ftpd.c revision 1.10
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 1.10 1994/12/23 14:29:31 cgd 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 6.00"; 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]; 128 129 #if defined(KERBEROS) 130 int notickets = 1; 131 char *krbtkfile_env = NULL; 132 #endif 133 134 /* 135 * Timeout intervals for retrying connections 136 * to hosts that don't accept PORT cmds. This 137 * is a kludge, but given the problems with TCP... 138 */ 139 #define SWAITMAX 90 /* wait at most 90 seconds */ 140 #define SWAITINT 5 /* interval between retries */ 141 142 int swaitmax = SWAITMAX; 143 int swaitint = SWAITINT; 144 145 #ifdef HASSETPROCTITLE 146 char proctitle[BUFSIZ]; /* initial part of title */ 147 #endif /* HASSETPROCTITLE */ 148 149 #define LOGCMD(cmd, file) \ 150 if (logging > 1) \ 151 syslog(LOG_INFO,"%s %s%s", cmd, \ 152 *(file) == '/' ? "" : curdir(), file); 153 #define LOGCMD2(cmd, file1, file2) \ 154 if (logging > 1) \ 155 syslog(LOG_INFO,"%s %s%s %s%s", cmd, \ 156 *(file1) == '/' ? "" : curdir(), file1, \ 157 *(file2) == '/' ? "" : curdir(), file2); 158 #define LOGBYTES(cmd, file, cnt) \ 159 if (logging > 1) { \ 160 if (cnt == (off_t)-1) \ 161 syslog(LOG_INFO,"%s %s%s", cmd, \ 162 *(file) == '/' ? "" : curdir(), file); \ 163 else \ 164 syslog(LOG_INFO, "%s %s%s = %qd bytes", \ 165 cmd, (*(file) == '/') ? "" : curdir(), file, cnt); \ 166 } 167 168 static void ack __P((char *)); 169 static void myoob __P((int)); 170 static int checkuser __P((char *, char *)); 171 static FILE *dataconn __P((char *, off_t, char *)); 172 static void dolog __P((struct sockaddr_in *)); 173 static char *curdir __P((void)); 174 static void end_login __P((void)); 175 static FILE *getdatasock __P((char *)); 176 static char *gunique __P((char *)); 177 static void lostconn __P((int)); 178 static int receive_data __P((FILE *, FILE *)); 179 static void send_data __P((FILE *, FILE *, off_t)); 180 static struct passwd * 181 sgetpwnam __P((char *)); 182 static char *sgetsave __P((char *)); 183 184 static char * 185 curdir() 186 { 187 static char path[MAXPATHLEN+1+1]; /* path + '/' + '\0' */ 188 189 if (getcwd(path, sizeof(path)-2) == NULL) 190 return (""); 191 if (path[1] != '\0') /* special case for root dir. */ 192 strcat(path, "/"); 193 /* For guest account, skip / since it's chrooted */ 194 return (guest ? path+1 : path); 195 } 196 197 int 198 main(argc, argv, envp) 199 int argc; 200 char *argv[]; 201 char **envp; 202 { 203 int addrlen, ch, on = 1, tos; 204 char *cp, line[LINE_MAX]; 205 FILE *fd; 206 207 /* 208 * LOG_NDELAY sets up the logging connection immediately, 209 * necessary for anonymous ftp's that chroot and can't do it later. 210 */ 211 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 212 addrlen = sizeof(his_addr); 213 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) { 214 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]); 215 exit(1); 216 } 217 addrlen = sizeof(ctrl_addr); 218 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) { 219 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]); 220 exit(1); 221 } 222 #ifdef IP_TOS 223 tos = IPTOS_LOWDELAY; 224 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) 225 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 226 #endif 227 data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1); 228 debug = 0; 229 230 while ((ch = getopt(argc, argv, "dlt:T:u:v")) != EOF) { 231 switch (ch) { 232 case 'd': 233 debug = 1; 234 break; 235 236 case 'l': 237 logging++; /* > 1 == extra logging */ 238 break; 239 240 case 't': 241 timeout = atoi(optarg); 242 if (maxtimeout < timeout) 243 maxtimeout = timeout; 244 break; 245 246 case 'T': 247 maxtimeout = atoi(optarg); 248 if (timeout > maxtimeout) 249 timeout = maxtimeout; 250 break; 251 252 case 'u': 253 { 254 long val = 0; 255 256 val = strtol(optarg, &optarg, 8); 257 if (*optarg != '\0' || val < 0) 258 warnx("bad value for -u"); 259 else 260 defumask = val; 261 break; 262 } 263 264 case 'v': 265 debug = 1; 266 break; 267 268 default: 269 warnx("unknown flag -%c ignored", optopt); 270 break; 271 } 272 } 273 (void) freopen(_PATH_DEVNULL, "w", stderr); 274 (void) signal(SIGPIPE, lostconn); 275 (void) signal(SIGCHLD, SIG_IGN); 276 if ((long)signal(SIGURG, myoob) < 0) 277 syslog(LOG_ERR, "signal: %m"); 278 279 /* Try to handle urgent data inline */ 280 #ifdef SO_OOBINLINE 281 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0) 282 syslog(LOG_ERR, "setsockopt: %m"); 283 #endif 284 285 #ifdef F_SETOWN 286 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1) 287 syslog(LOG_ERR, "fcntl