1 /* $OpenBSD: scp.c,v 1.251 2022/12/16 06:52:48 jmc 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 <util.h> 100 #include <vis.h> 101 102 #include "xmalloc.h" 103 #include "ssh.h" 104 #include "atomicio.h" 105 #include "pathnames.h" 106 #include "log.h" 107 #include "misc.h" 108 #include "progressmeter.h" 109 #include "utf8.h" 110 #include "sftp.h" 111 112 #include "sftp-common.h" 113 #include "sftp-client.h" 114 115 #define COPY_BUFLEN 16384 116 117 int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *); 118 int do_cmd2(char *, char *, int, char *, int, int); 119 120 /* Struct for addargs */ 121 arglist args; 122 arglist remote_remote_args; 123 124 /* Bandwidth limit */ 125 long long limit_kbps = 0; 126 struct bwlimit bwlimit; 127 128 /* Name of current file being transferred. */ 129 char *curfile; 130 131 /* This is set to non-zero to enable verbose mode. */ 132 int verbose_mode = 0; 133 LogLevel log_level = SYSLOG_LEVEL_INFO; 134 135 /* This is set to zero if the progressmeter is not desired. */ 136 int showprogress = 1; 137 138 /* 139 * This is set to non-zero if remote-remote copy should be piped 140 * through this process. 141 */ 142 int throughlocal = 1; 143 144 /* Non-standard port to use for the ssh connection or -1. */ 145 int sshport = -1; 146 147 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 148 char *ssh_program = _PATH_SSH_PROGRAM; 149 150 /* This is used to store the pid of ssh_program */ 151 pid_t do_cmd_pid = -1; 152 pid_t do_cmd_pid2 = -1; 153 154 /* SFTP copy parameters */ 155 size_t sftp_copy_buflen; 156 size_t sftp_nrequests; 157 158 /* Needed for sftp */ 159 volatile sig_atomic_t interrupted = 0; 160 161 int remote_glob(struct sftp_conn *, const char *, int, 162 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ 163 164 static void 165 killchild(int signo) 166 { 167 if (do_cmd_pid > 1) { 168 kill(do_cmd_pid, signo ? signo : SIGTERM); 169 waitpid(do_cmd_pid, NULL, 0); 170 } 171 if (do_cmd_pid2 > 1) { 172 kill(do_cmd_pid2, signo ? signo : SIGTERM); 173 waitpid(do_cmd_pid2, NULL, 0); 174 } 175 176 if (signo) 177 _exit(1); 178 exit(1); 179 } 180 181 static void 182 suspone(int pid, int signo) 183 { 184 int status; 185 186 if (pid > 1) { 187 kill(pid, signo); 188 while (waitpid(pid, &status, WUNTRACED) == -1 && 189 errno == EINTR) 190 ; 191 } 192 } 193 194 static void 195 suspchild(int signo) 196 { 197 suspone(do_cmd_pid, signo); 198 suspone(do_cmd_pid2, signo); 199 kill(getpid(), SIGSTOP); 200 } 201 202 static int 203 do_local_cmd(arglist *a) 204 { 205 u_int i; 206 int status; 207 pid_t pid; 208 209 if (a->num == 0) 210 fatal("do_local_cmd: no arguments"); 211 212 if (verbose_mode) { 213 fprintf(stderr, "Executing:"); 214 for (i = 0; i < a->num; i++) 215 fmprintf(stderr, " %s", a->list[i]); 216 fprintf(stderr, "\n"); 217 } 218 if ((pid = fork()) == -1) 219 fatal("do_local_cmd: fork: %s", strerror(errno)); 220 221 if (pid == 0) { 222 execvp(a->list[0], a->list); 223 perror(a->list[0]); 224 exit(1); 225 } 226 227 do_cmd_pid = pid; 228 ssh_signal(SIGTERM, killchild); 229 ssh_signal(SIGINT, killchild); 230 ssh_signal(SIGHUP, killchild); 231 232 while (waitpid(pid, &status, 0) == -1) 233 if (errno != EINTR) 234 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 235 236 do_cmd_pid = -1; 237 238 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 239 return (-1); 240 241 return (0); 242 } 243 244 /* 245 * This function executes the given command as the specified user on the 246 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 247 * assigns the input and output file descriptors on success. 248 */ 249 250 int 251 do_cmd(char *program, char *host, char *remuser, int port, int subsystem, 252 char *cmd, int *fdin, int *fdout, pid_t *pid) 253 { 254 int pin[2], pout[2], reserved[2]; 255 256 if (verbose_mode) 257 fmprintf(stderr, 258 "Executing: program %s host %s, user %s, command %s\n", 259 program, host, 260 remuser ? remuser : "(unspecified)", cmd); 261 262 if (port == -1) 263 port = sshport; 264 265 /* 266 * Reserve two descriptors so that the real pipes won't get 267 * descriptors 0 and 1 because that will screw up dup2 below. 268 */ 269 if (pipe(reserved) == -1) 270 fatal("pipe: %s", strerror(errno)); 271 272 /* Create a socket pair for communicating with ssh. */ 273 if (pipe(pin) == -1) 274 fatal("pipe: %s", strerror(errno)); 275 if (pipe(pout) == -1) 276 fatal("pipe: %s", strerror(errno)); 277 278 /* Free the reserved descriptors. */ 279 close(reserved[0]); 280 close(reserved[1]); 281 282 ssh_signal(SIGTSTP, suspchild); 283 ssh_signal(SIGTTIN, suspchild); 284 ssh_signal(SIGTTOU, suspchild); 285 286 /* Fork a child to execute the command on the remote host using ssh. */ 287 *pid = fork(); 288 if (*pid == 0) { 289 /* Child. */ 290 close(pin[1]); 291 close(pout[0]); 292 dup2(pin[0], 0); 293 dup2(pout[1], 1); 294 close(pin[0]); 295 close(pout[1]); 296 297 replacearg(&args, 0, "%s", program); 298 if (port != -1) { 299 addargs(&args, "-p"); 300 addargs(&args, "%d", port); 301 } 302 if (remuser != NULL) { 303 addargs(&args, "-l"); 304 addargs(&args, "%s", remuser); 305 } 306 if (subsystem) 307 addargs(&args, "-s"); 308 addargs(&args, "--"); 309 addargs(&args, "%s", host); 310 addargs(&args, "%s", cmd); 311 312 execvp(program, args.list); 313 perror(program); 314 exit(1); 315 } else if (*pid == -1) { 316 fatal("fork: %s", strerror(errno)); 317 } 318 /* Parent. Close the other side, and return the local side. */ 319 close(pin[0]); 320 *fdout = pin[1]; 321 close(pout[1]); 322 *fdin = pout[0]; 323 ssh_signal(SIGTERM, killchild); 324 ssh_signal(SIGINT, killchild); 325 ssh_signal(SIGHUP, killchild); 326 return 0; 327 } 328 329 /* 330 * This function executes a command similar to do_cmd(), but expects the 331 * input and output descriptors to be setup by a previous call to do_cmd(). 332 * This way the input and output of two commands can be connected. 333 */ 334 int 335 do_cmd2(char *host, char *remuser, int port, char *cmd, 336 int fdin, int fdout) 337 { 338 int status; 339 pid_t pid; 340 341 if (verbose_mode) 342 fmprintf(stderr, 343 "Executing: 2nd program %s host %s, user %s, command %s\n", 344 ssh_program, host, 345 remuser ? remuser : "(unspecified)", cmd); 346 347 if (port == -1) 348 port = sshport; 349 350 /* Fork a child to execute the command on the remote host using ssh. */ 351 pid = fork(); 352 if (pid == 0) { 353 dup2(fdin, 0); 354 dup2(fdout, 1); 355 356 replacearg(&args, 0, "%s", ssh_program); 357 if (port != -1) { 358 addargs(&args, "-p"); 359 addargs(&args, "%d", port); 360 } 361 if (remuser != NULL) { 362 addargs(&args, "-l"); 363 addargs(&args, "%s", remuser); 364 } 365 addargs(&args, "-oBatchMode=yes"); 366 addargs(&args, "--"); 367 addargs(&args, "%s", host); 368 addargs(&args, "%s", cmd); 369 370 execvp(ssh_program, args.list); 371 perror(ssh_program); 372 exit(1); 373 } else if (pid == -1) { 374 fatal("fork: %s", strerror(errno)); 375 } 376 while (waitpid(pid, &status, 0) == -1) 377 if (errno != EINTR) 378 fatal("do_cmd2: waitpid: %s", strerror(errno)); 379 return 0; 380 } 381 382 typedef struct { 383 size_t cnt; 384 char *buf; 385 } BUF; 386 387 BUF *allocbuf(BUF *, int, int); 388 void lostconn(int); 389 int okname(char *); 390 void run_err(const char *,...) 