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 extern off_t restart_point;
111 union sockunion ctrl_addr;
112 union sockunion data_source;
113 union sockunion data_dest;
114 union sockunion his_addr;
115 union sockunion pasv_addr;
120 int hostinfo = 1; /* print host-specific info in messages */
125 int timeout = 900; /* timeout after 15 minutes of inactivity */
126 int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
128 int restricted_data_ports = 1;
129 int paranoid = 1; /* be extra careful about security */
130 int anon_only = 0; /* Only anonymous ftp allowed */
131 int assumeutf8 = 0; /* Assume that server file names are in UTF-8 */
140 int stru; /* avoid C keyword */
142 int usedefault = 1; /* for data transfers */
143 int pdata = -1; /* for passive mode */
144 int readonly = 0; /* Server is in readonly mode. */
145 int noepsv = 0; /* EPSV command is disabled. */
146 int noretr = 0; /* RETR command is disabled. */
147 int noguestretr = 0; /* RETR command is disabled for anon users. */
148 int noguestmkd = 0; /* MKD command is disabled for anon users. */
149 int noguestmod = 1; /* anon users may not modify existing files. */
153 #if !defined(CMASK) || CMASK == 0
157 int defumask = CMASK; /* default umask value */
162 #ifdef VIRTUAL_HOSTING
165 static struct ftphost {
166 struct ftphost *next;
167 struct addrinfo *hostinfo;
173 } *thishost, *firsthost;
176 char remotehost[NI_MAXHOST];
179 static char ttyline[20];
180 char *tty = ttyline; /* for klogin */
183 static int auth_pam(struct passwd**, const char*);
184 pam_handle_t *pamh = NULL;
187 static struct opie opiedata;
188 static char opieprompt[OPIE_CHALLENGE_MAX+1];
191 char *pid_file = NULL; /* means default location to pidfile(3) */
194 * Limit number of pathnames that glob can return.
195 * A limit of 0 indicates the number of pathnames is unlimited.
197 #define MAXGLOBARGS 16384
201 * Timeout intervals for retrying connections
202 * to hosts that don't accept PORT cmds. This
203 * is a kludge, but given the problems with TCP...
205 #define SWAITMAX 90 /* wait at most 90 seconds */
206 #define SWAITINT 5 /* interval between retries */
208 int swaitmax = SWAITMAX;
209 int swaitint = SWAITINT;
212 #ifdef OLD_SETPROCTITLE
213 char **Argv = NULL; /* pointer to argument vector */
214 char *LastArgv = NULL; /* end of argv */
215 #endif /* OLD_SETPROCTITLE */
216 char proctitle[LINE_MAX]; /* initial part of title */
217 #endif /* SETPROCTITLE */
219 #define LOGCMD(cmd, file) logcmd((cmd), (file), NULL, -1)
220 #define LOGCMD2(cmd, file1, file2) logcmd((cmd), (file1), (file2), -1)
221 #define LOGBYTES(cmd, file, cnt) logcmd((cmd), (file), NULL, (cnt))
223 static volatile sig_atomic_t recvurg;
224 static int transflag; /* NB: for debugging only */
226 #define STARTXFER flagxfer(1)
227 #define ENDXFER flagxfer(0)
229 #define START_UNSAFE maskurg(1)
230 #define END_UNSAFE maskurg(0)
232 /* It's OK to put an `else' clause after this macro. */
233 #define CHECKOOB(action) \
242 #ifdef VIRTUAL_HOSTING
243 static void inithosts(int);
244 static void selecthost(union sockunion *);
246 static void ack(char *);
247 static void sigurg(int);
248 static void maskurg(int);
249 static void flagxfer(int);
250 static int myoob(void);
251 static int checkuser(char *, char *, int, char **);
252 static FILE *dataconn(char *, off_t, char *);
253 static void dolog(struct sockaddr *);
254 static void end_login(void);
255 static FILE *getdatasock(char *);
256 static int guniquefd(char *, char **);
257 static void lostconn(int);
258 static void sigquit(int);
259 static int receive_data(FILE *, FILE *);
260 static int send_data(FILE *, FILE *, size_t, off_t, int);
261 static struct passwd *
263 static char *sgetsave(char *);
264 static void reapchild(int);
265 static void appendf(char **, char *, ...) __printflike(2, 3);
266 static void logcmd(char *, char *, char *, off_t);
267 static void logxfer(char *, off_t, time_t);
268 static char *doublequote(char *);
269 static int *socksetup(int, char *, const char *);
272 main(int argc, char *argv[], char **envp)
276 char *cp, line[LINE_MAX];
278 char *bindname = NULL;
279 const char *bindport = "ftp";
280 int family = AF_UNSPEC;
283 tzset(); /* in case no timezone database in ~ftp */
284 sigemptyset(&sa.sa_mask);
285 sa.sa_flags = SA_RESTART;
287 #ifdef OLD_SETPROCTITLE
289 * Save start and extent of argv for setproctitle.
294 LastArgv = envp[-1] + strlen(envp[-1]);
295 #endif /* OLD_SETPROCTITLE */
298 * Prevent diagnostic messages from appearing on stderr.
299 * We run as a daemon or from inetd; in both cases, there's
300 * more reason in logging to syslog.
302 (void) freopen(_PATH_DEVNULL, "w", stderr);
306 * LOG_NDELAY sets up the logging connection immediately,
307 * necessary for anonymous ftp's that chroot and can't do it later.
309 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
311 while ((ch = getopt(argc, argv,
312 "468a:AdDEhlmMoOp:P:rRSt:T:u:UvW")) != -1) {
315 family = (family == AF_INET6) ? AF_UNSPEC : AF_INET;
319 family = (family == AF_INET) ? AF_UNSPEC : AF_INET6;
351 logging++; /* > 1 == extra logging */
391 timeout = atoi(optarg);
392 if (maxtimeout < timeout)
393 maxtimeout = timeout;
397 maxtimeout = atoi(optarg);
398 if (timeout > maxtimeout)
399 timeout = maxtimeout;
406 val = strtol(optarg, &optarg, 8);
407 if (*optarg != '\0' || val < 0)
408 syslog(LOG_WARNING, "bad value for -u");
414 restricted_data_ports = 0;
426 syslog(LOG_WARNING, "unknown flag -%c ignored", optopt);
432 int *ctl_sock, fd, maxfd = -1, nfds, i;
433 fd_set defreadfds, readfds;
437 if ((pfh = pidfile_open(pid_file, 0600, &pid)) == NULL) {
438 if (errno == EEXIST) {
439 syslog(LOG_ERR, "%s already running, pid %d",
440 getprogname(), (int)pid);
443 syslog(LOG_WARNING, "pidfile_open: %m");
447 * Detach from parent.
449 if (daemon(1, 1) < 0) {
450 syslog(LOG_ERR, "failed to become a daemon");
454 if (pfh != NULL && pidfile_write(pfh) == -1)
455 syslog(LOG_WARNING, "pidfile_write: %m");
457 sa.sa_handler = reapchild;
458 (void)sigaction(SIGCHLD, &sa, NULL);
460 #ifdef VIRTUAL_HOSTING
465 * Open a socket, bind it to the FTP port, and start
468 ctl_sock = socksetup(family, bindname, bindport);
469 if (ctl_sock == NULL)
472 FD_ZERO(&defreadfds);
473 for (i = 1; i <= *ctl_sock; i++) {
474 FD_SET(ctl_sock[i], &defreadfds);
475 if (listen(ctl_sock[i], 32) < 0) {
476 syslog(LOG_ERR, "control listen: %m");
479 if (maxfd < ctl_sock[i])
484 * Loop forever accepting connection requests and forking off
485 * children to handle them.
488 FD_COPY(&defreadfds, &readfds);
489 nfds = select(maxfd + 1, &readfds, NULL, NULL, 0);
491 if (nfds < 0 && errno != EINTR)
492 syslog(LOG_WARNING, "select: %m");
497 for (i = 1; i <= *ctl_sock; i++)
498 if (FD_ISSET(ctl_sock[i], &readfds)) {
499 addrlen = sizeof(his_addr);
500 fd = accept(ctl_sock[i],
501 (struct sockaddr *)&his_addr,
508 switch (pid = fork()) {
514 for (i = 1; i <= *ctl_sock; i++)
520 syslog(LOG_WARNING, "fork: %m");
528 addrlen = sizeof(his_addr);
529 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
530 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
534 #ifdef VIRTUAL_HOSTING
535 if (his_addr.su_family == AF_INET6 &&
536 IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr))
539 family = his_addr.su_family;
545 sa.sa_handler = SIG_DFL;
546 (void)sigaction(SIGCHLD, &sa, NULL);
548 sa.sa_handler = sigurg;
549 sa.sa_flags = 0; /* don't restart syscalls for SIGURG */
550 (void)sigaction(SIGURG, &sa, NULL);
552 sigfillset(&sa.sa_mask); /* block all signals in handler */
553 sa.sa_flags = SA_RESTART;
554 sa.sa_handler = sigquit;
555 (void)sigaction(SIGHUP, &sa, NULL);
556 (void)sigaction(SIGINT, &sa, NULL);
557 (void)sigaction(SIGQUIT, &sa, NULL);
558 (void)sigaction(SIGTERM, &sa, NULL);
560 sa.sa_handler = lostconn;
561 (void)sigaction(SIGPIPE, &sa, NULL);
563 addrlen = sizeof(ctrl_addr);
564 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
565 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
568 dataport = ntohs(ctrl_addr.su_port) - 1; /* as per RFC 959 */
569 #ifdef VIRTUAL_HOSTING
570 /* select our identity from virtual host table */
571 selecthost(&ctrl_addr);
574 if (ctrl_addr.su_family == AF_INET)
576 tos = IPTOS_LOWDELAY;
577 if (setsockopt(0, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
578 syslog(LOG_WARNING, "control setsockopt (IP_TOS): %m");
582 * Disable Nagle on the control channel so that we don't have to wait
583 * for peer's ACK before issuing our next reply.