F_SETOWN: %m"); 288 #endif 289 dolog(&his_addr); 290 /* 291 * Set up default state 292 */ 293 data = -1; 294 type = TYPE_A; 295 form = FORM_N; 296 stru = STRU_F; 297 mode = MODE_S; 298 tmpline[0] = '\0'; 299 300 /* If logins are disabled, print out the message. */ 301 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) { 302 while (fgets(line, sizeof(line), fd) != NULL) { 303 if ((cp = strchr(line, '\n')) != NULL) 304 *cp = '\0'; 305 lreply(530, "%s", line); 306 } 307 (void) fflush(stdout); 308 (void) fclose(fd); 309 reply(530, "System not available."); 310 exit(0); 311 } 312 if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) { 313 while (fgets(line, sizeof(line), fd) != NULL) { 314 if ((cp = strchr(line, '\n')) != NULL) 315 *cp = '\0'; 316 lreply(220, "%s", line); 317 } 318 (void) fflush(stdout); 319 (void) fclose(fd); 320 /* reply(220,) must follow */ 321 } 322 (void) gethostname(hostname, sizeof(hostname)); 323 reply(220, "%s FTP server (%s) ready.", hostname, version); 324 (void) setjmp(errcatch); 325 for (;;) 326 (void) yyparse(); 327 /* NOTREACHED */ 328 } 329 330 static void 331 lostconn(signo) 332 int signo; 333 { 334 335 if (debug) 336 syslog(LOG_DEBUG, "lost connection"); 337 dologout(-1); 338 } 339 340 static char ttyline[20]; 341 342 /* 343 * Helper function for sgetpwnam(). 344 */ 345 static char * 346 sgetsave(s) 347 char *s; 348 { 349 char *new = malloc((unsigned) strlen(s) + 1); 350 351 if (new == NULL) { 352 perror_reply(421, "Local resource failure: malloc"); 353 dologout(1); 354 /* NOTREACHED */ 355 } 356 (void) strcpy(new, s); 357 return (new); 358 } 359 360 /* 361 * Save the result of a getpwnam. Used for USER command, since 362 * the data returned must not be clobbered by any other command 363 * (e.g., globbing). 364 */ 365 static struct passwd * 366 sgetpwnam(name) 367 char *name; 368 { 369 static struct passwd save; 370 struct passwd *p; 371 372 if ((p = getpwnam(name)) == NULL) 373 return (p); 374 if (save.pw_name) { 375 free(save.pw_name); 376 free(save.pw_passwd); 377 free(save.pw_gecos); 378 free(save.pw_dir); 379 free(save.pw_shell); 380 } 381 save = *p; 382 save.pw_name = sgetsave(p->pw_name); 383 save.pw_passwd = sgetsave(p->pw_passwd); 384 save.pw_gecos = sgetsave(p->pw_gecos); 385 save.pw_dir = sgetsave(p->pw_dir); 386 save.pw_shell = sgetsave(p->pw_shell); 387 return (&save); 388 } 389 390 static int login_attempts; /* number of failed login attempts */ 391 static int askpasswd; /* had user command, ask for passwd */ 392 static char curname[10]; /* current USER name */ 393 394 /* 395 * USER command. 396 * Sets global passwd pointer pw if named account exists and is acceptable; 397 * sets askpasswd if a PASS command is expected. If logged in previously, 398 * need to reset state. If name is "ftp" or "anonymous", the name is not in 399 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return. 400 * If account doesn't exist, ask for passwd anyway. Otherwise, check user 401 * requesting login privileges. Disallow anyone who does not have a standard 402 * shell as returned by getusershell(). Disallow anyone mentioned in the file 403 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided. 404 */ 405 void 406 user(name) 407 char *name; 408 { 409 char *cp, *shell; 410 411 if (logged_in) { 412 if (guest) { 413 reply(530, "Can't change user from guest login."); 414 return; 415 } else if (dochroot) { 416 reply(530, "Can't change user from chroot user."); 417 return; 418 } 419 end_login(); 420 } 421 422 guest = 0; 423 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { 424 if (checkuser(_PATH_FTPUSERS, "ftp") || 425 checkuser(_PATH_FTPUSERS, "anonymous")) 426 reply(530, "User %s access denied.", name); 427 else if ((pw = sgetpwnam("ftp")) != NULL) { 428 guest = 1; 429 askpasswd = 1; 430 reply(331, 431 "Guest login ok, type your name as password."); 432 } else 433 reply(530, "User %s unknown.", name); 434 if (!askpasswd && logging) 435 syslog(LOG_NOTICE, 436 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost); 437 return; 438 } 439 if (pw = sgetpwnam(name)) { 440 if ((shell = pw->pw_shell) == NULL || *shell == 0) 441 shell = _PATH_BSHELL; 442 while ((cp = getusershell()) != NULL) 443 if (strcmp(cp, shell) == 0) 444 break; 445 endusershell(); 446 447 if (cp == NULL || checkuser(_PATH_FTPUSERS, name)) { 448 reply(530, "User %s access denied.", name); 449 if (logging) 450 syslog(LOG_NOTICE, 451 "FTP LOGIN REFUSED FROM %s, %s", 452 remotehost, name); 453 pw = (struct passwd *) NULL; 454 return; 455 } 456 } 457 if (logging) 458 strncpy(curname, name, sizeof(curname)-1); 459 #ifdef SKEY 460 if (!skey_haskey(name)) { 461 char *myskey, *skey_keyinfo __P((char *name)); 462 463 myskey = skey_keyinfo(name); 464 reply(331, "Password [%s] for %s required.", 465 myskey ? myskey : "error getting challenge", name); 466 } else 467 #endif 468 reply(331, "Password required for %s.", name); 469 470 askpasswd = 1; 471 /* 472 * Delay before reading passwd after first failed 473 * attempt to slow down passwd-guessing programs. 