391 __attribute__((__format__ (printf, 1, 2))) 392 __attribute__((__nonnull__ (1))); 393 int note_err(const char *,...) 394 __attribute__((__format__ (printf, 1, 2))); 395 void verifydir(char *); 396 397 struct passwd *pwd; 398 uid_t userid; 399 int errs, remin, remout, remin2, remout2; 400 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 401 402 #define CMDNEEDS 64 403 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 404 405 enum scp_mode_e { 406 MODE_SCP, 407 MODE_SFTP 408 }; 409 410 int response(void); 411 void rsource(char *, struct stat *); 412 void sink(int, char *[], const char *); 413 void source(int, char *[]); 414 void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); 415 void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); 416 void usage(void); 417 418 void source_sftp(int, char *, char *, struct sftp_conn *); 419 void sink_sftp(int, char *, const char *, struct sftp_conn *); 420 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, 421 char *, char *); 422 423 int 424 main(int argc, char **argv) 425 { 426 int ch, fflag, tflag, status, r, n; 427 char **newargv, *argv0; 428 const char *errstr; 429 extern char *optarg; 430 extern int optind; 431 enum scp_mode_e mode = MODE_SFTP; 432 char *sftp_direct = NULL; 433 long long llv; 434 435 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 436 sanitise_stdfd(); 437 438 setlocale(LC_CTYPE, ""); 439 440 /* Copy argv, because we modify it */ 441 argv0 = argv[0]; 442 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 443 for (n = 0; n < argc; n++) 444 newargv[n] = xstrdup(argv[n]); 445 argv = newargv; 446 447 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 448 449 memset(&args, '\0', sizeof(args)); 450 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 451 args.list = remote_remote_args.list = NULL; 452 addargs(&args, "%s", ssh_program); 453 addargs(&args, "-x"); 454 addargs(&args, "-oPermitLocalCommand=no"); 455 addargs(&args, "-oClearAllForwardings=yes"); 456 addargs(&args, "-oRemoteCommand=none"); 457 addargs(&args, "-oRequestTTY=no"); 458 459 fflag = Tflag = tflag = 0; 460 while ((ch = getopt(argc, argv, 461 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) { 462 switch (ch) { 463 /* User-visible flags. */ 464 case '1': 465 fatal("SSH protocol v.1 is no longer supported"); 466 break; 467 case '2': 468 /* Ignored */ 469 break; 470 case 'A': 471 case '4': 472 case '6': 473 case 'C': 474 addargs(&args, "-%c", ch); 475 addargs(&remote_remote_args, "-%c", ch); 476 break; 477 case 'D': 478 sftp_direct = optarg; 479 break; 480 case '3': 481 throughlocal = 1; 482 break; 483 case 'R': 484 throughlocal = 0; 485 break; 486 case 'o': 487 case 'c': 488 case 'i': 489 case 'F': 490 case 'J': 491 addargs(&remote_remote_args, "-%c", ch); 492 addargs(&remote_remote_args, "%s", optarg); 493 addargs(&args, "-%c", ch); 494 addargs(&args, "%s", optarg); 495 break; 496 case 'O': 497 mode = MODE_SCP; 498 break; 499 case 's': 500 mode = MODE_SFTP; 501 break; 502 case 'P': 503 sshport = a2port(optarg); 504 if (sshport <= 0) 505 fatal("bad port \"%s\"\n", optarg); 506 break; 507 case 'B': 508 addargs(&remote_remote_args, "-oBatchmode=yes"); 509 addargs(&args, "-oBatchmode=yes"); 510 break; 511 case 'l': 512 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 513 &errstr); 514 if (errstr != NULL) 515 usage(); 516 limit_kbps *= 1024; /* kbps */ 517 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 518 break; 519 case 'p': 520 pflag = 1; 521 break; 522 case 'r': 523 iamrecursive = 1; 524 break; 525 case 'S': 526 ssh_program = xstrdup(optarg); 527 break; 528 case 'v': 529 addargs(&args, "-v"); 530 addargs(&remote_remote_args, "-v"); 531 if (verbose_mode == 0) 532 log_level = SYSLOG_LEVEL_DEBUG1; 533 else if (log_level < SYSLOG_LEVEL_DEBUG3) 534 log_level++; 535 verbose_mode = 1; 536 break; 537 case 'q': 538 addargs(&args, "-q"); 539 addargs(&remote_remote_args, "-q"); 540 showprogress = 0; 541 break; 542 case 'X': 543 /* Please keep in sync with sftp.c -X */ 544 if (strncmp(optarg, "buffer=", 7) == 0) { 545 r = scan_scaled(optarg + 7, &llv); 546 if (r == 0 && (llv <= 0 || llv > 256 * 1024)) { 547 r = -1; 548 errno = EINVAL; 549 } 550 if (r == -1) { 551 fatal("Invalid buffer size \"%s\": %s", 552 optarg + 7, strerror(errno)); 553 } 554 sftp_copy_buflen = (size_t)llv; 555 } else if (strncmp(optarg, "nrequests=", 10) == 0) { 556 llv = strtonum(optarg + 10, 1, 256 * 1024, 557 &errstr); 558 if (errstr != NULL) { 559 fatal("Invalid number of requests " 560 "\"%s\": %s", optarg + 10, errstr); 561 } 562 sftp_nrequests = (size_t)llv; 563 } else { 564 fatal("Invalid -X option"); 565 } 566 break; 567 568 /* Server options. */ 569 case 'd': 570 targetshouldbedirectory = 1; 571 break; 572 case 'f': /* "from" */ 573 iamremote = 1; 574 fflag = 1; 575 break; 576 case 't': /* "to" */ 577 iamremote = 1; 578 tflag = 1; 579 break; 580 case 'T': 581 Tflag = 1; 582 break; 583 default: 584 usage(); 585 } 586 } 587 argc -= optind; 588 argv += optind; 589 590 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 591 592 /* Do this last because we want the user to be able to override it */ 593 addargs(&args, "-oForwardAgent=no"); 594 595 if (iamremote) 596 mode = MODE_SCP; 597 598 if ((pwd = getpwuid(userid = getuid())) == NULL) 599 fatal("unknown user %u", (u_int) userid); 600 601 if (!isatty(STDOUT_FILENO)) 602 showprogress = 0; 603 604 if (pflag) { 605 /* Cannot pledge: -p allows setuid/setgid files... */ 606 } else { 607 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 608 NULL) == -1) { 609 perror("pledge"); 610 exit(1); 611 } 612 } 613 614 remin = STDIN_FILENO; 615 remout = STDOUT_FILENO; 616 617 if (fflag) { 618 /* Follow "protocol", send data. */ 619 (void) response(); 620 source(argc, argv); 621 exit(errs != 0); 622 } 623 if (tflag) { 624 /* Receive data. */ 625 sink(argc, argv, NULL); 626 exit(errs != 0); 627 } 628 if (argc < 2) 629 usage(); 630 if (argc > 2) 631 targetshouldbedirectory = 1; 632 633 remin = remout = -1; 634 do_cmd_pid = -1; 635 /* Command to be executed on remote system using "ssh". */ 636 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 637 