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07da07565e
freebsd-skq/usr.bin/ftp/ftp.c
Yoshinobu Inoue 3fdf7be445 Previous fix was incomplete and has problem in reverse lookup failed dest, 
so fix it.

Approved by: jkh

Submitted by: Ian West <ian@niw.com.au>
2000-02-28 18:37:07 +00:00

1931 lines
41 KiB
C
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/* $FreeBSD$ */
/* $NetBSD: ftp.c,v 1.29.2.1 1997/11/18 01:01:04 mellon Exp $ */
/*
* Copyright (c) 1985, 1989, 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94";
#else
__RCSID("$FreeBSD$");
__RCSID_SOURCE("$NetBSD: ftp.c,v 1.29.2.1 1997/11/18 01:01:04 mellon Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <arpa/ftp.h>
#include <arpa/telnet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "ftp_var.h"
/* wrapper for KAME-special getnameinfo() */
#ifndef NI_WITHSCOPEID
#define NI_WITHSCOPEID 0
#endif
extern int h_errno;
int data = -1;
int abrtflag = 0;
jmp_buf ptabort;
int ptabflg;
int ptflag = 0;
FILE *cin, *cout;
union sockunion {
struct sockinet {
u_char si_len;
u_char si_family;
u_short si_port;
} su_si;
struct sockaddr_in su_sin;
struct sockaddr_in6 su_sin6;
};
#define su_len su_si.si_len
#define su_family su_si.si_family
#define su_port su_si.si_port
union sockunion myctladdr, hisctladdr, data_addr;
char *
hookup(host0, port)
const char *host0;
char *port;
{
int s, len, tos, error;
struct addrinfo hints, *res, *res0;
static char hostnamebuf[MAXHOSTNAMELEN];
char *host;
if (*host0 == '[' && strrchr(host0, ']') != NULL) { /*IPv6 addr in []*/
strncpy(hostnamebuf, host0 + 1, strlen(host0) - 2);
hostnamebuf[strlen(host0) - 2] = '\0';
} else {
strncpy(hostnamebuf, host0, strlen(host0));
hostnamebuf[strlen(host0)] = '\0';
}
host = hostnamebuf;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
error = getaddrinfo(host, port, &hints, &res0);
if (error) {
warnx("%s: %s", host, gai_strerror(error));
if (error == EAI_SYSTEM)
warnx("%s: %s", host, strerror(errno));
code = -1;
return (0);
}
res = res0;
if (res->ai_canonname)
(void) strncpy(hostnamebuf, res->ai_canonname,
sizeof(hostnamebuf));
hostname = hostnamebuf;
while (1) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
res = res->ai_next;
if (res)
continue;
warn("socket");
code = -1;
return (0);
}
if (dobind) {
struct addrinfo *bindres;
int binderr = -1;
for (bindres = bindres0;
bindres != NULL;
bindres = bindres->ai_next)
if (bindres->ai_family == res->ai_family)
break;
if (bindres == NULL)
bindres = bindres0;
binderr = bind(s, bindres->ai_addr,
bindres->ai_addrlen);
if (binderr == -1)
{
res = res->ai_next;
if (res) {
(void)close(s);
continue;
}
warn("bind");
code = -1;
goto bad;
}
}
if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
break;
if (res->ai_next) {
char hname[INET6_ADDRSTRLEN];
getnameinfo(res->ai_addr, res->ai_addrlen,
hname, sizeof(hname) - 1, NULL, 0,
NI_NUMERICHOST|NI_WITHSCOPEID);
warn("connect to address %s", hname);
res = res->ai_next;
getnameinfo(res->ai_addr, res->ai_addrlen,
hname, sizeof(hname) - 1, NULL, 0,
NI_NUMERICHOST|NI_WITHSCOPEID);
printf("Trying %s...\n", hname);
(void)close(s);
continue;
}
warn("connect");
code = -1;
goto bad;
}
memcpy(&hisctladdr, res->ai_addr, res->ai_addrlen);
freeaddrinfo(res0);
len = sizeof(myctladdr);
if (getsockname(s, (struct sockaddr *)&myctladdr, &len) < 0) {
warn("getsockname");
code = -1;
goto bad;
}
#ifdef IP_TOS
if (myctladdr.su_family == AF_INET)
{
tos = IPTOS_LOWDELAY;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0)
warn("setsockopt TOS (ignored)");
}
#endif
cin = fdopen(s, "r");
cout = fdopen(s, "w");
if (cin == NULL || cout == NULL) {
warnx("fdopen failed.");
if (cin)
(void)fclose(cin);
if (cout)
(void)fclose(cout);
code = -1;
goto bad;
}
if (verbose)
printf("Connected to %s.\n", hostname);
if (getreply(0) > 2) { /* read startup message from server */
if (cin)
(void)fclose(cin);
if (cout)
(void)fclose(cout);
code = -1;
goto bad;
}
#ifdef SO_OOBINLINE
{
int on = 1;
if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on))
< 0 && debug) {
warn("setsockopt");
}
}
#endif /* SO_OOBINLINE */
return (hostname);
bad:
(void)close(s);
return ((char *)0);
}
void
cmdabort(notused)
int notused;
{
alarmtimer(0);
putchar('\n');
(void)fflush(stdout);
abrtflag++;
if (ptflag)
longjmp(ptabort, 1);
}
/*VARARGS*/
int
#ifdef __STDC__
command(const char *fmt, ...)
