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freebsd/usr.bin/ftp/main.c
Yoshinobu Inoue 1132b408c5 Add -4 and -6 options. 
Current getaddrinfo() implemetation has a problem of too much resolving
 waiting time on INET6 enabled systems.
 -4 and -6 options can limit name resolving address family and is a possible
 workaround for the problem.

Approved by: jkh
2000-02-15 15:11:40 +00:00

717 lines
14 KiB
C
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/* $FreeBSD$ */
/* $NetBSD: main.c,v 1.26 1997/10/14 16:31:22 christos 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
__COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\
\tThe Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 10/9/94";
#else
__RCSID("$FreeBSD$");
__RCSID_SOURCE("$NetBSD: main.c,v 1.26 1997/10/14 16:31:22 christos Exp $");
#endif
#endif /* not lint */
/*
* FTP User Program -- Command Interface.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <locale.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ftp_var.h"
#include "pathnames.h"
int family = AF_UNSPEC;
int main __P((int, char **));
int
main(argc, argv)
int argc;
char *argv[];
{
struct servent *sp;
int ch, top, rval;
long port;
struct passwd *pw = NULL;
char *cp, *ep, homedir[MAXPATHLEN], *s;
int dumbterm;
char *src_addr = NULL;
(void) setlocale(LC_ALL, "");
ftpport = "ftp";
httpport = "http";
gateport = NULL;
cp = getenv("FTPSERVERPORT");
if (cp != NULL)
gateport = cp;
if (!gateport)
gateport = "ftpgate";
doglob = 1;
interactive = 1;
autologin = 1;
passivemode = 0;
restricted_data_ports = 1;
preserve = 1;
verbose = 0;
progress = 0;
gatemode = 0;
#ifndef SMALL
editing = 0;
el = NULL;
hist = NULL;
#endif
mark = HASHBYTES;
marg_sl = sl_init();
if ((tmpdir = getenv("TMPDIR")) == NULL)
tmpdir = _PATH_TMP;
cp = strrchr(argv[0], '/');
cp = (cp == NULL) ? argv[0] : cp + 1;
if ((s = getenv("FTP_PASSIVE_MODE")) != NULL
&& strcasecmp(s, "no") != 0)
passivemode = 1;
if (strcmp(cp, "pftp") == 0)
passivemode = 1;
else if (strcmp(cp, "gate-ftp") == 0)
gatemode = 1;
gateserver = getenv("FTPSERVER");
if (gateserver == NULL || *gateserver == '\0')
gateserver = GATE_SERVER;
if (gatemode) {
if (*gateserver == '\0') {
warnx(
"Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp");
gatemode = 0;
}
}
cp = getenv("TERM");
if (cp == NULL || strcmp(cp, "dumb") == 0)
dumbterm = 1;
else
dumbterm = 0;
fromatty = isatty(fileno(stdin));
if (fromatty) {
verbose = 1; /* verbose if from a tty */
#ifndef SMALL
if (! dumbterm)
editing = 1; /* editing mode on if tty is usable */
#endif
}
if (isatty(fileno(stdout)) && !dumbterm)
progress = 1; /* progress bar on if tty is usable */
while ((ch = getopt(argc, argv, "46adeginpP:s:tUvV")) != -1) {
switch (ch) {
case '4':
family = AF_INET;
break;
#ifdef INET6
case '6':
family = AF_INET6;
break;
#endif
case 'a':
anonftp = 1;
break;
case 'd':
options |= SO_DEBUG;
debug++;
break;
case 'e':
#ifndef SMALL
editing = 0;
#endif
break;
case 'g':
doglob = 0;
break;
case 'i':
interactive = 0;
break;
case 'n':
autologin = 0;
break;
case 'p':
passivemode = 1;
break;
case 'P':
ftpport = optarg;
break;
case 's':
dobind = 1;
src_addr = optarg;
break;
case 't':
trace = 1;
break;
case 'U':
restricted_data_ports = 0;
break;
case 'v':
verbose = 1;
break;
case 'V':
verbose = 0;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
cpend = 0; /* no pending replies */
proxy = 0; /* proxy not active */
crflag = 1; /* strip c.r. on ascii gets */
sendport = -1; /* not using ports */
if (dobind) {
struct addrinfo hints;
struct addrinfo *res;
char *ftpdataport = "ftp-data";
int error;
memset(&hints, 0, sizeof(hints));
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo(src_addr, NULL, &hints, &res);
if (error) {
warnx("%s: %s", src_addr, gai_strerror(error));
if (error == EAI_SYSTEM)
warnx("%s", strerror(errno));
exit(1);
}
bindres0 = res;
}
/*
* Set up the home directory in case we're globbing.
