ftpd.c revision 1.17
1 /* $NetBSD: ftpd.c,v 1.17 1997/03/28 21:55:41 cjs Exp $ */ 2 3 /* 4 * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)ftpd.c 8.5 (Berkeley) 4/28/95"; 45 #else 46 static char rcsid[] = "$NetBSD: ftpd.c,v 1.17 1997/03/28 21:55:41 cjs Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * FTP server. 52 */ 53 #include <sys/param.h> 54 #include <sys/stat.h> 55 #include <sys/ioctl.h> 56 #include <sys/socket.h> 57 #include <sys/wait.h> 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/ip.h> 62 63 #define FTP_NAMES 64 #include <arpa/ftp.h> 65 #include <arpa/inet.h> 66 #include <arpa/telnet.h> 67 68 #include <ctype.h> 69 #include <dirent.h> 70 #include <err.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <glob.h> 74 #include <limits.h> 75 #include <netdb.h> 76 #include <pwd.h> 77 #include <setjmp.h> 78 #include <signal.h> 79 #include <stdio.h> 80 #include <stdlib.h> 81 #include <string.h> 82 #include <syslog.h> 83 #include <time.h> 84 #include <unistd.h> 85 86 #include "pathnames.h" 87 #include "extern.h" 88 89 #if __STDC__ 90 #include <stdarg.h> 91 #else 92 #include <varargs.h> 93 #endif 94 95 static char version[] = "Version 6.00"; 96 97 extern off_t restart_point; 98 extern char cbuf[]; 99 100 struct sockaddr_in ctrl_addr; 101 struct sockaddr_in data_source; 102 struct sockaddr_in data_dest; 103 struct sockaddr_in his_addr; 104 struct sockaddr_in pasv_addr; 105 106 int data; 107 jmp_buf errcatch, urgcatch; 108 int logged_in; 109 struct passwd *pw; 110 int debug; 111 int timeout = 900; /* timeout after 15 minutes of inactivity */ 112 int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */ 113 int logging; 114 int guest; 115 int dochroot; 116 int type; 117 int form; 118 int stru; /* avoid C keyword */ 119 int mode; 120 int usedefault = 1; /* for data transfers */ 121 int pdata = -1; /* for passive mode */ 122 sig_atomic_t transflag; 123 off_t file_size; 124 off_t byte_count; 125 #if !defined(CMASK) || CMASK == 0 126 #undef CMASK 127 #define CMASK 027 128 #endif 129 int defumask = CMASK; /* default umask value */ 130 char tmpline[7]; 131 char hostname[MAXHOSTNAMELEN]; 132 char remotehost[MAXHOSTNAMELEN]; 133 static char ttyline[20]; 134 char *tty = ttyline; /* for klogin */ 135 136 #if defined(KERBEROS) 137 int notickets = 1; 138 char *krbtkfile_env = NULL; 139 #endif 140 141 /* 142 * Timeout intervals for retrying connections 143 * to hosts that don't accept PORT cmds. This 144 * is a kludge, but given the problems with TCP... 145 */ 146 #define SWAITMAX 90 /* wait at most 90 seconds */ 147 #define SWAITINT 5 /* interval between retries */ 148 149 int swaitmax = SWAITMAX; 150 int swaitint = SWAITINT; 151 152 #ifdef HASSETPROCTITLE 153 char proctitle[BUFSIZ]; /* initial part of title */ 154 #endif /* HASSETPROCTITLE */ 155 156 #define LOGCMD(cmd, file) \ 157 if (logging > 1) \ 158 syslog(LOG_INFO,"%s %s%s", cmd, \ 159 *(file) == '/' ? "" : curdir(), file); 160 #define LOGCMD2(cmd, file1, file2) \ 161 if (logging > 1) \ 162 syslog(LOG_INFO,"%s %s%s %s%s", cmd, \ 163 *(file1) == '/' ? "" : curdir(), file1, \ 164 *(file2) == '/' ? "" : curdir(), file2); 165 #define LOGBYTES(cmd, file, cnt) \ 166 if (logging > 1) { \ 167 if (cnt == (off_t)-1) \ 168 syslog(LOG_INFO,"%s %s%s", cmd, \ 169 *(file) == '/' ? "" : curdir(), file); \ 170 else \ 171 syslog(LOG_INFO, "%s %s%s = %qd bytes", \ 172 cmd, (*(file) == '/') ? "" : curdir(), file, cnt); \ 173 } 174 175 static void ack __P((char *)); 176 static void myoob __P((int)); 177 static int checkuser __P((char *, char *)); 178 static FILE *dataconn __P((char *, off_t, char *)); 179 static void dolog __P((struct sockaddr_in *)); 180 static char *curdir __P((void)); 181 static void end_login __P((void)); 182 static FILE *getdatasock __P((char *)); 183 static char *gunique __P((char *)); 184 static void lostconn __P((int)); 185 static int receive_data __P((FILE *, FILE *)); 186 static void send_data __P((FILE *, FILE *, off_t)); 187 static struct passwd * 188 sgetpwnam __P((char *)); 189 static char *sgetsave __P((char *)); 190 191 static char * 192 curdir() 193 { 194 static char path[MAXPATHLEN+1+1]; /* path + '/' + '\0' */ 195 196 if (getcwd(path, sizeof(path)-2) == NULL) 197 return (""); 198 if (path[1] != '\0') /* special case for root dir. */ 199 strcat(path, "/"); 200 /* For guest account, skip / since it's chrooted */ 201 return (guest ? path+1 : path); 202 } 203 204 int 205 main(argc, argv, envp) 206 int argc; 207 char *argv[]; 208 char **envp; 209 { 210 int addrlen, ch, on = 1, tos; 211 char *cp, line[LINE_MAX]; 212 FILE *fd; 213 214 /* 215 * LOG_NDELAY sets up the logging connection immediately, 216 * necessary for anonymous ftp's that chroot and can't do it later. 