#else
command(va_alist)
va_dcl
#endif
{
va_list ap;
int r;
sig_t oldintr;
#ifndef __STDC__
const char *fmt;
#endif
abrtflag = 0;
if (debug) {
fputs("---> ", stdout);
#ifdef __STDC__
va_start(ap, fmt);
#else
va_start(ap);
fmt = va_arg(ap, const char *);
#endif
if (strncmp("PASS ", fmt, 5) == 0)
fputs("PASS XXXX", stdout);
else if (strncmp("ACCT ", fmt, 5) == 0)
fputs("ACCT XXXX", stdout);
else
vprintf(fmt, ap);
va_end(ap);
putchar('\n');
(void)fflush(stdout);
}
if (cout == NULL) {
warnx("No control connection for command.");
code = -1;
return (0);
}
oldintr = signal(SIGINT, cmdabort);
#ifdef __STDC__
va_start(ap, fmt);
#else
va_start(ap);
fmt = va_arg(ap, char *);
#endif
vfprintf(cout, fmt, ap);
va_end(ap);
fputs("\r\n", cout);
(void)fflush(cout);
cpend = 1;
r = getreply(!strcmp(fmt, "QUIT"));
if (abrtflag && oldintr != SIG_IGN)
(*oldintr)(SIGINT);
(void)signal(SIGINT, oldintr);
return (r);
}
char reply_string[BUFSIZ]; /* first line of previous reply */
int
getreply(expecteof)
int expecteof;
{
char current_line[BUFSIZ]; /* last line of previous reply */
int c, n, line;
int dig;
int originalcode = 0, continuation = 0;
sig_t oldintr;
int pflag = 0;
char *cp, *pt = pasv;
oldintr = signal(SIGINT, cmdabort);
for (line = 0 ;; line++) {
dig = n = code = 0;
cp = current_line;
while ((c = getc(cin)) != '\n') {
if (c == IAC) { /* handle telnet commands */
switch (c = getc(cin)) {
case WILL:
case WONT:
c = getc(cin);
fprintf(cout, "%c%c%c", IAC, DONT, c);
(void)fflush(cout);
break;
case DO:
case DONT:
c = getc(cin);
fprintf(cout, "%c%c%c", IAC, WONT, c);
(void)fflush(cout);
break;
default:
break;
}
continue;
}
dig++;
if (c == EOF) {
if (expecteof) {
(void)signal(SIGINT, oldintr);
code = 221;
return (0);
}
lostpeer();
if (verbose) {
puts(
"421 Service not available, remote server has closed connection.");
(void)fflush(stdout);
}
code = 421;
return (4);
}
if (c != '\r' && (verbose > 0 ||
(verbose > -1 && n == '5' && dig > 4))) {
if (proxflag &&
(dig == 1 || (dig == 5 && verbose == 0)))
printf("%s:", hostname);
(void)putchar(c);
}
if (dig < 4 && isdigit((unsigned char)c))
code = code * 10 + (c - '0');
switch (pflag) {
case 0:
if (code == 227 || code == 228) {
/* result for PASV/LPSV */
pflag = 1;
/* fall through */
} else if (code == 229) {
/* result for EPSV */
pflag = 100;
break;
} else
break;
case 1:
if (!(dig > 4 && isdigit((unsigned char)c)))
break;
pflag = 2;
/* fall through */
case 2:
if (c != '\r' && c != ')' &&
pt < &pasv[sizeof(pasv)-1])
*pt++ = c;
else {
*pt = '\0';
pflag = 3;
}
break;
case 100:
if (dig > 4 && c == '(')
pflag = 2;
break;
}
if (dig == 4 && c == '-') {
if (continuation)
code = 0;
continuation++;
}
if (n == 0)
n = c;
if (cp < &current_line[sizeof(current_line) - 1])
*cp++ = c;
}
if (verbose > 0 || (verbose > -1 && n == '5')) {
(void)putchar(c);
(void)fflush (stdout);
}
if (line == 0) {
size_t len = cp - current_line;
if (len > sizeof(reply_string))
len = sizeof(reply_string);
(void)strncpy(reply_string, current_line, len);
reply_string[len] = '\0';
}
if (continuation && code != originalcode) {
if (originalcode == 0)
originalcode = code;
continue;
}
*cp = '\0';
if (n != '1')
cpend = 0;
(void)signal(SIGINT, oldintr);
if (code == 421 || originalcode == 421)
lostpeer();
if (abrtflag && oldintr != cmdabort && oldintr != SIG_IGN)
(*oldintr)(SIGINT);
return (n - '0');
}
}
int
empty(mask, sec)
fd_set *mask;
int sec;
{
struct timeval t;
t.tv_sec = (long) sec;
t.tv_usec = 0;
return (select(32, mask, (fd_set *) 0, (fd_set *) 0, &t));
}
jmp_buf sendabort;
void
abortsend(notused)
int notused;
{
alarmtimer(0);
mflag = 0;
abrtflag = 0;
puts("\nsend aborted\nwaiting for remote to finish abort.");
(void)fflush(stdout);
longjmp(sendabort, 1);
}
void
sendrequest(cmd, local, remote, printnames)
const char *cmd, *local, *remote;
int printnames;
{
struct stat st;
int c, d;
FILE *fin, *dout;
int (*closefunc) __P((FILE *));
sig_t oldinti, oldintr, oldintp;
volatile off_t hashbytes;
char *lmode, buf[BUFSIZ], *bufp;
int oprogress;
#ifdef __GNUC__ /* XXX: to shut up gcc warnings */
(void)&fin;
(void)&dout;
(void)&closefunc;
(void)&oldinti;
(void)&oldintr;
(void)&oldintp;
(void)&lmode;
#endif
hashbytes = mark;
direction = "sent";
dout = NULL;
bytes = 0;
filesize = -1;
oprogress = progress;
if (verbose && printnames) {
if (local && *local != '-')
printf("local: %s ", local);
if (remote)
printf("remote: %s\n", remote);
}
if (proxy) {
proxtrans(cmd, local, remote);
