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9718fb26f95689ee6670d051cee972787de9c4a9
heimdal/appl/ftp/ftpd/ftpd.c
Assar Westerlund 18f26516eb removed bogus reset of `debug' 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@3039 ec53bebd-3082-4978-b11e-865c3cabbd6b
1997-08-17 07:26:10 +00:00

2076 lines
44 KiB
C
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/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
RCSID("$Id$");
#endif
/*
* FTP server.
*/
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if defined(HAVE_SYS_IOCTL_H) && SunOS != 4
#include <sys/ioctl.h>
#endif
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#elif defined(HAVE_SYS_TIME_H)
#include <sys/time.h>
#else
#include <time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif
#ifdef HAVE_NETINET_IP_H
#include <netinet/ip.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#define FTP_NAMES
#include <arpa/ftp.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_ARPA_TELNET_H
#include <arpa/telnet.h>
#endif
#include <ctype.h>
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#include <errno.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <glob.h>
#include <limits.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif
#include <time.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <err.h>
#include "pathnames.h"
#include "extern.h"
#include "common.h"
#include "auth.h"
#include <krb.h>
#include <kafs.h>
#include "roken.h"
#include <otp.h>
#ifdef SOCKS
#include <socks.h>
extern int LIBPREFIX(fclose) __P((FILE *));
#endif
void yyparse();
#ifndef LOG_FTP
#define LOG_FTP LOG_DAEMON
#endif
static char version[] = "Version 6.00";
extern off_t restart_point;
extern char cbuf[];
struct sockaddr_in ctrl_addr;
struct sockaddr_in data_source;
struct sockaddr_in data_dest;
struct sockaddr_in his_addr;
struct sockaddr_in pasv_addr;
int data;
jmp_buf errcatch, urgcatch;
int oobflag;
int logged_in;
struct passwd *pw;
int debug = 0;
int ftpd_timeout = 900; /* timeout after 15 minutes of inactivity */
int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
int logging;
int guest;
int dochroot;
int type;
int form;
int stru; /* avoid C keyword */
int mode;
int usedefault = 1; /* for data transfers */
int pdata = -1; /* for passive mode */
int transflag;
off_t file_size;
off_t byte_count;
#if !defined(CMASK) || CMASK == 0
#undef CMASK
#define CMASK 027
#endif
int defumask = CMASK; /* default umask value */
int guest_umask = 0777; /* Paranoia for anonymous users */
char tmpline[10240];
char hostname[MaxHostNameLen];
char remotehost[MaxHostNameLen];
static char ttyline[20];
#define AUTH_PLAIN (1 << 0) /* allow sending passwords */
#define AUTH_OTP (1 << 1) /* passwords are one-time */
#define AUTH_FTP (1 << 2) /* allow anonymous login */
static int auth_level = 0; /* Only allow kerberos login by default */
/*
* 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;
#ifdef HAVE_SETPROCTITLE
char proctitle[BUFSIZ]; /* initial part of title */
#endif /* HAVE_SETPROCTITLE */
#define LOGCMD(cmd, file) \
if (logging > 1) \
syslog(LOG_INFO,"%s %s%s", cmd, \
*(file) == '/' ? "" : curdir(), file);
#define LOGCMD2(cmd, file1, file2) \
if (logging > 1) \
syslog(LOG_INFO,"%s %s%s %s%s", cmd, \
*(file1) == '/' ? "" : curdir(), file1, \
*(file2) == '/' ? "" : curdir(), file2);
#define LOGBYTES(cmd, file, cnt) \
if (logging > 1) { \
if (cnt == (off_t)-1) \
syslog(LOG_INFO,"%s %s%s", cmd, \
*(file) == '/' ? "" : curdir(), file); \
else \
syslog(LOG_INFO, "%s %s%s = %ld bytes", \
cmd, (*(file) == '/') ? "" : curdir(), file, (long)cnt); \
}
static void ack (char *);
static void myoob (int);
static int checkuser (char *, char *);
static int checkaccess (char *);
static FILE *dataconn (char *, off_t, char *);
static void dolog (struct sockaddr_in *);
static void end_login (void);
static FILE *getdatasock (char *);
static char *gunique (char *);
static RETSIGTYPE lostconn (int);
static int receive_data (FILE *, FILE *);
static void send_data (FILE *, FILE *);
static struct passwd * sgetpwnam (char *);
static void usage(void);
static char *
curdir(void)
{
static char path[MaxPathLen+1+1]; /* path + '/' + '\0' */
if (getcwd(path, sizeof(path)-2) == NULL)
return ("");
if (path[1] != '\0') /* special case for root dir. */
strcat(path, "/");
/* For guest account, skip / since it's chrooted */
return (guest ? path+1 : path);
}
#ifndef LINE_MAX
#define LINE_MAX 1024
#endif
static int
parse_auth_level(char *str)
{
char *p;
int ret = 0;
char *foo = NULL;
for(p = strtok_r(str, ",", &foo);
p;
p = strtok_r(NULL, ",", &foo)) {
if(strcmp(p, "user") == 0)
;
else if(strcmp(p, "otp") == 0)
ret |= AUTH_PLAIN|AUTH_OTP;
else if(strcmp(p, "ftp") == 0 ||
strcmp(p, "safe") == 0)
ret |= AUTH_FTP;
else if(strcmp(p, "plain") == 0)
ret |= AUTH_PLAIN;
else if(strcmp(p, "none") == 0)
ret |= AUTH_PLAIN|AUTH_FTP;
else
warnx("bad value for -a: `%s'", p);
}
return ret;
}
/*
* Print usage and die.
