ftpd.c revision 1.11
1 /* 2 * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 static char rcsid[] = "$Id: ftpd.c,v 1.11 1995/03/08 19:50:54 brezak Exp $"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 static char sccsid[] = "@(#)ftpd.c 8.4 (Berkeley) 4/16/94"; 43 #endif /* not lint */ 44 45 /* 46 * FTP server. 47 */ 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/ioctl.h> 51 #include <sys/socket.h> 52 #include <sys/wait.h> 53 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/ip.h> 57 58 #define FTP_NAMES 59 #include <arpa/ftp.h> 60 #include <arpa/inet.h> 61 #include <arpa/telnet.h> 62 63 #include <ctype.h> 64 #include <dirent.h> 65 #include <err.h> 66 #include <errno.h> 67 #include <fcntl.h> 68 #include <glob.h> 69 #include <limits.h> 70 #include <netdb.h> 71 #include <pwd.h> 72 #include <setjmp.h> 73 #include <signal.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <syslog.h> 78 #include <time.h> 79 #include <unistd.h> 80 81 #include "pathnames.h" 82 #include "extern.h" 83 84 #if __STDC__ 85 #include <stdarg.h> 86 #else 87 #include <varargs.h> 88 #endif 89 90 static char version[] = "Version 6.01"; 91 92 extern off_t restart_point; 93 extern char cbuf[]; 94 95 struct sockaddr_in ctrl_addr; 96 struct sockaddr_in data_source; 97 struct sockaddr_in data_dest; 98 struct sockaddr_in his_addr; 99 struct sockaddr_in pasv_addr; 100 101 int data; 102 jmp_buf errcatch, urgcatch; 103 int logged_in; 104 struct passwd *pw; 105 int debug; 106 int timeout = 900; /* timeout after 15 minutes of inactivity */ 107 int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */ 108 int logging; 109 int guest; 110 int dochroot; 111 int type; 112 int form; 113 int stru; /* avoid C keyword */ 114 int mode; 115 int usedefault = 1; /* for data transfers */ 116 int pdata = -1; /* for passive mode */ 117 sig_atomic_t transflag; 118 off_t file_size; 119 off_t byte_count; 120 #if !defined(CMASK) || CMASK == 0 121 #undef CMASK 122 #define CMASK 027 123 #endif 124 int defumask = CMASK; /* default umask value */ 125 char tmpline[7]; 126 char hostname[MAXHOSTNAMELEN]; 127 char remotehost[MAXHOSTNAMELEN]; 128 static char ttyline[20]; 129 char *tty = ttyline; /* for klogin */ 130 131 #if defined(KERBEROS) 132 int notickets = 1; 133 char *krbtkfile_env = NULL; 134 #endif 135 136 /* 137 * Timeout intervals for retrying connections 138 * to hosts that don't accept PORT cmds. This 139 * is a kludge, but given the problems with TCP... 140 */ 141 #define SWAITMAX 90 /* wait at most 90 seconds */ 142 #define SWAITINT 5 /* interval between retries */ 143 144 int swaitmax = SWAITMAX; 145 int swaitint = SWAITINT; 146 147 #ifdef HASSETPROCTITLE 148 char proctitle[BUFSIZ]; /* initial part of title */ 149 #endif /* HASSETPROCTITLE */ 150 151 #define LOGCMD(cmd, file) \ 152 if (logging > 1) \ 153 syslog(LOG_INFO,"%s %s%s", cmd, \ 154 *(file) == '/' ? "" : curdir(), file); 155 #define LOGCMD2(cmd, file1, file2) \ 156 if (logging > 1) \ 157 syslog(LOG_INFO,"%s %s%s %s%s", cmd, \ 158 *(file1) == '/' ? "" : curdir(), file1, \ 159 *(file2) == '/' ? "" : curdir(), file2); 160 #define LOGBYTES(cmd, file, cnt) \ 161 if (logging > 1) { \ 162 if (cnt == (off_t)-1) \ 163 syslog(LOG_INFO,"%s %s%s", cmd, \ 164 *(file) == '/' ? "" : curdir(), file); \ 165 else \ 166 syslog(LOG_INFO, "%s %s%s = %qd bytes", \ 167 cmd, (*(file) == '/') ? "" : curdir(), file, cnt); \ 168 } 169 170 static void ack __P((char *)); 171 static void myoob __P((int)); 172 static int checkuser __P((char *, char *)); 173 static FILE *dataconn __P((char *, off_t, char *)); 174 static void dolog __P((struct sockaddr_in *)); 175 static char *curdir __P((void)); 176 static void end_login __P((void)); 177 static FILE *getdatasock __P((char *)); 178 static char *gunique __P((char *)); 179 static void lostconn __P((int)); 180 static int receive_data __P((FILE *, FILE *)); 181 static void send_data __P((FILE *, FILE *, off_t)); 182 static struct passwd * 183 sgetpwnam __P((char *)); 184 static char *sgetsave __P((char *)); 185 186 static char * 187 curdir() 188 { 189 static char path[MAXPATHLEN+1+1]; /* path + '/' + '\0' */ 190 191 if (getcwd(path, sizeof(path)-2) == NULL) 192 return (""); 193 if (path[1] != '\0') /* special case for root dir. */ 194 strcat(path, "/"); 195 /* For guest account, skip / since it's chrooted */ 196 return (guest ? path+1 : path); 197 } 198 199 int 200 main(argc, argv, envp) 201 int argc; 202 char *argv[]; 203 char **envp; 204 { 205 int addrlen, ch, on = 1, tos; 206 char *cp, line[LINE_MAX]; 207 FILE *fd; 208 209 /* 210 * LOG_NDELAY sets up the logging connection immediately, 211 * necessary for anonymous ftp's that chroot and can't do it later. 