULL) { 1989 if (emsg == NULL) 1990 return 0; 1991 run_err("%s", emsg); 1992 free(emsg); 1993 emsg = NULL; 1994 return -1; 1995 } 1996 1997 errs++; 1998 /* Prefer first-noted error */ 1999 if (emsg != NULL) 2000 return -1; 2001 2002 va_start(ap, fmt); 2003 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 2004 va_end(ap); 2005 return -1; 2006 } 2007 2008 void 2009 verifydir(char *cp) 2010 { 2011 struct stat stb; 2012 2013 if (!stat(cp, &stb)) { 2014 if (S_ISDIR(stb.st_mode)) 2015 return; 2016 errno = ENOTDIR; 2017 } 2018 run_err("%s: %s", cp, strerror(errno)); 2019 killchild(0); 2020 } 2021 2022 int 2023 okname(char *cp0) 2024 { 2025 int c; 2026 char *cp; 2027 2028 cp = cp0; 2029 do { 2030 c = (int)*cp; 2031 if (c & 0200) 2032 goto bad; 2033 if (!isalpha(c) && !isdigit((unsigned char)c)) { 2034 switch (c) { 2035 case '\'': 2036 case '"': 2037 case '`': 2038 case ' ': 2039 case '#': 2040 goto bad; 2041 default: 2042 break; 2043 } 2044 } 2045 } while (*++cp); 2046 return (1); 2047 2048 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 2049 return (0); 2050 } 2051 2052 BUF * 2053 allocbuf(BUF *bp, int fd, int blksize) 2054 { 2055 size_t size; 2056 struct stat stb; 2057 2058 if (fstat(fd, &stb) == -1) { 2059 run_err("fstat: %s", strerror(errno)); 2060 return (0); 2061 } 2062 size = ROUNDUP(stb.st_blksize, blksize); 2063 if (size == 0) 2064 size = blksize; 2065 if (bp->cnt >= size) 2066 return (bp); 2067 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 2068 bp->cnt = size; 2069 return (bp); 2070 } 2071 2072 void 2073 lostconn(int signo) 2074 { 2075 if (!iamremote) 2076 (void)write(STDERR_FILENO, "lost connection\n", 16); 2077 if (signo) 2078 _exit(1); 2079 else 2080 exit(1); 2081 } 2082 2083 void 2084 cleanup_exit(int i) 2085 { 2086 if (remin > 0) 2087 close(remin); 2088 if (remout > 0) 2089 close(remout); 2090 if (remin2 > 0) 2091 close(remin2); 2092 if (remout2 > 0) 2093 close(remout2); 2094 if (do_cmd_pid > 0) 2095 waitpid(do_cmd_pid, NULL, 0); 2096 if (do_cmd_pid2 > 0) 2097 waitpid(do_cmd_pid2, NULL, 0); 2098 exit(i); 2099 } 2100