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/* $NetBSD: ftpd.c,v 1.87 2000/03/05 06:12:19 lukem Exp $ */
/*
* Copyright (c) 1997-2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (C) 1997 and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT(
"@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)ftpd.c 8.5 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: ftpd.c,v 1.87 2000/03/05 06:12:19 lukem Exp $");
#endif
#endif /* not lint */
/*
* FTP server.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#define FTP_NAMES
#include <arpa/ftp.h>
#include <arpa/inet.h>
#include <arpa/telnet.h>
#include <ctype.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <glob.h>
#include <grp.h>
#include <limits.h>
#include <netdb.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include <utmp.h>
#ifdef SKEY
#include <skey.h>
#endif
#ifdef KERBEROS5
#include <com_err.h>
#include <krb5/krb5.h>
#endif
#define GLOBAL
#include "extern.h"
#include "pathnames.h"
#include "version.h"
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
int data;
jmp_buf urgcatch;
struct passwd *pw;
int sflag;
int stru; /* avoid C keyword */
int mode;
int doutmp = 0; /* update utmp file */
int mapped = 0; /* IPv4 connection on AF_INET6 socket */
off_t file_size;
off_t byte_count;
static char ttyline[20];
char *tty = ttyline; /* for klogin */
static struct utmp utmp; /* for utmp */
static char *anondir = NULL;
static char confdir[MAXPATHLEN];
#if defined(KERBEROS) || defined(KERBEROS5)
int notickets = 1;
char *krbtkfile_env = NULL;
#endif
int epsvall = 0;
/*
* Timeout intervals for retrying connections
* to hosts that don't accept PORT cmds. This
* is a kludge, but given the problems with TCP...
*/
#define SWAITMAX 90 /* wait at most 90 seconds */
#define SWAITINT 5 /* interval between retries */
int swaitmax = SWAITMAX;
int swaitint = SWAITINT;
#define CURCLASSTYPE curclass.type == CLASS_GUEST ? "GUEST" : \
curclass.type == CLASS_CHROOT ? "CHROOT" : \
curclass.type == CLASS_REAL ? "REAL" : \
"<unknown>"
static void ack __P((const char *));
static int bind_pasv_addr __P((void));
static int checkuser __P((const char *, const char *, int, int, char **));
static int checkaccess __P((const char *));
static FILE *dataconn __P((const char *, off_t, const char *));
static void dolog __P((struct sockaddr *));
static void end_login __P((void));
static FILE *getdatasock __P((const char *));
static char *gunique __P((const char *));
static void lostconn __P((int));
static void myoob __P((int));
static int receive_data __P((FILE *, FILE *));
static void replydirname __P((const char *, const char *));
static int send_data __P((FILE *, FILE *, off_t, int));
static struct passwd *
sgetpwnam __P((const char *));
int main __P((int, char *[]));
#if defined(KERBEROS) || defined(KERBEROS5)
int klogin __P((struct passwd *, char *, char *, char *));
void kdestroy __P((void));
#endif
int
main(argc, argv)
int argc;
char *argv[];
{
int addrlen, ch, on = 1, tos, keepalive;
#ifdef KERBEROS5
krb5_error_code kerror;
#endif
connections = 1;
debug = 0;
logging = 0;
pdata = -1;
sflag = 0;
usedefault = 1;
(void)strcpy(confdir, _DEFAULT_CONFDIR);
hostname[0] = '\0';
while ((ch = getopt(argc, argv, "a:c:C:dh:lst:T:u:Uv")) != -1) {
switch (ch) {
case 'a':
anondir = optarg;
break;
case 'c':
(void)strlcpy(confdir, optarg, sizeof(confdir));
break;
case 'C':
pw = sgetpwnam(optarg);
exit(checkaccess(optarg) ? 0 : 1);
/* NOTREACHED */
case 'd':
case 'v': /* deprecated */
debug = 1;
break;
case 'h':
strlcpy(hostname, optarg, sizeof(hostname));
break;
case 'l':
logging++; /* > 1 == extra logging */
break;
case 's':
sflag = 1;
break;
case 't':
case 'T':
case 'u':
warnx("-%c has been deprecated in favour of ftpd.conf",
ch);
break;
case 'U':
doutmp = 1;
break;
default:
if (optopt == 'a' || optopt == 'C')
exit(1);
warnx("unknown flag -%c ignored", optopt);
break;
}
}
/*
* LOG_NDELAY sets up the logging connection immediately,
* necessary for anonymous ftp's that chroot and can't do it later.
*/
openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
addrlen = sizeof(his_addr); /* xxx */
if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
exit(1);
}
addrlen = sizeof(ctrl_addr);
if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
exit(1);
}
if (his_addr.su_family == AF_INET6
&& IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr)) {
#if 1
/*
* IPv4 control connection arrived to AF_INET6 socket.
* I hate to do this, but this is the easiest solution.
*/
union sockunion tmp_addr;
const int off = sizeof(struct in6_addr) - sizeof(struct in_addr);
tmp_addr = his_addr;
memset(&his_addr, 0, sizeof(his_addr));
his_addr.su_sin.sin_family = AF_INET;
his_addr.su_sin.sin_len = sizeof(his_addr.su_sin);
memcpy(&his_addr.su_sin.sin_addr,
&tmp_addr.su_sin6.sin6_addr.s6_addr[off],
sizeof(his_addr.su_sin.sin_addr));
his_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port;
tmp_addr = ctrl_addr;
memset(&ctrl_addr, 0, sizeof(ctrl_addr));
ctrl_addr.su_sin.sin_family = AF_INET;
ctrl_addr.su_sin.sin_len = sizeof(ctrl_addr.su_sin);
memcpy(&ctrl_addr.su_sin.sin_addr,
&tmp_addr.su_sin6.sin6_addr.s6_addr[off],
sizeof(ctrl_addr.su_sin.sin_addr));
ctrl_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port;
#else
while (fgets(line, sizeof(line), fd) != NULL) {
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
lreply(530, "%s", line);
}
(void) fflush(stdout);
(void) fclose(fd);
reply(530,
"Connection from IPv4 mapped address is not supported.");
exit(0);
#endif
mapped = 1;
} else
mapped = 0;
#ifdef IP_TOS
if (!mapped && his_addr.su_family == AF_INET) {
tos = IPTOS_LOWDELAY;
if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos,
sizeof(int)) < 0)
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
}
#endif
data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1);
/* if the hostname hasn't been given, attempt to determine it */
if (hostname[0] == '\0') {
if (getnameinfo((struct sockaddr *)&ctrl_addr, ctrl_addr.su_len,
hostname, sizeof(hostname), NULL, 0, 0) != 0)
(void)gethostname(hostname, sizeof(hostname));
hostname[sizeof(hostname) - 1] = '\0';
}
/* set this here so klogin can use it... */
(void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid());
(void) freopen(_PATH_DEVNULL, "w", stderr);
(void) signal(SIGPIPE, lostconn);
(void) signal(SIGCHLD, SIG_IGN);
if (signal(SIGURG, myoob) == SIG_ERR)
syslog(LOG_ERR, "signal: %m");
/* Try to handle urgent data inline */
#ifdef SO_OOBINLINE
if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt: %m");
#endif
/* Set keepalives on the socket to detect dropped connections. */
#ifdef SO_KEEPALIVE
keepalive = 1;
if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive,
sizeof(int)) < 0)
syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
#endif
#ifdef F_SETOWN
if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
syslog(LOG_ERR, "fcntl F_SETOWN: %m");
#endif
dolog((struct sockaddr *)&his_addr);
/*
* Set up default state
*/
data = -1;
type = TYPE_A;
form = FORM_N;
stru = STRU_F;
mode = MODE_S;
tmpline[0] = '\0';
hasyyerrored = 0;
#ifdef KERBEROS5
kerror = krb5_init_context(&kcontext);
if (kerror) {
syslog(LOG_NOTICE, "%s when initializing Kerberos context",
error_message(kerror));
exit(0);
}
#endif /* KERBEROS5 */
init_curclass();
curclass.timeout = 300; /* 5 minutes, as per login(1) */
curclass.type = CLASS_REAL;
/* If logins are disabled, print out the message. */
if (format_file(_PATH_NOLOGIN, 530)) {
reply(530, "System not available.");
exit(0);
}
(void)format_file(conffilename(_PATH_FTPWELCOME), 220);
/* reply(220,) must follow */
reply(220, "%s FTP server (%s) ready.", hostname, FTPD_VERSION);
(void) setjmp(errcatch);
for (;;)
(void) yyparse();
/* NOTREACHED */
}
static void
lostconn(signo)
int signo;
{
if (debug)
syslog(LOG_DEBUG, "lost connection");
dologout(1);
}
/*
* Save the result of a getpwnam. Used for USER command, since
* the data returned must not be clobbered by any other command
* (e.g., globbing).