212 */ 213 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 214 addrlen = sizeof(his_addr); 215 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) { 216 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]); 217 exit(1); 218 } 219 addrlen = sizeof(ctrl_addr); 220 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) { 221 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]); 222 exit(1); 223 } 224 #ifdef IP_TOS 225 tos = IPTOS_LOWDELAY; 226 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) 227 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 228 #endif 229 data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1); 230 debug = 0; 231 232 /* set this here so klogin can use it... */ 233 (void)sprintf(ttyline, "ftp%d", getpid()); 234 235 while ((ch = getopt(argc, argv, "dlt:T:u:v")) != EOF) { 236 switch (ch) { 237 case 'd': 238 debug = 1; 239 break; 240 241 case 'l': 242 logging++; /* > 1 == extra logging */ 243 break; 244 245 case 't': 246 timeout = atoi(optarg); 247 if (maxtimeout < timeout) 248 maxtimeout = timeout; 249 break; 250 251 case 'T': 252 maxtimeout = atoi(optarg); 253 if (timeout > maxtimeout) 254 timeout = maxtimeout; 255 break; 256 257 case 'u': 258 { 259 long val = 0; 260 261 val = strtol(optarg, &optarg, 8); 262 if (*optarg != '\0' || val < 0) 263 warnx("bad value for -u"); 264 else 265 defumask = val; 266 break; 267 } 268 269 case 'v': 270 debug = 1; 271 break; 272 273 default: 274 warnx("unknown flag -%c ignored", optopt); 275 break; 276 } 277 } 278 (void) freopen(_PATH_DEVNULL, "w", stderr); 279 (void) signal(SIGPIPE, lostconn); 280 (void) signal(SIGCHLD, SIG_IGN); 281 if ((long)signal(SIGURG, myoob) < 0) 282 syslog(LOG_ERR, "signal: %m"); 283 284 /* Try to handle urgent data inline */ 285 #ifdef SO_OOBINLINE 286 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0) 287 syslog(LOG_ERR, "setsockopt: %m"); 288 #endif 289 290 #ifdef F_SETOWN 291 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1) 292 syslog(LOG_ERR, "fcntl F_SETOWN: %m"); 293 #endif 294 dolog(&his_addr); 295 /* 296 * Set up default state 297 */ 298 data = -1; 299 type = TYPE_A; 300 form = FORM_N; 301 stru = STRU_F; 302 mode = MODE_S; 303 tmpline[0] = '\0'; 304 305 /* If logins are disabled, print out the message. */ 306 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) { 307 while (fgets(line, sizeof(line), fd) != NULL) { 308 if ((cp = strchr(line, '\n')) != NULL) 309 *cp = '\0'; 310 lreply(530, "%s", line); 311 } 312 (void) fflush(stdout); 313 (void) fclose(fd); 314 reply(530, "System not available."); 315 exit(0); 316 } 317 if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) { 318 while (fgets(line, sizeof(line), fd) != NULL) { 319 if ((cp = strchr(line, '\n')) != NULL) 320 *cp = '\0'; 321 lreply(220, "%s", line); 322 } 323 (void) fflush(stdout); 324 (void) fclose(fd); 325 /* reply(220,) must follow */ 326 } 327 (void) gethostname(hostname, sizeof(hostname)); 328 reply(220, "%s FTP server (%s) ready.", hostname, version); 329 (void) setjmp(errcatch); 330 for (;;) 331 (void) yyparse(); 332 /* NOTREACHED */ 333 } 334 335 static void 336 lostconn(signo) 337 int signo; 338 { 339 340 if (debug) 341 syslog(LOG_DEBUG, "lost connection"); 342 dologout(-1); 343 } 344 345 /* 346 * Helper function for sgetpwnam(). 347 */ 348 static char * 349 sgetsave(s) 350 char *s; 351 { 352 char *new = malloc((unsigned) strlen(s) + 1); 353 354 if (new == NULL) { 355 perror_reply(421, "Local resource failure: malloc"); 356 dologout(1); 357 /* NOTREACHED */ 358 } 359 (void) strcpy(new, s); 360 return (new); 361 } 362 363 /* 364 * Save the result of a getpwnam. Used for USER command, since 365 * the data returned must not be clobbered by any other command 366 * (e.g., globbing). 367 */ 368 static struct passwd * 369 sgetpwnam(name) 370 char *name; 371 { 372 static struct passwd save; 373 struct passwd *p; 374 375 if ((p = getpwnam(name)) == NULL) 376 return (p); 377 if (save.pw_name) { 378 free(save.pw_name); 379 free(save.pw_passwd); 380 free(save.pw_gecos); 381 free(save.pw_dir); 382 free(save.pw_shell); 383 } 384 save = *p; 385 save.pw_name = sgetsave(p->pw_name); 386 save.pw_passwd = sgetsave(p->pw_passwd); 387 save.pw_gecos = sgetsave(p->pw_gecos); 388 save.pw_dir = sgetsave(p->pw_dir); 389 save.pw_shell = sgetsave(p->pw_shell); 390 return (&save); 391 } 392 393 static int login_attempts; /* number of failed login attempts */ 394 static int askpasswd; /* had user command, ask for passwd */ 395 static char curname[10]; /* current USER name */ 396 397 /* 398 * USER command. 399 * Sets global passwd pointer pw if named account exists and is acceptable; 400 * sets askpasswd if a PASS command is expected. If logged in previously, 401 * need to reset state. If name is "ftp" or "anonymous", the name is not in 402 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return. 