2 * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
36 static char copyright[] =
37 "@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\
38 The Regents of the University of California. All rights reserved.\n";
44 static char sccsid[] = "@(#)ftpd.c 8.4 (Berkeley) 4/16/94";
48 #include <sys/cdefs.h>
49 __FBSDID("$FreeBSD$");
54 #include <sys/param.h>
55 #include <sys/ioctl.h>
57 #include <sys/socket.h>
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <netinet/tcp.h>
69 #include <arpa/inet.h>
70 #include <arpa/telnet.h>
93 #include <login_cap.h>
97 #include <security/pam_appl.h>
100 #include "pathnames.h"
105 static char version[] = "Version 6.00LS";
108 union sockunion ctrl_addr;
109 union sockunion data_source;
110 union sockunion data_dest;
111 union sockunion his_addr;
112 union sockunion pasv_addr;
117 int hostinfo = 1; /* print host-specific info in messages */
122 int timeout = 900; /* timeout after 15 minutes of inactivity */
123 int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
125 int restricted_data_ports = 1;
126 int paranoid = 1; /* be extra careful about security */
127 int anon_only = 0; /* Only anonymous ftp allowed */
128 int assumeutf8 = 0; /* Assume that server file names are in UTF-8 */
137 int stru; /* avoid C keyword */
139 int usedefault = 1; /* for data transfers */
140 int pdata = -1; /* for passive mode */
141 int readonly = 0; /* Server is in readonly mode. */
142 int noepsv = 0; /* EPSV command is disabled. */
143 int noretr = 0; /* RETR command is disabled. */
144 int noguestretr = 0; /* RETR command is disabled for anon users. */
145 int noguestmkd = 0; /* MKD command is disabled for anon users. */
146 int noguestmod = 1; /* anon users may not modify existing files. */
150 #if !defined(CMASK) || CMASK == 0
154 int defumask = CMASK; /* default umask value */
159 #ifdef VIRTUAL_HOSTING
162 static struct ftphost {
163 struct ftphost *next;
164 struct addrinfo *hostinfo;
170 } *thishost, *firsthost;
173 char remotehost[NI_MAXHOST];
176 static char wtmpid[20];
179 static int auth_pam(struct passwd**, const char*);
180 pam_handle_t *pamh = NULL;
183 static struct opie opiedata;
184 static char opieprompt[OPIE_CHALLENGE_MAX+1];
187 char *pid_file = NULL; /* means default location to pidfile(3) */
190 * Limit number of pathnames that glob can return.
191 * A limit of 0 indicates the number of pathnames is unlimited.
193 #define MAXGLOBARGS 16384
197 * Timeout intervals for retrying connections
198 * to hosts that don't accept PORT cmds. This
199 * is a kludge, but given the problems with TCP...
201 #define SWAITMAX 90 /* wait at most 90 seconds */
202 #define SWAITINT 5 /* interval between retries */
204 int swaitmax = SWAITMAX;
205 int swaitint = SWAITINT;
208 #ifdef OLD_SETPROCTITLE
209 char **Argv = NULL; /* pointer to argument vector */
210 char *LastArgv = NULL; /* end of argv */
211 #endif /* OLD_SETPROCTITLE */
212 char proctitle[LINE_MAX]; /* initial part of title */
213 #endif /* SETPROCTITLE */
215 #define LOGCMD(cmd, file) logcmd((cmd), (file), NULL, -1)
216 #define LOGCMD2(cmd, file1, file2) logcmd((cmd), (file1), (file2), -1)
217 #define LOGBYTES(cmd, file, cnt) logcmd((cmd), (file), NULL, (cnt))
219 static volatile sig_atomic_t recvurg;
220 static int transflag; /* NB: for debugging only */
222 #define STARTXFER flagxfer(1)
223 #define ENDXFER flagxfer(0)
225 #define START_UNSAFE maskurg(1)
226 #define END_UNSAFE maskurg(0)
228 /* It's OK to put an `else' clause after this macro. */
229 #define CHECKOOB(action) \
238 #ifdef VIRTUAL_HOSTING
239 static void inithosts(int);
240 static void selecthost(union sockunion *);
242 static void ack(char *);
243 static void sigurg(int);
244 static void maskurg(int);
245 static void flagxfer(int);
246 static int myoob(void);
247 static int checkuser(char *, char *, int, char **, int *);
248 static FILE *dataconn(char *, off_t, char *);
249 static void dolog(struct sockaddr *);
250 static void end_login(void);
251 static FILE *getdatasock(char *);
252 static int guniquefd(char *, char **);
253 static void lostconn(int);
254 static void sigquit(int);
255 static int receive_data(FILE *, FILE *);
256 static int send_data(FILE *, FILE *, size_t, off_t, int);
257 static struct passwd *
259 static char *sgetsave(char *);
260 static void reapchild(int);
261 static void appendf(char **, char *, ...) __printflike(2, 3);
262 static void logcmd(char *, char *, char *, off_t);
263 static void logxfer(char *, off_t, time_t);
264 static char *doublequote(char *);
265 static int *socksetup(int, char *, const char *);
268 main(int argc, char *argv[], char **envp)
272 char *cp, line[LINE_MAX];
274 char *bindname = NULL;
275 const char *bindport = "ftp";
276 int family = AF_UNSPEC;
279 tzset(); /* in case no timezone database in ~ftp */
280 sigemptyset(&sa.sa_mask);
281 sa.sa_flags = SA_RESTART;
283 #ifdef OLD_SETPROCTITLE
285 * Save start and extent of argv for setproctitle.
290 LastArgv = envp[-1] + strlen(envp[-1]);
291 #endif /* OLD_SETPROCTITLE */
294 * Prevent diagnostic messages from appearing on stderr.
295 * We run as a daemon or from inetd; in both cases, there's
296 * more reason in logging to syslog.
298 (void) freopen(_PATH_DEVNULL, "w", stderr);
302 * LOG_NDELAY sets up the logging connection immediately,
303 * necessary for anonymous ftp's that chroot and can't do it later.
305 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
307 while ((ch = getopt(argc, argv,
308 "468a:AdDEhlmMoOp:P:rRSt:T:u:UvW")) != -1) {
311 family = (family == AF_INET6) ? AF_UNSPEC : AF_INET;
315 family = (family == AF_INET) ? AF_UNSPEC : AF_INET6;
347 logging++; /* > 1 == extra logging */
387 timeout = atoi(optarg);
388 if (maxtimeout < timeout)
389 maxtimeout = timeout;
393 maxtimeout = atoi(optarg);
394 if (timeout > maxtimeout)
395 timeout = maxtimeout;
402 val = strtol(optarg, &optarg, 8);
403 if (*optarg != '\0' || val < 0)
404 syslog(LOG_WARNING, "bad value for -u");
410 restricted_data_ports = 0;
422 syslog(LOG_WARNING, "unknown flag -%c ignored", optopt);
428 int *ctl_sock, fd, maxfd = -1, nfds, i;
429 fd_set defreadfds, readfds;
433 if ((pfh = pidfile_open(pid_file, 0600, &pid)) == NULL) {
434 if (errno == EEXIST) {
435 syslog(LOG_ERR, "%s already running, pid %d",
436 getprogname(), (int)pid);
439 syslog(LOG_WARNING, "pidfile_open: %m");
443 * Detach from parent.
445 if (daemon(1, 1) < 0) {
446 syslog(LOG_ERR, "failed to become a daemon");
450 if (pfh != NULL && pidfile_write(pfh) == -1)
451 syslog(LOG_WARNING, "pidfile_write: %m");
453 sa.sa_handler = reapchild;
454 (void)sigaction(SIGCHLD, &sa, NULL);
456 #ifdef VIRTUAL_HOSTING
461 * Open a socket, bind it to the FTP port, and start
464 ctl_sock = socksetup(family, bindname, bindport);
465 if (ctl_sock == NULL)
468 FD_ZERO(&defreadfds);
469 for (i = 1; i <= *ctl_sock; i++) {
470 FD_SET(ctl_sock[i], &defreadfds);
471 if (listen(ctl_sock[i], 32) < 0) {
472 syslog(LOG_ERR, "control listen: %m");
475 if (maxfd < ctl_sock[i])
480 * Loop forever accepting connection requests and forking off
481 * children to handle them.