*/
static void
usage (void)
{
fprintf (stderr,
"Usage: %s [-d] [-i] [-g guest_umask] [-l] [-p port]"
" [-t timeout] [-T max_timeout] [-u umask] [-v]"
" [-a auth_level] \n",
__progname);
exit (1);
}
int
main(int argc, char **argv)
{
int addrlen, ch, on = 1, tos;
char *cp, line[LINE_MAX];
FILE *fd;
int not_inetd = 0;
int port;
struct servent *sp;
char tkfile[1024];
set_progname (argv[0]);
/* detach from any tickets and tokens */
snprintf(tkfile, sizeof(tkfile),
"/tmp/ftp_%u", (unsigned)getpid());
krb_set_tkt_string(tkfile);
if(k_hasafs())
k_setpag();
sp = getservbyname("ftp", "tcp");
if(sp)
port = sp->s_port;
else
port = htons(21);
while ((ch = getopt(argc, argv, "a:dg:ilp:t:T:u:v")) != EOF) {
switch (ch) {
case 'a':
auth_level = parse_auth_level(optarg);
break;
case 'd':
debug = 1;
break;
case 'i':
not_inetd = 1;
break;
case 'g':
{
long val = 0;
val = strtol(optarg, &optarg, 8);
if (*optarg != '\0' || val < 0)
warnx("bad value for -g");
else
guest_umask = val;
break;
}
case 'l':
logging++; /* > 1 == extra logging */
break;
case 'p':
sp = getservbyname(optarg, "tcp");
if(sp)
port = sp->s_port;
else
if(isdigit(optarg[0]))
port = htons(atoi(optarg));
else
warnx("bad value for -p");
break;
case 't':
ftpd_timeout = atoi(optarg);
if (maxtimeout < ftpd_timeout)
maxtimeout = ftpd_timeout;
break;
case 'T':
maxtimeout = atoi(optarg);
if (ftpd_timeout > maxtimeout)
ftpd_timeout = maxtimeout;
break;
case 'u':
{
long val = 0;
val = strtol(optarg, &optarg, 8);
if (*optarg != '\0' || val < 0)
warnx("bad value for -u");
else
defumask = val;
break;
}
case 'v':
debug = 1;
break;
default:
usage ();
}
}
if(not_inetd)
mini_inetd (port);
/*
* 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);
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 defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
tos = IPTOS_LOWDELAY;
if (setsockopt(0, IPPROTO_IP, IP_TOS, (void *)&tos, sizeof(int)) < 0)
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
#endif
data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1);
/* set this here so it can be put in wtmp */
snprintf(ttyline, sizeof(ttyline), "ftp%u", (unsigned)getpid());
/* freopen(_PATH_DEVNULL, "w", stderr); */
signal(SIGPIPE, lostconn);
signal(SIGCHLD, SIG_IGN);
#ifdef SIGURG
if (signal(SIGURG, myoob) == SIG_ERR)
syslog(LOG_ERR, "signal: %m");
#endif
auth_init();
/* Try to handle urgent data inline */
#if defined(SO_OOBINLINE) && defined(HAVE_SETSOCKOPT)
if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (void *)&on,
sizeof(on)) < 0)
syslog(LOG_ERR, "setsockopt: %m");
#endif
#ifdef F_SETOWN
if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
syslog(LOG_ERR, "fcntl F_SETOWN: %m");
#endif
dolog(&his_addr);
/*
* Set up default state
*/
data = -1;
type = TYPE_A;
form = FORM_N;
stru = STRU_F;
mode = MODE_S;
tmpline[0] = '\0';
/* If logins are disabled, print out the message. */
if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
while (fgets(line, sizeof(line), fd) != NULL) {
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
lreply(530, "%s", line);
}
fflush(stdout);
fclose(fd);
reply(530, "System not available.");
exit(0);
}
if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) {
while (fgets(line, sizeof(line), fd) != NULL) {
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
lreply(220, "%s", line);
}
fflush(stdout);
fclose(fd);
/* reply(220,) must follow */
}
k_gethostname(hostname, sizeof(hostname));
reply(220, "%s FTP server (%s+%s) ready.", hostname,
version, krb4_version);
setjmp(errcatch);
for (;;)
yyparse();
/* NOTREACHED */
}
static RETSIGTYPE
lostconn(int signo)
{
if (debug)
syslog(LOG_DEBUG, "lost connection");
dologout(-1);
}
/*
* Helper function for sgetpwnam().