403 * If account doesn't exist, ask for passwd anyway. Otherwise, check user 404 * requesting login privileges. Disallow anyone who does not have a standard 405 * shell as returned by getusershell(). Disallow anyone mentioned in the file 406 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided. 407 */ 408 void 409 user(name) 410 char *name; 411 { 412 char *cp, *shell; 413 414 if (logged_in) { 415 if (guest) { 416 reply(530, "Can't change user from guest login."); 417 return; 418 } else if (dochroot) { 419 reply(530, "Can't change user from chroot user."); 420 return; 421 } 422 end_login(); 423 } 424 425 guest = 0; 426 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { 427 if (checkuser(_PATH_FTPUSERS, "ftp") || 428 checkuser(_PATH_FTPUSERS, "anonymous")) 429 reply(530, "User %s access denied.", name); 430 else if ((pw = sgetpwnam("ftp")) != NULL) { 431 guest = 1; 432 askpasswd = 1; 433 reply(331, 434 "Guest login ok, type your name as password."); 435 } else 436 reply(530, "User %s unknown.", name); 437 if (!askpasswd && logging) 438 syslog(LOG_NOTICE, 439 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost); 440 return; 441 } 442 if (pw = sgetpwnam(name)) { 443 if ((shell = pw->pw_shell) == NULL || *shell == 0) 444 shell = _PATH_BSHELL; 445 while ((cp = getusershell()) != NULL) 446 if (strcmp(cp, shell) == 0) 447 break; 448 endusershell(); 449 450 if (cp == NULL || checkuser(_PATH_FTPUSERS, name)) { 451 reply(530, "User %s access denied.", name); 452 if (logging) 453 syslog(LOG_NOTICE, 454 "FTP LOGIN REFUSED FROM %s, %s", 455 remotehost, name); 456 pw = (struct passwd *) NULL; 457 return; 458 } 459 } 460 if (logging) 461 strncpy(curname, name, sizeof(curname)-1); 462 #ifdef SKEY 463 if (!skey_haskey(name)) { 464 char *myskey, *skey_keyinfo __P((char *name)); 465 466 myskey = skey_keyinfo(name); 467 reply(331, "Password [%s] for %s required.", 468 myskey ? myskey : "error getting challenge", name); 469 } else 470 #endif 471 reply(331, "Password required for %s.", name); 472 473 askpasswd = 1; 474 /* 475 * Delay before reading passwd after first failed 476 * attempt to slow down passwd-guessing programs. 477 */ 478 if (login_attempts) 479 sleep((unsigned) login_attempts); 480 } 481 482 /* 483 * Check if a user is in the file "fname" 484 */ 485 static int 486 checkuser(fname, name) 487 char *fname; 488 char *name; 489 { 490 FILE *fd; 491 int found = 0; 492 char *p, line[BUFSIZ]; 493 494 if ((fd = fopen(fname, "r")) != NULL) { 495 while (fgets(line, sizeof(line), fd) != NULL) 496 if ((p = strchr(line, '\n')) != NULL) { 497 *p = '\0'; 498 if (line[0] == '#') 499 continue; 500 if (strcmp(line, name) == 0) { 501 found = 1; 502 break; 503 } 504 } 505 (void) fclose(fd); 506 } 507 return (found); 508 } 509 510 /* 511 * Terminate login as previous user, if any, resetting state; 512 * used when USER command is given or login fails. 513 */ 514 static void 515 end_login() 516 { 517 518 (void) seteuid((uid_t)0); 519 if (logged_in) 520 logwtmp(ttyline, "", ""); 521 pw = NULL; 522 logged_in = 0; 523 guest = 0; 524 dochroot = 0; 525 } 526 527 void 528 pass(passwd) 529 char *passwd; 530 { 531 int rval; 532 FILE *fd; 533 534 if (logged_in || askpasswd == 0) { 535 reply(503, "Login with USER first."); 536 return; 537 } 538 askpasswd = 0; 539 if (!guest) { /* "ftp" is only account allowed no password */ 540 if (pw == NULL) { 541 rval = 1; /* failure below */ 542 goto skip; 543 } 544 #if defined(KERBEROS) 545 rval = klogin(pw, "", hostname, passwd); 546 if (rval == 0) 547 goto skip; 548 #endif 549 #ifdef SKEY 550 if (skey_haskey(pw->pw_name) == 0 && 551 (skey_passcheck(pw->pw_name, passwd) != -1)) { 552 rval = 0; 553 goto skip; 554 } 555 #endif 556 /* the strcmp does not catch null passwords! */ 557 if (pw == NULL || *pw->pw_passwd == '\0' || 558 strcmp(crypt(passwd, (pw ? pw->pw_passwd : "xx")), pw->pw_passwd)) { 559 rval = 1; /* failure */ 560 goto skip; 561 } 562 rval = 0; 563 564 skip: 565 /* 566 * If rval == 1, the user failed the authentication check 567 * above. If rval == 0, either Kerberos or local authentication 568 * succeeded. 569 */ 570 if (rval) { 571 reply(530, "Login incorrect."); 572 if (logging) 573 syslog(LOG_NOTICE, 574 "FTP LOGIN FAILED FROM %s, %s", 575 remotehost, curname); 576 pw = NULL; 577 if (login_attempts++ >= 5) { 578 syslog(LOG_NOTICE, 579 "repeated login failures from %s", 580 remotehost); 581 exit(0); 582 } 583 return; 584 } 585 } 586 login_attempts = 0; /* this time successful */ 587 if (setegid((gid_t)pw->pw_gid) < 0) { 588 reply(550, "Can't set gid."); 589 return; 590 } 591 (void) initgroups(pw->pw_name, pw->pw_gid); 592 593 /* open wtmp before chroot */ 594 logwtmp(ttyline, pw->pw_name, remotehost); 595 logged_in = 1; 596 597 dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name); 598 if (guest) { 599 /* 600 * We MUST do a chdir() after the chroot. Otherwise 601 * the old current directory will be accessible as "." 