484 FD_COPY(&defreadfds, &readfds);
485 nfds = select(maxfd + 1, &readfds, NULL, NULL, 0);
487 if (nfds < 0 && errno != EINTR)
488 syslog(LOG_WARNING, "select: %m");
493 for (i = 1; i <= *ctl_sock; i++)
494 if (FD_ISSET(ctl_sock[i], &readfds)) {
495 addrlen = sizeof(his_addr);
496 fd = accept(ctl_sock[i],
497 (struct sockaddr *)&his_addr,
504 switch (pid = fork()) {
510 for (i = 1; i <= *ctl_sock; i++)
516 syslog(LOG_WARNING, "fork: %m");
524 addrlen = sizeof(his_addr);
525 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
526 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
530 #ifdef VIRTUAL_HOSTING
531 if (his_addr.su_family == AF_INET6 &&
532 IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr))
535 family = his_addr.su_family;
541 sa.sa_handler = SIG_DFL;
542 (void)sigaction(SIGCHLD, &sa, NULL);
544 sa.sa_handler = sigurg;
545 sa.sa_flags = 0; /* don't restart syscalls for SIGURG */
546 (void)sigaction(SIGURG, &sa, NULL);
548 sigfillset(&sa.sa_mask); /* block all signals in handler */
549 sa.sa_flags = SA_RESTART;
550 sa.sa_handler = sigquit;
551 (void)sigaction(SIGHUP, &sa, NULL);
552 (void)sigaction(SIGINT, &sa, NULL);
553 (void)sigaction(SIGQUIT, &sa, NULL);
554 (void)sigaction(SIGTERM, &sa, NULL);
556 sa.sa_handler = lostconn;
557 (void)sigaction(SIGPIPE, &sa, NULL);
559 addrlen = sizeof(ctrl_addr);
560 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
561 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
564 dataport = ntohs(ctrl_addr.su_port) - 1; /* as per RFC 959 */
565 #ifdef VIRTUAL_HOSTING
566 /* select our identity from virtual host table */
567 selecthost(&ctrl_addr);
570 if (ctrl_addr.su_family == AF_INET)
572 tos = IPTOS_LOWDELAY;
573 if (setsockopt(0, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
574 syslog(LOG_WARNING, "control setsockopt (IP_TOS): %m");
578 * Disable Nagle on the control channel so that we don't have to wait
579 * for peer's ACK before issuing our next reply.
581 if (setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
582 syslog(LOG_WARNING, "control setsockopt (TCP_NODELAY): %m");
584 data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1);
586 (void)snprintf(wtmpid, sizeof(wtmpid), "%xftpd", getpid());
588 /* Try to handle urgent data inline */
590 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on)) < 0)
591 syslog(LOG_WARNING, "control setsockopt (SO_OOBINLINE): %m");
595 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
596 syslog(LOG_ERR, "fcntl F_SETOWN: %m");
598 dolog((struct sockaddr *)&his_addr);
600 * Set up default state
609 /* If logins are disabled, print out the message. */
610 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
611 while (fgets(line, sizeof(line), fd) != NULL) {
612 if ((cp = strchr(line, '\n')) != NULL)
614 lreply(530, "%s", line);
616 (void) fflush(stdout);
618 reply(530, "System not available.");
621 #ifdef VIRTUAL_HOSTING
622 fd = fopen(thishost->welcome, "r");
624 fd = fopen(_PATH_FTPWELCOME, "r");
627 while (fgets(line, sizeof(line), fd) != NULL) {
628 if ((cp = strchr(line, '\n')) != NULL)
630 lreply(220, "%s", line);
632 (void) fflush(stdout);
634 /* reply(220,) must follow */
636 #ifndef VIRTUAL_HOSTING
637 if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
638 fatalerror("Ran out of memory.");
639 if (gethostname(hostname, MAXHOSTNAMELEN - 1) < 0)
641 hostname[MAXHOSTNAMELEN - 1] = '\0';
644 reply(220, "%s FTP server (%s) ready.", hostname, version);
646 reply(220, "FTP server ready.");
657 syslog(LOG_DEBUG, "lost connection");
665 syslog(LOG_ERR, "got signal %d", signo);
669 #ifdef VIRTUAL_HOSTING
671 * read in virtual host tables (if they exist)
675 inithosts(int family)
680 char *cp, *mp, *line;
682 char *vhost, *anonuser, *statfile, *welcome, *loginmsg;
683 struct ftphost *hrp, *lhrp;
684 struct addrinfo hints, *res, *ai;
687 * Fill in the default host information
689 if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
690 fatalerror("Ran out of memory.");
691 if (gethostname(hostname, MAXHOSTNAMELEN - 1) < 0)
693 hostname[MAXHOSTNAMELEN - 1] = '\0';
694 if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
695 fatalerror("Ran out of memory.");
696 hrp->hostname = hostname;
697 hrp->hostinfo = NULL;
699 memset(&hints, 0, sizeof(hints));
700 hints.ai_flags = AI_PASSIVE;
701 hints.ai_family = family;
702 hints.ai_socktype = SOCK_STREAM;
703 if (getaddrinfo(hrp->hostname, NULL, &hints, &res) == 0)
705 hrp->statfile = _PATH_FTPDSTATFILE;
706 hrp->welcome = _PATH_FTPWELCOME;
707 hrp->loginmsg = _PATH_FTPLOGINMESG;
708 hrp->anonuser = "ftp";
710 thishost = firsthost = lhrp = hrp;
711 if ((fp = fopen(_PATH_FTPHOSTS, "r")) != NULL) {
712 int addrsize, gothost;
716 while ((line = fgetln(fp, &len)) != NULL) {
722 if (line[len - 1] == '\n') {
723 line[len - 1] = '\0';
726 if ((mp = malloc(len + 1)) == NULL)
727 fatalerror("Ran out of memory.");
728 memcpy(mp, line, len);
732 cp = strtok(line, " \t");
733 /* skip empty lines */
740 statfile = _PATH_FTPDSTATFILE;
741 welcome = _PATH_FTPWELCOME;
742 loginmsg = _PATH_FTPLOGINMESG;
745 * Preparse the line so we can use its info
746 * for all the addresses associated with
747 * the virtual host name.
748 * Field 0, the virtual host name, is special:
749 * it's already parsed off and will be strdup'ed
750 * later, after we know its canonical form.
752 for (i = 1; i < 5 && (cp = strtok(NULL, " \t")); i++)
753 if (*cp != '-' && (cp = strdup(cp)))
755 case 1: /* anon user permissions */
758 case 2: /* statistics file */
761 case 3: /* welcome message */
764 case 4: /* login message */
767 default: /* programming error */
772 hints.ai_flags = AI_PASSIVE;
773 hints.ai_family = family;
774 hints.ai_socktype = SOCK_STREAM;
775 if (getaddrinfo(vhost, NULL, &hints, &res) != 0)
777 for (ai = res; ai != NULL && ai->ai_addr != NULL;
781 for (hrp = firsthost; hrp != NULL; hrp = hrp->next) {
784 for (hi = hrp->hostinfo; hi != NULL;
786 if (hi->ai_addrlen == ai->ai_addrlen &&
789 ai->ai_addr->sa_len) == 0) {
797 if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
799 hrp->hostname = NULL;
802 if (hrp->hostinfo && hrp->hostinfo != res)
803 freeaddrinfo(hrp->hostinfo);
804 insert = 0; /* host already in the chain */
809 * determine hostname to use.
810 * force defined name if there is a valid alias
811 * otherwise fallback to primary hostname
813 /* XXX: getaddrinfo() can't do alias check */
814 switch(hrp->hostinfo->ai_family) {
816 addr = &((struct sockaddr_in *)hrp->hostinfo->ai_addr)->sin_addr;
817 addrsize = sizeof(struct in_addr);
820 addr = &((struct sockaddr_in6 *)hrp->hostinfo->ai_addr)->sin6_addr;
821 addrsize = sizeof(struct in6_addr);
824 /* should not reach here */
825 freeaddrinfo(hrp->hostinfo);
827 free(hrp); /*not in chain, can free*/
829 hrp->hostinfo = NULL; /*mark as blank*/
833 if ((hp = getipnodebyaddr(addr, addrsize,
834 hrp->hostinfo->ai_family,
835 &hp_error)) != NULL) {
836 if (strcmp(vhost, hp->h_name) != 0) {
837 if (hp->h_aliases == NULL)
841 while (hp->h_aliases[i] &&
842 strcmp(vhost, hp->h_aliases[i]) != 0)
844 if (hp->h_aliases[i] == NULL)
850 strcmp(hrp->hostname, vhost) != 0) {
852 hrp->hostname = NULL;
854 if (hrp->hostname == NULL &&
855 (hrp->hostname = strdup(vhost)) == NULL) {
856 freeaddrinfo(hrp->hostinfo);
857 hrp->hostinfo = NULL; /* mark as blank */
862 hrp->anonuser = anonuser;
863 hrp->statfile = statfile;
864 hrp->welcome = welcome;
865 hrp->loginmsg = loginmsg;
883 selecthost(union sockunion *su)
888 struct in6_addr *mapped_in6 = NULL;
894 * XXX IPv4 mapped IPv6 addr consideraton,
895 * specified in rfc2373.
897 if (su->su_family == AF_INET6 &&
898 IN6_IS_ADDR_V4MAPPED(&su->su_sin6.sin6_addr))
899 mapped_in6 = &su->su_sin6.sin6_addr;
902 hrp = thishost = firsthost; /* default */
905 while (hrp != NULL) {
906 for (hi = hrp->hostinfo; hi != NULL; hi = hi->ai_next) {
907 if (memcmp(su, hi->ai_addr, hi->ai_addrlen) == 0) {
912 /* XXX IPv4 mapped IPv6 addr consideraton */
913 if (hi->ai_addr->sa_family == AF_INET && mapped_in6 != NULL &&
914 (memcmp(&mapped_in6->s6_addr[12],
915 &((struct sockaddr_in *)hi->ai_addr)->sin_addr,
916 sizeof(struct in_addr)) == 0)) {
926 /* setup static variables as appropriate */
927 hostname = thishost->hostname;
928 ftpuser = thishost->anonuser;
933 * Helper function for sgetpwnam().