return;
}
if (curtype != type)
changetype(type, 0);
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
oldinti = NULL;
lmode = "w";
if (setjmp(sendabort)) {
while (cpend) {
(void)getreply(0);
}
if (data >= 0) {
(void)close(data);
data = -1;
}
if (oldintr)
(void)signal(SIGINT, oldintr);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (oldinti)
(void)signal(SIGINFO, oldinti);
code = -1;
goto cleanupsend;
}
oldintr = signal(SIGINT, abortsend);
oldinti = signal(SIGINFO, psummary);
if (strcmp(local, "-") == 0) {
fin = stdin;
progress = 0;
} else if (*local == '|') {
oldintp = signal(SIGPIPE, SIG_IGN);
fin = popen(local + 1, "r");
if (fin == NULL) {
warn("%s", local + 1);
(void)signal(SIGINT, oldintr);
(void)signal(SIGPIPE, oldintp);
(void)signal(SIGINFO, oldinti);
code = -1;
goto cleanupsend;
}
progress = 0;
closefunc = pclose;
} else {
fin = fopen(local, "r");
if (fin == NULL) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
goto cleanupsend;
}
closefunc = fclose;
if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
printf("%s: not a plain file.\n", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
fclose(fin);
code = -1;
goto cleanupsend;
}
filesize = st.st_size;
}
if (initconn()) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
code = -1;
if (closefunc != NULL)
(*closefunc)(fin);
goto cleanupsend;
}
if (setjmp(sendabort))
goto abort;
if (restart_point &&
(strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
int rc;
rc = -1;
switch (curtype) {
case TYPE_A:
rc = fseek(fin, (long) restart_point, SEEK_SET);
break;
case TYPE_I:
case TYPE_L:
rc = lseek(fileno(fin), restart_point, SEEK_SET);
break;
}
if (rc < 0) {
warn("local: %s", local);
if (closefunc != NULL)
(*closefunc)(fin);
goto cleanupsend;
}
if (command("REST %qd", (long long) restart_point) !=
CONTINUE) {
if (closefunc != NULL)
(*closefunc)(fin);
goto cleanupsend;
}
lmode = "r+w";
}
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
goto cleanupsend;
}
} else
if (command("%s", cmd) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
goto cleanupsend;
}
dout = dataconn(lmode);
if (dout == NULL)
goto abort;
progressmeter(-1);
oldintp = signal(SIGPIPE, SIG_IGN);
switch (curtype) {
case TYPE_I:
case TYPE_L:
errno = d = 0;
while ((c = read(fileno(fin), buf, sizeof(buf))) > 0) {
bytes += c;
for (bufp = buf; c > 0; c -= d, bufp += d)
if ((d = write(fileno(dout), bufp, c)) <= 0)
break;
if (hash && (!progress || filesize < 0) ) {
while (bytes >= hashbytes) {
(void)putchar('#');
hashbytes += mark;
}
(void)fflush(stdout);
}
}
if (hash && (!progress || filesize < 0) && bytes > 0) {
if (bytes < mark)
(void)putchar('#');
(void)putchar('\n');
(void)fflush(stdout);
}
if (c < 0)
warn("local: %s", local);
if (d < 0) {
if (errno != EPIPE)
warn("netout");
bytes = -1;
}
break;
case TYPE_A:
while ((c = getc(fin)) != EOF) {
if (c == '\n') {
while (hash && (!progress || filesize < 0) &&
(bytes >= hashbytes)) {
(void)putchar('#');
(void)fflush(stdout);
hashbytes += mark;
}
if (ferror(dout))
break;
(void)putc('\r', dout);
bytes++;
}
(void)putc(c, dout);
bytes++;
#if 0 /* this violates RFC */
if (c == '\r') {
(void)putc('\0', dout);
bytes++;
}
#endif
}
if (hash && (!progress || filesize < 0)) {
if (bytes < hashbytes)
(void)putchar('#');
(void)putchar('\n');
(void)fflush(stdout);
}
if (ferror(fin))
warn("local: %s", local);
if (ferror(dout)) {
if (errno != EPIPE)
warn("netout");
bytes = -1;
}
break;
}
progressmeter(1);
if (closefunc != NULL)
(*closefunc)(fin);
(void)fclose(dout);
(void)getreply(0);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (bytes > 0)
ptransfer(0);
goto cleanupsend;
abort:
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (!cpend) {
code = -1;
return;
}
if (data >= 0) {
(void)close(data);
data = -1;
}
if (dout)
(void)fclose(dout);
(void)getreply(0);
code = -1;
if (closefunc != NULL && fin != NULL)
(*closefunc)(fin);
if (bytes > 0)
ptransfer(0);
cleanupsend:
progress = oprogress;
restart_point = 0;
}
jmp_buf recvabort;
void
abortrecv(notused)
int notused;
{
alarmtimer(0);
mflag = 0;
abrtflag = 0;
puts("\nreceive aborted\nwaiting for remote to finish abort.");
(void)fflush(stdout);
longjmp(recvabort, 1);
}
void
recvrequest(cmd, local, remote, lmode, printnames, ignorespecial)
const char *cmd, *local, *remote, *lmode;
int printnames, ignorespecial;
{
FILE *fout, *din;
int (*closefunc) __P((FILE *));
sig_t oldinti, oldintr, oldintp;
int c, d;