verbose_mode ? " -v" : "", 638 iamrecursive ? " -r" : "", pflag ? " -p" : "", 639 targetshouldbedirectory ? " -d" : ""); 640 641 (void) ssh_signal(SIGPIPE, lostconn); 642 643 if (colon(argv[argc - 1])) /* Dest is remote host. */ 644 toremote(argc, argv, mode, sftp_direct); 645 else { 646 if (targetshouldbedirectory) 647 verifydir(argv[argc - 1]); 648 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */ 649 } 650 /* 651 * Finally check the exit status of the ssh process, if one was forked 652 * and no error has occurred yet 653 */ 654 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) { 655 if (remin != -1) 656 (void) close(remin); 657 if (remout != -1) 658 (void) close(remout); 659 if (waitpid(do_cmd_pid, &status, 0) == -1) 660 errs = 1; 661 else { 662 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 663 errs = 1; 664 } 665 } 666 exit(errs != 0); 667 } 668 669 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 670 static int 671 scpio(void *_cnt, size_t s) 672 { 673 off_t *cnt = (off_t *)_cnt; 674 675 *cnt += s; 676 refresh_progress_meter(0); 677 if (limit_kbps > 0) 678 bandwidth_limit(&bwlimit, s); 679 return 0; 680 } 681 682 static int 683 do_times(int fd, int verb, const struct stat *sb) 684 { 685 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 686 char buf[(20 + 7 + 2) * 2 + 2]; 687 688 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 689 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 690 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 691 if (verb) { 692 fprintf(stderr, "File mtime %lld atime %lld\n", 693 (long long)sb->st_mtime, (long long)sb->st_atime); 694 fprintf(stderr, "Sending file timestamps: %s", buf); 695 } 696 (void) atomicio(vwrite, fd, buf, strlen(buf)); 697 return (response()); 698 } 699 700 static int 701 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 702 char **pathp) 703 { 704 int r; 705 706 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 707 if (r == 0 && *pathp == NULL) 708 *pathp = xstrdup("."); 709 return r; 710 } 711 712 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 713 static int 714 append(char *cp, char ***ap, size_t *np) 715 { 716 char **tmp; 717 718 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 719 return -1; 720 tmp[(*np)] = cp; 721 (*np)++; 722 *ap = tmp; 723 return 0; 724 } 725 726 /* 727 * Finds the start and end of the first brace pair in the pattern. 728 * returns 0 on success or -1 for invalid patterns. 729 */ 730 static int 731 find_brace(const char *pattern, int *startp, int *endp) 732 { 733 int i; 734 int in_bracket, brace_level; 735 736 *startp = *endp = -1; 737 in_bracket = brace_level = 0; 738 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 739 switch (pattern[i]) { 740 case '\\': 741 /* skip next character */ 742 if (pattern[i + 1] != '\0') 743 i++; 744 break; 745 case '[': 746 in_bracket = 1; 747 break; 748 case ']': 749 in_bracket = 0; 750 break; 751 case '{': 752 if (in_bracket) 753 break; 754 if (pattern[i + 1] == '}') { 755 /* Protect a single {}, for find(1), like csh */ 756 i++; /* skip */ 757 break; 758 } 759 if (*startp == -1) 760 *startp = i; 761 brace_level++; 762 break; 763 case '}': 764 if (in_bracket) 765 break; 766 if (*startp < 0) { 767 /* Unbalanced brace */ 768 return -1; 769 } 770 if (--brace_level <= 0) 771 *endp = i; 772 break; 773 } 774 } 775 /* unbalanced brackets/braces */ 776 if (*endp < 0 && (*startp >= 0 || in_bracket)) 777 return -1; 778 return 0; 779 } 780 781 /* 782 * Assembles and records a successfully-expanded pattern, returns -1 on 783 * alloc failure. 784 */ 785 static int 786 emit_expansion(const char *pattern, int brace_start, int brace_end, 787 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 788 { 789 char *cp; 790 int o = 0, tail_len = strlen(pattern + brace_end + 1); 791 792 if ((cp = malloc(brace_start + (sel_end - sel_start) + 793 tail_len + 1)) == NULL) 794 return -1; 795 796 /* Pattern before initial brace */ 797 if (brace_start > 0) { 798 memcpy(cp, pattern, brace_start); 799 o = brace_start; 800 } 801 /* Current braced selection */ 802 if (sel_end - sel_start > 0) { 803 memcpy(cp + o, pattern + sel_start, 804 sel_end - sel_start); 805 o += sel_end - sel_start; 806 } 807 /* Remainder of pattern after closing brace */ 808 if (tail_len > 0) { 809 memcpy(cp + o, pattern + brace_end + 1, tail_len); 810 o += tail_len; 811 } 812 cp[o] = '\0'; 813 if (append(cp, patternsp, npatternsp) != 0) { 814 free(cp); 815 return -1; 816 } 817 return 0; 818 } 819 820 /* 821 * Expand the first encountered brace in pattern, appending the expanded 822 * patterns it yielded to the *patternsp array. 823 * 824 * Returns 0 on success or -1 on allocation failure. 825 * 826 * Signals whether expansion was performed via *expanded and whether 827 * pattern was invalid via *invalid. 828 */ 829 static int 830 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 831 int *expanded, int *invalid) 832 { 833 int i; 834 int in_bracket, brace_start, brace_end, brace_level; 835 int sel_start, sel_end; 836 837 *invalid = *expanded = 0; 838 839 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 840 *invalid = 1; 841 return 0; 842 } else if (brace_start == -1) 843 return 0; 844 845 in_bracket = brace_level = 0; 846 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 847 switch (pattern[i]) { 848 case '{': 849 if (in_bracket) 850 break; 851 brace_level++; 852 break; 853 case '}': 854 if (in_bracket) 855 break; 856 brace_level--; 857 break; 858 case '[': 859 in_bracket = 1; 860 break; 861 case ']': 862 in_bracket = 0; 863 break; 864 case '\\': 865 if (i < brace_end - 1) 866 i++; /* skip */ 867 break; 868 } 869 if (pattern[i] == ',' || i == brace_end - 1) { 870 if (in_bracket || brace_level > 0) 871 continue; 872 /* End of a selection, emit an expanded pattern */ 873 874 /* Adjust end index for last selection */ 875 sel_end = (i == brace_end - 1) ? brace_end : i; 876 if (emit_expansion(pattern, brace_start, brace_end, 877 sel_start, sel_end, patternsp, npatternsp) != 0) 878 return -1; 879 /* move on to the next selection */ 880 sel_start = i + 1; 881 continue; 882 } 883 } 884 if (in_bracket || brace_level > 0) { 885 *invalid = 1; 886 return 0; 887 } 888 /* success */ 889 *expanded = 1; 890 return 0; 891 } 892 893 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 894 static int 895 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 896 { 897 char *cp, *cp2, **active = NULL, **done = NULL; 898 size_t i, nactive = 0, ndone = 0; 899 int ret = -1, invalid = 0, expanded = 0; 900 901 *patternsp = NULL; 902 *npatternsp = 0; 903 904 /* Start the worklist with the original pattern */ 905 if ((cp = strdup(pattern)) == NULL) 906 return -1; 907 if (append(cp, &active, &nactive) != 0) { 908 free(cp); 909 return -1; 910 } 911 while (nactive > 0) { 912 cp = active[nactive - 1]; 913 nactive--; 914 if (brace_expand_one(cp, &active, &nactive, 915 &expanded, &invalid) == -1) { 916 free(cp); 917 goto fail; 918 } 919 if (invalid) 920 fatal_f("invalid brace pattern \"%s\"", cp); 921 if (expanded) { 922 /* 923 * Current entry expanded to new entries on the 924 * active list; discard the progenitor pattern. 