vendor/NetBSD/lukemftp

1 files changed, 1051 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000000000..5d60cdbcd7706
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,1051 @@
+/*	$NetBSD: main.c,v 1.94 2005/05/13 05:03:49 lukem Exp $	*/
+
+/*-
+ * Copyright (c) 1996-2004 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Luke Mewburn.
+ *
+ * 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 NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+/*
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 10/9/94";
+#else
+__RCSID("$NetBSD: main.c,v 1.94 2005/05/13 05:03:49 lukem Exp $");
+#endif
+#endif /* not lint */
+
+/*
+ * FTP User Program -- Command Interface.
+ */
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <err.h>
+#include <errno.h>
+#include <netdb.h>
+#include <paths.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <locale.h>
+
+#define	GLOBAL		/* force GLOBAL decls in ftp_var.h to be declared */
+#include "ftp_var.h"
+
+#define	FTP_PROXY	"ftp_proxy"	/* env var with FTP proxy location */
+#define	HTTP_PROXY	"http_proxy"	/* env var with HTTP proxy location */
+#define	NO_PROXY	"no_proxy"	/* env var with list of non-proxied
+					 * hosts, comma or space separated */
+
+static void	setupoption(char *, char *, char *);
+int		main(int, char *[]);
+
+int
+main(int argc, char *argv[])
+{
+	int ch, rval;
+	struct passwd *pw;
+	char *cp, *ep, *anonuser, *anonpass, *upload_path;
+	int dumbterm, s, len, isupload;
+	socklen_t slen;
+
+	setlocale(LC_ALL, "");
+	setprogname(argv[0]);
+
+	sigint_raised = 0;
+
+	ftpport = "ftp";
+	httpport = "http";
+	gateport = NULL;
+	cp = getenv("FTPSERVERPORT");
+	if (cp != NULL)
+		gateport = cp;
+	else
+		gateport = "ftpgate";
+	doglob = 1;
+	interactive = 1;
+	autologin = 1;
+	passivemode = 1;
+	activefallback = 1;
+	preserve = 1;
+	verbose = 0;
+	progress = 0;
+	gatemode = 0;
+	data = -1;
+	outfile = NULL;
+	restartautofetch = 0;
+#ifndef NO_EDITCOMPLETE
+	editing = 0;
+	el = NULL;
+	hist = NULL;
+#endif
+	bytes = 0;
+	mark = HASHBYTES;
+	rate_get = 0;
+	rate_get_incr = DEFAULTINCR;
+	rate_put = 0;
+	rate_put_incr = DEFAULTINCR;
+#ifdef INET6
+	epsv4 = 1;
+#else
+	epsv4 = 0;
+#endif
+	epsv4bad = 0;
+	upload_path = NULL;
+	isupload = 0;
+	reply_callback = NULL;
+	family = AF_UNSPEC;
+
+	netrc[0] = '\0';
+	cp = getenv("NETRC");
+	if (cp != NULL && strlcpy(netrc, cp, sizeof(netrc)) >= sizeof(netrc))
+		errx(1, "$NETRC `%s': %s", cp, strerror(ENAMETOOLONG));
+
+	/*
+	 * Get the default socket buffer sizes if we don't already have them.
+	 * It doesn't matter which socket we do this to, because on the first
+	 * call no socket buffer sizes will have been modified, so we are
+	 * guaranteed to get the system defaults.