*/
cp = getlogin();
if (cp != NULL) {
pw = getpwnam(cp);
}
if (pw == NULL)
pw = getpwuid(getuid());
if (pw != NULL) {
home = homedir;
(void)strcpy(home, pw->pw_dir);
}
setttywidth(0);
(void)signal(SIGWINCH, setttywidth);
#ifdef __GNUC__ /* XXX: to shut up gcc warnings */
(void)&argc;
(void)&argv;
#endif
if (argc > 0) {
if (isurl(argv[0])) {
anonftp = 1; /* Handle "automatic" transfers. */
rval = auto_fetch(argc, argv);
if (rval >= 0) /* -1 == connected and cd-ed */
exit(rval);
} else {
char *xargv[4], **xargp = xargv;
#ifdef __GNUC__ /* XXX: to shut up gcc warnings */
(void)&xargp;
#endif
if (setjmp(toplevel))
exit(0);
(void)signal(SIGINT, (sig_t)intr);
(void)signal(SIGPIPE, (sig_t)lostpeer);
*xargp++ = __progname;
*xargp++ = argv[0]; /* host */
if (argc > 1)
*xargp++ = argv[1]; /* port */
*xargp = NULL;
setpeer(xargp-xargv, xargv);
}
}
#ifndef SMALL
controlediting();
#endif /* !SMALL */
top = setjmp(toplevel) == 0;
if (top) {
(void)signal(SIGINT, (sig_t)intr);
(void)signal(SIGPIPE, (sig_t)lostpeer);
}
for (;;) {
cmdscanner(top);
top = 1;
}
}
void
intr()
{
alarmtimer(0);
longjmp(toplevel, 1);
}
void
lostpeer()
{
alarmtimer(0);
if (connected) {
if (cout != NULL) {
(void)shutdown(fileno(cout), 1+1);
(void)fclose(cout);
cout = NULL;
}
if (data >= 0) {
(void)shutdown(data, 1+1);
(void)close(data);
data = -1;
}
connected = 0;
}
pswitch(1);
if (connected) {
if (cout != NULL) {
(void)shutdown(fileno(cout), 1+1);
(void)fclose(cout);
cout = NULL;
}
connected = 0;
}
proxflag = 0;
pswitch(0);
}
/*
* Generate a prompt
*/
char *
prompt()
{
return ("ftp> ");
}
/*
* Command parser.
*/
void
cmdscanner(top)
int top;
{
struct cmd *c;
int num;
if (!top
#ifndef SMALL
&& !editing
#endif /* !SMALL */
)
(void)putchar('\n');
for (;;) {
#ifndef SMALL
if (!editing) {
#endif /* !SMALL */
if (fromatty) {
fputs(prompt(), stdout);
(void)fflush(stdout);
}
if (fgets(line, sizeof(line), stdin) == NULL)
quit(0, 0);
num = strlen(line);
if (num == 0)
break;
if (line[--num] == '\n') {
if (num == 0)
break;
line[num] = '\0';
} else if (num == sizeof(line) - 2) {
puts("sorry, input line too long.");
while ((num = getchar()) != '\n' && num != EOF)
/* void */;
break;
} /* else it was a line without a newline */
#ifndef SMALL
} else {
const char *buf;
cursor_pos = NULL;
if ((buf = el_gets(el, &num)) == NULL || num == 0)
quit(0, 0);
if (line[--num] == '\n') {
if (num == 0)
break;
} else if (num >= sizeof(line)) {
puts("sorry, input line too long.");
break;
}
memcpy(line, buf, num);
line[num] = '\0';
history(hist, H_ENTER, buf);
}
#endif /* !SMALL */
makeargv();
if (margc == 0)
continue;
#if 0 && !defined(SMALL) /* XXX: don't want el_parse */
/*
* el_parse returns -1 to signal that it's not been handled
* internally.
*/
if (el_parse(el, margc, margv) != -1)
continue;
#endif /* !SMALL */
c = getcmd(margv[0]);
if (c == (struct cmd *)-1) {
puts("?Ambiguous command.");
continue;
}
if (c == 0) {
puts("?Invalid command.");
continue;
}
if (c->c_conn && !connected) {
puts("Not connected.");
continue;
}
confirmrest = 0;
(*c->c_handler)(margc, margv);
if (bell && c->c_bell)
(void)putchar('\007');
if (c->c_handler != help)
break;
}
(void)signal(SIGINT, (sig_t)intr);
(void)signal(SIGPIPE, (sig_t)lostpeer);
}
struct cmd *
getcmd(name)
const char *name;
{
const char *p, *q;
struct cmd *c, *found;
int nmatches, longest;
if (name == NULL)
return (0);
longest = 0;
nmatches = 0;
found = 0;
for (c = cmdtab; (p = c->c_name) != NULL; c++) {
for (q = name; *q == *p++; q++)
if (*q == 0) /* exact match? */
return (c);
if (!*q) { /* the name was a prefix */
if (q - name > longest) {
longest = q - name;
nmatches = 1;
found = c;
} else if (q - name == longest)
nmatches++;
}
}
if (nmatches > 1)
return ((struct cmd *)-1);
return (found);
}
/*
* Slice a string up into argc/argv.