938 char *new = malloc(strlen(s) + 1);
941 reply(421, "Ran out of memory.");
945 (void) strcpy(new, s);
950 * Save the result of a getpwnam. Used for USER command, since
951 * the data returned must not be clobbered by any other command
953 * NB: The data returned by sgetpwnam() will remain valid until
954 * the next call to this function. Its difference from getpwnam()
955 * is that sgetpwnam() is known to be called from ftpd code only.
957 static struct passwd *
958 sgetpwnam(char *name)
960 static struct passwd save;
963 if ((p = getpwnam(name)) == NULL)
967 free(save.pw_passwd);
973 save.pw_name = sgetsave(p->pw_name);
974 save.pw_passwd = sgetsave(p->pw_passwd);
975 save.pw_gecos = sgetsave(p->pw_gecos);
976 save.pw_dir = sgetsave(p->pw_dir);
977 save.pw_shell = sgetsave(p->pw_shell);
981 static int login_attempts; /* number of failed login attempts */
982 static int askpasswd; /* had user command, ask for passwd */
983 static char curname[MAXLOGNAME]; /* current USER name */
987 * Sets global passwd pointer pw if named account exists and is acceptable;
988 * sets askpasswd if a PASS command is expected. If logged in previously,
989 * need to reset state. If name is "ftp" or "anonymous", the name is not in
990 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
991 * If account doesn't exist, ask for passwd anyway. Otherwise, check user
992 * requesting login privileges. Disallow anyone who does not have a standard
993 * shell as returned by getusershell(). Disallow anyone mentioned in the file
994 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
1004 reply(530, "Can't change user from guest login.");
1006 } else if (dochroot) {
1007 reply(530, "Can't change user from chroot user.");
1014 #ifdef VIRTUAL_HOSTING
1015 pw = sgetpwnam(thishost->anonuser);
1017 pw = sgetpwnam("ftp");
1019 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
1020 if (checkuser(_PATH_FTPUSERS, "ftp", 0, NULL, &ecode) ||
1021 (ecode != 0 && ecode != ENOENT))
1022 reply(530, "User %s access denied.", name);
1023 else if (checkuser(_PATH_FTPUSERS, "anonymous", 0, NULL, &ecode) ||
1024 (ecode != 0 && ecode != ENOENT))
1025 reply(530, "User %s access denied.", name);
1026 else if (pw != NULL) {
1030 "Guest login ok, send your email address as password.");
1032 reply(530, "User %s unknown.", name);
1033 if (!askpasswd && logging)
1035 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost);
1038 if (anon_only != 0) {
1039 reply(530, "Sorry, only anonymous ftp allowed.");
1043 if ((pw = sgetpwnam(name))) {
1044 if ((shell = pw->pw_shell) == NULL || *shell == 0)
1045 shell = _PATH_BSHELL;
1047 while ((cp = getusershell()) != NULL)
1048 if (strcmp(cp, shell) == 0)
1053 (checkuser(_PATH_FTPUSERS, name, 1, NULL, &ecode) ||
1054 (ecode != 0 && ecode != ENOENT))) {
1055 reply(530, "User %s access denied.", name);
1058 "FTP LOGIN REFUSED FROM %s, %s",
1065 strncpy(curname, name, sizeof(curname)-1);
1069 /* XXX Kluge! The conversation mechanism needs to be fixed. */
1071 if (opiechallenge(&opiedata, name, opieprompt) == 0) {
1072 pwok = (pw != NULL) &&
1073 opieaccessfile(remotehost) &&
1074 opiealways(pw->pw_dir);
1075 reply(331, "Response to %s %s for %s.",
1076 opieprompt, pwok ? "requested" : "required", name);
1079 reply(331, "Password required for %s.", name);
1083 * Delay before reading passwd after first failed
1084 * attempt to slow down passwd-guessing programs.
1087 sleep(login_attempts);
1091 * Check if a user is in the file "fname",
1092 * return a pointer to a malloc'd string with the rest
1093 * of the matching line in "residue" if not NULL.
1096 checkuser(char *fname, char *name, int pwset, char **residue, int *ecode)
1101 char *line, *mp, *p;
1105 if ((fd = fopen(fname, "r")) != NULL) {
1106 while (!found && (line = fgetln(fd, &len)) != NULL) {
1110 if (line[len - 1] == '\n') {
1111 line[len - 1] = '\0';
1114 if ((mp = malloc(len + 1)) == NULL)
1115 fatalerror("Ran out of memory.");
1116 memcpy(mp, line, len);
1120 /* avoid possible leading and trailing whitespace */
1121 p = strtok(line, " \t");
1122 /* skip empty lines */
1126 * if first chr is '@', check group membership
1132 if (p[1] == '\0') /* single @ matches anyone */
1135 if ((grp = getgrnam(p+1)) == NULL)
1138 * Check user's default group
1140 if (pwset && grp->gr_gid == pw->pw_gid)
1143 * Check supplementary groups
1145 while (!found && grp->gr_mem[i])
1146 found = strcmp(name,
1152 * Otherwise, just check for username match
1155 found = strcmp(p, name) == 0;
1157 * Save the rest of line to "residue" if matched
1159 if (found && residue) {
1160 if ((p = strtok(NULL, "")) != NULL)
1161 p += strspn(p, " \t");
1163 if ((*residue = strdup(p)) == NULL)
1164 fatalerror("Ran out of memory.");
1173 } else if (ecode != NULL)
1179 * Terminate login as previous user, if any, resetting state;
1180 * used when USER command is given or login fails.
1190 if (logged_in && dowtmp)
1191 ftpd_logwtmp(wtmpid, NULL, NULL);
1194 setusercontext(NULL, getpwuid(0), 0,
1195 LOGIN_SETPRIORITY|LOGIN_SETRESOURCES|LOGIN_SETUMASK|
1200 if ((e = pam_setcred(pamh, PAM_DELETE_CRED)) != PAM_SUCCESS)
1201 syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
1202 if ((e = pam_close_session(pamh,0)) != PAM_SUCCESS)
1203 syslog(LOG_ERR, "pam_close_session: %s", pam_strerror(pamh, e));
1204 if ((e = pam_end(pamh, e)) != PAM_SUCCESS)
1205 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1217 * the following code is stolen from imap-uw PAM authentication module and
1220 #define COPY_STRING(s) (s ? strdup(s) : NULL)
1223 const char *uname; /* user name */
1224 const char *pass; /* password */
1226 typedef struct cred_t cred_t;
1229 auth_conv(int num_msg, const struct pam_message **msg,
1230 struct pam_response **resp, void *appdata)
1233 cred_t *cred = (cred_t *) appdata;
1234 struct pam_response *reply;
1236 reply = calloc(num_msg, sizeof *reply);
1240 for (i = 0; i < num_msg; i++) {
1241 switch (msg[i]->msg_style) {
1242 case PAM_PROMPT_ECHO_ON: /* assume want user name */
1243 reply[i].resp_retcode = PAM_SUCCESS;
1244 reply[i].resp = COPY_STRING(cred->uname);
1245 /* PAM frees resp. */
1247 case PAM_PROMPT_ECHO_OFF: /* assume want password */
1248 reply[i].resp_retcode = PAM_SUCCESS;
1249 reply[i].resp = COPY_STRING(cred->pass);
1250 /* PAM frees resp. */
1254 reply[i].resp_retcode = PAM_SUCCESS;
1255 reply[i].resp = NULL;
1257 default: /* unknown message style */
1259 return PAM_CONV_ERR;
1268 * Attempt to authenticate the user using PAM. Returns 0 if the user is
1269 * authenticated, or 1 if not authenticated. If some sort of PAM system
1270 * error occurs (e.g., the "/etc/pam.conf" file is missing) then this
1271 * function returns -1. This can be used as an indication that we should
1272 * fall back to a different authentication mechanism.
1275 auth_pam(struct passwd **ppw, const char *pass)
1277 const char *tmpl_user;
1281 cred_t auth_cred = { (*ppw)->pw_name, pass };
1282 struct pam_conv conv = { &auth_conv, &auth_cred };
1284 e = pam_start("ftpd", (*ppw)->pw_name, &conv, &pamh);
1285 if (e != PAM_SUCCESS) {
1287 * In OpenPAM, it's OK to pass NULL to pam_strerror()
1288 * if context creation has failed in the first place.
