1/*	$NetBSD: main.c,v 1.17 2009/11/15 10:12:37 lukem Exp $	*/
2/*	from	NetBSD: main.c,v 1.117 2009/07/13 19:05:41 roy Exp	*/
3
4/*-
5 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Luke Mewburn.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF 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 * Copyright (C) 1997 and 1998 WIDE Project.
64 * All rights reserved.
65 *
66 * Redistribution and use in source and binary forms, with or without
67 * modification, are permitted provided that the following conditions
68 * are met:
69 * 1. Redistributions of source code must retain the above copyright
70 *    notice, this list of conditions and the following disclaimer.
71 * 2. Redistributions in binary form must reproduce the above copyright
72 *    notice, this list of conditions and the following disclaimer in the
73 *    documentation and/or other materials provided with the distribution.
74 * 3. Neither the name of the project nor the names of its contributors
75 *    may be used to endorse or promote products derived from this software
76 *    without specific prior written permission.
77 *
78 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
79 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
80 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
81 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
82 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
83 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
84 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
88 * SUCH DAMAGE.
89 */
90
91#include "tnftp.h"
92
93#if 0	/* tnftp */
94
95#include <sys/cdefs.h>
96#ifndef lint
97__COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\
98 The Regents of the University of California.  All rights reserved.\
99  Copyright 1996-2008 The NetBSD Foundation, Inc.  All rights reserved");
100#endif /* not lint */
101
102#ifndef lint
103#if 0
104static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 10/9/94";
105#else
106__RCSID(" NetBSD: main.c,v 1.117 2009/07/13 19:05:41 roy Exp  ");
107#endif
108#endif /* not lint */
109
110/*
111 * FTP User Program -- Command Interface.
112 */
113#include <sys/types.h>
114#include <sys/socket.h>
115
116#include <err.h>
117#include <errno.h>
118#include <netdb.h>
119#include <paths.h>
120#include <pwd.h>
121#include <signal.h>
122#include <stdio.h>
123#include <stdlib.h>
124#include <string.h>
125#include <time.h>
126#include <unistd.h>
127#include <locale.h>
128
129#endif	/* tnftp */
130
131#define	GLOBAL		/* force GLOBAL decls in ftp_var.h to be declared */
132#include "ftp_var.h"
133
134#define	FTP_PROXY	"ftp_proxy"	/* env var with FTP proxy location */
135#define	HTTP_PROXY	"http_proxy"	/* env var with HTTP proxy location */
136#define	NO_PROXY	"no_proxy"	/* env var with list of non-proxied
137					 * hosts, comma or space separated */
138
139static void	setupoption(const char *, const char *, const char *);
140int		main(int, char *[]);
141
142int
143main(int volatile argc, char **volatile argv)
144{
145	int ch, rval;
146	struct passwd *pw;
147	char *cp, *ep, *anonpass, *upload_path, *src_addr;
148	const char *anonuser;
149	int dumbterm, isupload;
150	size_t len;
151
152	tzset();
153#if 0	/* tnftp */	/* XXX */
154	setlocale(LC_ALL, "");
155#endif	/* tnftp */
156	setprogname(argv[0]);
157
158	sigint_raised = 0;
159
160	ftpport = "ftp";
161	httpport = "http";
162	gateport = NULL;
163	cp = getenv("FTPSERVERPORT");
164	if (cp != NULL)
165		gateport = cp;
166	else
167		gateport = "ftpgate";
168	doglob = 1;
169	interactive = 1;
170	autologin = 1;