585 if (setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
586 syslog(LOG_WARNING, "control setsockopt (TCP_NODELAY): %m");
588 data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1);
590 /* set this here so klogin can use it... */
591 (void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid());
593 /* Try to handle urgent data inline */
595 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on)) < 0)
596 syslog(LOG_WARNING, "control setsockopt (SO_OOBINLINE): %m");
600 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
601 syslog(LOG_ERR, "fcntl F_SETOWN: %m");
603 dolog((struct sockaddr *)&his_addr);
605 * Set up default state
614 /* If logins are disabled, print out the message. */
615 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
616 while (fgets(line, sizeof(line), fd) != NULL) {
617 if ((cp = strchr(line, '\n')) != NULL)
619 lreply(530, "%s", line);
621 (void) fflush(stdout);
623 reply(530, "System not available.");
626 #ifdef VIRTUAL_HOSTING
627 fd = fopen(thishost->welcome, "r");
629 fd = fopen(_PATH_FTPWELCOME, "r");
632 while (fgets(line, sizeof(line), fd) != NULL) {
633 if ((cp = strchr(line, '\n')) != NULL)
635 lreply(220, "%s", line);
637 (void) fflush(stdout);
639 /* reply(220,) must follow */
641 #ifndef VIRTUAL_HOSTING
642 if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
643 fatalerror("Ran out of memory.");
644 if (gethostname(hostname, MAXHOSTNAMELEN - 1) < 0)
646 hostname[MAXHOSTNAMELEN - 1] = '\0';
649 reply(220, "%s FTP server (%s) ready.", hostname, version);
651 reply(220, "FTP server ready.");
662 syslog(LOG_DEBUG, "lost connection");
670 syslog(LOG_ERR, "got signal %d", signo);
674 #ifdef VIRTUAL_HOSTING
676 * read in virtual host tables (if they exist)
680 inithosts(int family)
685 char *cp, *mp, *line;
687 char *vhost, *anonuser, *statfile, *welcome, *loginmsg;
688 struct ftphost *hrp, *lhrp;
689 struct addrinfo hints, *res, *ai;
692 * Fill in the default host information
694 if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
695 fatalerror("Ran out of memory.");
696 if (gethostname(hostname, MAXHOSTNAMELEN - 1) < 0)
698 hostname[MAXHOSTNAMELEN - 1] = '\0';
699 if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
700 fatalerror("Ran out of memory.");
701 hrp->hostname = hostname;
702 hrp->hostinfo = NULL;
704 memset(&hints, 0, sizeof(hints));
705 hints.ai_flags = AI_PASSIVE;
706 hints.ai_family = family;
707 hints.ai_socktype = SOCK_STREAM;
708 if (getaddrinfo(hrp->hostname, NULL, &hints, &res) == 0)
710 hrp->statfile = _PATH_FTPDSTATFILE;
711 hrp->welcome = _PATH_FTPWELCOME;
712 hrp->loginmsg = _PATH_FTPLOGINMESG;
713 hrp->anonuser = "ftp";
715 thishost = firsthost = lhrp = hrp;
716 if ((fp = fopen(_PATH_FTPHOSTS, "r")) != NULL) {
717 int addrsize, gothost;
721 while ((line = fgetln(fp, &len)) != NULL) {
727 if (line[len - 1] == '\n') {
728 line[len - 1] = '\0';
731 if ((mp = malloc(len + 1)) == NULL)
732 fatalerror("Ran out of memory.");
733 memcpy(mp, line, len);
737 cp = strtok(line, " \t");
738 /* skip empty lines */
745 statfile = _PATH_FTPDSTATFILE;
746 welcome = _PATH_FTPWELCOME;
747 loginmsg = _PATH_FTPLOGINMESG;
750 * Preparse the line so we can use its info
751 * for all the addresses associated with
752 * the virtual host name.
753 * Field 0, the virtual host name, is special:
754 * it's already parsed off and will be strdup'ed
755 * later, after we know its canonical form.
757 for (i = 1; i < 5 && (cp = strtok(NULL, " \t")); i++)
758 if (*cp != '-' && (cp = strdup(cp)))
760 case 1: /* anon user permissions */
763 case 2: /* statistics file */
766 case 3: /* welcome message */
769 case 4: /* login message */
772 default: /* programming error */
777 hints.ai_flags = AI_PASSIVE;
778 hints.ai_family = family;
779 hints.ai_socktype = SOCK_STREAM;
780 if (getaddrinfo(vhost, NULL, &hints, &res) != 0)
782 for (ai = res; ai != NULL && ai->ai_addr != NULL;
786 for (hrp = firsthost; hrp != NULL; hrp = hrp->next) {
789 for (hi = hrp->hostinfo; hi != NULL;
791 if (hi->ai_addrlen == ai->ai_addrlen &&
794 ai->ai_addr->sa_len) == 0) {
802 if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
804 hrp->hostname = NULL;
807 if (hrp->hostinfo && hrp->hostinfo != res)
808 freeaddrinfo(hrp->hostinfo);
809 insert = 0; /* host already in the chain */
814 * determine hostname to use.
815 * force defined name if there is a valid alias
816 * otherwise fallback to primary hostname
818 /* XXX: getaddrinfo() can't do alias check */
819 switch(hrp->hostinfo->ai_family) {
821 addr = &((struct sockaddr_in *)hrp->hostinfo->ai_addr)->sin_addr;
822 addrsize = sizeof(struct in_addr);
825 addr = &((struct sockaddr_in6 *)hrp->hostinfo->ai_addr)->sin6_addr;
826 addrsize = sizeof(struct in6_addr);
829 /* should not reach here */
830 freeaddrinfo(hrp->hostinfo);
832 free(hrp); /*not in chain, can free*/
834 hrp->hostinfo = NULL; /*mark as blank*/
838 if ((hp = getipnodebyaddr(addr, addrsize,
839 hrp->hostinfo->ai_family,
840 &hp_error)) != NULL) {
841 if (strcmp(vhost, hp->h_name) != 0) {
842 if (hp->h_aliases == NULL)
846 while (hp->h_aliases[i] &&
847 strcmp(vhost, hp->h_aliases[i]) != 0)
849 if (hp->h_aliases[i] == NULL)
855 strcmp(hrp->hostname, vhost) != 0) {
857 hrp->hostname = NULL;
859 if (hrp->hostname == NULL &&
860 (hrp->hostname = strdup(vhost)) == NULL) {
861 freeaddrinfo(hrp->hostinfo);
862 hrp->hostinfo = NULL; /* mark as blank */
867 hrp->anonuser = anonuser;
868 hrp->statfile = statfile;
869 hrp->welcome = welcome;
870 hrp->loginmsg = loginmsg;
888 selecthost(union sockunion *su)
893 struct in6_addr *mapped_in6 = NULL;
899 * XXX IPv4 mapped IPv6 addr consideraton,
900 * specified in rfc2373.
902 if (su->su_family == AF_INET6 &&
903 IN6_IS_ADDR_V4MAPPED(&su->su_sin6.sin6_addr))
904 mapped_in6 = &su->su_sin6.sin6_addr;
907 hrp = thishost = firsthost; /* default */
910 while (hrp != NULL) {
911 for (hi = hrp->hostinfo; hi != NULL; hi = hi->ai_next) {
912 if (memcmp(su, hi->ai_addr, hi->ai_addrlen) == 0) {
917 /* XXX IPv4 mapped IPv6 addr consideraton */
918 if (hi->ai_addr->sa_family == AF_INET && mapped_in6 != NULL &&
919 (memcmp(&mapped_in6->s6_addr[12],
920 &((struct sockaddr_in *)hi->ai_addr)->sin_addr,
921 sizeof(struct in_addr)) == 0)) {
931 /* setup static variables as appropriate */
932 hostname = thishost->hostname;
933 ftpuser = thishost->anonuser;
938 * Helper function for sgetpwnam().