217 */ 218 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 219 addrlen = sizeof(his_addr); 220 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) { 221 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]); 222 exit(1); 223 } 224 addrlen = sizeof(ctrl_addr); 225 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) { 226 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]); 227 exit(1); 228 } 229 #ifdef IP_TOS 230 tos = IPTOS_LOWDELAY; 231 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) 232 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 233 #endif 234 data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1); 235 debug = 0; 236 237 /* set this here so klogin can use it... */ 238 (void)sprintf(ttyline, "ftp%d", getpid()); 239 240 while ((ch = getopt(argc, argv, "dlt:T:u:v")) != EOF) { 241 switch (ch) { 242 case 'd': 243 debug = 1; 244 break; 245 246 case 'l': 247 logging++; /* > 1 == extra logging */ 248 break; 249 250 case 't': 251 timeout = atoi(optarg); 252 if (maxtimeout < timeout) 253 maxtimeout = timeout; 254 break; 255 256 case 'T': 257 maxtimeout = atoi(optarg); 258 if (timeout > maxtimeout) 259 timeout = maxtimeout; 260 break; 261 262 case 'u': 263 { 264 long val = 0; 265 266 val = strtol(optarg, &optarg, 8); 267 if (*optarg != '\0' || val < 0) 268 warnx("bad value for -u"); 269 else 270 defumask = val; 271 break; 272 } 273 274 case 'v': 275 debug = 1; 276 break; 277 278 default: 279 warnx("unknown flag -%c ignored", optopt); 280 break; 281 } 282 } 283 (void) freopen(_PATH_DEVNULL, "w", stderr); 284 (void) signal(SIGPIPE, lostconn); 285 (void) signal(SIGCHLD, SIG_IGN); 286 if ((long)signal(SIGURG, myoob) < 0) 287 syslog(LOG_ERR, "signal: %m"); 288 289 /* Try to handle urgent data inline */ 290 #ifdef SO_OOBINLINE 291 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0) 292 syslog(LOG_ERR, "setsockopt: %m"); 293 #endif 294 295 #ifdef F_SETOWN 296 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1) 297 syslog(LOG_ERR, "fcntl F_SETOWN: %m"); 298 #endif 299 dolog(&his_addr); 300 /* 301 * Set up default state 302 */ 303 data = -1; 304 type = TYPE_A; 305 form = FORM_N; 306 stru = STRU_F; 307 mode = MODE_S; 308 tmpline[0] = '\0'; 309 310 /* If logins are disabled, print out the message. */ 311 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) { 312 while (fgets(line, sizeof(line), fd) != NULL) { 313 if ((cp = strchr(line, '\n')) != NULL) 314 *cp = '\0'; 315 lreply(530, "%s", line); 316 } 317 (void) fflush(stdout); 318 (void) fclose(fd); 319 reply(530, "System not available."); 320 exit(0); 321 } 322 if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) { 323 while (fgets(line, sizeof(line), fd) != NULL) { 324 if ((cp = strchr(line, '\n')) != NULL) 325 *cp = '\0'; 326 lreply(220, "%s", line); 327 } 328 (void) fflush(stdout); 329 (void) fclose(fd); 330 /* reply(220,) must follow */ 331 } 332 (void) gethostname(hostname, sizeof(hostname)); 333 reply(220, "%s FTP server (%s) ready.", hostname, version); 334 (void) setjmp(errcatch); 335 for (;;) 336 (void) yyparse(); 337 /* NOTREACHED */ 338 } 339 340 static void 341 lostconn(signo) 342 int signo; 343 { 344 345 if (debug) 346 syslog(LOG_DEBUG, "lost connection"); 347 dologout(-1); 348 } 349 350 /* 351 * Helper function for sgetpwnam(). 352 */ 353 static char * 354 sgetsave(s) 355 char *s; 356 { 357 char *new = malloc((unsigned) strlen(s) + 1); 358 359 if (new == NULL) { 360 perror_reply(421, "Local resource failure: malloc"); 361 dologout(1); 362 /* NOTREACHED */ 363 } 364 (void) strcpy(new, s); 365 return (new); 366 } 367 368 /* 369 * Save the result of a getpwnam. Used for USER command, since 370 * the data returned must not be clobbered by any other command 371 * (e.g., globbing). 372 */ 373 static struct passwd * 374 sgetpwnam(name) 375 char *name; 376 { 377 static struct passwd save; 378 struct passwd *p; 379 380 if ((p = getpwnam(name)) == NULL) 381 return (p); 382 if (save.pw_name) { 383 free(save.pw_name); 384 free(save.pw_passwd); 385 free(save.pw_gecos); 386 free(save.pw_dir); 387 free(save.pw_shell); 388 } 389 save = *p; 390 save.pw_name = sgetsave(p->pw_name); 391 save.pw_passwd = sgetsave(p->pw_passwd); 392 save.pw_gecos = sgetsave(p->pw_gecos); 393 save.pw_dir = sgetsave(p->pw_dir); 394 save.pw_shell = sgetsave(p->pw_shell); 395 return (&save); 396 } 397 398 static int login_attempts; /* number of failed login attempts */ 399 static int askpasswd; /* had user command, ask for passwd */ 400 static char curname[10]; /* current USER name */ 401 402 /* 403 * USER command. 404 * Sets global passwd pointer pw if named account exists and is acceptable; 405 * sets askpasswd if a PASS command is expected. If logged in previously, 406 * need to reset state. If name is "ftp" or "anonymous", the name is not in 407 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return. 