Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ftp/main.c	Lines:	0	411	0.0 %
Date:	2016-12-06	Branches:	0	317	0.0 %


/*	$OpenBSD: main.c,v 1.109 2016/07/13 16:35:47 jsing Exp $	*/
/*	$NetBSD: main.c,v 1.24 1997/08/18 10:20:26 lukem Exp $	*/

/*
 * Copyright (C) 1997 and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * 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. 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.
 */

/*
 * FTP User Program -- Command Interface.
 */
#include <sys/types.h>
#include <sys/socket.h>

#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <tls.h>

#include "cmds.h"
#include "ftp_var.h"

#ifndef SMALL
char * const ssl_verify_opts[] = {
#define SSL_CAFILE	0
	"cafile",
#define SSL_CAPATH	1
	"capath",
#define SSL_CIPHERS	2
	"ciphers",
#define SSL_DONTVERIFY	3
	"dont",
#define SSL_DOVERIFY	4
	"do",
#define SSL_VERIFYDEPTH	5
	"depth",
	NULL
};

struct tls_config *tls_config;
#endif /* !SMALL */

int family = PF_UNSPEC;
int pipeout;

int
main(volatile int argc, char *argv[])
{
	int ch, top, rval;
	struct passwd *pw = NULL;
	char *cp, homedir[PATH_MAX];
	char *outfile = NULL;
	const char *errstr;
	int dumb_terminal = 0;
#ifndef SMALL
	long long depth;
#endif

	ftpport = "ftp";
	httpport = "http";
#ifndef SMALL
	httpsport = "https";
#endif /* !SMALL */
	gateport = getenv("FTPSERVERPORT");
	if (gateport == NULL || *gateport == '\0')
		gateport = "ftpgate";
	doglob = 1;
	interactive = 1;
	autologin = 1;
	passivemode = 1;
	activefallback = 1;
	preserve = 1;
	verbose = 0;
	progress = 0;
	gatemode = 0;
#ifndef SMALL
	editing = 0;
	el = NULL;
	hist = NULL;
	cookiefile = NULL;
	resume = 0;
	srcaddr = NULL;
	marg_sl = sl_init();
#endif /* !SMALL */
	mark = HASHBYTES;
	epsv4 = 1;
	epsv4bad = 0;

	/* Set default operation mode based on FTPMODE environment variable */
	if ((cp = getenv("FTPMODE")) != NULL && *cp != '\0') {
		if (strcmp(cp, "passive") == 0) {
			passivemode = 1;
			activefallback = 0;
		} else if (strcmp(cp, "active") == 0) {
			passivemode = 0;
			activefallback = 0;
		} else if (strcmp(cp, "gate") == 0) {
			gatemode = 1;
		} else if (strcmp(cp, "auto") == 0) {
			passivemode = 1;
			activefallback = 1;
		} else
			warnx("unknown FTPMODE: %s.  Using defaults", cp);
	}

	if (strcmp(__progname, "gate-ftp") == 0)
		gatemode = 1;
	gateserver = getenv("FTPSERVER");
	if (gateserver == NULL)
		gateserver = "";
	if (gatemode) {
		if (*gateserver == '\0') {
			warnx(
"Neither $FTPSERVER nor $GATE_SERVER is defined; disabling gate-ftp");
			gatemode = 0;
		}
	}

	cp = getenv("TERM");
	dumb_terminal = (cp == NULL || *cp == '\0' || !strcmp(cp, "dumb") ||
	    !strcmp(cp, "emacs") || !strcmp(cp, "su"));
	fromatty = isatty(fileno(stdin));
	if (fromatty) {
		verbose = 1;		/* verbose if from a tty */
#ifndef SMALL
		if (!dumb_terminal)
			editing = 1;	/* editing mode on if tty is usable */
#endif /* !SMALL */
	}

	ttyout = stdout;
	if (isatty(fileno(ttyout)) && !dumb_terminal && foregroundproc())
		progress = 1;		/* progress bar on if tty is usable */

#ifndef SMALL
	cookiefile = getenv("http_cookies");
	if (tls_init() != 0)
		errx(1, "tls init failed");
	if (tls_config == NULL) {
		tls_config = tls_config_new();
		if (tls_config == NULL)
			errx(1, "tls config failed");
		tls_config_set_protocols(tls_config, TLS_PROTOCOLS_ALL);
		if (tls_config_set_ciphers(tls_config, "all") != 0)
			errx(1, "tls set ciphers failed");
	}
#endif /* !SMALL */

	httpuseragent = NULL;

	while ((ch = getopt(argc, argv,
		    "46AaCc:dD:Eegik:Mmno:pP:r:S:s:tU:vV")) != -1) {
		switch (ch) {
		case '4':
			family = PF_INET;
			break;
		case '6':
			family = PF_INET6;
			break;
		case 'A':
			activefallback = 0;
			passivemode = 0;
			break;

		case 'a':
			anonftp = 1;
			break;

		case 'C':
#ifndef SMALL
			resume = 1;
#endif /* !SMALL */
			break;

		case 'c':
#ifndef SMALL
			cookiefile = optarg;
#endif /* !SMALL */
			break;

		case 'D':
			action = optarg;
			break;
		case 'd':
#ifndef SMALL
			options |= SO_DEBUG;
			debug++;
#endif /* !SMALL */
			break;