+	 */
+	s = socket(AF_INET, SOCK_STREAM, 0);
+	if (s == -1)
+		err(1, "can't create socket");
+	slen = sizeof(rcvbuf_size);
+	if (getsockopt(s, SOL_SOCKET, SO_RCVBUF,
+	    (void *)&rcvbuf_size, &slen) == -1)
+		err(1, "unable to get default rcvbuf size");
+	slen = sizeof(sndbuf_size);
+	if (getsockopt(s, SOL_SOCKET, SO_SNDBUF,
+	    (void *)&sndbuf_size, &slen) == -1)
+		err(1, "unable to get default sndbuf size");
+	(void)close(s);
+					/* sanity check returned buffer sizes */
+	if (rcvbuf_size <= 0)
+		rcvbuf_size = 8 * 1024;
+	if (sndbuf_size <= 0)
+		sndbuf_size = 8 * 1024;
+
+	if (sndbuf_size > 8 * 1024 * 1024)
+		sndbuf_size = 8 * 1024 * 1024;
+	if (rcvbuf_size > 8 * 1024 * 1024)
+		rcvbuf_size = 8 * 1024 * 1024;
+
+	marg_sl = xsl_init();
+	if ((tmpdir = getenv("TMPDIR")) == NULL)
+		tmpdir = _PATH_TMP;
+
+	/* Set default operation mode based on FTPMODE environment variable */
+	if ((cp = getenv("FTPMODE")) != NULL) {
+		if (strcasecmp(cp, "passive") == 0) {
+			passivemode = 1;
+			activefallback = 0;
+		} else if (strcasecmp(cp, "active") == 0) {
+			passivemode = 0;
+			activefallback = 0;
+		} else if (strcasecmp(cp, "gate") == 0) {
+			gatemode = 1;
+		} else if (strcasecmp(cp, "auto") == 0) {
+			passivemode = 1;
+			activefallback = 1;
+		} else
+			warnx("unknown $FTPMODE '%s'; using defaults", cp);
+	}
+
+	if (strcmp(getprogname(), "pftp") == 0) {
+		passivemode = 1;
+		activefallback = 0;
+	} else if (strcmp(getprogname(), "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));
+	ttyout = stdout;
+	if (isatty(fileno(ttyout))) {
+		verbose = 1;		/* verbose if to a tty */
+		if (! dumbterm) {
+#ifndef NO_EDITCOMPLETE
+			if (fromatty)	/* editing mode on if tty is usable */
+				editing = 1;
+#endif
+#ifndef NO_PROGRESS
+			if (foregroundproc())
+				progress = 1;	/* progress bar on if fg */
+#endif
+		}
+	}
+
+	while ((ch = getopt(argc, argv, "46AadefginN:o:pP:q:r:RtT:u:vV")) != -1) {
+		switch (ch) {
+		case '4':
+			family = AF_INET;
+			break;
+
+		case '6':
+#ifdef INET6
+			family = AF_INET6;
+#else
+			warnx("INET6 support is not available; ignoring -6");
+#endif
+			break;
+
+		case 'A':
+			activefallback = 0;
+			passivemode = 0;
+			break;
+
+		case 'a':
+			anonftp = 1;
+			break;
+
+		case 'd':
+			options |= SO_DEBUG;
+			debug++;
+			break;
+
+		case 'e':
+#ifndef NO_EDITCOMPLETE
+			editing = 0;
+#endif
+			break;
+
+		case 'f':
+			flushcache = 1;
+			break;
+
+		case 'g':
+			doglob = 0;
+			break;
+
+		case 'i':
+			interactive = 0;
+			break;
+
+		case 'n':
+			autologin = 0;
+			break;
+
+		case 'N':
+			if (strlcpy(netrc, optarg, sizeof(netrc))
+			    >= sizeof(netrc))
+				errx(1, "%s: %s", optarg,
+				    strerror(ENAMETOOLONG));
+			break;
+
+		case 'o':
+			outfile = optarg;
+			if (strcmp(outfile, "-") == 0)
+				ttyout = stderr;
+			break;
+
+		case 'p':
+			passivemode = 1;
+			activefallback = 0;
+			break;
+
+		case 'P':
+			ftpport = optarg;
+			break;
+
+		case 'q':
+			quit_time = strtol(optarg, &ep, 10);
+			if (quit_time < 1 || *ep != '\0')
+				errx(1, "bad quit value: %s", optarg);
+			break;
+
+		case 'r':
+			retry_connect = strtol(optarg, &ep, 10);
+			if (retry_connect < 1 || *ep != '\0')
+				errx(1, "bad retry value: %s", optarg);
+			break;
+
+		case 'R':
+			restartautofetch = 1;
+			break;
+
+		case 't':
+			trace = 1;
+			break;
+
+		case 'T':
+		{
+			int targc;
+			char *targv[6], *oac;
+
+				/* look for `dir,max[,incr]' */
+			targc = 0;
+			targv[targc++] = "-T";
+			oac = xstrdup(optarg);
+
+			while ((cp = strsep(&oac, ",")) != NULL) {
+				if (*cp == '\0') {
+					warnx("bad throttle value: %s", optarg);
+					usage();
+					/* NOTREACHED */
+				}
+				targv[targc++] = cp;
+				if (targc >= 5)
+					break;
+			}
+			if (parserate(targc, targv, 1) == -1)
+				usage();
+			free(oac);
+			break;
+		}
+
+		case 'u':
+		{
+			isupload = 1;
+			interactive = 0;
+			upload_path = xstrdup(optarg);
+
+			break;
+		}
+
+		case 'v':
+			progress = verbose = 1;
+			break;
+
+		case 'V':
+			progress = verbose = 0;
+			break;
+
+		default:
+			usage();
+		}
+	}
+			/* set line buffering on ttyout */
+	setvbuf(ttyout, NULL, _IOLBF, 0);
+	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 */
+
+	/*
+	 * Cache the user name and home directory.