925 */ 926 free(cp); 927 continue; 928 } 929 /* 930 * Pattern did not expand; append the finename component to 931 * the completed list 932 */ 933 if ((cp2 = strrchr(cp, '/')) != NULL) 934 *cp2++ = '\0'; 935 else 936 cp2 = cp; 937 if (append(xstrdup(cp2), &done, &ndone) != 0) { 938 free(cp); 939 goto fail; 940 } 941 free(cp); 942 } 943 /* success */ 944 *patternsp = done; 945 *npatternsp = ndone; 946 done = NULL; 947 ndone = 0; 948 ret = 0; 949 fail: 950 for (i = 0; i < nactive; i++) 951 free(active[i]); 952 free(active); 953 for (i = 0; i < ndone; i++) 954 free(done[i]); 955 free(done); 956 return ret; 957 } 958 959 static struct sftp_conn * 960 do_sftp_connect(char *host, char *user, int port, char *sftp_direct, 961 int *reminp, int *remoutp, int *pidp) 962 { 963 if (sftp_direct == NULL) { 964 if (do_cmd(ssh_program, host, user, port, 1, "sftp", 965 reminp, remoutp, pidp) < 0) 966 return NULL; 967 968 } else { 969 freeargs(&args); 970 addargs(&args, "sftp-server"); 971 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", 972 reminp, remoutp, pidp) < 0) 973 return NULL; 974 } 975 return do_init(*reminp, *remoutp, 976 sftp_copy_buflen, sftp_nrequests, limit_kbps); 977 } 978 979 void 980 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 981 { 982 char *suser = NULL, *host = NULL, *src = NULL; 983 char *bp, *tuser, *thost, *targ; 984 int sport = -1, tport = -1; 985 struct sftp_conn *conn = NULL, *conn2 = NULL; 986 arglist alist; 987 int i, r, status; 988 u_int j; 989 990 memset(&alist, '\0', sizeof(alist)); 991 alist.list = NULL; 992 993 /* Parse target */ 994 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 995 if (r == -1) { 996 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 997 ++errs; 998 goto out; 999 } 1000 if (r != 0) { 1001 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 1002 &targ) == -1) { 1003 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 1004 ++errs; 1005 goto out; 1006 } 1007 } 1008 1009 /* Parse source files */ 1010 for (i = 0; i < argc - 1; i++) { 1011 free(suser); 1012 free(host); 1013 free(src); 1014 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1015 if (r == -1) { 1016 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1017 ++errs; 1018 continue; 1019 } 1020 if (r != 0) { 1021 parse_user_host_path(argv[i], &suser, &host, &src); 1022 } 1023 if (suser != NULL && !okname(suser)) { 1024 ++errs; 1025 continue; 1026 } 1027 if (host && throughlocal) { /* extended remote to remote */ 1028 if (mode == MODE_SFTP) { 1029 if (remin == -1) { 1030 /* Connect to dest now */ 1031 conn = do_sftp_connect(thost, tuser, 1032 tport, sftp_direct, 1033 &remin, &remout, &do_cmd_pid); 1034 if (conn == NULL) { 1035 fatal("Unable to open " 1036 "destination connection"); 1037 } 1038 debug3_f("origin in %d out %d pid %ld", 1039 remin, remout, (long)do_cmd_pid); 1040 } 1041 /* 1042 * XXX remember suser/host/sport and only 1043 * reconnect if they change between arguments. 1044 * would save reconnections for cases like 1045 * scp -3 hosta:/foo hosta:/bar hostb: 1046 */ 1047 /* Connect to origin now */ 1048 conn2 = do_sftp_connect(host, suser, 1049 sport, sftp_direct, 1050 &remin2, &remout2, &do_cmd_pid2); 1051 if (conn2 == NULL) { 1052 fatal("Unable to open " 1053 "source connection"); 1054 } 1055 debug3_f("destination in %d out %d pid %ld", 1056 remin2, remout2, (long)do_cmd_pid2); 1057 throughlocal_sftp(conn2, conn, src, targ); 1058 (void) close(remin2); 1059 (void) close(remout2); 1060 remin2 = remout2 = -1; 1061 if (waitpid(do_cmd_pid2, &status, 0) == -1) 1062 ++errs; 1063 else if (!WIFEXITED(status) || 1064 WEXITSTATUS(status) != 0) 1065 ++errs; 1066 do_cmd_pid2 = -1; 1067 continue; 1068 } else { 1069 xasprintf(&bp, "%s -f %s%s", cmd, 1070 *src == '-' ? "-- " : "", src); 1071 if (do_cmd(ssh_program, host, suser, sport, 0, 1072 bp, &remin, &remout, &do_cmd_pid) < 0) 1073 exit(1); 1074 free(bp); 1075 xasprintf(&bp, "%s -t %s%s", cmd, 1076 *targ == '-' ? "-- " : "", targ); 1077 if (do_cmd2(thost, tuser, tport, bp, 1078 remin, remout) < 0) 1079 exit(1); 1080 free(bp); 1081 (void) close(remin); 1082 (void) close(remout); 1083 remin = remout = -1; 1084 } 1085 } else if (host) { /* standard remote to remote */ 1086 /* 1087 * Second remote user is passed to first remote side 1088 * via scp command-line. Ensure it contains no obvious 1089 * shell characters. 1090 */ 1091 if (tuser != NULL && !okname(tuser)) { 1092 ++errs; 1093 continue; 1094 } 1095 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 1096 /* This would require the remote support URIs */ 1097 fatal("target port not supported with two " 1098 "remote hosts and the -R option"); 1099 } 1100 1101 freeargs(&alist); 1102 addargs(&alist, "%s", ssh_program); 1103 addargs(&alist, "-x"); 1104 addargs(&alist, "-oClearAllForwardings=yes"); 1105 addargs(&alist, "-n"); 1106 for (j = 0; j < remote_remote_args.num; j++) { 1107 addargs(&alist, "%s", 1108 remote_remote_args.list[j]); 1109 } 1110 1111 if (sport != -1) { 1112 addargs(&alist, "-p"); 1113 addargs(&alist, "%d", sport); 1114 } 1115 if (suser) { 1116 addargs(&alist, "-l"); 1117 addargs(&alist, "%s", suser); 1118 } 1119 addargs(&alist, "--"); 1120 addargs(&alist, "%s", host); 1121 addargs(&alist, "%s", cmd); 1122 addargs(&alist, "%s", src); 1123 addargs(&alist, "%s%s%s:%s", 1124 tuser ? tuser : "", tuser ? "@" : "", 1125 thost, targ); 1126 if (do_local_cmd(&alist) != 0) 1127 errs = 1; 1128 } else { /* local to remote */ 1129 if (mode == MODE_SFTP) { 1130 if (remin == -1) { 1131 /* Connect to remote now */ 1132 conn = do_sftp_connect(thost, tuser, 1133 tport, sftp_direct, 1134 &remin, &remout, &do_cmd_pid); 1135 if (conn == NULL) { 1136 fatal("Unable to open sftp " 1137 "connection"); 1138 } 1139 } 1140 1141 /* The protocol */ 1142 source_sftp(1, argv[i], targ, conn); 1143 continue; 1144 } 1145 /* SCP */ 1146 if (remin == -1) { 1147 xasprintf(&bp, "%s -t %s%s", cmd, 1148 *targ == '-' ? "-- " : "", targ); 1149 if (do_cmd(ssh_program, thost, tuser, tport, 0, 1150 bp, &remin, &remout, &do_cmd_pid) < 0) 1151 exit(1); 1152 if (response() < 0) 1153 exit(1); 1154 free(bp); 1155 } 1156 source(1, argv + i); 1157 } 1158 } 1159 out: 1160 if (mode == MODE_SFTP) 1161 free(conn); 1162 free(tuser); 