		case 'E':
			epsv4 = 0;
			break;

		case 'e':
#ifndef SMALL
			editing = 0;
#endif /* !SMALL */
			break;

		case 'g':
			doglob = 0;
			break;

		case 'i':
			interactive = 0;
			break;

		case 'k':
			keep_alive_timeout = strtonum(optarg, 0, INT_MAX,
			    &errstr);
			if (errstr != NULL) {
				warnx("keep alive amount is %s: %s", errstr,
					optarg);
				usage();
			}
			break;
		case 'M':
			progress = 0;
			break;
		case 'm':
			progress = -1;
			break;

		case 'n':
			autologin = 0;
			break;

		case 'o':
			outfile = optarg;
			if (*outfile == '\0') {
				pipeout = 0;
				outfile = NULL;
				ttyout = stdout;
			} else {
				pipeout = strcmp(outfile, "-") == 0;
				ttyout = pipeout ? stderr : stdout;
			}
			break;

		case 'p':
			passivemode = 1;
			activefallback = 0;
			break;

		case 'P':
			ftpport = optarg;
			break;

		case 'r':
			retry_connect = strtonum(optarg, 0, INT_MAX, &errstr);
			if (errstr != NULL) {
				warnx("retry amount is %s: %s", errstr,
					optarg);
				usage();
			}
			break;

		case 'S':
#ifndef SMALL
			cp = optarg;
			while (*cp) {
				char	*str;
				switch (getsubopt(&cp, ssl_verify_opts, &str)) {
				case SSL_CAFILE:
					if (str == NULL)
						errx(1, "missing CA file");
					if (tls_config_set_ca_file(
					    tls_config, str) != 0)
						errx(1, "tls ca file failed");
					break;
				case SSL_CAPATH:
					if (str == NULL)
						errx(1, "missing CA directory"
						    " path");
					if (tls_config_set_ca_path(
					    tls_config, str) != 0)
						errx(1, "tls ca path failed");
					break;
				case SSL_CIPHERS:
					if (str == NULL)
						errx(1, "missing cipher list");
					if (tls_config_set_ciphers(
					    tls_config, str) != 0)
						errx(1, "tls ciphers failed");
					break;
				case SSL_DONTVERIFY:
					tls_config_insecure_noverifycert(
					    tls_config);
					tls_config_insecure_noverifyname(
					    tls_config);
					break;
				case SSL_DOVERIFY:
					tls_config_verify(tls_config);
					break;
				case SSL_VERIFYDEPTH:
					if (str == NULL)
						errx(1, "missing depth");
					depth = strtonum(str, 0, INT_MAX,
					    &errstr);
					if (errstr)
						errx(1, "certificate "
						    "validation depth is %s",
						    errstr);
					tls_config_set_verify_depth(
					    tls_config, (int)depth);
					break;
				default:
					errx(1, "unknown -S suboption `%s'",
					    suboptarg ? suboptarg : "");
					/* NOTREACHED */
				}
			}
#endif
			break;

		case 's':
#ifndef SMALL
			srcaddr = optarg;
#endif /* !SMALL */
			break;

		case 't':
			trace = 1;
			break;

#ifndef SMALL
		case 'U':
			free (httpuseragent);
			if (strcspn(optarg, "\r\n") != strlen(optarg))
				errx(1, "Invalid User-Agent: %s.", optarg);
			if (asprintf(&httpuseragent, "User-Agent: %s",
			    optarg) == -1)
				errx(1, "Can't allocate memory for HTTP(S) "
				    "User-Agent");
			break;
#endif /* !SMALL */

		case 'v':
			verbose = 1;
			break;

		case 'V':
			verbose = 0;
			break;

		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

#ifndef SMALL
	cookie_load();
#endif /* !SMALL */
	if (httpuseragent == NULL)
		httpuseragent = HTTP_USER_AGENT;

	cpend = 0;	/* no pending replies */
	proxy = 0;	/* proxy 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) {
		(void)strlcpy(homedir, pw->pw_dir, sizeof homedir);
		home = homedir;
	}

	setttywidth(0);
	(void)signal(SIGWINCH, setttywidth);

	if (argc > 0) {
		if (isurl(argv[0])) {
			if (pipeout) {
#ifndef SMALL
				if (pledge("stdio rpath dns tty inet proc exec fattr",
				    NULL) == -1)
					err(1, "pledge");
#else
				if (pledge("stdio rpath dns tty inet fattr",
				    NULL) == -1)
					err(1, "pledge");
#endif
			} else {
#ifndef SMALL
				if (pledge("stdio rpath wpath cpath dns tty inet proc exec fattr",
				    NULL) == -1)
					err(1, "pledge");
#else
				if (pledge("stdio rpath wpath cpath dns tty inet fattr",
				    NULL) == -1)
					err(1, "pledge");
#endif
			}

			rval = auto_fetch(argc, argv, outfile);
			if (rval >= 0)		/* -1 == connected and cd-ed */
				exit(rval);
		} else {
#ifndef SMALL
			char *xargv[5];