*/
static struct passwd *
sgetpwnam(name)
const char *name;
{
static struct passwd save;
struct passwd *p;
if ((p = getpwnam(name)) == NULL)
return (p);
if (save.pw_name) {
free((char *)save.pw_name);
memset(save.pw_passwd, 0, strlen(save.pw_passwd));
free((char *)save.pw_passwd);
free((char *)save.pw_gecos);
free((char *)save.pw_dir);
free((char *)save.pw_shell);
}
save = *p;
save.pw_name = xstrdup(p->pw_name);
save.pw_passwd = xstrdup(p->pw_passwd);
save.pw_gecos = xstrdup(p->pw_gecos);
save.pw_dir = xstrdup(p->pw_dir);
save.pw_shell = xstrdup(p->pw_shell);
return (&save);
}
static int login_attempts; /* number of failed login attempts */
static int askpasswd; /* had user command, ask for passwd */
static char curname[10]; /* current USER name */
/*
* USER command.
* Sets global passwd pointer pw if named account exists and is acceptable;
* sets askpasswd if a PASS command is expected. If logged in previously,
* need to reset state. If name is "ftp" or "anonymous", the name is not in
* _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
* If account doesn't exist, ask for passwd anyway. Otherwise, check user
* requesting login privileges. Disallow anyone who does not have a standard
* shell as returned by getusershell(). Disallow anyone mentioned in the file
* _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
*/
void
user(name)
const char *name;
{
if (logged_in) {
switch (curclass.type) {
case CLASS_GUEST:
reply(530, "Can't change user from guest login.");
return;
case CLASS_CHROOT:
reply(530, "Can't change user from chroot user.");
return;
case CLASS_REAL:
end_login();
break;
default:
abort();
}
}
#if defined(KERBEROS) || defined(KERBEROS5)
kdestroy();
#endif
curclass.type = CLASS_REAL;
if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
/* need `pw' setup for checkaccess() and checkuser () */
if ((pw = sgetpwnam("ftp")) == NULL)
reply(530, "User %s unknown.", name);
else if (! checkaccess("ftp") || ! checkaccess("anonymous"))
reply(530, "User %s access denied.", name);
else {
curclass.type = CLASS_GUEST;
askpasswd = 1;
reply(331,
"Guest login ok, type your name as password.");
}
if (!askpasswd && logging)
syslog(LOG_NOTICE,
"ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost);
return;
}
pw = sgetpwnam(name);
if (logging)
strlcpy(curname, name, sizeof(curname));
#ifdef SKEY
if (skey_haskey(name) == 0) {
char *myskey;
myskey = skey_keyinfo(name);
reply(331, "Password [%s] required for %s.",
myskey ? myskey : "error getting challenge", name);
} else
#endif
reply(331, "Password required for %s.", name);
askpasswd = 1;
/*
* Delay before reading passwd after first failed
* attempt to slow down passwd-guessing programs.
*/
if (login_attempts)
sleep((unsigned) login_attempts);
}
/*
* Determine whether something is to happen (allow access, chroot)
* for a user. Each line is a shell-style glob followed by
* `yes' or `no'.
*
* For backward compatability, `allow' and `deny' are synonymns
* for `yes' and `no', respectively.
*
* Each glob is matched against the username in turn, and the first
* match found is used. If no match is found, the result is the
* argument `def'. If a match is found but without and explicit
* `yes'/`no', the result is the opposite of def.
*
* If the file doesn't exist at all, the result is the argument
* `nofile'
*
* Any line starting with `#' is considered a comment and ignored.
*
* Returns 0 if the user is denied, or 1 if they are allowed.
*
* NOTE: needs struct passwd *pw setup before use.
*/
int
checkuser(fname, name, def, nofile, retclass)
const char *fname, *name;
int def, nofile;
char **retclass;
{
FILE *fd;
int retval;
char *glob, *perm, *class, *buf, *p;
size_t len, line;
retval = def;
if (retclass != NULL)
*retclass = NULL;
if ((fd = fopen(conffilename(fname), "r")) == NULL)
return nofile;
line = 0;
for (;
(buf = fparseln(fd, &len, &line, NULL, FPARSELN_UNESCCOMM |
FPARSELN_UNESCCONT | FPARSELN_UNESCESC)) != NULL;
free(buf), buf = NULL) {
glob = perm = class = NULL;
p = buf;
if (len < 1)
continue;
if (p[len - 1] == '\n')
p[--len] = '\0';
if (EMPTYSTR(p))
continue;
NEXTWORD(p, glob);
NEXTWORD(p, perm);
NEXTWORD(p, class);
if (EMPTYSTR(glob))
continue;
if (!EMPTYSTR(class)) {
if (strcasecmp(class, "all") == 0 ||
strcasecmp(class, "none") == 0) {
syslog(LOG_WARNING,
"%s line %d: illegal user-defined class `%s' - skipping entry",
fname, (int)line, class);
continue;
}
}
/* have a host specifier */
if ((p = strchr(glob, '@')) != NULL) {
u_int32_t net, mask, addr;
int bits;
*p++ = '\0';
/* check against network or CIDR */
if (isdigit(*p) &&
(bits = inet_net_pton(AF_INET, p,
&net, sizeof(net))) != -1) {
net = ntohl(net);
mask = 0xffffffffU << (32 - bits);
addr = ntohl(his_addr.su_sin.sin_addr.s_addr);
if ((addr & mask) != net)
continue;
/* check against hostname glob */
} else if (fnmatch(p, remotehost, 0) != 0)
continue;
}
/* have a group specifier */
if ((p = strchr(glob, ':')) != NULL) {
gid_t *groups, *ng;
int gsize, i, found;
*p++ = '\0';
groups = NULL;
gsize = 16;
do {
ng = realloc(groups, gsize * sizeof(gid_t));
if (ng == NULL)
fatal(
"Local resource failure: realloc");
groups = ng;
} while (getgrouplist(pw->pw_name, pw->pw_gid,
groups, &gsize) == -1);
found = 0;
for (i = 0; i < gsize; i++) {
struct group *g;
if ((g = getgrgid(groups[i])) == NULL)
continue;
if (fnmatch(p, g->gr_name, 0) == 0) {
found = 1;
break;
}
}
free(groups);
if (!found)
continue;
}
/* check against username glob */
if (fnmatch(glob, name, 0) != 0)
continue;
if (perm != NULL &&
((strcasecmp(perm, "allow") == 0) ||
(strcasecmp(perm, "yes") == 0)))
retval = 1;
else if (perm != NULL &&
((strcasecmp(perm, "deny") == 0) ||
(strcasecmp(perm, "no") == 0)))
retval = 0;
else
retval = !def;
if (!EMPTYSTR(class) && retclass != NULL)
*retclass = xstrdup(class);
free(buf);
break;
}
(void) fclose(fd);
return (retval);
}
/*
* Check if user is allowed by /etc/ftpusers
* returns 1 for yes, 0 for no
*
* NOTE: needs struct passwd *pw setup (for checkuser())
*/
int
checkaccess(name)
const char *name;
{
return (checkuser(_PATH_FTPUSERS, name, 1, 0, NULL));
}
/*
* Terminate login as previous user, if any, resetting state;
* used when USER command is given or login fails.