1163 free(thost); 1164 free(targ); 1165 free(suser); 1166 free(host); 1167 free(src); 1168 } 1169 1170 void 1171 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 1172 { 1173 char *bp, *host = NULL, *src = NULL, *suser = NULL; 1174 arglist alist; 1175 struct sftp_conn *conn = NULL; 1176 int i, r, sport = -1; 1177 1178 memset(&alist, '\0', sizeof(alist)); 1179 alist.list = NULL; 1180 1181 for (i = 0; i < argc - 1; i++) { 1182 free(suser); 1183 free(host); 1184 free(src); 1185 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1186 if (r == -1) { 1187 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1188 ++errs; 1189 continue; 1190 } 1191 if (r != 0) 1192 parse_user_host_path(argv[i], &suser, &host, &src); 1193 if (suser != NULL && !okname(suser)) { 1194 ++errs; 1195 continue; 1196 } 1197 if (!host) { /* Local to local. */ 1198 freeargs(&alist); 1199 addargs(&alist, "%s", _PATH_CP); 1200 if (iamrecursive) 1201 addargs(&alist, "-r"); 1202 if (pflag) 1203 addargs(&alist, "-p"); 1204 addargs(&alist, "--"); 1205 addargs(&alist, "%s", argv[i]); 1206 addargs(&alist, "%s", argv[argc-1]); 1207 if (do_local_cmd(&alist)) 1208 ++errs; 1209 continue; 1210 } 1211 /* Remote to local. */ 1212 if (mode == MODE_SFTP) { 1213 conn = do_sftp_connect(host, suser, sport, 1214 sftp_direct, &remin, &remout, &do_cmd_pid); 1215 if (conn == NULL) { 1216 error("sftp connection failed"); 1217 ++errs; 1218 continue; 1219 } 1220 1221 /* The protocol */ 1222 sink_sftp(1, argv[argc - 1], src, conn); 1223 1224 free(conn); 1225 (void) close(remin); 1226 (void) close(remout); 1227 remin = remout = -1; 1228 continue; 1229 } 1230 /* SCP */ 1231 xasprintf(&bp, "%s -f %s%s", 1232 cmd, *src == '-' ? "-- " : "", src); 1233 if (do_cmd(ssh_program, host, suser, sport, 0, bp, 1234 &remin, &remout, &do_cmd_pid) < 0) { 1235 free(bp); 1236 ++errs; 1237 continue; 1238 } 1239 free(bp); 1240 sink(1, argv + argc - 1, src); 1241 (void) close(remin); 1242 remin = remout = -1; 1243 } 1244 free(suser); 1245 free(host); 1246 free(src); 1247 } 1248 1249 /* Prepare remote path, handling ~ by assuming cwd is the homedir */ 1250 static char * 1251 prepare_remote_path(struct sftp_conn *conn, const char *path) 1252 { 1253 size_t nslash; 1254 1255 /* Handle ~ prefixed paths */ 1256 if (*path == '\0' || strcmp(path, "~") == 0) 1257 return xstrdup("."); 1258 if (*path != '~') 1259 return xstrdup(path); 1260 if (strncmp(path, "~/", 2) == 0) { 1261 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2)) 1262 return xstrdup("."); 1263 return xstrdup(path + 2 + nslash); 1264 } 1265 if (can_expand_path(conn)) 1266 return do_expand_path(conn, path); 1267 /* No protocol extension */ 1268 error("server expand-path extension is required " 1269 "for ~user paths in SFTP mode"); 1270 return NULL; 1271 } 1272 1273 void 1274 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) 1275 { 1276 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1277 int src_is_dir, target_is_dir; 1278 Attrib a; 1279 struct stat st; 1280 1281 memset(&a, '\0', sizeof(a)); 1282 if (stat(src, &st) != 0) 1283 fatal("stat local \"%s\": %s", src, strerror(errno)); 1284 src_is_dir = S_ISDIR(st.st_mode); 1285 if ((filename = basename(src)) == NULL) 1286 fatal("basename \"%s\": %s", src, strerror(errno)); 1287 1288 /* 1289 * No need to glob here - the local shell already took care of 1290 * the expansions 1291 */ 1292 if ((target = prepare_remote_path(conn, targ)) == NULL) 1293 cleanup_exit(255); 1294 target_is_dir = remote_is_dir(conn, target); 1295 if (targetshouldbedirectory && !target_is_dir) { 1296 debug("target directory \"%s\" does not exist", target); 1297 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS; 1298 a.perm = st.st_mode | 0700; /* ensure writable */ 1299 if (do_mkdir(conn, target, &a, 1) != 0) 1300 cleanup_exit(255); /* error already logged */ 1301 target_is_dir = 1; 1302 } 1303 if (target_is_dir) 1304 abs_dst = path_append(target, filename); 1305 else { 1306 abs_dst = target; 1307 target = NULL; 1308 } 1309 debug3_f("copying local %s to remote %s", src, abs_dst); 1310 1311 if (src_is_dir && iamrecursive) { 1312 if (upload_dir(conn, src, abs_dst, pflag, 1313 SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) { 1314 error("failed to upload directory %s to %s", src, targ); 1315 errs = 1; 1316 } 1317 } else if (do_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) { 1318 error("failed to upload file %s to %s", src, targ); 1319 errs = 1; 1320 } 1321 1322 free(abs_dst); 1323 free(target); 1324 } 1325 1326 void 1327 source(int argc, char **argv) 1328 { 1329 struct stat stb; 1330 static BUF buffer; 1331 BUF *bp; 1332 off_t i, statbytes; 1333 size_t amt, nr; 1334 int fd = -1, haderr, indx; 1335 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1336 int len; 1337 1338 for (indx = 0; indx < argc; ++indx) { 1339 name = argv[indx]; 1340 statbytes = 0; 1341 len = strlen(name); 1342 while (len > 1 && name[len-1] == '/') 1343 name[--len] = '\0'; 1344 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1) 1345 goto syserr; 1346 if (strchr(name, '\n') != NULL) { 1347 strnvis(encname, name, sizeof(encname), VIS_NL); 1348 name = encname; 1349 } 1350 if (fstat(fd, &stb) == -1) { 1351 syserr: run_err("%s: %s", name, strerror(errno)); 1352 goto next; 1353 } 1354 if (stb.st_size < 0) { 1355 run_err("%s: %s", name, "Negative file size"); 1356 goto next; 1357 } 1358 unset_nonblock(fd); 1359 switch (stb.st_mode & S_IFMT) { 1360 case S_IFREG: 1361 break; 1362 case S_IFDIR: 1363 if (iamrecursive) { 1364 rsource(name, &stb); 1365 goto next; 1366 } 1367 /* FALLTHROUGH */ 1368 default: 1369 run_err("%s: not a regular file", name); 1370 goto next; 1371 } 1372 if ((last = strrchr(name, '/')) == NULL) 1373 last = name; 1374 else 1375 ++last; 1376 curfile = last; 1377 if (pflag) { 1378 if (do_times(remout, verbose_mode, &stb) < 0) 1379 goto next; 1380 } 1381 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1382 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1383 (u_int) (stb.st_mode & FILEMODEMASK), 1384 (long long)stb.st_size, last); 1385 if (verbose_mode) 1386 fmprintf(stderr, "Sending file modes: %s", buf); 1387 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1388 if (response() < 0) 1389 goto next; 1390 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1391 next: if (fd != -1) { 1392 (void) close(fd); 1393 fd = -1; 1394 } 1395 continue; 1396 } 1397 if (showprogress) 1398 start_progress_meter(curfile, stb.st_size, &statbytes); 1399 set_nonblock(remout); 1400 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1401 amt = bp->cnt; 1402 if (i + (off_t)amt > stb.st_size) 1403 amt = stb.st_size - i; 1404 if (!haderr) { 1405 if ((nr = atomicio(read, fd, 1406 bp->buf, amt)) != amt) { 1407 haderr = errno; 1408 memset(bp->buf + nr, 0, amt - nr); 1409 } 1410 } 1411 /* Keep writing after error to retain sync */ 1412 if (haderr) { 1413 (void)atomicio(vwrite, remout, bp->buf, amt); 1414 memset(bp->buf, 0, amt); 1415 continue; 1416 } 1417 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1418 &statbytes) != amt) 1419 haderr = errno; 1420 } 1421 unset_nonblock(remout); 1422 1423 if (fd != -1) { 1424 if (close(fd) == -1 && !haderr) 1425 haderr = errno; 1426 fd = -1; 1427 } 1428 if (!haderr) 1429 (void) atomicio(vwrite, remout, "", 1); 1430 else 1431 run_err("%s: %s", name, strerror(haderr)); 1432 (void) response(); 1433 if (showprogress) 1434 stop_progress_meter(); 1435 } 1436 } 1437 1438 void 1439 rsource(char *name, struct stat *statp) 1440 { 1441 DIR *dirp; 1442 struct dirent *dp; 1443 char *last, *vect[1], path[PATH_MAX]; 1444 1445 if (!