408 * If account doesn't exist, ask for passwd anyway. Otherwise, check user 409 * requesting login privileges. Disallow anyone who does not have a standard 410 * shell as returned by getusershell(). Disallow anyone mentioned in the file 411 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided. 412 */ 413 void 414 user(name) 415 char *name; 416 { 417 char *cp, *shell; 418 419 if (logged_in) { 420 if (guest) { 421 reply(530, "Can't change user from guest login."); 422 return; 423 } else if (dochroot) { 424 reply(530, "Can't change user from chroot user."); 425 return; 426 } 427 end_login(); 428 } 429 430 guest = 0; 431 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { 432 if (checkuser(_PATH_FTPUSERS, "ftp") || 433 checkuser(_PATH_FTPUSERS, "anonymous")) 434 reply(530, "User %s access denied.", name); 435 else if ((pw = sgetpwnam("ftp")) != NULL) { 436 guest = 1; 437 askpasswd = 1; 438 reply(331, 439 "Guest login ok, type your name as password."); 440 } else 441 reply(530, "User %s unknown.", name); 442 if (!askpasswd && logging) 443 syslog(LOG_NOTICE, 444 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost); 445 return; 446 } 447 if (pw = sgetpwnam(name)) { 448 if ((shell = pw->pw_shell) == NULL || *shell == 0) 449 shell = _PATH_BSHELL; 450 while ((cp = getusershell()) != NULL) 451 if (strcmp(cp, shell) == 0) 452 break; 453 endusershell(); 454 455 if (cp == NULL || checkuser(_PATH_FTPUSERS, name)) { 456 reply(530, "User %s access denied.", name); 457 if (logging) 458 syslog(LOG_NOTICE, 459 "FTP LOGIN REFUSED FROM %s, %s", 460 remotehost, name); 461 pw = (struct passwd *) NULL; 462 return; 463 } 464 } 465 if (logging) 466 strncpy(curname, name, sizeof(curname)-1); 467 #ifdef SKEY 468 if (!skey_haskey(name)) { 469 char *myskey, *skey_keyinfo __P((char *name)); 470 471 myskey = skey_keyinfo(name); 472 reply(331, "Password [%s] for %s required.", 473 myskey ? myskey : "error getting challenge", name); 474 } else 475 #endif 476 reply(331, "Password required for %s.", name); 477 478 askpasswd = 1; 479 /* 480 * Delay before reading passwd after first failed 481 * attempt to slow down passwd-guessing programs. 482 */ 483 if (login_attempts) 484 sleep((unsigned) login_attempts); 485 } 486 487 /* 488 * Check if a user is in the file "fname" 489 */ 490 static int 491 checkuser(fname, name) 492 char *fname; 493 char *name; 494 { 495 FILE *fd; 496 int found = 0; 497 char *p, line[BUFSIZ]; 498 499 if ((fd = fopen(fname, "r")) != NULL) { 500 while (fgets(line, sizeof(line), fd) != NULL) 501 if ((p = strchr(line, '\n')) != NULL) { 502 *p = '\0'; 503 if (line[0] == '#') 504 continue; 505 if (strcmp(line, name) == 0) { 506 found = 1; 507 break; 508 } 509 } 510 (void) fclose(fd); 511 } 512 return (found); 513 } 514 515 /* 516 * Terminate login as previous user, if any, resetting state; 517 * used when USER command is given or login fails. 518 */ 519 static void 520 end_login() 521 { 522 523 (void) seteuid((uid_t)0); 524 if (logged_in) 525 logwtmp(ttyline, "", ""); 526 pw = NULL; 527 logged_in = 0; 528 guest = 0; 529 dochroot = 0; 530 } 531 532 void 533 pass(passwd) 534 char *passwd; 535 { 536 int rval; 537 FILE *fd; 538 539 if (logged_in || askpasswd == 0) { 540 reply(503, "Login with USER first."); 541 return; 542 } 543 askpasswd = 0; 544 if (!guest) { /* "ftp" is only account allowed no password */ 545 if (pw == NULL) { 546 rval = 1; /* failure below */ 547 goto skip; 548 } 549 #if defined(KERBEROS) 550 rval = klogin(pw, "", hostname, passwd); 551 if (rval == 0) 552 goto skip; 553 #endif 554 #ifdef SKEY 555 if (skey_haskey(pw->pw_name) == 0 && 556 (skey_passcheck(pw->pw_name, passwd) != -1)) { 557 rval = 0; 558 goto skip; 559 } 560 #endif 561 /* the strcmp does not catch null passwords! */ 562 if (pw == NULL || *pw->pw_passwd == '\0' || 563 strcmp(crypt(passwd, (pw ? pw->pw_passwd : "xx")), pw->pw_passwd)) { 564 rval = 1; /* failure */ 565 goto skip; 566 } 567 rval = 0; 568 569 skip: 570 /* 571 * If rval == 1, the user failed the authentication check 572 * above. If rval == 0, either Kerberos or local authentication 573 * succeeded. 574 */ 575 if (rval) { 576 reply(530, "Login incorrect."); 577 if (logging) 578 syslog(LOG_NOTICE, 579 "FTP LOGIN FAILED FROM %s, %s", 580 remotehost, curname); 581 pw = NULL; 582 if (login_attempts++ >= 5) { 583 syslog(LOG_NOTICE, 584 "repeated login failures from %s", 585 remotehost); 586 exit(0); 587 } 588 return; 589 } 590 } 591 login_attempts = 0; /* this time successful */ 592 if (setegid((gid_t)pw->pw_gid) < 0) { 593 reply(550, "Can't set gid."); 594 return; 595 } 596 (void) initgroups(pw->pw_name, pw->pw_gid); 597 598 /* open wtmp before chroot */ 599 logwtmp(ttyline, pw->pw_name, remotehost); 600 logged_in = 1; 601 602 dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name); 603 if (guest) { 604 /* 605 * We MUST do a chdir() after the chroot. Otherwise 606 * the old current directory will be accessible as "." 