*/
static void
end_login()
{
(void) seteuid((uid_t)0);
if (logged_in) {
logwtmp(ttyline, "", "");
if (doutmp)
logout(utmp.ut_line);
}
pw = NULL;
logged_in = 0;
quietmessages = 0;
curclass.type = CLASS_REAL;
}
void
pass(passwd)
const char *passwd;
{
int rval;
const char *cp, *shell, *home;
char *class;
class = NULL;
if (logged_in || askpasswd == 0) {
reply(503, "Login with USER first.");
return;
}
askpasswd = 0;
if (curclass.type != CLASS_GUEST) {
/* "ftp" is only account allowed no password */
if (pw == NULL) {
rval = 1; /* failure below */
goto skip;
}
#if defined(KERBEROS) || defined(KERBEROS5)
if (klogin(pw, "", hostname, (char *)passwd) == 0) {
rval = 0;
goto skip;
}
#endif
#ifdef SKEY
if (skey_haskey(pw->pw_name) == 0) {
char *p;
int r;
p = xstrdup(passwd);
r = skey_passcheck(pw->pw_name, p);
free(p);
if (r != -1) {
rval = 0;
goto skip;
}
}
#endif
if (!sflag && *pw->pw_passwd != '\0' &&
!strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd)) {
rval = 0;
goto skip;
}
rval = 1;
skip:
if (pw != NULL && pw->pw_expire && time(NULL) >= pw->pw_expire)
rval = 2;
/*
* If rval > 0, the user failed the authentication check
* above. If rval == 0, either Kerberos or local authentication
* succeeded.
*/
if (rval) {
reply(530, rval == 2 ? "Password expired." :
"Login incorrect.");
if (logging) {
syslog(LOG_NOTICE,
"FTP LOGIN FAILED FROM %s", remotehost);
syslog(LOG_AUTHPRIV | LOG_NOTICE,
"FTP LOGIN FAILED FROM %s, %s",
remotehost, curname);
}
pw = NULL;
if (login_attempts++ >= 5) {
syslog(LOG_NOTICE,
"repeated login failures from %s",
remotehost);
exit(0);
}
return;
}
}
/* password was ok; see if anything else prevents login */
if (! checkuser(_PATH_FTPUSERS, pw->pw_name, 1, 0, &class)) {
reply(530, "User %s may not use FTP.", pw->pw_name);
if (logging)
syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s",
remotehost, pw->pw_name);
goto bad;
}
/* check for valid shell, if not guest user */
if ((shell = pw->pw_shell) == NULL || *shell == 0)
shell = _PATH_BSHELL;
while ((cp = getusershell()) != NULL)
if (strcmp(cp, shell) == 0)
break;
endusershell();
if (cp == NULL && curclass.type != CLASS_GUEST) {
reply(530, "User %s may not use FTP.", pw->pw_name);
if (logging)
syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s",
remotehost, pw->pw_name);
goto bad;
}
login_attempts = 0; /* this time successful */
if (setegid((gid_t)pw->pw_gid) < 0) {
reply(550, "Can't set gid.");
goto bad;
}
(void) initgroups(pw->pw_name, pw->pw_gid);
/* open wtmp before chroot */
logwtmp(ttyline, pw->pw_name, remotehost);
/* open utmp before chroot */
if (doutmp) {
memset((void *)&utmp, 0, sizeof(utmp));
(void)time(&utmp.ut_time);
(void)strncpy(utmp.ut_name, pw->pw_name, sizeof(utmp.ut_name));
(void)strncpy(utmp.ut_host, remotehost, sizeof(utmp.ut_host));
(void)strncpy(utmp.ut_line, ttyline, sizeof(utmp.ut_line));
login(&utmp);
}
logged_in = 1;
/* check user in /etc/ftpchroot */
if (checkuser(_PATH_FTPCHROOT, pw->pw_name, 0, 0, NULL)) {
if (curclass.type == CLASS_GUEST) {
syslog(LOG_NOTICE,
"Can't change guest user to chroot class; remove entry in %s",
_PATH_FTPCHROOT);
exit(1);
}
curclass.type = CLASS_CHROOT;
}
if (class == NULL) {
switch (curclass.type) {
case CLASS_GUEST:
class = xstrdup("guest");
break;
case CLASS_CHROOT:
class = xstrdup("chroot");
break;
case CLASS_REAL:
class = xstrdup("real");
break;
default:
abort();
}
}
/* parse ftpd.conf, setting up various parameters */
parse_conf(class);
count_users();
if (curclass.limit != -1 && connections > curclass.limit) {
if (! EMPTYSTR(curclass.limitfile))
(void)format_file(conffilename(curclass.limitfile),530);
reply(530,
"User %s access denied, connection limit of %d reached.",
pw->pw_name, curclass.limit);
syslog(LOG_NOTICE,
"Maximum connection limit of %d for class %s reached, login refused",
curclass.limit, curclass.classname);
goto bad;
}
home = "/";
switch (curclass.type) {
case CLASS_GUEST:
/*
* We MUST do a chdir() after the chroot. Otherwise
* the old current directory will be accessible as "."
* outside the new root!
*/
if (chroot(anondir ? anondir : pw->pw_dir) < 0 ||
chdir("/") < 0) {
reply(550, "Can't set guest privileges.");
goto bad;
}
break;
case CLASS_CHROOT:
if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
reply(550, "Can't change root.");
goto bad;
}
break;
case CLASS_REAL:
if (chdir(pw->pw_dir) < 0) {
if (chdir("/") < 0) {
reply(530,
"User %s: can't change directory to %s.",
pw->pw_name, pw->pw_dir);
goto bad;
} else
lreply(230,
"No directory! Logging in with home=/");
} else
home = pw->pw_dir;
break;
}
if (seteuid((uid_t)pw->pw_uid) < 0) {
reply(550, "Can't set uid.");
goto bad;
}
setenv("HOME", home, 1);
if (curclass.type == CLASS_GUEST && passwd[0] == '-')
quietmessages = 1;
/*
* Display a login message, if it exists.
* N.B. reply(230,) must follow the message.
*/
(void)format_file(conffilename(curclass.motd), 230);
show_chdir_messages(230);
if (curclass.type == CLASS_GUEST) {
reply(230, "Guest login ok, access restrictions apply.");
#ifdef HASSETPROCTITLE
snprintf(proctitle, sizeof(proctitle),
"%s: anonymous/%.*s", remotehost,
(int) (sizeof(proctitle) - sizeof(remotehost) -
sizeof(": anonymous/")), passwd);
setproctitle(proctitle);
#endif /* HASSETPROCTITLE */
if (logging)
syslog(LOG_INFO,
"ANONYMOUS FTP LOGIN FROM %s, %s (class: %s, type: %s)",
remotehost, passwd,
curclass.classname, CURCLASSTYPE);
} else {
reply(230, "User %s logged in.", pw->pw_name);
#ifdef HASSETPROCTITLE
snprintf(proctitle, sizeof(proctitle),
"%s: %s", remotehost, pw->pw_name);
setproctitle(proctitle);
#endif /* HASSETPROCTITLE */
if (logging)
syslog(LOG_INFO,
"FTP LOGIN FROM %s as %s (class: %s, type: %s)",
remotehost, pw->pw_name,
curclass.classname, CURCLASSTYPE);
}
(void) umask(curclass.umask);
goto cleanuppass;
bad:
/* Forget all about it... */
end_login();
cleanuppass:
if (class)
free(class);
}
void
retrieve(argv, name)
char *argv[];
const char *name;
{
FILE *fin = NULL, *dout;
struct stat st;
int (*closefunc) __P((FILE *)) = NULL;
int log, sendrv, closerv, stderrfd, isconversion, isdata, isls;
struct timeval start, finish, td, *tdp;
const char *dispname;
sendrv = closerv = stderrfd = -1;
isconversion = isdata = isls = log = 0;
tdp = NULL;
dispname = name;
if (argv == NULL) {
log = 1;
isdata = 1;
fin = fopen(name, "r");
closefunc = fclose;
if (fin == NULL)
argv = do_conversion(name);
if (argv != NULL) {
isconversion++;
syslog(LOG_INFO, "get command: '%s' on '%s'",
argv[0], name);
}
}
if (argv != NULL) {
char temp[MAXPATHLEN];
if (strcmp(argv[0], INTERNAL_LS) == 0) {
isls = 1;
stderrfd = -1;
} else {
(void)snprintf(temp, sizeof(temp), "%s", TMPFILE);
stderrfd = mkstemp(temp);
if (stderrfd != -1)
(void)unlink(temp);
}
dispname = argv[0];
fin = ftpd_popen(argv, "r", stderrfd);
closefunc = ftpd_pclose;