602 * outside the new root! 603 */ 604 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 605 reply(550, "Can't set guest privileges."); 606 goto bad; 607 } 608 } else if (dochroot) { 609 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 610 reply(550, "Can't change root."); 611 goto bad; 612 } 613 } else if (chdir(pw->pw_dir) < 0) { 614 if (chdir("/") < 0) { 615 reply(530, "User %s: can't change directory to %s.", 616 pw->pw_name, pw->pw_dir); 617 goto bad; 618 } else 619 lreply(230, "No directory! Logging in with home=/"); 620 } 621 if (seteuid((uid_t)pw->pw_uid) < 0) { 622 reply(550, "Can't set uid."); 623 goto bad; 624 } 625 /* 626 * Display a login message, if it exists. 627 * N.B. reply(230,) must follow the message. 628 */ 629 if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) { 630 char *cp, line[LINE_MAX]; 631 632 while (fgets(line, sizeof(line), fd) != NULL) { 633 if ((cp = strchr(line, '\n')) != NULL) 634 *cp = '\0'; 635 lreply(230, "%s", line); 636 } 637 (void) fflush(stdout); 638 (void) fclose(fd); 639 } 640 if (guest) { 641 reply(230, "Guest login ok, access restrictions apply."); 642 #ifdef HASSETPROCTITLE 643 snprintf(proctitle, sizeof(proctitle), 644 "%s: anonymous/%.*s", remotehost, 645 sizeof(proctitle) - sizeof(remotehost) - 646 sizeof(": anonymous/"), passwd); 647 setproctitle(proctitle); 648 #endif /* HASSETPROCTITLE */ 649 if (logging) 650 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s", 651 remotehost, passwd); 652 } else { 653 reply(230, "User %s logged in.", pw->pw_name); 654 #ifdef HASSETPROCTITLE 655 snprintf(proctitle, sizeof(proctitle), 656 "%s: %s", remotehost, pw->pw_name); 657 setproctitle(proctitle); 658 #endif /* HASSETPROCTITLE */ 659 if (logging) 660 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s", 661 remotehost, pw->pw_name); 662 } 663 (void) umask(defumask); 664 return; 665 bad: 666 /* Forget all about it... */ 667 end_login(); 668 } 669 670 void 671 retrieve(cmd, name) 672 char *cmd, *name; 673 { 674 FILE *fin, *dout; 675 struct stat st; 676 int (*closefunc) __P((FILE *)); 677 678 if (cmd == 0) { 679 fin = fopen(name, "r"), closefunc = fclose; 680 st.st_size = 0; 681 } else { 682 char line[BUFSIZ]; 683 684 (void) sprintf(line, cmd, name), name = line; 685 fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose; 686 st.st_size = -1; 687 st.st_blksize = BUFSIZ; 688 } 689 if (fin == NULL) { 690 if (errno != 0) { 691 perror_reply(550, name); 692 if (cmd == 0) { 693 LOGCMD("get", name); 694 } 695 } 696 return; 697 } 698 byte_count = -1; 699 if (cmd == 0 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 700 reply(550, "%s: not a plain file.", name); 701 goto done; 702 } 703 if (restart_point) { 704 if (type == TYPE_A) { 705 off_t i, n; 706 int c; 707 708 n = restart_point; 709 i = 0; 710 while (i++ < n) { 711 if ((c=getc(fin)) == EOF) { 712 perror_reply(550, name); 713 goto done; 714 } 715 if (c == '\n') 716 i++; 717 } 718 } else if (lseek(fileno(fin), restart_point, L_SET) < 0) { 719 perror_reply(550, name); 720 goto done; 721 } 722 } 723 dout = dataconn(name, st.st_size, "w"); 724 if (dout == NULL) 725 goto done; 726 send_data(fin, dout, st.st_blksize); 727 (void) fclose(dout); 728 data = -1; 729 pdata = -1; 730 done: 731 if (cmd == 0) 732 LOGBYTES("get", name, byte_count); 733 (*closefunc)(fin); 734 } 735 736 void 737 store(name, mode, unique) 738 char *name, *mode; 739 int unique; 740 { 741 FILE *fout, *din; 742 struct stat st; 743 int (*closefunc) __P((FILE *)); 744 745 if (unique && stat(name, &st) == 0 && 746 (name = gunique(name)) == NULL) { 747 LOGCMD(*mode == 'w' ? "put" : "append", name); 748 return; 749 } 750 751 if (restart_point) 752 mode = "r+"; 753 fout = fopen(name, mode); 754 closefunc = fclose; 755 if (fout == NULL) { 756 perror_reply(553, name); 757 LOGCMD(*mode == 'w' ? "put" : "append", name); 758 return; 759 } 760 byte_count = -1; 761 if (restart_point) { 762 if (type == TYPE_A) { 763 off_t i, n; 764 int c; 765 766 n = restart_point; 767 i = 0; 768 while (i++ < n) { 769 if ((c=getc(fout)) == EOF) { 770 perror_reply(550, name); 771 goto done; 772 } 773 if (c == '\n') 774 i++; 775 } 776 /* 777 * We must do this seek to "current" position 778 * because we are changing from reading to 779 * writing. 