volatile int is_retr, tcrflag, bare_lfs;
static size_t bufsize;
static char *buf;
volatile off_t hashbytes;
struct stat st;
time_t mtime;
struct timeval tval[2];
int oprogress;
int opreserve;
#ifdef __GNUC__ /* XXX: to shut up gcc warnings */
(void)&local;
(void)&fout;
(void)&din;
(void)&closefunc;
(void)&oldinti;
(void)&oldintr;
(void)&oldintp;
#endif
fout = NULL;
din = NULL;
oldinti = NULL;
hashbytes = mark;
direction = "received";
bytes = 0;
bare_lfs = 0;
filesize = -1;
oprogress = progress;
opreserve = preserve;
is_retr = (strcmp(cmd, "RETR") == 0);
if (is_retr && verbose && printnames) {
if (local && (ignorespecial || *local != '-'))
printf("local: %s ", local);
if (remote)
printf("remote: %s\n", remote);
}
if (proxy && is_retr) {
proxtrans(cmd, local, remote);
return;
}
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
tcrflag = !crflag && is_retr;
if (setjmp(recvabort)) {
while (cpend) {
(void)getreply(0);
}
if (data >= 0) {
(void)close(data);
data = -1;
}
if (oldintr)
(void)signal(SIGINT, oldintr);
if (oldinti)
(void)signal(SIGINFO, oldinti);
progress = oprogress;
preserve = opreserve;
code = -1;
return;
}
oldintr = signal(SIGINT, abortrecv);
oldinti = signal(SIGINFO, psummary);
if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
if (access(local, W_OK) < 0) {
char *dir = strrchr(local, '/');
if (errno != ENOENT && errno != EACCES) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (dir != NULL)
*dir = 0;
d = access(dir == local ? "/" : dir ? local : ".", W_OK);
if (dir != NULL)
*dir = '/';
if (d < 0) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (!runique && errno == EACCES &&
chmod(local, 0600) < 0) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (runique && errno == EACCES &&
(local = gunique(local)) == NULL) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
}
else if (runique && (local = gunique(local)) == NULL) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
}
if (!is_retr) {
if (curtype != TYPE_A)
changetype(TYPE_A, 0);
} else {
if (curtype != type)
changetype(type, 0);
filesize = remotesize(remote, 0);
}
if (initconn()) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (setjmp(recvabort))
goto abort;
if (is_retr && restart_point &&
command("REST %qd", (long long) restart_point) != CONTINUE)
return;
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
return;
}
} else {
if (command("%s", cmd) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
return;
}
}
din = dataconn("r");
if (din == NULL)
goto abort;
if (!ignorespecial && strcmp(local, "-") == 0) {
fout = stdout;
progress = 0;
preserve = 0;
} else if (!ignorespecial && *local == '|') {
oldintp = signal(SIGPIPE, SIG_IGN);
fout = popen(local + 1, "w");
if (fout == NULL) {
warn("%s", local+1);
goto abort;
}
progress = 0;
preserve = 0;
closefunc = pclose;
} else {
fout = fopen(local, lmode);
if (fout == NULL) {
warn("local: %s", local);
goto abort;
}
closefunc = fclose;
}
if (fstat(fileno(fout), &st) < 0 || st.st_blksize == 0)
st.st_blksize = BUFSIZ;
if (st.st_blksize > bufsize) {
if (buf)
(void)free(buf);
buf = malloc((unsigned)st.st_blksize);
if (buf == NULL) {
warn("malloc");
bufsize = 0;
goto abort;
}
bufsize = st.st_blksize;
}
if (!S_ISREG(st.st_mode)) {
progress = 0;
preserve = 0;
}
progressmeter(-1);
switch (curtype) {
case TYPE_I:
case TYPE_L:
if (is_retr && restart_point &&
lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
warn("local: %s", local);
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL)
(*closefunc)(fout);
return;
}
errno = d = 0;
while ((c = read(fileno(din), buf, bufsize)) > 0) {
if ((d = write(fileno(fout), buf, c)) != c)
break;
bytes += c;
if (hash && (!progress || filesize < 0)) {
while (bytes >= hashbytes) {
(void)putchar('#');
hashbytes += mark;
}
(void)fflush(stdout);
}
}
if (hash && (!progress || filesize < 0) && bytes > 0) {
if (bytes < mark)
(void)putchar('#');
(void)putchar('\n');
(void)fflush(stdout);
}
if (c < 0) {
if (errno != EPIPE)
warn("netin");
bytes = -1;
}
if (d < c) {
if (d < 0)
warn("local: %s", local);
else
warnx("%s: short write", local);
}
break;
case TYPE_A:
if (is_retr && restart_point) {
int ch;
long i, n;
if (fseek(fout, 0L, SEEK_SET) < 0)
goto done;
n = (long)restart_point;
for (i = 0; i++ < n;) {
if ((ch = getc(fout)) == EOF)
goto done;
if (ch == '\n')
i++;
}
if (fseek(fout, 0L, SEEK_CUR) < 0) {
done:
warn("local: %s", local);
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL)