607 * outside the new root! 608 */ 609 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 610 reply(550, "Can't set guest privileges."); 611 goto bad; 612 } 613 } else if (dochroot) { 614 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 615 reply(550, "Can't change root."); 616 goto bad; 617 } 618 } else if (chdir(pw->pw_dir) < 0) { 619 if (chdir("/") < 0) { 620 reply(530, "User %s: can't change directory to %s.", 621 pw->pw_name, pw->pw_dir); 622 goto bad; 623 } else 624 lreply(230, "No directory! Logging in with home=/"); 625 } 626 if (seteuid((uid_t)pw->pw_uid) < 0) { 627 reply(550, "Can't set uid."); 628 goto bad; 629 } 630 /* 631 * Display a login message, if it exists. 632 * N.B. reply(230,) must follow the message. 633 */ 634 if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) { 635 char *cp, line[LINE_MAX]; 636 637 while (fgets(line, sizeof(line), fd) != NULL) { 638 if ((cp = strchr(line, '\n')) != NULL) 639 *cp = '\0'; 640 lreply(230, "%s", line); 641 } 642 (void) fflush(stdout); 643 (void) fclose(fd); 644 } 645 if (guest) { 646 reply(230, "Guest login ok, access restrictions apply."); 647 #ifdef HASSETPROCTITLE 648 snprintf(proctitle, sizeof(proctitle), 649 "%s: anonymous/%.*s", remotehost, 650 sizeof(proctitle) - sizeof(remotehost) - 651 sizeof(": anonymous/"), passwd); 652 setproctitle(proctitle); 653 #endif /* HASSETPROCTITLE */ 654 if (logging) 655 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s", 656 remotehost, passwd); 657 } else { 658 reply(230, "User %s logged in.", pw->pw_name); 659 #ifdef HASSETPROCTITLE 660 snprintf(proctitle, sizeof(proctitle), 661 "%s: %s", remotehost, pw->pw_name); 662 setproctitle(proctitle); 663 #endif /* HASSETPROCTITLE */ 664 if (logging) 665 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s", 666 remotehost, pw->pw_name); 667 } 668 (void) umask(defumask); 669 return; 670 bad: 671 /* Forget all about it... */ 672 end_login(); 673 } 674 675 void 676 retrieve(cmd, name) 677 char *cmd, *name; 678 { 679 FILE *fin, *dout; 680 struct stat st; 681 int (*closefunc) __P((FILE *)); 682 683 if (cmd == 0) { 684 fin = fopen(name, "r"), closefunc = fclose; 685 st.st_size = 0; 686 } else { 687 char line[BUFSIZ]; 688 689 (void) sprintf(line, cmd, name), name = line; 690 fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose; 691 st.st_size = -1; 692 st.st_blksize = BUFSIZ; 693 } 694 if (fin == NULL) { 695 if (errno != 0) { 696 perror_reply(550, name); 697 if (cmd == 0) { 698 LOGCMD("get", name); 699 } 700 } 701 return; 702 } 703 byte_count = -1; 704 if (cmd == 0 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 705 reply(550, "%s: not a plain file.", name); 706 goto done; 707 } 708 if (restart_point) { 709 if (type == TYPE_A) { 710 off_t i, n; 711 int c; 712 713 n = restart_point; 714 i = 0; 715 while (i++ < n) { 716 if ((c=getc(fin)) == EOF) { 717 perror_reply(550, name); 718 goto done; 719 } 720 if (c == '\n') 721 i++; 722 } 723 } else if (lseek(fileno(fin), restart_point, L_SET) < 0) { 724 perror_reply(550, name); 725 goto done; 726 } 727 } 728 dout = dataconn(name, st.st_size, "w"); 729 if (dout == NULL) 730 goto done; 731 send_data(fin, dout, st.st_blksize); 732 (void) fclose(dout); 733 data = -1; 734 pdata = -1; 735 done: 736 if (cmd == 0) 737 LOGBYTES("get", name, byte_count); 738 (*closefunc)(fin); 739 } 740 741 void 742 store(name, mode, unique) 743 char *name, *mode; 744 int unique; 745 { 746 FILE *fout, *din; 747 struct stat st; 748 int (*closefunc) __P((FILE *)); 749 750 if (unique && stat(name, &st) == 0 && 751 (name = gunique(name)) == NULL) { 752 LOGCMD(*mode == 'w' ? "put" : "append", name); 753 return; 754 } 755 756 if (restart_point) 757 mode = "r+"; 758 fout = fopen(name, mode); 759 closefunc = fclose; 760 if (fout == NULL) { 761 perror_reply(553, name); 762 LOGCMD(*mode == 'w' ? "put" : "append", name); 763 return; 764 } 765 byte_count = -1; 766 if (restart_point) { 767 if (type == TYPE_A) { 768 off_t i, n; 769 int c; 770 771 n = restart_point; 772 i = 0; 773 while (i++ < n) { 774 if ((c=getc(fout)) == EOF) { 775 perror_reply(550, name); 776 goto done; 777 } 778 if (c == '\n') 779 i++; 780 } 781 /* 782 * We must do this seek to "current" position 783 * because we are changing from reading to 784 * writing. 785 */ 786 if (fseek(fout, 0L, L_INCR) < 0) { 787 perror_reply(550, name); 788 goto done; 789 } 790 } else if (lseek(fileno(fout), restart_point, L_SET) < 0) { 791 perror_reply(550, name); 792 goto done; 793 } 794 } 795 din = dataconn(name, (off_t)-1, "r"); 796 if (din == NULL) 797 goto done; 798 if (receive_data(din, fout) == 0) { 799 if (unique) 800 reply(226, "Transfer complete (unique file name:%s).", 801 name); 802 else 803 reply(226, "Transfer complete."); 804 } 805 (void) fclose(din); 806 data = -1; 807 pdata = -1; 808 done: 809 LOGBYTES(*mode == 'w' ? "put" : "append", name, byte_count); 810 (*closefunc)(fout); 811 } 812 813 static FILE * 814 getdatasock(mode) 815 char *mode; 816 { 817 int on = 1, s, t, tries; 818 819 if (data >= 0) 820 