(dirp = opendir(name))) { 1446 run_err("%s: %s", name, strerror(errno)); 1447 return; 1448 } 1449 last = strrchr(name, '/'); 1450 if (last == NULL) 1451 last = name; 1452 else 1453 last++; 1454 if (pflag) { 1455 if (do_times(remout, verbose_mode, statp) < 0) { 1456 closedir(dirp); 1457 return; 1458 } 1459 } 1460 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1461 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1462 if (verbose_mode) 1463 fmprintf(stderr, "Entering directory: %s", path); 1464 (void) atomicio(vwrite, remout, path, strlen(path)); 1465 if (response() < 0) { 1466 closedir(dirp); 1467 return; 1468 } 1469 while ((dp = readdir(dirp)) != NULL) { 1470 if (dp->d_ino == 0) 1471 continue; 1472 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1473 continue; 1474 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 1475 run_err("%s/%s: name too long", name, dp->d_name); 1476 continue; 1477 } 1478 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 1479 vect[0] = path; 1480 source(1, vect); 1481 } 1482 (void) closedir(dirp); 1483 (void) atomicio(vwrite, remout, "E\n", 2); 1484 (void) response(); 1485 } 1486 1487 void 1488 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) 1489 { 1490 char *abs_src = NULL; 1491 char *abs_dst = NULL; 1492 glob_t g; 1493 char *filename, *tmp = NULL; 1494 int i, r, err = 0, dst_is_dir; 1495 struct stat st; 1496 1497 memset(&g, 0, sizeof(g)); 1498 1499 /* 1500 * Here, we need remote glob as SFTP can not depend on remote shell 1501 * expansions 1502 */ 1503 if ((abs_src = prepare_remote_path(conn, src)) == NULL) { 1504 err = -1; 1505 goto out; 1506 } 1507 1508 debug3_f("copying remote %s to local %s", abs_src, dst); 1509 if ((r = remote_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK, 1510 NULL, &g)) != 0) { 1511 if (r == GLOB_NOSPACE) 1512 error("%s: too many glob matches", src); 1513 else 1514 error("%s: %s", src, strerror(ENOENT)); 1515 err = -1; 1516 goto out; 1517 } 1518 1519 /* Did we actually get any matches back from the glob? */ 1520 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { 1521 /* 1522 * If nothing matched but a path returned, then it's probably 1523 * a GLOB_NOCHECK result. Check whether the unglobbed path 1524 * exists so we can give a nice error message early. 1525 */ 1526 if (do_stat(conn, g.gl_pathv[0], 1) == NULL) { 1527 error("%s: %s", src, strerror(ENOENT)); 1528 err = -1; 1529 goto out; 1530 } 1531 } 1532 1533 if ((r = stat(dst, &st)) != 0) 1534 debug2_f("stat local \"%s\": %s", dst, strerror(errno)); 1535 dst_is_dir = r == 0 && S_ISDIR(st.st_mode); 1536 1537 if (g.gl_matchc > 1 && !dst_is_dir) { 1538 if (r == 0) { 1539 error("Multiple files match pattern, but destination " 1540 "\"%s\" is not a directory", dst); 1541 err = -1; 1542 goto out; 1543 } 1544 debug2_f("creating destination \"%s\"", dst); 1545 if (mkdir(dst, 0777) != 0) { 1546 error("local mkdir \"%s\": %s", dst, strerror(errno)); 1547 err = -1; 1548 goto out; 1549 } 1550 dst_is_dir = 1; 1551 } 1552 1553 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1554 tmp = xstrdup(g.gl_pathv[i]); 1555 if ((filename = basename(tmp)) == NULL) { 1556 error("basename %s: %s", tmp, strerror(errno)); 1557 err = -1; 1558 goto out; 1559 } 1560 1561 if (dst_is_dir) 1562 abs_dst = path_append(dst, filename); 1563 else 1564 abs_dst = xstrdup(dst); 1565 1566 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1567 if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1568 if (download_dir(conn, g.gl_pathv[i], abs_dst, NULL, 1569 pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1) 1570 err = -1; 1571 } else { 1572 if (do_download(conn, g.gl_pathv[i], abs_dst, NULL, 1573 pflag, 0, 0, 1) == -1) 1574 err = -1; 1575 } 1576 free(abs_dst); 1577 abs_dst = NULL; 1578 free(tmp); 1579 tmp = NULL; 1580 } 1581 1582 out: 1583 free(abs_src); 1584 free(tmp); 1585 globfree(&g); 1586 if (err == -1) 1587 errs = 1; 1588 } 1589 1590 1591 #define TYPE_OVERFLOW(type, val) \ 1592 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1593 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1594 (sizeof(type) != 4 && sizeof(type) != 8)) 1595 1596 void 1597 sink(int argc, char **argv, const char *src) 1598 { 1599 static BUF buffer; 1600 struct stat stb; 1601 BUF *bp; 1602 off_t i; 1603 size_t j, count; 1604 int amt, exists, first, ofd; 1605 mode_t mode, omode, mask; 1606 off_t size, statbytes; 1607 unsigned long long ull; 1608 int setimes, targisdir, wrerr; 1609 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; 1610 char **patterns = NULL; 1611 size_t n, npatterns = 0; 1612 struct timeval tv[2]; 1613 1614 #define atime tv[0] 1615 #define mtime tv[1] 1616 #define SCREWUP(str) { why = str; goto screwup; } 1617 1618 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1619 SCREWUP("Unexpected off_t/time_t size"); 1620 1621 setimes = targisdir = 0; 1622 mask = umask(0); 1623 if (!pflag) 1624 (void) umask(mask); 1625 if (argc != 1) { 1626 run_err("ambiguous target"); 1627 exit(1); 1628 } 1629 targ = *argv; 1630 if (targetshouldbedirectory) 1631 verifydir(targ); 1632 1633 (void) atomicio(vwrite, remout, "", 1); 1634 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1635 targisdir = 1; 1636 if (src != NULL && !iamrecursive && !Tflag) { 1637 /* 1638 * Prepare to try to restrict incoming filenames to match 1639 * the requested destination file glob. 1640 */ 1641 if (brace_expand(src, &patterns, &npatterns) != 0) 1642 fatal_f("could not expand pattern"); 1643 } 1644 for (first = 1;; first = 0) { 1645 cp = buf; 1646 if (atomicio(read, remin, cp, 1) != 1) 1647 goto done; 1648 if (*cp++ == '\n') 1649 SCREWUP("unexpected <newline>"); 1650 do { 1651 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1652 SCREWUP("lost connection"); 1653 *cp++ = ch; 1654 