1 /* $NetBSD: scp.c,v 1.42 2024/07/08 22:33:44 christos Exp $ */ 2 /* $OpenBSD: scp.c,v 1.261 2024/06/26 23:14:14 deraadt Exp $ */ 3 4 /* 5 * scp - secure remote copy. This is basically patched BSD rcp which 6 * uses ssh to do the data transfer (instead of using rcmd). 7 * 8 * NOTE: This version should NOT be suid root. (This uses ssh to 9 * do the transfer and ssh has the necessary privileges.) 10 * 11 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 12 * 13 * As far as I am concerned, the code I have written for this software 14 * can be used freely for any purpose. Any derived versions of this 15 * software must be clearly marked as such, and if the derived work is 16 * incompatible with the protocol description in the RFC file, it must be 17 * called by a name other than "ssh" or "Secure Shell". 18 */ 19 /* 20 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 21 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the above copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 33 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 34 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 35 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 36 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 41 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44 /* 45 * Parts from: 46 * 47 * Copyright (c) 1983, 1990, 1992, 1993, 1995 48 * The Regents of the University of California. All rights reserved. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 */ 75 76 #include "includes.h" 77 __RCSID("$NetBSD: scp.c,v 1.42 2024/07/08 22:33:44 christos Exp $"); 78 79 #include <sys/param.h> /* roundup MAX */ 80 #include <sys/types.h> 81 #include <sys/poll.h> 82 #include <sys/wait.h> 83 #include <sys/stat.h> 84 #include <sys/time.h> 85 #include <sys/uio.h> 86 87 #include <ctype.h> 88 #include <dirent.h> 89 #include <errno.h> 90 #include <fcntl.h> 91 #include <fnmatch.h> 92 #include <glob.h> 93 #include <libgen.h> 94 #include <locale.h> 95 #include <pwd.h> 96 #include <signal.h> 97 #include <stdarg.h> 98 #include <stdint.h> 99 #include <stdio.h> 100 #include <stdlib.h> 101 #include <string.h> 102 #include <time.h> 103 #include <unistd.h> 104 #include <limits.h> 105 #include <util.h> 106 #include <vis.h> 107 108 #include "xmalloc.h" 109 #include "ssh.h" 110 #include "atomicio.h" 111 #include "pathnames.h" 112 #include "log.h" 113 #include "misc.h" 114 #include "progressmeter.h" 115 #include "utf8.h" 116 #include "sftp.h" 117 #include "fmt_scaled.h" 118 119 #include "sftp-common.h" 120 #include "sftp-client.h" 121 122 #define COPY_BUFLEN 16384 123 124 int do_cmd(const char *, const char *, const char *, int, int, const char *, int *, int *, pid_t *); 125 int do_cmd2(char *, char *, int, char *, int, int); 126 127 static char empty[] = ""; 128 129 /* Struct for addargs */ 130 arglist args; 131 arglist remote_remote_args; 132 133 /* Bandwidth limit */ 134 long long limit_kbps = 0; 135 struct bwlimit bwlimit; 136 137 /* Name of current file being transferred. */ 138 char *curfile; 139 140 /* This is set to non-zero to enable verbose mode. */ 141 int verbose_mode = 0; 142 LogLevel log_level = SYSLOG_LEVEL_INFO; 143 144 /* This is set to zero if the progressmeter is not desired. */ 145 int showprogress = 1; 146 147 /* 148 * This is set to non-zero if remote-remote copy should be piped 149 * through this process. 150 */ 151 int throughlocal = 1; 152 153 /* Non-standard port to use for the ssh connection or -1. */ 154 int sshport = -1; 155 156 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 157 #ifdef RESCUEDIR 158 const char *ssh_program = RESCUEDIR "/ssh"; 159 #else 160 const char *ssh_program = _PATH_SSH_PROGRAM; 161 #endif 162 163 /* This is used to store the pid of ssh_program */ 164 pid_t do_cmd_pid = -1; 165 pid_t do_cmd_pid2 = -1; 166 167 /* SFTP copy parameters */ 168 size_t sftp_copy_buflen; 169 size_t sftp_nrequests; 170 171 /* Needed for sftp */ 172 volatile sig_atomic_t interrupted = 0; 173 174 int sftp_glob(struct sftp_conn *, const char *, int, 175 int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ 176 177 __dead static void 178 killchild(int signo) 179 { 180 if (do_cmd_pid > 1) { 181 kill(do_cmd_pid, signo ? signo : SIGTERM); 182 (void)waitpid(do_cmd_pid, NULL, 0); 183 } 184 if (do_cmd_pid2 > 1) { 185 kill(do_cmd_pid2, signo ? signo : SIGTERM); 186 (void)waitpid(do_cmd_pid2, NULL, 0); 187 } 188 189 if (signo) 190 _exit(1); 191 exit(1); 192 } 193 194 static void 195 suspone(int pid, int signo) 196 { 197 int status; 198 199 if (pid > 1) { 200 kill(pid, signo); 201 while (waitpid(pid, &status, WUNTRACED) == -1 && 202 errno == EINTR) 203 ; 204 } 205 } 206 207 static void 208 suspchild(int signo) 209 { 210 int save_errno = errno; 211 suspone(do_cmd_pid, signo); 212 suspone(do_cmd_pid2, signo); 213 kill(getpid(), SIGSTOP); 214 errno = save_errno; 215 } 216 217 static int 218 do_local_cmd(arglist *a) 219 { 220 u_int i; 221 int status; 222 pid_t pid; 223 224 if (a->num == 0) 225 fatal("do_local_cmd: no arguments"); 226 227 if (verbose_mode) { 228 fprintf(stderr, "Executing:"); 229 for (i = 0; i < a->num; i++) 230 fmprintf(stderr, " %s", a->list[i]); 231 fprintf(stderr, "\n"); 232 } 233 if ((pid = fork()) == -1) 234 fatal("do_local_cmd: fork: %s", strerror(errno)); 235 236 if (pid == 0) { 237 execvp(a->list[0], a->list); 238 perror(a->list[0]); 239 exit(1); 240 } 241 242 do_cmd_pid = pid; 243 ssh_signal(SIGTERM, killchild); 244 ssh_signal(SIGINT, killchild); 245 ssh_signal(SIGHUP, killchild); 246 247 while (waitpid(pid, &status, 0) == -1) 248 if (errno != EINTR) 249 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 250 251 do_cmd_pid = -1; 252 253 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 254 return (-1); 255 256 return (0); 257 } 258 259 /* 260 * This function executes the given command as the specified user on the 261 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 262 * assigns the input and output file descriptors on success. 263 */ 264 265 int 266 do_cmd(const char *program, const char *host, const char *remuser, int port, int subsystem, 267 const char *cmd, int *fdin, int *fdout, pid_t *pid) 268 { 269 int sv[2]; 270 271 if (verbose_mode) 272 fmprintf(stderr, 273 "Executing: program %s host %s, user %s, command %s\n", 274 program, host, 275 remuser ? remuser : "(unspecified)", cmd); 276 277 if (port == -1) 278 port = sshport; 279 280 /* Create a socket pair for communicating with ssh. */ 281 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) 282 fatal("socketpair: %s", strerror(errno)); 283 284 ssh_signal(SIGTSTP, suspchild); 285 ssh_signal(SIGTTIN, suspchild); 286 ssh_signal(SIGTTOU, suspchild); 287 288 /* Fork a child to execute the command on the remote host using ssh. */ 289 *pid = fork(); 290 switch (*pid) { 291 case -1: 292 fatal("fork: %s", strerror(errno)); 293 case 0: 294 /* Child. */ 295 if (dup2(sv[0], STDIN_FILENO) == -1 || 296 dup2(sv[0], STDOUT_FILENO) == -1) { 297 perror("dup2"); 298 _exit(1); 299 } 300 close(sv[0]); 301 close(sv[1]); 302 replacearg(&args, 0, "%s", program); 303 if (port != -1) { 304 addargs(&args, "-p"); 305 addargs(&args, "%d", port); 306 } 307 if (remuser != NULL) { 308 addargs(&args, "-l"); 309 addargs(&args, "%s", remuser); 310 } 311 if (subsystem) 312 addargs(&args, "-s"); 313 addargs(&args, "--"); 314 addargs(&args, "%s", host); 315 addargs(&args, "%s", cmd); 316 317 execvp(program, args.list); 318 perror(program); 319 _exit(1); 320 default: 321 /* Parent. Close the other side, and return the local side. */ 322 close(sv[0]); 323 *fdin = sv[1]; 324 *fdout = sv[1]; 325 ssh_signal(SIGTERM, killchild); 326 ssh_signal(SIGINT, killchild); 327 ssh_signal(SIGHUP, killchild); 328 return 0; 329 } 330 } 331 332 /* 333 * This function executes a command similar to do_cmd(), but expects the 334 * input and output descriptors to be setup by a previous call to do_cmd(). 