			if (setjmp(toplevel))
				exit(0);
			(void)signal(SIGINT, (sig_t)intr);
			(void)signal(SIGPIPE, (sig_t)lostpeer);
			xargv[0] = __progname;
			xargv[1] = argv[0];
			xargv[2] = argv[1];
			xargv[3] = argv[2];
			xargv[4] = NULL;
			do {
				setpeer(argc+1, xargv);
				if (!retry_connect)
					break;
				if (!connected) {
					macnum = 0;
					fputs("Retrying...\n", ttyout);
					sleep(retry_connect);
				}
			} while (!connected);
			retry_connect = 0; /* connected, stop hiding msgs */
#endif /* !SMALL */
		}
	}
#ifndef SMALL
	controlediting();
	top = setjmp(toplevel) == 0;
	if (top) {
		(void)signal(SIGINT, (sig_t)intr);
		(void)signal(SIGPIPE, (sig_t)lostpeer);
	}
	for (;;) {
		cmdscanner(top);
		top = 1;
	}
#else /* !SMALL */
	usage();
#endif /* !SMALL */
}

void
intr(void)
{
	int save_errno = errno;

	write(fileno(ttyout), "\n\r", 2);
	alarmtimer(0);

	errno = save_errno;
	longjmp(toplevel, 1);
}

void
lostpeer(void)
{
	int save_errno = errno;

	alarmtimer(0);
	if (connected) {
		if (cout != NULL) {
			(void)shutdown(fileno(cout), SHUT_RDWR);
			(void)fclose(cout);
			cout = NULL;
		}
		if (data >= 0) {
			(void)shutdown(data, SHUT_RDWR);
			(void)close(data);
			data = -1;
		}
		connected = 0;
	}
	pswitch(1);
	if (connected) {
		if (cout != NULL) {
			(void)shutdown(fileno(cout), SHUT_RDWR);
			(void)fclose(cout);
			cout = NULL;
		}
		connected = 0;
	}
	proxflag = 0;
	pswitch(0);
	errno = save_errno;
}

#ifndef SMALL
/*
 * Generate a prompt
 */
char *
prompt(void)
{
	return ("ftp> ");
}

/*
 * Command parser.
 */
void
cmdscanner(int top)
{
	struct cmd *c;
	int num;
	HistEvent hev;

	if (!top && !editing)
		(void)putc('\n', ttyout);
	for (;;) {
		if (!editing) {
			if (fromatty) {
				fputs(prompt(), ttyout);
				(void)fflush(ttyout);
			}
			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) {
				fputs("sorry, input line too long.\n", ttyout);
				while ((num = getchar()) != '\n' && num != EOF)
					/* void */;
				break;
			} /* else it was a line without a newline */
		} else {
			const char *buf;
			cursor_pos = NULL;

			if ((buf = el_gets(el, &num)) == NULL || num == 0) {
				putc('\n', ttyout);
				fflush(ttyout);
				quit(0, 0);
			}
			if (buf[--num] == '\n') {
				if (num == 0)
					break;
			}
			if (num >= sizeof(line)) {
				fputs("sorry, input line too long.\n", ttyout);
				break;
			}
			memcpy(line, buf, (size_t)num);
			line[num] = '\0';
			history(hist, &hev, H_ENTER, buf);
		}

		makeargv();
		if (margc == 0)
			continue;
		c = getcmd(margv[0]);
		if (c == (struct cmd *)-1) {
			fputs("?Ambiguous command.\n", ttyout);
			continue;
		}
		if (c == 0) {
			/*
			 * Give editline(3) a shot at unknown commands.
			 * XXX - bogus commands with a colon in
			 *       them will not elicit an error.
			 */
			if (editing &&
			    el_parse(el, margc, (const char **)margv) != 0)
				fputs("?Invalid command.\n", ttyout);
			continue;
		}
		if (c->c_conn && !connected) {
			fputs("Not connected.\n", ttyout);
			continue;
		}
		confirmrest = 0;
		(*c->c_handler)(margc, margv);
		if (bell && c->c_bell)
			(void)putc('\007', ttyout);
		if (c->c_handler != help)
			break;
	}
	(void)signal(SIGINT, (sig_t)intr);
	(void)signal(SIGPIPE, (sig_t)lostpeer);
}

struct cmd *
getcmd(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(void)
{
	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;
	}
	if (cursor_pos == line) {
		cursor_argc = 0;
		cursor_argo = 0;
	} else if (cursor_pos != NULL) {
		cursor_argc = margc;
		cursor_argo = strlen(margv[margc-1]);
	}
}

#define INC_CHKCURSOR(x)	{ (x)++ ; \
				if (x == cursor_pos) { \
					cursor_argc = margc; \
					cursor_argo = ap-argbase; \
					cursor_pos = NULL; \
				} }

/*
 * Parse string into argbuf;
 * implemented with FSM to
 * handle quoting and strings
 */
char *
slurpstring(void)
{
	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 (NULL);
}