1290 syslog(LOG_ERR, "pam_start: %s", pam_strerror(NULL, e));
1294 e = pam_set_item(pamh, PAM_RHOST, remotehost);
1295 if (e != PAM_SUCCESS) {
1296 syslog(LOG_ERR, "pam_set_item(PAM_RHOST): %s",
1297 pam_strerror(pamh, e));
1298 if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
1299 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1305 e = pam_authenticate(pamh, 0);
1309 * With PAM we support the concept of a "template"
1310 * user. The user enters a login name which is
1311 * authenticated by PAM, usually via a remote service
1312 * such as RADIUS or TACACS+. If authentication
1313 * succeeds, a different but related "template" name
1314 * is used for setting the credentials, shell, and
1315 * home directory. The name the user enters need only
1316 * exist on the remote authentication server, but the
1317 * template name must be present in the local password
1320 * This is supported by two various mechanisms in the
1321 * individual modules. However, from the application's
1322 * point of view, the template user is always passed
1323 * back as a changed value of the PAM_USER item.
1325 if ((e = pam_get_item(pamh, PAM_USER, &item)) ==
1327 tmpl_user = (const char *) item;
1328 if (strcmp((*ppw)->pw_name, tmpl_user) != 0)
1329 *ppw = getpwnam(tmpl_user);
1331 syslog(LOG_ERR, "Couldn't get PAM_USER: %s",
1332 pam_strerror(pamh, e));
1337 case PAM_USER_UNKNOWN:
1343 syslog(LOG_ERR, "pam_authenticate: %s", pam_strerror(pamh, e));
1349 e = pam_acct_mgmt(pamh, 0);
1350 if (e != PAM_SUCCESS) {
1351 syslog(LOG_ERR, "pam_acct_mgmt: %s",
1352 pam_strerror(pamh, e));
1358 if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
1359 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1366 #endif /* USE_PAM */
1374 login_cap_t *lc = NULL;
1379 char *residue = NULL;
1382 if (logged_in || askpasswd == 0) {
1383 reply(503, "Login with USER first.");
1387 if (!guest) { /* "ftp" is only account allowed no password */
1389 rval = 1; /* failure below */
1393 rval = auth_pam(&pw, passwd);
1399 if (opieverify(&opiedata, passwd) == 0)
1400 xpasswd = pw->pw_passwd;
1402 xpasswd = crypt(passwd, pw->pw_passwd);
1403 if (passwd[0] == '\0' && pw->pw_passwd[0] != '\0')
1409 rval = strcmp(pw->pw_passwd, xpasswd);
1410 if (pw->pw_expire && time(NULL) >= pw->pw_expire)
1411 rval = 1; /* failure */
1414 * If rval == 1, the user failed the authentication check
1415 * above. If rval == 0, either PAM or local authentication
1419 reply(530, "Login incorrect.");
1422 "FTP LOGIN FAILED FROM %s",
1424 syslog(LOG_AUTHPRIV | LOG_NOTICE,
1425 "FTP LOGIN FAILED FROM %s, %s",
1426 remotehost, curname);
1429 if (login_attempts++ >= 5) {
1431 "repeated login failures from %s",
1438 login_attempts = 0; /* this time successful */
1439 if (setegid(pw->pw_gid) < 0) {
1440 reply(550, "Can't set gid.");
1443 /* May be overridden by login.conf */
1444 (void) umask(defumask);
1446 if ((lc = login_getpwclass(pw)) != NULL) {
1447 char remote_ip[NI_MAXHOST];
1449 if (getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
1450 remote_ip, sizeof(remote_ip) - 1, NULL, 0,
1453 remote_ip[sizeof(remote_ip) - 1] = 0;
1454 if (!auth_hostok(lc, remotehost, remote_ip)) {
1455 syslog(LOG_INFO|LOG_AUTH,
1456 "FTP LOGIN FAILED (HOST) as %s: permission denied.",
1458 reply(530, "Permission denied.");
1462 if (!auth_timeok(lc, time(NULL))) {
1463 reply(530, "Login not available right now.");
1468 setusercontext(lc, pw, 0,
1469 LOGIN_SETLOGIN|LOGIN_SETGROUP|LOGIN_SETPRIORITY|
1470 LOGIN_SETRESOURCES|LOGIN_SETUMASK|LOGIN_SETMAC);
1472 setlogin(pw->pw_name);
1473 (void) initgroups(pw->pw_name, pw->pw_gid);
1478 if ((e = pam_open_session(pamh, 0)) != PAM_SUCCESS) {
1479 syslog(LOG_ERR, "pam_open_session: %s", pam_strerror(pamh, e));
1480 } else if ((e = pam_setcred(pamh, PAM_ESTABLISH_CRED)) != PAM_SUCCESS) {
1481 syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
1487 checkuser(_PATH_FTPCHROOT, pw->pw_name, 1, &residue, &ecode)
1488 #ifdef LOGIN_CAP /* Allow login.conf configuration as well */
1489 || login_getcapbool(lc, "ftp-chroot", 0)
1493 * It is possible that checkuser() failed to open the chroot file.
1494 * If this is the case, report that logins are un-available, since we
1495 * have no way of checking whether or not the user should be chrooted.
1496 * We ignore ENOENT since it is not required that this file be present.
1498 if (ecode != 0 && ecode != ENOENT) {
1499 reply(530, "Login not available right now.");
1504 /* Disable wtmp logging when chrooting. */
1505 if (dochroot || guest)
1508 ftpd_logwtmp(wtmpid, pw->pw_name,
1509 (struct sockaddr *)&his_addr);
1512 if (guest && stats && statfd < 0)
1513 #ifdef VIRTUAL_HOSTING
1514 statfd = open(thishost->statfile, O_WRONLY|O_APPEND);
1516 statfd = open(_PATH_FTPDSTATFILE, O_WRONLY|O_APPEND);
1522 * For a chrooted local user,
1523 * a) see whether ftpchroot(5) specifies a chroot directory,
1524 * b) extract the directory pathname from the line,
1525 * c) expand it to the absolute pathname if necessary.
1527 if (dochroot && residue &&
1528 (chrootdir = strtok(residue, " \t")) != NULL) {
1529 if (chrootdir[0] != '/')
1530 asprintf(&chrootdir, "%s/%s", pw->pw_dir, chrootdir);
1532 chrootdir = strdup(chrootdir); /* make it permanent */
1533 if (chrootdir == NULL)
1534 fatalerror("Ran out of memory.");
1536 if (guest || dochroot) {
1538 * If no chroot directory set yet, use the login directory.
1539 * Copy it so it can be modified while pw->pw_dir stays intact.
1541 if (chrootdir == NULL &&
1542 (chrootdir = strdup(pw->pw_dir)) == NULL)
1543 fatalerror("Ran out of memory.");
1545 * Check for the "/chroot/./home" syntax,
1546 * separate the chroot and home directory pathnames.
1548 if ((homedir = strstr(chrootdir, "/./")) != NULL) {
1549 *(homedir++) = '\0'; /* wipe '/' */
1550 homedir++; /* skip '.' */
1553 * We MUST do a chdir() after the chroot. Otherwise
1554 * the old current directory will be accessible as "."
1555 * outside the new root!
1560 * Finally, do chroot()
1562 if (chroot(chrootdir) < 0) {
1563 reply(550, "Can't change root.");
1566 } else /* real user w/o chroot */
1567 homedir = pw->pw_dir;
1569 * Set euid *before* doing chdir() so
1570 * a) the user won't be carried to a directory that he couldn't reach
1571 * on his own due to no permission to upper path components,
1572 * b) NFS mounted homedirs w/restrictive permissions will be accessible
1573 * (uid 0 has no root power over NFS if not mapped explicitly.)
1575 if (seteuid(pw->pw_uid) < 0) {
1576 reply(550, "Can't set uid.");
1579 if (chdir(homedir) < 0) {
1580 if (guest || dochroot) {
1581 reply(550, "Can't change to base directory.");
1584 if (chdir("/") < 0) {
1585 reply(550, "Root is inaccessible.");
1588 lreply(230, "No directory! Logging in with home=/.");
1593 * Display a login message, if it exists.
1594 * N.B. reply(230,) must follow the message.
1596 #ifdef VIRTUAL_HOSTING
1597 fd = fopen(thishost->loginmsg, "r");
1599 fd = fopen(_PATH_FTPLOGINMESG, "r");
1602 char *cp, line[LINE_MAX];
1604 while (fgets(line, sizeof(line), fd) != NULL) {
1605 if ((cp = strchr(line, '\n')) != NULL)
1607 lreply(230, "%s", line);
1609 (void) fflush(stdout);
1615 ident = strdup(passwd);
1617 fatalerror("Ran out of memory.");
1619 reply(230, "Guest login ok, access restrictions apply.");
1621 #ifdef VIRTUAL_HOSTING
1622 if (thishost != firsthost)
1623 snprintf(proctitle, sizeof(proctitle),
1624 "%s: anonymous(%s)/%s", remotehost, hostname,
1628 snprintf(proctitle, sizeof(proctitle),
1629 "%s: anonymous/%s", remotehost, passwd);
1630 setproctitle("%s", proctitle);
1631 #endif /* SETPROCTITLE */
1633 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s",
1634 remotehost, passwd);
1637 reply(230, "User %s logged in, "
1638 "access restrictions apply.", pw->pw_name);
1640 reply(230, "User %s logged in.", pw->pw_name);
1643 snprintf(proctitle, sizeof(proctitle),
1644 "%s: user/%s", remotehost, pw->pw_name);
1645 setproctitle("%s", proctitle);
1646 #endif /* SETPROCTITLE */
1648 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s",
1649 remotehost, pw->pw_name);
1651 if (logging && (guest || dochroot))
1652 syslog(LOG_INFO, "session root changed to %s", chrootdir);
1660 /* Forget all about it... */
1670 retrieve(char *cmd, char *name)
1674 int (*closefunc)(FILE *);
1678 fin = fopen(name, "r"), closefunc = fclose;
1683 (void) snprintf(line, sizeof(line), cmd, name), name = line;
1684 fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose;
1686 st.st_blksize = BUFSIZ;
1690 perror_reply(550, name);
1692 LOGCMD("get", name);
1699 if (fstat(fileno(fin), &st) < 0) {
1700 perror_reply(550, name);
1703 if (!S_ISREG(st.st_mode)) {
1705 * Never sending a raw directory is a workaround
1706 * for buggy clients that will attempt to RETR
1707 * a directory before listing it, e.g., Mozilla.
