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Replace <sys/param.h> with <limits.h> and other less dirty headers where
possible.  Annotate <sys/param.h> lines with their current reasons.  Switch
to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1, LOGIN_NAME_MAX, etc.  Change
MIN() and MAX() to local definitions of MINIMUM() and MAXIMUM() where
sensible to avoid pulling in the pollution.  These are the files confirmed
through binary verification.
ok guenther, millert, doug (helped with the verification protocol)

/*	$OpenBSD: small.c,v 1.3 2015/01/16 06:40:08 deraadt Exp $	*/
/*	$NetBSD: cmds.c,v 1.27 1997/08/18 10:20:15 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 Routines.
 */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <arpa/ftp.h>

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

#include "ftp_var.h"
#include "pathnames.h"
#include "small.h"

jmp_buf	jabort;
char   *mname;
char   *home = "/";

struct	types {
	char	*t_name;
	char	*t_mode;
	int	t_type;
	char	*t_arg;
} types[] = {
	{ "ascii",	"A",	TYPE_A,	0 },
	{ "binary",	"I",	TYPE_I,	0 },
	{ "image",	"I",	TYPE_I,	0 },
	{ "ebcdic",	"E",	TYPE_E,	0 },
	{ "tenex",	"L",	TYPE_L,	bytename },
	{ NULL }
};

/*
 * Set transfer type.
 */
void
settype(int argc, char *argv[])
{
	struct types *p;
	int comret;

	if (argc > 2) {
		char *sep;

		fprintf(ttyout, "usage: %s [", argv[0]);
		sep = "";
		for (p = types; p->t_name; p++) {
			fprintf(ttyout, "%s%s", sep, p->t_name);
			sep = " | ";
		}
		fputs("]\n", ttyout);
		code = -1;
		return;
	}
	if (argc < 2) {
		fprintf(ttyout, "Using %s mode to transfer files.\n", typename);
		code = 0;
		return;
	}
	for (p = types; p->t_name; p++)
		if (strcmp(argv[1], p->t_name) == 0)
			break;
	if (p->t_name == 0) {
		fprintf(ttyout, "%s: unknown mode.\n", argv[1]);
		code = -1;
		return;
	}
	if ((p->t_arg != NULL) && (*(p->t_arg) != '\0'))
		comret = command("TYPE %s %s", p->t_mode, p->t_arg);
	else
		comret = command("TYPE %s", p->t_mode);
	if (comret == COMPLETE) {
		(void)strlcpy(typename, p->t_name, sizeof typename);
		curtype = type = p->t_type;
	}
}

/*
 * Internal form of settype; changes current type in use with server
 * without changing our notion of the type for data transfers.
 * Used to change to and from ascii for listings.
 */
void
changetype(int newtype, int show)
{
	struct types *p;
	int comret, oldverbose = verbose;

	if (newtype == 0)
		newtype = TYPE_I;
	if (newtype == curtype)
		return;
	if (
#ifndef SMALL
	    !debug &&
#endif /* !SMALL */
	    show == 0)
		verbose = 0;
	for (p = types; p->t_name; p++)
		if (newtype == p->t_type)
			break;
	if (p->t_name == 0) {
		warnx("internal error: unknown type %d.", newtype);
		return;
	}
	if (newtype == TYPE_L && bytename[0] != '\0')
		comret = command("TYPE %s %s", p->t_mode, bytename);
	else
		comret = command("TYPE %s", p->t_mode);
	if (comret == COMPLETE)
		curtype = newtype;
	verbose = oldverbose;
}

char *stype[] = {
	"type",
	"",
	0
};