/*
 * Help command.
 * Call each command handler with argc == 0 and argv[0] == name.
 */
void
help(int argc, char *argv[])
{
	struct cmd *c;

	if (argc == 1) {
		StringList *buf;

		buf = sl_init();
		fprintf(ttyout, "%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)
			fprintf(ttyout, "?Ambiguous help command %s\n", arg);
		else if (c == NULL)
			fprintf(ttyout, "?Invalid help command %s\n", arg);
		else
			fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
				c->c_name, c->c_help);
	}
}
#endif /* !SMALL */

void
usage(void)
{
	fprintf(stderr, "usage: "
#ifndef SMALL
	    "%1$s [-46AadEegiMmnptVv] [-D title] [-k seconds] [-P port] "
	    "[-r seconds]\n"
	    "           [-s srcaddr] [host [port]]\n"
	    "       %1$s [-C] [-o output] [-s srcaddr]\n"
	    "           ftp://[user:password@]host[:port]/file[/] ...\n"
	    "       %1$s [-C] [-c cookie] [-o output] [-S ssl_options] "
	    "[-s srcaddr]\n"
	    "           [-U useragent] "
	    "http[s]://[user:password@]host[:port]/file ...\n"
	    "       %1$s [-C] [-o output] [-s srcaddr] file:file ...\n"
	    "       %1$s [-C] [-o output] [-s srcaddr] host:/file[/] ...\n",
#else /* !SMALL */
	    "%1$s [-o output] ftp://[user:password@]host[:port]/file[/] ...\n"
	    "       %1$s [-o output] http://host[:port]/file ...\n"
	    "       %1$s [-o output] file:file ...\n"
	    "       %1$s [-o output] host:/file[/] ...\n",
#endif /* !SMALL */
	    __progname);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: main.c,v 1.109 2016/07/13 16:35:47 jsing Exp $ */
2			/* $NetBSD: main.c,v 1.24 1997/08/18 10:20:26 lukem Exp $ */
3
4			/*
5			* Copyright (C) 1997 and 1998 WIDE Project.
6			* All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the project nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			/*
34			* Copyright (c) 1985, 1989, 1993, 1994
35			* The Regents of the University of California. All rights reserved.
36			*
37			* Redistribution and use in source and binary forms, with or without
38			* modification, are permitted provided that the following conditions
39			* are met:
40			* 1. Redistributions of source code must retain the above copyright
41			* notice, this list of conditions and the following disclaimer.
42			* 2. Redistributions in binary form must reproduce the above copyright
43			* notice, this list of conditions and the following disclaimer in the
44			* documentation and/or other materials provided with the distribution.
45			* 3. Neither the name of the University nor the names of its contributors
46			* may be used to endorse or promote products derived from this software
47			* without specific prior written permission.
48			*
49			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59			* SUCH DAMAGE.
60			*/
61
62			/*
63			* FTP User Program -- Command Interface.
64			*/
65			#include <sys/types.h>
66			#include <sys/socket.h>
67
68			#include <ctype.h>
69			#include <err.h>
70			#include <netdb.h>
71			#include <pwd.h>
72			#include <stdio.h>
73			#include <errno.h>
74			#include <stdlib.h>
75			#include <string.h>
76			#include <unistd.h>
77
78			#include <tls.h>
79
80			#include "cmds.h"
81			#include "ftp_var.h"
82
83			#ifndef SMALL
84			char * const ssl_verify_opts[] = {
85			#define SSL_CAFILE 0
86			"cafile",
87			#define SSL_CAPATH 1
88			"capath",
89			#define SSL_CIPHERS 2
90			"ciphers",
91			#define SSL_DONTVERIFY 3
92			"dont",
93			#define SSL_DOVERIFY 4
94			"do",
95			#define SSL_VERIFYDEPTH 5
96			"depth",
97			NULL
98			};
99
100			struct tls_config *tls_config;
101			#endif /* !SMALL */
102
103			int family = PF_UNSPEC;
104			int pipeout;
105
106			int
107			main(volatile int argc, char *argv[])
108			{
109			int ch, top, rval;
110			struct passwd *pw = NULL;
111			char *cp, homedir[PATH_MAX];
112			char *outfile = NULL;
113			const char *errstr;
114			int dumb_terminal = 0;
115			#ifndef SMALL
116			long long depth;
117			#endif
118
119			ftpport = "ftp";
120			httpport = "http";
121			#ifndef SMALL
122			httpsport = "https";
123			#endif /* !SMALL */
124			gateport = getenv("FTPSERVERPORT");
125			if (gateport == NULL \|\| *gateport == '\0')
126			gateport = "ftpgate";
127			doglob = 1;
128			interactive = 1;
129			autologin = 1;
130			passivemode = 1;
131			activefallback = 1;
132			preserve = 1;
133			verbose = 0;
134			progress = 0;
135			gatemode = 0;
136			#ifndef SMALL
137			editing = 0;
138			el = NULL;
139			hist = NULL;