474 */ 475 if (login_attempts) 476 sleep((unsigned) login_attempts); 477 } 478 479 /* 480 * Check if a user is in the file "fname" 481 */ 482 static int 483 checkuser(fname, name) 484 char *fname; 485 char *name; 486 { 487 FILE *fd; 488 int found = 0; 489 char *p, line[BUFSIZ]; 490 491 if ((fd = fopen(fname, "r")) != NULL) { 492 while (fgets(line, sizeof(line), fd) != NULL) 493 if ((p = strchr(line, '\n')) != NULL) { 494 *p = '\0'; 495 if (line[0] == '#') 496 continue; 497 if (strcmp(line, name) == 0) { 498 found = 1; 499 break; 500 } 501 } 502 (void) fclose(fd); 503 } 504 return (found); 505 } 506 507 /* 508 * Terminate login as previous user, if any, resetting state; 509 * used when USER command is given or login fails. 510 */ 511 static void 512 end_login() 513 { 514 515 (void) seteuid((uid_t)0); 516 if (logged_in) 517 logwtmp(ttyline, "", ""); 518 pw = NULL; 519 logged_in = 0; 520 guest = 0; 521 dochroot = 0; 522 } 523 524 void 525 pass(passwd) 526 char *passwd; 527 { 528 int rval; 529 FILE *fd; 530 531 if (logged_in || askpasswd == 0) { 532 reply(503, "Login with USER first."); 533 return; 534 } 535 askpasswd = 0; 536 if (!guest) { /* "ftp" is only account allowed no password */ 537 if (pw == NULL) { 538 rval = 1; /* failure below */ 539 goto skip; 540 } 541 #if defined(KERBEROS) 542 rval = klogin(pw, "", hostname, passwd); 543 if (rval == 0) 544 goto skip; 545 #endif 546 #ifdef SKEY 547 if (skey_haskey(pw->pw_name) == 0 && 548 (skey_passcheck(pw->pw_name, passwd) != -1)) { 549 rval = 0; 550 goto skip; 551 } 552 #endif 553 /* the strcmp does not catch null passwords! */ 554 if (pw == NULL || *pw->pw_passwd == '\0' || 555 strcmp(crypt(passwd, (pw ? pw->pw_passwd : "xx")), pw->pw_passwd)) { 556 rval = 1; /* failure */ 557 goto skip; 558 } 559 rval = 0; 560 561 skip: 562 /* 563 * If rval == 1, the user failed the authentication check 564 * above. If rval == 0, either Kerberos or local authentication 565 * succeeded. 566 */ 567 if (rval) { 568 reply(530, "Login incorrect."); 569 if (logging) 570 syslog(LOG_NOTICE, 571 "FTP LOGIN FAILED FROM %s, %s", 572 remotehost, curname); 573 pw = NULL; 574 if (login_attempts++ >= 5) { 575 syslog(LOG_NOTICE, 576 "repeated login failures from %s", 577 remotehost); 578 exit(0); 579 } 580 return; 581 } 582 } 583 login_attempts = 0; /* this time successful */ 584 if (setegid((gid_t)pw->pw_gid) < 0) { 585 reply(550, "Can't set gid."); 586 return; 587 } 588 (void) initgroups(pw->pw_name, pw->pw_gid); 589 590 /* open wtmp before chroot */ 591 (void)sprintf(ttyline, "ftp%d", getpid()); 592 logwtmp(ttyline, pw->pw_name, remotehost); 593 logged_in = 1; 594 595 dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name); 596 if (guest) { 597 /* 598 * We MUST do a chdir() after the chroot. Otherwise 599 * the old current directory will be accessible as "." 600 * outside the new root! 601 */ 602 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 603 reply(550, "Can't set guest privileges."); 604 goto bad; 605 } 606 } else if (dochroot) { 607 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 608 reply(550, "Can't change root."); 609 goto bad; 610 } 611 } else if (chdir(pw->pw_dir) < 0) { 612 if (chdir("/") < 0) { 613 reply(530, "User %s: can't change directory to %s.", 614 pw->pw_name, pw->pw_dir); 615 goto bad; 616 } else 617 lreply(230, "No directory! Logging in with home=/"); 618 } 619 if (seteuid((uid_t)pw->pw_uid) < 0) { 620 reply(550, "Can't set uid."); 621 goto bad; 622 } 623 /* 624 * Display a login message, if it exists. 625 * N.B. reply(230,) must follow the message. 626 */ 627 if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) { 628 char *cp, line[LINE_MAX]; 629 630 while (fgets(line, sizeof(line), fd) != NULL) { 631 if ((cp = strchr(line, '\n')) != NULL) 632 *cp = '\0'; 633 lreply(230, "%s", line); 634 } 635 (void) fflush(stdout); 636 (void) fclose(fd); 637 } 638 if (guest) { 639 reply(230, "Guest login ok, access restrictions apply."); 640 #ifdef HASSETPROCTITLE 641 snprintf(proctitle, sizeof(proctitle), 642 "%s: anonymous/%.