943 char *new = malloc(strlen(s) + 1);
946 reply(421, "Ran out of memory.");
950 (void) strcpy(new, s);
955 * Save the result of a getpwnam. Used for USER command, since
956 * the data returned must not be clobbered by any other command
958 * NB: The data returned by sgetpwnam() will remain valid until
959 * the next call to this function. Its difference from getpwnam()
960 * is that sgetpwnam() is known to be called from ftpd code only.
962 static struct passwd *
963 sgetpwnam(char *name)
965 static struct passwd save;
968 if ((p = getpwnam(name)) == NULL)
972 free(save.pw_passwd);
978 save.pw_name = sgetsave(p->pw_name);
979 save.pw_passwd = sgetsave(p->pw_passwd);
980 save.pw_gecos = sgetsave(p->pw_gecos);
981 save.pw_dir = sgetsave(p->pw_dir);
982 save.pw_shell = sgetsave(p->pw_shell);
986 static int login_attempts; /* number of failed login attempts */
987 static int askpasswd; /* had user command, ask for passwd */
988 static char curname[MAXLOGNAME]; /* current USER name */
992 * Sets global passwd pointer pw if named account exists and is acceptable;
993 * sets askpasswd if a PASS command is expected. If logged in previously,
994 * need to reset state. If name is "ftp" or "anonymous", the name is not in
995 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
996 * If account doesn't exist, ask for passwd anyway. Otherwise, check user
997 * requesting login privileges. Disallow anyone who does not have a standard
998 * shell as returned by getusershell(). Disallow anyone mentioned in the file
999 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
1008 reply(530, "Can't change user from guest login.");
1010 } else if (dochroot) {
1011 reply(530, "Can't change user from chroot user.");
1018 #ifdef VIRTUAL_HOSTING
1019 pw = sgetpwnam(thishost->anonuser);
1021 pw = sgetpwnam("ftp");
1023 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
1024 if (checkuser(_PATH_FTPUSERS, "ftp", 0, NULL) ||
1025 checkuser(_PATH_FTPUSERS, "anonymous", 0, NULL))
1026 reply(530, "User %s access denied.", name);
1027 else if (pw != NULL) {
1031 "Guest login ok, send your email address as password.");
1033 reply(530, "User %s unknown.", name);
1034 if (!askpasswd && logging)
1036 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost);
1039 if (anon_only != 0) {
1040 reply(530, "Sorry, only anonymous ftp allowed.");
1044 if ((pw = sgetpwnam(name))) {
1045 if ((shell = pw->pw_shell) == NULL || *shell == 0)
1046 shell = _PATH_BSHELL;
1048 while ((cp = getusershell()) != NULL)
1049 if (strcmp(cp, shell) == 0)
1053 if (cp == NULL || checkuser(_PATH_FTPUSERS, name, 1, NULL)) {
1054 reply(530, "User %s access denied.", name);
1057 "FTP LOGIN REFUSED FROM %s, %s",
1064 strncpy(curname, name, sizeof(curname)-1);
1068 /* XXX Kluge! The conversation mechanism needs to be fixed. */
1070 if (opiechallenge(&opiedata, name, opieprompt) == 0) {
1071 pwok = (pw != NULL) &&
1072 opieaccessfile(remotehost) &&
1073 opiealways(pw->pw_dir);
1074 reply(331, "Response to %s %s for %s.",
1075 opieprompt, pwok ? "requested" : "required", name);
1078 reply(331, "Password required for %s.", name);
1082 * Delay before reading passwd after first failed
1083 * attempt to slow down passwd-guessing programs.
1086 sleep(login_attempts);
1090 * Check if a user is in the file "fname",
1091 * return a pointer to a malloc'd string with the rest
1092 * of the matching line in "residue" if not NULL.
1095 checkuser(char *fname, char *name, int pwset, char **residue)
1100 char *line, *mp, *p;
1102 if ((fd = fopen(fname, "r")) != NULL) {
1103 while (!found && (line = fgetln(fd, &len)) != NULL) {
1107 if (line[len - 1] == '\n') {
1108 line[len - 1] = '\0';
1111 if ((mp = malloc(len + 1)) == NULL)
1112 fatalerror("Ran out of memory.");
1113 memcpy(mp, line, len);
1117 /* avoid possible leading and trailing whitespace */
1118 p = strtok(line, " \t");
1119 /* skip empty lines */
1123 * if first chr is '@', check group membership
1129 if (p[1] == '\0') /* single @ matches anyone */
1132 if ((grp = getgrnam(p+1)) == NULL)
1135 * Check user's default group
1137 if (pwset && grp->gr_gid == pw->pw_gid)
1140 * Check supplementary groups
1142 while (!found && grp->gr_mem[i])
1143 found = strcmp(name,
1149 * Otherwise, just check for username match
1152 found = strcmp(p, name) == 0;
1154 * Save the rest of line to "residue" if matched
1156 if (found && residue) {
1157 if ((p = strtok(NULL, "")) != NULL)
1158 p += strspn(p, " \t");
1160 if ((*residue = strdup(p)) == NULL)
1161 fatalerror("Ran out of memory.");
1175 * Terminate login as previous user, if any, resetting state;
1176 * used when USER command is given or login fails.
1186 if (logged_in && dowtmp)
1187 ftpd_logwtmp(ttyline, "", NULL);
1190 setusercontext(NULL, getpwuid(0), 0,
1191 LOGIN_SETPRIORITY|LOGIN_SETRESOURCES|LOGIN_SETUMASK|
1196 if ((e = pam_setcred(pamh, PAM_DELETE_CRED)) != PAM_SUCCESS)
1197 syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
1198 if ((e = pam_close_session(pamh,0)) != PAM_SUCCESS)
1199 syslog(LOG_ERR, "pam_close_session: %s", pam_strerror(pamh, e));
1200 if ((e = pam_end(pamh, e)) != PAM_SUCCESS)
1201 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1213 * the following code is stolen from imap-uw PAM authentication module and
1216 #define COPY_STRING(s) (s ? strdup(s) : NULL)
1219 const char *uname; /* user name */
1220 const char *pass; /* password */
1222 typedef struct cred_t cred_t;
1225 auth_conv(int num_msg, const struct pam_message **msg,
1226 struct pam_response **resp, void *appdata)
1229 cred_t *cred = (cred_t *) appdata;
1230 struct pam_response *reply;
1232 reply = calloc(num_msg, sizeof *reply);
1236 for (i = 0; i < num_msg; i++) {
1237 switch (msg[i]->msg_style) {
1238 case PAM_PROMPT_ECHO_ON: /* assume want user name */
1239 reply[i].resp_retcode = PAM_SUCCESS;
1240 reply[i].resp = COPY_STRING(cred->uname);
1241 /* PAM frees resp. */
1243 case PAM_PROMPT_ECHO_OFF: /* assume want password */
1244 reply[i].resp_retcode = PAM_SUCCESS;
1245 reply[i].resp = COPY_STRING(cred->pass);
1246 /* PAM frees resp. */
1250 reply[i].resp_retcode = PAM_SUCCESS;
1251 reply[i].resp = NULL;
1253 default: /* unknown message style */
1255 return PAM_CONV_ERR;
1264 * Attempt to authenticate the user using PAM. Returns 0 if the user is
1265 * authenticated, or 1 if not authenticated. If some sort of PAM system
1266 * error occurs (e.g., the "/etc/pam.conf" file is missing) then this
1267 * function returns -1. This can be used as an indication that we should
1268 * fall back to a different authentication mechanism.
1271 auth_pam(struct passwd **ppw, const char *pass)
1273 const char *tmpl_user;
1277 cred_t auth_cred = { (*ppw)->pw_name, pass };
1278 struct pam_conv conv = { &auth_conv, &auth_cred };
1280 e = pam_start("ftpd", (*ppw)->pw_name, &conv, &pamh);
1281 if (e != PAM_SUCCESS) {
1283 * In OpenPAM, it's OK to pass NULL to pam_strerror()
1284 * if context creation has failed in the first place.
1286 syslog(LOG_ERR, "pam_start: %s", pam_strerror(NULL, e));
1290 e = pam_set_item(pamh, PAM_RHOST, remotehost);
1291 if (e != PAM_SUCCESS) {
1292 syslog(LOG_ERR, "pam_set_item(PAM_RHOST): %s",
1293 pam_strerror(pamh, e));
1294 if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
1295 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1301 e = pam_authenticate(pamh, 0);
1305 * With PAM we support the concept of a "template"
1306 * user. The user enters a login name which is
1307 * authenticated by PAM, usually via a remote service
1308 * such as RADIUS or TACACS+. If authentication
1309 * succeeds, a different but related "template" name
1310 * is used for setting the credentials, shell, and
1311 * home directory. The name the user enters need only
1312 * exist on the remote authentication server, but the
1313 * template name must be present in the local password
1316 * This is supported by two various mechanisms in the
1317 * individual modules. However, from the application's
1318 * point of view, the template user is always passed
1319 * back as a changed value of the PAM_USER item.