*/
static char *
sgetsave(char *s)
{
char *new = strdup(s);
if (new == NULL) {
perror_reply(421, "Local resource failure: malloc");
dologout(1);
/* NOTREACHED */
}
return new;
}
/*
* 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(char *name)
{
static struct passwd save;
struct passwd *p;
if ((p = k_getpwnam(name)) == NULL)
return (p);
if (save.pw_name) {
free(save.pw_name);
free(save.pw_passwd);
free(save.pw_gecos);
free(save.pw_dir);
free(save.pw_shell);
}
save = *p;
save.pw_name = sgetsave(p->pw_name);
save.pw_passwd = sgetsave(p->pw_passwd);
save.pw_gecos = sgetsave(p->pw_gecos);
save.pw_dir = sgetsave(p->pw_dir);
save.pw_shell = sgetsave(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 */
OtpContext otp_ctx;
/*
* 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(char *name)
{
char *cp, *shell;
if(auth_level == 0 && !auth_complete){
reply(530, "No login allowed without authorization.");
return;
}
if (logged_in) {
if (guest) {
reply(530, "Can't change user from guest login.");
return;
} else if (dochroot) {
reply(530, "Can't change user from chroot user.");
return;
}
end_login();
}
guest = 0;
if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
if ((auth_level & AUTH_FTP) == 0 ||
checkaccess("ftp") ||
checkaccess("anonymous"))
reply(530, "User %s access denied.", name);
else if ((pw = sgetpwnam("ftp")) != NULL) {
guest = 1;
defumask = guest_umask; /* paranoia for incoming */
askpasswd = 1;
reply(331, "Guest login ok, type your name as password.");
} else
reply(530, "User %s unknown.", name);
if (!askpasswd && logging)
syslog(LOG_NOTICE,
"ANONYMOUS FTP LOGIN REFUSED FROM %s(%s)",
remotehost, inet_ntoa(his_addr.sin_addr));
return;
}
if((auth_level & AUTH_PLAIN) == 0 && !auth_complete){
reply(530, "Only authorized and anonymous login allowed.");
return;
}
if ((pw = sgetpwnam(name))) {
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 || checkaccess(name)) {
reply(530, "User %s access denied.", name);
if (logging)
syslog(LOG_NOTICE,
"FTP LOGIN REFUSED FROM %s(%s), %s",
remotehost,
inet_ntoa(his_addr.sin_addr),
name);
pw = (struct passwd *) NULL;
return;
}
}
if (logging)
strncpy(curname, name, sizeof(curname)-1);
if(auth_ok())
ct->userok(name);
else {
char ss[256];
if (otp_challenge(&otp_ctx, name, ss, sizeof(ss)) == 0) {
reply(331, "Password %s for %s required.",
ss, name);
askpasswd = 1;
} else if ((auth_level & AUTH_OTP) == 0) {
reply(331, "Password required for %s.", name);
askpasswd = 1;
} else {
char *s;
if (s = otp_error (&otp_ctx))
lreply(530, "OTP: %s", s);
reply(530,
"Only authorized, anonymous and OTP "
"login allowed.");
}
}
/*
* Delay before reading passwd after first failed
* attempt to slow down passwd-guessing programs.
*/
if (login_attempts)
sleep(login_attempts);
}
/*
* Check if a user is in the file "fname"
*/
static int
checkuser(char *fname, char *name)
{
FILE *fd;
int found = 0;
char *p, line[BUFSIZ];
if ((fd = fopen(fname, "r")) != NULL) {
while (fgets(line, sizeof(line), fd) != NULL)
if ((p = strchr(line, '\n')) != NULL) {
*p = '\0';
if (line[0] == '#')
continue;
if (strcmp(line, name) == 0) {
found = 1;
break;
}
}
fclose(fd);
}
return (found);
}
/*
* Determine whether a user has access, based on information in
* _PATH_FTPUSERS. The users are listed one per line, with `allow'
* or `deny' after the username. If anything other than `allow', or
* just nothing, is given after the username, `deny' is assumed.
*
* If the user is not found in the file, but the pseudo-user `*' is,
* the permission is taken from that line.
*
* This preserves the old semantics where if a user was listed in the
* file he was denied, otherwise he was allowed.
*
* Return 1 if the user is denied, or 0 if he is allowed. */
static int
match(const char *pattern, const char *string)
{
#ifdef HAVE_FNMATCH
return fnmatch(pattern, string, FNM_NOESCAPE);
#else
return strcmp(pattern, "*") != 0 && strcmp(pattern, string) != 0;
#endif
}
static int
checkaccess(char *name)
{
#define ALLOWED 0
#define NOT_ALLOWED 1
FILE *fd;
int allowed = ALLOWED;
char *user, *perm, line[BUFSIZ];
char *foo;
fd = fopen(_PATH_FTPUSERS, "r");
if(fd == NULL)
return allowed;
while (fgets(line, sizeof(line), fd) != NULL) {
foo = NULL;
user = strtok_r(line, " \t\n", &foo);
if (user == NULL || user[0] == '#')
continue;
perm = strtok_r(NULL, " \t\n", &foo);
if (match(user, name) == 0){
if(perm && strcmp(perm, "allow") == 0)
allowed = ALLOWED;
else
allowed = NOT_ALLOWED;
break;
}
}
fclose(fd);
return allowed;
}
#undef ALLOWED
#undef NOT_ALLOWED
int do_login(int code, char *passwd)
{
FILE *fd;
login_attempts = 0; /* this time successful */
if (setegid((gid_t)pw->pw_gid) < 0) {
reply(550, "Can't set gid.");
return -1;
}
initgroups(pw->pw_name, pw->pw_gid);
/* open wtmp before chroot */
logwtmp(ttyline, pw->pw_name, remotehost);
logged_in = 1;
dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name);
if (guest) {
/*
* We MUST do a chdir() after the chroot. Otherwise
* the old current directory will be accessible as "."
* outside the new root!