+	 */
+	localhome = NULL;
+	localname = NULL;
+	anonuser = "anonymous";
+	cp = getenv("HOME");
+	if (! EMPTYSTRING(cp))
+		localhome = xstrdup(cp);
+	pw = NULL;
+	cp = getlogin();
+	if (cp != NULL)
+		pw = getpwnam(cp);
+	if (pw == NULL)
+		pw = getpwuid(getuid());
+	if (pw != NULL) {
+		if (localhome == NULL && !EMPTYSTRING(pw->pw_dir))
+			localhome = xstrdup(pw->pw_dir);
+		localname = xstrdup(pw->pw_name);
+		anonuser = localname;
+	}
+	if (netrc[0] == '\0' && localhome != NULL) {
+		if (strlcpy(netrc, localhome, sizeof(netrc)) >= sizeof(netrc) ||
+		    strlcat(netrc, "/.netrc", sizeof(netrc)) >= sizeof(netrc)) {
+			warnx("%s/.netrc: %s", localhome,
+			    strerror(ENAMETOOLONG));
+			netrc[0] = '\0';
+		}
+	}
+	if (localhome == NULL)
+		localhome = xstrdup("/");
+
+	/*
+	 * Every anonymous FTP server I've encountered will accept the
+	 * string "username@", and will append the hostname itself. We
+	 * do this by default since many servers are picky about not
+	 * having a FQDN in the anonymous password.
+	 * - thorpej@NetBSD.org
+	 */
+	len = strlen(anonuser) + 2;
+	anonpass = xmalloc(len);
+	(void)strlcpy(anonpass, anonuser, len);
+	(void)strlcat(anonpass, "@",	  len);
+
+			/*
+			 * set all the defaults for options defined in
+			 * struct option optiontab[]  declared in cmdtab.c
+			 */
+	setupoption("anonpass",		getenv("FTPANONPASS"),	anonpass);
+	setupoption("ftp_proxy",	getenv(FTP_PROXY),	"");
+	setupoption("http_proxy",	getenv(HTTP_PROXY),	"");
+	setupoption("no_proxy",		getenv(NO_PROXY),	"");
+	setupoption("pager",		getenv("PAGER"),	DEFAULTPAGER);
+	setupoption("prompt",		getenv("FTPPROMPT"),	DEFAULTPROMPT);
+	setupoption("rprompt",		getenv("FTPRPROMPT"),	DEFAULTRPROMPT);
+
+	free(anonpass);
+
+	setttywidth(0);
+#ifdef SIGINFO
+	(void)xsignal(SIGINFO, psummary);
+#endif
+	(void)xsignal(SIGQUIT, psummary);
+	(void)xsignal(SIGUSR1, crankrate);
+	(void)xsignal(SIGUSR2, crankrate);
+	(void)xsignal(SIGWINCH, setttywidth);
+
+#ifdef __GNUC__			/* to shut up gcc warnings */
+	(void)&argc;
+	(void)&argv;
+#endif
+
+	if (argc > 0) {
+		if (isupload) {
+			rval = auto_put(argc, argv, upload_path);
+ sigint_or_rval_exit:
+			if (sigint_raised) {
+				(void)xsignal(SIGINT, SIG_DFL);
+				raise(SIGINT);
+			}
+			exit(rval);
+		} else if (strchr(argv[0], ':') != NULL
+			    && ! isipv6addr(argv[0])) {
+			rval = auto_fetch(argc, argv);
+			if (rval >= 0)		/* -1 == connected and cd-ed */
+				goto sigint_or_rval_exit;
+		} else {
+			char *xargv[4], *user, *host;
+
+			if ((rval = sigsetjmp(toplevel, 1)))
+				goto sigint_or_rval_exit;
+			(void)xsignal(SIGINT, intr);
+			(void)xsignal(SIGPIPE, lostpeer);
+			user = NULL;
+			host = argv[0];
+			cp = strchr(host, '@');
+			if (cp) {
+				*cp = '\0';
+				user = host;
+				host = cp + 1;
+			}
+			/* XXX discards const */
+			xargv[0] = (char *)getprogname();
+			xargv[1] = host;
+			xargv[2] = argv[1];
+			xargv[3] = NULL;
+			do {
+				int oautologin;
+
+				oautologin = autologin;
+				if (user != NULL) {
+					anonftp = 0;
+					autologin = 0;
+				}
+				setpeer(argc+1, xargv);