1321 if ((e = pam_get_item(pamh, PAM_USER, &item)) ==
1323 tmpl_user = (const char *) item;
1324 if (strcmp((*ppw)->pw_name, tmpl_user) != 0)
1325 *ppw = getpwnam(tmpl_user);
1327 syslog(LOG_ERR, "Couldn't get PAM_USER: %s",
1328 pam_strerror(pamh, e));
1333 case PAM_USER_UNKNOWN:
1339 syslog(LOG_ERR, "pam_authenticate: %s", pam_strerror(pamh, e));
1345 e = pam_acct_mgmt(pamh, 0);
1346 if (e != PAM_SUCCESS) {
1347 syslog(LOG_ERR, "pam_acct_mgmt: %s",
1348 pam_strerror(pamh, e));
1354 if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
1355 syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
1362 #endif /* USE_PAM */
1370 login_cap_t *lc = NULL;
1375 char *residue = NULL;
1378 if (logged_in || askpasswd == 0) {
1379 reply(503, "Login with USER first.");
1383 if (!guest) { /* "ftp" is only account allowed no password */
1385 rval = 1; /* failure below */
1389 rval = auth_pam(&pw, passwd);
1395 if (opieverify(&opiedata, passwd) == 0)
1396 xpasswd = pw->pw_passwd;
1398 xpasswd = crypt(passwd, pw->pw_passwd);
1399 if (passwd[0] == '\0' && pw->pw_passwd[0] != '\0')
1405 rval = strcmp(pw->pw_passwd, xpasswd);
1406 if (pw->pw_expire && time(NULL) >= pw->pw_expire)
1407 rval = 1; /* failure */
1410 * If rval == 1, the user failed the authentication check
1411 * above. If rval == 0, either PAM or local authentication
1415 reply(530, "Login incorrect.");
1418 "FTP LOGIN FAILED FROM %s",
1420 syslog(LOG_AUTHPRIV | LOG_NOTICE,
1421 "FTP LOGIN FAILED FROM %s, %s",
1422 remotehost, curname);
1425 if (login_attempts++ >= 5) {
1427 "repeated login failures from %s",
1434 login_attempts = 0; /* this time successful */
1435 if (setegid(pw->pw_gid) < 0) {
1436 reply(550, "Can't set gid.");
1439 /* May be overridden by login.conf */
1440 (void) umask(defumask);
1442 if ((lc = login_getpwclass(pw)) != NULL) {
1443 char remote_ip[NI_MAXHOST];
1445 if (getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
1446 remote_ip, sizeof(remote_ip) - 1, NULL, 0,
1449 remote_ip[sizeof(remote_ip) - 1] = 0;
1450 if (!auth_hostok(lc, remotehost, remote_ip)) {
1451 syslog(LOG_INFO|LOG_AUTH,
1452 "FTP LOGIN FAILED (HOST) as %s: permission denied.",
1454 reply(530, "Permission denied.");
1458 if (!auth_timeok(lc, time(NULL))) {
1459 reply(530, "Login not available right now.");
1464 setusercontext(lc, pw, 0,
1465 LOGIN_SETLOGIN|LOGIN_SETGROUP|LOGIN_SETPRIORITY|
1466 LOGIN_SETRESOURCES|LOGIN_SETUMASK|LOGIN_SETMAC);
1468 setlogin(pw->pw_name);
1469 (void) initgroups(pw->pw_name, pw->pw_gid);
1474 if ((e = pam_open_session(pamh, 0)) != PAM_SUCCESS) {
1475 syslog(LOG_ERR, "pam_open_session: %s", pam_strerror(pamh, e));
1476 } else if ((e = pam_setcred(pamh, PAM_ESTABLISH_CRED)) != PAM_SUCCESS) {
1477 syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
1482 /* open wtmp before chroot */
1484 ftpd_logwtmp(ttyline, pw->pw_name,
1485 (struct sockaddr *)&his_addr);
1488 if (guest && stats && statfd < 0)
1489 #ifdef VIRTUAL_HOSTING
1490 statfd = open(thishost->statfile, O_WRONLY|O_APPEND);
1492 statfd = open(_PATH_FTPDSTATFILE, O_WRONLY|O_APPEND);
1498 checkuser(_PATH_FTPCHROOT, pw->pw_name, 1, &residue)
1499 #ifdef LOGIN_CAP /* Allow login.conf configuration as well */
1500 || login_getcapbool(lc, "ftp-chroot", 0)
1505 * For a chrooted local user,
1506 * a) see whether ftpchroot(5) specifies a chroot directory,
1507 * b) extract the directory pathname from the line,
1508 * c) expand it to the absolute pathname if necessary.
1510 if (dochroot && residue &&
1511 (chrootdir = strtok(residue, " \t")) != NULL) {
1512 if (chrootdir[0] != '/')
1513 asprintf(&chrootdir, "%s/%s", pw->pw_dir, chrootdir);
1515 chrootdir = strdup(chrootdir); /* make it permanent */
1516 if (chrootdir == NULL)
1517 fatalerror("Ran out of memory.");
1519 if (guest || dochroot) {
1521 * If no chroot directory set yet, use the login directory.
1522 * Copy it so it can be modified while pw->pw_dir stays intact.
1524 if (chrootdir == NULL &&
1525 (chrootdir = strdup(pw->pw_dir)) == NULL)
1526 fatalerror("Ran out of memory.");
1528 * Check for the "/chroot/./home" syntax,
1529 * separate the chroot and home directory pathnames.
1531 if ((homedir = strstr(chrootdir, "/./")) != NULL) {
1532 *(homedir++) = '\0'; /* wipe '/' */
1533 homedir++; /* skip '.' */
1536 * We MUST do a chdir() after the chroot. Otherwise
1537 * the old current directory will be accessible as "."
1538 * outside the new root!
1543 * Finally, do chroot()
1545 if (chroot(chrootdir) < 0) {
1546 reply(550, "Can't change root.");
1549 } else /* real user w/o chroot */
1550 homedir = pw->pw_dir;
1552 * Set euid *before* doing chdir() so
1553 * a) the user won't be carried to a directory that he couldn't reach
1554 * on his own due to no permission to upper path components,
1555 * b) NFS mounted homedirs w/restrictive permissions will be accessible
1556 * (uid 0 has no root power over NFS if not mapped explicitly.)
1558 if (seteuid(pw->pw_uid) < 0) {
1559 reply(550, "Can't set uid.");
1562 if (chdir(homedir) < 0) {
1563 if (guest || dochroot) {
1564 reply(550, "Can't change to base directory.");
1567 if (chdir("/") < 0) {
1568 reply(550, "Root is inaccessible.");
1571 lreply(230, "No directory! Logging in with home=/.");
1576 * Display a login message, if it exists.
1577 * N.B. reply(230,) must follow the message.
1579 #ifdef VIRTUAL_HOSTING
1580 fd = fopen(thishost->loginmsg, "r");
1582 fd = fopen(_PATH_FTPLOGINMESG, "r");
1585 char *cp, line[LINE_MAX];
1587 while (fgets(line, sizeof(line), fd) != NULL) {
1588 if ((cp = strchr(line, '\n')) != NULL)
1590 lreply(230, "%s", line);
1592 (void) fflush(stdout);
1598 ident = strdup(passwd);
1600 fatalerror("Ran out of memory.");
1602 reply(230, "Guest login ok, access restrictions apply.");
1604 #ifdef VIRTUAL_HOSTING
1605 if (thishost != firsthost)
1606 snprintf(proctitle, sizeof(proctitle),
1607 "%s: anonymous(%s)/%s", remotehost, hostname,
1611 snprintf(proctitle, sizeof(proctitle),
1612 "%s: anonymous/%s", remotehost, passwd);
1613 setproctitle("%s", proctitle);
1614 #endif /* SETPROCTITLE */
1616 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s",
1617 remotehost, passwd);
1620 reply(230, "User %s logged in, "
1621 "access restrictions apply.", pw->pw_name);
1623 reply(230, "User %s logged in.", pw->pw_name);
1626 snprintf(proctitle, sizeof(proctitle),
1627 "%s: user/%s", remotehost, pw->pw_name);
1628 setproctitle("%s", proctitle);
1629 #endif /* SETPROCTITLE */
1631 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s",
1632 remotehost, pw->pw_name);
1634 if (logging && (guest || dochroot))
1635 syslog(LOG_INFO, "session root changed to %s", chrootdir);
1643 /* Forget all about it... */
1653 retrieve(char *cmd, char *name)
1657 int (*closefunc)(FILE *);
1661 fin = fopen(name, "r"), closefunc = fclose;
1666 (void) snprintf(line, sizeof(line), cmd, name), name = line;
1667 fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose;
1669 st.st_blksize = BUFSIZ;
1673 perror_reply(550, name);
1675 LOGCMD("get", name);
1682 if (fstat(fileno(fin), &st) < 0) {
1683 perror_reply(550, name);
1686 if (!S_ISREG(st.st_mode)) {
1688 * Never sending a raw directory is a workaround
1689 * for buggy clients that will attempt to RETR
1690 * a directory before listing it, e.g., Mozilla.