st.st_size = -1;
st.st_blksize = BUFSIZ;
}
if (fin == NULL) {
if (errno != 0) {
perror_reply(550, dispname);
if (log)
logcmd("get", -1, name, NULL, NULL,
strerror(errno));
}
goto cleanupretrieve;
}
byte_count = -1;
if (argv == NULL
&& (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) {
reply(550, "%s: not a plain file.", dispname);
goto done;
}
if (restart_point) {
if (type == TYPE_A) {
off_t i;
int c;
for (i = 0; i < restart_point; i++) {
if ((c=getc(fin)) == EOF) {
perror_reply(550, dispname);
goto done;
}
if (c == '\n')
i++;
}
} else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
perror_reply(550, dispname);
goto done;
}
}
dout = dataconn(dispname, st.st_size, "w");
if (dout == NULL)
goto done;
(void)gettimeofday(&start, NULL);
sendrv = send_data(fin, dout, st.st_blksize, isdata);
(void)gettimeofday(&finish, NULL);
(void) fclose(dout);
timersub(&finish, &start, &td);
tdp = &td;
data = -1;
pdata = -1;
done:
if (log)
logcmd("get", byte_count, name, NULL, tdp, NULL);
closerv = (*closefunc)(fin);
if (sendrv == 0) {
FILE *err;
struct stat sb;
if (!isls && argv != NULL && closerv != 0) {
lreply(226,
"Command returned an exit status of %d",
closerv);
if (isconversion)
syslog(LOG_INFO,
"retrieve command: '%s' returned %d",
argv[0], closerv);
}
if (!isls && argv != NULL && stderrfd != -1 &&
(fstat(stderrfd, &sb) == 0) && sb.st_size > 0 &&
((err = fdopen(stderrfd, "r")) != NULL)) {
char *cp, line[LINE_MAX];
lreply(226, "Command error messages:");
rewind(err);
while (fgets(line, sizeof(line), err) != NULL) {
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
lreply(0, " %s", line);
}
(void) fflush(stdout);
(void) fclose(err);
/* a reply(226,) must follow */
}
reply(226, "Transfer complete.");
}
cleanupretrieve:
if (stderrfd != -1)
(void)close(stderrfd);
if (isconversion)
free(argv);
}
void
store(name, mode, unique)
const char *name, *mode;
int unique;
{
FILE *fout, *din;
struct stat st;
int (*closefunc) __P((FILE *));
struct timeval start, finish, td, *tdp;
char *desc;
desc = (*mode == 'w') ? "put" : "append";
if (unique && stat(name, &st) == 0 &&
(name = gunique(name)) == NULL) {
logcmd(desc, -1, name, NULL, NULL, "cannot create unique file");
return;
}
if (restart_point)
mode = "r+";
fout = fopen(name, mode);
closefunc = fclose;
tdp = NULL;
if (fout == NULL) {
perror_reply(553, name);
logcmd(desc, -1, name, NULL, NULL, strerror(errno));
return;
}
byte_count = -1;
if (restart_point) {
if (type == TYPE_A) {
off_t i;
int c;
for (i = 0; i < restart_point; i++) {
if ((c=getc(fout)) == EOF) {
perror_reply(550, name);
goto done;
}
if (c == '\n')
i++;
}
/*
* We must do this seek to "current" position
* because we are changing from reading to
* writing.
*/
if (fseek(fout, 0L, SEEK_CUR) < 0) {
perror_reply(550, name);
goto done;
}
} else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
perror_reply(550, name);
goto done;
}
}
din = dataconn(name, (off_t)-1, "r");
if (din == NULL)
goto done;
(void)gettimeofday(&start, NULL);
if (receive_data(din, fout) == 0) {
if (unique)
reply(226, "Transfer complete (unique file name:%s).",
name);
else
reply(226, "Transfer complete.");
}
(void)gettimeofday(&finish, NULL);
(void) fclose(din);
timersub(&finish, &start, &td);
tdp = &td;
data = -1;
pdata = -1;
done:
logcmd(desc, byte_count, name, NULL, tdp, NULL);
(*closefunc)(fout);
}
static FILE *
getdatasock(mode)
const char *mode;
{
int on = 1, s, t, tries;
if (data >= 0)
return (fdopen(data, mode));
(void) seteuid((uid_t)0);
s = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
if (s < 0)
goto bad;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
(char *) &on, sizeof(on)) < 0)
goto bad;
if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
(char *) &on, sizeof(on)) < 0)
goto bad;
/* anchor socket to avoid multi-homing problems */
data_source = ctrl_addr;
data_source.su_port = htons(20); /* ftp-data port */
for (tries = 1; ; tries++) {
if (bind(s, (struct sockaddr *)&data_source,
data_source.su_len) >= 0)
break;
if (errno != EADDRINUSE || tries > 10)
goto bad;
sleep(tries);
}
(void) seteuid((uid_t)pw->pw_uid);
#ifdef IP_TOS
if (!mapped && ctrl_addr.su_family == AF_INET) {
on = IPTOS_THROUGHPUT;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on,
sizeof(int)) < 0)
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
}
#endif
return (fdopen(s, mode));
bad:
/* Return the real value of errno (close may change it) */
t = errno;
(void) seteuid((uid_t)pw->pw_uid);
(void) close(s);
errno = t;
return (NULL);
}
static FILE *
dataconn(name, size, mode)
const char *name;
off_t size;
const char *mode;
{
char sizebuf[32];
FILE *file;
int retry = 0, tos, keepalive;
file_size = size;
byte_count = 0;
if (size != (off_t) -1)
(void)snprintf(sizebuf, sizeof(sizebuf), " (%qd byte%s)",
(qdfmt_t)size, PLURAL(size));
else
sizebuf[0] = '\0';
if (pdata >= 0) {
union sockunion from;
int s, fromlen = sizeof(from);
(void) alarm(curclass.timeout);
s = accept(pdata, (struct sockaddr *)&from, &fromlen);
(void) alarm(0);
if (s < 0) {
reply(425, "Can't open data connection.");
(void) close(pdata);
pdata = -1;
return (NULL);
}
(void) close(pdata);
pdata = s;
switch (from.su_family) {
case AF_INET:
#ifdef IP_TOS
if (!mapped) {
tos = IPTOS_THROUGHPUT;
(void) setsockopt(s, IPPROTO_IP, IP_TOS,
(char *)&tos, sizeof(int));
}
break;
#endif
}
/* Set keepalives on the socket to detect dropped conns. */
#ifdef SO_KEEPALIVE
keepalive = 1;
(void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
(char *)&keepalive, sizeof(int));
#endif
reply(150, "Opening %s mode data connection for '%s'%s.",
type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
return (fdopen(pdata, mode));
}
if (data >= 0) {
reply(125, "Using existing data connection for '%s'%s.",
name, sizebuf);
usedefault = 1;
return (fdopen(data, mode));
}
if (usedefault)
data_dest = his_addr;
usedefault = 1;
file = getdatasock(mode);
if (file == NULL) {
char hbuf[INET6_ADDRSTRLEN];
char pbuf[10];
getnameinfo((struct sockaddr *)&data_source, data_source.su_len,
hbuf, sizeof(hbuf), pbuf, sizeof(pbuf),
NI_NUMERICHOST | NI_NUMERICSERV);
reply(425, "Can't create data socket (%s,%s): %s.",
hbuf, pbuf, strerror(errno));
return (NULL);
}
data = fileno(file);
while (connect(data, (struct sockaddr *)&data_dest,
data_dest.su_len) < 0) {
if (errno == EADDRINUSE && retry < swaitmax) {
sleep((unsigned) swaitint);
retry += swaitint;
continue;
}
perror_reply(425, "Can't build data connection");
(void) fclose(file);
data = -1;
return (NULL);
}
reply(150, "Opening %s mode data connection for '%s'%s.",
type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
return (file);
}
/*
* Tranfer the contents of "instr" to "outstr" peer using the appropriate
* encapsulation of the data subject * to Mode, Structure, and Type.
*
* NB: Form isn't handled.