335 * This way the input and output of two commands can be connected. 336 */ 337 int 338 do_cmd2(char *host, char *remuser, int port, char *cmd, 339 int fdin, int fdout) 340 { 341 int status; 342 pid_t pid; 343 344 if (verbose_mode) 345 fmprintf(stderr, 346 "Executing: 2nd program %s host %s, user %s, command %s\n", 347 ssh_program, host, 348 remuser ? remuser : "(unspecified)", cmd); 349 350 if (port == -1) 351 port = sshport; 352 353 /* Fork a child to execute the command on the remote host using ssh. */ 354 pid = fork(); 355 if (pid == 0) { 356 if (dup2(fdin, 0) == -1) 357 perror("dup2"); 358 if (dup2(fdout, 1) == -1) 359 perror("dup2"); 360 361 replacearg(&args, 0, "%s", ssh_program); 362 if (port != -1) { 363 addargs(&args, "-p"); 364 addargs(&args, "%d", port); 365 } 366 if (remuser != NULL) { 367 addargs(&args, "-l"); 368 addargs(&args, "%s", remuser); 369 } 370 addargs(&args, "-oBatchMode=yes"); 371 addargs(&args, "--"); 372 addargs(&args, "%s", host); 373 addargs(&args, "%s", cmd); 374 375 execvp(ssh_program, args.list); 376 perror(ssh_program); 377 exit(1); 378 } else if (pid == -1) { 379 fatal("fork: %s", strerror(errno)); 380 } 381 while (waitpid(pid, &status, 0) == -1) 382 if (errno != EINTR) 383 fatal("do_cmd2: waitpid: %s", strerror(errno)); 384 return 0; 385 } 386 387 typedef struct { 388 size_t cnt; 389 char *buf; 390 } BUF; 391 392 BUF *allocbuf(BUF *, int, int); 393 __dead static void lostconn(int); 394 int okname(char *); 395 void run_err(const char *,...) 396 __attribute__((__format__ (printf, 1, 2))) 397 __attribute__((__nonnull__ (1))); 398 int note_err(const char *,...) 399 __attribute__((__format__ (printf, 1, 2))); 400 void verifydir(char *); 401 402 struct passwd *pwd; 403 uid_t userid; 404 int errs, remin, remout, remin2, remout2; 405 int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; 406 407 #define CMDNEEDS 64 408 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 409 410 enum scp_mode_e { 411 MODE_SCP, 412 MODE_SFTP 413 }; 414 415 int response(void); 416 void rsource(char *, struct stat *); 417 void sink(int, char *[], const char *); 418 void source(int, char *[]); 419 static void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); 420 static void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); 421 __dead static void usage(void); 422 423 void source_sftp(int, char *, char *, struct sftp_conn *); 424 void sink_sftp(int, char *, const char *, struct sftp_conn *); 425 void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, 426 char *, char *); 427 428 int 429 main(int argc, char **argv) 430 { 431 int ch, fflag, tflag, status, r, n; 432 char **newargv, *argv0; 433 const char *errstr; 434 extern char *optarg; 435 extern int optind; 436 enum scp_mode_e mode = MODE_SFTP; 437 char *sftp_direct = NULL; 438 long long llv; 439 440 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 441 sanitise_stdfd(); 442 443 setlocale(LC_CTYPE, ""); 444 445 /* Copy argv, because we modify it */ 446 argv0 = argv[0]; 447 newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv)); 448 for (n = 0; n < argc; n++) 449 newargv[n] = xstrdup(argv[n]); 450 argv = newargv; 451 452 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 453 454 memset(&args, '\0', sizeof(args)); 455 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 456 args.list = remote_remote_args.list = NULL; 457 addargs(&args, "%s", ssh_program); 458 addargs(&args, "-x"); 459 addargs(&args, "-oPermitLocalCommand=no"); 460 addargs(&args, "-oClearAllForwardings=yes"); 461 addargs(&args, "-oRemoteCommand=none"); 462 addargs(&args, "-oRequestTTY=no"); 463 464 fflag = Tflag = tflag = 0; 465 while ((ch = getopt(argc, argv, 466 "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) { 467 switch (ch) { 468 /* User-visible flags. */ 469 case '1': 470 fatal("SSH protocol v.1 is no longer supported"); 471 break; 472 case '2': 473 /* Ignored */ 474 break; 475 case 'A': 476 case '4': 477 case '6': 478 case 'C': 479 addargs(&args, "-%c", ch); 480 addargs(&remote_remote_args, "-%c", ch); 481 break; 482 case 'D': 483 sftp_direct = optarg; 484 break; 485 case '3': 486 throughlocal = 1; 487 break; 488 case 'R': 489 throughlocal = 0; 490 break; 491 case 'o': 492 case 'c': 493 case 'i': 494 case 'F': 495 case 'J': 496 addargs(&remote_remote_args, "-%c", ch); 497 addargs(&remote_remote_args, "%s", optarg); 498 addargs(&args, "-%c", ch); 499 addargs(&args, "%s", optarg); 500 break; 501 case 'O': 502 mode = MODE_SCP; 503 break; 504 case 's': 505 mode = MODE_SFTP; 506 break; 507 case 'P': 508 sshport = a2port(optarg); 509 if (sshport <= 0) 510 fatal("bad port \"%s\"\n", optarg); 511 break; 512 case 'B': 513 addargs(&remote_remote_args, "-oBatchmode=yes"); 514 addargs(&args, "-oBatchmode=yes"); 515 break; 516 case 'l': 517 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 518 &errstr); 519 if (errstr != NULL) 520 usage(); 521 limit_kbps *= 1024; /* kbps */ 522 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 523 break; 524 case 'p': 525 pflag = 1; 526 break; 527 case 'r': 528 iamrecursive = 1; 529 break; 530 case 'S': 531 ssh_program = xstrdup(optarg); 532 break; 533 case 'v': 534 addargs(&args, "-v"); 535 addargs(&remote_remote_args, "-v"); 536 if (verbose_mode == 0) 537 log_level = SYSLOG_LEVEL_DEBUG1; 538 else if (log_level < SYSLOG_LEVEL_DEBUG3) 539 log_level++; 540 verbose_mode = 1; 541 break; 542 case 'q': 543 addargs(&args, "-q"); 544 addargs(&remote_remote_args, "-q"); 545 showprogress = 0; 546 break; 547 case 'X': 548 /* Please keep in sync with sftp.c -X */ 549 if (strncmp(optarg, "buffer=", 7) == 0) { 550 r = scan_scaled(optarg + 7, &llv); 551 if (r == 0 && (llv <= 0 || llv > 256 * 1024)) { 552 r = -1; 553 errno = EINVAL; 554 } 555 if (r == -1) { 556 fatal("Invalid buffer size \"%s\": %s", 557 optarg + 7, strerror(errno)); 558 } 559 sftp_copy_buflen = (size_t)llv; 560 } else if (strncmp(optarg, "nrequests=", 10) == 0) { 561 llv = strtonum(optarg + 10, 1, 256 * 1024, 562 &errstr); 563 if (errstr != NULL) { 564 fatal("Invalid number of requests " 565 "\"%s\": %s", optarg + 10, errstr); 566 } 567 sftp_nrequests = (size_t)llv; 568 } else { 569 fatal("Invalid -X option"); 570 } 571 break; 572 573 /* Server options. */ 574 case 'd': 575 targetshouldbedirectory = 1; 576 break; 577 case 