1691 * Preventing a guest from getting irregular files
1692 * is a simple security measure.
1694 if (S_ISDIR(st.st_mode) || guest) {
1695 reply(550, "%s: not a plain file.", name);
1699 /* st.st_blksize is set for all descriptor types */
1702 if (restart_point) {
1703 if (type == TYPE_A) {
1710 if ((c=getc(fin)) == EOF) {
1711 perror_reply(550, name);
1717 } else if (lseek(fileno(fin), restart_point, L_SET) < 0) {
1718 perror_reply(550, name);
1722 dout = dataconn(name, st.st_size, "w");
1726 send_data(fin, dout, st.st_blksize, st.st_size,
1727 restart_point == 0 && cmd == 0 && S_ISREG(st.st_mode));
1728 if (cmd == 0 && guest && stats && byte_count > 0)
1729 logxfer(name, byte_count, start);
1730 (void) fclose(dout);
1735 LOGBYTES("get", name, byte_count);
1740 store(char *name, char *mode, int unique)
1744 int (*closefunc)(FILE *);
1746 if (*mode == 'a') { /* APPE */
1748 /* Programming error */
1749 syslog(LOG_ERR, "Internal: unique flag to APPE");
1752 if (guest && noguestmod) {
1753 reply(550, "Appending to existing file denied.");
1756 restart_point = 0; /* not affected by preceding REST */
1758 if (unique) /* STOU overrides REST */
1760 if (guest && noguestmod) {
1761 if (restart_point) { /* guest STOR w/REST */
1762 reply(550, "Modifying existing file denied.");
1764 } else /* treat guest STOR as STOU */
1769 mode = "r+"; /* so ASCII manual seek can work */
1771 if ((fd = guniquefd(name, &name)) < 0)
1773 fout = fdopen(fd, mode);
1775 fout = fopen(name, mode);
1778 perror_reply(553, name);
1782 if (restart_point) {
1783 if (type == TYPE_A) {
1790 if ((c=getc(fout)) == EOF) {
1791 perror_reply(550, name);
1798 * We must do this seek to "current" position
1799 * because we are changing from reading to
1802 if (fseeko(fout, 0, SEEK_CUR) < 0) {
1803 perror_reply(550, name);
1806 } else if (lseek(fileno(fout), restart_point, L_SET) < 0) {
1807 perror_reply(550, name);
1811 din = dataconn(name, -1, "r");
1814 if (receive_data(din, fout) == 0) {
1816 reply(226, "Transfer complete (unique file name:%s).",
1819 reply(226, "Transfer complete.");
1825 LOGBYTES(*mode == 'a' ? "append" : "put", name, byte_count);
1829 LOGCMD(*mode == 'a' ? "append" : "put" , name);
1834 getdatasock(char *mode)
1836 int on = 1, s, t, tries;
1839 return (fdopen(data, mode));
1841 s = socket(data_dest.su_family, SOCK_STREAM, 0);
1844 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
1845 syslog(LOG_WARNING, "data setsockopt (SO_REUSEADDR): %m");
1846 /* anchor socket to avoid multi-homing problems */
1847 data_source = ctrl_addr;
1848 data_source.su_port = htons(dataport);
1850 for (tries = 1; ; tries++) {
1852 * We should loop here since it's possible that
1853 * another ftpd instance has passed this point and is
1854 * trying to open a data connection in active mode now.
1855 * Until the other connection is opened, we'll be getting
1856 * EADDRINUSE because no SOCK_STREAM sockets in the system
1857 * can share both local and remote addresses, localIP:20
1858 * and *:* in this case.
1860 if (bind(s, (struct sockaddr *)&data_source,
1861 data_source.su_len) >= 0)
1863 if (errno != EADDRINUSE || tries > 10)
1867 (void) seteuid(pw->pw_uid);
1869 if (data_source.su_family == AF_INET)
1871 on = IPTOS_THROUGHPUT;
1872 if (setsockopt(s, IPPROTO_IP, IP_TOS, &on, sizeof(int)) < 0)
1873 syslog(LOG_WARNING, "data setsockopt (IP_TOS): %m");
1878 * Turn off push flag to keep sender TCP from sending short packets
1879 * at the boundaries of each write().
1882 if (setsockopt(s, IPPROTO_TCP, TCP_NOPUSH, &on, sizeof on) < 0)
1883 syslog(LOG_WARNING, "data setsockopt (TCP_NOPUSH): %m");
1885 return (fdopen(s, mode));
1887 /* Return the real value of errno (close may change it) */
1889 (void) seteuid(pw->pw_uid);
1896 dataconn(char *name, off_t size, char *mode)
1900 int retry = 0, tos, conerrno;
1905 (void) snprintf(sizebuf, sizeof(sizebuf),
1906 " (%jd bytes)", (intmax_t)size);
1910 union sockunion from;
1911 socklen_t fromlen = ctrl_addr.su_len;
1913 struct timeval timeout;
1917 FD_SET(pdata, &set);
1919 timeout.tv_usec = 0;
1920 timeout.tv_sec = 120;
1923 * Granted a socket is in the blocking I/O mode,
1924 * accept() will block after a successful select()
1925 * if the selected connection dies in between.
1926 * Therefore set the non-blocking I/O flag here.
1928 if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
1929 fcntl(pdata, F_SETFL, flags | O_NONBLOCK) == -1)
1931 if (select(pdata+1, &set, NULL, NULL, &timeout) <= 0 ||
1932 (s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0)
1934 (void) close(pdata);
1937 * Unset the inherited non-blocking I/O flag
1938 * on the child socket so stdio can work on it.
1940 if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
1941 fcntl(pdata, F_SETFL, flags & ~O_NONBLOCK) == -1)
1944 if (from.su_family == AF_INET)
1946 tos = IPTOS_THROUGHPUT;
1947 if (setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
1948 syslog(LOG_WARNING, "pdata setsockopt (IP_TOS): %m");
1951 reply(150, "Opening %s mode data connection for '%s'%s.",
1952 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
1953 return (fdopen(pdata, mode));
1955 reply(425, "Can't open data connection.");
1956 (void) close(pdata);
1961 reply(125, "Using existing data connection for '%s'%s.",
1964 return (fdopen(data, mode));
1967 data_dest = his_addr;
1970 file = getdatasock(mode);
1972 char hostbuf[NI_MAXHOST], portbuf[NI_MAXSERV];
1974 if (getnameinfo((struct sockaddr *)&data_source,
1976 hostbuf, sizeof(hostbuf) - 1,
1977 portbuf, sizeof(portbuf) - 1,
1978 NI_NUMERICHOST|NI_NUMERICSERV))
1979 *hostbuf = *portbuf = 0;
1980 hostbuf[sizeof(hostbuf) - 1] = 0;
1981 portbuf[sizeof(portbuf) - 1] = 0;
1982 reply(425, "Can't create data socket (%s,%s): %s.",
1983 hostbuf, portbuf, strerror(errno));
1986 data = fileno(file);
1988 if (connect(data, (struct sockaddr *)&data_dest,
1989 data_dest.su_len) == 0)
1992 (void) fclose(file);
1994 if (conerrno == EADDRINUSE) {
2000 } while (retry <= swaitmax);
2001 if (conerrno != 0) {
2002 reply(425, "Can't build data connection: %s.",
2003 strerror(conerrno));
2006 reply(150, "Opening %s mode data connection for '%s'%s.",
2007 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
2012 * A helper macro to avoid code duplication
2013 * in send_data() and receive_data().
2015 * XXX We have to block SIGURG during putc() because BSD stdio
2016 * is unable to restart interrupted write operations and hence
2017 * the entire buffer contents will be lost as soon as a write()
2018 * call indicates EINTR to stdio.
2020 #define FTPD_PUTC(ch, file, label) \
2026 ret = putc((ch), (file)); \
2028 CHECKOOB(return (-1)) \
2029 else if (ferror(file)) \
2032 } while (ret == EOF); \
2036 * Tranfer the contents of "instr" to "outstr" peer using the appropriate
2037 * encapsulation of the data subject to Mode, Structure, and Type.
2039 * NB: Form isn't handled.