*/
static int
send_data(instr, outstr, blksize, isdata)
FILE *instr, *outstr;
off_t blksize;
int isdata;
{
int c, filefd, netfd, rval;
char *buf;
transflag = 1;
rval = -1;
buf = NULL;
if (setjmp(urgcatch))
goto cleanup_send_data;
switch (type) {
case TYPE_A:
/* XXXX: rate limit ascii send (get) */
(void) alarm(curclass.timeout);
while ((c = getc(instr)) != EOF) {
byte_count++;
if (c == '\n') {
if (ferror(outstr))
goto data_err;
(void) putc('\r', outstr);
if (isdata) {
total_data_out++;
total_data++;
}
total_bytes_out++;
total_bytes++;
}
(void) putc(c, outstr);
if (isdata) {
total_data_out++;
total_data++;
}
total_bytes_out++;
total_bytes++;
if ((byte_count % 4096) == 0)
(void) alarm(curclass.timeout);
}
(void) alarm(0);
fflush(outstr);
if (ferror(instr))
goto file_err;
if (ferror(outstr))
goto data_err;
rval = 0;
goto cleanup_send_data;
case TYPE_I:
case TYPE_L:
if ((buf = malloc((size_t)blksize)) == NULL) {
perror_reply(451, "Local resource failure: malloc");
goto cleanup_send_data;
}
filefd = fileno(instr);
netfd = fileno(outstr);
(void) alarm(curclass.timeout);
if (curclass.rateget) {
while (1) {
int d;
struct timeval then, now, td;
off_t bufrem;
char *bufp;
(void)gettimeofday(&then, NULL);
errno = c = d = 0;
bufrem = curclass.rateget;
while (bufrem > 0) {
if ((c = read(filefd, buf,
MIN(blksize, bufrem))) <= 0)
goto senddone;
(void) alarm(curclass.timeout);
bufrem -= c;
byte_count += c;
if (isdata) {
total_data_out += c;
total_data += c;
}
total_bytes_out += c;
total_bytes += c;
for (bufp = buf; c > 0;
c -= d, bufp += d)
if ((d =
write(netfd, bufp, c)) <= 0)
break;
if (d < 0)
goto data_err;
}
(void)gettimeofday(&now, NULL);
timersub(&now, &then, &td);
if (td.tv_sec > 0)
break;
usleep(1000000 - td.tv_usec);
}
} else {
while ((c = read(filefd, buf, (size_t)blksize)) > 0) {
if (write(netfd, buf, c) != c)
goto data_err;
(void) alarm(curclass.timeout);
byte_count += c;
if (isdata) {
total_data_out += c;
total_data += c;
}
total_bytes_out += c;
total_bytes += c;
}
}
senddone:
if (c < 0)
goto file_err;
rval = 0;
goto cleanup_send_data;
default:
reply(550, "Unimplemented TYPE %d in send_data", type);
goto cleanup_send_data;
}
data_err:
(void) alarm(0);
perror_reply(426, "Data connection");
goto cleanup_send_data;
file_err:
(void) alarm(0);
perror_reply(551, "Error on input file");
/* FALLTHROUGH */
cleanup_send_data:
(void) alarm(0);
transflag = 0;
if (buf)
free(buf);
if (isdata) {
total_files_out++;
total_files++;
}
total_xfers_out++;
total_xfers++;
return (rval);
}
/*
* Transfer data from peer to "outstr" using the appropriate encapulation of
* the data subject to Mode, Structure, and Type.
*
* N.B.: Form isn't handled.
*/
static int
receive_data(instr, outstr)
FILE *instr, *outstr;
{
int c, bare_lfs, netfd, filefd, rval;
char buf[BUFSIZ];
#ifdef __GNUC__
(void) &bare_lfs;
#endif
bare_lfs = 0;
transflag = 1;
rval = -1;
if (setjmp(urgcatch))
goto cleanup_recv_data;
switch (type) {
case TYPE_I:
case TYPE_L:
netfd = fileno(instr);
filefd = fileno(outstr);
(void) alarm(curclass.timeout);
if (curclass.rateput) {
while (1) {
int d;
struct timeval then, now, td;
off_t bufrem;
(void)gettimeofday(&then, NULL);
errno = c = d = 0;
for (bufrem = curclass.rateput; bufrem > 0; ) {
if ((c = read(netfd, buf,
MIN(sizeof(buf), bufrem))) <= 0)
goto recvdone;
if ((d = write(filefd, buf, c)) != c)
goto recvdone;
(void) alarm(curclass.timeout);
bufrem -= c;
byte_count += c;
total_data_in += c;
total_data += c;
total_bytes_in += c;
total_bytes += c;
}
(void)gettimeofday(&now, NULL);
timersub(&now, &then, &td);
if (td.tv_sec > 0)
break;
usleep(1000000 - td.tv_usec);
}
} else {
while ((c = read(netfd, buf, sizeof(buf))) > 0) {
if (write(filefd, buf, c) != c)
goto file_err;
(void) alarm(curclass.timeout);
byte_count += c;
total_data_in += c;
total_data += c;
total_bytes_in += c;
total_bytes += c;
}
}
recvdone:
if (c < 0)
goto data_err;
rval = 0;
goto cleanup_recv_data;
case TYPE_E:
reply(553, "TYPE E not implemented.");
goto cleanup_recv_data;
case TYPE_A:
(void) alarm(curclass.timeout);
/* XXXX: rate limit ascii receive (put) */
while ((c = getc(instr)) != EOF) {
byte_count++;
total_data_in++;
total_data++;
total_bytes_in++;
total_bytes++;
if ((byte_count % 4096) == 0)
(void) alarm(curclass.timeout);
if (c == '\n')
bare_lfs++;
while (c == '\r') {
if (ferror(outstr))
goto data_err;
if ((c = getc(instr)) != '\n') {
byte_count++;
total_data_in++;
total_data++;
total_bytes_in++;
total_bytes++;
if ((byte_count % 4096) == 0)
(void) alarm(curclass.timeout);
(void) putc ('\r', outstr);
if (c == '\0' || c == EOF)
goto contin2;
}
}
(void) putc(c, outstr);
contin2: ;
}
(void) alarm(0);
fflush(outstr);
if (ferror(instr))
goto data_err;
if (ferror(outstr))
goto file_err;
if (bare_lfs) {
lreply(226,
"WARNING! %d bare linefeeds received in ASCII mode",
bare_lfs);
lreply(0, "File may not have transferred correctly.");
}
rval = 0;
goto cleanup_recv_data;
default:
reply(550, "Unimplemented TYPE %d in receive_data", type);
goto cleanup_recv_data;
}
data_err:
(void) alarm(0);
perror_reply(426, "Data Connection");
goto cleanup_recv_data;
file_err:
(void) alarm(0);
perror_reply(452, "Error writing file");
goto cleanup_recv_data;
cleanup_recv_data:
(void) alarm(0);
transflag = 0;
total_files_in++;
total_files++;
total_xfers_in++;
total_xfers++;
return (rval);
}
void
statfilecmd(filename)
const char *filename;
{
FILE *fin;
int c;
char *argv[] = { INTERNAL_LS, "-lgA", "", NULL };
argv[2] = (char *)filename;
fin = ftpd_popen(argv, "r", STDOUT_FILENO);
lreply(211, "status of %s:", filename);
while ((c = getc(fin)) != EOF) {
if (c == '\n') {
if (ferror(stdout)){
perror_reply(421, "control connection");
(void) ftpd_pclose(fin);
dologout(1);
/* NOTREACHED */
}
if (ferror(fin)) {
perror_reply(551, filename);
(void) ftpd_pclose(fin);
return;
}
(void) putchar('\r');
total_bytes++;
total_bytes_out++;
}
(void) putchar(c);
total_bytes++;
total_bytes_out++;
}
(void) ftpd_pclose(fin);
reply(211, "End of Status");
}
void
statcmd()
{
union sockunion *su = NULL;
static char ntop_buf[INET6_ADDRSTRLEN];
u_char *a, *p;
int ispassive;
off_t b, otbi, otbo, otb;
a = p = (u_char *)NULL;