1708 * Preventing a guest from getting irregular files
1709 * is a simple security measure.
1711 if (S_ISDIR(st.st_mode) || guest) {
1712 reply(550, "%s: not a plain file.", name);
1716 /* st.st_blksize is set for all descriptor types */
1719 if (restart_point) {
1720 if (type == TYPE_A) {
1727 if ((c=getc(fin)) == EOF) {
1728 perror_reply(550, name);
1734 } else if (lseek(fileno(fin), restart_point, L_SET) < 0) {
1735 perror_reply(550, name);
1739 dout = dataconn(name, st.st_size, "w");
1743 send_data(fin, dout, st.st_blksize, st.st_size,
1744 restart_point == 0 && cmd == 0 && S_ISREG(st.st_mode));
1745 if (cmd == 0 && guest && stats && byte_count > 0)
1746 logxfer(name, byte_count, start);
1747 (void) fclose(dout);
1752 LOGBYTES("get", name, byte_count);
1757 store(char *name, char *mode, int unique)
1761 int (*closefunc)(FILE *);
1763 if (*mode == 'a') { /* APPE */
1765 /* Programming error */
1766 syslog(LOG_ERR, "Internal: unique flag to APPE");
1769 if (guest && noguestmod) {
1770 reply(550, "Appending to existing file denied.");
1773 restart_point = 0; /* not affected by preceding REST */
1775 if (unique) /* STOU overrides REST */
1777 if (guest && noguestmod) {
1778 if (restart_point) { /* guest STOR w/REST */
1779 reply(550, "Modifying existing file denied.");
1781 } else /* treat guest STOR as STOU */
1786 mode = "r+"; /* so ASCII manual seek can work */
1788 if ((fd = guniquefd(name, &name)) < 0)
1790 fout = fdopen(fd, mode);
1792 fout = fopen(name, mode);
1795 perror_reply(553, name);
1799 if (restart_point) {
1800 if (type == TYPE_A) {
1807 if ((c=getc(fout)) == EOF) {
1808 perror_reply(550, name);
1815 * We must do this seek to "current" position
1816 * because we are changing from reading to
1819 if (fseeko(fout, 0, SEEK_CUR) < 0) {
1820 perror_reply(550, name);
1823 } else if (lseek(fileno(fout), restart_point, L_SET) < 0) {
1824 perror_reply(550, name);
1828 din = dataconn(name, -1, "r");
1831 if (receive_data(din, fout) == 0) {
1833 reply(226, "Transfer complete (unique file name:%s).",
1836 reply(226, "Transfer complete.");
1842 LOGBYTES(*mode == 'a' ? "append" : "put", name, byte_count);
1846 LOGCMD(*mode == 'a' ? "append" : "put" , name);
1851 getdatasock(char *mode)
1853 int on = 1, s, t, tries;
1856 return (fdopen(data, mode));
1858 s = socket(data_dest.su_family, SOCK_STREAM, 0);
1861 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
1862 syslog(LOG_WARNING, "data setsockopt (SO_REUSEADDR): %m");
1863 /* anchor socket to avoid multi-homing problems */
1864 data_source = ctrl_addr;
1865 data_source.su_port = htons(dataport);
1867 for (tries = 1; ; tries++) {
1869 * We should loop here since it's possible that
1870 * another ftpd instance has passed this point and is
1871 * trying to open a data connection in active mode now.
1872 * Until the other connection is opened, we'll be getting
1873 * EADDRINUSE because no SOCK_STREAM sockets in the system
1874 * can share both local and remote addresses, localIP:20
1875 * and *:* in this case.
1877 if (bind(s, (struct sockaddr *)&data_source,
1878 data_source.su_len) >= 0)
1880 if (errno != EADDRINUSE || tries > 10)
1884 (void) seteuid(pw->pw_uid);
1886 if (data_source.su_family == AF_INET)
1888 on = IPTOS_THROUGHPUT;
1889 if (setsockopt(s, IPPROTO_IP, IP_TOS, &on, sizeof(int)) < 0)
1890 syslog(LOG_WARNING, "data setsockopt (IP_TOS): %m");
1895 * Turn off push flag to keep sender TCP from sending short packets
1896 * at the boundaries of each write().
1899 if (setsockopt(s, IPPROTO_TCP, TCP_NOPUSH, &on, sizeof on) < 0)
1900 syslog(LOG_WARNING, "data setsockopt (TCP_NOPUSH): %m");
1902 return (fdopen(s, mode));
1904 /* Return the real value of errno (close may change it) */
1906 (void) seteuid(pw->pw_uid);
1913 dataconn(char *name, off_t size, char *mode)
1917 int retry = 0, tos, conerrno;
1922 (void) snprintf(sizebuf, sizeof(sizebuf),
1923 " (%jd bytes)", (intmax_t)size);
1927 union sockunion from;
1928 socklen_t fromlen = ctrl_addr.su_len;
1930 struct timeval timeout;
1934 FD_SET(pdata, &set);
1936 timeout.tv_usec = 0;
1937 timeout.tv_sec = 120;
1940 * Granted a socket is in the blocking I/O mode,
1941 * accept() will block after a successful select()
1942 * if the selected connection dies in between.
1943 * Therefore set the non-blocking I/O flag here.
1945 if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
1946 fcntl(pdata, F_SETFL, flags | O_NONBLOCK) == -1)
1948 if (select(pdata+1, &set, NULL, NULL, &timeout) <= 0 ||
1949 (s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0)
1951 (void) close(pdata);
1954 * Unset the inherited non-blocking I/O flag
1955 * on the child socket so stdio can work on it.
1957 if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
1958 fcntl(pdata, F_SETFL, flags & ~O_NONBLOCK) == -1)
1961 if (from.su_family == AF_INET)
1963 tos = IPTOS_THROUGHPUT;
1964 if (setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
1965 syslog(LOG_WARNING, "pdata setsockopt (IP_TOS): %m");
1968 reply(150, "Opening %s mode data connection for '%s'%s.",
1969 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
1970 return (fdopen(pdata, mode));
1972 reply(425, "Can't open data connection.");
1973 (void) close(pdata);
1978 reply(125, "Using existing data connection for '%s'%s.",
1981 return (fdopen(data, mode));
1984 data_dest = his_addr;
1987 file = getdatasock(mode);
1989 char hostbuf[NI_MAXHOST], portbuf[NI_MAXSERV];
1991 if (getnameinfo((struct sockaddr *)&data_source,
1993 hostbuf, sizeof(hostbuf) - 1,
1994 portbuf, sizeof(portbuf) - 1,
1995 NI_NUMERICHOST|NI_NUMERICSERV))
1996 *hostbuf = *portbuf = 0;
1997 hostbuf[sizeof(hostbuf) - 1] = 0;
1998 portbuf[sizeof(portbuf) - 1] = 0;
1999 reply(425, "Can't create data socket (%s,%s): %s.",
2000 hostbuf, portbuf, strerror(errno));
2003 data = fileno(file);
2005 if (connect(data, (struct sockaddr *)&data_dest,
2006 data_dest.su_len) == 0)
2009 (void) fclose(file);
2011 if (conerrno == EADDRINUSE) {
2017 } while (retry <= swaitmax);
2018 if (conerrno != 0) {
2019 reply(425, "Can't build data connection: %s.",
2020 strerror(conerrno));
2023 reply(150, "Opening %s mode data connection for '%s'%s.",
2024 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
2029 * A helper macro to avoid code duplication
2030 * in send_data() and receive_data().
2032 * XXX We have to block SIGURG during putc() because BSD stdio
2033 * is unable to restart interrupted write operations and hence
2034 * the entire buffer contents will be lost as soon as a write()
2035 * call indicates EINTR to stdio.
2037 #define FTPD_PUTC(ch, file, label) \
2043 ret = putc((ch), (file)); \
2045 CHECKOOB(return (-1)) \
2046 else if (ferror(file)) \
2049 } while (ret == EOF); \
2053 * Tranfer the contents of "instr" to "outstr" peer using the appropriate
2054 * encapsulation of the data subject to Mode, Structure, and Type.