140			cookiefile = NULL;
141			resume = 0;
142			srcaddr = NULL;
143			marg_sl = sl_init();
144			#endif /* !SMALL */
145			mark = HASHBYTES;
146			epsv4 = 1;
147			epsv4bad = 0;
148
149			/* Set default operation mode based on FTPMODE environment variable */
150			if ((cp = getenv("FTPMODE")) != NULL && *cp != '\0') {
151			if (strcmp(cp, "passive") == 0) {
152			passivemode = 1;
153			activefallback = 0;
154			} else if (strcmp(cp, "active") == 0) {
155			passivemode = 0;
156			activefallback = 0;
157			} else if (strcmp(cp, "gate") == 0) {
158			gatemode = 1;
159			} else if (strcmp(cp, "auto") == 0) {
160			passivemode = 1;
161			activefallback = 1;
162			} else
163			warnx("unknown FTPMODE: %s. Using defaults", cp);
164			}
165
166			if (strcmp(__progname, "gate-ftp") == 0)
167			gatemode = 1;
168			gateserver = getenv("FTPSERVER");
169			if (gateserver == NULL)
170			gateserver = "";
171			if (gatemode) {
172			if (*gateserver == '\0') {
173			warnx(
174			"Neither $FTPSERVER nor $GATE_SERVER is defined; disabling gate-ftp");
175			gatemode = 0;
176			}
177			}
178
179			cp = getenv("TERM");
180			dumb_terminal = (cp == NULL \|\| *cp == '\0' \|\| !strcmp(cp, "dumb") \|\|
181			!strcmp(cp, "emacs") \|\| !strcmp(cp, "su"));
182			fromatty = isatty(fileno(stdin));
183			if (fromatty) {
184			verbose = 1; /* verbose if from a tty */
185			#ifndef SMALL
186			if (!dumb_terminal)
187			editing = 1; /* editing mode on if tty is usable */
188			#endif /* !SMALL */
189			}
190
191			ttyout = stdout;
192			if (isatty(fileno(ttyout)) && !dumb_terminal && foregroundproc())
193			progress = 1; /* progress bar on if tty is usable */
194
195			#ifndef SMALL
196			cookiefile = getenv("http_cookies");
197			if (tls_init() != 0)
198			errx(1, "tls init failed");
199			if (tls_config == NULL) {
200			tls_config = tls_config_new();
201			if (tls_config == NULL)
202			errx(1, "tls config failed");
203			tls_config_set_protocols(tls_config, TLS_PROTOCOLS_ALL);
204			if (tls_config_set_ciphers(tls_config, "all") != 0)
205			errx(1, "tls set ciphers failed");
206			}
207			#endif /* !SMALL */
208
209			httpuseragent = NULL;
210
211			while ((ch = getopt(argc, argv,
212			"46AaCc:dD:Eegik:Mmno:pP:r:S:s:tU:vV")) != -1) {
213			switch (ch) {
214			case '4':
215			family = PF_INET;
216			break;
217			case '6':
218			family = PF_INET6;
219			break;
220			case 'A':
221			activefallback = 0;
222			passivemode = 0;
223			break;
224
225			case 'a':
226			anonftp = 1;
227			break;
228
229			case 'C':
230			#ifndef SMALL
231			resume = 1;
232			#endif /* !SMALL */
233			break;
234
235			case 'c':
236			#ifndef SMALL
237			cookiefile = optarg;
238			#endif /* !SMALL */
239			break;
240
241			case 'D':
242			action = optarg;
243			break;
244			case 'd':
245			#ifndef SMALL
246			options \|= SO_DEBUG;
247			debug++;
248			#endif /* !SMALL */
249			break;
250
251			case 'E':
252			epsv4 = 0;
253			break;
254
255			case 'e':
256			#ifndef SMALL
257			editing = 0;
258			#endif /* !SMALL */
259			break;
260
261			case 'g':
262			doglob = 0;
263			break;
264
265			case 'i':
266			interactive = 0;
267			break;
268
269			case 'k':
270			keep_alive_timeout = strtonum(optarg, 0, INT_MAX,
271			&errstr);
272			if (errstr != NULL) {
273			warnx("keep alive amount is %s: %s", errstr,
274			optarg);
275			usage();
276			}
277			break;
278			case 'M':
279			progress = 0;
280			break;
281			case 'm':
282			progress = -1;
283			break;
284
285			case 'n':
286			autologin = 0;
287			break;
288
289			case 'o':
290			outfile = optarg;
291			if (*outfile == '\0') {
292			pipeout = 0;
293			outfile = NULL;
294			ttyout = stdout;
295			} else {
296			pipeout = strcmp(outfile, "-") == 0;
297			ttyout = pipeout ? stderr : stdout;
298			}
299			break;
300
301			case 'p':
302			passivemode = 1;
303			activefallback = 0;
304			break;
305
306			case 'P':
307			ftpport = optarg;
308			break;
309
310			case 'r':
311			retry_connect = strtonum(optarg, 0, INT_MAX, &errstr);
312			if (errstr != NULL) {
313			warnx("retry amount is %s: %s", errstr,
314			optarg);
315			usage();
316			}
317			break;
318
319			case 'S':
320			#ifndef SMALL
321			cp = optarg;
322			while (*cp) {
323			char *str;
324			switch (getsubopt(&cp, ssl_verify_opts, &str)) {
325			case SSL_CAFILE:
326			if (str == NULL)
327			errx(1, "missing CA file");
328			if (tls_config_set_ca_file(
329			tls_config, str) != 0)
330			errx(1, "tls ca file failed");