*/
if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
reply(550, "Can't set guest privileges.");
return -1;
}
} else if (dochroot) {
if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
reply(550, "Can't change root.");
return -1;
}
} else 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);
return -1;
} else
lreply(code, "No directory! Logging in with home=/");
}
if (seteuid((uid_t)pw->pw_uid) < 0) {
reply(550, "Can't set uid.");
return -1;
}
/*
* Display a login message, if it exists.
* N.B. reply(code,) must follow the message.
*/
if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) {
char *cp, line[LINE_MAX];
while (fgets(line, sizeof(line), fd) != NULL) {
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
lreply(code, "%s", line);
}
}
if (guest) {
reply(code, "Guest login ok, access restrictions apply.");
#ifdef HAVE_SETPROCTITLE
snprintf (proctitle, sizeof(proctitle),
"%s: anonymous/%s",
remotehost,
passwd);
#endif /* HAVE_SETPROCTITLE */
if (logging)
syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s(%s), %s",
remotehost,
inet_ntoa(his_addr.sin_addr),
passwd);
} else {
reply(code, "User %s logged in.", pw->pw_name);
#ifdef HAVE_SETPROCTITLE
snprintf(proctitle, sizeof(proctitle), "%s: %s", remotehost, pw->pw_name);
setproctitle(proctitle);
#endif /* HAVE_SETPROCTITLE */
if (logging)
syslog(LOG_INFO, "FTP LOGIN FROM %s(%s) as %s",
remotehost,
inet_ntoa(his_addr.sin_addr),
pw->pw_name);
}
umask(defumask);
return 0;
}
/*
* 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, "", "");
pw = NULL;
logged_in = 0;
guest = 0;
dochroot = 0;
}
void
pass(char *passwd)
{
int rval;
/* some clients insists on sending a password */
if (logged_in && askpasswd == 0){
reply(230, "Dumpucko!");
return;
}
if (logged_in || askpasswd == 0) {
reply(503, "Login with USER first.");
return;
}
askpasswd = 0;
rval = 1;
if (!guest) { /* "ftp" is only account allowed no password */
if (pw == NULL)
rval = 1; /* failure below */
else if (otp_verify_user (&otp_ctx, passwd) == 0) {
rval = 0;
} else if((auth_level & AUTH_OTP) == 0) {
char realm[REALM_SZ];
if((rval = krb_get_lrealm(realm, 1)) == KSUCCESS)
rval = krb_verify_user(pw->pw_name, "", realm,
passwd, 1, NULL);
if (rval == KSUCCESS ){
if(k_hasafs())
k_afsklog(0, 0);
}else
rval = unix_verify_user(pw->pw_name, passwd);
} else {
char *s;
if (s = otp_error(&otp_ctx))
lreply(530, "OTP: %s", s);
}
memset (passwd, 0, strlen(passwd));
/*
* If rval == 1, the user failed the authentication
* check above. If rval == 0, either Kerberos or
* local authentication succeeded.
*/
if (rval) {
reply(530, "Login incorrect.");
if (logging)
syslog(LOG_NOTICE,
"FTP LOGIN FAILED FROM %s(%s), %s",
remotehost,
inet_ntoa(his_addr.sin_addr),
curname);
pw = NULL;
if (login_attempts++ >= 5) {
syslog(LOG_NOTICE,
"repeated login failures from %s(%s)",
remotehost,
inet_ntoa(his_addr.sin_addr));
exit(0);
}
return;
}
}
if(!do_login(230, passwd))
return;
/* Forget all about it... */
end_login();
}
void
retrieve(char *cmd, char *name)
{
FILE *fin = NULL, *dout;
struct stat st;
int (*closefunc) (FILE *);
char line[BUFSIZ];
if (cmd == 0) {
fin = fopen(name, "r");
closefunc = fclose;
st.st_size = 0;
if(fin == NULL){
struct cmds {
char *ext;
char *cmd;
} cmds[] = {
{".tar", "/bin/gtar cPf - %s"},
{".tar.gz", "/bin/gtar zcPf - %s"},
{".tar.Z", "/bin/gtar ZcPf - %s"},
{".gz", "/bin/gzip -c %s"},
{".Z", "/bin/compress -c %s"},
{NULL, NULL}
};
struct cmds *p;
for(p = cmds; p->ext; p++){
char *tail = name + strlen(name) - strlen(p->ext);
char c = *tail;
if(strcmp(tail, p->ext) == 0 &&
(*tail = 0) == 0 &&
access(name, R_OK) == 0){
snprintf (line, sizeof(line), p->cmd, name);
*tail = c;
break;
}
*tail = c;
}
if(p->ext){
fin = ftpd_popen(line, "r", 0, 0);
closefunc = ftpd_pclose;
st.st_size = -1;
cmd = line;
}
}
} else {
snprintf(line, sizeof(line), cmd, name);
name = line;
fin = ftpd_popen(line, "r", 1, 0);
closefunc = ftpd_pclose;
st.st_size = -1;
}
if (fin == NULL) {
if (errno != 0) {
perror_reply(550, name);
if (cmd == 0) {
LOGCMD("get", name);
}
}
return;
}
byte_count = -1;
if (cmd == 0){
if(fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
reply(550, "%s: not a plain file.", name);