(*closefunc)(fout);
return;
}
}
while ((c = getc(din)) != EOF) {
if (c == '\n')
bare_lfs++;
while (c == '\r') {
while (hash && (!progress || filesize < 0) &&
(bytes >= hashbytes)) {
(void)putchar('#');
(void)fflush(stdout);
hashbytes += mark;
}
bytes++;
if ((c = getc(din)) != '\n' || tcrflag) {
if (ferror(fout))
goto break2;
(void)putc('\r', fout);
if (c == '\0') {
bytes++;
goto contin2;
}
if (c == EOF)
goto contin2;
}
}
(void)putc(c, fout);
bytes++;
contin2: ;
}
break2:
if (bare_lfs) {
printf(
"WARNING! %d bare linefeeds received in ASCII mode.\n", bare_lfs);
puts("File may not have transferred correctly.");
}
if (hash && (!progress || filesize < 0)) {
if (bytes < hashbytes)
(void)putchar('#');
(void)putchar('\n');
(void)fflush(stdout);
}
if (ferror(din)) {
if (errno != EPIPE)
warn("netin");
bytes = -1;
}
if (ferror(fout))
warn("local: %s", local);
break;
}
progressmeter(1);
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL)
(*closefunc)(fout);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
(void)fclose(din);
(void)getreply(0);
if (bytes >= 0 && is_retr) {
if (bytes > 0)
ptransfer(0);
if (preserve && (closefunc == fclose)) {
mtime = remotemodtime(remote, 0);
if (mtime != -1) {
(void)gettimeofday(&tval[0],
(struct timezone *)0);
tval[1].tv_sec = mtime;
tval[1].tv_usec = 0;
if (utimes(local, tval) == -1) {
printf(
"Can't change modification time on %s to %s",
local, asctime(localtime(&mtime)));
}
}
}
}
return;
abort:
/* abort using RFC959 recommended IP,SYNC sequence */
progress = oprogress;
preserve = opreserve;
if (oldintp)
(void)signal(SIGPIPE, oldintp);
(void)signal(SIGINT, SIG_IGN);
if (!cpend) {
code = -1;
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
return;
}
abort_remote(din);
code = -1;
if (data >= 0) {
(void)close(data);
data = -1;
}
if (closefunc != NULL && fout != NULL)
(*closefunc)(fout);
if (din)
(void)fclose(din);
if (bytes > 0)
ptransfer(0);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
}
/*
* Need to start a listen on the data channel before we send the command,
* otherwise the server's connect may fail.
*/
int
initconn()
{
char *p, *a;
int result, len, tmpno = 0;
int on = 1;
int error, ports;
u_int af;
u_int hal, h[16];
u_int pal, prt[2];
char *pasvcmd;
#ifdef INET6
if (myctladdr.su_family == AF_INET6
&& (IN6_IS_ADDR_LINKLOCAL(&myctladdr.su_sin6.sin6_addr)
|| IN6_IS_ADDR_SITELOCAL(&myctladdr.su_sin6.sin6_addr))) {
warnx("use of scoped address can be troublesome");
}
#endif
if (passivemode) {
data_addr = myctladdr;
data = socket(data_addr.su_family, SOCK_STREAM, 0);
if (data < 0) {
warn("socket");
return (1);
}
if (dobind) {
struct addrinfo *bindres;
int binderr = -1;
for (bindres = bindres0;
bindres != NULL;
bindres = bindres->ai_next)
if (bindres->ai_family == data_addr.su_family)
break;
if (bindres == NULL)
bindres = bindres0;
binderr = bind(data, bindres->ai_addr,
bindres->ai_addrlen);
if (binderr == -1)
{
warn("bind");
goto bad;
}
}
if ((options & SO_DEBUG) &&
setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on,
sizeof(on)) < 0)
warn("setsockopt (ignored)");
switch (data_addr.su_family) {
case AF_INET:
if (try_epsv) {
int overbose;
overbose = verbose;
if (debug == 0)
verbose = -1;
result = command(pasvcmd = "EPSV");
verbose = overbose;
if (code / 10 == 22 && code != 229) {
puts("wrong server: EPSV return code must be 229");
result = COMPLETE + 1;
}
} else
result = COMPLETE + 1;
if (result != COMPLETE) {
try_epsv = 0;
result = command(pasvcmd = "PASV");
}
break;
#ifdef INET6
case AF_INET6:
result = command(pasvcmd = "EPSV");
if (code / 10 == 22 && code != 229) {
puts("wrong server: EPSV return code must be 229");
result = COMPLETE + 1;
}
if (result != COMPLETE)
result = command(pasvcmd = "LPSV");
break;
#endif
default:
result = COMPLETE + 1;
}
if (result != COMPLETE) {
puts("Passive mode refused.");
goto bad;
}
#define pack2(var, offset) \
(((var[(offset) + 0] & 0xff) << 8) | ((var[(offset) + 1] & 0xff) << 0))
#define pack4(var, offset) \
(((var[(offset) + 0] & 0xff) << 24) | ((var[(offset) + 1] & 0xff) << 16) \
| ((var[(offset) + 2] & 0xff) << 8) | ((var[(offset) + 3] & 0xff) << 0))
/*
* What we've got at this point is a string of comma
* separated one-byte unsigned integer values.
* In PASV case,
* The first four are the an IP address. The fifth is
* the MSB of the port number, the sixth is the LSB.
* From that we'll prepare a sockaddr_in.
* In other case, the format is more complicated.