return (fdopen(data, mode)); 821 (void) seteuid((uid_t)0); 822 s = socket(AF_INET, SOCK_STREAM, 0); 823 if (s < 0) 824 goto bad; 825 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 826 (char *) &on, sizeof(on)) < 0) 827 goto bad; 828 /* anchor socket to avoid multi-homing problems */ 829 data_source.sin_len = sizeof(struct sockaddr_in); 830 data_source.sin_family = AF_INET; 831 data_source.sin_addr = ctrl_addr.sin_addr; 832 for (tries = 1; ; tries++) { 833 if (bind(s, (struct sockaddr *)&data_source, 834 sizeof(data_source)) >= 0) 835 break; 836 if (errno != EADDRINUSE || tries > 10) 837 goto bad; 838 sleep(tries); 839 } 840 (void) seteuid((uid_t)pw->pw_uid); 841 #ifdef IP_TOS 842 on = IPTOS_THROUGHPUT; 843 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) 844 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 845 #endif 846 return (fdopen(s, mode)); 847 bad: 848 /* Return the real value of errno (close may change it) */ 849 t = errno; 850 (void) seteuid((uid_t)pw->pw_uid); 851 (void) close(s); 852 errno = t; 853 return (NULL); 854 } 855 856 static FILE * 857 dataconn(name, size, mode) 858 char *name; 859 off_t size; 860 char *mode; 861 { 862 char sizebuf[32]; 863 FILE *file; 864 int retry = 0, tos; 865 866 file_size = size; 867 byte_count = 0; 868 if (size != (off_t) -1) 869 (void) sprintf(sizebuf, " (%qd bytes)", size); 870 else 871 (void) strcpy(sizebuf, ""); 872 if (pdata >= 0) { 873 struct sockaddr_in from; 874 int s, fromlen = sizeof(from); 875 876 s = accept(pdata, (struct sockaddr *)&from, &fromlen); 877 if (s < 0) { 878 reply(425, "Can't open data connection."); 879 (void) close(pdata); 880 pdata = -1; 881 return (NULL); 882 } 883 (void) close(pdata); 884 pdata = s; 885 #ifdef IP_TOS 886 tos = IPTOS_THROUGHPUT; 887 (void) setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 888 sizeof(int)); 889 #endif 890 reply(150, "Opening %s mode data connection for '%s'%s.", 891 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 892 return (fdopen(pdata, mode)); 893 } 894 if (data >= 0) { 895 reply(125, "Using existing data connection for '%s'%s.", 896 name, sizebuf); 897 usedefault = 1; 898 return (fdopen(data, mode)); 899 } 900 if (usedefault) 901 data_dest = his_addr; 902 usedefault = 1; 903 file = getdatasock(mode); 904 if (file == NULL) { 905 reply(425, "Can't create data socket (%s,%d): %s.", 906 inet_ntoa(data_source.sin_addr), 907 ntohs(data_source.sin_port), strerror(errno)); 908 return (NULL); 909 } 910 data = fileno(file); 911 while (connect(data, (struct sockaddr *)&data_dest, 912 sizeof(data_dest)) < 0) { 913 if (errno == EADDRINUSE && retry < swaitmax) { 914 sleep((unsigned) swaitint); 915 retry += swaitint; 916 continue; 917 } 918 perror_reply(425, "Can't build data connection"); 919 (void) fclose(file); 920 data = -1; 921 return (NULL); 922 } 923 reply(150, "Opening %s mode data connection for '%s'%s.", 924 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 925 return (file); 926 } 927 928 /* 929 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 930 * encapsulation of the data subject * to Mode, Structure, and Type. 931 * 932 * NB: Form isn't handled. 933 */ 934 static void 935 send_data(instr, outstr, blksize) 936 FILE *instr, *outstr; 937 off_t blksize; 938 { 939 int c, cnt, filefd, netfd; 940 char *buf; 941 942 transflag++; 943 if (setjmp(urgcatch)) { 944 transflag = 0; 945 return; 946 } 947 switch (type) { 948 949 case TYPE_A: 950 while ((c = getc(instr)) != EOF) { 951 byte_count++; 952 if (c == '\n') { 953 if (ferror(outstr)) 954 goto data_err; 955 (void) putc('\r', outstr); 956 } 957 (void) putc(c, outstr); 958 } 959 fflush(outstr); 960 transflag = 0; 961 if (ferror(instr)) 962 goto file_err; 963 if (ferror(outstr)) 964 goto data_err; 965 reply(226, "Transfer complete."); 966 return; 967 968 case TYPE_I: 969 case TYPE_L: 970 if ((buf = malloc((u_int)blksize)) == NULL) { 971 transflag = 0; 972 perror_reply(451, "Local resource failure: malloc"); 973 return; 974 } 975 netfd = fileno(outstr); 976 filefd = fileno(instr); 977 while ((cnt = read(filefd, buf, (u_int)blksize)) > 0 && 978 write(netfd, buf, cnt) == cnt) 979 byte_count += cnt; 980 transflag = 0; 981 (void)free(buf); 982 if (cnt != 0) { 983 if (cnt < 0) 984 goto file_err; 985 goto data_err; 986 } 987 reply(226, "Transfer complete."); 988 return; 989 default: 990 transflag = 0; 991 reply(550, "Unimplemented TYPE %d in send_data", type); 992 return; 993 } 994 995 data_err: 996 transflag = 0; 997 perror_reply(426, "Data connection"); 998 return; 999 1000 file_err: 1001 transflag = 0; 1002 perror_reply(551, "Error on input file"); 1003 } 1004 1005 /* 1006 * Transfer data from peer to "outstr" using the appropriate encapulation of 1007 * the data subject to Mode, Structure, and Type. 1008 * 1009 * N.B.: Form isn't handled. 