171	passivemode = 1;
172	activefallback = 1;
173	preserve = 1;
174	verbose = 0;
175	progress = 0;
176	gatemode = 0;
177	data = -1;
178	outfile = NULL;
179	restartautofetch = 0;
180#ifndef NO_EDITCOMPLETE
181	editing = 0;
182	el = NULL;
183	hist = NULL;
184#endif
185	bytes = 0;
186	mark = HASHBYTES;
187	rate_get = 0;
188	rate_get_incr = DEFAULTINCR;
189	rate_put = 0;
190	rate_put_incr = DEFAULTINCR;
191#ifdef INET6
192	epsv4 = 1;
193	epsv6 = 1;
194#else
195	epsv4 = 0;
196	epsv6 = 0;
197#endif
198	epsv4bad = 0;
199	epsv6bad = 0;
200	src_addr = NULL;
201	upload_path = NULL;
202	isupload = 0;
203	reply_callback = NULL;
204#ifdef INET6
205	family = AF_UNSPEC;
206#else
207	family = AF_INET;	/* force AF_INET if no INET6 support */
208#endif
209
210	netrc[0] = '\0';
211	cp = getenv("NETRC");
212	if (cp != NULL && strlcpy(netrc, cp, sizeof(netrc)) >= sizeof(netrc))
213		errx(1, "$NETRC `%s': %s", cp, strerror(ENAMETOOLONG));
214
215	marg_sl = ftp_sl_init();
216	if ((tmpdir = getenv("TMPDIR")) == NULL)
217		tmpdir = _PATH_TMP;
218
219	/* Set default operation mode based on FTPMODE environment variable */
220	if ((cp = getenv("FTPMODE")) != NULL) {
221		if (strcasecmp(cp, "passive") == 0) {
222			passivemode = 1;
223			activefallback = 0;
224		} else if (strcasecmp(cp, "active") == 0) {
225			passivemode = 0;
226			activefallback = 0;
227		} else if (strcasecmp(cp, "gate") == 0) {
228			gatemode = 1;
229		} else if (strcasecmp(cp, "auto") == 0) {
230			passivemode = 1;
231			activefallback = 1;
232		} else
233			warnx("Unknown $FTPMODE `%s'; using defaults", cp);
234	}
235
236	if (strcmp(getprogname(), "pftp") == 0) {
237		passivemode = 1;
238		activefallback = 0;
239	} else if (strcmp(getprogname(), "gate-ftp") == 0)
240		gatemode = 1;
241
242	gateserver = getenv("FTPSERVER");
243	if (gateserver == NULL || *gateserver == '\0')
244		gateserver = GATE_SERVER;
245	if (gatemode) {
246		if (*gateserver == '\0') {
247			warnx(
248"Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp");
249			gatemode = 0;
250		}
251	}
252
253	cp = getenv("TERM");
254	if (cp == NULL || strcmp(cp, "dumb") == 0)
255		dumbterm = 1;
256	else
257		dumbterm = 0;
258	fromatty = isatty(fileno(stdin));
259	ttyout = stdout;
260	if (isatty(fileno(ttyout))) {
261		verbose = 1;		/* verbose if to a tty */
262		if (! dumbterm) {
263#ifndef NO_EDITCOMPLETE
264			if (fromatty)	/* editing mode on if tty is usable */
265				editing = 1;
266#endif
267#ifndef NO_PROGRESS
268			if (foregroundproc())
269				progress = 1;	/* progress bar on if fg */
270#endif
271		}
272	}
273
274	while ((ch = getopt(argc, argv, "46AadefginN:o:pP:q:r:Rs:tT:u:vV")) != -1) {
275		switch (ch) {
276		case '4':
277			family = AF_INET;
278			break;
279
280		case '6':
281#ifdef INET6
282			family = AF_INET6;
283#else
284			warnx("INET6 support is not available; ignoring -6");
285#endif
286			break;
287
288		case 'A':
289			activefallback = 0;
290			passivemode = 0;
291			break;
292
293		case 'a':
294			anonftp = 1;
295			break;
296
297		case 'd':
298			options |= SO_DEBUG;
299			ftp_debug++;
300			break;
301
302		case 'e':
303#ifndef NO_EDITCOMPLETE
304			editing = 0;
305#endif
306			break;
307
308		case 'f':
309			flushcache = 1;
310			break;
311
312		case 'g':
313			doglob = 0;
314			break;
315
316		case 'i':
317			interactive = 0;
318			break;
319
320		case 'n':
321			autologin = 0;
322			break;
323
324		case 'N':
325			if (strlcpy(netrc, optarg, sizeof(netrc))
326			    >= sizeof(netrc))
327				errx(1, "%s: %s", optarg,
328				    strerror(ENAMETOOLONG));
329			break;
330
331		case 'o':