*/
if (strcmp(pasvcmd, "PASV") == 0) {
if (code / 10 == 22 && code != 227) {
puts("wrong server: return code must be 227");
error = 1;
goto bad;
}
error = sscanf(pasv, "%d,%d,%d,%d,%d,%d",
&h[0], &h[1], &h[2], &h[3],
&prt[0], &prt[1]);
if (error == 6) {
error = 0;
data_addr.su_sin.sin_addr.s_addr =
htonl(pack4(h, 0));
} else
error = 1;
} else if (strcmp(pasvcmd, "LPSV") == 0) {
if (code / 10 == 22 && code != 228) {
puts("wrong server: return code must be 228");
error = 1;
goto bad;
}
switch (data_addr.su_family) {
case AF_INET:
error = sscanf(pasv,
"%d,%d,%d,%d,%d,%d,%d,%d,%d",
&af, &hal,
&h[0], &h[1], &h[2], &h[3],
&pal, &prt[0], &prt[1]);
if (error == 9 && af == 4 && hal == 4 && pal == 2) {
error = 0;
data_addr.su_sin.sin_addr.s_addr =
htonl(pack4(h, 0));
} else
error = 1;
break;
#ifdef INET6
case AF_INET6:
error = sscanf(pasv,
"%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
&af, &hal,
&h[0], &h[1], &h[2], &h[3],
&h[4], &h[5], &h[6], &h[7],
&h[8], &h[9], &h[10], &h[11],
&h[12], &h[13], &h[14], &h[15],
&pal, &prt[0], &prt[1]);
if (error != 21 || af != 6 || hal != 16 || pal != 2) {
error = 1;
break;
}
error = 0;
{
u_int32_t *p32;
p32 = (u_int32_t *)&data_addr.su_sin6.sin6_addr;
p32[0] = htonl(pack4(h, 0));
p32[1] = htonl(pack4(h, 4));
p32[2] = htonl(pack4(h, 8));
p32[3] = htonl(pack4(h, 12));
}
break;
#endif
default:
error = 1;
}
} else if (strcmp(pasvcmd, "EPSV") == 0) {
char delim[4];
char *tcpport;
prt[0] = 0;
if (code / 10 == 22 && code != 229) {
puts("wrong server: return code must be 229");
error = 1;
goto bad;
}
error = sscanf(pasv, "%c%c%c%d%c",
&delim[0], &delim[1], &delim[2],
&prt[1], &delim[3]);
if (error != 5) {
error = 1;
goto epsv_done;
}
if (delim[0] != delim[1] || delim[0] != delim[2]
|| delim[0] != delim[3]) {
error = 1;
goto epsv_done;
}
data_addr = hisctladdr;
/* quickhack */
prt[0] = (prt[1] & 0xff00) >> 8;
prt[1] &= 0xff;
error = 0;
epsv_done:
} else
error = 1;
if (error) {
puts(
"Passive mode address scan failure. Shouldn't happen!");
goto bad;
};
data_addr.su_port = htons(pack2(prt, 0));
if (connect(data, (struct sockaddr *)&data_addr,
data_addr.su_len) < 0) {
warn("connect");
goto bad;
}
#ifdef IP_TOS
if (data_addr.su_family == AF_INET)
{
on = IPTOS_THROUGHPUT;
if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on,
sizeof(int)) < 0)
warn("setsockopt TOS (ignored)");
}
#endif
return (0);
}
noport:
data_addr = myctladdr;
if (sendport)
data_addr.su_port = 0; /* let system pick one */
if (data != -1)
(void)close(data);
data = socket(data_addr.su_family, SOCK_STREAM, 0);
if (data < 0) {
warn("socket");
if (tmpno)
sendport = 1;
return (1);
}
if (!sendport)
if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
sizeof(on)) < 0) {
warn("setsockopt (reuse address)");
goto bad;
}
#ifdef IP_PORTRANGE
if (data_addr.su_family == AF_INET)
{
ports = restricted_data_ports ? IP_PORTRANGE_HIGH : IP_PORTRANGE_DEFAULT;
if (setsockopt(data, IPPROTO_IP, IP_PORTRANGE, (char *)&ports,
sizeof(ports)) < 0)
warn("setsockopt PORTRANGE (ignored)");
}
#endif
#ifdef INET6
#ifdef IPV6_PORTRANGE
if (data_addr.su_family == AF_INET6) {
ports = restricted_data_ports ? IPV6_PORTRANGE_HIGH
: IPV6_PORTRANGE_DEFAULT;
if (setsockopt(data, IPPROTO_IPV6, IPV6_PORTRANGE,
(char *)&ports, sizeof(ports)) < 0)
warn("setsockopt PORTRANGE (ignored)");
}
#endif
#endif
if (bind(data, (struct sockaddr *)&data_addr, data_addr.su_len) < 0) {
warn("bind");
goto bad;
}
if (options & SO_DEBUG &&
setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on,
sizeof(on)) < 0)
warn("setsockopt (ignored)");
len = sizeof(data_addr);
if (getsockname(data, (struct sockaddr *)&data_addr, &len) < 0) {
warn("getsockname");
goto bad;
}
if (listen(data, 1) < 0)
warn("listen");
if (sendport) {
char hname[INET6_ADDRSTRLEN];
int af;
struct sockaddr_in data_addr4;
union sockunion *daddr;
#ifdef INET6
if (data_addr.su_family == AF_INET6 &&
IN6_IS_ADDR_V4MAPPED(&data_addr.su_sin6.sin6_addr)) {
memset(&data_addr4, 0, sizeof(data_addr4));
data_addr4.sin_len = sizeof(struct sockaddr_in);
data_addr4.sin_family = AF_INET;
data_addr4.sin_port = data_addr.su_port;
memcpy((caddr_t)&data_addr4.sin_addr,
(caddr_t)&data_addr.su_sin6.sin6_addr.s6_addr[12],