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1655 *cp = 0; 1656 if (verbose_mode) 1657 fmprintf(stderr, "Sink: %s", buf); 1658 1659 if (buf[0] == '\01' || buf[0] == '\02') { 1660 if (iamremote == 0) { 1661 (void) snmprintf(visbuf, sizeof(visbuf), 1662 NULL, "%s", buf + 1); 1663 (void) atomicio(vwrite, STDERR_FILENO, 1664 visbuf, strlen(visbuf)); 1665 } 1666 if (buf[0] == '\02') 1667 exit(1); 1668 ++errs; 1669 continue; 1670 } 1671 if (buf[0] == 'E') { 1672 (void) atomicio(vwrite, remout, "", 1); 1673 goto done; 1674 } 1675 if (ch == '\n') 1676 *--cp = 0; 1677 1678 cp = buf; 1679 if (*cp == 'T') { 1680 setimes++; 1681 cp++; 1682 if (!isdigit((unsigned char)*cp)) 1683 SCREWUP("mtime.sec not present"); 1684 ull = strtoull(cp, &cp, 10); 1685 if (!cp || *cp++ != ' ') 1686 SCREWUP("mtime.sec not delimited"); 1687 if (TYPE_OVERFLOW(time_t, ull)) 1688 setimes = 0; /* out of range */ 1689 mtime.tv_sec = ull; 1690 mtime.tv_usec = strtol(cp, &cp, 10); 1691 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1692 mtime.tv_usec > 999999) 1693 SCREWUP("mtime.usec not delimited"); 1694 if (!isdigit((unsigned char)*cp)) 1695 SCREWUP("atime.sec not present"); 1696 ull = strtoull(cp, &cp, 10); 1697 if (!cp || *cp++ != ' ') 1698 SCREWUP("atime.sec not delimited"); 1699 if (TYPE_OVERFLOW(time_t, ull)) 1700 setimes = 0; /* out of range */ 1701 atime.tv_sec = ull; 1702 atime.tv_usec = strtol(cp, &cp, 10); 1703 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1704 atime.tv_usec > 999999) 1705 SCREWUP("atime.usec not delimited"); 1706 (void) atomicio(vwrite, remout, "", 1); 1707 continue; 1708 } 1709 if (*cp != 'C' && *cp != 'D') { 1710 /* 1711 * Check for the case "rcp remote:foo\* local:bar". 1712 * In this case, the line "No match." can be returned 1713 * by the shell before the rcp command on the remote is 1714 * executed so the ^Aerror_message convention isn't 1715 * followed. 1716 */ 1717 if (first) { 1718 run_err("%s", cp); 1719 exit(1); 1720 } 1721 SCREWUP("expected control record"); 1722 } 1723 mode = 0; 1724 for (++cp; cp < buf + 5; cp++) { 1725 if (*cp < '0' || *cp > '7') 1726 SCREWUP("bad mode"); 1727 mode = (mode << 3) | (*cp - '0'); 1728 } 1729 if (!pflag) 1730 mode &= ~mask; 1731 if (*cp++ != ' ') 1732 SCREWUP("mode not delimited"); 1733 1734 if (!isdigit((unsigned char)*cp)) 1735 SCREWUP("size not present"); 1736 ull = strtoull(cp, &cp, 10); 1737 if (!cp || *cp++ != ' ') 1738 SCREWUP("size not delimited"); 1739 if (TYPE_OVERFLOW(off_t, ull)) 1740 SCREWUP("size out of range"); 1741 size = (off_t)ull; 1742 1743 if (*cp == '\0' || strchr(cp, '/') != NULL || 1744 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1745 run_err("error: unexpected filename: %s", cp); 1746 exit(1); 1747 } 1748 if (npatterns > 0) { 1749 for (n = 0; n < npatterns; n++) { 1750 if (strcmp(patterns[n], cp) == 0 || 1751 fnmatch(patterns[n], cp, 0) == 0) 1752 break; 1753 } 1754 if (n >= npatterns) 1755 SCREWUP("filename does not match request"); 1756 } 1757 if (targisdir) { 1758 static char *namebuf; 1759 static size_t cursize; 1760 size_t need; 1761 1762 need = strlen(targ) + strlen(cp) + 250; 1763 if (need > cursize) { 1764 free(namebuf); 1765 namebuf = xmalloc(need); 1766 cursize = need; 1767 } 1768 (void) snprintf(namebuf, need, "%s%s%s", targ, 1769 strcmp(targ, "/") ? "/" : "", cp); 1770 np = namebuf; 1771 } else 1772 np = targ; 1773 curfile = cp; 1774 exists = stat(np, &stb) == 0; 1775 if (buf[0] == 'D') { 1776 int mod_flag = pflag; 1777 if (!iamrecursive) 1778 SCREWUP("received directory without -r"); 1779 if (exists) { 1780 if (!S_ISDIR(stb.st_mode)) { 1781 errno = ENOTDIR; 1782 goto bad; 1783 } 1784 if (pflag) 1785 (void) chmod(np, mode); 1786 } else { 1787 /* Handle copying from a read-only directory */ 1788 mod_flag = 1; 1789 if (mkdir(np, mode | S_IRWXU) == -1) 1790 goto bad; 1791 } 1792 vect[0] = xstrdup(np); 1793 sink(1, vect, src); 1794 if (setimes) { 1795 setimes = 0; 1796 (void) utimes(vect[0], tv); 1797 } 1798 if (mod_flag) 1799 (void) chmod(vect[0], mode); 1800 free(vect[0]); 1801 continue; 1802 } 1803 omode = mode; 1804 mode |= S_IWUSR; 1805 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1806 bad: run_err("%s: %s", np, strerror(errno)); 1807 continue; 1808 } 1809 (void) atomicio(vwrite, remout, "", 1); 1810 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1811 (void) close(ofd); 1812 continue; 1813 } 1814 cp = bp->buf; 1815 wrerr = 0; 1816 1817 /* 1818 * NB. do not use run_err() unless immediately followed by 1819 * exit() below as it may send a spurious reply that might 1820 * desyncronise us from the peer. Use note_err() instead. 1821 */ 1822 statbytes = 0; 1823 if (showprogress) 1824 start_progress_meter(curfile, size, &statbytes); 1825 set_nonblock(remin); 1826 for (count = i = 0; i < size; i += bp->cnt) { 1827 amt = bp->cnt; 1828 if (i + amt > size) 1829 amt = size - i; 1830 count += amt; 1831 do { 1832 j = atomicio6(read, remin, cp, amt, 1833 scpio, &statbytes); 1834 if (j == 0) { 1835 run_err("%s", j != EPIPE ? 1836 strerror(errno) : 1837 "dropped connection"); 1838 exit(1); 1839 } 1840 amt -= j; 1841 cp += j; 1842 } while (amt > 0); 1843 1844 if (count == bp->cnt) { 1845 /* Keep reading so we stay sync'd up. */ 1846 if (!wrerr) { 1847 if (atomicio(vwrite, ofd, bp->buf, 1848 count) != count) { 1849 note_err("%s: %s", np, 1850 strerror(errno)); 1851 wrerr = 1; 1852 } 1853 } 1854 count = 0; 1855 cp = bp->buf; 1856 } 1857 } 1858 unset_nonblock(remin); 1859 if (count != 0 && !wrerr && 1860 atomicio(vwrite, ofd, bp->buf, count) != count) { 1861 note_err("%s: %s", np, strerror(errno)); 1862 wrerr = 1; 1863 } 1864 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1865 ftruncate(ofd, size) != 0) 1866 note_err("%s: truncate: %s", np, strerror(errno)); 1867 if (pflag) { 1868 if (exists || omode != mode) 1869 if (fchmod(ofd, omode)) { 1870 note_err("%s: set mode: %s", 1871 np, strerror(errno)); 1872 } 1873 } else { 1874 if (!exists && omode != mode) 1875 if (fchmod(ofd, omode & ~mask)) { 1876 note_err("%s: set mode: %s", 1877 np, strerror(errno)); 1878 } 1879 } 1880 if (close(ofd) == -1) 1881 note_err("%s: close: %s", np, strerror(errno)); 1882 (void) response(); 1883 if (showprogress) 1884 stop_progress_meter(); 1885 if (setimes && !wrerr) { 1886 setimes = 0; 1887 if (utimes(np, tv) == -1) { 1888 note_err("%s: set times: %s", 1889 np, strerror(errno)); 1890 } 1891 } 1892 /* If no error was noted then signal success for this file */ 1893 if (note_err(NULL) == 0) 1894 (void) atomicio(vwrite, remout, "", 1); 1895 } 1896 done: 1897 for (n = 0; n < npatterns; n++) 1898 free(patterns[n]); 1899 free(patterns); 1900 return; 1901 screwup: 1902 for (n = 0; n < npatterns; n++) 1903 free(patterns[n]); 