332			outfile = optarg;
333			if (strcmp(outfile, "-") == 0)
334				ttyout = stderr;
335			break;
336
337		case 'p':
338			passivemode = 1;
339			activefallback = 0;
340			break;
341
342		case 'P':
343			ftpport = optarg;
344			break;
345
346		case 'q':
347			quit_time = strtol(optarg, &ep, 10);
348			if (quit_time < 1 || *ep != '\0')
349				errx(1, "Bad quit value: %s", optarg);
350			break;
351
352		case 'r':
353			retry_connect = strtol(optarg, &ep, 10);
354			if (retry_connect < 1 || *ep != '\0')
355				errx(1, "Bad retry value: %s", optarg);
356			break;
357
358		case 'R':
359			restartautofetch = 1;
360			break;
361
362		case 's':
363			src_addr = optarg;
364			break;
365
366		case 't':
367			trace = 1;
368			break;
369
370		case 'T':
371		{
372			int targc;
373			char *targv[6], *oac;
374			char cmdbuf[MAX_C_NAME];
375
376				/* look for `dir,max[,incr]' */
377			targc = 0;
378			(void)strlcpy(cmdbuf, "-T", sizeof(cmdbuf));
379			targv[targc++] = cmdbuf;
380			oac = ftp_strdup(optarg);
381
382			while ((cp = strsep(&oac, ",")) != NULL) {
383				if (*cp == '\0') {
384					warnx("Bad throttle value `%s'",
385					    optarg);
386					usage();
387					/* NOTREACHED */
388				}
389				targv[targc++] = cp;
390				if (targc >= 5)
391					break;
392			}
393			if (parserate(targc, targv, 1) == -1)
394				usage();
395			free(oac);
396			break;
397		}
398
399		case 'u':
400		{
401			isupload = 1;
402			interactive = 0;
403			upload_path = ftp_strdup(optarg);
404
405			break;
406		}
407
408		case 'v':
409			progress = verbose = 1;
410			break;
411
412		case 'V':
413			progress = verbose = 0;
414			break;
415
416		default:
417			usage();
418		}
419	}
420			/* set line buffering on ttyout */
421	setvbuf(ttyout, NULL, _IOLBF, 0);
422	argc -= optind;
423	argv += optind;
424
425	cpend = 0;	/* no pending replies */
426	proxy = 0;	/* proxy not active */
427	crflag = 1;	/* strip c.r. on ascii gets */
428	sendport = -1;	/* not using ports */
429
430	if (src_addr != NULL) {
431		struct addrinfo hints;
432		int error;
433
434		memset(&hints, 0, sizeof(hints));
435		hints.ai_family = family;
436		hints.ai_socktype = SOCK_STREAM;
437		hints.ai_flags = AI_PASSIVE;
438		error = getaddrinfo(src_addr, NULL, &hints, &bindai);
439		if (error) {
440		    	errx(1, "Can't lookup `%s': %s", src_addr,
441			    (error == EAI_SYSTEM) ? strerror(errno)
442						  : gai_strerror(error));
443		}
444	}
445
446	/*
447	 * Cache the user name and home directory.
448	 */
449	localhome = NULL;
450	localname = NULL;
451	anonuser = "anonymous";
452	cp = getenv("HOME");
453	if (! EMPTYSTRING(cp))
454		localhome = ftp_strdup(cp);
455	pw = NULL;
456	cp = getlogin();
457	if (cp != NULL)
458		pw = getpwnam(cp);
459	if (pw == NULL)
460		pw = getpwuid(getuid());
461	if (pw != NULL) {
462		if (localhome == NULL && !EMPTYSTRING(pw->pw_dir))
463			localhome = ftp_strdup(pw->pw_dir);
464		localname = ftp_strdup(pw->pw_name);
465		anonuser = localname;
466	}
467	if (netrc[0] == '\0' && localhome != NULL) {
468		if (strlcpy(netrc, localhome, sizeof(netrc)) >= sizeof(netrc) ||
469		    strlcat(netrc, "/.netrc", sizeof(netrc)) >= sizeof(netrc)) {
470			warnx("%s/.netrc: %s", localhome,
471			    strerror(ENAMETOOLONG));
472			netrc[0] = '\0';
473		}
474	}
475	if (localhome == NULL)
476		localhome = ftp_strdup("/");
477
478	/*
479	 * Every anonymous FTP server I've encountered will accept the
480	 * string "username@", and will append the hostname itself. We
481	 * do this by default since many servers are picky about not
482	 * having a FQDN in the anonymous password.