'f': /* "from" */ 578 iamremote = 1; 579 fflag = 1; 580 break; 581 case 't': /* "to" */ 582 iamremote = 1; 583 tflag = 1; 584 break; 585 case 'T': 586 Tflag = 1; 587 break; 588 default: 589 usage(); 590 } 591 } 592 argc -= optind; 593 argv += optind; 594 595 log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); 596 597 /* Do this last because we want the user to be able to override it */ 598 addargs(&args, "-oForwardAgent=no"); 599 600 if (iamremote) 601 mode = MODE_SCP; 602 603 if ((pwd = getpwuid(userid = getuid())) == NULL) 604 fatal("unknown user %u", (u_int) userid); 605 606 if (!isatty(STDOUT_FILENO)) 607 showprogress = 0; 608 609 if (pflag) { 610 /* Cannot pledge: -p allows setuid/setgid files... */ 611 } else { 612 #ifdef __OpenBSD__ 613 if (pledge("stdio rpath wpath cpath fattr tty proc exec", 614 NULL) == -1) { 615 perror("pledge"); 616 exit(1); 617 } 618 #endif 619 } 620 621 remin = STDIN_FILENO; 622 remout = STDOUT_FILENO; 623 624 if (fflag) { 625 /* Follow "protocol", send data. */ 626 (void) response(); 627 source(argc, argv); 628 exit(errs != 0); 629 } 630 if (tflag) { 631 /* Receive data. */ 632 sink(argc, argv, NULL); 633 exit(errs != 0); 634 } 635 if (argc < 2) 636 usage(); 637 if (argc > 2) 638 targetshouldbedirectory = 1; 639 640 remin = remout = -1; 641 do_cmd_pid = -1; 642 /* Command to be executed on remote system using "ssh". */ 643 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 644 verbose_mode ? " -v" : "", 645 iamrecursive ? " -r" : "", pflag ? " -p" : "", 646 targetshouldbedirectory ? " -d" : ""); 647 648 (void) ssh_signal(SIGPIPE, lostconn); 649 650 if (colon(argv[argc - 1])) /* Dest is remote host. */ 651 toremote(argc, argv, mode, sftp_direct); 652 else { 653 if (targetshouldbedirectory) 654 verifydir(argv[argc - 1]); 655 tolocal(argc, argv, mode, sftp_direct); /* Dest is local host. */ 656 } 657 /* 658 * Finally check the exit status of the ssh process, if one was forked 659 * and no error has occurred yet 660 */ 661 if (do_cmd_pid != -1 && (mode == MODE_SFTP || errs == 0)) { 662 if (remin != -1) 663 (void) close(remin); 664 if (remout != -1) 665 (void) close(remout); 666 if (waitpid(do_cmd_pid, &status, 0) == -1) 667 errs = 1; 668 else { 669 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 670 errs = 1; 671 } 672 } 673 exit(errs != 0); 674 } 675 676 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 677 static int 678 scpio(void *_cnt, size_t s) 679 { 680 off_t *cnt = (off_t *)_cnt; 681 682 *cnt += s; 683 refresh_progress_meter(0); 684 if (limit_kbps > 0) 685 bandwidth_limit(&bwlimit, s); 686 return 0; 687 } 688 689 static int 690 do_times(int fd, int verb, const struct stat *sb) 691 { 692 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 693 char buf[(20 + 7 + 2) * 2 + 2]; 694 695 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 696 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 697 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 698 if (verb) { 699 fprintf(stderr, "File mtime %lld atime %lld\n", 700 (long long)sb->st_mtime, (long long)sb->st_atime); 701 fprintf(stderr, "Sending file timestamps: %s", buf); 702 } 703 (void) atomicio(vwrite, fd, buf, strlen(buf)); 704 return (response()); 705 } 706 707 static int 708 parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp, 709 char **pathp) 710 { 711 int r; 712 713 r = parse_uri("scp", uri, userp, hostp, portp, pathp); 714 if (r == 0 && *pathp == NULL) 715 *pathp = xstrdup("."); 716 return r; 717 } 718 719 /* Appends a string to an array; returns 0 on success, -1 on alloc failure */ 720 static int 721 append(char *cp, char ***ap, size_t *np) 722 { 723 char **tmp; 724 725 if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) 726 return -1; 727 tmp[(*np)] = cp; 728 (*np)++; 729 *ap = tmp; 730 return 0; 731 } 732 733 /* 734 * Finds the start and end of the first brace pair in the pattern. 735 * returns 0 on success or -1 for invalid patterns. 736 */ 737 static int 738 find_brace(const char *pattern, int *startp, int *endp) 739 { 740 int i; 741 int in_bracket, brace_level; 742 743 *startp = *endp = -1; 744 in_bracket = brace_level = 0; 745 for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { 746 switch (pattern[i]) { 747 case '\\': 748 /* skip next character */ 749 if (pattern[i + 1] != '\0') 750 i++; 751 break; 752 case '[': 753 in_bracket = 1; 754 break; 755 case ']': 756 in_bracket = 0; 757 break; 758 case '{': 759 if (in_bracket) 760 break; 761 if (pattern[i + 1] == '}') { 762 /* Protect a single {}, for find(1), like csh */ 763 i++; /* skip */ 764 break; 765 } 766 if (*startp == -1) 767 *startp = i; 768 brace_level++; 769 break; 770 case '}': 771 if (in_bracket) 772 break; 773 if (*startp < 0) { 774 /* Unbalanced brace */ 775 return -1; 776 } 777 if (--brace_level <= 0) 778 *endp = i; 779 break; 780 } 781 } 782 /* unbalanced brackets/braces */ 783 if (*endp < 0 && (*startp >= 0 || in_bracket)) 784 return -1; 785 return 0; 786 } 787 788 /* 789 * Assembles and records a successfully-expanded pattern, returns -1 on 790 * alloc failure. 791 */ 792 static int 793 emit_expansion(const char *pattern, int brace_start, int brace_end, 794 int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) 795 { 796 char *cp; 797 size_t pattern_len; 798 int o = 0, tail_len; 799 800 if ((pattern_len = strlen(pattern)) == 0 || pattern_len >= INT_MAX) 801 return -1; 802 803 tail_len = strlen(pattern + brace_end + 1); 804 if ((cp = malloc(brace_start + (sel_end - sel_start) + 805 tail_len + 1)) == NULL) 806 return -1; 807 808 /* Pattern before initial brace */ 809 if (brace_start > 0) { 810 memcpy(cp, pattern, brace_start); 811 o = brace_start; 812 } 813 /* Current braced selection */ 814 if (sel_end - sel_start > 0) { 815 memcpy(cp + o, pattern + sel_start, 816 sel_end - sel_start); 817 o += sel_end - sel_start; 818 } 819 /* Remainder of pattern after closing brace */ 820 if (tail_len > 0) { 821 memcpy(cp + o, pattern + brace_end + 1, tail_len); 822 o += tail_len; 823 } 824 cp[o] = '\0'; 825 if (append(cp, patternsp, npatternsp) != 0) { 826 free(cp); 827 return -1; 828 } 829 return 0; 830 } 831 832 /* 833 * Expand the first encountered brace in pattern, appending the expanded 834 * patterns it yielded to the *patternsp array. 835 * 836 * Returns 0 on success or -1 on allocation failure. 837 * 838 * Signals whether expansion was performed via *expanded and whether 839 * pattern was invalid via *invalid. 