goto done;
}
}
if (restart_point) {
if (type == TYPE_A) {
off_t i, n;
int c;
n = restart_point;
i = 0;
while (i++ < n) {
if ((c=getc(fin)) == EOF) {
perror_reply(550, name);
goto done;
}
if (c == '\n')
i++;
}
} else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
perror_reply(550, name);
goto done;
}
}
dout = dataconn(name, st.st_size, "w");
if (dout == NULL)
goto done;
set_buffer_size(fileno(dout), 0);
send_data(fin, dout);
fclose(dout);
data = -1;
pdata = -1;
done:
if (cmd == 0)
LOGBYTES("get", name, byte_count);
(*closefunc)(fin);
}
/* filename sanity check */
int
filename_check(char *filename)
{
static const char good_chars[] = "+-=_,.";
char *p;
p = strrchr(filename, '/');
if(p)
filename = p + 1;
p = filename;
if(isalnum(*p)){
p++;
while(*p && (isalnum(*p) || strchr(good_chars, *p)))
p++;
if(*p == '\0')
return 0;
}
lreply(553, "\"%s\" is an illegal filename.", filename);
lreply(553, "The filename must start with an alphanumeric "
"character and must only");
reply(553, "consist of alphanumeric characters or any of the following: %s",
good_chars);
return 1;
}
void
do_store(char *name, char *mode, int unique)
{
FILE *fout, *din;
struct stat st;
int (*closefunc) (FILE *);
if(guest && filename_check(name))
return;
if (unique && stat(name, &st) == 0 &&
(name = gunique(name)) == NULL) {
LOGCMD(*mode == 'w' ? "put" : "append", name);
return;
}
if (restart_point)
mode = "r+";
fout = fopen(name, mode);
closefunc = fclose;
if (fout == NULL) {
perror_reply(553, name);
LOGCMD(*mode == 'w' ? "put" : "append", name);
return;
}
byte_count = -1;
if (restart_point) {
if (type == TYPE_A) {
off_t i, n;
int c;
n = restart_point;
i = 0;
while (i++ < n) {
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;
set_buffer_size(fileno(din), 1);
if (receive_data(din, fout) == 0) {
if (unique)
reply(226, "Transfer complete (unique file name:%s).",
name);
else
reply(226, "Transfer complete.");
}
fclose(din);
data = -1;
pdata = -1;
done:
LOGBYTES(*mode == 'w' ? "put" : "append", name, byte_count);
(*closefunc)(fout);
}
static FILE *
getdatasock(char *mode)
{
int on = 1, s, t, tries;
if (data >= 0)
return (fdopen(data, mode));
seteuid((uid_t)0);
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0)
goto bad;
#if defined(SO_REUSEADDR) && defined(HAVE_SETSOCKOPT)
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
(void *) &on, sizeof(on)) < 0)
goto bad;
#endif
/* anchor socket to avoid multi-homing problems */
data_source.sin_family = AF_INET;
data_source.sin_addr = ctrl_addr.sin_addr;
for (tries = 1; ; tries++) {
if (bind(s, (struct sockaddr *)&data_source,
sizeof(data_source)) >= 0)
break;
if (errno != EADDRINUSE || tries > 10)
goto bad;
sleep(tries);
}
seteuid((uid_t)pw->pw_uid);
#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
on = IPTOS_THROUGHPUT;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (void *)&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;
seteuid((uid_t)pw->pw_uid);
close(s);
errno = t;
return (NULL);
}
static FILE *
dataconn(char *name, off_t size, char *mode)
{
char sizebuf[32];
FILE *file;
int retry = 0, tos;
file_size = size;
byte_count = 0;
if (size != (off_t) -1)
snprintf(sizebuf, sizeof(sizebuf), " (%ld bytes)", size);
else
strcpy(sizebuf, "");
if (pdata >= 0) {
struct sockaddr_in from;
int s, fromlen = sizeof(from);
s = accept(pdata, (struct sockaddr *)&from, &fromlen);
if (s < 0) {
reply(425, "Can't open data connection.");
close(pdata);
pdata = -1;
return (NULL);
}
close(pdata);
pdata = s;
#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
tos = IPTOS_THROUGHPUT;
setsockopt(s, IPPROTO_IP, IP_TOS, (void *)&tos,
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) {
reply(425, "Can't create data socket (%s,%d): %s.",
inet_ntoa(data_source.sin_addr),
ntohs(data_source.sin_port), strerror(errno));
return (NULL);
}
data = fileno(file);
while (connect(data, (struct sockaddr *)&data_dest,
sizeof(data_dest)) < 0) {
if (errno == EADDRINUSE && retry < swaitmax) {
sleep((unsigned) swaitint);
retry += swaitint;
continue;
}
perror_reply(425, "Can't build data connection");
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 void
send_data(FILE *instr, FILE *outstr)
{
int c, cnt, filefd, netfd;