483	 * - thorpej@NetBSD.org
484	 */
485	len = strlen(anonuser) + 2;
486	anonpass = ftp_malloc(len);
487	(void)strlcpy(anonpass, anonuser, len);
488	(void)strlcat(anonpass, "@",	  len);
489
490			/*
491			 * set all the defaults for options defined in
492			 * struct option optiontab[]  declared in cmdtab.c
493			 */
494	setupoption("anonpass",		getenv("FTPANONPASS"),	anonpass);
495	setupoption("ftp_proxy",	getenv(FTP_PROXY),	"");
496	setupoption("http_proxy",	getenv(HTTP_PROXY),	"");
497	setupoption("no_proxy",		getenv(NO_PROXY),	"");
498	setupoption("pager",		getenv("PAGER"),	DEFAULTPAGER);
499	setupoption("prompt",		getenv("FTPPROMPT"),	DEFAULTPROMPT);
500	setupoption("rprompt",		getenv("FTPRPROMPT"),	DEFAULTRPROMPT);
501
502	free(anonpass);
503
504	setttywidth(0);
505#ifdef SIGINFO
506	(void)xsignal(SIGINFO, psummary);
507#endif
508	(void)xsignal(SIGQUIT, psummary);
509	(void)xsignal(SIGUSR1, crankrate);
510	(void)xsignal(SIGUSR2, crankrate);
511	(void)xsignal(SIGWINCH, setttywidth);
512
513	if (argc > 0) {
514		if (isupload) {
515			rval = auto_put(argc, argv, upload_path);
516 sigint_or_rval_exit:
517			if (sigint_raised) {
518				(void)xsignal(SIGINT, SIG_DFL);
519				raise(SIGINT);
520			}
521			exit(rval);
522		} else if (strchr(argv[0], ':') != NULL
523			    && ! isipv6addr(argv[0])) {
524			rval = auto_fetch(argc, argv);
525			if (rval >= 0)		/* -1 == connected and cd-ed */
526				goto sigint_or_rval_exit;
527		} else {
528			char *xargv[4], *uuser, *host;
529			char cmdbuf[MAXPATHLEN];
530
531			if ((rval = sigsetjmp(toplevel, 1)))
532				goto sigint_or_rval_exit;
533			(void)xsignal(SIGINT, intr);
534			(void)xsignal(SIGPIPE, lostpeer);
535			uuser = NULL;
536			host = argv[0];
537			cp = strchr(host, '@');
538			if (cp) {
539				*cp = '\0';
540				uuser = host;
541				host = cp + 1;
542			}
543			(void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf));
544			xargv[0] = cmdbuf;
545			xargv[1] = host;
546			xargv[2] = argv[1];
547			xargv[3] = NULL;
548			do {
549				int oautologin;
550
551				oautologin = autologin;
552				if (uuser != NULL) {
553					anonftp = 0;
554					autologin = 0;
555				}
556				setpeer(argc+1, xargv);
557				autologin = oautologin;
558				if (connected == 1 && uuser != NULL)
559					(void)ftp_login(host, uuser, NULL);
560				if (!retry_connect)
561					break;
562				if (!connected) {
563					macnum = 0;
564					fprintf(ttyout,
565					    "Retrying in %d seconds...\n",
566					    retry_connect);
567					sleep(retry_connect);
568				}
569			} while (!connected);
570			retry_connect = 0; /* connected, stop hiding msgs */
571		}
572	}
573	if (isupload)
574		usage();
575
576#ifndef NO_EDITCOMPLETE
577	controlediting();
578#endif /* !NO_EDITCOMPLETE */
579
580	(void)sigsetjmp(toplevel, 1);
581	(void)xsignal(SIGINT, intr);
582	(void)xsignal(SIGPIPE, lostpeer);
583	for (;;)
584		cmdscanner();
585}
586
587/*
588 * Generate a prompt
589 */
590char *
591prompt(void)
592{
593	static char	**promptopt;
594	static char	  buf[MAXPATHLEN];
595
596	if (promptopt == NULL) {
597		struct option *o;
598
599		o = getoption("prompt");
600		if (o == NULL)
601			errx(1, "prompt: no such option `prompt'");
602		promptopt = &(o->value);
603	}
604	formatbuf(buf, sizeof(buf), *promptopt ? *promptopt : DEFAULTPROMPT);
605	return (buf);
606}
607
608/*
609 * Generate an rprompt
610 */
611char *
612rprompt(void)
613{
614	static char	**rpromptopt;
615	static char	  buf[MAXPATHLEN];
616
617	if (rpromptopt == NULL) {
618		struct option *o;
619
620		o = getoption("rprompt");
621		if (o == NULL)
622			errx(1, "rprompt: no such option `rprompt'");
623		rpromptopt = &(o->value);
624	}
625	formatbuf(buf, sizeof(buf), *rpromptopt ? *rpromptopt : DEFAULTRPROMPT);
626	return (buf);
627}
628
629/*
630 * Command parser.