2042 send_data(FILE *instr, FILE *outstr, size_t blksize, off_t filesize, int isreg)
2044 int c, cp, filefd, netfd;
2055 CHECKOOB(return (-1))
2056 else if (c == EOF && ferror(instr))
2059 if (ferror(instr)) { /* resume after OOB */
2063 if (feof(instr)) /* EOF */
2065 syslog(LOG_ERR, "Internal: impossible condition"
2066 " on file after getc()");
2069 if (c == '\n' && cp != '\r') {
2070 FTPD_PUTC('\r', outstr, data_err);
2073 FTPD_PUTC(c, outstr, data_err);
2077 #ifdef notyet /* BSD stdio isn't ready for that */
2078 while (fflush(outstr) == EOF) {
2079 CHECKOOB(return (-1))
2087 if (fflush(outstr) == EOF)
2090 reply(226, "Transfer complete.");
2096 * isreg is only set if we are not doing restart and we
2097 * are sending a regular file
2099 netfd = fileno(outstr);
2100 filefd = fileno(instr);
2103 char *msg = "Transfer complete.";
2109 while (filesize > 0) {
2110 err = sendfile(filefd, netfd, offset, 0,
2113 * Calculate byte_count before OOB processing.
2114 * It can be used in myoob() later.
2119 CHECKOOB(return (-1))
2120 else if (err == -1) {
2121 if (errno != EINTR &&
2122 cnt == 0 && offset == 0)
2126 if (err == -1) /* resume after OOB */
2129 * We hit the EOF prematurely.
2130 * Perhaps the file was externally truncated.
2133 msg = "Transfer finished due to "
2134 "premature end of file.";
2144 if ((buf = malloc(blksize)) == NULL) {
2146 reply(451, "Ran out of memory.");
2154 cnt = read(filefd, buf, blksize);
2155 CHECKOOB(free(buf); return (-1))
2160 if (cnt < 0) /* resume after OOB */
2162 if (cnt == 0) /* EOF */
2164 for (len = cnt, bp = buf; len > 0;) {
2165 cnt = write(netfd, bp, len);
2166 CHECKOOB(free(buf); return (-1))
2180 reply(226, "Transfer complete.");
2184 reply(550, "Unimplemented TYPE %d in send_data.", type);
2190 perror_reply(426, "Data connection");
2195 perror_reply(551, "Error on input file");
2200 * Transfer data from peer to "outstr" using the appropriate encapulation of
2201 * the data subject to Mode, Structure, and Type.
2203 * N.B.: Form isn't handled.
2206 receive_data(FILE *instr, FILE *outstr)
2222 cnt = read(fileno(instr), buf, sizeof(buf));
2223 CHECKOOB(return (-1))
2226 if (cnt < 0) /* resume after OOB */
2228 if (cnt == 0) /* EOF */
2230 for (len = cnt, bp = buf; len > 0;) {
2231 cnt = write(fileno(outstr), bp, len);
2232 CHECKOOB(return (-1))
2247 reply(553, "TYPE E not implemented.");
2254 CHECKOOB(return (-1))
2255 else if (c == EOF && ferror(instr))
2257 if (c == EOF && ferror(instr)) { /* resume after OOB */
2264 FTPD_PUTC('\r', outstr, file_err);
2274 /* Check for EOF here in order not to lose last \r. */
2276 if (feof(instr)) /* EOF */
2278 syslog(LOG_ERR, "Internal: impossible condition"
2279 " on data stream after getc()");
2284 FTPD_PUTC(c, outstr, file_err);
2287 #ifdef notyet /* BSD stdio isn't ready for that */
2288 while (fflush(outstr) == EOF) {
2289 CHECKOOB(return (-1))
2297 if (fflush(outstr) == EOF)
2302 "WARNING! %d bare linefeeds received in ASCII mode.",
2304 (void)printf(" File may not have transferred correctly.\r\n");
2309 reply(550, "Unimplemented TYPE %d in receive_data.", type);
2315 perror_reply(426, "Data connection");
2320 perror_reply(452, "Error writing to file");
2325 statfilecmd(char *filename)
2330 char line[LINE_MAX];
2333 code = lstat(filename, &st) == 0 && S_ISDIR(st.st_mode) ? 212 : 213;
2334 (void)snprintf(line, sizeof(line), _PATH_LS " -lgA %s", filename);
2335 fin = ftpd_popen(line, "r");
2336 lreply(code, "Status of %s:", filename);
2338 while ((c = getc(fin)) != EOF) {
2340 if (ferror(stdout)){
2341 perror_reply(421, "Control connection");
2342 (void) ftpd_pclose(fin);
2347 perror_reply(551, filename);
2348 (void) ftpd_pclose(fin);
2351 (void) putc('\r', stdout);
2354 * RFC 959 says neutral text should be prepended before
2355 * a leading 3-digit number followed by whitespace, but
2356 * many ftp clients can be confused by any leading digits,
2357 * as a matter of fact.
2359 if (atstart && isdigit(c))
2360 (void) putc(' ', stdout);
2361 (void) putc(c, stdout);
2362 atstart = (c == '\n');
2364 (void) ftpd_pclose(fin);
2365 reply(code, "End of status.");
2371 union sockunion *su;
2373 char hname[NI_MAXHOST];
2377 lreply(211, "%s FTP server status:", hostname);
2378 printf(" %s\r\n", version);
2380 lreply(211, "FTP server status:");
2381 printf(" Connected to %s", remotehost);
2382 if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
2383 hname, sizeof(hname) - 1, NULL, 0, NI_NUMERICHOST)) {
2384 hname[sizeof(hname) - 1] = 0;
2385 if (strcmp(hname, remotehost) != 0)
2386 printf(" (%s)", hname);
2391 printf(" Logged in anonymously\r\n");
2393 printf(" Logged in as %s\r\n", pw->pw_name);
2394 } else if (askpasswd)
2395 printf(" Waiting for password\r\n");
2397 printf(" Waiting for user name\r\n");
2398 printf(" TYPE: %s", typenames[type]);
2399 if (type == TYPE_A || type == TYPE_E)
2400 printf(", FORM: %s", formnames[form]);
2403 printf(" %d", CHAR_BIT);
2405 printf(" %d", bytesize); /* need definition! */
2407 printf("; STRUcture: %s; transfer MODE: %s\r\n",
2408 strunames[stru], modenames[mode]);
2410 printf(" Data connection open\r\n");
2411 else if (pdata != -1) {
2415 } else if (usedefault == 0) {
2419 #define UC(b) (((int) b) & 0xff)
2421 printf(" EPSV only mode (EPSV ALL)\r\n");
2426 if (su->su_family == AF_INET) {
2427 a = (u_char *) &su->su_sin.sin_addr;
2428 p = (u_char *) &su->su_sin.sin_port;
2429 printf(" %s (%d,%d,%d,%d,%d,%d)\r\n",
2430 ispassive ? "PASV" : "PORT",
2431 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
2432 UC(p[0]), UC(p[1]));
2439 switch (su->su_family) {
2441 a = (u_char *) &su->su_sin.sin_addr;
2442 p = (u_char *) &su->su_sin.sin_port;
2443 alen = sizeof(su->su_sin.sin_addr);
2447 a = (u_char *) &su->su_sin6.sin6_addr;
2448 p = (u_char *) &su->su_sin6.sin6_port;
2449 alen = sizeof(su->su_sin6.sin6_addr);
2457 printf(" %s (%d,%d,", ispassive ? "LPSV" : "LPRT",
2459 for (i = 0; i < alen; i++)
2460 printf("%d,", UC(a[i]));
2461 printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1]));
2470 switch (su->su_family) {
2482 union sockunion tmp;
2485 if (tmp.su_family == AF_INET6)
2486 tmp.su_sin6.sin6_scope_id = 0;
2487 if (!getnameinfo((struct sockaddr *)&tmp, tmp.su_len,
2488 hname, sizeof(hname) - 1, NULL, 0,
2490 hname[sizeof(hname) - 1] = 0;
2491 printf(" %s |%d|%s|%d|\r\n",
2492 ispassive ? "EPSV" : "EPRT",
2493 af, hname, htons(tmp.su_port));
2499 printf(" No data connection\r\n");
2500 reply(211, "End of status.");
2507 reply(451, "Error in server: %s", s);
2508 reply(221, "Closing connection due to server error.");
2514 reply(int n, const char *fmt, ...)
2518 (void)printf("%d ", n);
2520 (void)vprintf(fmt, ap);
2522 (void)printf("\r\n");
2523 (void)fflush(stdout);
2525 syslog(LOG_DEBUG, "<--- %d ", n);
2527 vsyslog(LOG_DEBUG, fmt, ap);
2533 lreply(int n, const char *fmt, ...)