*s", remotehost, 643 sizeof(proctitle) - sizeof(remotehost) - 644 sizeof(": anonymous/"), passwd); 645 setproctitle(proctitle); 646 #endif /* HASSETPROCTITLE */ 647 if (logging) 648 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s", 649 remotehost, passwd); 650 } else { 651 reply(230, "User %s logged in.", pw->pw_name); 652 #ifdef HASSETPROCTITLE 653 snprintf(proctitle, sizeof(proctitle), 654 "%s: %s", remotehost, pw->pw_name); 655 setproctitle(proctitle); 656 #endif /* HASSETPROCTITLE */ 657 if (logging) 658 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s", 659 remotehost, pw->pw_name); 660 } 661 (void) umask(defumask); 662 return; 663 bad: 664 /* Forget all about it... */ 665 end_login(); 666 } 667 668 void 669 retrieve(cmd, name) 670 char *cmd, *name; 671 { 672 FILE *fin, *dout; 673 struct stat st; 674 int (*closefunc) __P((FILE *)); 675 676 if (cmd == 0) { 677 fin = fopen(name, "r"), closefunc = fclose; 678 st.st_size = 0; 679 } else { 680 char line[BUFSIZ]; 681 682 (void) sprintf(line, cmd, name), name = line; 683 fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose; 684 st.st_size = -1; 685 st.st_blksize = BUFSIZ; 686 } 687 if (fin == NULL) { 688 if (errno != 0) { 689 perror_reply(550, name); 690 if (cmd == 0) { 691 LOGCMD("get", name); 692 } 693 } 694 return; 695 } 696 byte_count = -1; 697 if (cmd == 0 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 698 reply(550, "%s: not a plain file.", name); 699 goto done; 700 } 701 if (restart_point) { 702 if (type == TYPE_A) { 703 off_t i, n; 704 int c; 705 706 n = restart_point; 707 i = 0; 708 while (i++ < n) { 709 if ((c=getc(fin)) == EOF) { 710 perror_reply(550, name); 711 goto done; 712 } 713 if (c == '\n') 714 i++; 715 } 716 } else if (lseek(fileno(fin), restart_point, L_SET) < 0) { 717 perror_reply(550, name); 718 goto done; 719 } 720 } 721 dout = dataconn(name, st.st_size, "w"); 722 if (dout == NULL) 723 goto done; 724 send_data(fin, dout, st.st_blksize); 725 (void) fclose(dout); 726 data = -1; 727 pdata = -1; 728 done: 729 if (cmd == 0) 730 LOGBYTES("get", name, byte_count); 731 (*closefunc)(fin); 732 } 733 734 void 735 store(name, mode, unique) 736 char *name, *mode; 737 int unique; 738 { 739 FILE *fout, *din; 740 struct stat st; 741 int (*closefunc) __P((FILE *)); 742 743 if (unique && stat(name, &st) == 0 && 744 (name = gunique(name)) == NULL) { 745 LOGCMD(*mode == 'w' ? "put" : "append", name); 746 return; 747 } 748 749 if (restart_point) 750 mode = "r+"; 751 fout = fopen(name, mode); 752 closefunc = fclose; 753 if (fout == NULL) { 754 perror_reply(553, name); 755 LOGCMD(*mode == 'w' ? "put" : "append", name); 756 return; 757 } 758 byte_count = -1; 759 if (restart_point) { 760 if (type == TYPE_A) { 761 off_t i, n; 762 int c; 763 764 n = restart_point; 765 i = 0; 766 while (i++ < n) { 767 if ((c=getc(fout)) == EOF) { 768 perror_reply(550, name); 769 goto done; 770 } 771 if (c == '\n') 772 i++; 773 } 774 /* 775 * We must do this seek to "current" position 776 * because we are changing from reading to 777 * writing. 778 */ 779 if (fseek(fout, 0L, L_INCR) < 0) { 780 perror_reply(550, name); 781 goto done; 782 } 783 } else if (lseek(fileno(fout), restart_point, L_SET) < 0) { 784 perror_reply(550, name); 785 goto done; 786 } 787 } 788 din = dataconn(name, (off_t)-1, "r"); 789 if (din == NULL) 790 goto done; 791 if (receive_data(din, fout) == 0) { 792 if (unique) 793 reply(226, "Transfer complete (unique file name:%s).", 794 name); 795 else 796 reply(226, "Transfer complete."); 797 } 798 (void) fclose(din); 799 data = -1; 800 pdata = -1; 801 done: 802 LOGBYTES(*mode == 'w' ? "put" : "append", name, byte_count); 803 (*closefunc)(fout); 804 } 805 806 static FILE * 807 getdatasock(mode) 808 char *mode; 809 { 810 int on = 1, s, t, tries; 811 812 if (data >= 0) 813 return (fdopen(data, mode)); 814 (void) seteuid((uid_t)0); 815 s = socket(AF_INET, SOCK_STREAM, 0); 816 if (s < 0) 817 goto bad; 818 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 819 (char *) &on, sizeof(on)) < 0) 820 goto bad; 821 /* anchor socket to avoid multi-homing problems */ 822 data_source.sin_family = AF_INET; 823 data_source.sin_addr = ctrl_addr.sin_addr; 824 for (tries = 1; ; tries++) { 825 if (bind(s, (struct sockaddr *)&data_source, 826 sizeof(data_source)) >= 0) 827 break; 828 if (errno != EADDRINUSE || tries > 10) 829 goto bad; 830 sleep(tries); 831 } 832 (void) seteuid((uid_t)pw->pw_uid); 833 #ifdef IP_TOS 834 on = IPTOS_THROUGHPUT; 835 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) 836 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 837 #endif 838 return (fdopen(s, mode)); 839 bad: 840 /* Return the real value of errno (close may change it) */ 841 t = errno; 842 (void) seteuid((uid_t)pw->pw_uid); 843 (void) close(s); 844 errno = t; 845 return (NULL); 846 } 847 848 static FILE * 849 dataconn(name, size, mode) 850 char *name; 851 off_t size; 852 char *mode; 853 { 854 char sizebuf[32]; 855 FILE *file; 856 int retry = 0, tos; 857 858 file_size = size; 859 byte_count = 0; 860 if (size != (off_t) -1) 861 (void) sprintf(sizebuf, " (%qd bytes)", size); 862 else 863 (void) strcpy(sizebuf, ""); 864 if (pdata >= 0) { 865 struct sockaddr_in from; 866 int s, fromlen = sizeof(from); 867 868 s = accept(pdata, (struct sockaddr *)&from, &fromlen); 869 if (s < 0) { 870 reply(425, "Can't open data connection."); 871 (void) close(pdata); 872 pdata = -1; 873 return (NULL); 874 } 875 (void) close(pdata); 876 pdata = s; 877 #ifdef IP_TOS 878 tos = IPTOS_LOWDELAY; 879 (void) setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 880 sizeof(int)); 881 #endif 882 reply(150, "Opening %s mode data connection for '%s'%s.", 883 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 884 return (fdopen(pdata, mode)); 885 } 886 if (data >= 0) { 887 reply(125, "Using existing data connection for '%s'%s.", 888 name, sizebuf); 889 usedefault = 1; 890 return (fdopen(data, mode)); 891 } 892 if (usedefault) 893 data_dest = his_addr; 894 usedefault = 1; 895 file = getdatasock(mode); 896 if (file == NULL) { 897 reply(425, "Can't create data socket (%s,%d): %s.", 898 inet_ntoa(data_source.sin_addr), 899 ntohs(data_source.sin_port), strerror(errno)); 900 return (NULL); 901 } 902 data = fileno(file); 903 while (connect(data, (struct sockaddr *)&data_dest, 904 sizeof(data_dest)) < 0) { 905 if (errno == EADDRINUSE && retry < swaitmax) { 906 sleep((unsigned) swaitint); 907 retry += swaitint; 908 continue; 909 } 910 perror_reply(425, "Can't build data connection"); 911 (void) fclose(file); 912 data = -1; 913 return (NULL); 914 } 915 reply(150, "Opening %s mode data connection for '%s'%s.", 916 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 917 return (file); 918 } 919 920 /* 921 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 922 * encapsulation of the data subject * to Mode, Structure, and Type. 923 * 924 * NB: Form isn't handled. 925 */ 926 static void 927 send_data(instr, outstr, blksize) 928 FILE *instr, *outstr; 929 off_t blksize; 930 { 931 int c, cnt, filefd, netfd; 932 char *buf; 933 934 transflag++; 935 if (setjmp(urgcatch)) { 936 transflag = 0; 937 return; 938 } 939 switch (type) { 940 941 case TYPE_A: 942 while ((c = getc(instr)) != EOF) { 943 byte_count++; 944 if (c == '\n') { 945 if (ferror(outstr)) 946 goto data_err; 947 (void) putc('\r', outstr); 948 } 949 (void) putc(c, outstr); 950 } 951 fflush(outstr); 952 transflag = 0; 953 if (ferror(instr)) 954 goto file_err; 955 if (ferror(outstr)) 956 goto data_err; 957 reply(226, "Transfer complete."); 958 return; 959 960 case TYPE_I: 961 case TYPE_L: 962 if ((buf = malloc((u_int)blksize)) == NULL) { 963 transflag = 0; 964 perror_reply(451, "Local resource failure: malloc"); 965 return; 966 } 967 netfd = fileno(outstr); 968 filefd = fileno(instr); 969 while ((cnt = read(filefd, buf, (u_int)blksize)) > 0 && 970 write(netfd, buf, cnt) == cnt) 971 byte_count += cnt; 972 transflag = 0; 973 (void)free(buf); 974 if (cnt != 0) { 975 if (cnt < 0) 976 goto file_err; 977 goto data_err; 978 } 979 reply(226, "Transfer complete."); 980 return; 981 default: 982 transflag = 0; 983 reply(550, "Unimplemented TYPE %d in send_data", type); 984 return; 985 } 986 987 data_err: 988 transflag = 0; 989 perror_reply(426, "Data connection"); 990 return; 991 992 file_err: 993 transflag = 0; 994 perror_reply(551, "Error on input file"); 995 } 996 997 /* 998 * Transfer data from peer to "outstr" using the appropriate encapulation of 999 * the data subject to Mode, Structure, and Type. 1000 * 1001 * N.B.: Form isn't handled. 1002 */ 1003 static int 1004 receive_data(instr, outstr) 1005 FILE *instr, *outstr; 1006 { 1007 int c; 1008 int cnt, bare_lfs = 0; 1009 char buf[BUFSIZ]; 1010 1011 transflag++; 1012 if (setjmp(urgcatch)) { 1013 transflag = 0; 1014 return (-1); 1015 } 1016 switch (type) { 1017 1018 case TYPE_I: 1019 case TYPE_L: 1020 while ((cnt = read(fileno(instr), buf, sizeof(buf))) > 0) { 1021 if (write(fileno(outstr), buf, cnt) != cnt) 1022 goto file_err; 1023 byte_count += cnt; 1024 } 1025 if (cnt < 0) 1026 goto data_err; 1027 transflag = 0; 1028 return (0); 1029 1030 case TYPE_E: 1031 reply(553, "TYPE E not implemented."); 1032 transflag = 0; 1033 return (-1); 1034 1035 case TYPE_A: 1036 while ((c = getc(instr)) != EOF) { 1037 byte_count++; 1038 if (c == '\n') 1039 bare_lfs++; 1040 while (c == '\r') { 1041 if (ferror(outstr)) 1042 goto data_err; 1043 if ((c = getc(instr)) != '\n') { 1044 (void) putc ('\r', outstr); 1045 if (c == '\0' || c == EOF) 1046 goto contin2; 1047 } 1048 } 1049 (void) putc(c, outstr); 1050 contin2: ; 1051 } 1052 fflush(outstr); 1053 if (ferror(instr)) 1054 goto data_err; 1055 if (ferror(outstr)) 1056 goto file_err; 1057 transflag = 0; 1058 if (bare_lfs) { 1059 lreply(226, 1060 "WARNING! %d bare linefeeds received in ASCII mode", 1061 bare_lfs); 1062 (void)printf(" File may not have transferred correctly.