631 */
632void
633cmdscanner(void)
634{
635	struct cmd	*c;
636	char		*p;
637#ifndef NO_EDITCOMPLETE
638	int		 ch;
639	size_t		 num;
640#endif
641	int		 len;
642	char		 cmdbuf[MAX_C_NAME];
643
644	for (;;) {
645#ifndef NO_EDITCOMPLETE
646		if (!editing) {
647#endif /* !NO_EDITCOMPLETE */
648			if (fromatty) {
649				fputs(prompt(), ttyout);
650				p = rprompt();
651				if (*p)
652					fprintf(ttyout, "%s ", p);
653			}
654			(void)fflush(ttyout);
655			len = get_line(stdin, line, sizeof(line), NULL);
656			switch (len) {
657			case -1:	/* EOF */
658			case -2:	/* error */
659				if (fromatty)
660					putc('\n', ttyout);
661				quit(0, NULL);
662				/* NOTREACHED */
663			case -3:	/* too long; try again */
664				fputs("Sorry, input line is too long.\n",
665				    ttyout);
666				continue;
667			case 0:		/* empty; try again */
668				continue;
669			default:	/* all ok */
670				break;
671			}
672#ifndef NO_EDITCOMPLETE
673		} else {
674			const char *buf;
675			HistEvent ev;
676			cursor_pos = NULL;
677
678			buf = el_gets(el, &ch);
679			num = ch;
680			if (buf == NULL || num == 0) {
681				if (fromatty)
682					putc('\n', ttyout);
683				quit(0, NULL);
684			}
685			if (num >= sizeof(line)) {
686				fputs("Sorry, input line is too long.\n",
687				    ttyout);
688				break;
689			}
690			memcpy(line, buf, num);
691			if (line[--num] == '\n') {
692				line[num] = '\0';
693				if (num == 0)
694					break;
695			}
696			history(hist, &ev, H_ENTER, buf);
697		}
698#endif /* !NO_EDITCOMPLETE */
699
700		makeargv();
701		if (margc == 0)
702			continue;
703		c = getcmd(margv[0]);
704		if (c == (struct cmd *)-1) {
705			fputs("?Ambiguous command.\n", ttyout);
706			continue;
707		}
708		if (c == NULL) {
709#if !defined(NO_EDITCOMPLETE)
710			/*
711			 * attempt to el_parse() unknown commands.
712			 * any command containing a ':' would be parsed
713			 * as "[prog:]cmd ...", and will result in a
714			 * false positive if prog != "ftp", so treat
715			 * such commands as invalid.
716			 */
717			if (strchr(margv[0], ':') != NULL ||
718			    !editing ||
719			    el_parse(el, margc, (const char **)margv) != 0)
720#endif /* !NO_EDITCOMPLETE */
721				fputs("?Invalid command.\n", ttyout);
722			continue;
723		}
724		if (c->c_conn && !connected) {
725			fputs("Not connected.\n", ttyout);
726			continue;
727		}
728		confirmrest = 0;
729		(void)strlcpy(cmdbuf, c->c_name, sizeof(cmdbuf));
730		margv[0] = cmdbuf;
731		(*c->c_handler)(margc, margv);
732		if (bell && c->c_bell)
733			(void)putc('\007', ttyout);
734		if (c->c_handler != help)
735			break;
736	}
737	(void)xsignal(SIGINT, intr);
738	(void)xsignal(SIGPIPE, lostpeer);
739}
740
741struct cmd *
742getcmd(const char *name)
743{
744	const char *p, *q;
745	struct cmd *c, *found;
746	int nmatches, longest;
747
748	if (name == NULL)
749		return (0);
750
751	longest = 0;
752	nmatches = 0;
753	found = 0;
754	for (c = cmdtab; (p = c->c_name) != NULL; c++) {
755		for (q = name; *q == *p++; q++)
756			if (*q == 0)		/* exact match? */
757				return (c);
758		if (!*q) {			/* the name was a prefix */
759			if (q - name > longest) {
760				longest = q - name;
761				nmatches = 1;
762				found = c;
763			} else if (q - name == longest)
764				nmatches++;
765		}
766	}
767	if (nmatches > 1)
768		return ((struct cmd *)-1);
769	return (found);
770}
771
772/*
773 * Slice a string up into argc/argv.