840 */ 841 static int 842 brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, 843 int *expanded, int *invalid) 844 { 845 int i; 846 int in_bracket, brace_start, brace_end, brace_level; 847 int sel_start, sel_end; 848 849 *invalid = *expanded = 0; 850 851 if (find_brace(pattern, &brace_start, &brace_end) != 0) { 852 *invalid = 1; 853 return 0; 854 } else if (brace_start == -1) 855 return 0; 856 857 in_bracket = brace_level = 0; 858 for (i = sel_start = brace_start + 1; i < brace_end; i++) { 859 switch (pattern[i]) { 860 case '{': 861 if (in_bracket) 862 break; 863 brace_level++; 864 break; 865 case '}': 866 if (in_bracket) 867 break; 868 brace_level--; 869 break; 870 case '[': 871 in_bracket = 1; 872 break; 873 case ']': 874 in_bracket = 0; 875 break; 876 case '\\': 877 if (i < brace_end - 1) 878 i++; /* skip */ 879 break; 880 } 881 if (pattern[i] == ',' || i == brace_end - 1) { 882 if (in_bracket || brace_level > 0) 883 continue; 884 /* End of a selection, emit an expanded pattern */ 885 886 /* Adjust end index for last selection */ 887 sel_end = (i == brace_end - 1) ? brace_end : i; 888 if (emit_expansion(pattern, brace_start, brace_end, 889 sel_start, sel_end, patternsp, npatternsp) != 0) 890 return -1; 891 /* move on to the next selection */ 892 sel_start = i + 1; 893 continue; 894 } 895 } 896 if (in_bracket || brace_level > 0) { 897 *invalid = 1; 898 return 0; 899 } 900 /* success */ 901 *expanded = 1; 902 return 0; 903 } 904 905 /* Expand braces from pattern. Returns 0 on success, -1 on failure */ 906 static int 907 brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) 908 { 909 char *cp, *cp2, **active = NULL, **done = NULL; 910 size_t i, nactive = 0, ndone = 0; 911 int ret = -1, invalid = 0, expanded = 0; 912 913 *patternsp = NULL; 914 *npatternsp = 0; 915 916 /* Start the worklist with the original pattern */ 917 if ((cp = strdup(pattern)) == NULL) 918 return -1; 919 if (append(cp, &active, &nactive) != 0) { 920 free(cp); 921 return -1; 922 } 923 while (nactive > 0) { 924 cp = active[nactive - 1]; 925 nactive--; 926 if (brace_expand_one(cp, &active, &nactive, 927 &expanded, &invalid) == -1) { 928 free(cp); 929 goto fail; 930 } 931 if (invalid) 932 fatal_f("invalid brace pattern \"%s\"", cp); 933 if (expanded) { 934 /* 935 * Current entry expanded to new entries on the 936 * active list; discard the progenitor pattern. 937 */ 938 free(cp); 939 continue; 940 } 941 /* 942 * Pattern did not expand; append the finename component to 943 * the completed list 944 */ 945 if ((cp2 = strrchr(cp, '/')) != NULL) 946 *cp2++ = '\0'; 947 else 948 cp2 = cp; 949 if (append(xstrdup(cp2), &done, &ndone) != 0) { 950 free(cp); 951 goto fail; 952 } 953 free(cp); 954 } 955 /* success */ 956 *patternsp = done; 957 *npatternsp = ndone; 958 done = NULL; 959 ndone = 0; 960 ret = 0; 961 fail: 962 for (i = 0; i < nactive; i++) 963 free(active[i]); 964 free(active); 965 for (i = 0; i < ndone; i++) 966 free(done[i]); 967 free(done); 968 return ret; 969 } 970 971 static struct sftp_conn * 972 do_sftp_connect(char *host, char *user, int port, char *sftp_direct, 973 int *reminp, int *remoutp, int *pidp) 974 { 975 if (sftp_direct == NULL) { 976 if (do_cmd(ssh_program, host, user, port, 1, "sftp", 977 reminp, remoutp, pidp) < 0) 978 return NULL; 979 980 } else { 981 freeargs(&args); 982 addargs(&args, "sftp-server"); 983 if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", 984 reminp, remoutp, pidp) < 0) 985 return NULL; 986 } 987 return sftp_init(*reminp, *remoutp, 988 sftp_copy_buflen, sftp_nrequests, limit_kbps); 989 } 990 991 static void 992 toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 993 { 994 char *suser = NULL, *host = NULL, *src = NULL; 995 char *bp, *tuser, *thost, *targ; 996 int sport = -1, tport = -1; 997 struct sftp_conn *conn = NULL, *conn2 = NULL; 998 arglist alist; 999 int i, r, status; 1000 struct stat sb; 1001 u_int j; 1002 1003 memset(&alist, '\0', sizeof(alist)); 1004 alist.list = NULL; 1005 1006 /* Parse target */ 1007 r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ); 1008 if (r == -1) { 1009 fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]); 1010 ++errs; 1011 goto out; 1012 } 1013 if (r != 0) { 1014 if (parse_user_host_path(argv[argc - 1], &tuser, &thost, 1015 &targ) == -1) { 1016 fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]); 1017 ++errs; 1018 goto out; 1019 } 1020 } 1021 1022 /* Parse source files */ 1023 for (i = 0; i < argc - 1; i++) { 1024 free(suser); 1025 free(host); 1026 free(src); 1027 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1028 if (r == -1) { 1029 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1030 ++errs; 1031 continue; 1032 } 1033 if (r != 0) { 1034 parse_user_host_path(argv[i], &suser, &host, &src); 1035 } 1036 if (suser != NULL && !okname(suser)) { 1037 ++errs; 1038 continue; 1039 } 1040 if (host && throughlocal) { /* extended remote to remote */ 1041 if (mode == MODE_SFTP) { 1042 if (remin == -1) { 1043 /* Connect to dest now */ 1044 conn = do_sftp_connect(thost, tuser, 1045 tport, sftp_direct, 1046 &remin, &remout, &do_cmd_pid); 1047 if (conn == NULL) { 1048 fatal("Unable to open " 1049 "destination connection"); 1050 } 1051 debug3_f("origin in %d out %d pid %ld", 1052 remin, remout, (long)do_cmd_pid); 1053 } 1054 /* 1055 * XXX remember suser/host/sport and only 1056 * reconnect if they change between arguments. 1057 * would save reconnections for cases like 1058 * scp -3 hosta:/foo hosta:/bar hostb: 1059 */ 1060 /* Connect to origin now */ 1061 conn2 = do_sftp_connect(host, suser, 1062 sport, sftp_direct, 1063 &remin2, &remout2, &do_cmd_pid2); 1064 if (conn2 == NULL) { 1065 fatal("Unable to open " 1066 "source connection"); 1067 } 1068 debug3_f("destination in %d out %d pid %ld", 1069 remin2, remout2, (long)do_cmd_pid2); 1070 throughlocal_sftp(conn2, conn, src, targ); 1071 (void) close(remin2); 1072 (void) close(remout2); 1073 remin2 = remout2 = -1; 1074 if (waitpid(do_cmd_pid2, &status, 0) == -1) 1075 ++errs; 1076 else if (!WIFEXITED(status) || 1077 WEXITSTATUS(status) != 0) 1078 ++errs; 1079 do_cmd_pid2 = -1; 1080 continue; 1081 } else { 1082 xasprintf(&bp, "%s -f %s%s", cmd, 1083 *src == '-' ? "-- " : "", src); 1084 if (do_cmd(ssh_program, host, suser, sport, 0, 1085 bp, &remin, &remout, &do_cmd_pid) < 0) 1086 exit(1); 1087 free(bp); 1088 xasprintf(&bp, "%s -t %s%s", cmd, 1089 *targ == '-' ? "-- " : "", targ); 1090 if (do_cmd2(thost, tuser, tport, bp, 1091 remin, remout) < 0) 1092 exit(1); 1093 free(bp); 1094 (void) close(remin); 1095 (void) close(remout); 1096 remin = remout = -1; 1097 } 1098 } else if (host) { /* standard remote to remote */ 1099 /* 1100 * Second remote user is passed to first remote side 1101 * via scp command-line. Ensure it contains no obvious 1102 * shell characters. 