/*
 * Set binary transfer type.
 */
/*ARGSUSED*/
void
setbinary(int argc, char *argv[])
{

	stype[1] = "binary";
	settype(2, stype);
}

void
get(int argc, char *argv[])
{

	(void)getit(argc, argv, 0, restart_point ? "a+w" : "w" );
}

/*
 * Receive one file.
 */
int
getit(int argc, char *argv[], int restartit, const char *mode)
{
	int loc = 0;
	int rval = 0;
	char *oldargv1, *oldargv2, *globargv2;

	if (argc == 2) {
		argc++;
		argv[2] = argv[1];
		loc++;
	}
#ifndef SMALL
	if (argc < 2 && !another(&argc, &argv, "remote-file"))
		goto usage;
	if ((argc < 3 && !another(&argc, &argv, "local-file")) || argc > 3) {
usage:
		fprintf(ttyout, "usage: %s remote-file [local-file]\n",
		    argv[0]);
		code = -1;
		return (0);
	}
#endif /* !SMALL */
	oldargv1 = argv[1];
	oldargv2 = argv[2];
	if (!globulize(&argv[2])) {
		code = -1;
		return (0);
	}
	globargv2 = argv[2];
	if (loc && mcase) {
		char *tp = argv[1], *tp2, tmpbuf[PATH_MAX];

		while (*tp && !islower(*tp)) {
			tp++;
		}
		if (!*tp) {
			tp = argv[2];
			tp2 = tmpbuf;
			while ((*tp2 = *tp) != '\0') {
				if (isupper(*tp2)) {
					*tp2 = tolower(*tp2);
				}
				tp++;
				tp2++;
			}
			argv[2] = tmpbuf;
		}
	}
	if (loc && ntflag)
		argv[2] = dotrans(argv[2]);
	if (loc && mapflag)
		argv[2] = domap(argv[2]);
#ifndef SMALL
	if (restartit) {
		struct stat stbuf;
		int ret;

		ret = stat(argv[2], &stbuf);
		if (restartit == 1) {
			restart_point = (ret < 0) ? 0 : stbuf.st_size;
		} else {
			if (ret == 0) {
				time_t mtime;

				mtime = remotemodtime(argv[1], 0);
				if (mtime == -1)
					goto freegetit;
				if (stbuf.st_mtime >= mtime) {
					rval = 1;
					goto freegetit;
				}
			}
		}
	}
#endif /* !SMALL */

	recvrequest("RETR", argv[2], argv[1], mode,
	    argv[1] != oldargv1 || argv[2] != oldargv2 || !interactive, loc);
	restart_point = 0;
freegetit:
	if (oldargv2 != globargv2)	/* free up after globulize() */
		free(globargv2);
	return (rval);
}

/* XXX - Signal race. */
/* ARGSUSED */
void
mabort(int signo)
{
	int save_errno = errno;

	alarmtimer(0);
	(void) write(fileno(ttyout), "\n\r", 2);
#ifndef SMALL
	if (mflag && fromatty) {
		/* XXX signal race, crazy unbelievable stdio misuse */
		if (confirm(mname, NULL)) {
			errno = save_errno;
			longjmp(jabort, 1);
		}
	}
#endif /* !SMALL */
	mflag = 0;
	errno = save_errno;
	longjmp(jabort, 1);
}

/*
 * Get multiple files.
 */
void
mget(int argc, char *argv[])
{
	extern int optind, optreset;
	sig_t oldintr;
	int ch, xargc = 2;
	char *cp, localcwd[PATH_MAX], *xargv[] = { argv[0], NULL, NULL };
	static int restartit = 0;
#ifndef SMALL
	extern char *optarg;
	const char *errstr;
	int i = 1;
	char type = 0, *dummyargv[] = { argv[0], ".", NULL };
	FILE *ftemp = NULL;
	static int depth = 0, max_depth = 0;

	optind = optreset = 1;

	if (depth)
		depth++;

	while ((ch = getopt(argc, argv, "cd:nr")) != -1) {
		switch(ch) {
		case 'c':
			restartit = 1;
			break;
		case 'd':
			max_depth = strtonum(optarg, 0, INT_MAX, &errstr);
			if (errstr != NULL) {
				fprintf(ttyout, "bad depth value, %s: %s\n",
				    errstr, optarg);
				code = -1;
				return;
			}
			break;
		case 'n':
			restartit = -1;
			break;
		case 'r':
			depth = 1;
			break;
		default:
			goto usage;
		}
	}

	if (argc - optind < 1 && !another(&argc, &argv, "remote-files")) {
usage:
		fprintf(ttyout, "usage: %s [-cnr] [-d depth] remote-files\n",
		    argv[0]);
		code = -1;
		return;
	}