774 */
775
776int slrflag;
777
778void
779makeargv(void)
780{
781	char *argp;
782
783	stringbase = line;		/* scan from first of buffer */
784	argbase = argbuf;		/* store from first of buffer */
785	slrflag = 0;
786	marg_sl->sl_cur = 0;		/* reset to start of marg_sl */
787	for (margc = 0; ; margc++) {
788		argp = slurpstring();
789		ftp_sl_add(marg_sl, argp);
790		if (argp == NULL)
791			break;
792	}
793#ifndef NO_EDITCOMPLETE
794	if (cursor_pos == line) {
795		cursor_argc = 0;
796		cursor_argo = 0;
797	} else if (cursor_pos != NULL) {
798		cursor_argc = margc;
799		cursor_argo = strlen(margv[margc-1]);
800	}
801#endif /* !NO_EDITCOMPLETE */
802}
803
804#ifdef NO_EDITCOMPLETE
805#define	INC_CHKCURSOR(x)	(x)++
806#else  /* !NO_EDITCOMPLETE */
807#define	INC_CHKCURSOR(x)	{ (x)++ ; \
808				if (x == cursor_pos) { \
809					cursor_argc = margc; \
810					cursor_argo = ap-argbase; \
811					cursor_pos = NULL; \
812				} }
813
814#endif /* !NO_EDITCOMPLETE */
815
816/*
817 * Parse string into argbuf;
818 * implemented with FSM to
819 * handle quoting and strings
820 */
821char *
822slurpstring(void)
823{
824	static char bangstr[2] = { '!', '\0' };
825	static char dollarstr[2] = { '$', '\0' };
826	int got_one = 0;
827	char *sb = stringbase;
828	char *ap = argbase;
829	char *tmp = argbase;		/* will return this if token found */
830
831	if (*sb == '!' || *sb == '$') {	/* recognize ! as a token for shell */
832		switch (slrflag) {	/* and $ as token for macro invoke */
833			case 0:
834				slrflag++;
835				INC_CHKCURSOR(stringbase);
836				return ((*sb == '!') ? bangstr : dollarstr);
837				/* NOTREACHED */
838			case 1:
839				slrflag++;
840				altarg = stringbase;
841				break;
842			default:
843				break;
844		}
845	}
846
847S0:
848	switch (*sb) {
849
850	case '\0':
851		goto OUT;
852
853	case ' ':
854	case '\t':
855		INC_CHKCURSOR(sb);
856		goto S0;
857
858	default:
859		switch (slrflag) {
860			case 0:
861				slrflag++;
862				break;
863			case 1:
864				slrflag++;
865				altarg = sb;
866				break;
867			default:
868				break;
869		}
870		goto S1;
871	}
872
873S1:
874	switch (*sb) {
875
876	case ' ':
877	case '\t':
878	case '\0':
879		goto OUT;	/* end of token */
880
881	case '\\':
882		INC_CHKCURSOR(sb);
883		goto S2;	/* slurp next character */
884
885	case '"':
886		INC_CHKCURSOR(sb);
887		goto S3;	/* slurp quoted string */
888
889	default:
890		*ap = *sb;	/* add character to token */
891		ap++;
892		INC_CHKCURSOR(sb);
893		got_one = 1;
894		goto S1;
895	}
896
897S2:
898	switch (*sb) {
899
900	case '\0':
901		goto OUT;
902
903	default:
904		*ap = *sb;
905		ap++;
906		INC_CHKCURSOR(sb);
907		got_one = 1;
908		goto S1;
909	}
910
911S3:
912	switch (*sb) {
913
914	case '\0':
915		goto OUT;
916
917	case '"':
918		INC_CHKCURSOR(sb);
919		goto S1;
920
921	default:
922		*ap = *sb;
923		ap++;
924		INC_CHKCURSOR(sb);
925		got_one = 1;
926		goto S3;
927	}
928
929OUT:
930	if (got_one)
931		*ap++ = '\0';
932	argbase = ap;			/* update storage pointer */
933	stringbase = sb;		/* update scan pointer */
934	if (got_one) {
935		return (tmp);
936	}
937	switch (slrflag) {
938		case 0:
939			slrflag++;
940			break;
941		case 1:
942			slrflag++;
943			altarg = NULL;
944			break;
945		default:
946			break;
947	}
948	return (NULL);
949}
950
951/*
952 * Help/usage command.