331			break;
332			case SSL_CAPATH:
333			if (str == NULL)
334			errx(1, "missing CA directory"
335			" path");
336			if (tls_config_set_ca_path(
337			tls_config, str) != 0)
338			errx(1, "tls ca path failed");
339			break;
340			case SSL_CIPHERS:
341			if (str == NULL)
342			errx(1, "missing cipher list");
343			if (tls_config_set_ciphers(
344			tls_config, str) != 0)
345			errx(1, "tls ciphers failed");
346			break;
347			case SSL_DONTVERIFY:
348			tls_config_insecure_noverifycert(
349			tls_config);
350			tls_config_insecure_noverifyname(
351			tls_config);
352			break;
353			case SSL_DOVERIFY:
354			tls_config_verify(tls_config);
355			break;
356			case SSL_VERIFYDEPTH:
357			if (str == NULL)
358			errx(1, "missing depth");
359			depth = strtonum(str, 0, INT_MAX,
360			&errstr);
361			if (errstr)
362			errx(1, "certificate "
363			"validation depth is %s",
364			errstr);
365			tls_config_set_verify_depth(
366			tls_config, (int)depth);
367			break;
368			default:
369			errx(1, "unknown -S suboption `%s'",
370			suboptarg ? suboptarg : "");
371			/* NOTREACHED */
372			}
373			}
374			#endif
375			break;
376
377			case 's':
378			#ifndef SMALL
379			srcaddr = optarg;
380			#endif /* !SMALL */
381			break;
382
383			case 't':
384			trace = 1;
385			break;
386
387			#ifndef SMALL
388			case 'U':
389			free (httpuseragent);
390			if (strcspn(optarg, "\r\n") != strlen(optarg))
391			errx(1, "Invalid User-Agent: %s.", optarg);
392			if (asprintf(&httpuseragent, "User-Agent: %s",
393			optarg) == -1)
394			errx(1, "Can't allocate memory for HTTP(S) "
395			"User-Agent");
396			break;
397			#endif /* !SMALL */
398
399			case 'v':
400			verbose = 1;
401			break;
402
403			case 'V':
404			verbose = 0;
405			break;
406
407			default:
408			usage();
409			}
410			}
411			argc -= optind;
412			argv += optind;
413
414			#ifndef SMALL
415			cookie_load();
416			#endif /* !SMALL */
417			if (httpuseragent == NULL)
418			httpuseragent = HTTP_USER_AGENT;
419
420			cpend = 0; /* no pending replies */
421			proxy = 0; /* proxy not active */
422			crflag = 1; /* strip c.r. on ascii gets */
423			sendport = -1; /* not using ports */
424			/*
425			* Set up the home directory in case we're globbing.
426			*/
427			cp = getlogin();
428			if (cp != NULL) {
429			pw = getpwnam(cp);
430			}
431			if (pw == NULL)
432			pw = getpwuid(getuid());
433			if (pw != NULL) {
434			(void)strlcpy(homedir, pw->pw_dir, sizeof homedir);
435			home = homedir;
436			}
437
438			setttywidth(0);
439			(void)signal(SIGWINCH, setttywidth);
440
441			if (argc > 0) {
442			if (isurl(argv[0])) {
443			if (pipeout) {
444			#ifndef SMALL
445			if (pledge("stdio rpath dns tty inet proc exec fattr",
446			NULL) == -1)
447			err(1, "pledge");
448			#else
449			if (pledge("stdio rpath dns tty inet fattr",
450			NULL) == -1)
451			err(1, "pledge");
452			#endif
453			} else {
454			#ifndef SMALL
455			if (pledge("stdio rpath wpath cpath dns tty inet proc exec fattr",
456			NULL) == -1)
457			err(1, "pledge");
458			#else
459			if (pledge("stdio rpath wpath cpath dns tty inet fattr",
460			NULL) == -1)
461			err(1, "pledge");
462			#endif
463			}
464
465			rval = auto_fetch(argc, argv, outfile);
466			if (rval >= 0) /* -1 == connected and cd-ed */
467			exit(rval);
468			} else {
469			#ifndef SMALL
470			char *xargv[5];
471
472			if (setjmp(toplevel))
473			exit(0);
474			(void)signal(SIGINT, (sig_t)intr);
475			(void)signal(SIGPIPE, (sig_t)lostpeer);
476			xargv[0] = __progname;
477			xargv[1] = argv[0];
478			xargv[2] = argv[1];
479			xargv[3] = argv[2];
480			xargv[4] = NULL;
481			do {
482			setpeer(argc+1, xargv);
483			if (!retry_connect)
484			break;
485			if (!connected) {
486			macnum = 0;
487			fputs("Retrying...\n", ttyout);
488			sleep(retry_connect);
489			}
490			} while (!connected);
491			retry_connect = 0; /* connected, stop hiding msgs */
492			#endif /* !SMALL */
493			}
494			}
495			#ifndef SMALL
496			controlediting();
497			top = setjmp(toplevel) == 0;
498			if (top) {
499			(void)signal(SIGINT, (sig_t)intr);
500			(void)signal(SIGPIPE, (sig_t)lostpeer);
501			}
502			for (;;) {
503			cmdscanner(top);
504			top = 1;
505			}
506			#else /* !SMALL */
507			usage();
508			#endif /* !SMALL */
509			}
510
511			void
512			intr(void)
513			{
514			int save_errno = errno;
515
516			write(fileno(ttyout), "\n\r", 2);
517			alarmtimer(0);
518
519			errno = save_errno;