lreply(211, "%s FTP server status:", hostname);
lreply(0, "Version: %s", FTPD_VERSION);
ntop_buf[0] = '\0';
if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
ntop_buf, sizeof(ntop_buf), NULL, 0, NI_NUMERICHOST)
&& strcmp(remotehost, ntop_buf) != 0) {
lreply(0, "Connected to %s (%s)", remotehost, ntop_buf);
} else
lreply(0, "Connected to %s", remotehost);
if (logged_in) {
if (curclass.type == CLASS_GUEST)
lreply(0, "Logged in anonymously");
else
lreply(0, "Logged in as %s%s", pw->pw_name,
curclass.type == CLASS_CHROOT ? " (chroot)" : "");
} else if (askpasswd)
lreply(0, "Waiting for password");
else
lreply(0, "Waiting for user name");
b = printf(" TYPE: %s", typenames[type]);
total_bytes += b;
total_bytes_out += b;
if (type == TYPE_A || type == TYPE_E) {
b = printf(", FORM: %s", formnames[form]);
total_bytes += b;
total_bytes_out += b;
}
if (type == TYPE_L) {
#if NBBY == 8
b = printf(" %d", NBBY);
#else
/* XXX: `bytesize' needs to be defined in this case */
b = printf(" %d", bytesize);
#endif
total_bytes += b;
total_bytes_out += b;
}
b = printf("; STRUcture: %s; transfer MODE: %s\r\n",
strunames[stru], modenames[mode]);
total_bytes += b;
total_bytes_out += b;
ispassive = 0;
if (data != -1) {
lreply(0, "Data connection open");
su = NULL;
} else if (pdata != -1) {
b = printf(" in Passive mode");
total_bytes += b;
total_bytes_out += b;
su = (union sockunion *)&pasv_addr;
ispassive = 1;
goto printaddr;
} else if (usedefault == 0) {
if (epsvall) {
b = printf("211- EPSV only mode (EPSV ALL )\r\n");
total_bytes += b;
total_bytes_out += b;
goto epsvonly;
}
b = printf("211- %s",
(data_dest.su_family == AF_INET) ? "PORT" : "LPRT");
total_bytes += b;
total_bytes_out += b;
su = (union sockunion *)&data_dest;
printaddr:
/* PASV/PORT */
if (su->su_family == AF_INET) {
if (ispassive)
b = printf("211- PASV ");
else
b = printf("211- PORT ");
a = (u_char *) &su->su_sin.sin_addr;
p = (u_char *) &su->su_sin.sin_port;
#define UC(b) (((int) b) & 0xff)
b += printf("(%d,%d,%d,%d,%d,%d)\r\n",
UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
UC(p[0]), UC(p[1]));
total_bytes += b;
total_bytes_out += b;
}
/* LPSV/LPRT */
{
int alen, af, i;
alen = 0;
switch (su->su_family) {
case AF_INET:
a = (u_char *) &su->su_sin.sin_addr;
p = (u_char *) &su->su_sin.sin_port;
alen = sizeof(su->su_sin.sin_addr);
af = 4;
break;
case AF_INET6:
a = (u_char *) &su->su_sin6.sin6_addr;
p = (u_char *) &su->su_sin6.sin6_port;
alen = sizeof(su->su_sin6.sin6_addr);
af = 6;
break;
default:
af = 0;
break;
}
if (af) {
if (ispassive)
b = printf("211- LPSV ");
else
b = printf("211- LPRT ");
printf("(%d,%d", af, alen);
for (i = 0; i < alen; i++)
b += printf("%d,", UC(a[alen]));
b += printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1]));
total_bytes += b;
total_bytes_out += b;
#undef UC
}
}
/* EPRT/EPSV */
epsvonly:;
{
int af;
switch (su->su_family) {
case AF_INET:
af = 1;
break;
case AF_INET6:
af = 2;
break;
default:
af = 0;
break;
}
if (af) {
if (getnameinfo((struct sockaddr *)su, su->su_len,
ntop_buf, sizeof(ntop_buf), NULL, 0,
NI_NUMERICHOST) == 0) {
if (ispassive)
b = printf("211 - EPSV ");
else
b = printf("211 - EPRT ");
b += printf("(|%d|%s|%d|)\r\n",
af, ntop_buf, ntohs(su->su_port));
total_bytes += b;
total_bytes_out += b;
}
}
}
} else
lreply(0, "No data connection");
if (logged_in) {
lreply(0, "Data sent: %qd byte%s in %qd file%s",
(qdfmt_t)total_data_out, PLURAL(total_data_out),
(qdfmt_t)total_files_out, PLURAL(total_files_out));
lreply(0, "Data received: %qd byte%s in %qd file%s",
(qdfmt_t)total_data_in, PLURAL(total_data_in),
(qdfmt_t)total_files_in, PLURAL(total_files_in));
lreply(0, "Total data: %qd byte%s in %qd file%s",
(qdfmt_t)total_data, PLURAL(total_data),
(qdfmt_t)total_files, PLURAL(total_files));
}
otbi = total_bytes_in;
otbo = total_bytes_out;
otb = total_bytes;
lreply(0, "Traffic sent: %qd byte%s in %qd transfer%s",
(qdfmt_t)otbo, PLURAL(otbo),
(qdfmt_t)total_xfers_out, PLURAL(total_xfers_out));
lreply(0, "Traffic received: %qd byte%s in %qd transfer%s",
(qdfmt_t)otbi, PLURAL(otbi),
(qdfmt_t)total_xfers_in, PLURAL(total_xfers_in));
lreply(0, "Total traffic: %qd byte%s in %qd transfer%s",
(qdfmt_t)otb, PLURAL(otb),
(qdfmt_t)total_xfers, PLURAL(total_xfers));
if (logged_in) {
struct ftpconv *cp;
lreply(0, "");
lreply(0, "Class: %s, type: %s",
curclass.classname, CURCLASSTYPE);
lreply(0, "Check PORT/LPRT commands: %sabled",
curclass.checkportcmd ? "en" : "dis");
if (curclass.display != NULL)
lreply(0, "Display file: %s", curclass.display);
if (curclass.notify != NULL)
lreply(0, "Notify fileglob: %s", curclass.notify);
lreply(0, "Idle timeout: %d, maximum timeout: %d",
curclass.timeout, curclass.maxtimeout);
lreply(0, "Current connections: %d", connections);
if (curclass.limit == -1)
lreply(0, "Maximum connections: unlimited");
else
lreply(0, "Maximum connections: %d", curclass.limit);
if (curclass.limitfile)
lreply(0, "Connection limit exceeded file: %s",
curclass.limitfile);
if (curclass.motd != NULL)
lreply(0, "MotD file: %s", curclass.motd);
lreply(0,
"Modify commands (CHMOD, DELE, MKD, RMD, RNFR, UMASK): %sabled",
curclass.modify ? "en" : "dis");
lreply(0,
"Upload commands (APPE, STOR, STOU): %sabled",
curclass.upload ? "en" : "dis");
if (curclass.portmin && curclass.portmax)
lreply(0, "PASV port range: %d - %d",
curclass.portmin, curclass.portmax);
if (curclass.rateget)
lreply(0, "Rate get limit: %d bytes/sec",
curclass.rateget);
else
lreply(0, "Rate get limit: disabled");
if (curclass.rateput)
lreply(0, "Rate put limit: %d bytes/sec",
curclass.rateput);
else
lreply(0, "Rate put limit: disabled");
lreply(0, "Umask: %.04o", curclass.umask);
for (cp = curclass.conversions; cp != NULL; cp=cp->next) {
if (cp->suffix == NULL || cp->types == NULL ||
cp->command == NULL)
continue;
lreply(0,
"Conversion: %s [%s] disable: %s, command: %s",
cp->suffix, cp->types, cp->disable, cp->command);
}
}
reply(211, "End of status");
}
void
fatal(s)
const char *s;
{
reply(451, "Error in server: %s\n", s);
reply(221, "Closing connection due to server error.");
dologout(0);
/* NOTREACHED */
}
void
#ifdef __STDC__
reply(int n, const char *fmt, ...)