+				autologin = oautologin;
+				if (connected == 1 && user != NULL)
+					(void)ftp_login(host, user, NULL);
+				if (!retry_connect)
+					break;
+				if (!connected) {
+					macnum = 0;
+					fprintf(ttyout,
+					    "Retrying in %d seconds...\n",
+					    retry_connect);
+					sleep(retry_connect);
+				}
+			} while (!connected);
+			retry_connect = 0; /* connected, stop hiding msgs */
+		}
+	}
+	if (isupload)
+		usage();
+
+#ifndef NO_EDITCOMPLETE
+	controlediting();
+#endif /* !NO_EDITCOMPLETE */
+
+	(void)sigsetjmp(toplevel, 1);
+	(void)xsignal(SIGINT, intr);
+	(void)xsignal(SIGPIPE, lostpeer);
+	for (;;)
+		cmdscanner();
+}
+
+/*
+ * Generate a prompt
+ */
+char *
+prompt(void)
+{
+	static char	**prompt;
+	static char	  buf[MAXPATHLEN];
+
+	if (prompt == NULL) {
+		struct option *o;
+
+		o = getoption("prompt");
+		if (o == NULL)
+			errx(1, "no such option `prompt'");
+		prompt = &(o->value);
+	}
+	formatbuf(buf, sizeof(buf), *prompt ? *prompt : DEFAULTPROMPT);
+	return (buf);
+}
+
+/*
+ * Generate an rprompt
+ */
+char *
+rprompt(void)
+{
+	static char	**rprompt;
+	static char	  buf[MAXPATHLEN];
+
+	if (rprompt == NULL) {
+		struct option *o;
+
+		o = getoption("rprompt");
+		if (o == NULL)
+			errx(1, "no such option `rprompt'");
+		rprompt = &(o->value);
+	}
+	formatbuf(buf, sizeof(buf), *rprompt ? *rprompt : DEFAULTRPROMPT);
+	return (buf);
+}
+
+/*
+ * Command parser.
+ */
+void
+cmdscanner(void)
+{
+	struct cmd	*c;
+	char		*p;
+	int		 num;
+
+	for (;;) {
+#ifndef NO_EDITCOMPLETE
+		if (!editing) {
+#endif /* !NO_EDITCOMPLETE */
+			if (fromatty) {
+				fputs(prompt(), ttyout);
+				p = rprompt();
+				if (*p)
+					fprintf(ttyout, "%s ", p);
+				(void)fflush(ttyout);
+			}
+			if (fgets(line, sizeof(line), stdin) == NULL) {
+				if (fromatty)
+					putc('\n', ttyout);
+				quit(0, NULL);
+			}
+			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 is too long.\n",
+				    ttyout);
+				while ((num = getchar()) != '\n' && num != EOF)
+					/* void */;
+				break;
+			} /* else it was a line without a newline */
+#ifndef NO_EDITCOMPLETE
+		} else {
+			const char *buf;
+			HistEvent ev;
+			cursor_pos = NULL;
+
+			buf = el_gets(el, &num);
+			if (buf == NULL || num == 0) {
+				if (fromatty)
+					putc('\n', ttyout);
+				quit(0, NULL);
+			}
+			if (num >= sizeof(line)) {
+				fputs("Sorry, input line is too long.\n",
+				    ttyout);
+				break;
+			}
+			memcpy(line, buf, num);
+			if (line[--num] == '\n') {
+				line[num] = '\0';
+				if (num == 0)
+					break;
+			}
+			history(hist, &ev, H_ENTER, buf);
+		}
+#endif /* !NO_EDITCOMPLETE */
+
+		makeargv();
+		if (margc == 0)
+			continue;
+		c = getcmd(margv[0]);
+		if (c == (struct cmd *)-1) {
+			fputs("?Ambiguous command.\n", ttyout);
+			continue;
+		}
+		if (c == NULL) {
+#if !defined(NO_EDITCOMPLETE)
+			/*
+			 * attempt to el_parse() unknown commands.
+			 * any command containing a ':' would be parsed
+			 * as "[prog:]cmd ...", and will result in a
+			 * false positive if prog != "ftp", so treat
+			 * such commands as invalid.