sizeof(struct in_addr));
daddr = (union sockunion *)&data_addr4;
} else
#endif
daddr = &data_addr;
#define UC(b) (((int)b)&0xff)
switch (daddr->su_family) {
#ifdef INET6
case AF_INET6:
#endif
af = (daddr->su_family == AF_INET) ? 1 : 2;
if (getnameinfo((struct sockaddr *)daddr,
daddr->su_len, hname,
sizeof(hname) - 1, NULL, 0,
NI_NUMERICHOST|NI_WITHSCOPEID)) {
result = ERROR;
} else {
result = command("EPRT |%d|%s|%d|",
af, hname, ntohs(daddr->su_port));
}
break;
default:
result = COMPLETE + 1;
break;
}
if (result == COMPLETE)
goto skip_port;
p = (char *)&daddr->su_port;
switch (daddr->su_family) {
case AF_INET:
a = (char *)&daddr->su_sin.sin_addr;
result = command("PORT %d,%d,%d,%d,%d,%d",
UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
UC(p[0]), UC(p[1]));
break;
#ifdef INET6
case AF_INET6:
a = (char *)&daddr->su_sin6.sin6_addr;
result = command(
"LPRT %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]));
break;
#endif
default:
result = COMPLETE + 1; /* xxx */
}
skip_port:
if (result == ERROR && sendport == -1) {
sendport = 0;
tmpno = 1;
goto noport;
}
return (result != COMPLETE);
}
if (tmpno)
sendport = 1;
#ifdef IP_TOS
if (data_addr.su_family == AF_INET)
{
on = IPTOS_THROUGHPUT;
if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
warn("setsockopt TOS (ignored)");
}
#endif
return (0);
bad:
(void)close(data), data = -1;
if (tmpno)
sendport = 1;
return (1);
}
FILE *
dataconn(lmode)
const char *lmode;
{
union sockunion from;
int s, fromlen, tos;
fromlen = myctladdr.su_len;
if (passivemode)
return (fdopen(data, lmode));
s = accept(data, (struct sockaddr *) &from, &fromlen);
if (s < 0) {
warn("accept");
(void)close(data), data = -1;
return (NULL);
}
(void)close(data);
data = s;
#ifdef IP_TOS
if (data_addr.su_family == AF_INET)
{
tos = IPTOS_THROUGHPUT;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0)
warn("setsockopt TOS (ignored)");
}
#endif
return (fdopen(data, lmode));
}
void
psummary(notused)
int notused;
{
if (bytes > 0)
ptransfer(1);
}
void
psabort(notused)
int notused;
{
alarmtimer(0);
abrtflag++;
}
void
pswitch(flag)
int flag;
{
sig_t oldintr;
static struct comvars {
int connect;
char name[MAXHOSTNAMELEN];
union sockunion mctl;
union sockunion hctl;
FILE *in;
FILE *out;
int tpe;
int curtpe;
int cpnd;
int sunqe;
int runqe;
int mcse;
int ntflg;
char nti[17];
char nto[17];
int mapflg;
char mi[MAXPATHLEN];
char mo[MAXPATHLEN];
} proxstruct, tmpstruct;
struct comvars *ip, *op;
abrtflag = 0;
oldintr = signal(SIGINT, psabort);
if (flag) {
if (proxy)
return;
ip = &tmpstruct;
op = &proxstruct;
proxy++;
} else {
if (!proxy)
return;
ip = &proxstruct;
op = &tmpstruct;
proxy = 0;
}
ip->connect = connected;
connected = op->connect;
if (hostname) {
(void)strncpy(ip->name, hostname, sizeof(ip->name) - 1);
ip->name[sizeof(ip->name) - 1] = '\0';
} else
ip->name[0] = '\0';
hostname = op->name;
ip->hctl = hisctladdr;
hisctladdr = op->hctl;
ip->mctl = myctladdr;
myctladdr = op->mctl;
ip->in = cin;
cin = op->in;
ip->out = cout;
cout = op->out;
ip->tpe = type;
type = op->tpe;
ip->curtpe = curtype;
curtype = op->curtpe;
ip->cpnd = cpend;
cpend = op->cpnd;
ip->sunqe = sunique;
sunique = op->sunqe;
ip->runqe = runique;
runique = op->runqe;
ip->mcse = mcase;
mcase = op->mcse;
ip->ntflg = ntflag;
ntflag = op->ntflg;
(void)strncpy(ip->nti, ntin, sizeof(ip->nti) - 1);
(ip->nti)[sizeof(ip->nti) - 1] = '\0';
(void)strcpy(ntin, op->nti);
(void)strncpy(ip->nto, ntout, sizeof(ip->nto) - 1);
(ip->nto)[sizeof(ip->nto) - 1] = '\0';
(void)strcpy(ntout, op->nto);
ip->mapflg = mapflag;
mapflag = op->mapflg;
(void)strncpy(ip->mi, mapin, sizeof(ip->mi) - 1);
(ip->mi)[sizeof(ip->mi) - 1] = '\0';
(void)strcpy(mapin, op->mi);
(void)strncpy(ip->mo, mapout, sizeof(ip->mo) - 1);
(ip->mo)[sizeof(ip->mo) - 1] = '\0';
(void)strcpy(mapout, op->mo);
(void)signal(SIGINT, oldintr);
if (abrtflag) {
abrtflag = 0;
(*oldintr)(SIGINT);
}
}
void
abortpt(notused)
int notused;
{
alarmtimer(0);
putchar('\n');
(void)fflush(stdout);
ptabflg++;
mflag = 0;
abrtflag = 0;
longjmp(ptabort, 1);
}
void
proxtrans(cmd, local, remote)
const char *cmd, *local, *remote;
{
sig_t oldintr;
int prox_type, nfnd;