953 * Call each command handler with argc == 0 and argv[0] == name.
954 */
955void
956help(int argc, char *argv[])
957{
958	struct cmd *c;
959	char *nargv[1], *cmd;
960	const char *p;
961	int isusage;
962
963	cmd = argv[0];
964	isusage = (strcmp(cmd, "usage") == 0);
965	if (argc == 0 || (isusage && argc == 1)) {
966		UPRINTF("usage: %s [command [...]]\n", cmd);
967		return;
968	}
969	if (argc == 1) {
970		StringList *buf;
971
972		buf = ftp_sl_init();
973		fprintf(ttyout,
974		    "%sommands may be abbreviated.  Commands are:\n\n",
975		    proxy ? "Proxy c" : "C");
976		for (c = cmdtab; (p = c->c_name) != NULL; c++)
977			if (!proxy || c->c_proxy)
978				ftp_sl_add(buf, ftp_strdup(p));
979		list_vertical(buf);
980		sl_free(buf, 1);
981		return;
982	}
983
984#define	HELPINDENT ((int) sizeof("disconnect"))
985
986	while (--argc > 0) {
987		char *arg;
988		char cmdbuf[MAX_C_NAME];
989
990		arg = *++argv;
991		c = getcmd(arg);
992		if (c == (struct cmd *)-1)
993			fprintf(ttyout, "?Ambiguous %s command `%s'\n",
994			    cmd, arg);
995		else if (c == NULL)
996			fprintf(ttyout, "?Invalid %s command `%s'\n",
997			    cmd, arg);
998		else {
999			if (isusage) {
1000				(void)strlcpy(cmdbuf, c->c_name, sizeof(cmdbuf));
1001				nargv[0] = cmdbuf;
1002				(*c->c_handler)(0, nargv);
1003			} else
1004				fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
1005				    c->c_name, c->c_help);
1006		}
1007	}
1008}
1009
1010struct option *
1011getoption(const char *name)
1012{
1013	const char *p;
1014	struct option *c;
1015
1016	if (name == NULL)
1017		return (NULL);
1018	for (c = optiontab; (p = c->name) != NULL; c++) {
1019		if (strcasecmp(p, name) == 0)
1020			return (c);
1021	}
1022	return (NULL);
1023}
1024
1025char *
1026getoptionvalue(const char *name)
1027{
1028	struct option *c;
1029
1030	if (name == NULL)
1031		errx(1, "getoptionvalue: invoked with NULL name");
1032	c = getoption(name);
1033	if (c != NULL)
1034		return (c->value);
1035	errx(1, "getoptionvalue: invoked with unknown option `%s'", name);
1036	/* NOTREACHED */
1037}
1038
1039static void
1040setupoption(const char *name, const char *value, const char *defaultvalue)
1041{
1042	set_option(name, value ? value : defaultvalue, 0);
1043}
1044
1045void
1046usage(void)
1047{
1048	const char *progname = getprogname();
1049
1050	(void)fprintf(stderr,
1051"usage: %s [-46AadefginpRtVv] [-N netrc] [-o outfile] [-P port] [-q quittime]\n"
1052"           [-r retry] [-s srcaddr] [-T dir,max[,inc]]\n"
1053"           [[user@]host [port]] [host:path[/]] [file:///file]\n"
1054"           [ftp://[user[:pass]@]host[:port]/path[/]]\n"
1055"           [http://[user[:pass]@]host[:port]/path] [...]\n"
1056"       %s -u URL file [...]\n", progname, progname);
1057	exit(1);
1058}
1059