static char *buf;
static size_t bufsize;
int i = 0;
char s[1024];
transflag++;
if (setjmp(urgcatch)) {
transflag = 0;
return;
}
switch (type) {
case TYPE_A:
while ((c = getc(instr)) != EOF) {
byte_count++;
if(i > 1022){
auth_write(fileno(outstr), s, i);
i = 0;
}
if(c == '\n')
s[i++] = '\r';
s[i++] = c;
}
if(i)
auth_write(fileno(outstr), s, i);
auth_write(fileno(outstr), s, 0);
fflush(outstr);
transflag = 0;
if (ferror(instr))
goto file_err;
if (ferror(outstr))
goto data_err;
reply(226, "Transfer complete.");
return;
case TYPE_I:
case TYPE_L:
#ifdef HAVE_MMAP
#ifndef MAP_FAILED
#define MAP_FAILED (-1)
#endif
{
struct stat st;
char *chunk;
int in = fileno(instr);
if(fstat(in, &st) == 0 && S_ISREG(st.st_mode)) {
chunk = mmap(0, st.st_size, PROT_READ, MAP_SHARED, in, 0);
if(chunk != (void *)MAP_FAILED) {
cnt = st.st_size - restart_point;
auth_write(fileno(outstr),
chunk + restart_point,
cnt);
munmap(chunk, st.st_size);
auth_write(fileno(outstr), NULL, 0);
byte_count = cnt;
transflag = 0;
}
}
}
#endif
if(transflag){
struct stat st;
netfd = fileno(outstr);
filefd = fileno(instr);
buf = alloc_buffer (buf, &bufsize,
fstat(filefd, &st) >= 0 ? &st : NULL);
if (buf == NULL) {
transflag = 0;
perror_reply(451, "Local resource failure: malloc");
return;
}
while ((cnt = read(filefd, buf, bufsize)) > 0 &&
auth_write(netfd, buf, cnt) == cnt)
byte_count += cnt;
auth_write(netfd, buf, 0); /* to end an encrypted stream */
transflag = 0;
if (cnt != 0) {
if (cnt < 0)
goto file_err;
goto data_err;
}
}
reply(226, "Transfer complete.");
return;
default:
transflag = 0;
reply(550, "Unimplemented TYPE %d in send_data", type);
return;
}
data_err:
transflag = 0;
perror_reply(426, "Data connection");
return;
file_err:
transflag = 0;
perror_reply(551, "Error on input file");
}
/*
* 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(FILE *instr, FILE *outstr)
{
int cnt, bare_lfs = 0;
static char *buf;
static size_t bufsize;
struct stat st;
transflag++;
if (setjmp(urgcatch)) {
transflag = 0;
return (-1);
}
buf = alloc_buffer (buf, &bufsize,
fstat(fileno(outstr), &st) >= 0 ? &st : NULL);
if (buf == NULL) {
transflag = 0;
perror_reply(451, "Local resource failure: malloc");
return -1;
}
switch (type) {
case TYPE_I:
case TYPE_L:
while ((cnt = auth_read(fileno(instr), buf, bufsize)) > 0) {
if (write(fileno(outstr), buf, cnt) != cnt)
goto file_err;
byte_count += cnt;
}
if (cnt < 0)
goto data_err;
transflag = 0;
return (0);
case TYPE_E:
reply(553, "TYPE E not implemented.");
transflag = 0;
return (-1);
case TYPE_A:
{
char *p, *q;
int cr_flag = 0;
while ((cnt = auth_read(fileno(instr),
buf + cr_flag,
bufsize - cr_flag)) > 0){
byte_count += cnt;
cnt += cr_flag;
cr_flag = 0;
for(p = buf, q = buf; p < buf + cnt;) {
if(*p == '\n')
bare_lfs++;
if(*p == '\r')
if(p == buf + cnt - 1){
cr_flag = 1;
p++;
continue;
}else if(p[1] == '\n'){
*q++ = '\n';
p += 2;
continue;
}
*q++ = *p++;
}
fwrite(buf, q - buf, 1, outstr);
if(cr_flag)
buf[0] = '\r';
}
if(cr_flag)
putc('\r', outstr);
fflush(outstr);
if (ferror(instr))
goto data_err;
if (ferror(outstr))
goto file_err;
transflag = 0;
if (bare_lfs) {
lreply(226, "WARNING! %d bare linefeeds received in ASCII mode\r\n"
" File may not have transferred correctly.\r\n",
bare_lfs);
}
return (0);
}
default:
reply(550, "Unimplemented TYPE %d in receive_data", type);
transflag = 0;
return (-1);
}
data_err:
transflag = 0;
perror_reply(426, "Data Connection");
return (-1);
file_err:
transflag = 0;
perror_reply(452, "Error writing file");
return (-1);
}
void
statfilecmd(char *filename)
{
FILE *fin;
int c;
char line[LINE_MAX];
snprintf(line, sizeof(line), "/bin/ls -la %s", filename);
fin = ftpd_popen(line, "r", 1, 0);
lreply(211, "status of %s:", filename);
while ((c = getc(fin)) != EOF) {
if (c == '\n') {
if (ferror(stdout)){
perror_reply(421, "control connection");
ftpd_pclose(fin);
dologout(1);
/* NOTREACHED */
}
if (ferror(fin)) {
perror_reply(551, filename);
ftpd_pclose(fin);
return;
}
putc('\r', stdout);
}
putc(c, stdout);
}
ftpd_pclose(fin);
reply(211, "End of Status");
}
void
statcmd(void)
{
#if 0
struct sockaddr_in *sin;
u_char *a, *p;
lreply(211, "%s FTP server status:", hostname, version);