780 */ 781 if (fseek(fout, 0L, L_INCR) < 0) { 782 perror_reply(550, name); 783 goto done; 784 } 785 } else if (lseek(fileno(fout), restart_point, L_SET) < 0) { 786 perror_reply(550, name); 787 goto done; 788 } 789 } 790 din = dataconn(name, (off_t)-1, "r"); 791 if (din == NULL) 792 goto done; 793 if (receive_data(din, fout) == 0) { 794 if (unique) 795 reply(226, "Transfer complete (unique file name:%s).", 796 name); 797 else 798 reply(226, "Transfer complete."); 799 } 800 (void) fclose(din); 801 data = -1; 802 pdata = -1; 803 done: 804 LOGBYTES(*mode == 'w' ? "put" : "append", name, byte_count); 805 (*closefunc)(fout); 806 } 807 808 static FILE * 809 getdatasock(mode) 810 char *mode; 811 { 812 int on = 1, s, t, tries; 813 814 if (data >= 0) 815 return (fdopen(data, mode)); 816 (void) seteuid((uid_t)0); 817 s = socket(AF_INET, SOCK_STREAM, 0); 818 if (s < 0) 819 goto bad; 820 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 821 (char *) &on, sizeof(on)) < 0) 822 goto bad; 823 /* anchor socket to avoid multi-homing problems */ 824 data_source.sin_family = AF_INET; 825 data_source.sin_addr = ctrl_addr.sin_addr; 826 for (tries = 1; ; tries++) { 827 if (bind(s, (struct sockaddr *)&data_source, 828 sizeof(data_source)) >= 0) 829 break; 830 if (errno != EADDRINUSE || tries > 10) 831 goto bad; 832 sleep(tries); 833 } 834 (void) seteuid((uid_t)pw->pw_uid); 835 #ifdef IP_TOS 836 on = IPTOS_THROUGHPUT; 837 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) 838 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 839 #endif 840 return (fdopen(s, mode)); 841 bad: 842 /* Return the real value of errno (close may change it) */ 843 t = errno; 844 (void) seteuid((uid_t)pw->pw_uid); 845 (void) close(s); 846 errno = t; 847 return (NULL); 848 } 849 850 static FILE * 851 dataconn(name, size, mode) 852 char *name; 853 off_t size; 854 char *mode; 855 { 856 char sizebuf[32]; 857 FILE *file; 858 int retry = 0, tos; 859 860 file_size = size; 861 byte_count = 0; 862 if (size != (off_t) -1) 863 (void) sprintf(sizebuf, " (%qd bytes)", size); 864 else 865 (void) strcpy(sizebuf, ""); 866 if (pdata >= 0) { 867 struct sockaddr_in from; 868 int s, fromlen = sizeof(from); 869 870 s = accept(pdata, (struct sockaddr *)&from, &fromlen); 871 if (s < 0) { 872 reply(425, "Can't open data connection."); 873 (void) close(pdata); 874 pdata = -1; 875 return (NULL); 876 } 877 (void) close(pdata); 878 pdata = s; 879 #ifdef IP_TOS 880 tos = IPTOS_LOWDELAY; 881 (void) setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 882 sizeof(int)); 883 #endif 884 reply(150, "Opening %s mode data connection for '%s'%s.", 885 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 886 return (fdopen(pdata, mode)); 887 } 888 if (data >= 0) { 889 reply(125, "Using existing data connection for '%s'%s.", 890 name, sizebuf); 891 usedefault = 1; 892 return (fdopen(data, mode)); 893 } 894 if (usedefault) 895 data_dest = his_addr; 896 usedefault = 1; 897 file = getdatasock(mode); 898 if (file == NULL) { 899 reply(425, "Can't create data socket (%s,%d): %s.", 900 inet_ntoa(data_source.sin_addr), 901 ntohs(data_source.sin_port), strerror(errno)); 902 return (NULL); 903 } 904 data = fileno(file); 905 while (connect(data, (struct sockaddr *)&data_dest, 906 sizeof(data_dest)) < 0) { 907 if (errno == EADDRINUSE && retry < swaitmax) { 908 sleep((unsigned) swaitint); 909 retry += swaitint; 910 continue; 911 } 912 perror_reply(425, "Can't build data connection"); 913 (void) fclose(file); 914 data = -1; 915 return (NULL); 916 } 917 reply(150, "Opening %s mode data connection for '%s'%s.", 918 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 919 return (file); 920 } 921 922 /* 923 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 924 * encapsulation of the data subject * to Mode, Structure, and Type. 925 * 926 * NB: Form isn't handled. 927 */ 928 static void 929 send_data(instr, outstr, blksize) 930 FILE *instr, *outstr; 931 off_t blksize; 932 { 933 int c, cnt, filefd, netfd; 934 char *buf; 935 936 transflag++; 937 if (setjmp(urgcatch)) { 938 transflag = 0; 939 return; 940 } 941 switch (type) { 942 943 case TYPE_A: 944 while ((c = getc(instr)) != EOF) { 945 byte_count++; 946 if (c == '\n') { 947 if (ferror(outstr)) 948 goto data_err; 949 (void) putc('\r', outstr); 950 } 951 (void) putc(c, outstr); 952 } 953 fflush(outstr); 954 transflag = 0; 955 if (ferror(instr)) 956 goto file_err; 957 if (ferror(outstr)) 958 goto data_err; 959 reply(226, "Transfer complete."); 960 return; 961 962 case TYPE_I: 963 case TYPE_L: 964 if ((buf = malloc((u_int)blksize)) == NULL) { 965 transflag = 0; 966 perror_reply(451, "Local resource failure: malloc"); 967 return; 968 } 969 netfd = fileno(outstr); 970 filefd = fileno(instr); 971 while ((cnt = read(filefd, buf, (u_int)blksize)) > 0 && 972 write(netfd, buf, cnt) == cnt) 973 byte_count += cnt; 974 transflag = 0; 975 (void)free(buf); 976 if (cnt != 0) { 977 if (cnt < 0) 978 goto file_err; 979 goto data_err; 980 } 981 reply(226, "Transfer complete."); 982 return; 983 default: 984 transflag = 0; 985 reply(550, "Unimplemented TYPE %d in send_data", type); 986 return; 987 } 988 989 data_err: 990 transflag = 0; 991 perror_reply(426, "Data connection"); 992 return; 993 994 file_err: 995 transflag = 0; 996 perror_reply(551, "Error on input file"); 997 } 998 999 /* 1000 * Transfer data from peer to "outstr" using the appropriate encapulation of 1001 * the data subject to Mode, Structure, and Type. 1002 * 1003 * N.B.: Form isn't handled. 