1010 */ 1011 static int 1012 receive_data(instr, outstr) 1013 FILE *instr, *outstr; 1014 { 1015 int c; 1016 int cnt, bare_lfs = 0; 1017 char buf[BUFSIZ]; 1018 1019 transflag++; 1020 if (setjmp(urgcatch)) { 1021 transflag = 0; 1022 return (-1); 1023 } 1024 switch (type) { 1025 1026 case TYPE_I: 1027 case TYPE_L: 1028 while ((cnt = read(fileno(instr), buf, sizeof(buf))) > 0) { 1029 if (write(fileno(outstr), buf, cnt) != cnt) 1030 goto file_err; 1031 byte_count += cnt; 1032 } 1033 if (cnt < 0) 1034 goto data_err; 1035 transflag = 0; 1036 return (0); 1037 1038 case TYPE_E: 1039 reply(553, "TYPE E not implemented."); 1040 transflag = 0; 1041 return (-1); 1042 1043 case TYPE_A: 1044 while ((c = getc(instr)) != EOF) { 1045 byte_count++; 1046 if (c == '\n') 1047 bare_lfs++; 1048 while (c == '\r') { 1049 if (ferror(outstr)) 1050 goto data_err; 1051 if ((c = getc(instr)) != '\n') { 1052 (void) putc ('\r', outstr); 1053 if (c == '\0' || c == EOF) 1054 goto contin2; 1055 } 1056 } 1057 (void) putc(c, outstr); 1058 contin2: ; 1059 } 1060 fflush(outstr); 1061 if (ferror(instr)) 1062 goto data_err; 1063 if (ferror(outstr)) 1064 goto file_err; 1065 transflag = 0; 1066 if (bare_lfs) { 1067 lreply(226, 1068 "WARNING! %d bare linefeeds received in ASCII mode", 1069 bare_lfs); 1070 (void)printf(" File may not have transferred correctly.\r\n"); 1071 } 1072 return (0); 1073 default: 1074 reply(550, "Unimplemented TYPE %d in receive_data", type); 1075 transflag = 0; 1076 return (-1); 1077 } 1078 1079 data_err: 1080 transflag = 0; 1081 perror_reply(426, "Data Connection"); 1082 return (-1); 1083 1084 file_err: 1085 transflag = 0; 1086 perror_reply(452, "Error writing file"); 1087 return (-1); 1088 } 1089 1090 void 1091 statfilecmd(filename) 1092 char *filename; 1093 { 1094 FILE *fin; 1095 int c; 1096 char line[LINE_MAX]; 1097 1098 (void)snprintf(line, sizeof(line), "/bin/ls -lgA %s", filename); 1099 fin = ftpd_popen(line, "r"); 1100 lreply(211, "status of %s:", filename); 1101 while ((c = getc(fin)) != EOF) { 1102 if (c == '\n') { 1103 if (ferror(stdout)){ 1104 perror_reply(421, "control connection"); 1105 (void) ftpd_pclose(fin); 1106 dologout(1); 1107 /* NOTREACHED */ 1108 } 1109 if (ferror(fin)) { 1110 perror_reply(551, filename); 1111 (void) ftpd_pclose(fin); 1112 return; 1113 } 1114 (void) putc('\r', stdout); 1115 } 1116 (void) putc(c, stdout); 1117 } 1118 (void) ftpd_pclose(fin); 1119 reply(211, "End of Status"); 1120 } 1121 1122 void 1123 statcmd() 1124 { 1125 struct sockaddr_in *sin; 1126 u_char *a, *p; 1127 1128 lreply(211, "%s FTP server status:", hostname, version); 1129 printf(" %s\r\n", version); 1130 printf(" Connected to %s", remotehost); 1131 if (!isdigit(remotehost[0])) 1132 printf(" (%s)", inet_ntoa(his_addr.sin_addr)); 1133 printf("\r\n"); 1134 if (logged_in) { 1135 if (guest) 1136 printf(" Logged in anonymously\r\n"); 1137 else 1138 printf(" Logged in as %s\r\n", pw->pw_name); 1139 } else if (askpasswd) 1140 printf(" Waiting for password\r\n"); 1141 else 1142 printf(" Waiting for user name\r\n"); 1143 printf(" TYPE: %s", typenames[type]); 1144 if (type == TYPE_A || type == TYPE_E) 1145 printf(", FORM: %s", formnames[form]); 1146 if (type == TYPE_L) 1147 #if NBBY == 8 1148 printf(" %d", NBBY); 1149 #else 1150 printf(" %d", bytesize); /* need definition! */ 1151 #endif 1152 printf("; STRUcture: %s; transfer MODE: %s\r\n", 1153 strunames[stru], modenames[mode]); 1154 if (data != -1) 1155 printf(" Data connection open\r\n"); 1156 else if (pdata != -1) { 1157 printf(" in Passive mode"); 1158 sin = &pasv_addr; 1159 goto printaddr; 1160 } else if (usedefault == 0) { 1161 printf(" PORT"); 1162 sin = &data_dest; 1163 printaddr: 1164 a = (u_char *) &sin->sin_addr; 1165 p = (u_char *) &sin->sin_port; 1166 #define UC(b) (((int) b) & 0xff) 1167 printf(" (%d,%d,%d,%d,%d,%d)\r\n", UC(a[0]), 1168 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 1169 #undef UC 1170 } else 1171 printf(" No data connection\r\n"); 1172 reply(211, "End of status"); 1173 } 1174 1175 void 1176 fatal(s) 1177 char *s; 1178 { 1179 1180 reply(451, "Error in server: %s\n", s); 1181 reply(221, "Closing connection due to server error."); 1182 dologout(0); 1183 /* NOTREACHED */ 1184 } 1185 1186 void 1187 #if __STDC__ 1188 reply(int n, const char *fmt, ...) 1189 #else 1190 reply(n, fmt, va_alist) 1191 int n; 1192 char *fmt; 1193 va_dcl 1194 #endif 1195 { 1196 va_list ap; 1197 #if __STDC__ 1198 va_start(ap, fmt); 1199 #else 1200 va_start(ap); 1201 #endif 1202 (void)printf("%d ", n); 1203 (void)vprintf(fmt, ap); 1204 (void)printf("\r\n"); 1205 (void)fflush(stdout); 1206 if (debug) { 1207 syslog(LOG_DEBUG, "<--- %d ", n); 1208 vsyslog(LOG_DEBUG, fmt, ap); 1209 } 1210 } 1211 1212 void 1213 #if __STDC__ 1214 lreply(int n, const char *fmt, ...) 