volatile int secndflag;
char *cmd2;
fd_set mask;
#ifdef __GNUC__ /* XXX: to shut up gcc warnings */
(void)&oldintr;
(void)&cmd2;
#endif
oldintr = NULL;
secndflag = 0;
if (strcmp(cmd, "RETR"))
cmd2 = "RETR";
else
cmd2 = runique ? "STOU" : "STOR";
if ((prox_type = type) == 0) {
if (unix_server && unix_proxy)
prox_type = TYPE_I;
else
prox_type = TYPE_A;
}
if (curtype != prox_type)
changetype(prox_type, 1);
if (try_epsv && command("EPSV") != COMPLETE)
try_epsv = 0;
if (!try_epsv && command("PASV") != COMPLETE) {
puts("proxy server does not support third party transfers.");
return;
}
pswitch(0);
if (!connected) {
puts("No primary connection.");
pswitch(1);
code = -1;
return;
}
if (curtype != prox_type)
changetype(prox_type, 1);
if (command("PORT %s", pasv) != COMPLETE) {
pswitch(1);
return;
}
if (setjmp(ptabort))
goto abort;
oldintr = signal(SIGINT, abortpt);
if (command("%s %s", cmd, remote) != PRELIM) {
(void)signal(SIGINT, oldintr);
pswitch(1);
return;
}
sleep(2);
pswitch(1);
secndflag++;
if (command("%s %s", cmd2, local) != PRELIM)
goto abort;
ptflag++;
(void)getreply(0);
pswitch(0);
(void)getreply(0);
(void)signal(SIGINT, oldintr);
pswitch(1);
ptflag = 0;
printf("local: %s remote: %s\n", local, remote);
return;
abort:
(void)signal(SIGINT, SIG_IGN);
ptflag = 0;
if (strcmp(cmd, "RETR") && !proxy)
pswitch(1);
else if (!strcmp(cmd, "RETR") && proxy)
pswitch(0);
if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
if (command("%s %s", cmd2, local) != PRELIM) {
pswitch(0);
if (cpend)
abort_remote((FILE *) NULL);
}
pswitch(1);
if (ptabflg)
code = -1;
(void)signal(SIGINT, oldintr);
return;
}
if (cpend)
abort_remote((FILE *) NULL);
pswitch(!proxy);
if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
if (command("%s %s", cmd2, local) != PRELIM) {
pswitch(0);
if (cpend)
abort_remote((FILE *) NULL);
pswitch(1);
if (ptabflg)
code = -1;
(void)signal(SIGINT, oldintr);
return;
}
}
if (cpend)
abort_remote((FILE *) NULL);
pswitch(!proxy);
if (cpend) {
FD_ZERO(&mask);
FD_SET(fileno(cin), &mask);
if ((nfnd = empty(&mask, 10)) <= 0) {
if (nfnd < 0) {
warn("abort");
}
if (ptabflg)
code = -1;
lostpeer();
}
(void)getreply(0);
(void)getreply(0);
}
if (proxy)
pswitch(0);
pswitch(1);
if (ptabflg)
code = -1;
(void)signal(SIGINT, oldintr);
}
void
reset(argc, argv)
int argc;
char *argv[];
{
fd_set mask;
int nfnd = 1;
FD_ZERO(&mask);
while (nfnd > 0) {
FD_SET(fileno(cin), &mask);
if ((nfnd = empty(&mask, 0)) < 0) {
warn("reset");
code = -1;
lostpeer();
}
else if (nfnd) {
(void)getreply(0);
}
}
}
char *
gunique(local)
const char *local;
{
static char new[MAXPATHLEN];
char *cp = strrchr(local, '/');
int d, count=0;
char ext = '1';
if (cp)
*cp = '\0';
d = access(cp == local ? "/" : cp ? local : ".", W_OK);
if (cp)
*cp = '/';
if (d < 0) {
warn("local: %s", local);
return ((char *) 0);
}
(void)strcpy(new, local);
cp = new + strlen(new);
*cp++ = '.';
while (!d) {
if (++count == 100) {
puts("runique: can't find unique file name.");
return ((char *) 0);
}
*cp++ = ext;
*cp = '\0';
if (ext == '9')
ext = '0';
else
ext++;
if ((d = access(new, F_OK)) < 0)
break;
if (ext != '0')
cp--;
else if (*(cp - 2) == '.')
*(cp - 1) = '1';
else {
*(cp - 2) = *(cp - 2) + 1;
cp--;
}
}
return (new);
}
void
abort_remote(din)
FILE *din;
{
char buf[BUFSIZ];
int nfnd;
fd_set mask;
if (cout == NULL) {
warnx("Lost control connection for abort.");
if (ptabflg)
code = -1;
lostpeer();
return;
}
/*
* send IAC in urgent mode instead of DM because 4.3BSD places oob mark
* after urgent byte rather than before as is protocol now
*/
sprintf(buf, "%c%c%c", IAC, IP, IAC);
if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
warn("abort");
fprintf(cout, "%cABOR\r\n", DM);
(void)fflush(cout);
FD_ZERO(&mask);
FD_SET(fileno(cin), &mask);
if (din) {
FD_SET(fileno(din), &mask);
}
if ((nfnd = empty(&mask, 10)) <= 0) {
if (nfnd < 0) {
warn("abort");
}
if (ptabflg)
code = -1;
lostpeer();
}
if (din && FD_ISSET(fileno(din), &mask)) {
while (read(fileno(din), buf, BUFSIZ) > 0)
/* LOOP */;
}
if (getreply(0) == ERROR && code == 552) {
/* 552 needed for nic style abort */
(void)getreply(0);
}
(void)getreply(0);
}
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