1004 */ 1005 static int 1006 receive_data(instr, outstr) 1007 FILE *instr, *outstr; 1008 { 1009 int c; 1010 int cnt, bare_lfs = 0; 1011 char buf[BUFSIZ]; 1012 1013 transflag++; 1014 if (setjmp(urgcatch)) { 1015 transflag = 0; 1016 return (-1); 1017 } 1018 switch (type) { 1019 1020 case TYPE_I: 1021 case TYPE_L: 1022 while ((cnt = read(fileno(instr), buf, sizeof(buf))) > 0) { 1023 if (write(fileno(outstr), buf, cnt) != cnt) 1024 goto file_err; 1025 byte_count += cnt; 1026 } 1027 if (cnt < 0) 1028 goto data_err; 1029 transflag = 0; 1030 return (0); 1031 1032 case TYPE_E: 1033 reply(553, "TYPE E not implemented."); 1034 transflag = 0; 1035 return (-1); 1036 1037 case TYPE_A: 1038 while ((c = getc(instr)) != EOF) { 1039 byte_count++; 1040 if (c == '\n') 1041 bare_lfs++; 1042 while (c == '\r') { 1043 if (ferror(outstr)) 1044 goto data_err; 1045 if ((c = getc(instr)) != '\n') { 1046 (void) putc ('\r', outstr); 1047 if (c == '\0' || c == EOF) 1048 goto contin2; 1049 } 1050 } 1051 (void) putc(c, outstr); 1052 contin2: ; 1053 } 1054 fflush(outstr); 1055 if (ferror(instr)) 1056 goto data_err; 1057 if (ferror(outstr)) 1058 goto file_err; 1059 transflag = 0; 1060 if (bare_lfs) { 1061 lreply(226, 1062 "WARNING! %d bare linefeeds received in ASCII mode", 1063 bare_lfs); 1064 (void)printf(" File may not have transferred correctly.\r\n"); 1065 } 1066 return (0); 1067 default: 1068 reply(550, "Unimplemented TYPE %d in receive_data", type); 1069 transflag = 0; 1070 return (-1); 1071 } 1072 1073 data_err: 1074 transflag = 0; 1075 perror_reply(426, "Data Connection"); 1076 return (-1); 1077 1078 file_err: 1079 transflag = 0; 1080 perror_reply(452, "Error writing file"); 1081 return (-1); 1082 } 1083 1084 void 1085 statfilecmd(filename) 1086 char *filename; 1087 { 1088 FILE *fin; 1089 int c; 1090 char line[LINE_MAX]; 1091 1092 (void)snprintf(line, sizeof(line), "/bin/ls -lgA %s", filename); 1093 fin = ftpd_popen(line, "r"); 1094 lreply(211, "status of %s:", filename); 1095 while ((c = getc(fin)) != EOF) { 1096 if (c == '\n') { 1097 if (ferror(stdout)){ 1098 perror_reply(421, "control connection"); 1099 (void) ftpd_pclose(fin); 1100 dologout(1); 1101 /* NOTREACHED */ 1102 } 1103 if (ferror(fin)) { 1104 perror_reply(551, filename); 1105 (void) ftpd_pclose(fin); 1106 return; 1107 } 1108 (void) putc('\r', stdout); 1109 } 1110 (void) putc(c, stdout); 1111 } 1112 (void) ftpd_pclose(fin); 1113 reply(211, "End of Status"); 1114 } 1115 1116 void 1117 statcmd() 1118 { 1119 struct sockaddr_in *sin; 1120 u_char *a, *p; 1121 1122 lreply(211, "%s FTP server status:", hostname, version); 1123 printf(" %s\r\n", version); 1124 printf(" Connected to %s", remotehost); 1125 if (!isdigit(remotehost[0])) 1126 printf(" (%s)", inet_ntoa(his_addr.sin_addr)); 1127 printf("\r\n"); 1128 if (logged_in) { 1129 if (guest) 1130 printf(" Logged in anonymously\r\n"); 1131 else 1132 printf(" Logged in as %s\r\n", pw->pw_name); 1133 } else if (askpasswd) 1134 printf(" Waiting for password\r\n"); 1135 else 1136 printf(" Waiting for user name\r\n"); 1137 printf(" TYPE: %s", typenames[type]); 1138 if (type == TYPE_A || type == TYPE_E) 1139 printf(", FORM: %s", formnames[form]); 1140 if (type == TYPE_L) 1141 #if NBBY == 8 1142 printf(" %d", NBBY); 1143 #else 1144 printf(" %d", bytesize); /* need definition! */ 1145 #endif 1146 printf("; STRUcture: %s; transfer MODE: %s\r\n", 1147 strunames[stru], modenames[mode]); 1148 if (data != -1) 1149 printf(" Data connection open\r\n"); 1150 else if (pdata != -1) { 1151 printf(" in Passive mode"); 1152 sin = &pasv_addr; 1153 goto printaddr; 1154 } else if (usedefault == 0) { 1155 printf(" PORT"); 1156 sin = &data_dest; 1157 printaddr: 1158 a = (u_char *) &sin->sin_addr; 1159 p = (u_char *) &sin->sin_port; 1160 #define UC(b) (((int) b) & 0xff) 1161 printf(" (%d,%d,%d,%d,%d,%d)\r\n", UC(a[0]), 1162 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 1163 #undef UC 1164 } else 1165 printf(" No data connection\r\n"); 1166 reply(211, "End of status"); 1167 } 1168 1169 void 1170 fatal(s) 1171 char *s; 1172 { 1173 1174 reply(451, "Error in server: %s\n", s); 1175 reply(221, "Closing connection due to server error."); 1176 dologout(0); 1177 /* NOTREACHED */ 1178 } 1179 1180 void 1181 #if __STDC__ 1182 reply(int n, const char *fmt, ...) 1183 #else 1184 reply(n, fmt, va_alist) 1185 int n; 1186 char *fmt; 1187 va_dcl 1188 #endif 1189 { 1190 va_list ap; 1191 #if __STDC__ 1192 va_start(ap, fmt); 1193 #else 1194 va_start(ap); 1195 #endif 1196 (void)printf("%d ", n); 1197 (void)vprintf(fmt, ap); 1198 (void)printf("\r\n"); 1199 (void)fflush(stdout); 1200 if (debug) { 1201 syslog(LOG_DEBUG, "<--- %d ", n); 1202 vsyslog(LOG_DEBUG, fmt, ap); 1203 } 1204 } 1205 1206 void 1207 #if __STDC__ 1208 lreply(int n, const char *fmt, ...) 