\r\n"); 1063 } 1064 return (0); 1065 default: 1066 reply(550, "Unimplemented TYPE %d in receive_data", type); 1067 transflag = 0; 1068 return (-1); 1069 } 1070 1071 data_err: 1072 transflag = 0; 1073 perror_reply(426, "Data Connection"); 1074 return (-1); 1075 1076 file_err: 1077 transflag = 0; 1078 perror_reply(452, "Error writing file"); 1079 return (-1); 1080 } 1081 1082 void 1083 statfilecmd(filename) 1084 char *filename; 1085 { 1086 FILE *fin; 1087 int c; 1088 char line[LINE_MAX]; 1089 1090 (void)snprintf(line, sizeof(line), "/bin/ls -lgA %s", filename); 1091 fin = ftpd_popen(line, "r"); 1092 lreply(211, "status of %s:", filename); 1093 while ((c = getc(fin)) != EOF) { 1094 if (c == '\n') { 1095 if (ferror(stdout)){ 1096 perror_reply(421, "control connection"); 1097 (void) ftpd_pclose(fin); 1098 dologout(1); 1099 /* NOTREACHED */ 1100 } 1101 if (ferror(fin)) { 1102 perror_reply(551, filename); 1103 (void) ftpd_pclose(fin); 1104 return; 1105 } 1106 (void) putc('\r', stdout); 1107 } 1108 (void) putc(c, stdout); 1109 } 1110 (void) ftpd_pclose(fin); 1111 reply(211, "End of Status"); 1112 } 1113 1114 void 1115 statcmd() 1116 { 1117 struct sockaddr_in *sin; 1118 u_char *a, *p; 1119 1120 lreply(211, "%s FTP server status:", hostname, version); 1121 printf(" %s\r\n", version); 1122 printf(" Connected to %s", remotehost); 1123 if (!isdigit(remotehost[0])) 1124 printf(" (%s)", inet_ntoa(his_addr.sin_addr)); 1125 printf("\r\n"); 1126 if (logged_in) { 1127 if (guest) 1128 printf(" Logged in anonymously\r\n"); 1129 else 1130 printf(" Logged in as %s\r\n", pw->pw_name); 1131 } else if (askpasswd) 1132 printf(" Waiting for password\r\n"); 1133 else 1134 printf(" Waiting for user name\r\n"); 1135 printf(" TYPE: %s", typenames[type]); 1136 if (type == TYPE_A || type == TYPE_E) 1137 printf(", FORM: %s", formnames[form]); 1138 if (type == TYPE_L) 1139 #if NBBY == 8 1140 printf(" %d", NBBY); 1141 #else 1142 printf(" %d", bytesize); /* need definition! */ 1143 #endif 1144 printf("; STRUcture: %s; transfer MODE: %s\r\n", 1145 strunames[stru], modenames[mode]); 1146 if (data != -1) 1147 printf(" Data connection open\r\n"); 1148 else if (pdata != -1) { 1149 printf(" in Passive mode"); 1150 sin = &pasv_addr; 1151 goto printaddr; 1152 } else if (usedefault == 0) { 1153 printf(" PORT"); 1154 sin = &data_dest; 1155 printaddr: 1156 a = (u_char *) &sin->sin_addr; 1157 p = (u_char *) &sin->sin_port; 1158 #define UC(b) (((int) b) & 0xff) 1159 printf(" (%d,%d,%d,%d,%d,%d)\r\n", UC(a[0]), 1160 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 1161 #undef UC 1162 } else 1163 printf(" No data connection\r\n"); 1164 reply(211, "End of status"); 1165 } 1166 1167 void 1168 fatal(s) 1169 char *s; 1170 { 1171 1172 reply(451, "Error in server: %s\n", s); 1173 reply(221, "Closing connection due to server error."); 1174 dologout(0); 1175 /* NOTREACHED */ 1176 } 1177 1178 void 1179 #if __STDC__ 1180 reply(int n, const char *fmt, ...) 1181 #else 1182 reply(n, fmt, va_alist) 1183 int n; 1184 char *fmt; 1185 va_dcl 1186 #endif 1187 { 1188 va_list ap; 1189 #if __STDC__ 1190 va_start(ap, fmt); 1191 #else 1192 va_start(ap); 1193 #endif 1194 (void)printf("%d ", n); 1195 (void)vprintf(fmt, ap); 1196 (void)printf("\r\n"); 1197 (void)fflush(stdout); 1198 if (debug) { 1199 syslog(LOG_DEBUG, "<--- %d ", n); 1200 vsyslog(LOG_DEBUG, fmt, ap); 1201 } 1202 } 1203 1204 void 1205 #if __STDC__ 1206 lreply(int n, const char *fmt, ...) 