1103 */ 1104 if (tuser != NULL && !okname(tuser)) { 1105 ++errs; 1106 continue; 1107 } 1108 if (tport != -1 && tport != SSH_DEFAULT_PORT) { 1109 /* This would require the remote support URIs */ 1110 fatal("target port not supported with two " 1111 "remote hosts and the -R option"); 1112 } 1113 1114 freeargs(&alist); 1115 addargs(&alist, "%s", ssh_program); 1116 addargs(&alist, "-x"); 1117 addargs(&alist, "-oClearAllForwardings=yes"); 1118 addargs(&alist, "-n"); 1119 for (j = 0; j < remote_remote_args.num; j++) { 1120 addargs(&alist, "%s", 1121 remote_remote_args.list[j]); 1122 } 1123 1124 if (sport != -1) { 1125 addargs(&alist, "-p"); 1126 addargs(&alist, "%d", sport); 1127 } 1128 if (suser) { 1129 addargs(&alist, "-l"); 1130 addargs(&alist, "%s", suser); 1131 } 1132 addargs(&alist, "--"); 1133 addargs(&alist, "%s", host); 1134 addargs(&alist, "%s", cmd); 1135 addargs(&alist, "%s", src); 1136 addargs(&alist, "%s%s%s:%s", 1137 tuser ? tuser : "", tuser ? "@" : "", 1138 thost, targ); 1139 if (do_local_cmd(&alist) != 0) 1140 errs = 1; 1141 } else { /* local to remote */ 1142 if (mode == MODE_SFTP) { 1143 /* no need to glob: already done by shell */ 1144 if (stat(argv[i], &sb) != 0) { 1145 fatal("stat local \"%s\": %s", argv[i], 1146 strerror(errno)); 1147 } 1148 if (remin == -1) { 1149 /* Connect to remote now */ 1150 conn = do_sftp_connect(thost, tuser, 1151 tport, sftp_direct, 1152 &remin, &remout, &do_cmd_pid); 1153 if (conn == NULL) { 1154 fatal("Unable to open sftp " 1155 "connection"); 1156 } 1157 } 1158 1159 /* The protocol */ 1160 source_sftp(1, argv[i], targ, conn); 1161 continue; 1162 } 1163 /* SCP */ 1164 if (remin == -1) { 1165 xasprintf(&bp, "%s -t %s%s", cmd, 1166 *targ == '-' ? "-- " : "", targ); 1167 if (do_cmd(ssh_program, thost, tuser, tport, 0, 1168 bp, &remin, &remout, &do_cmd_pid) < 0) 1169 exit(1); 1170 if (response() < 0) 1171 exit(1); 1172 free(bp); 1173 } 1174 source(1, argv + i); 1175 } 1176 } 1177 out: 1178 if (mode == MODE_SFTP) 1179 free(conn); 1180 free(tuser); 1181 free(thost); 1182 free(targ); 1183 free(suser); 1184 free(host); 1185 free(src); 1186 } 1187 1188 static void 1189 tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) 1190 { 1191 char *bp, *host = NULL, *suser = NULL, *src = NULL; 1192 arglist alist; 1193 struct sftp_conn *conn = NULL; 1194 int i, r, sport = -1; 1195 1196 memset(&alist, '\0', sizeof(alist)); 1197 alist.list = NULL; 1198 1199 for (i = 0; i < argc - 1; i++) { 1200 free(suser); 1201 free(host); 1202 free(src); 1203 r = parse_scp_uri(argv[i], &suser, &host, &sport, &src); 1204 if (r == -1) { 1205 fmprintf(stderr, "%s: invalid uri\n", argv[i]); 1206 ++errs; 1207 continue; 1208 } 1209 if (r != 0) 1210 parse_user_host_path(argv[i], &suser, &host, &src); 1211 if (suser != NULL && !okname(suser)) { 1212 ++errs; 1213 continue; 1214 } 1215 if (!host) { /* Local to local. */ 1216 freeargs(&alist); 1217 addargs(&alist, "%s", _PATH_CP); 1218 if (iamrecursive) 1219 addargs(&alist, "-r"); 1220 if (pflag) 1221 addargs(&alist, "-p"); 1222 addargs(&alist, "--"); 1223 addargs(&alist, "%s", argv[i]); 1224 addargs(&alist, "%s", argv[argc-1]); 1225 if (do_local_cmd(&alist)) 1226 ++errs; 1227 continue; 1228 } 1229 /* Remote to local. */ 1230 if (mode == MODE_SFTP) { 1231 conn = do_sftp_connect(host, suser, sport, 1232 sftp_direct, &remin, &remout, &do_cmd_pid); 1233 if (conn == NULL) { 1234 error("sftp connection failed"); 1235 ++errs; 1236 continue; 1237 } 1238 1239 /* The protocol */ 1240 sink_sftp(1, argv[argc - 1], src, conn); 1241 1242 free(conn); 1243 (void) close(remin); 1244 (void) close(remout); 1245 remin = remout = -1; 1246 continue; 1247 } 1248 /* SCP */ 1249 xasprintf(&bp, "%s -f %s%s", 1250 cmd, *src == '-' ? "-- " : "", src); 1251 if (do_cmd(ssh_program, host, suser, sport, 0, bp, 1252 &remin, &remout, &do_cmd_pid) < 0) { 1253 free(bp); 1254 ++errs; 1255 continue; 1256 } 1257 free(bp); 1258 sink(1, argv + argc - 1, src); 1259 (void) close(remin); 1260 remin = remout = -1; 1261 } 1262 free(suser); 1263 free(host); 1264 free(src); 1265 } 1266 1267 /* Prepare remote path, handling ~ by assuming cwd is the homedir */ 1268 static char * 1269 prepare_remote_path(struct sftp_conn *conn, const char *path) 1270 { 1271 size_t nslash; 1272 1273 /* Handle ~ prefixed paths */ 1274 if (*path == '\0' || strcmp(path, "~") == 0) 1275 return xstrdup("."); 1276 if (*path != '~') 1277 return xstrdup(path); 1278 if (strncmp(path, "~/", 2) == 0) { 1279 if ((nslash = strspn(path + 2, "/")) == strlen(path + 2)) 1280 return xstrdup("."); 1281 return xstrdup(path + 2 + nslash); 1282 } 1283 if (sftp_can_expand_path(conn)) 1284 return sftp_expand_path(conn, path); 1285 /* No protocol extension */ 1286 error("server expand-path extension is required " 1287 "for ~user paths in SFTP mode"); 1288 return NULL; 1289 } 1290 1291 void 1292 source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) 1293 { 1294 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1295 int src_is_dir, target_is_dir; 1296 Attrib a; 1297 struct stat st; 1298 1299 memset(&a, '\0', sizeof(a)); 1300 if (stat(src, &st) != 0) 1301 fatal("stat local \"%s\": %s", src, strerror(errno)); 1302 src_is_dir = S_ISDIR(st.st_mode); 1303 if ((filename = basename(src)) == NULL) 1304 fatal("basename \"%s\": %s", src, strerror(errno)); 1305 1306 /* 1307 * No need to glob here - the local shell already took care of 1308 * the expansions 1309 */ 1310 if ((target = prepare_remote_path(conn, targ)) == NULL) 1311 cleanup_exit(255); 1312 target_is_dir = sftp_remote_is_dir(conn, target); 1313 if (targetshouldbedirectory && !target_is_dir) { 1314 debug("target directory \"%s\" does not exist", target); 1315 a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS; 1316 a.perm = st.st_mode | 0700; /* ensure writable */ 1317 if (sftp_mkdir(conn, target, &a, 1) != 0) 1318 cleanup_exit(255); /* error already logged */ 1319 target_is_dir = 1; 1320 } 1321 if (target_is_dir) 1322 abs_dst = sftp_path_append(target, filename); 1323 else { 1324 abs_dst = target; 1325 target = NULL; 1326 } 1327 debug3_f("copying local %s to remote %s", src, abs_dst); 1328 1329 if (src_is_dir && iamrecursive) { 1330 if (sftp_upload_dir(conn, src, abs_dst, pflag, 1331 SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) { 1332 error("failed to upload directory %s to %s", src, targ); 1333 errs = 1; 1334 } 1335 } else if (sftp_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) { 1336 error("failed to upload file %s to %s", src, targ); 1337 errs = 1; 1338 } 1339 1340 free(abs_dst); 1341 free(target); 1342 } 1343 1344 void 1345 source(int argc, char **argv) 1346 { 1347 struct stat stb; 1348 static BUF buffer; 1349 BUF *bp; 1350 off_t i, statbytes; 1351 size_t amt, nr; 1352 int fd = -1, haderr, indx; 1353 char *last, *name, buf[PATH_MAX + 128], encname[PATH_MAX]; 1354 int len; 1355 1356 for (indx = 0; indx < argc; ++indx) { 1357 fd = -1; 1358 name = argv[indx]; 1359 statbytes = 0; 1360 len = strlen(name); 1361 while (len > 1 && name[len-1] == '/') 1362 name[--len] = '\0'; 1363 if ((fd = open(name, O_RDONLY|O_NONBLOCK)) == -1) 1364 goto syserr; 1365 if (strchr(name, '\n') != NULL) { 1366 strvisx(encname, name, len, VIS_NL); 1367 name = encname; 1368 } 1369 if (fstat(fd, &stb) == -1) { 1370 syserr: run_err("%s: %s", name, strerror(errno)); 1371 goto next; 1372 } 1373 if (stb.st_size < 0) { 1374 run_err("%s: %s", name, "Negative file size"); 1375 goto next; 1376 } 1377 unset_nonblock(fd); 1378 switch (stb.st_mode & S_IFMT) { 1379 case S_IFREG: 1380 break; 1381 case S_IFDIR: 1382 if (iamrecursive) { 1383 rsource(name, &stb); 1384 goto next; 1385 } 1386 /* FALLTHROUGH */ 1387 default: 1388 run_err("%s: not a regular file", name); 1389 goto next; 1390 } 1391 if ((last = strrchr(name, '/')) == NULL) 1392 last = name; 1393 else 1394 ++last; 1395 curfile = last; 1396 if (pflag) { 1397 if (do_times(remout, verbose_mode, &stb) < 0) 1398 goto next; 1399 } 1400 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 1401 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 