printf(" %s\r\n", version);
printf(" Connected to %s", remotehost);
if (!isdigit(remotehost[0]))
printf(" (%s)", inet_ntoa(his_addr.sin_addr));
printf("\r\n");
if (logged_in) {
if (guest)
printf(" Logged in anonymously\r\n");
else
printf(" Logged in as %s\r\n", pw->pw_name);
} else if (askpasswd)
printf(" Waiting for password\r\n");
else
printf(" Waiting for user name\r\n");
printf(" TYPE: %s", typenames[type]);
if (type == TYPE_A || type == TYPE_E)
printf(", FORM: %s", formnames[form]);
if (type == TYPE_L)
#if NBBY == 8
printf(" %d", NBBY);
#else
printf(" %d", bytesize); /* need definition! */
#endif
printf("; STRUcture: %s; transfer MODE: %s\r\n",
strunames[stru], modenames[mode]);
if (data != -1)
printf(" Data connection open\r\n");
else if (pdata != -1) {
printf(" in Passive mode");
sin = &pasv_addr;
goto printaddr;
} else if (usedefault == 0) {
printf(" PORT");
sin = &data_dest;
printaddr:
a = (u_char *) &sin->sin_addr;
p = (u_char *) &sin->sin_port;
#define UC(b) (((int) b) & 0xff)
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]));
#undef UC
} else
printf(" No data connection\r\n");
#endif
reply(211, "End of status");
}
void
fatal(char *s)
{
reply(451, "Error in server: %s\n", s);
reply(221, "Closing connection due to server error.");
dologout(0);
/* NOTREACHED */
}
static void
int_reply(int, char *, const char *, va_list)
#ifdef __GNUC__
__attribute__ ((format (printf, 3, 0)))
#endif
;
static void
int_reply(int n, char *c, const char *fmt, va_list ap)
{
char buf[10240];
char *p;
p=buf;
if(n){
snprintf(p, sizeof(buf), "%d%s", n, c);
p+=strlen(p);
}
vsnprintf(p, sizeof(buf) - strlen(p), fmt, ap);
p+=strlen(p);
snprintf(p, sizeof(buf) - strlen(p), "\r\n");
p+=strlen(p);
auth_printf("%s", buf);
fflush(stdout);
if (debug)
syslog(LOG_DEBUG, "<--- %s- ", buf);
}
void
reply(int n, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int_reply(n, " ", fmt, ap);
delete_ftp_command();
va_end(ap);
}
void
lreply(int n, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int_reply(n, "-", fmt, ap);
va_end(ap);
}
void
nreply(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int_reply(0, NULL, fmt, ap);
va_end(ap);
}
static void
ack(char *s)
{
reply(250, "%s command successful.", s);
}
void
nack(char *s)
{
reply(502, "%s command not implemented.", s);
}
/* ARGSUSED */
void
yyerror(char *s)
{
char *cp;
if ((cp = strchr(cbuf,'\n')))
*cp = '\0';
reply(500, "'%s': command not understood.", cbuf);
}
void
do_delete(char *name)
{
struct stat st;
LOGCMD("delete", name);
if (stat(name, &st) < 0) {
perror_reply(550, name);
return;
}
if ((st.st_mode&S_IFMT) == S_IFDIR) {
if (rmdir(name) < 0) {
perror_reply(550, name);
return;
}
goto done;
}
if (unlink(name) < 0) {
perror_reply(550, name);
return;
}
done:
ack("DELE");
}
void
cwd(char *path)
{
if (chdir(path) < 0)
perror_reply(550, path);
else
ack("CWD");
}
void
makedir(char *name)
{
LOGCMD("mkdir", name);
if(guest && filename_check(name))
return;
if (mkdir(name, 0777) < 0)
perror_reply(550, name);
else{
if(guest)
chmod(name, 0700); /* guest has umask 777 */
reply(257, "MKD command successful.");
}
}
void
removedir(char *name)
{
LOGCMD("rmdir", name);
if (rmdir(name) < 0)
perror_reply(550, name);
else
ack("RMD");
}
void
pwd(void)
{
char path[MaxPathLen + 1];
char *ret;
/* SunOS has a broken getcwd that does popen(pwd) (!!!), this
* failes miserably when running chroot
*/
ret = getcwd(path, sizeof(path));
if (ret == NULL)
reply(550, "%s.", strerror(errno));
else
reply(257, "\"%s\" is current directory.", path);
}
char *
renamefrom(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 (name);
}
void
renamecmd(char *from, char *to)
{
LOGCMD2("rename", from, to);
if(guest && filename_check(to))
return;
if (rename(from, to) < 0)
perror_reply(550, "rename");
else
ack("RNTO");
}
static void
dolog(struct sockaddr_in *sin)
{
inaddr2str (sin->sin_addr, remotehost, sizeof(remotehost));
#ifdef HAVE_SETPROCTITLE
snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
setproctitle(proctitle);
#endif /* HAVE_SETPROCTITLE */
if (logging)
syslog(LOG_INFO, "connection from %s(%s)",
remotehost,
inet_ntoa(his_addr.sin_addr));
}
/*
* Record logout in wtmp file
* and exit with supplied status.