2056 * NB: Form isn't handled.
2059 send_data(FILE *instr, FILE *outstr, size_t blksize, off_t filesize, int isreg)
2061 int c, cp, filefd, netfd;
2072 CHECKOOB(return (-1))
2073 else if (c == EOF && ferror(instr))
2076 if (ferror(instr)) { /* resume after OOB */
2080 if (feof(instr)) /* EOF */
2082 syslog(LOG_ERR, "Internal: impossible condition"
2083 " on file after getc()");
2086 if (c == '\n' && cp != '\r') {
2087 FTPD_PUTC('\r', outstr, data_err);
2090 FTPD_PUTC(c, outstr, data_err);
2094 #ifdef notyet /* BSD stdio isn't ready for that */
2095 while (fflush(outstr) == EOF) {
2096 CHECKOOB(return (-1))
2104 if (fflush(outstr) == EOF)
2107 reply(226, "Transfer complete.");
2113 * isreg is only set if we are not doing restart and we
2114 * are sending a regular file
2116 netfd = fileno(outstr);
2117 filefd = fileno(instr);
2120 char *msg = "Transfer complete.";
2126 while (filesize > 0) {
2127 err = sendfile(filefd, netfd, offset, 0,
2130 * Calculate byte_count before OOB processing.
2131 * It can be used in myoob() later.
2136 CHECKOOB(return (-1))
2137 else if (err == -1) {
2138 if (errno != EINTR &&
2139 cnt == 0 && offset == 0)
2143 if (err == -1) /* resume after OOB */
2146 * We hit the EOF prematurely.
2147 * Perhaps the file was externally truncated.
2150 msg = "Transfer finished due to "
2151 "premature end of file.";
2156 reply(226, "%s", msg);
2161 if ((buf = malloc(blksize)) == NULL) {
2163 reply(451, "Ran out of memory.");
2171 cnt = read(filefd, buf, blksize);
2172 CHECKOOB(free(buf); return (-1))
2177 if (cnt < 0) /* resume after OOB */
2179 if (cnt == 0) /* EOF */
2181 for (len = cnt, bp = buf; len > 0;) {
2182 cnt = write(netfd, bp, len);
2183 CHECKOOB(free(buf); return (-1))
2197 reply(226, "Transfer complete.");
2201 reply(550, "Unimplemented TYPE %d in send_data.", type);
2207 perror_reply(426, "Data connection");
2212 perror_reply(551, "Error on input file");
2217 * Transfer data from peer to "outstr" using the appropriate encapulation of
2218 * the data subject to Mode, Structure, and Type.
2220 * N.B.: Form isn't handled.
2223 receive_data(FILE *instr, FILE *outstr)
2239 cnt = read(fileno(instr), buf, sizeof(buf));
2240 CHECKOOB(return (-1))
2243 if (cnt < 0) /* resume after OOB */
2245 if (cnt == 0) /* EOF */
2247 for (len = cnt, bp = buf; len > 0;) {
2248 cnt = write(fileno(outstr), bp, len);
2249 CHECKOOB(return (-1))
2264 reply(553, "TYPE E not implemented.");
2271 CHECKOOB(return (-1))
2272 else if (c == EOF && ferror(instr))
2274 if (c == EOF && ferror(instr)) { /* resume after OOB */
2281 FTPD_PUTC('\r', outstr, file_err);
2291 /* Check for EOF here in order not to lose last \r. */
2293 if (feof(instr)) /* EOF */
2295 syslog(LOG_ERR, "Internal: impossible condition"
2296 " on data stream after getc()");
2301 FTPD_PUTC(c, outstr, file_err);
2304 #ifdef notyet /* BSD stdio isn't ready for that */
2305 while (fflush(outstr) == EOF) {
2306 CHECKOOB(return (-1))
2314 if (fflush(outstr) == EOF)
2319 "WARNING! %d bare linefeeds received in ASCII mode.",
2321 (void)printf(" File may not have transferred correctly.\r\n");
2326 reply(550, "Unimplemented TYPE %d in receive_data.", type);
2332 perror_reply(426, "Data connection");
2337 perror_reply(452, "Error writing to file");
2342 statfilecmd(char *filename)
2347 char line[LINE_MAX];
2350 code = lstat(filename, &st) == 0 && S_ISDIR(st.st_mode) ? 212 : 213;
2351 (void)snprintf(line, sizeof(line), _PATH_LS " -lgA %s", filename);
2352 fin = ftpd_popen(line, "r");
2354 perror_reply(551, filename);
2357 lreply(code, "Status of %s:", filename);
2359 while ((c = getc(fin)) != EOF) {
2361 if (ferror(stdout)){
2362 perror_reply(421, "Control connection");
2363 (void) ftpd_pclose(fin);
2368 perror_reply(551, filename);
2369 (void) ftpd_pclose(fin);
2372 (void) putc('\r', stdout);
2375 * RFC 959 says neutral text should be prepended before
2376 * a leading 3-digit number followed by whitespace, but
2377 * many ftp clients can be confused by any leading digits,
2378 * as a matter of fact.
2380 if (atstart && isdigit(c))
2381 (void) putc(' ', stdout);
2382 (void) putc(c, stdout);
2383 atstart = (c == '\n');
2385 (void) ftpd_pclose(fin);
2386 reply(code, "End of status.");
2392 union sockunion *su;
2394 char hname[NI_MAXHOST];
2398 lreply(211, "%s FTP server status:", hostname);
2399 printf(" %s\r\n", version);
2401 lreply(211, "FTP server status:");
2402 printf(" Connected to %s", remotehost);
2403 if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
2404 hname, sizeof(hname) - 1, NULL, 0, NI_NUMERICHOST)) {
2405 hname[sizeof(hname) - 1] = 0;
2406 if (strcmp(hname, remotehost) != 0)
2407 printf(" (%s)", hname);
2412 printf(" Logged in anonymously\r\n");
2414 printf(" Logged in as %s\r\n", pw->pw_name);
2415 } else if (askpasswd)
2416 printf(" Waiting for password\r\n");
2418 printf(" Waiting for user name\r\n");
2419 printf(" TYPE: %s", typenames[type]);
2420 if (type == TYPE_A || type == TYPE_E)
2421 printf(", FORM: %s", formnames[form]);
2424 printf(" %d", CHAR_BIT);
2426 printf(" %d", bytesize); /* need definition! */
2428 printf("; STRUcture: %s; transfer MODE: %s\r\n",
2429 strunames[stru], modenames[mode]);
2431 printf(" Data connection open\r\n");
2432 else if (pdata != -1) {
2436 } else if (usedefault == 0) {
2440 #define UC(b) (((int) b) & 0xff)
2442 printf(" EPSV only mode (EPSV ALL)\r\n");
2447 if (su->su_family == AF_INET) {
2448 a = (u_char *) &su->su_sin.sin_addr;
2449 p = (u_char *) &su->su_sin.sin_port;
2450 printf(" %s (%d,%d,%d,%d,%d,%d)\r\n",
2451 ispassive ? "PASV" : "PORT",
2452 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
2453 UC(p[0]), UC(p[1]));
2460 switch (su->su_family) {
2462 a = (u_char *) &su->su_sin.sin_addr;
2463 p = (u_char *) &su->su_sin.sin_port;
2464 alen = sizeof(su->su_sin.sin_addr);
2468 a = (u_char *) &su->su_sin6.sin6_addr;
2469 p = (u_char *) &su->su_sin6.sin6_port;
2470 alen = sizeof(su->su_sin6.sin6_addr);
2478 printf(" %s (%d,%d,", ispassive ? "LPSV" : "LPRT",
2480 for (i = 0; i < alen; i++)
2481 printf("%d,", UC(a[i]));
2482 printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1]));
2491 switch (su->su_family) {
2503 union sockunion tmp;
2506 if (tmp.su_family == AF_INET6)
2507 tmp.su_sin6.sin6_scope_id = 0;
2508 if (!getnameinfo((struct sockaddr *)&tmp, tmp.su_len,
2509 hname, sizeof(hname) - 1, NULL, 0,
2511 hname[sizeof(hname) - 1] = 0;
2512 printf(" %s |%d|%s|%d|\r\n",
2513 ispassive ? "EPSV" : "EPRT",
2514 af, hname, htons(tmp.su_port));
2520 printf(" No data connection\r\n");
2521 reply(211, "End of status.");
2528 reply(451, "Error in server: %s", s);
2529 reply(221, "Closing connection due to server error.");
2535 reply(int n, const char *fmt, ...)
2539 (void)printf("%d ", n);
2541 (void)vprintf(fmt, ap);
2543 (void)printf("\r\n");
2544 (void)fflush(stdout);
2546 syslog(LOG_DEBUG, "<--- %d ", n);
2548 vsyslog(LOG_DEBUG, fmt, ap);
2554 lreply(int n, const char *fmt, ...)