1402 (u_int) (stb.st_mode & FILEMODEMASK), 1403 (long long)stb.st_size, last); 1404 if (verbose_mode) 1405 fmprintf(stderr, "Sending file modes: %s", buf); 1406 (void) atomicio(vwrite, remout, buf, strlen(buf)); 1407 if (response() < 0) 1408 goto next; 1409 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 1410 next: if (fd != -1) { 1411 (void) close(fd); 1412 fd = -1; 1413 } 1414 continue; 1415 } 1416 if (showprogress) 1417 start_progress_meter(curfile, stb.st_size, &statbytes); 1418 set_nonblock(remout); 1419 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 1420 amt = bp->cnt; 1421 if (i + (off_t)amt > stb.st_size) 1422 amt = stb.st_size - i; 1423 if (!haderr) { 1424 if ((nr = atomicio(read, fd, 1425 bp->buf, amt)) != amt) { 1426 haderr = errno; 1427 memset(bp->buf + nr, 0, amt - nr); 1428 } 1429 } 1430 /* Keep writing after error to retain sync */ 1431 if (haderr) { 1432 (void)atomicio(vwrite, remout, bp->buf, amt); 1433 memset(bp->buf, 0, amt); 1434 continue; 1435 } 1436 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 1437 &statbytes) != amt) 1438 haderr = errno; 1439 } 1440 unset_nonblock(remout); 1441 1442 if (fd != -1) { 1443 if (close(fd) == -1 && !haderr) 1444 haderr = errno; 1445 fd = -1; 1446 } 1447 if (!haderr) 1448 (void) atomicio(vwrite, remout, empty, 1); 1449 else 1450 run_err("%s: %s", name, strerror(haderr)); 1451 (void) response(); 1452 if (showprogress) 1453 stop_progress_meter(); 1454 } 1455 } 1456 1457 void 1458 rsource(char *name, struct stat *statp) 1459 { 1460 DIR *dirp; 1461 struct dirent *dp; 1462 char *last, *vect[1], path[PATH_MAX + 20]; 1463 1464 if (!(dirp = opendir(name))) { 1465 run_err("%s: %s", name, strerror(errno)); 1466 return; 1467 } 1468 last = strrchr(name, '/'); 1469 if (last == NULL) 1470 last = name; 1471 else 1472 last++; 1473 if (pflag) { 1474 if (do_times(remout, verbose_mode, statp) < 0) { 1475 closedir(dirp); 1476 return; 1477 } 1478 } 1479 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 1480 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 1481 if (verbose_mode) 1482 fmprintf(stderr, "Entering directory: %s", path); 1483 (void) atomicio(vwrite, remout, path, strlen(path)); 1484 if (response() < 0) { 1485 closedir(dirp); 1486 return; 1487 } 1488 while ((dp = readdir(dirp)) != NULL) { 1489 if (dp->d_ino == 0) 1490 continue; 1491 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 1492 continue; 1493 if ((size_t)snprintf(path, sizeof path, "%s/%s", 1494 name, dp->d_name) >= sizeof path) { 1495 run_err("%s/%s: name too long", name, dp->d_name); 1496 continue; 1497 } 1498 vect[0] = path; 1499 source(1, vect); 1500 } 1501 (void) closedir(dirp); 1502 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 1503 (void) response(); 1504 } 1505 1506 void 1507 sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) 1508 { 1509 char *abs_src = NULL; 1510 char *abs_dst = NULL; 1511 glob_t g; 1512 char *filename, *tmp = NULL; 1513 int i, r, err = 0, dst_is_dir; 1514 struct stat st; 1515 1516 memset(&g, 0, sizeof(g)); 1517 1518 /* 1519 * Here, we need remote glob as SFTP can not depend on remote shell 1520 * expansions 1521 */ 1522 if ((abs_src = prepare_remote_path(conn, src)) == NULL) { 1523 err = -1; 1524 goto out; 1525 } 1526 1527 debug3_f("copying remote %s to local %s", abs_src, dst); 1528 if ((r = sftp_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK, 1529 NULL, &g)) != 0) { 1530 if (r == GLOB_NOSPACE) 1531 error("%s: too many glob matches", src); 1532 else 1533 error("%s: %s", src, strerror(ENOENT)); 1534 err = -1; 1535 goto out; 1536 } 1537 1538 /* Did we actually get any matches back from the glob? */ 1539 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { 1540 /* 1541 * If nothing matched but a path returned, then it's probably 1542 * a GLOB_NOCHECK result. Check whether the unglobbed path 1543 * exists so we can give a nice error message early. 1544 */ 1545 if (sftp_stat(conn, g.gl_pathv[0], 1, NULL) != 0) { 1546 error("%s: %s", src, strerror(ENOENT)); 1547 err = -1; 1548 goto out; 1549 } 1550 } 1551 1552 if ((r = stat(dst, &st)) != 0) 1553 debug2_f("stat local \"%s\": %s", dst, strerror(errno)); 1554 dst_is_dir = r == 0 && S_ISDIR(st.st_mode); 1555 1556 if (g.gl_matchc > 1 && !dst_is_dir) { 1557 if (r == 0) { 1558 error("Multiple files match pattern, but destination " 1559 "\"%s\" is not a directory", dst); 1560 err = -1; 1561 goto out; 1562 } 1563 debug2_f("creating destination \"%s\"", dst); 1564 if (mkdir(dst, 0777) != 0) { 1565 error("local mkdir \"%s\": %s", dst, strerror(errno)); 1566 err = -1; 1567 goto out; 1568 } 1569 dst_is_dir = 1; 1570 } 1571 1572 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1573 tmp = xstrdup(g.gl_pathv[i]); 1574 if ((filename = basename(tmp)) == NULL) { 1575 error("basename %s: %s", tmp, strerror(errno)); 1576 err = -1; 1577 goto out; 1578 } 1579 1580 if (dst_is_dir) 1581 abs_dst = sftp_path_append(dst, filename); 1582 else 1583 abs_dst = xstrdup(dst); 1584 1585 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 1586 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 1587 if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst, 1588 NULL, pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1) 1589 err = -1; 1590 } else { 1591 if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL, 1592 pflag, 0, 0, 1) == -1) 1593 err = -1; 1594 } 1595 free(abs_dst); 1596 abs_dst = NULL; 1597 free(tmp); 1598 tmp = NULL; 1599 } 1600 1601 out: 1602 free(abs_src); 1603 free(tmp); 1604 globfree(&g); 1605 if (err == -1) 1606 errs = 1; 1607 } 1608 1609 1610 #define TYPE_OVERFLOW(type, val) \ 1611 ((sizeof(type) == 4 && (val) > INT32_MAX) || \ 1612 (sizeof(type) == 8 && (val) > INT64_MAX) || \ 1613 (sizeof(type) != 4 && sizeof(type) != 8)) 1614 1615 void 1616 sink(int argc, char **argv, const char *src) 1617 { 1618 static BUF buffer; 1619 struct stat stb; 1620 BUF *bp; 1621 off_t i; 1622 size_t j, count; 1623 int amt, exists, first, ofd; 1624 mode_t mode, omode, mask; 1625 off_t size, statbytes; 1626 unsigned long long ull; 1627 int setimes, targisdir, wrerr; 1628 char ch, *cp, *np, *targ, *vect[1], buf[2048], visbuf[2048]; 1629 const char *why; 1630 char **patterns = NULL; 1631 size_t n, npatterns = 0; 1632 struct timeval tv[2]; 1633 1634 #define atime tv[0] 1635 #define mtime tv[1] 1636 #define SCREWUP(str) { why = str; goto screwup; } 1637 1638 if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0)) 1639 SCREWUP("Unexpected off_t/time_t size"); 1640 1641 setimes = targisdir = 0; 1642 mask = umask(0); 1643 if (!pflag) 1644 (void) umask(mask); 1645 if (argc != 1) { 1646 run_err("ambiguous target"); 1647 exit(1); 1648 } 1649 targ = *argv; 1650 if (targetshouldbedirectory) 1651 verifydir(targ); 1652 1653 (void) atomicio(vwrite, remout, empty, 1); 1654 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 1655 targisdir = 1; 1656 if (src != NULL && !iamrecursive && !Tflag) { 1657 /* 1658 * Prepare to try to restrict incoming filenames to match 1659 * the requested destination file glob. 1660 */ 1661 if (brace_expand(src, &patterns, &npatterns) != 