1207 #else 1208 lreply(n, fmt, va_alist) 1209 int n; 1210 char *fmt; 1211 va_dcl 1212 #endif 1213 { 1214 va_list ap; 1215 #if __STDC__ 1216 va_start(ap, fmt); 1217 #else 1218 va_start(ap); 1219 #endif 1220 (void)printf("%d- ", n); 1221 (void)vprintf(fmt, ap); 1222 (void)printf("\r\n"); 1223 (void)fflush(stdout); 1224 if (debug) { 1225 syslog(LOG_DEBUG, "<--- %d- ", n); 1226 vsyslog(LOG_DEBUG, fmt, ap); 1227 } 1228 } 1229 1230 static void 1231 ack(s) 1232 char *s; 1233 { 1234 1235 reply(250, "%s command successful.", s); 1236 } 1237 1238 void 1239 nack(s) 1240 char *s; 1241 { 1242 1243 reply(502, "%s command not implemented.", s); 1244 } 1245 1246 /* ARGSUSED */ 1247 void 1248 yyerror(s) 1249 char *s; 1250 { 1251 char *cp; 1252 1253 if (cp = strchr(cbuf,'\n')) 1254 *cp = '\0'; 1255 reply(500, "'%s': command not understood.", cbuf); 1256 } 1257 1258 void 1259 delete(name) 1260 char *name; 1261 { 1262 struct stat st; 1263 1264 LOGCMD("delete", name); 1265 if (stat(name, &st) < 0) { 1266 perror_reply(550, name); 1267 return; 1268 } 1269 if ((st.st_mode&S_IFMT) == S_IFDIR) { 1270 if (rmdir(name) < 0) { 1271 perror_reply(550, name); 1272 return; 1273 } 1274 goto done; 1275 } 1276 if (unlink(name) < 0) { 1277 perror_reply(550, name); 1278 return; 1279 } 1280 done: 1281 ack("DELE"); 1282 } 1283 1284 void 1285 cwd(path) 1286 char *path; 1287 { 1288 1289 if (chdir(path) < 0) 1290 perror_reply(550, path); 1291 else 1292 ack("CWD"); 1293 } 1294 1295 void 1296 makedir(name) 1297 char *name; 1298 { 1299 1300 LOGCMD("mkdir", name); 1301 if (mkdir(name, 0777) < 0) 1302 perror_reply(550, name); 1303 else 1304 reply(257, "MKD command successful."); 1305 } 1306 1307 void 1308 removedir(name) 1309 char *name; 1310 { 1311 1312 LOGCMD("rmdir", name); 1313 if (rmdir(name) < 0) 1314 perror_reply(550, name); 1315 else 1316 ack("RMD"); 1317 } 1318 1319 void 1320 pwd() 1321 { 1322 char path[MAXPATHLEN + 1]; 1323 1324 if (getwd(path) == (char *)NULL) 1325 reply(550, "%s.", path); 1326 else 1327 reply(257, "\"%s\" is current directory.", path); 1328 } 1329 1330 char * 1331 renamefrom(name) 1332 char *name; 1333 { 1334 struct stat st; 1335 1336 if (stat(name, &st) < 0) { 1337 perror_reply(550, name); 1338 return ((char *)0); 1339 } 1340 reply(350, "File exists, ready for destination name"); 1341 return (name); 1342 } 1343 1344 void 1345 renamecmd(from, to) 1346 char *from, *to; 1347 { 1348 1349 LOGCMD2("rename", from, to); 1350 if (rename(from, to) < 0) 1351 perror_reply(550, "rename"); 1352 else 1353 ack("RNTO"); 1354 } 1355 1356 static void 1357 dolog(sin) 1358 struct sockaddr_in *sin; 1359 { 1360 struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr, 1361 sizeof(struct in_addr), AF_INET); 1362 1363 if (hp) 1364 (void) strncpy(remotehost, hp->h_name, sizeof(remotehost)); 1365 else 1366 (void) strncpy(remotehost, inet_ntoa(sin->sin_addr), 1367 sizeof(remotehost)); 1368 #ifdef HASSETPROCTITLE 1369 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 1370 setproctitle(proctitle); 1371 #endif /* HASSETPROCTITLE */ 1372 1373 if (logging) 1374 syslog(LOG_INFO, "connection from %s", remotehost); 1375 } 1376 1377 /* 1378 * Record logout in wtmp file 1379 * and exit with supplied status. 1380 */ 1381 void 1382 dologout(status) 1383 int status; 1384 { 1385 1386 if (logged_in) { 1387 (void) seteuid((uid_t)0); 1388 logwtmp(ttyline, "", ""); 1389 #if defined(KERBEROS) 1390 if (!notickets && krbtkfile_env) 1391 unlink(krbtkfile_env); 1392 #endif 1393 } 1394 /* beware of flushing buffers after a SIGPIPE */ 1395 _exit(status); 1396 } 1397 1398 static void 1399 myoob(signo) 1400 int signo; 1401 { 1402 char *cp; 1403 1404 /* only process if transfer occurring */ 1405 if (!transflag) 1406 return; 1407 cp = tmpline; 1408 if (getline(cp, 7, stdin) == NULL) { 1409 reply(221, "You could at least say goodbye."); 1410 dologout(0); 1411 } 1412 upper(cp); 1413 if (strcmp(cp, "ABOR\r\n") == 0) { 1414 tmpline[0] = '\0'; 1415 reply(426, "Transfer aborted. Data connection closed."); 1416 reply(226, "Abort successful"); 1417 longjmp(urgcatch, 1); 1418 } 1419 if (strcmp(cp, "STAT\r\n") == 0) { 1420 if (file_size != (off_t) -1) 1421 reply(213, "Status: %qd of %qd bytes transferred", 1422 byte_count, file_size); 1423 else 1424 reply(213, "Status: %qd bytes transferred", byte_count); 1425 } 1426 } 1427 1428 /* 1429 * Note: a response of 425 is not mentioned as a possible response to 1430 * the PASV command in RFC959. However, it has been blessed as 1431 * a legitimate response by Jon Postel in a telephone conversation 1432 * with Rick Adams on 25 Jan 89. 1433 */ 1434 void 1435 passive() 1436 { 1437 int len; 1438 char *p, *a; 1439 1440 pdata = socket(AF_INET, SOCK_STREAM, 0); 1441 if (pdata < 0) { 1442 perror_reply(425, "Can't open passive connection"); 1443 return; 1444 } 1445 pasv_addr = ctrl_addr; 1446 pasv_addr.sin_port = 0; 1447 (void) seteuid((uid_t)0); 1448 if (bind(pdata, (struct sockaddr *)&pasv_addr, sizeof(pasv_addr)) < 0) { 1449 (void) seteuid((uid_t)pw->pw_uid); 1450 goto pasv_error; 1451 } 1452 (void) seteuid((uid_t)pw->pw_uid); 1453 len = sizeof(pasv_addr); 1454 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 1455 goto pasv_error; 1456 if (listen(pdata, 1) < 0) 1457 goto pasv_error; 1458 a = (char *) &pasv_addr.sin_addr; 1459 p = (char *) &pasv_addr.sin_port; 1460 1461 #define UC(b) (((int) b) & 0xff) 1462 1463 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 1464 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 1465 return; 1466 1467 pasv_error: 1468 (void) close(pdata); 1469 pdata = -1; 1470 perror_reply(425, "Can't open passive connection"); 1471 return; 1472 } 1473 1474 /* 1475 * Generate unique name for file with basename "local". 