1215 #else 1216 lreply(n, fmt, va_alist) 1217 int n; 1218 char *fmt; 1219 va_dcl 1220 #endif 1221 { 1222 va_list ap; 1223 #if __STDC__ 1224 va_start(ap, fmt); 1225 #else 1226 va_start(ap); 1227 #endif 1228 (void)printf("%d- ", n); 1229 (void)vprintf(fmt, ap); 1230 (void)printf("\r\n"); 1231 (void)fflush(stdout); 1232 if (debug) { 1233 syslog(LOG_DEBUG, "<--- %d- ", n); 1234 vsyslog(LOG_DEBUG, fmt, ap); 1235 } 1236 } 1237 1238 static void 1239 ack(s) 1240 char *s; 1241 { 1242 1243 reply(250, "%s command successful.", s); 1244 } 1245 1246 void 1247 nack(s) 1248 char *s; 1249 { 1250 1251 reply(502, "%s command not implemented.", s); 1252 } 1253 1254 /* ARGSUSED */ 1255 void 1256 yyerror(s) 1257 char *s; 1258 { 1259 char *cp; 1260 1261 if (cp = strchr(cbuf,'\n')) 1262 *cp = '\0'; 1263 reply(500, "'%s': command not understood.", cbuf); 1264 } 1265 1266 void 1267 delete(name) 1268 char *name; 1269 { 1270 struct stat st; 1271 1272 LOGCMD("delete", name); 1273 if (stat(name, &st) < 0) { 1274 perror_reply(550, name); 1275 return; 1276 } 1277 if ((st.st_mode&S_IFMT) == S_IFDIR) { 1278 if (rmdir(name) < 0) { 1279 perror_reply(550, name); 1280 return; 1281 } 1282 goto done; 1283 } 1284 if (unlink(name) < 0) { 1285 perror_reply(550, name); 1286 return; 1287 } 1288 done: 1289 ack("DELE"); 1290 } 1291 1292 void 1293 cwd(path) 1294 char *path; 1295 { 1296 1297 if (chdir(path) < 0) 1298 perror_reply(550, path); 1299 else 1300 ack("CWD"); 1301 } 1302 1303 void 1304 makedir(name) 1305 char *name; 1306 { 1307 1308 LOGCMD("mkdir", name); 1309 if (mkdir(name, 0777) < 0) 1310 perror_reply(550, name); 1311 else 1312 reply(257, "MKD command successful."); 1313 } 1314 1315 void 1316 removedir(name) 1317 char *name; 1318 { 1319 1320 LOGCMD("rmdir", name); 1321 if (rmdir(name) < 0) 1322 perror_reply(550, name); 1323 else 1324 ack("RMD"); 1325 } 1326 1327 void 1328 pwd() 1329 { 1330 char path[MAXPATHLEN + 1]; 1331 1332 if (getwd(path) == (char *)NULL) 1333 reply(550, "%s.", path); 1334 else 1335 reply(257, "\"%s\" is current directory.", path); 1336 } 1337 1338 char * 1339 renamefrom(name) 1340 char *name; 1341 { 1342 struct stat st; 1343 1344 if (stat(name, &st) < 0) { 1345 perror_reply(550, name); 1346 return ((char *)0); 1347 } 1348 reply(350, "File exists, ready for destination name"); 1349 return (name); 1350 } 1351 1352 void 1353 renamecmd(from, to) 1354 char *from, *to; 1355 { 1356 1357 LOGCMD2("rename", from, to); 1358 if (rename(from, to) < 0) 1359 perror_reply(550, "rename"); 1360 else 1361 ack("RNTO"); 1362 } 1363 1364 static void 1365 dolog(sin) 1366 struct sockaddr_in *sin; 1367 { 1368 struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr, 1369 sizeof(struct in_addr), AF_INET); 1370 1371 if (hp) 1372 (void) strncpy(remotehost, hp->h_name, sizeof(remotehost)); 1373 else 1374 (void) strncpy(remotehost, inet_ntoa(sin->sin_addr), 1375 sizeof(remotehost)); 1376 #ifdef HASSETPROCTITLE 1377 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 1378 setproctitle(proctitle); 1379 #endif /* HASSETPROCTITLE */ 1380 1381 if (logging) 1382 syslog(LOG_INFO, "connection from %s", remotehost); 1383 } 1384 1385 /* 1386 * Record logout in wtmp file 1387 * and exit with supplied status. 1388 */ 1389 void 1390 dologout(status) 1391 int status; 1392 { 1393 /* 1394 * Prevent reception of SIGURG from resulting in a resumption 1395 * back to the main program loop. 1396 */ 1397 transflag = 0; 1398 1399 if (logged_in) { 1400 (void) seteuid((uid_t)0); 1401 logwtmp(ttyline, "", ""); 1402 #if defined(KERBEROS) 1403 if (!notickets && krbtkfile_env) 1404 unlink(krbtkfile_env); 1405 #endif 1406 } 1407 /* beware of flushing buffers after a SIGPIPE */ 1408 _exit(status); 1409 } 1410 1411 static void 1412 myoob(signo) 1413 int signo; 1414 { 1415 char *cp; 1416 1417 /* only process if transfer occurring */ 1418 if (!transflag) 1419 return; 1420 cp = tmpline; 1421 if (getline(cp, 7, stdin) == NULL) { 1422 reply(221, "You could at least say goodbye."); 1423 dologout(0); 1424 } 1425 upper(cp); 1426 if (strcmp(cp, "ABOR\r\n") == 0) { 1427 tmpline[0] = '\0'; 1428 reply(426, "Transfer aborted. Data connection closed."); 1429 reply(226, "Abort successful"); 1430 longjmp(urgcatch, 1); 1431 } 1432 if (strcmp(cp, "STAT\r\n") == 0) { 1433 if (file_size != (off_t) -1) 1434 reply(213, "Status: %qd of %qd bytes transferred", 1435 byte_count, file_size); 1436 else 1437 reply(213, "Status: %qd bytes transferred", byte_count); 1438 } 1439 } 1440 1441 /* 1442 * Note: a response of 425 is not mentioned as a possible response to 1443 * the PASV command in RFC959. However, it has been blessed as 1444 * a legitimate response by Jon Postel in a telephone conversation 1445 * with Rick Adams on 25 Jan 89. 