520			longjmp(toplevel, 1);
521			}
522
523			void
524			lostpeer(void)
525			{
526			int save_errno = errno;
527
528			alarmtimer(0);
529			if (connected) {
530			if (cout != NULL) {
531			(void)shutdown(fileno(cout), SHUT_RDWR);
532			(void)fclose(cout);
533			cout = NULL;
534			}
535			if (data >= 0) {
536			(void)shutdown(data, SHUT_RDWR);
537			(void)close(data);
538			data = -1;
539			}
540			connected = 0;
541			}
542			pswitch(1);
543			if (connected) {
544			if (cout != NULL) {
545			(void)shutdown(fileno(cout), SHUT_RDWR);
546			(void)fclose(cout);
547			cout = NULL;
548			}
549			connected = 0;
550			}
551			proxflag = 0;
552			pswitch(0);
553			errno = save_errno;
554			}
555
556			#ifndef SMALL
557			/*
558			* Generate a prompt
559			*/
560			char *
561			prompt(void)
562			{
563			return ("ftp> ");
564			}
565
566			/*
567			* Command parser.
568			*/
569			void
570			cmdscanner(int top)
571			{
572			struct cmd *c;
573			int num;
574			HistEvent hev;
575
576			if (!top && !editing)
577			(void)putc('\n', ttyout);
578			for (;;) {
579			if (!editing) {
580			if (fromatty) {
581			fputs(prompt(), ttyout);
582			(void)fflush(ttyout);
583			}
584			if (fgets(line, sizeof(line), stdin) == NULL)
585			quit(0, 0);
586			num = strlen(line);
587			if (num == 0)
588			break;
589			if (line[--num] == '\n') {
590			if (num == 0)
591			break;
592			line[num] = '\0';
593			} else if (num == sizeof(line) - 2) {
594			fputs("sorry, input line too long.\n", ttyout);
595			while ((num = getchar()) != '\n' && num != EOF)
596			/* void */;
597			break;
598			} /* else it was a line without a newline */
599			} else {
600			const char *buf;
601			cursor_pos = NULL;
602
603			if ((buf = el_gets(el, &num)) == NULL \|\| num == 0) {
604			putc('\n', ttyout);
605			fflush(ttyout);
606			quit(0, 0);
607			}
608			if (buf[--num] == '\n') {
609			if (num == 0)
610			break;
611			}
612			if (num >= sizeof(line)) {
613			fputs("sorry, input line too long.\n", ttyout);
614			break;
615			}
616			memcpy(line, buf, (size_t)num);
617			line[num] = '\0';
618			history(hist, &hev, H_ENTER, buf);
619			}
620
621			makeargv();
622			if (margc == 0)
623			continue;
624			c = getcmd(margv[0]);
625			if (c == (struct cmd *)-1) {
626			fputs("?Ambiguous command.\n", ttyout);
627			continue;
628			}
629			if (c == 0) {
630			/*
631			* Give editline(3) a shot at unknown commands.
632			* XXX - bogus commands with a colon in
633			* them will not elicit an error.
634			*/
635			if (editing &&
636			el_parse(el, margc, (const char **)margv) != 0)
637			fputs("?Invalid command.\n", ttyout);
638			continue;
639			}
640			if (c->c_conn && !connected) {
641			fputs("Not connected.\n", ttyout);
642			continue;
643			}
644			confirmrest = 0;
645			(*c->c_handler)(margc, margv);
646			if (bell && c->c_bell)
647			(void)putc('\007', ttyout);
648			if (c->c_handler != help)
649			break;
650			}
651			(void)signal(SIGINT, (sig_t)intr);
652			(void)signal(SIGPIPE, (sig_t)lostpeer);
653			}
654
655			struct cmd *
656			getcmd(const char *name)
657			{
658			const char p, q;
659			struct cmd c, found;
660			int nmatches, longest;
661
662			if (name == NULL)
663			return (0);
664
665			longest = 0;
666			nmatches = 0;
667			found = 0;
668			for (c = cmdtab; (p = c->c_name) != NULL; c++) {
669			for (q = name; q == p++; q++)
670			if (q == 0) / exact match? */
671			return (c);
672			if (!q) { / the name was a prefix */
673			if (q - name > longest) {
674			longest = q - name;
675			nmatches = 1;
676			found = c;
677			} else if (q - name == longest)
678			nmatches++;
679			}
680			}
681			if (nmatches > 1)
682			return ((struct cmd *)-1);
683			return (found);
684			}
685
686			/*
687			* Slice a string up into argc/argv.
688			*/
689
690			int slrflag;
691
692			void
693			makeargv(void)
694			{
695			char *argp;
696
697			stringbase = line; /* scan from first of buffer */
698			argbase = argbuf; /* store from first of buffer */
699			slrflag = 0;
700			marg_sl->sl_cur = 0; /* reset to start of marg_sl */
701			for (margc = 0; ; margc++) {
702			argp = slurpstring();
703			sl_add(marg_sl, argp);
704			if (argp == NULL)
705			break;
706			}
707			if (cursor_pos == line) {
708			cursor_argc = 0;
709			cursor_argo = 0;
710			} else if (cursor_pos != NULL) {
711			cursor_argc = margc;
712			cursor_argo = strlen(margv[margc-1]);
713			}
714			}
715
716			#define INC_CHKCURSOR(x) { (x)++ ; \