0) 1662 fatal_f("could not expand pattern"); 1663 } 1664 for (first = 1;; first = 0) { 1665 cp = buf; 1666 if (atomicio(read, remin, cp, 1) != 1) 1667 goto done; 1668 if (*cp++ == '\n') 1669 SCREWUP("unexpected <newline>"); 1670 do { 1671 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1672 SCREWUP("lost connection"); 1673 *cp++ = ch; 1674 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 1675 *cp = 0; 1676 if (verbose_mode) 1677 fmprintf(stderr, "Sink: %s", buf); 1678 1679 if (buf[0] == '\01' || buf[0] == '\02') { 1680 if (iamremote == 0) { 1681 (void) snmprintf(visbuf, sizeof(visbuf), 1682 NULL, "%s", buf + 1); 1683 (void) atomicio(vwrite, STDERR_FILENO, 1684 visbuf, strlen(visbuf)); 1685 } 1686 if (buf[0] == '\02') 1687 exit(1); 1688 ++errs; 1689 continue; 1690 } 1691 if (buf[0] == 'E') { 1692 (void) atomicio(vwrite, remout, __UNCONST(""), 1); 1693 goto done; 1694 } 1695 if (ch == '\n') 1696 *--cp = 0; 1697 1698 cp = buf; 1699 if (*cp == 'T') { 1700 setimes++; 1701 cp++; 1702 if (!isdigit((unsigned char)*cp)) 1703 SCREWUP("mtime.sec not present"); 1704 ull = strtoull(cp, &cp, 10); 1705 if (!cp || *cp++ != ' ') 1706 SCREWUP("mtime.sec not delimited"); 1707 if (TYPE_OVERFLOW(time_t, ull)) 1708 setimes = 0; /* out of range */ 1709 mtime.tv_sec = ull; 1710 mtime.tv_usec = strtol(cp, &cp, 10); 1711 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 1712 mtime.tv_usec > 999999) 1713 SCREWUP("mtime.usec not delimited"); 1714 if (!isdigit((unsigned char)*cp)) 1715 SCREWUP("atime.sec not present"); 1716 ull = strtoull(cp, &cp, 10); 1717 if (!cp || *cp++ != ' ') 1718 SCREWUP("atime.sec not delimited"); 1719 if (TYPE_OVERFLOW(time_t, ull)) 1720 setimes = 0; /* out of range */ 1721 atime.tv_sec = ull; 1722 atime.tv_usec = strtol(cp, &cp, 10); 1723 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 1724 atime.tv_usec > 999999) 1725 SCREWUP("atime.usec not delimited"); 1726 (void) atomicio(vwrite, remout, empty, 1); 1727 continue; 1728 } 1729 if (*cp != 'C' && *cp != 'D') { 1730 /* 1731 * Check for the case "rcp remote:foo\* local:bar". 1732 * In this case, the line "No match." can be returned 1733 * by the shell before the rcp command on the remote is 1734 * executed so the ^Aerror_message convention isn't 1735 * followed. 1736 */ 1737 if (first) { 1738 run_err("%s", cp); 1739 exit(1); 1740 } 1741 SCREWUP("expected control record"); 1742 } 1743 mode = 0; 1744 for (++cp; cp < buf + 5; cp++) { 1745 if (*cp < '0' || *cp > '7') 1746 SCREWUP("bad mode"); 1747 mode = (mode << 3) | (*cp - '0'); 1748 } 1749 if (!pflag) 1750 mode &= ~mask; 1751 if (*cp++ != ' ') 1752 SCREWUP("mode not delimited"); 1753 1754 if (!isdigit((unsigned char)*cp)) 1755 SCREWUP("size not present"); 1756 ull = strtoull(cp, &cp, 10); 1757 if (!cp || *cp++ != ' ') 1758 SCREWUP("size not delimited"); 1759 if (TYPE_OVERFLOW(off_t, ull)) 1760 SCREWUP("size out of range"); 1761 size = (off_t)ull; 1762 1763 if (*cp == '\0' || strchr(cp, '/') != NULL || 1764 strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { 1765 run_err("error: unexpected filename: %s", cp); 1766 exit(1); 1767 } 1768 if (npatterns > 0) { 1769 for (n = 0; n < npatterns; n++) { 1770 if (strcmp(patterns[n], cp) == 0 || 1771 fnmatch(patterns[n], cp, 0) == 0) 1772 break; 1773 } 1774 if (n >= npatterns) { 1775 debug2_f("incoming filename \"%s\" does not " 1776 "match any of %zu expected patterns", cp, 1777 npatterns); 1778 for (n = 0; n < npatterns; n++) { 1779 debug3_f("expected pattern %zu: \"%s\"", 1780 n, patterns[n]); 1781 } 1782 SCREWUP("filename does not match request"); 1783 } 1784 } 1785 if (targisdir) { 1786 static char *namebuf; 1787 static size_t cursize; 1788 size_t need; 1789 1790 need = strlen(targ) + strlen(cp) + 250; 1791 if (need > cursize) { 1792 free(namebuf); 1793 namebuf = xmalloc(need); 1794 cursize = need; 1795 } 1796 (void) snprintf(namebuf, need, "%s%s%s", targ, 1797 strcmp(targ, "/") ? "/" : "", cp); 1798 np = namebuf; 1799 } else 1800 np = targ; 1801 curfile = cp; 1802 exists = stat(np, &stb) == 0; 1803 if (buf[0] == 'D') { 1804 int mod_flag = pflag; 1805 if (!iamrecursive) 1806 SCREWUP("received directory without -r"); 1807 if (exists) { 1808 if (!S_ISDIR(stb.st_mode)) { 1809 errno = ENOTDIR; 1810 goto bad; 1811 } 1812 if (pflag) 1813 (void) chmod(np, mode); 1814 } else { 1815 /* Handle copying from a read-only directory */ 1816 mod_flag = 1; 1817 if (mkdir(np, mode | S_IRWXU) == -1) 1818 goto bad; 1819 } 1820 vect[0] = xstrdup(np); 1821 sink(1, vect, src); 1822 if (setimes) { 1823 setimes = 0; 1824 (void) utimes(vect[0], tv); 1825 } 1826 if (mod_flag) 1827 (void) chmod(vect[0], mode); 1828 free(vect[0]); 1829 continue; 1830 } 1831 omode = mode; 1832 mode |= S_IWUSR; 1833 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) == -1) { 1834 bad: run_err("%s: %s", np, strerror(errno)); 1835 continue; 1836 } 1837 (void) atomicio(vwrite, remout, empty, 1); 1838 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1839 (void) close(ofd); 1840 continue; 1841 } 1842 cp = bp->buf; 1843 wrerr = 0; 1844 1845 /* 1846 * NB. do not use run_err() unless immediately followed by 1847 * exit() below as it may send a spurious reply that might 1848 * desyncronise us from the peer. Use note_err() instead. 1849 */ 1850 statbytes = 0; 1851 if (showprogress) 1852 start_progress_meter(curfile, size, &statbytes); 1853 set_nonblock(remin); 1854 for (count = i = 0; i < size; i += bp->cnt) { 1855 amt = bp->cnt; 1856 if (i + amt > size) 1857 amt = size - i; 1858 count += amt; 1859 do { 1860 j = atomicio6(read, remin, cp, amt, 1861 scpio, &statbytes); 1862 if (j == 0) { 1863 run_err("%s", j != EPIPE ? 1864 strerror(errno) : 1865 "dropped connection"); 1866 exit(1); 1867 } 1868 amt -= j; 1869 cp += j; 1870 } while (amt > 0); 1871 1872 if (count == bp->cnt) { 1873 /* Keep reading so we stay sync'd up. */ 1874 if (!wrerr) { 1875 if (atomicio(vwrite, ofd, bp->buf, 1876 count) != count) { 1877 note_err("%s: %s", np, 1878 strerror(errno)); 1879 wrerr = 1; 1880 } 1881 } 1882 count = 0; 1883 cp = bp->buf; 1884 } 1885 } 1886 unset_nonblock(remin); 1887 if (count != 0 && !wrerr && 1888 atomicio(vwrite, ofd, bp->buf, count) != count) { 1889 note_err("%s: %s", np, strerror(errno)); 1890 wrerr = 1; 1891 } 1892 if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && 1893 ftruncate(ofd, size) != 0) 1894 note_err("%s: truncate: %s", np, strerror(errno)); 1895 if (pflag) { 1896 if (exists || omode != mode) 1897 if (fchmod(ofd, omode)) { 1898 note_err("%s: set mode: %s", 1899 np, strerror(errno)); 1900 } 1901 } else { 1902 if (!exists && omode != mode) 1903 if (fchmod(ofd, omode & ~mask)) { 1904 note_err("%s: set mode: %s", 1905 np, strerror(errno)); 1906 } 1907 } 1908 if (close(ofd) == -1) 1909 note_err("%s: close: %s", np, strerror(errno)); 1910 (void) response(); 1911 if (showprogress) 1912 stop_progress_meter(); 1913 if (setimes && !wrerr) { 1914 setimes = 0; 1915 if (utimes(np, tv) == -1) { 1916 note_err("%s: set times: %s", 1917 np, strerror(errno)); 1918 } 1919 } 1920 /* If no error was noted then signal success