1209 #else 1210 lreply(n, fmt, va_alist) 1211 int n; 1212 char *fmt; 1213 va_dcl 1214 #endif 1215 { 1216 va_list ap; 1217 #if __STDC__ 1218 va_start(ap, fmt); 1219 #else 1220 va_start(ap); 1221 #endif 1222 (void)printf("%d- ", n); 1223 (void)vprintf(fmt, ap); 1224 (void)printf("\r\n"); 1225 (void)fflush(stdout); 1226 if (debug) { 1227 syslog(LOG_DEBUG, "<--- %d- ", n); 1228 vsyslog(LOG_DEBUG, fmt, ap); 1229 } 1230 } 1231 1232 static void 1233 ack(s) 1234 char *s; 1235 { 1236 1237 reply(250, "%s command successful.", s); 1238 } 1239 1240 void 1241 nack(s) 1242 char *s; 1243 { 1244 1245 reply(502, "%s command not implemented.", s); 1246 } 1247 1248 /* ARGSUSED */ 1249 void 1250 yyerror(s) 1251 char *s; 1252 { 1253 char *cp; 1254 1255 if (cp = strchr(cbuf,'\n')) 1256 *cp = '\0'; 1257 reply(500, "'%s': command not understood.", cbuf); 1258 } 1259 1260 void 1261 delete(name) 1262 char *name; 1263 { 1264 struct stat st; 1265 1266 LOGCMD("delete", name); 1267 if (stat(name, &st) < 0) { 1268 perror_reply(550, name); 1269 return; 1270 } 1271 if ((st.st_mode&S_IFMT) == S_IFDIR) { 1272 if (rmdir(name) < 0) { 1273 perror_reply(550, name); 1274 return; 1275 } 1276 goto done; 1277 } 1278 if (unlink(name) < 0) { 1279 perror_reply(550, name); 1280 return; 1281 } 1282 done: 1283 ack("DELE"); 1284 } 1285 1286 void 1287 cwd(path) 1288 char *path; 1289 { 1290 1291 if (chdir(path) < 0) 1292 perror_reply(550, path); 1293 else 1294 ack("CWD"); 1295 } 1296 1297 void 1298 makedir(name) 1299 char *name; 1300 { 1301 1302 LOGCMD("mkdir", name); 1303 if (mkdir(name, 0777) < 0) 1304 perror_reply(550, name); 1305 else 1306 reply(257, "MKD command successful."); 1307 } 1308 1309 void 1310 removedir(name) 1311 char *name; 1312 { 1313 1314 LOGCMD("rmdir", name); 1315 if (rmdir(name) < 0) 1316 perror_reply(550, name); 1317 else 1318 ack("RMD"); 1319 } 1320 1321 void 1322 pwd() 1323 { 1324 char path[MAXPATHLEN + 1]; 1325 1326 if (getwd(path) == (char *)NULL) 1327 reply(550, "%s.", path); 1328 else 1329 reply(257, "\"%s\" is current directory.", path); 1330 } 1331 1332 char * 1333 renamefrom(name) 1334 char *name; 1335 { 1336 struct stat st; 1337 1338 if (stat(name, &st) < 0) { 1339 perror_reply(550, name); 1340 return ((char *)0); 1341 } 1342 reply(350, "File exists, ready for destination name"); 1343 return (name); 1344 } 1345 1346 void 1347 renamecmd(from, to) 1348 char *from, *to; 1349 { 1350 1351 LOGCMD2("rename", from, to); 1352 if (rename(from, to) < 0) 1353 perror_reply(550, "rename"); 1354 else 1355 ack("RNTO"); 1356 } 1357 1358 static void 1359 dolog(sin) 1360 struct sockaddr_in *sin; 1361 { 1362 struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr, 1363 sizeof(struct in_addr), AF_INET); 1364 1365 if (hp) 1366 (void) strncpy(remotehost, hp->h_name, sizeof(remotehost)); 1367 else 1368 (void) strncpy(remotehost, inet_ntoa(sin->sin_addr), 1369 sizeof(remotehost)); 1370 #ifdef HASSETPROCTITLE 1371 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 1372 setproctitle(proctitle); 1373 #endif /* HASSETPROCTITLE */ 1374 1375 if (logging) 1376 syslog(LOG_INFO, "connection from %s", remotehost); 1377 } 1378 1379 /* 1380 * Record logout in wtmp file 1381 * and exit with supplied status. 1382 */ 1383 void 1384 dologout(status) 1385 int status; 1386 { 1387 1388 if (logged_in) { 1389 (void) seteuid((uid_t)0); 1390 logwtmp(ttyline, "", ""); 1391 #if defined(KERBEROS) 1392 if (!notickets && krbtkfile_env) 1393 unlink(krbtkfile_env); 1394 #endif 1395 } 1396 /* beware of flushing buffers after a SIGPIPE */ 1397 _exit(status); 1398 } 1399 1400 static void 1401 myoob(signo) 1402 int signo; 1403 { 1404 char *cp; 1405 1406 /* only process if transfer occurring */ 1407 if (!transflag) 1408 return; 1409 cp = tmpline; 1410 if (getline(cp, 7, stdin) == NULL) { 1411 reply(221, "You could at least say goodbye."); 1412 dologout(0); 1413 } 1414 upper(cp); 1415 if (strcmp(cp, "ABOR\r\n") == 0) { 1416 tmpline[0] = '\0'; 1417 reply(426, "Transfer aborted. Data connection closed."); 1418 reply(226, "Abort successful"); 1419 longjmp(urgcatch, 1); 1420 } 1421 if (strcmp(cp, "STAT\r\n") == 0) { 1422 if (file_size != (off_t) -1) 1423 reply(213, "Status: %qd of %qd bytes transferred", 1424 byte_count, file_size); 1425 else 1426 reply(213, "Status: %qd bytes transferred", byte_count); 1427 } 1428 } 1429 1430 /* 1431 * Note: a response of 425 is not mentioned as a possible response to 1432 * the PASV command in RFC959. However, it has been blessed as 1433 * a legitimate response by Jon Postel in a telephone conversation 1434 * with Rick Adams on 25 Jan 89. 