+			 */
+			if (strchr(margv[0], ':') != NULL ||
+			    el_parse(el, margc, (const char **)margv) != 0)
+#endif /* !NO_EDITCOMPLETE */
+				fputs("?Invalid command.\n", ttyout);
+			continue;
+		}
+		if (c->c_conn && !connected) {
+			fputs("Not connected.\n", ttyout);
+			continue;
+		}
+		confirmrest = 0;
+		margv[0] = c->c_name;
+		(*c->c_handler)(margc, margv);
+		if (bell && c->c_bell)
+			(void)putc('\007', ttyout);
+		if (c->c_handler != help)
+			break;
+	}
+	(void)xsignal(SIGINT, intr);
+	(void)xsignal(SIGPIPE, 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();
+		xsl_add(marg_sl, argp);
+		if (argp == NULL)
+			break;
+	}
+#ifndef NO_EDITCOMPLETE
+	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 /* !NO_EDITCOMPLETE */
+}
+
+#ifdef NO_EDITCOMPLETE
+#define	INC_CHKCURSOR(x)	(x)++
+#else  /* !NO_EDITCOMPLETE */
+#define	INC_CHKCURSOR(x)	{ (x)++ ; \
+				if (x == cursor_pos) { \
+					cursor_argc = margc; \
+					cursor_argo = ap-argbase; \
+					cursor_pos = NULL; \
+				} }
+
+#endif /* !NO_EDITCOMPLETE */
+
+/*
+ * 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 = NULL;
+			break;
+		default:
+			break;
+	}
+	return (NULL);
+}
+
+/*
+ * Help/usage command.
+ * Call each command handler with argc == 0 and argv[0] == name.
+ */
+void
+help(int argc, char *argv[])
+{
+	struct cmd *c;
+	char *nargv[1], *p, *cmd;
+	int isusage;
+
+	cmd = argv[0];
+	isusage = (strcmp(cmd, "usage") == 0);
+	if (argc == 0 || (isusage && argc == 1)) {
+		fprintf(ttyout, "usage: %s [command [...]]\n", cmd);
+		return;
+	}
+	if (argc == 1) {
+		StringList *buf;
+
+		buf = xsl_init();
+		fprintf(ttyout,
+		    "%sommands may be abbreviated.  Commands are:\n\n",
+		    proxy ? "Proxy c" : "C");
+		for (c = cmdtab; (p = c->c_name) != NULL; c++)
+			if (!proxy || c->c_proxy)
+				xsl_add(buf, p);
+		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 %s command `%s'\n",
+			    cmd, arg);
+		else if (c == NULL)
+			fprintf(ttyout, "?Invalid %s command `%s'\n",
+			    cmd, arg);
+		else {
+			if (isusage) {
+				nargv[0] = c->c_name;
+				(*c->c_handler)(0, nargv);
+			} else
+				fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
+				    c->c_name, c->c_help);
+		}
+	}
+}
+
+struct option *
+getoption(const char *name)
+{
+	const char *p;
+	struct option *c;
+
+	if (name == NULL)
+		return (NULL);
+	for (c = optiontab; (p = c->name) != NULL; c++) {
+		if (strcasecmp(p, name) == 0)
+			return (c);
+	}
+	return (NULL);
+}
+
+char *
+getoptionvalue(const char *name)
+{
+	struct option *c;
+
+	if (name == NULL)
+		errx(1, "getoptionvalue() invoked with NULL name");
+	c = getoption(name);
+	if (c != NULL)
+		return (c->value);
+	errx(1, "getoptionvalue() invoked with unknown option `%s'", name);
+	/* NOTREACHED */
+}
+
+static void
+setupoption(char *name, char *value, char *defaultvalue)
+{
+	char *nargv[3];
+	int overbose;
+
+	nargv[0] = "setupoption()";
+	nargv[1] = name;
+	nargv[2] = (value ? value : defaultvalue);
+	overbose = verbose;
+	verbose = 0;
+	setoption(3, nargv);
+	verbose = overbose;
+}
+
+void
+usage(void)
+{
+	const char *progname = getprogname();
+
+	(void)fprintf(stderr,
+"usage: %s [-46AadefginpRtvV] [-N netrc] [-o outfile] [-P port] [-q quittime]\n"
+"           [-r retry] [-T dir,max[,inc][[user@]host [port]]] [host:path[/]]\n"
+"           [file:///file] [ftp://[user[:pass]@]host[:port]/path[/]]\n"
+"           [http://[user[:pass]@]host[:port]/path] [...]\n"
+"       %s -u URL file [...]\n", progname, progname);
+	exit(1);
+}