*/
int slrflag;
void
makeargv()
{
char *argp;
stringbase = line; /* scan from first of buffer */
argbase = argbuf; /* store from first of buffer */
slrflag = 0;
marg_sl->sl_cur = 0; /* reset to start of marg_sl */
for (margc = 0; ; margc++) {
argp = slurpstring();
sl_add(marg_sl, argp);
if (argp == NULL)
break;
}
#ifndef SMALL
if (cursor_pos == line) {
cursor_argc = 0;
cursor_argo = 0;
} else if (cursor_pos != NULL) {
cursor_argc = margc;
cursor_argo = strlen(margv[margc-1]);
}
#endif /* !SMALL */
}
#ifdef SMALL
#define INC_CHKCURSOR(x) (x)++
#else /* !SMALL */
#define INC_CHKCURSOR(x) { (x)++ ; \
if (x == cursor_pos) { \
cursor_argc = margc; \
cursor_argo = ap-argbase; \
cursor_pos = NULL; \
} }
#endif /* !SMALL */
/*
* Parse string into argbuf;
* implemented with FSM to
* handle quoting and strings
*/
char *
slurpstring()
{
int got_one = 0;
char *sb = stringbase;
char *ap = argbase;
char *tmp = argbase; /* will return this if token found */
if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */
switch (slrflag) { /* and $ as token for macro invoke */
case 0:
slrflag++;
INC_CHKCURSOR(stringbase);
return ((*sb == '!') ? "!" : "$");
/* NOTREACHED */
case 1:
slrflag++;
altarg = stringbase;
break;
default:
break;
}
}
S0:
switch (*sb) {
case '\0':
goto OUT;
case ' ':
case '\t':
INC_CHKCURSOR(sb);
goto S0;
default:
switch (slrflag) {
case 0:
slrflag++;
break;
case 1:
slrflag++;
altarg = sb;
break;
default:
break;
}
goto S1;
}
S1:
switch (*sb) {
case ' ':
case '\t':
case '\0':
goto OUT; /* end of token */
case '\\':
INC_CHKCURSOR(sb);
goto S2; /* slurp next character */
case '"':
INC_CHKCURSOR(sb);
goto S3; /* slurp quoted string */
default:
*ap = *sb; /* add character to token */
ap++;
INC_CHKCURSOR(sb);
got_one = 1;
goto S1;
}
S2:
switch (*sb) {
case '\0':
goto OUT;
default:
*ap = *sb;
ap++;
INC_CHKCURSOR(sb);
got_one = 1;
goto S1;
}
S3:
switch (*sb) {
case '\0':
goto OUT;
case '"':
INC_CHKCURSOR(sb);
goto S1;
default:
*ap = *sb;
ap++;
INC_CHKCURSOR(sb);
got_one = 1;
goto S3;
}
OUT:
if (got_one)
*ap++ = '\0';
argbase = ap; /* update storage pointer */
stringbase = sb; /* update scan pointer */
if (got_one) {
return (tmp);
}
switch (slrflag) {
case 0:
slrflag++;
break;
case 1:
slrflag++;
altarg = (char *) 0;
break;
default:
break;
}
return ((char *)0);
}
/*
* Help command.
* Call each command handler with argc == 0 and argv[0] == name.
*/
void
help(argc, argv)
int argc;
char *argv[];
{
struct cmd *c;
if (argc == 1) {
StringList *buf;
buf = sl_init();
printf("%sommands may be abbreviated. Commands are:\n\n",
proxy ? "Proxy c" : "C");
for (c = cmdtab; c < &cmdtab[NCMDS]; c++)
if (c->c_name && (!proxy || c->c_proxy))
sl_add(buf, c->c_name);
list_vertical(buf);
sl_free(buf, 0);
return;
}
#define HELPINDENT ((int) sizeof("disconnect"))
while (--argc > 0) {
char *arg;
arg = *++argv;
c = getcmd(arg);
if (c == (struct cmd *)-1)
printf("?Ambiguous help command %s\n", arg);
else if (c == (struct cmd *)0)
printf("?Invalid help command %s\n", arg);
else
printf("%-*s\t%s\n", HELPINDENT,
c->c_name, c->c_help);
}
}
void
usage()
{
(void)fprintf(stderr,
"usage: %s [-46adeginptUvV] [-P port] [-s src_addr] [host [port]]\n"
" %s host:path[/]\n"
" %s ftp://host[:port]/path[/]\n"
" %s http://host[:port]/file\n",
__progname, __progname, __progname, __progname);
exit(1);
}
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