1476 * The file named "local" is already known to exist. 1477 * Generates failure reply on error. 1478 */ 1479 static char * 1480 gunique(local) 1481 char *local; 1482 { 1483 static char new[MAXPATHLEN]; 1484 struct stat st; 1485 int count; 1486 char *cp; 1487 1488 cp = strrchr(local, '/'); 1489 if (cp) 1490 *cp = '\0'; 1491 if (stat(cp ? local : ".", &st) < 0) { 1492 perror_reply(553, cp ? local : "."); 1493 return ((char *) 0); 1494 } 1495 if (cp) 1496 *cp = '/'; 1497 (void) strcpy(new, local); 1498 cp = new + strlen(new); 1499 *cp++ = '.'; 1500 for (count = 1; count < 100; count++) { 1501 (void)sprintf(cp, "%d", count); 1502 if (stat(new, &st) < 0) 1503 return (new); 1504 } 1505 reply(452, "Unique file name cannot be created."); 1506 return (NULL); 1507 } 1508 1509 /* 1510 * Format and send reply containing system error number. 1511 */ 1512 void 1513 perror_reply(code, string) 1514 int code; 1515 char *string; 1516 { 1517 1518 reply(code, "%s: %s.", string, strerror(errno)); 1519 } 1520 1521 static char *onefile[] = { 1522 "", 1523 0 1524 }; 1525 1526 void 1527 send_file_list(whichf) 1528 char *whichf; 1529 { 1530 struct stat st; 1531 DIR *dirp = NULL; 1532 struct dirent *dir; 1533 FILE *dout = NULL; 1534 char **dirlist, *dirname; 1535 int simple = 0; 1536 int freeglob = 0; 1537 glob_t gl; 1538 1539 if (strpbrk(whichf, "~{[*?") != NULL) { 1540 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE; 1541 1542 memset(&gl, 0, sizeof(gl)); 1543 freeglob = 1; 1544 if (glob(whichf, flags, 0, &gl)) { 1545 reply(550, "not found"); 1546 goto out; 1547 } else if (gl.gl_pathc == 0) { 1548 errno = ENOENT; 1549 perror_reply(550, whichf); 1550 goto out; 1551 } 1552 dirlist = gl.gl_pathv; 1553 } else { 1554 onefile[0] = whichf; 1555 dirlist = onefile; 1556 simple = 1; 1557 } 1558 1559 if (setjmp(urgcatch)) { 1560 transflag = 0; 1561 goto out; 1562 } 1563 while (dirname = *dirlist++) { 1564 if (stat(dirname, &st) < 0) { 1565 /* 1566 * If user typed "ls -l", etc, and the client 1567 * used NLST, do what the user meant. 1568 */ 1569 if (dirname[0] == '-' && *dirlist == NULL && 1570 transflag == 0) { 1571 retrieve("/bin/ls %s", dirname); 1572 goto out; 1573 } 1574 perror_reply(550, whichf); 1575 if (dout != NULL) { 1576 (void) fclose(dout); 1577 transflag = 0; 1578 data = -1; 1579 pdata = -1; 1580 } 1581 goto out; 1582 } 1583 1584 if (S_ISREG(st.st_mode)) { 1585 if (dout == NULL) { 1586 dout = dataconn("file list", (off_t)-1, "w"); 1587 if (dout == NULL) 1588 goto out; 1589 transflag++; 1590 } 1591 fprintf(dout, "%s%s\n", dirname, 1592 type == TYPE_A ? "\r" : ""); 1593 byte_count += strlen(dirname) + 1; 1594 continue; 1595 } else if (!S_ISDIR(st.st_mode)) 1596 continue; 1597 1598 if ((dirp = opendir(dirname)) == NULL) 1599 continue; 1600 1601 while ((dir = readdir(dirp)) != NULL) { 1602 char nbuf[MAXPATHLEN]; 1603 1604 if (dir->d_name[0] == '.' && dir->d_namlen == 1) 1605 continue; 1606 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' && 1607 dir->d_namlen == 2) 1608 continue; 1609 1610 sprintf(nbuf, "%s/%s", dirname, dir->d_name); 1611 1612 /* 1613 * We have to do a stat to insure it's 1614 * not a directory or special file. 1615 */ 1616 if (simple || (stat(nbuf, &st) == 0 && 1617 S_ISREG(st.st_mode))) { 1618 if (dout == NULL) { 1619 dout = dataconn("file list", (off_t)-1, 1620 "w"); 1621 if (dout == NULL) 1622 goto out; 1623 transflag++; 1624 } 1625 if (nbuf[0] == '.' && nbuf[1] == '/') 1626 fprintf(dout, "%s%s\n", &nbuf[2], 1627 type == TYPE_A ? "\r" : ""); 1628 else 1629 fprintf(dout, "%s%s\n", nbuf, 1630 type == TYPE_A ? "\r" : ""); 1631 byte_count += strlen(nbuf) + 1; 1632 } 1633 } 1634 (void) closedir(dirp); 1635 } 1636 1637 if (dout == NULL) 1638 reply(550, "No files found."); 1639 else if (ferror(dout) != 0) 1640 perror_reply(550, "Data connection"); 1641 else 1642 reply(226, "Transfer complete."); 1643 1644 transflag = 0; 1645 if (dout != NULL) 1646 (void) fclose(dout); 1647 data = -1; 1648 pdata = -1; 1649 out: 1650 if (freeglob) { 1651 freeglob = 0; 1652 globfree(&gl); 1653 } 1654 } 1655
Indexes created Mon Sep 22 13:09:51 GMT 2025