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main.c
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C/C++ Source or Header
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1996-09-28
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12KB
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593 lines
/*
* 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1985, 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 10/9/94";
#endif /* not lint */
/*
* FTP User Program -- Command Interface.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*#include <sys/ioctl.h>*/
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/ftp.h>
#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <version.h>
#include "ftp_var.h"
#define USAGE "Usage: %s [OPTION...] [HOST [PORT]]\n"
/* basename (argv[0]). NetBSD, linux, & gnu libc all define it. */
extern char *__progname;
/* Print a help message describing all options to STDOUT and exit with a
status of 0. */
static void
ohelp ()
{
fprintf (stdout, USAGE, __progname);
puts ("\n\
-d, --debug Turn on debugging mode\n\
-g, --no-glob Turn off file name globbing\n\
-i, --no-prompt Don't prompt during multiple-file transfers\n\
-n, --no-login Don't automatically login to the remove system\n\
-t, --trace Enable packet tracing\n\
-v, --verbose Be verbose\n\
--help Give this help list\n\
--version Print program version");
exit (0);
}
/* Print a message saying to use --help to STDERR, and exit with a status of
1. */
static void
try_help ()
{
fprintf (stderr, "Try `%s --help' for more information.\n", __progname);
exit (1);
}
/* Print a usage message to STDERR and exit with a status of 1. */
static void
usage ()
{
fprintf (stderr, USAGE, __progname);
try_help ();
}
static struct option long_options[] =
{
{ "trace", no_argument, 0, 't' },
{ "verbose", no_argument, 0, 'v' },
{ "no-login", no_argument, 0, 'n' },
{ "no-prompt", no_argument, 0, 'i' },
{ "debug", no_argument, 0, 'd' },
{ "no-glob", no_argument, 0, 'g' },
{ "help", no_argument, 0, '&' },
{ "version", no_argument, 0, 'V' },
{ 0 }
};
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, top;
struct passwd *pw = NULL;
char *cp;
#ifndef HAVE___PROGNAME
extern char *__progname;
__progname = argv[0];
#endif
sp = getservbyname("ftp", "tcp");
if (sp == 0)
errx(1, "ftp/tcp: unknown service");
doglob = 1;
interactive = 1;
autologin = 1;
while ((ch = getopt_long (argc, argv, "dgintv", long_options, 0))
!= EOF)
{
switch (ch) {
case 'd':
options |= SO_DEBUG;
debug++;
break;
case 'g':
doglob = 0;
break;
case 'i':
interactive = 0;
break;
case 'n':
autologin = 0;
break;
case 't':
trace++;
break;
case 'v':
verbose++;
break;
case '&':
ohelp ();
case 'V':
puts (inetutils_version);
exit (0);
case '?':
try_help ();
default:
usage ();
}
}
argc -= optind;
argv += optind;
fromatty = isatty(fileno(stdin));
if (fromatty)
verbose++;
cpend = 0; /* no pending replies */
proxy = 0; /* proxy not active */
passivemode = 0; /* passive mode not active */
crflag = 1; /* strip c.r. on ascii gets */
sendport = -1; /* not using ports */
/*
* 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) {
char *buf = malloc (strlen (pw->pw_dir) + 1);
if (buf) {
strcpy(buf, pw->pw_dir);
home = buf;
}
}
if (argc > 0) {
char *xargv[5];
extern char *__progname;
if (setjmp(toplevel))
exit(0);
(void) signal(SIGINT, intr);
(void) signal(SIGPIPE, lostpeer);
xargv[0] = __progname;
xargv[1] = argv[0];
xargv[2] = argv[1];
xargv[3] = argv[2];
xargv[4] = NULL;
setpeer(argc+1, xargv);
}
top = setjmp(toplevel) == 0;
if (top) {
(void) signal(SIGINT, intr);
(void) signal(SIGPIPE, lostpeer);
}
for (;;) {
cmdscanner(top);
top = 1;
}
}
void
intr()
{
longjmp(toplevel, 1);
}
void
lostpeer()
{
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);
}
/*
char *
tail(filename)
char *filename;
{
char *s;
while (*filename) {
s = strrchr(filename, '/');
if (s == NULL)
break;
if (s[1])
return (s + 1);
*s = '\0';
}
return (filename);
}
*/
/*
* Command parser.