for this file */ 1921 if (note_err(NULL) == 0) 1922 (void) atomicio(vwrite, remout, __UNCONST(""), 1); 1923 } 1924 done: 1925 for (n = 0; n < npatterns; n++) 1926 free(patterns[n]); 1927 free(patterns); 1928 return; 1929 screwup: 1930 for (n = 0; n < npatterns; n++) 1931 free(patterns[n]); 1932 free(patterns); 1933 run_err("protocol error: %s", why); 1934 exit(1); 1935 } 1936 1937 void 1938 throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, 1939 char *src, char *targ) 1940 { 1941 char *target = NULL, *filename = NULL, *abs_dst = NULL; 1942 char *abs_src = NULL, *tmp = NULL; 1943 glob_t g; 1944 int i, r, targetisdir, err = 0; 1945 1946 if ((filename = basename(src)) == NULL) 1947 fatal("basename %s: %s", src, strerror(errno)); 1948 1949 if ((abs_src = prepare_remote_path(from, src)) == NULL || 1950 (target = prepare_remote_path(to, targ)) == NULL) 1951 cleanup_exit(255); 1952 memset(&g, 0, sizeof(g)); 1953 1954 targetisdir = sftp_remote_is_dir(to, target); 1955 if (!targetisdir && targetshouldbedirectory) { 1956 error("%s: destination is not a directory", targ); 1957 err = -1; 1958 goto out; 1959 } 1960 1961 debug3_f("copying remote %s to remote %s", abs_src, target); 1962 if ((r = sftp_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK, 1963 NULL, &g)) != 0) { 1964 if (r == GLOB_NOSPACE) 1965 error("%s: too many glob matches", src); 1966 else 1967 error("%s: %s", src, strerror(ENOENT)); 1968 err = -1; 1969 goto out; 1970 } 1971 1972 /* Did we actually get any matches back from the glob? */ 1973 if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { 1974 /* 1975 * If nothing matched but a path returned, then it's probably 1976 * a GLOB_NOCHECK result. Check whether the unglobbed path 1977 * exists so we can give a nice error message early. 1978 */ 1979 if (sftp_stat(from, g.gl_pathv[0], 1, NULL) != 0) { 1980 error("%s: %s", src, strerror(ENOENT)); 1981 err = -1; 1982 goto out; 1983 } 1984 } 1985 1986 for (i = 0; g.gl_pathv[i] && !interrupted; i++) { 1987 tmp = xstrdup(g.gl_pathv[i]); 1988 if ((filename = basename(tmp)) == NULL) { 1989 error("basename %s: %s", tmp, strerror(errno)); 1990 err = -1; 1991 goto out; 1992 } 1993 1994 if (targetisdir) 1995 abs_dst = sftp_path_append(target, filename); 1996 else 1997 abs_dst = xstrdup(target); 1998 1999 debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); 2000 if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { 2001 if (sftp_crossload_dir(from, to, g.gl_pathv[i], abs_dst, 2002 NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) 2003 err = -1; 2004 } else { 2005 if (sftp_crossload(from, to, g.gl_pathv[i], abs_dst, 2006 NULL, pflag) == -1) 2007 err = -1; 2008 } 2009 free(abs_dst); 2010 abs_dst = NULL; 2011 free(tmp); 2012 tmp = NULL; 2013 } 2014 2015 out: 2016 free(abs_src); 2017 free(abs_dst); 2018 free(target); 2019 free(tmp); 2020 globfree(&g); 2021 if (err == -1) 2022 errs = 1; 2023 } 2024 2025 int 2026 response(void) 2027 { 2028 char ch, *cp, resp, rbuf[2048], visbuf[2048]; 2029 2030 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 2031 lostconn(0); 2032 2033 cp = rbuf; 2034 switch (resp) { 2035 case 0: /* ok */ 2036 return (0); 2037 default: 2038 *cp++ = resp; 2039 /* FALLTHROUGH */ 2040 case 1: /* error, followed by error msg */ 2041 case 2: /* fatal error, "" */ 2042 do { 2043 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 2044 lostconn(0); 2045 *cp++ = ch; 2046 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 2047 2048 if (!iamremote) { 2049 cp[-1] = '\0'; 2050 (void) snmprintf(visbuf, sizeof(visbuf), 2051 NULL, "%s\n", rbuf); 2052 (void) atomicio(vwrite, STDERR_FILENO, 2053 visbuf, strlen(visbuf)); 2054 } 2055 ++errs; 2056 if (resp == 1) 2057 return (-1); 2058 exit(1); 2059 } 2060 /* NOTREACHED */ 2061 } 2062 2063 static void 2064 usage(void) 2065 { 2066 (void) fprintf(stderr, 2067 "usage: scp [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" 2068 " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n" 2069 " [-P port] [-S program] [-X sftp_option] source ... target\n"); 2070 exit(1); 2071 } 2072 2073 void 2074 run_err(const char *fmt,...) 2075 { 2076 static FILE *fp; 2077 va_list ap; 2078 2079 ++errs; 2080 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 2081 (void) fprintf(fp, "%c", 0x01); 2082 (void) fprintf(fp, "scp: "); 2083 va_start(ap, fmt); 2084 (void) vfprintf(fp, fmt, ap); 2085 va_end(ap); 2086 (void) fprintf(fp, "\n"); 2087 (void) fflush(fp); 2088 } 2089 2090 if (!iamremote) { 2091 va_start(ap, fmt); 2092 vfmprintf(stderr, fmt, ap); 2093 va_end(ap); 2094 fprintf(stderr, "\n"); 2095 } 2096 } 2097 2098 /* 2099 * Notes a sink error for sending at the end of a file transfer. Returns 0 if 2100 * no error has been noted or -1 otherwise. Use note_err(NULL) to flush 2101 * any active error at the end of the transfer. 2102 */ 2103 int 2104 note_err(const char *fmt, ...) 2105 { 2106 static char *emsg; 2107 va_list ap; 2108 2109 /* Replay any previously-noted error */ 2110 if (fmt == NULL) { 2111 if (emsg == NULL) 2112 return 0; 2113 run_err("%s", emsg); 2114 free(emsg); 2115 emsg = NULL; 2116 return -1; 2117 } 2118 2119 errs++; 2120 /* Prefer first-noted error */ 2121 if (emsg != NULL) 2122 return -1; 2123 2124 va_start(ap, fmt); 2125 vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); 2126 va_end(ap); 2127 return -1; 2128 } 2129 2130 void 2131 verifydir(char *cp) 2132 { 2133 struct stat stb; 2134 2135 if (!stat(cp, &stb)) { 2136 if (S_ISDIR(stb.st_mode)) 2137 return; 2138 errno = ENOTDIR; 2139 } 2140 run_err("%s: %s", cp, strerror(errno)); 2141 killchild(0); 2142 } 2143 2144 int 2145 okname(char *cp0) 2146 { 2147 int c; 2148 char *cp; 2149 2150 cp = cp0; 2151 do { 2152 c = (int)*cp; 2153 if (c & 0200) 2154 goto bad; 2155 if (!isalpha(c) && !isdigit((unsigned char)c)) { 2156 switch (c) { 2157 case '\'': 2158 case '"': 2159 case '`': 2160 case ' ': 2161 case '#': 2162 goto bad; 2163 default: 2164 break; 2165 } 2166 } 2167 } while (*++cp); 2168 return (1); 2169 2170 bad: fmprintf(stderr, "%s: invalid user name\n", cp0); 2171 return (0); 2172 } 2173 2174 BUF * 2175 allocbuf(BUF *bp, int fd, int blksize) 2176 { 2177 size_t size; 2178 struct stat stb; 2179 2180 if (fstat(fd, &stb) == -1) { 2181 run_err("fstat: %s", strerror(errno)); 2182 return (0); 2183 } 2184 size = ROUNDUP(stb.st_blksize, blksize); 2185 if (size == 0) 2186 size = blksize; 2187 if (bp->cnt >= size) 2188 return (bp); 2189 bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1); 2190 bp->cnt = size; 2191 return (bp); 2192 } 2193 2194 static void 2195 lostconn(int signo) 2196 { 2197 if (!iamremote) 2198 (void)write(STDERR_FILENO, "lost connection\n", 16); 2199 if (signo) 2200 _exit(1); 2201 else 2202 exit(1); 2203 } 2204 2205 void 2206 cleanup_exit(int i) 2207 { 2208 if (remin > 0) 2209 close(remin); 2210 if (remout > 0) 2211 close(remout); 2212 if (remin2 > 0) 2213 close(remin2); 2214 if (remout2 > 0) 2215 close(remout2); 2216 if (do_cmd_pid > 0) 2217 (void)waitpid(do_cmd_pid, NULL, 0); 2218 if (do_cmd_pid2 > 0) 2219 (void)waitpid(do_cmd_pid2, NULL, 0); 2220 exit(i); 2221 } 2222