2558 (void)printf("%d- ", n);
2560 (void)vprintf(fmt, ap);
2562 (void)printf("\r\n");
2563 (void)fflush(stdout);
2565 syslog(LOG_DEBUG, "<--- %d- ", n);
2567 vsyslog(LOG_DEBUG, fmt, ap);
2576 reply(250, "%s command successful.", s);
2583 reply(502, "%s command not implemented.", s);
2592 if ((cp = strchr(cbuf,'\n')))
2594 reply(500, "%s: command not understood.", cbuf);
2602 LOGCMD("delete", name);
2603 if (lstat(name, &st) < 0) {
2604 perror_reply(550, name);
2607 if (S_ISDIR(st.st_mode)) {
2608 if (rmdir(name) < 0) {
2609 perror_reply(550, name);
2614 if (guest && noguestmod) {
2615 reply(550, "Operation not permitted.");
2618 if (unlink(name) < 0) {
2619 perror_reply(550, name);
2630 if (chdir(path) < 0)
2631 perror_reply(550, path);
2641 LOGCMD("mkdir", name);
2642 if (guest && noguestmkd)
2643 reply(550, "Operation not permitted.");
2644 else if (mkdir(name, 0777) < 0)
2645 perror_reply(550, name);
2647 if ((s = doublequote(name)) == NULL)
2648 fatalerror("Ran out of memory.");
2649 reply(257, "\"%s\" directory created.", s);
2655 removedir(char *name)
2658 LOGCMD("rmdir", name);
2659 if (rmdir(name) < 0)
2660 perror_reply(550, name);
2668 char *s, path[MAXPATHLEN + 1];
2670 if (getcwd(path, sizeof(path)) == NULL)
2671 perror_reply(550, "Get current directory");
2673 if ((s = doublequote(path)) == NULL)
2674 fatalerror("Ran out of memory.");
2675 reply(257, "\"%s\" is current directory.", s);
2681 renamefrom(char *name)
2685 if (guest && noguestmod) {
2686 reply(550, "Operation not permitted.");
2689 if (lstat(name, &st) < 0) {
2690 perror_reply(550, name);
2693 reply(350, "File exists, ready for destination name.");
2698 renamecmd(char *from, char *to)
2702 LOGCMD2("rename", from, to);
2704 if (guest && (stat(to, &st) == 0)) {
2705 reply(550, "%s: permission denied.", to);
2709 if (rename(from, to) < 0)
2710 perror_reply(550, "rename");
2716 dolog(struct sockaddr *who)
2718 char who_name[NI_MAXHOST];
2720 realhostname_sa(remotehost, sizeof(remotehost) - 1, who, who->sa_len);
2721 remotehost[sizeof(remotehost) - 1] = 0;
2722 if (getnameinfo(who, who->sa_len,
2723 who_name, sizeof(who_name) - 1, NULL, 0, NI_NUMERICHOST))
2725 who_name[sizeof(who_name) - 1] = 0;
2728 #ifdef VIRTUAL_HOSTING
2729 if (thishost != firsthost)
2730 snprintf(proctitle, sizeof(proctitle), "%s: connected (to %s)",
2731 remotehost, hostname);
2734 snprintf(proctitle, sizeof(proctitle), "%s: connected",
2736 setproctitle("%s", proctitle);
2737 #endif /* SETPROCTITLE */
2740 #ifdef VIRTUAL_HOSTING
2741 if (thishost != firsthost)
2742 syslog(LOG_INFO, "connection from %s (%s) to %s",
2743 remotehost, who_name, hostname);
2746 syslog(LOG_INFO, "connection from %s (%s)",
2747 remotehost, who_name);
2752 * Record logout in wtmp file
2753 * and exit with supplied status.
2756 dologout(int status)
2759 if (logged_in && dowtmp) {
2761 ftpd_logwtmp(wtmpid, NULL, NULL);
2763 /* beware of flushing buffers after a SIGPIPE */
2781 syslog(LOG_ERR, "Internal: maskurg() while no transfer");
2786 sigaddset(&sset, SIGURG);
2787 sigprocmask(flag ? SIG_BLOCK : SIG_UNBLOCK, &sset, NULL);
2797 syslog(LOG_ERR, "Internal: flagxfer(1): "
2798 "transfer already under way");
2804 syslog(LOG_ERR, "Internal: flagxfer(0): "
2805 "no active transfer");
2812 * Returns 0 if OK to resume or -1 if abort requested.
2821 syslog(LOG_ERR, "Internal: myoob() while no transfer");
2825 ret = getline(cp, 7, stdin);
2827 reply(221, "You could at least say goodbye.");
2829 } else if (ret == -2) {
2830 /* Ignore truncated command. */
2834 if (strcmp(cp, "ABOR\r\n") == 0) {
2836 reply(426, "Transfer aborted. Data connection closed.");
2837 reply(226, "Abort successful.");
2840 if (strcmp(cp, "STAT\r\n") == 0) {
2842 if (file_size != -1)
2843 reply(213, "Status: %jd of %jd bytes transferred.",
2844 (intmax_t)byte_count, (intmax_t)file_size);
2846 reply(213, "Status: %jd bytes transferred.",
2847 (intmax_t)byte_count);
2853 * Note: a response of 425 is not mentioned as a possible response to
2854 * the PASV command in RFC959. However, it has been blessed as
2855 * a legitimate response by Jon Postel in a telephone conversation
2856 * with Rick Adams on 25 Jan 89.
2865 if (pdata >= 0) /* close old port if one set */
2868 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2870 perror_reply(425, "Can't open passive connection");
2874 if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
2875 syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
2880 if (ctrl_addr.su_family == AF_INET) {
2881 on = restricted_data_ports ? IP_PORTRANGE_HIGH
2882 : IP_PORTRANGE_DEFAULT;
2884 if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
2885 &on, sizeof(on)) < 0)
2889 #ifdef IPV6_PORTRANGE
2890 if (ctrl_addr.su_family == AF_INET6) {
2891 on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
2892 : IPV6_PORTRANGE_DEFAULT;
2894 if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
2895 &on, sizeof(on)) < 0)
2900 pasv_addr = ctrl_addr;
2901 pasv_addr.su_port = 0;
2902 if (bind(pdata, (struct sockaddr *)&pasv_addr, pasv_addr.su_len) < 0)
2905 (void) seteuid(pw->pw_uid);
2907 len = sizeof(pasv_addr);
2908 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
2910 if (listen(pdata, 1) < 0)
2912 if (pasv_addr.su_family == AF_INET)
2913 a = (char *) &pasv_addr.su_sin.sin_addr;
2914 else if (pasv_addr.su_family == AF_INET6 &&
2915 IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr))
2916 a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
2920 p = (char *) &pasv_addr.su_port;
2922 #define UC(b) (((int) b) & 0xff)
2924 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
2925 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
2929 (void) seteuid(pw->pw_uid);
2930 (void) close(pdata);
2932 perror_reply(425, "Can't open passive connection");
2937 * Long Passive defined in RFC 1639.
2938 * 228 Entering Long Passive Mode
2939 * (af, hal, h1, h2, h3,..., pal, p1, p2...)
2943 long_passive(char *cmd, int pf)
2949 if (pdata >= 0) /* close old port if one set */
2952 if (pf != PF_UNSPEC) {
2953 if (ctrl_addr.su_family != pf) {
2954 switch (ctrl_addr.su_family) {
2967 * only EPRT/EPSV ready clients will understand this
2969 if (strcmp(cmd, "EPSV") == 0 && pf) {
2970 reply(522, "Network protocol mismatch, "
2973 reply(501, "Network protocol mismatch."); /*XXX*/
2979 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2981 perror_reply(425, "Can't open passive connection");
2985 if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
2986 syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
2990 pasv_addr = ctrl_addr;
2991 pasv_addr.su_port = 0;
2992 len = pasv_addr.su_len;
2995 if (ctrl_addr.su_family == AF_INET) {
2996 on = restricted_data_ports ? IP_PORTRANGE_HIGH
2997 : IP_PORTRANGE_DEFAULT;
2999 if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
3000 &on, sizeof(on)) < 0)
3004 #ifdef IPV6_PORTRANGE
3005 if (ctrl_addr.su_family == AF_INET6) {
3006 on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
3007 : IPV6_PORTRANGE_DEFAULT;
3009 if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
3010 &on, sizeof(on)) < 0)
3015 if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0)
3018 (void) seteuid(pw->pw_uid);
3020 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
3022 if (listen(pdata, 1) < 0)
3025 #define UC(b) (((int) b) & 0xff)
3027 if (strcmp(cmd, "LPSV") == 0) {
3028 p = (char *)&pasv_addr.su_port;
3029 switch (pasv_addr.su_family) {
3031 a = (char *) &pasv_addr.su_sin.sin_addr;
3034 "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)",
3035 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
3036 2, UC(p[0]), UC(p[1]));
3039 if (IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr)) {
3040 a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
3043 a = (char *) &pasv_addr.su_sin6.sin6_addr;
3045 "Entering Long Passive Mode "
3046 "(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)",
3047 6, 16, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
3048 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]),
3049 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]),
3050 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]),
3051 2, UC(p[0]), UC(p[1]));
3054 } else if (strcmp(cmd, "EPSV") == 0) {
3055 switch (pasv_addr.su_family) {
3058 reply(229, "Entering Extended Passive Mode (|||%d|)",
3059 ntohs(pasv_addr.su_port));
3063 /* more proper error code? */
3067 (void) seteuid(pw->pw_uid);
3068 (void) close(pdata);
3070 perror_reply(425, "Can't open passive connection");
3075 * Generate unique name for file with basename "local"
3076 * and open the file in order to avoid possible races.