1446 */ 1447 void 1448 passive() 1449 { 1450 int len; 1451 char *p, *a; 1452 1453 pdata = socket(AF_INET, SOCK_STREAM, 0); 1454 if (pdata < 0) { 1455 perror_reply(425, "Can't open passive connection"); 1456 return; 1457 } 1458 pasv_addr = ctrl_addr; 1459 pasv_addr.sin_port = 0; 1460 (void) seteuid((uid_t)0); 1461 if (bind(pdata, (struct sockaddr *)&pasv_addr, sizeof(pasv_addr)) < 0) { 1462 (void) seteuid((uid_t)pw->pw_uid); 1463 goto pasv_error; 1464 } 1465 (void) seteuid((uid_t)pw->pw_uid); 1466 len = sizeof(pasv_addr); 1467 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 1468 goto pasv_error; 1469 if (listen(pdata, 1) < 0) 1470 goto pasv_error; 1471 a = (char *) &pasv_addr.sin_addr; 1472 p = (char *) &pasv_addr.sin_port; 1473 1474 #define UC(b) (((int) b) & 0xff) 1475 1476 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 1477 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 1478 return; 1479 1480 pasv_error: 1481 (void) close(pdata); 1482 pdata = -1; 1483 perror_reply(425, "Can't open passive connection"); 1484 return; 1485 } 1486 1487 /* 1488 * Generate unique name for file with basename "local". 1489 * The file named "local" is already known to exist. 1490 * Generates failure reply on error. 1491 */ 1492 static char * 1493 gunique(local) 1494 char *local; 1495 { 1496 static char new[MAXPATHLEN]; 1497 struct stat st; 1498 int count; 1499 char *cp; 1500 1501 cp = strrchr(local, '/'); 1502 if (cp) 1503 *cp = '\0'; 1504 if (stat(cp ? local : ".", &st) < 0) { 1505 perror_reply(553, cp ? local : "."); 1506 return ((char *) 0); 1507 } 1508 if (cp) 1509 *cp = '/'; 1510 (void) strcpy(new, local); 1511 cp = new + strlen(new); 1512 *cp++ = '.'; 1513 for (count = 1; count < 100; count++) { 1514 (void)sprintf(cp, "%d", count); 1515 if (stat(new, &st) < 0) 1516 return (new); 1517 } 1518 reply(452, "Unique file name cannot be created."); 1519 return (NULL); 1520 } 1521 1522 /* 1523 * Format and send reply containing system error number. 1524 */ 1525 void 1526 perror_reply(code, string) 1527 int code; 1528 char *string; 1529 { 1530 1531 reply(code, "%s: %s.", string, strerror(errno)); 1532 } 1533 1534 static char *onefile[] = { 1535 "", 1536 0 1537 }; 1538 1539 void 1540 send_file_list(whichf) 1541 char *whichf; 1542 { 1543 struct stat st; 1544 DIR *dirp = NULL; 1545 struct dirent *dir; 1546 FILE *dout = NULL; 1547 char **dirlist, *dirname; 1548 int simple = 0; 1549 int freeglob = 0; 1550 glob_t gl; 1551 1552 if (strpbrk(whichf, "~{[*?") != NULL) { 1553 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE; 1554 1555 memset(&gl, 0, sizeof(gl)); 1556 freeglob = 1; 1557 if (glob(whichf, flags, 0, &gl)) { 1558 reply(550, "not found"); 1559 goto out; 1560 } else if (gl.gl_pathc == 0) { 1561 errno = ENOENT; 1562 perror_reply(550, whichf); 1563 goto out; 1564 } 1565 dirlist = gl.gl_pathv; 1566 } else { 1567 onefile[0] = whichf; 1568 dirlist = onefile; 1569 simple = 1; 1570 } 1571 1572 if (setjmp(urgcatch)) { 1573 transflag = 0; 1574 goto out; 1575 } 1576 while (dirname = *dirlist++) { 1577 if (stat(dirname, &st) < 0) { 1578 /* 1579 * If user typed "ls -l", etc, and the client 1580 * used NLST, do what the user meant. 1581 */ 1582 if (dirname[0] == '-' && *dirlist == NULL && 1583 transflag == 0) { 1584 retrieve("/bin/ls %s", dirname); 1585 goto out; 1586 } 1587 perror_reply(550, whichf); 1588 if (dout != NULL) { 1589 (void) fclose(dout); 1590 transflag = 0; 1591 data = -1; 1592 pdata = -1; 1593 } 1594 goto out; 1595 } 1596 1597 if (S_ISREG(st.st_mode)) { 1598 if (dout == NULL) { 1599 dout = dataconn("file list", (off_t)-1, "w"); 1600 if (dout == NULL) 1601 goto out; 1602 transflag++; 1603 } 1604 fprintf(dout, "%s%s\n", dirname, 1605 type == TYPE_A ? "\r" : ""); 1606 byte_count += strlen(dirname) + 1; 1607 continue; 1608 } else if (!S_ISDIR(st.st_mode)) 1609 continue; 1610 1611 if ((dirp = opendir(dirname)) == NULL) 1612 continue; 1613 1614 while ((dir = readdir(dirp)) != NULL) { 1615 char nbuf[MAXPATHLEN]; 1616 1617 if (dir->d_name[0] == '.' && dir->d_namlen == 1) 1618 continue; 1619 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' && 1620 dir->d_namlen == 2) 1621 continue; 1622 1623 sprintf(nbuf, "%s/%s", dirname, dir->d_name); 1624 1625 /* 1626 * We have to do a stat to insure it's 1627 * not a directory or special file. 1628 */ 1629 if (simple || (stat(nbuf, &st) == 0 && 1630 S_ISREG(st.st_mode))) { 1631 if (dout == NULL) { 1632 dout = dataconn("file list", (off_t)-1, 1633 "w"); 1634 if (dout == NULL) 1635 goto out; 1636 transflag++; 1637 } 1638 if (nbuf[0] == '.' && nbuf[1] == '/') 1639 fprintf(dout, "%s%s\n", &nbuf[2], 1640 type == TYPE_A ? "\r" : ""); 1641 else 1642 fprintf(dout, "%s%s\n", nbuf, 1643 type == TYPE_A ? "\r" : ""); 1644 byte_count += strlen(nbuf) + 1; 1645 } 1646 } 1647 (void) closedir(dirp); 1648 } 1649 1650 if (dout == NULL) 1651 reply(550, "No files found."); 1652 else if (ferror(dout) != 0) 1653 perror_reply(550, "Data connection"); 1654 else 1655 reply(226, "Transfer complete."); 1656 1657 transflag = 0; 1658 if (dout != NULL) 1659 (void) fclose(dout); 1660 data = -1; 1661 pdata = -1; 1662 out: 1663 if (freeglob) { 1664 freeglob = 0; 1665 globfree(&gl); 1666 } 1667 } 1668
Indexes created Mon Sep 22 10:09:38 GMT 2025