717			if (x == cursor_pos) { \
718			cursor_argc = margc; \
719			cursor_argo = ap-argbase; \
720			cursor_pos = NULL; \
721			} }
722
723			/*
724			* Parse string into argbuf;
725			* implemented with FSM to
726			* handle quoting and strings
727			*/
728			char *
729			slurpstring(void)
730			{
731			int got_one = 0;
732			char *sb = stringbase;
733			char *ap = argbase;
734			char tmp = argbase; / will return this if token found */
735
736			if (sb == '!' \|\| sb == '$') { /* recognize ! as a token for shell */
737			switch (slrflag) { /* and $ as token for macro invoke */
738			case 0:
739			slrflag++;
740			INC_CHKCURSOR(stringbase);
741			return ((*sb == '!') ? "!" : "$");
742			/* NOTREACHED */
743			case 1:
744			slrflag++;
745			altarg = stringbase;
746			break;
747			default:
748			break;
749			}
750			}
751
752			S0:
753			switch (*sb) {
754
755			case '\0':
756			goto OUT;
757
758			case ' ':
759			case '\t':
760			INC_CHKCURSOR(sb);
761			goto S0;
762
763			default:
764			switch (slrflag) {
765			case 0:
766			slrflag++;
767			break;
768			case 1:
769			slrflag++;
770			altarg = sb;
771			break;
772			default:
773			break;
774			}
775			goto S1;
776			}
777
778			S1:
779			switch (*sb) {
780
781			case ' ':
782			case '\t':
783			case '\0':
784			goto OUT; /* end of token */
785
786			case '\\':
787			INC_CHKCURSOR(sb);
788			goto S2; /* slurp next character */
789
790			case '"':
791			INC_CHKCURSOR(sb);
792			goto S3; /* slurp quoted string */
793
794			default:
795			ap = sb; /* add character to token */
796			ap++;
797			INC_CHKCURSOR(sb);
798			got_one = 1;
799			goto S1;
800			}
801
802			S2:
803			switch (*sb) {
804
805			case '\0':
806			goto OUT;
807
808			default:
809			ap = sb;
810			ap++;
811			INC_CHKCURSOR(sb);
812			got_one = 1;
813			goto S1;
814			}
815
816			S3:
817			switch (*sb) {
818
819			case '\0':
820			goto OUT;
821
822			case '"':
823			INC_CHKCURSOR(sb);
824			goto S1;
825
826			default:
827			ap = sb;
828			ap++;
829			INC_CHKCURSOR(sb);
830			got_one = 1;
831			goto S3;
832			}
833
834			OUT:
835			if (got_one)
836			*ap++ = '\0';
837			argbase = ap; /* update storage pointer */
838			stringbase = sb; /* update scan pointer */
839			if (got_one) {
840			return (tmp);
841			}
842			switch (slrflag) {
843			case 0:
844			slrflag++;
845			break;
846			case 1:
847			slrflag++;
848			altarg = (char *) 0;
849			break;
850			default:
851			break;
852			}
853			return (NULL);
854			}
855
856			/*
857			* Help command.
858			* Call each command handler with argc == 0 and argv[0] == name.
859			*/
860			void
861			help(int argc, char *argv[])
862			{
863			struct cmd *c;
864
865			if (argc == 1) {
866			StringList *buf;
867
868			buf = sl_init();
869			fprintf(ttyout, "%sommands may be abbreviated. Commands are:\n\n",
870			proxy ? "Proxy c" : "C");
871			for (c = cmdtab; c < &cmdtab[NCMDS]; c++)
872			if (c->c_name && (!proxy \|\| c->c_proxy))
873			sl_add(buf, c->c_name);
874			list_vertical(buf);
875			sl_free(buf, 0);
876			return;
877			}
878
879			#define HELPINDENT ((int) sizeof("disconnect"))
880
881			while (--argc > 0) {
882			char *arg;
883
884			arg = *++argv;
885			c = getcmd(arg);
886			if (c == (struct cmd *)-1)
887			fprintf(ttyout, "?Ambiguous help command %s\n", arg);
888			else if (c == NULL)
889			fprintf(ttyout, "?Invalid help command %s\n", arg);
890			else
891			fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
892			c->c_name, c->c_help);
893			}
894			}
895			#endif /* !SMALL */
896
897			void
898			usage(void)
899			{
900			fprintf(stderr, "usage: "
901			#ifndef SMALL
902			"%1$s [-46AadEegiMmnptVv] [-D title] [-k seconds] [-P port] "
903			"[-r seconds]\n"
904			" [-s srcaddr] [host [port]]\n"
905			" %1$s [-C] [-o output] [-s srcaddr]\n"
906			" ftp://[user:password@]host[:port]/file[/] ...\n"
907			" %1$s [-C] [-c cookie] [-o output] [-S ssl_options] "
908			"[-s srcaddr]\n"
909			" [-U useragent] "
910			"http[s]://[user:password@]host[:port]/file ...\n"
911			" %1$s [-C] [-o output] [-s srcaddr] file:file ...\n"
912			" %1$s [-C] [-o output] [-s srcaddr] host:/file[/] ...\n",
913			#else /* !SMALL */
914			"%1$s [-o output] ftp://[user:password@]host[:port]/file[/] ...\n"
915			" %1$s [-o output] http://host[:port]/file ...\n"
916			" %1$s [-o output] file:file ...\n"
917			" %1$s [-o output] host:/file[/] ...\n",
918			#endif /* !SMALL */
919			__progname);
920			exit(1);
921			}