2537 (void)printf("%d- ", n);
2539 (void)vprintf(fmt, ap);
2541 (void)printf("\r\n");
2542 (void)fflush(stdout);
2544 syslog(LOG_DEBUG, "<--- %d- ", n);
2546 vsyslog(LOG_DEBUG, fmt, ap);
2555 reply(250, "%s command successful.", s);
2562 reply(502, "%s command not implemented.", s);
2571 if ((cp = strchr(cbuf,'\n')))
2573 reply(500, "%s: command not understood.", cbuf);
2581 LOGCMD("delete", name);
2582 if (lstat(name, &st) < 0) {
2583 perror_reply(550, name);
2586 if (S_ISDIR(st.st_mode)) {
2587 if (rmdir(name) < 0) {
2588 perror_reply(550, name);
2593 if (guest && noguestmod) {
2594 reply(550, "Operation not permitted.");
2597 if (unlink(name) < 0) {
2598 perror_reply(550, name);
2609 if (chdir(path) < 0)
2610 perror_reply(550, path);
2620 LOGCMD("mkdir", name);
2621 if (guest && noguestmkd)
2622 reply(550, "Operation not permitted.");
2623 else if (mkdir(name, 0777) < 0)
2624 perror_reply(550, name);
2626 if ((s = doublequote(name)) == NULL)
2627 fatalerror("Ran out of memory.");
2628 reply(257, "\"%s\" directory created.", s);
2634 removedir(char *name)
2637 LOGCMD("rmdir", name);
2638 if (rmdir(name) < 0)
2639 perror_reply(550, name);
2647 char *s, path[MAXPATHLEN + 1];
2649 if (getcwd(path, sizeof(path)) == NULL)
2650 perror_reply(550, "Get current directory");
2652 if ((s = doublequote(path)) == NULL)
2653 fatalerror("Ran out of memory.");
2654 reply(257, "\"%s\" is current directory.", s);
2660 renamefrom(char *name)
2664 if (guest && noguestmod) {
2665 reply(550, "Operation not permitted.");
2668 if (lstat(name, &st) < 0) {
2669 perror_reply(550, name);
2672 reply(350, "File exists, ready for destination name.");
2677 renamecmd(char *from, char *to)
2681 LOGCMD2("rename", from, to);
2683 if (guest && (stat(to, &st) == 0)) {
2684 reply(550, "%s: permission denied.", to);
2688 if (rename(from, to) < 0)
2689 perror_reply(550, "rename");
2695 dolog(struct sockaddr *who)
2697 char who_name[NI_MAXHOST];
2699 realhostname_sa(remotehost, sizeof(remotehost) - 1, who, who->sa_len);
2700 remotehost[sizeof(remotehost) - 1] = 0;
2701 if (getnameinfo(who, who->sa_len,
2702 who_name, sizeof(who_name) - 1, NULL, 0, NI_NUMERICHOST))
2704 who_name[sizeof(who_name) - 1] = 0;
2707 #ifdef VIRTUAL_HOSTING
2708 if (thishost != firsthost)
2709 snprintf(proctitle, sizeof(proctitle), "%s: connected (to %s)",
2710 remotehost, hostname);
2713 snprintf(proctitle, sizeof(proctitle), "%s: connected",
2715 setproctitle("%s", proctitle);
2716 #endif /* SETPROCTITLE */
2719 #ifdef VIRTUAL_HOSTING
2720 if (thishost != firsthost)
2721 syslog(LOG_INFO, "connection from %s (%s) to %s",
2722 remotehost, who_name, hostname);
2725 syslog(LOG_INFO, "connection from %s (%s)",
2726 remotehost, who_name);
2731 * Record logout in wtmp file
2732 * and exit with supplied status.
2735 dologout(int status)
2738 if (logged_in && dowtmp) {
2740 ftpd_logwtmp(ttyline, "", NULL);
2742 /* beware of flushing buffers after a SIGPIPE */
2760 syslog(LOG_ERR, "Internal: maskurg() while no transfer");
2765 sigaddset(&sset, SIGURG);
2766 sigprocmask(flag ? SIG_BLOCK : SIG_UNBLOCK, &sset, NULL);
2776 syslog(LOG_ERR, "Internal: flagxfer(1): "
2777 "transfer already under way");
2783 syslog(LOG_ERR, "Internal: flagxfer(0): "
2784 "no active transfer");
2791 * Returns 0 if OK to resume or -1 if abort requested.
2799 syslog(LOG_ERR, "Internal: myoob() while no transfer");
2803 if (getline(cp, 7, stdin) == NULL) {
2804 reply(221, "You could at least say goodbye.");
2808 if (strcmp(cp, "ABOR\r\n") == 0) {
2810 reply(426, "Transfer aborted. Data connection closed.");
2811 reply(226, "Abort successful.");
2814 if (strcmp(cp, "STAT\r\n") == 0) {
2816 if (file_size != -1)
2817 reply(213, "Status: %jd of %jd bytes transferred.",
2818 (intmax_t)byte_count, (intmax_t)file_size);
2820 reply(213, "Status: %jd bytes transferred.",
2821 (intmax_t)byte_count);
2827 * Note: a response of 425 is not mentioned as a possible response to
2828 * the PASV command in RFC959. However, it has been blessed as
2829 * a legitimate response by Jon Postel in a telephone conversation
2830 * with Rick Adams on 25 Jan 89.
2839 if (pdata >= 0) /* close old port if one set */
2842 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2844 perror_reply(425, "Can't open passive connection");
2848 if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
2849 syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
2854 if (ctrl_addr.su_family == AF_INET) {
2855 on = restricted_data_ports ? IP_PORTRANGE_HIGH
2856 : IP_PORTRANGE_DEFAULT;
2858 if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
2859 &on, sizeof(on)) < 0)
2863 #ifdef IPV6_PORTRANGE
2864 if (ctrl_addr.su_family == AF_INET6) {
2865 on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
2866 : IPV6_PORTRANGE_DEFAULT;
2868 if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
2869 &on, sizeof(on)) < 0)
2874 pasv_addr = ctrl_addr;
2875 pasv_addr.su_port = 0;
2876 if (bind(pdata, (struct sockaddr *)&pasv_addr, pasv_addr.su_len) < 0)
2879 (void) seteuid(pw->pw_uid);
2881 len = sizeof(pasv_addr);
2882 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
2884 if (listen(pdata, 1) < 0)
2886 if (pasv_addr.su_family == AF_INET)
2887 a = (char *) &pasv_addr.su_sin.sin_addr;
2888 else if (pasv_addr.su_family == AF_INET6 &&
2889 IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr))
2890 a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
2894 p = (char *) &pasv_addr.su_port;
2896 #define UC(b) (((int) b) & 0xff)
2898 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
2899 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
2903 (void) seteuid(pw->pw_uid);
2904 (void) close(pdata);
2906 perror_reply(425, "Can't open passive connection");
2911 * Long Passive defined in RFC 1639.
2912 * 228 Entering Long Passive Mode
2913 * (af, hal, h1, h2, h3,..., pal, p1, p2...)
2917 long_passive(char *cmd, int pf)
2923 if (pdata >= 0) /* close old port if one set */
2926 if (pf != PF_UNSPEC) {
2927 if (ctrl_addr.su_family != pf) {
2928 switch (ctrl_addr.su_family) {
2941 * only EPRT/EPSV ready clients will understand this
2943 if (strcmp(cmd, "EPSV") == 0 && pf) {
2944 reply(522, "Network protocol mismatch, "
2947 reply(501, "Network protocol mismatch."); /*XXX*/
2953 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2955 perror_reply(425, "Can't open passive connection");
2959 if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
2960 syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
2964 pasv_addr = ctrl_addr;
2965 pasv_addr.su_port = 0;
2966 len = pasv_addr.su_len;
2969 if (ctrl_addr.su_family == AF_INET) {
2970 on = restricted_data_ports ? IP_PORTRANGE_HIGH
2971 : IP_PORTRANGE_DEFAULT;
2973 if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
2974 &on, sizeof(on)) < 0)
2978 #ifdef IPV6_PORTRANGE
2979 if (ctrl_addr.su_family == AF_INET6) {
2980 on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
2981 : IPV6_PORTRANGE_DEFAULT;
2983 if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
2984 &on, sizeof(on)) < 0)
2989 if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0)
2992 (void) seteuid(pw->pw_uid);
2994 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
2996 if (listen(pdata, 1) < 0)
2999 #define UC(b) (((int) b) & 0xff)
3001 if (strcmp(cmd, "LPSV") == 0) {
3002 p = (char *)&pasv_addr.su_port;
3003 switch (pasv_addr.su_family) {
3005 a = (char *) &pasv_addr.su_sin.sin_addr;
3008 "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)",
3009 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
3010 2, UC(p[0]), UC(p[1]));
3013 if (IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr)) {
3014 a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
3017 a = (char *) &pasv_addr.su_sin6.sin6_addr;
3019 "Entering Long Passive Mode "
3020 "(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)",
3021 6, 16, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
3022 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]),
3023 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]),
3024 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]),
3025 2, UC(p[0]), UC(p[1]));
3028 } else if (strcmp(cmd, "EPSV") == 0) {
3029 switch (pasv_addr.su_family) {
3032 reply(229, "Entering Extended Passive Mode (|||%d|)",
3033 ntohs(pasv_addr.su_port));
3037 /* more proper error code? */
3041 (void) seteuid(pw->pw_uid);
3042 (void) close(pdata);
3044 perror_reply(425, "Can't open passive connection");
3049 * Generate unique name for file with basename "local"
3050 * and open the file in order to avoid possible races.