#else
reply(n, fmt, va_alist)
int n;
char *fmt;
va_dcl
#endif
{
off_t b;
va_list ap;
#ifdef __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
b = 0;
b += printf("%d ", n);
b += vprintf(fmt, ap);
b += printf("\r\n");
total_bytes += b;
total_bytes_out += b;
(void)fflush(stdout);
if (debug) {
syslog(LOG_DEBUG, "<--- %d ", n);
vsyslog(LOG_DEBUG, fmt, ap);
}
}
void
#ifdef __STDC__
lreply(int n, const char *fmt, ...)
#else
lreply(n, fmt, va_alist)
int n;
char *fmt;
va_dcl
#endif
{
off_t b;
va_list ap;
#ifdef __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
b = 0;
switch (n) {
case 0:
b += printf(" ");
case -1:
break;
default:
b += printf("%d-", n);
break;
}
b += vprintf(fmt, ap);
b += printf("\r\n");
total_bytes += b;
total_bytes_out += b;
(void)fflush(stdout);
if (debug) {
syslog(LOG_DEBUG, "<--- %d- ", n);
vsyslog(LOG_DEBUG, fmt, ap);
}
}
static void
ack(s)
const char *s;
{
reply(250, "%s command successful.", s);
}
void
delete(name)
const char *name;
{
char *p = NULL;
if (remove(name) < 0) {
p = strerror(errno);
perror_reply(550, name);
} else
ack("DELE");
logcmd("delete", -1, name, NULL, NULL, p);
}
void
cwd(path)
const char *path;
{
if (chdir(path) < 0)
perror_reply(550, path);
else {
show_chdir_messages(250);
ack("CWD");
}
}
static void
replydirname(name, message)
const char *name, *message;
{
char npath[MAXPATHLEN];
int i;
for (i = 0; *name != '\0' && i < sizeof(npath) - 1; i++, name++) {
npath[i] = *name;
if (*name == '"')
npath[++i] = '"';
}
npath[i] = '\0';
reply(257, "\"%s\" %s", npath, message);
}
void
makedir(name)
const char *name;
{
char *p = NULL;
if (mkdir(name, 0777) < 0) {
p = strerror(errno);
perror_reply(550, name);
} else
replydirname(name, "directory created.");
logcmd("mkdir", -1, name, NULL, NULL, p);
}
void
removedir(name)
const char *name;
{
char *p = NULL;
if (rmdir(name) < 0) {
p = strerror(errno);
perror_reply(550, name);
} else
ack("RMD");
logcmd("rmdir", -1, name, NULL, NULL, p);
}
void
pwd()
{
char path[MAXPATHLEN];
if (getcwd(path, sizeof(path) - 1) == NULL)
reply(550, "Can't get the current directory: %s.",
strerror(errno));
else
replydirname(path, "is the current directory.");
}
char *
renamefrom(name)
char *name;
{
struct stat st;
if (stat(name, &st) < 0) {
perror_reply(550, name);
return (NULL);
}
reply(350, "File exists, ready for destination name");
return (xstrdup(name));
}
void
renamecmd(from, to)
const char *from, *to;
{
char *p = NULL;
if (rename(from, to) < 0) {
p = strerror(errno);
perror_reply(550, "rename");
} else
ack("RNTO");
logcmd("rename", -1, from, to, NULL, p);
}
static void
dolog(who)
struct sockaddr *who;
{
getnameinfo(who, who->sa_len, remotehost, sizeof(remotehost), NULL,0,0);
#ifdef HASSETPROCTITLE
snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
setproctitle(proctitle);
#endif /* HASSETPROCTITLE */
if (logging)
syslog(LOG_INFO, "connection from %s to %s",
remotehost, hostname);
}
/*
* Record logout in wtmp file
* and exit with supplied status.
*/
void
dologout(status)
int status;
{
/*
* Prevent reception of SIGURG from resulting in a resumption
* back to the main program loop.
*/
transflag = 0;
if (logged_in) {
(void) seteuid((uid_t)0);
logwtmp(ttyline, "", "");
if (doutmp)
logout(utmp.ut_line);
#ifdef KERBEROS
if (!notickets && krbtkfile_env)
unlink(krbtkfile_env);
#endif
}
/* beware of flushing buffers after a SIGPIPE */
_exit(status);
}
static void
myoob(signo)
int signo;
{
char *cp;
/* only process if transfer occurring */
if (!transflag)
return;
cp = tmpline;
if (getline(cp, 7, stdin) == NULL) {
reply(221, "You could at least say goodbye.");
dologout(0);
}
if (strcasecmp(cp, "ABOR\r\n") == 0) {
tmpline[0] = '\0';
reply(426, "Transfer aborted. Data connection closed.");
reply(226, "Abort successful");
longjmp(urgcatch, 1);
}
if (strcasecmp(cp, "STAT\r\n") == 0) {
tmpline[0] = '\0';
if (file_size != (off_t) -1)
reply(213, "Status: %qd of %qd byte%s transferred",
(qdfmt_t)byte_count, (qdfmt_t)file_size,
PLURAL(byte_count));
else
reply(213, "Status: %qd byte%s transferred",
(qdfmt_t)byte_count, PLURAL(byte_count));
}
}
static int
bind_pasv_addr()
{
static int passiveport;
int port, len;
len = pasv_addr.su_len;
if (curclass.portmin == 0 && curclass.portmax == 0) {
pasv_addr.su_port = 0;
return (bind(pdata, (struct sockaddr *)&pasv_addr, len));
}
if (passiveport == 0) {
srand(getpid());
passiveport = rand() % (curclass.portmax - curclass.portmin)
+ curclass.portmin;
}
port = passiveport;
while (1) {
port++;
if (port > curclass.portmax)
port = curclass.portmin;
else if (port == passiveport) {
errno = EAGAIN;
return (-1);
}
pasv_addr.su_port = htons(port);
if (bind(pdata, (struct sockaddr *)&pasv_addr, len) == 0)
break;
if (errno != EADDRINUSE)
return (-1);
}
passiveport = port;
return (0);
}
/*
* Note: a response of 425 is not mentioned as a possible response to
* the PASV command in RFC959. However, it has been blessed as
* a legitimate response by Jon Postel in a telephone conversation
* with Rick Adams on 25 Jan 89.
*/
void
passive()
{
int len;
char *p, *a;
if (pdata >= 0)
close(pdata);
pdata = socket(AF_INET, SOCK_STREAM, 0);
if (pdata < 0 || !logged_in) {
perror_reply(425, "Can't open passive connection");
return;
}
pasv_addr = ctrl_addr;
if (bind_pasv_addr() < 0)
goto pasv_error;
len = pasv_addr.su_len;
if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
goto pasv_error;
if (listen(pdata, 1) < 0)
goto pasv_error;
a = (char *) &pasv_addr.su_sin.sin_addr;
p = (char *) &pasv_addr.su_port;
#define UC(b) (((int) b) & 0xff)
reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
return;
pasv_error:
(void) close(pdata);
pdata = -1;
perror_reply(425, "Can't open passive connection");
return;
}
/*
* 228 Entering Long Passive Mode (af, hal, h1, h2, h3,..., pal, p1, p2...)
* 229 Entering Extended Passive Mode (|||port|)
*/
void
long_passive(char *cmd, int pf)
{
int len;
char *p, *a;
if (!logged_in) {
syslog(LOG_NOTICE, "long passive but not logged in");
reply(503, "Login with USER first.");
return;
}
if (pf != PF_UNSPEC) {
if (ctrl_addr.su_family != pf) {
switch (ctrl_addr.su_family) {
case AF_INET:
pf = 1;
break;
case AF_INET6:
pf = 2;
break;
default:
pf = 0;
break;
}
/*
* XXX
* only EPRT/EPSV ready clients will understand this
*/
if (strcmp(cmd, "EPSV") == 0 && pf) {
reply(522, "Network protocol mismatch, "
"use (%d)", pf);
} else
reply(501, "Network protocol mismatch"); /*XXX*/
return;
}
}
if (pdata >= 0)
close(pdata);
pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
if (pdata < 0) {
perror_reply(425, "Can't open passive connection");
return;
}
pasv_addr = ctrl_addr;
if (bind_pasv_addr() < 0)
goto pasv_error;
len = pasv_addr.su_len;
if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
goto pasv_error;
if (listen(pdata, 1) < 0)
goto pasv_error;
p = (char *) &pasv_addr.su_port;
#define UC(b) (((int) b) & 0xff)
if (strcmp(cmd, "LPSV") == 0) {
switch (pasv_addr.su_family) {
case AF_INET:
a = (char *) &pasv_addr.su_sin.sin_addr;
reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)",
4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
2, UC(p[0]), UC(p[1]));
return;
case AF_INET6:
a = (char *) &pasv_addr.su_sin6.sin6_addr;
reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)",
6, 16,
UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]),
UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]),
UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]),
2, UC(p[0]), UC(p[1]));
return;
}
#undef UC
} else if (strcmp(cmd, "EPSV") == 0) {
switch (pasv_addr.su_family) {
case AF_INET:
case AF_INET6:
reply(229, "Entering Extended Passive Mode (|||%d|)",
ntohs(pasv_addr.su_port));
return;
}
} else {
/* more proper error code? */
}
pasv_error:
(void) close(pdata);
pdata = -1;
perror_reply(425, "Can't open passive connection");
return;
}
/*
* Generate unique name for file with basename "local".