3077 * Try "local" first, then "local.1", "local.2" etc, up to "local.99".
3078 * Return descriptor to the file, set "name" to its name.
3080 * Generates failure reply on error.
3083 guniquefd(char *local, char **name)
3085 static char new[MAXPATHLEN];
3091 cp = strrchr(local, '/');
3094 if (stat(cp ? local : ".", &st) < 0) {
3095 perror_reply(553, cp ? local : ".");
3100 * Let not overwrite dirname with counter suffix.
3102 * In this extreme case dot won't be put in front of suffix.
3104 if (strlen(local) > sizeof(new) - 4) {
3105 reply(553, "Pathname too long.");
3110 /* -4 is for the .nn<null> we put on the end below */
3111 (void) snprintf(new, sizeof(new) - 4, "%s", local);
3112 cp = new + strlen(new);
3114 * Don't generate dotfile unless requested explicitly.
3115 * This covers the case when basename gets truncated off
3118 if (cp > new && cp[-1] != '/')
3120 for (count = 0; count < 100; count++) {
3121 /* At count 0 try unmodified name */
3123 (void)sprintf(cp, "%d", count);
3124 if ((fd = open(count ? new : local,
3125 O_RDWR | O_CREAT | O_EXCL, 0666)) >= 0) {
3126 *name = count ? new : local;
3129 if (errno != EEXIST) {
3130 perror_reply(553, count ? new : local);
3134 reply(452, "Unique file name cannot be created.");
3139 * Format and send reply containing system error number.
3142 perror_reply(int code, char *string)
3145 reply(code, "%s: %s.", string, strerror(errno));
3148 static char *onefile[] = {
3154 send_file_list(char *whichf)
3160 char **dirlist, *dirname;
3165 if (strpbrk(whichf, "~{[*?") != NULL) {
3166 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
3168 memset(&gl, 0, sizeof(gl));
3169 gl.gl_matchc = MAXGLOBARGS;
3170 flags |= GLOB_LIMIT;
3172 if (glob(whichf, flags, 0, &gl)) {
3173 reply(550, "No matching files found.");
3175 } else if (gl.gl_pathc == 0) {
3177 perror_reply(550, whichf);
3180 dirlist = gl.gl_pathv;
3182 onefile[0] = whichf;
3187 while ((dirname = *dirlist++)) {
3188 if (stat(dirname, &st) < 0) {
3190 * If user typed "ls -l", etc, and the client
3191 * used NLST, do what the user meant.
3193 if (dirname[0] == '-' && *dirlist == NULL &&
3195 retrieve(_PATH_LS " %s", dirname);
3197 perror_reply(550, whichf);
3201 if (S_ISREG(st.st_mode)) {
3203 dout = dataconn("file list", -1, "w");
3209 fprintf(dout, "%s%s\n", dirname,
3210 type == TYPE_A ? "\r" : "");
3214 byte_count += strlen(dirname) +
3215 (type == TYPE_A ? 2 : 1);
3216 CHECKOOB(goto abrt);
3218 } else if (!S_ISDIR(st.st_mode))
3221 if ((dirp = opendir(dirname)) == NULL)
3224 while ((dir = readdir(dirp)) != NULL) {
3225 char nbuf[MAXPATHLEN];
3227 CHECKOOB(goto abrt);
3229 if (dir->d_name[0] == '.' && dir->d_namlen == 1)
3231 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' &&
3235 snprintf(nbuf, sizeof(nbuf),
3236 "%s/%s", dirname, dir->d_name);
3239 * We have to do a stat to insure it's
3240 * not a directory or special file.
3242 if (simple || (stat(nbuf, &st) == 0 &&
3243 S_ISREG(st.st_mode))) {
3245 dout = dataconn("file list", -1, "w");
3251 if (nbuf[0] == '.' && nbuf[1] == '/')
3252 fprintf(dout, "%s%s\n", &nbuf[2],
3253 type == TYPE_A ? "\r" : "");
3255 fprintf(dout, "%s%s\n", nbuf,
3256 type == TYPE_A ? "\r" : "");
3260 byte_count += strlen(nbuf) +
3261 (type == TYPE_A ? 2 : 1);
3262 CHECKOOB(goto abrt);
3265 (void) closedir(dirp);
3270 reply(550, "No files found.");
3271 else if (ferror(dout))
3272 data_err: perror_reply(550, "Data connection");
3274 reply(226, "Transfer complete.");
3279 (void) fclose(dout);
3284 (void) closedir(dirp);
3292 reapchild(int signo)
3294 while (waitpid(-1, NULL, WNOHANG) > 0);
3297 #ifdef OLD_SETPROCTITLE
3299 * Clobber argv so ps will show what we're doing. (Stolen from sendmail.)
3300 * Warning, since this is usually started from inetd.conf, it often doesn't
3301 * have much of an environment or arglist to overwrite.
3304 setproctitle(const char *fmt, ...)
3312 (void)vsnprintf(buf, sizeof(buf), fmt, ap);
3314 /* make ps print our process name */
3319 if (i > LastArgv - p - 2) {
3320 i = LastArgv - p - 2;
3325 if (ch != '\n' && ch != '\r')
3327 while (p < LastArgv)
3330 #endif /* OLD_SETPROCTITLE */
3333 appendf(char **strp, char *fmt, ...)
3339 vasprintf(&p, fmt, ap);
3342 fatalerror("Ran out of memory.");
3347 asprintf(strp, "%s%s", ostr, p);
3349 fatalerror("Ran out of memory.");
3355 logcmd(char *cmd, char *file1, char *file2, off_t cnt)
3358 char wd[MAXPATHLEN + 1];
3363 if (getcwd(wd, sizeof(wd) - 1) == NULL)
3364 strcpy(wd, strerror(errno));
3366 appendf(&msg, "%s", cmd);
3368 appendf(&msg, " %s", file1);
3370 appendf(&msg, " %s", file2);
3372 appendf(&msg, " = %jd bytes", (intmax_t)cnt);
3373 appendf(&msg, " (wd: %s", wd);
3374 if (guest || dochroot)
3375 appendf(&msg, "; chrooted");
3377 syslog(LOG_INFO, "%s", msg);
3382 logxfer(char *name, off_t size, time_t start)
3384 char buf[MAXPATHLEN + 1024];
3385 char path[MAXPATHLEN + 1];
3390 if (realpath(name, path) == NULL) {
3391 syslog(LOG_NOTICE, "realpath failed on %s: %m", path);
3394 snprintf(buf, sizeof(buf), "%.20s!%s!%s!%s!%jd!%ld\n",
3395 ctime(&now)+4, ident, remotehost,
3396 path, (intmax_t)size,
3397 (long)(now - start + (now == start)));
3398 write(statfd, buf, strlen(buf));
3403 doublequote(char *s)
3408 for (p = s, n = 0; *p; p++)
3412 if ((s2 = malloc(p - s + n + 1)) == NULL)
3415 for (p = s2; *s; s++, p++) {
3416 if ((*p = *s) == '"')
3424 /* setup server socket for specified address family */
3425 /* if af is PF_UNSPEC more than one socket may be returned */
3426 /* the returned list is dynamically allocated, so caller needs to free it */
3428 socksetup(int af, char *bindname, const char *bindport)
3430 struct addrinfo hints, *res, *r;
3431 int error, maxs, *s, *socks;
3434 memset(&hints, 0, sizeof(hints));
3435 hints.ai_flags = AI_PASSIVE;
3436 hints.ai_family = af;
3437 hints.ai_socktype = SOCK_STREAM;
3438 error = getaddrinfo(bindname, bindport, &hints, &res);
3440 syslog(LOG_ERR, "%s", gai_strerror(error));
3441 if (error == EAI_SYSTEM)
3442 syslog(LOG_ERR, "%s", strerror(errno));
3446 /* Count max number of sockets we may open */
3447 for (maxs = 0, r = res; r; r = r->ai_next, maxs++)
3449 socks = malloc((maxs + 1) * sizeof(int));
3452 syslog(LOG_ERR, "couldn't allocate memory for sockets");
3456 *socks = 0; /* num of sockets counter at start of array */
3458 for (r = res; r; r = r->ai_next) {
3459 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
3461 syslog(LOG_DEBUG, "control socket: %m");
3464 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
3465 &on, sizeof(on)) < 0)
3467 "control setsockopt (SO_REUSEADDR): %m");
3468 if (r->ai_family == AF_INET6) {
3469 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
3470 &on, sizeof(on)) < 0)
3472 "control setsockopt (IPV6_V6ONLY): %m");
3474 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
3475 syslog(LOG_DEBUG, "control bind: %m");
3487 syslog(LOG_ERR, "control socket: Couldn't bind to any socket");