3051 * Try "local" first, then "local.1", "local.2" etc, up to "local.99".
3052 * Return descriptor to the file, set "name" to its name.
3054 * Generates failure reply on error.
3057 guniquefd(char *local, char **name)
3059 static char new[MAXPATHLEN];
3065 cp = strrchr(local, '/');
3068 if (stat(cp ? local : ".", &st) < 0) {
3069 perror_reply(553, cp ? local : ".");
3074 * Let not overwrite dirname with counter suffix.
3076 * In this extreme case dot won't be put in front of suffix.
3078 if (strlen(local) > sizeof(new) - 4) {
3079 reply(553, "Pathname too long.");
3084 /* -4 is for the .nn<null> we put on the end below */
3085 (void) snprintf(new, sizeof(new) - 4, "%s", local);
3086 cp = new + strlen(new);
3088 * Don't generate dotfile unless requested explicitly.
3089 * This covers the case when basename gets truncated off
3092 if (cp > new && cp[-1] != '/')
3094 for (count = 0; count < 100; count++) {
3095 /* At count 0 try unmodified name */
3097 (void)sprintf(cp, "%d", count);
3098 if ((fd = open(count ? new : local,
3099 O_RDWR | O_CREAT | O_EXCL, 0666)) >= 0) {
3100 *name = count ? new : local;
3103 if (errno != EEXIST) {
3104 perror_reply(553, count ? new : local);
3108 reply(452, "Unique file name cannot be created.");
3113 * Format and send reply containing system error number.
3116 perror_reply(int code, char *string)
3119 reply(code, "%s: %s.", string, strerror(errno));
3122 static char *onefile[] = {
3128 send_file_list(char *whichf)
3134 char **dirlist, *dirname;
3139 if (strpbrk(whichf, "~{[*?") != NULL) {
3140 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
3142 memset(&gl, 0, sizeof(gl));
3143 gl.gl_matchc = MAXGLOBARGS;
3144 flags |= GLOB_LIMIT;
3146 if (glob(whichf, flags, 0, &gl)) {
3147 reply(550, "No matching files found.");
3149 } else if (gl.gl_pathc == 0) {
3151 perror_reply(550, whichf);
3154 dirlist = gl.gl_pathv;
3156 onefile[0] = whichf;
3161 while ((dirname = *dirlist++)) {
3162 if (stat(dirname, &st) < 0) {
3164 * If user typed "ls -l", etc, and the client
3165 * used NLST, do what the user meant.
3167 if (dirname[0] == '-' && *dirlist == NULL &&
3169 retrieve(_PATH_LS " %s", dirname);
3171 perror_reply(550, whichf);
3175 if (S_ISREG(st.st_mode)) {
3177 dout = dataconn("file list", -1, "w");
3183 fprintf(dout, "%s%s\n", dirname,
3184 type == TYPE_A ? "\r" : "");
3188 byte_count += strlen(dirname) +
3189 (type == TYPE_A ? 2 : 1);
3190 CHECKOOB(goto abrt);
3192 } else if (!S_ISDIR(st.st_mode))
3195 if ((dirp = opendir(dirname)) == NULL)
3198 while ((dir = readdir(dirp)) != NULL) {
3199 char nbuf[MAXPATHLEN];
3201 CHECKOOB(goto abrt);
3203 if (dir->d_name[0] == '.' && dir->d_namlen == 1)
3205 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' &&
3209 snprintf(nbuf, sizeof(nbuf),
3210 "%s/%s", dirname, dir->d_name);
3213 * We have to do a stat to insure it's
3214 * not a directory or special file.
3216 if (simple || (stat(nbuf, &st) == 0 &&
3217 S_ISREG(st.st_mode))) {
3219 dout = dataconn("file list", -1, "w");
3225 if (nbuf[0] == '.' && nbuf[1] == '/')
3226 fprintf(dout, "%s%s\n", &nbuf[2],
3227 type == TYPE_A ? "\r" : "");
3229 fprintf(dout, "%s%s\n", nbuf,
3230 type == TYPE_A ? "\r" : "");
3234 byte_count += strlen(nbuf) +
3235 (type == TYPE_A ? 2 : 1);
3236 CHECKOOB(goto abrt);
3239 (void) closedir(dirp);
3244 reply(550, "No files found.");
3245 else if (ferror(dout))
3246 data_err: perror_reply(550, "Data connection");
3248 reply(226, "Transfer complete.");
3253 (void) fclose(dout);
3258 (void) closedir(dirp);
3266 reapchild(int signo)
3268 while (waitpid(-1, NULL, WNOHANG) > 0);
3271 #ifdef OLD_SETPROCTITLE
3273 * Clobber argv so ps will show what we're doing. (Stolen from sendmail.)
3274 * Warning, since this is usually started from inetd.conf, it often doesn't
3275 * have much of an environment or arglist to overwrite.
3278 setproctitle(const char *fmt, ...)
3286 (void)vsnprintf(buf, sizeof(buf), fmt, ap);
3288 /* make ps print our process name */
3293 if (i > LastArgv - p - 2) {
3294 i = LastArgv - p - 2;
3299 if (ch != '\n' && ch != '\r')
3301 while (p < LastArgv)
3304 #endif /* OLD_SETPROCTITLE */
3307 appendf(char **strp, char *fmt, ...)
3313 vasprintf(&p, fmt, ap);
3316 fatalerror("Ran out of memory.");
3321 asprintf(strp, "%s%s", ostr, p);
3323 fatalerror("Ran out of memory.");
3329 logcmd(char *cmd, char *file1, char *file2, off_t cnt)
3332 char wd[MAXPATHLEN + 1];
3337 if (getcwd(wd, sizeof(wd) - 1) == NULL)
3338 strcpy(wd, strerror(errno));
3340 appendf(&msg, "%s", cmd);
3342 appendf(&msg, " %s", file1);
3344 appendf(&msg, " %s", file2);
3346 appendf(&msg, " = %jd bytes", (intmax_t)cnt);
3347 appendf(&msg, " (wd: %s", wd);
3348 if (guest || dochroot)
3349 appendf(&msg, "; chrooted");
3351 syslog(LOG_INFO, "%s", msg);
3356 logxfer(char *name, off_t size, time_t start)
3358 char buf[MAXPATHLEN + 1024];
3359 char path[MAXPATHLEN + 1];
3364 if (realpath(name, path) == NULL) {
3365 syslog(LOG_NOTICE, "realpath failed on %s: %m", path);
3368 snprintf(buf, sizeof(buf), "%.20s!%s!%s!%s!%jd!%ld\n",
3369 ctime(&now)+4, ident, remotehost,
3370 path, (intmax_t)size,
3371 (long)(now - start + (now == start)));
3372 write(statfd, buf, strlen(buf));
3377 doublequote(char *s)
3382 for (p = s, n = 0; *p; p++)
3386 if ((s2 = malloc(p - s + n + 1)) == NULL)
3389 for (p = s2; *s; s++, p++) {
3390 if ((*p = *s) == '"')
3398 /* setup server socket for specified address family */
3399 /* if af is PF_UNSPEC more than one socket may be returned */
3400 /* the returned list is dynamically allocated, so caller needs to free it */
3402 socksetup(int af, char *bindname, const char *bindport)
3404 struct addrinfo hints, *res, *r;
3405 int error, maxs, *s, *socks;
3408 memset(&hints, 0, sizeof(hints));
3409 hints.ai_flags = AI_PASSIVE;
3410 hints.ai_family = af;
3411 hints.ai_socktype = SOCK_STREAM;
3412 error = getaddrinfo(bindname, bindport, &hints, &res);
3414 syslog(LOG_ERR, "%s", gai_strerror(error));
3415 if (error == EAI_SYSTEM)
3416 syslog(LOG_ERR, "%s", strerror(errno));
3420 /* Count max number of sockets we may open */
3421 for (maxs = 0, r = res; r; r = r->ai_next, maxs++)
3423 socks = malloc((maxs + 1) * sizeof(int));
3426 syslog(LOG_ERR, "couldn't allocate memory for sockets");
3430 *socks = 0; /* num of sockets counter at start of array */
3432 for (r = res; r; r = r->ai_next) {
3433 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
3435 syslog(LOG_DEBUG, "control socket: %m");
3438 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
3439 &on, sizeof(on)) < 0)
3441 "control setsockopt (SO_REUSEADDR): %m");
3442 if (r->ai_family == AF_INET6) {
3443 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
3444 &on, sizeof(on)) < 0)
3446 "control setsockopt (IPV6_V6ONLY): %m");
3448 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
3449 syslog(LOG_DEBUG, "control bind: %m");
3461 syslog(LOG_ERR, "control socket: Couldn't bind to any socket");