1435 */ 1436 void 1437 passive() 1438 { 1439 int len; 1440 char *p, *a; 1441 1442 pdata = socket(AF_INET, SOCK_STREAM, 0); 1443 if (pdata < 0) { 1444 perror_reply(425, "Can't open passive connection"); 1445 return; 1446 } 1447 pasv_addr = ctrl_addr; 1448 pasv_addr.sin_port = 0; 1449 (void) seteuid((uid_t)0); 1450 if (bind(pdata, (struct sockaddr *)&pasv_addr, sizeof(pasv_addr)) < 0) { 1451 (void) seteuid((uid_t)pw->pw_uid); 1452 goto pasv_error; 1453 } 1454 (void) seteuid((uid_t)pw->pw_uid); 1455 len = sizeof(pasv_addr); 1456 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 1457 goto pasv_error; 1458 if (listen(pdata, 1) < 0) 1459 goto pasv_error; 1460 a = (char *) &pasv_addr.sin_addr; 1461 p = (char *) &pasv_addr.sin_port; 1462 1463 #define UC(b) (((int) b) & 0xff) 1464 1465 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 1466 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 1467 return; 1468 1469 pasv_error: 1470 (void) close(pdata); 1471 pdata = -1; 1472 perror_reply(425, "Can't open passive connection"); 1473 return; 1474 } 1475 1476 /* 1477 * Generate unique name for file with basename "local". 1478 * The file named "local" is already known to exist. 1479 * Generates failure reply on error. 1480 */ 1481 static char * 1482 gunique(local) 1483 char *local; 1484 { 1485 static char new[MAXPATHLEN]; 1486 struct stat st; 1487 int count; 1488 char *cp; 1489 1490 cp = strrchr(local, '/'); 1491 if (cp) 1492 *cp = '\0'; 1493 if (stat(cp ? local : ".", &st) < 0) { 1494 perror_reply(553, cp ? local : "."); 1495 return ((char *) 0); 1496 } 1497 if (cp) 1498 *cp = '/'; 1499 (void) strcpy(new, local); 1500 cp = new + strlen(new); 1501 *cp++ = '.'; 1502 for (count = 1; count < 100; count++) { 1503 (void)sprintf(cp, "%d", count); 1504 if (stat(new, &st) < 0) 1505 return (new); 1506 } 1507 reply(452, "Unique file name cannot be created."); 1508 return (NULL); 1509 } 1510 1511 /* 1512 * Format and send reply containing system error number. 1513 */ 1514 void 1515 perror_reply(code, string) 1516 int code; 1517 char *string; 1518 { 1519 1520 reply(code, "%s: %s.", string, strerror(errno)); 1521 } 1522 1523 static char *onefile[] = { 1524 "", 1525 0 1526 }; 1527 1528 void 1529 send_file_list(whichf) 1530 char *whichf; 1531 { 1532 struct stat st; 1533 DIR *dirp = NULL; 1534 struct dirent *dir; 1535 FILE *dout = NULL; 1536 char **dirlist, *dirname; 1537 int simple = 0; 1538 int freeglob = 0; 1539 glob_t gl; 1540 1541 if (strpbrk(whichf, "~{[*?") != NULL) { 1542 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE; 1543 1544 memset(&gl, 0, sizeof(gl)); 1545 freeglob = 1; 1546 if (glob(whichf, flags, 0, &gl)) { 1547 reply(550, "not found"); 1548 goto out; 1549 } else if (gl.gl_pathc == 0) { 1550 errno = ENOENT; 1551 perror_reply(550, whichf); 1552 goto out; 1553 } 1554 dirlist = gl.gl_pathv; 1555 } else { 1556 onefile[0] = whichf; 1557 dirlist = onefile; 1558 simple = 1; 1559 } 1560 1561 if (setjmp(urgcatch)) { 1562 transflag = 0; 1563 goto out; 1564 } 1565 while (dirname = *dirlist++) { 1566 if (stat(dirname, &st) < 0) { 1567 /* 1568 * If user typed "ls -l", etc, and the client 1569 * used NLST, do what the user meant. 1570 */ 1571 if (dirname[0] == '-' && *dirlist == NULL && 1572 transflag == 0) { 1573 retrieve("/bin/ls %s", dirname); 1574 goto out; 1575 } 1576 perror_reply(550, whichf); 1577 if (dout != NULL) { 1578 (void) fclose(dout); 1579 transflag = 0; 1580 data = -1; 1581 pdata = -1; 1582 } 1583 goto out; 1584 } 1585 1586 if (S_ISREG(st.st_mode)) { 1587 if (dout == NULL) { 1588 dout = dataconn("file list", (off_t)-1, "w"); 1589 if (dout == NULL) 1590 goto out; 1591 transflag++; 1592 } 1593 fprintf(dout, "%s%s\n", dirname, 1594 type == TYPE_A ? "\r" : ""); 1595 byte_count += strlen(dirname) + 1; 1596 continue; 1597 } else if (!S_ISDIR(st.st_mode)) 1598 continue; 1599 1600 if ((dirp = opendir(dirname)) == NULL) 1601 continue; 1602 1603 while ((dir = readdir(dirp)) != NULL) { 1604 char nbuf[MAXPATHLEN]; 1605 1606 if (dir->d_name[0] == '.' && dir->d_namlen == 1) 1607 continue; 1608 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' && 1609 dir->d_namlen == 2) 1610 continue; 1611 1612 sprintf(nbuf, "%s/%s", dirname, dir->d_name); 1613 1614 /* 1615 * We have to do a stat to insure it's 1616 * not a directory or special file. 1617 */ 1618 if (simple || (stat(nbuf, &st) == 0 && 1619 S_ISREG(st.st_mode))) { 1620 if (dout == NULL) { 1621 dout = dataconn("file list", (off_t)-1, 1622 "w"); 1623 if (dout == NULL) 1624 goto out; 1625 transflag++; 1626 } 1627 if (nbuf[0] == '.' && nbuf[1] == '/') 1628 fprintf(dout, "%s%s\n", &nbuf[2], 1629 type == TYPE_A ? "\r" : ""); 1630 else 1631 fprintf(dout, "%s%s\n", nbuf, 1632 type == TYPE_A ? "\r" : ""); 1633 byte_count += strlen(nbuf) + 1; 1634 } 1635 } 1636 (void) closedir(dirp); 1637 } 1638 1639 if (dout == NULL) 1640 reply(550, "No files found."); 1641 else if (ferror(dout) != 0) 1642 perror_reply(550, "Data connection"); 1643 else 1644 reply(226, "Transfer complete."); 1645 1646 transflag = 0; 1647 if (dout != NULL) 1648 (void) fclose(dout); 1649 data = -1; 1650 pdata = -1; 1651 out: 1652 if (freeglob) { 1653 freeglob = 0; 1654 globfree(&gl); 1655 } 1656 } 1657
Indexes created Tue Sep 23 07:09:52 GMT 2025