*/
void
cmdscanner(top)
int top;
{
struct cmd *c;
int l;
if (!top)
(void) putchar('\n');
for (;;) {
if (fromatty) {
printf("ftp> ");
(void) fflush(stdout);
}
if (fgets(line, sizeof line, stdin) == NULL)
quit(0, 0);
l = strlen(line);
if (l == 0)
break;
if (line[--l] == '\n') {
if (l == 0)
break;
line[l] = '\0';
} else if (l == sizeof(line) - 2) {
printf("sorry, input line too long\n");
while ((l = getchar()) != '\n' && l != EOF)
/* void */;
break;
} /* else it was a line without a newline */
makeargv();
if (margc == 0) {
continue;
}
c = getcmd(margv[0]);
if (c == (struct cmd *)-1) {
printf("?Ambiguous command\n");
continue;
}
if (c == 0) {
printf("?Invalid command\n");
continue;
}
if (c->c_conn && !connected) {
printf("Not connected.\n");
continue;
}
(*c->c_handler)(margc, margv);
if (bell && c->c_bell)
(void) putchar('\007');
if (c->c_handler != help)
break;
}
(void) signal(SIGINT, intr);
(void) signal(SIGPIPE, lostpeer);
}
struct cmd *
getcmd(name)
char *name;
{
char *p, *q;
struct cmd *c, *found;
int nmatches, longest;
longest = 0;
nmatches = 0;
found = 0;
for (c = cmdtab; p = c->c_name; 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;
margc = 0;
argp = margv;
stringbase = line; /* scan from first of buffer */
argbase = argbuf; /* store from first of buffer */
slrflag = 0;
while (*argp++ = slurpstring())
margc++;
}
/*
* 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++;
stringbase++;
return ((*sb == '!') ? "!" : "$");
/* NOTREACHED */
case 1:
slrflag++;
altarg = stringbase;
break;
default:
break;
}
}
S0:
switch (*sb) {
case '\0':
goto OUT;
case ' ':
case '\t':
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 '\\':
sb++; goto S2; /* slurp next character */
case '"':
sb++; goto S3; /* slurp quoted string */
default:
*ap++ = *sb++; /* add character to token */
got_one = 1;
goto S1;
}
S2:
switch (*sb) {
case '\0':
goto OUT;
default:
*ap++ = *sb++;
got_one = 1;
goto S1;
}
S3:
switch (*sb) {
case '\0':
goto OUT;
case '"':
sb++; goto S1;
default:
*ap++ = *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);
}
#define HELPINDENT ((int) sizeof ("directory"))
/*
* 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) {
int i, j, w, k;
int columns, width = 0, lines;
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
int len = strlen(c->c_name);
if (len > width)
width = len;
}
width = (width + 8) &~ 7;
columns = 80 / width;
if (columns == 0)
columns = 1;
lines = (NCMDS + columns - 1) / columns;
for (i = 0; i < lines; i++) {
for (j = 0; j < columns; j++) {
c = cmdtab + j * lines + i;
if (c->c_name && (!proxy || c->c_proxy)) {
printf("%s", c->c_name);
}
else if (c->c_name) {
for (k=0; k < strlen(c->c_name); k++) {
(void) putchar(' ');
}
}
if (c + lines >= &cmdtab[NCMDS]) {
printf("\n");
break;
}
w = strlen(c->c_name);
while (w < width) {
w = (w + 8) &~ 7;
(void) putchar('\t');
}
}
}
return;
}
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);
}
}