1904 free(patterns); 1905 run_err("protocol error: %s", why); 1906 exit(1); 1907 } 1908 1909 void 1910 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, 1911 char *src, char *targ) 1912 { 1913 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1914 char *abs_src = NULL, *tmp = NULL; 1915 glob_t g; 1916 int i, r, targetisdir, err = 0; 1917 1918 if ((filename = basename(src)) == NULL) 1919 fatal("basename %s: %s", src, strerror(errno)); 1920 1921 if ((abs_src = prepare_remote_path(from, src)) == NULL || 1922 (target = prepare_remote_path(to, targ)) == NULL) 1923 cleanup_exit(255); 1924 memset(&g, 0, sizeof(g)); 1925 1926 targetisdir = remote_is_dir(to, target); 1927 if (!targetisdir && targetshouldbedirectory) { 1928 error("%s: destination is not a directory", targ); 1929 err = -1; 1930 goto out; 1931 } 1932 1933 debug3_f("copying remote %s to remote %s", abs_src, target); 1934 if ((r = remote_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK, 1935 NULL, &g)) != 0) { 1936 if (r == GLOB_NOSPACE) 1937 error("%s: too many glob matches", src); 1938 else 1939 error("%s: %s", src, strerror(ENOENT)); 1940 err = -1; 1941 goto out; 1942 } 1943 1944 /* Did we actually get any matches back from the glob? */ 1945 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { 1946 /* 1947 * If nothing matched but a path returned, then it's probably 1948 * a GLOB_NOCHECK result. Check whether the unglobbed path 1949 * exists so we can give a nice error message early. 1950 */ 1951 if (do_stat(from, g.gl_pathv[0], 1) == NULL) { 1952 error("%s: %s", src, strerror(ENOENT)); 1953 err = -1; 1954 goto out; 1955 } 1956 } 1957 1958 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1959 tmp = xstrdup(g.gl_pathv[i]); 1960 if ((filename = basename(tmp)) == NULL) { 1961 error("basename %s: %s", tmp, strerror(errno)); 1962 err = -1; 1963 goto out; 1964 } 1965 1966 if (targetisdir) 1967 abs_dst = path_append(target, filename); 1968 else 1969 abs_dst = xstrdup(target); 1970 1971 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1972 if (globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1973 if (crossload_dir(from, to, g.gl_pathv[i], abs_dst, 1974 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) 1975 err = -1; 1976 } else { 1977 if (do_crossload(from, to, g.gl_pathv[i], abs_dst, NULL, 1978 pflag) == -1) 1979 err = -1; 1980 } 1981 free(abs_dst); 1982 abs_dst = NULL; 1983 free(tmp); 1984 tmp = NULL; 1985 } 1986 1987 out: 1988 free(abs_src); 1989 free(abs_dst); 1990 free(target); 1991 free(tmp); 1992 globfree(&g); 1993 if (err == -1) 1994 errs = 1; 1995 } 1996 1997 int 1998 response(void) 1999 { 2000 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 2001 2002 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 2003 lostconn(0); 2004 2005 cp = rbuf; 2006 switch (resp) { 2007 case 0: /* ok */ 2008 return (0); 2009 default: 2010 *cp++ = resp; 2011 /* FALLTHROUGH */ 2012 case 1: /* error, followed by error msg */ 2013 case 2: /* fatal error, "" */ 2014 do { 2015 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 2016 lostconn(0); 2017 *cp++ = ch; 2018 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 2019 2020 if (!iamremote) { 2021 cp[-1] = '\0'; 2022 (void) snmprintf(visbuf, sizeof(visbuf), 2023 NULL, "%s\n", rbuf); 2024 (void) atomicio(vwrite, STDERR_FILENO, 2025 visbuf, strlen(visbuf)); 2026 } 2027 ++errs; 2028 if (resp == 1) 2029 return (-1); 2030 exit(1); 2031 } 2032 /* NOTREACHED */ 2033 } 2034 2035 void 2036 usage(void) 2037 { 2038 (void) fprintf(stderr, 2039 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" 2040 " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n" 2041 " [-P port] [-S program] [-X sftp_option] source ... target\n"); 2042 exit(1); 2043 } 2044 2045 void 2046 run_err(const char *fmt,...) 2047 { 2048 static FILE *fp; 2049 va_list ap; 2050 2051 ++errs; 2052 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 2053 (void) fprintf(fp, "%c", 0x01); 2054 (void) fprintf(fp, "scp: "); 2055 va_start(ap, fmt); 2056 (void) vfprintf(fp, fmt, ap); 2057 va_end(ap); 2058 (void) fprintf(fp, "\n"); 2059 (void) fflush(fp); 2060 } 2061 2062 if (!iamremote) { 2063 va_start(ap, fmt); 2064 vfmprintf(stderr, fmt, ap); 2065 va_end(ap); 2066 fprintf(stderr, "\n"); 2067 } 2068 } 2069 2070 /* 2071 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 2072 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 2073 * any active error at the end of the transfer. 2074 */ 2075 int 2076 note_err(const char *fmt, ...) 2077 { 2078 static char *emsg; 2079 va_list ap; 2080 2081 /* Replay any previously-noted error */ 2082 if (fmt == NULL) { 2083 if (emsg == NULL) 2084 return 0; 2085 run_err("%s", emsg); 2086 free(emsg); 2087 emsg = NULL; 2088 return -1; 2089 } 2090 2091 errs++; 2092 /* Prefer first-noted error */ 2093 if (emsg != NULL) 2094 return -1; 2095 2096 va_start(ap, fmt); 2097 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 2098 va_end(ap); 2099 return -1; 2100 } 2101 2102 void 2103 verifydir(char *cp) 2104 { 2105 struct stat stb; 2106 2107 if (!stat(cp, &stb)) { 2108 if (S_ISDIR(stb.st_mode)) 2109 return; 2110 errno = ENOTDIR; 2111 } 2112 run_err("%s: %s", cp, strerror(errno)); 2113 killchild(0); 2114 } 2115 2116 int 2117 okname(char *cp0) 2118 { 2119 int c; 2120 char *cp; 2121 2122 cp = cp0; 2123 do { 2124 c = (int)*cp; 2125 if (c & 0200) 2126 goto bad; 2127 if (!isalpha(c) && !isdigit((unsigned char)c)) { 2128 switch (c) { 2129 case '\'': 2130 case '"': 2131 case '`': 2132 case ' ': 2133 case '#': 2134 goto bad; 2135 default: 2136 break; 2137 } 2138 } 2139 } while (*++cp); 2140 return (1); 2141 2142 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 2143 return (0); 2144 } 2145 2146 BUF * 2147 allocbuf(BUF *bp, int fd, int blksize) 2148 { 2149 size_t size; 2150 struct stat stb; 2151 2152 if (fstat(fd, &stb) == -1) { 2153 run_err("fstat: %s", strerror(errno)); 2154 return (0); 2155 } 2156 size = ROUNDUP(stb.st_blksize, blksize); 2157 if (size == 0) 2158 size = blksize; 2159 if (bp->cnt >= size) 2160 return (bp); 2161 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 2162 bp->cnt = size; 2163 return (bp); 2164 } 2165 2166 void 2167 lostconn(int signo) 2168 { 2169 if (!iamremote) 2170 (void)write(STDERR_FILENO, "lost connection\n", 16); 2171 if (signo) 2172 _exit(1); 2173 else 2174 exit(1); 2175 } 2176 2177 void 2178 cleanup_exit(int i) 2179 { 2180 if (remin > 0) 2181 close(remin); 2182 if (remout > 0) 2183 close(remout); 2184 if (remin2 > 0) 2185 close(remin2); 2186 if (remout2 > 0) 2187 close(remout2); 2188 if (do_cmd_pid > 0) 2189 waitpid(do_cmd_pid, NULL, 0); 2190 if (do_cmd_pid2 > 0) 2191 waitpid(do_cmd_pid2, NULL, 0); 2192 exit(i); 2193 } 2194