* The file named "local" is already known to exist.
* Generates failure reply on error.
*
* XXX this function should under go changes similar to
* the mktemp(3)/mkstemp(3) changes.
*/
static char *
gunique(local)
const char *local;
{
static char new[MAXPATHLEN];
struct stat st;
char *cp;
int count;
cp = strrchr(local, '/');
if (cp)
*cp = '\0';
if (stat(cp ? local : ".", &st) < 0) {
perror_reply(553, cp ? local : ".");
return (NULL);
}
if (cp)
*cp = '/';
for (count = 1; count < 100; count++) {
(void)snprintf(new, sizeof(new) - 1, "%s.%d", local, count);
if (stat(new, &st) < 0)
return (new);
}
reply(452, "Unique file name cannot be created.");
return (NULL);
}
/*
* Format and send reply containing system error number.
*/
void
perror_reply(code, string)
int code;
const char *string;
{
int save_errno;
save_errno = errno;
reply(code, "%s: %s.", string, strerror(errno));
errno = save_errno;
}
static char *onefile[] = {
"",
0
};
void
send_file_list(whichf)
const char *whichf;
{
struct stat st;
DIR *dirp = NULL;
struct dirent *dir;
FILE *dout = NULL;
char **dirlist, *dirname, *p;
int simple = 0;
int freeglob = 0;
glob_t gl;
off_t b;
#ifdef __GNUC__
(void) &dout;
(void) &dirlist;
(void) &simple;
(void) &freeglob;
#endif
p = NULL;
if (strpbrk(whichf, "~{[*?") != NULL) {
int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
memset(&gl, 0, sizeof(gl));
freeglob = 1;
if (glob(whichf, flags, 0, &gl)) {
reply(550, "not found");
goto out;
} else if (gl.gl_pathc == 0) {
errno = ENOENT;
perror_reply(550, whichf);
goto out;
}
dirlist = gl.gl_pathv;
} else {
p = xstrdup(whichf);
onefile[0] = p;
dirlist = onefile;
simple = 1;
}
/* XXX: } for vi sm */
if (setjmp(urgcatch)) {
transflag = 0;
goto out;
}
while ((dirname = *dirlist++) != NULL) {
int trailingslash = 0;
if (stat(dirname, &st) < 0) {
/*
* If user typed "ls -l", etc, and the client
* used NLST, do what the user meant.
*/
/* XXX: nuke this support? */
if (dirname[0] == '-' && *dirlist == NULL &&
transflag == 0) {
char *argv[] = { INTERNAL_LS, "", NULL };
argv[1] = dirname;
retrieve(argv, dirname);
goto out;
}
perror_reply(550, whichf);
if (dout != NULL) {
(void) fclose(dout);
transflag = 0;
data = -1;
pdata = -1;
}
goto out;
}
if (S_ISREG(st.st_mode)) {
if (dout == NULL) {
dout = dataconn("file list", (off_t)-1, "w");
if (dout == NULL)
goto out;
transflag++;
}
b = fprintf(dout, "%s%s\n", dirname,
type == TYPE_A ? "\r" : "");
total_bytes += b;
total_bytes_out += b;
byte_count += strlen(dirname) + 1;
continue;
} else if (!S_ISDIR(st.st_mode))
continue;
if (dirname[strlen(dirname) - 1] == '/')
trailingslash++;
if ((dirp = opendir(dirname)) == NULL)
continue;
while ((dir = readdir(dirp)) != NULL) {
char nbuf[MAXPATHLEN];
if (dir->d_name[0] == '.' && dir->d_namlen == 1)
continue;
if (dir->d_name[0] == '.' && dir->d_name[1] == '.' &&
dir->d_namlen == 2)
continue;
(void)snprintf(nbuf, sizeof(nbuf), "%s%s%s", dirname,
trailingslash ? "" : "/", dir->d_name);
/*
* We have to do a stat to ensure it's
* not a directory or special file.
*/
/* XXX: follow RFC959 and filter out non files ? */
if (simple || (stat(nbuf, &st) == 0 &&
S_ISREG(st.st_mode))) {
char *p;
if (dout == NULL) {
dout = dataconn("file list", (off_t)-1,
"w");
if (dout == NULL)
goto out;
transflag++;
}
p = nbuf;
if (nbuf[0] == '.' && nbuf[1] == '/')
p = &nbuf[2];
b = fprintf(dout, "%s%s\n", p,
type == TYPE_A ? "\r" : "");
total_bytes += b;
total_bytes_out += b;
byte_count += strlen(nbuf) + 1;
}
}
(void) closedir(dirp);
}
if (dout == NULL)
reply(550, "No files found.");
else if (ferror(dout) != 0)
perror_reply(550, "Data connection");
else
reply(226, "Transfer complete.");
transflag = 0;
if (dout != NULL)
(void) fclose(dout);
data = -1;
pdata = -1;
out:
total_xfers++;
total_xfers_out++;
if (p)
free(p);
if (freeglob)
globfree(&gl);
}
char *
conffilename(s)
const char *s;
{
static char filename[MAXPATHLEN];
if (*s == '/')
strlcpy(filename, s, sizeof(filename));
else
(void)snprintf(filename, sizeof(filename), "%s/%s", confdir ,s);
return (filename);
}
/*
* logcmd --
* based on the arguments, syslog a message:
* if bytes != -1 "<command> <file1> = <bytes> bytes"
* else if file2 != NULL "<command> <file1> <file2>"
* else "<command> <file1>"
* if elapsed != NULL, append "in xxx.yyy seconds"
* if error != NULL, append ": " + error
*/
void
logcmd(command, bytes, file1, file2, elapsed, error)
const char *command;
off_t bytes;
const char *file1;
const char *file2;
const struct timeval *elapsed;
const char *error;
{
char buf[MAXPATHLEN * 2 + 100], realfile[MAXPATHLEN];
const char *p;
size_t len;
if (logging <=1)
return;
if ((p = realpath(file1, realfile)) == NULL) {
#if 0 /* XXX: too noisy */
syslog(LOG_WARNING, "realpath `%s' failed: %s",
realfile, strerror(errno));
#endif
p = file1;
}
len = snprintf(buf, sizeof(buf), "%s %s", command, p);
if (bytes != (off_t)-1) {
len += snprintf(buf + len, sizeof(buf) - len,
" = %qd byte%s", (qdfmt_t) bytes, PLURAL(bytes));
} else if (file2 != NULL) {
if ((p = realpath(file2, realfile)) == NULL) {
#if 0 /* XXX: too noisy */
syslog(LOG_WARNING, "realpath `%s' failed: %s",
realfile, strerror(errno));
#endif
p = file2;
}
len += snprintf(buf + len, sizeof(buf) - len, " %s", p);
}
if (elapsed != NULL) {
len += snprintf(buf + len, sizeof(buf) - len,
" in %ld.%.03d seconds", elapsed->tv_sec,
(int)(elapsed->tv_usec / 1000));
}
if (error != NULL)
len += snprintf(buf + len, sizeof(buf) - len, ": %s", error);
syslog(LOG_INFO, "%s", buf);
}
char *
xstrdup(s)
const char *s;
{
char *new = strdup(s);
if (new == NULL)
fatal("Local resource failure: malloc");
/* NOTREACHED */
return (new);
}
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