*/
void
dologout(int status)
{
transflag = 0;
if (logged_in) {
seteuid((uid_t)0);
logwtmp(ttyline, "", "");
dest_tkt();
if(k_hasafs())
k_unlog();
}
/* beware of flushing buffers after a SIGPIPE */
#ifdef XXX
exit(status);
#else
_exit(status);
#endif
}
void abor(void)
{
}
static void
myoob(int signo)
{
#if 0
char *cp;
#endif
/* only process if transfer occurring */
if (!transflag)
return;
/* This is all XXX */
oobflag = 1;
/* if the command resulted in a new command,
parse that as well */
do{
yyparse();
} while(ftp_command);
oobflag = 0;
#if 0
cp = tmpline;
if (getline(cp, 7) == NULL) {
reply(221, "You could at least say goodbye.");
dologout(0);
}
upper(cp);
if (strcmp(cp, "ABOR\r\n") == 0) {
tmpline[0] = '\0';
reply(426, "Transfer aborted. Data connection closed.");
reply(226, "Abort successful");
longjmp(urgcatch, 1);
}
if (strcmp(cp, "STAT\r\n") == 0) {
if (file_size != (off_t) -1)
reply(213, "Status: %ld of %ld bytes transferred",
(long)byte_count,
(long)file_size);
else
reply(213, "Status: %ld bytes transferred"
(long)byte_count);
}
#endif
}
/*
* 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(void)
{
int len;
char *p, *a;
pdata = socket(AF_INET, SOCK_STREAM, 0);
if (pdata < 0) {
perror_reply(425, "Can't open passive connection");
return;
}
pasv_addr = ctrl_addr;
pasv_addr.sin_port = 0;
seteuid((uid_t)0);
if (bind(pdata, (struct sockaddr *)&pasv_addr, sizeof(pasv_addr)) < 0) {
seteuid((uid_t)pw->pw_uid);
goto pasv_error;
}
seteuid((uid_t)pw->pw_uid);
len = sizeof(pasv_addr);
if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
goto pasv_error;
if (listen(pdata, 1) < 0)
goto pasv_error;
a = (char *) &pasv_addr.sin_addr;
p = (char *) &pasv_addr.sin_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:
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.
*/
static char *
gunique(char *local)
{
static char new[MaxPathLen];
struct stat st;
int count;
char *cp;
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++) {
snprintf (new, sizeof(new), "%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(int code, char *string)
{
reply(code, "%s: %s.", string, strerror(errno));
}
static char *onefile[] = {
"",
0
};
void
send_file_list(char *whichf)
{
struct stat st;
DIR *dirp = NULL;
struct dirent *dir;
FILE *dout = NULL;
char **dirlist, *dirname;
int simple = 0;
int freeglob = 0;
glob_t gl;
char buf[MaxPathLen];
if (strpbrk(whichf, "~{[*?") != NULL) {
int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|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 {
onefile[0] = whichf;
dirlist = onefile;
simple = 1;
}
if (setjmp(urgcatch)) {
transflag = 0;
goto out;
}
while ((dirname = *dirlist++)) {
if (stat(dirname, &st) < 0) {
/*
* If user typed "ls -l", etc, and the client
* used NLST, do what the user meant.
*/
if (dirname[0] == '-' && *dirlist == NULL &&
transflag == 0) {
retrieve("/bin/ls %s", dirname);
goto out;
}
perror_reply(550, whichf);
if (dout != NULL) {
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++;
}
snprintf(buf, sizeof(buf), "%s%s\n", dirname,
type == TYPE_A ? "\r" : "");
auth_write(fileno(dout), buf, strlen(buf));
byte_count += strlen(dirname) + 1;
continue;
} else if (!S_ISDIR(st.st_mode))
continue;
if ((dirp = opendir(dirname)) == NULL)
continue;
while ((dir = readdir(dirp)) != NULL) {
char nbuf[MaxPathLen];
if (!strcmp(dir->d_name, "."))
continue;
if (!strcmp(dir->d_name, ".."))
continue;
snprintf(nbuf, sizeof(nbuf), "%s/%s", dirname, dir->d_name);
/*
* We have to do a stat to insure it's
* not a directory or special file.
*/
if (simple || (stat(nbuf, &st) == 0 &&
S_ISREG(st.st_mode))) {
if (dout == NULL) {
dout = dataconn("file list", (off_t)-1, "w");
if (dout == NULL)
goto out;
transflag++;
}
if(strncmp(nbuf, "./", 2) == 0)
snprintf(buf, sizeof(buf), "%s%s\n", nbuf +2,
type == TYPE_A ? "\r" : "");
else
snprintf(buf, sizeof(buf), "%s%s\n", nbuf,
type == TYPE_A ? "\r" : "");
auth_write(fileno(dout), buf, strlen(buf));
byte_count += strlen(nbuf) + 1;
}
}
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){
auth_write(fileno(dout), buf, 0); /* XXX flush */
fclose(dout);
}
data = -1;
pdata = -1;
out:
if (freeglob) {
freeglob = 0;
globfree(&gl);
}
}
int
find(char *pattern)
{
char line[1024];
FILE *f;
snprintf(line, sizeof(line),
"/bin/locate -d %s %s",
ftp_rooted("/etc/locatedb"),
pattern);
f = ftpd_popen(line, "r", 1, 1);
if(f == NULL){
perror_reply(550, "/bin/locate");
return 1;
}
lreply(200, "Output from find.");
while(fgets(line, sizeof(line), f)){
if(line[strlen(line)-1] == '\n')
line[strlen(line)-1] = 0;
nreply("%s", line);
}
reply(200, "Done");
ftpd_pclose(f);
return 0;
}
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