	argv[optind - 1] = argv[0];
	argc -= optind - 1;
	argv += optind - 1;
#endif /* !SMALL */

	mname = argv[0];
	mflag = 1;
	if (getcwd(localcwd, sizeof(localcwd)) == NULL)
		err(1, "can't get cwd");

	oldintr = signal(SIGINT, mabort);
	(void)setjmp(jabort);
	while ((cp =
#ifdef SMALL
	    remglob(argv, proxy, NULL)) != NULL
	    ) {
#else /* SMALL */
	    depth ? remglob2(dummyargv, proxy, NULL, &ftemp, &type) :
	    remglob(argv, proxy, NULL)) != NULL
	    || (mflag && depth && ++i < argc)
	    ) {
		if (cp == NULL)
			continue;
#endif /* SMALL */
		if (*cp == '\0') {
			mflag = 0;
			continue;
		}
		if (!mflag)
			continue;
#ifndef SMALL
		if (depth && fnmatch(argv[i], cp, FNM_PATHNAME) != 0)
			continue;
#endif /* !SMALL */
		if (!fileindir(cp, localcwd)) {
			fprintf(ttyout, "Skipping non-relative filename `%s'\n",
			    cp);
			continue;
		}
#ifndef SMALL
		if (type == 'd' && depth == max_depth)
			continue;
		if (!confirm(argv[0], cp))
			continue;
		if (type == 'd') {
			mkdir(cp, 0755);
			if (chdir(cp) != 0) {
				warn("local: %s", cp);
				continue;
			}

			xargv[1] = cp;
			cd(xargc, xargv);
			if (dirchange != 1)
				goto out;

			xargv[1] = "*";
			mget(xargc, xargv);

			xargv[1] = "..";
			cd(xargc, xargv);
			if (dirchange != 1) {
				mflag = 0;
				goto out;
			}

out:
			if (chdir("..") != 0) {
				warn("local: %s", cp);
				mflag = 0;
			}
			continue;
		}
		if (type == 's')
			/* Currently ignored. */
			continue;
#endif /* !SMALL */
		xargv[1] = cp;
		(void)getit(xargc, xargv, restartit,
		    (restartit == 1 || restart_point) ? "a+w" : "w");
#ifndef SMALL
		if (!mflag && fromatty) {
			if (confirm(argv[0], NULL))
				mflag = 1;
		}
#endif /* !SMALL */
	}
	(void)signal(SIGINT, oldintr);
#ifndef SMALL
	if (depth)
		depth--;
	if (depth == 0 || mflag == 0)
		depth = max_depth = mflag = restartit = 0;
#else /* !SMALL */
	mflag = 0;
#endif /* !SMALL */
}

/*
 * Set current working directory on remote machine.
 */
void
cd(int argc, char *argv[])
{
	int r;

#ifndef SMALL
	if ((argc < 2 && !another(&argc, &argv, "remote-directory")) ||
	    argc > 2) {
		fprintf(ttyout, "usage: %s remote-directory\n", argv[0]);
		code = -1;
		return;
	}
#endif /* !SMALL */
	r = command("CWD %s", argv[1]);
	if (r == ERROR && code == 500) {
		if (verbose)
			fputs("CWD command not recognized, trying XCWD.\n", ttyout);
		r = command("XCWD %s", argv[1]);
	}
	if (r == ERROR && code == 550) {
		dirchange = 0;
		return;
	}
	if (r == COMPLETE)
		dirchange = 1;
}

/*
 * Terminate session, but don't exit.
 */
/* ARGSUSED */
void
disconnect(int argc, char *argv[])
{

	if (!connected)
		return;
	(void)command("QUIT");
	if (cout) {
		(void)fclose(cout);
	}
	cout = NULL;
	connected = 0;
	data = -1;
#ifndef SMALL
	if (!proxy) {
		macnum = 0;
	}
#endif /* !SMALL */
}

char *
dotrans(char *name)
{
	static char new[PATH_MAX];
	char *cp1, *cp2 = new;
	int i, ostop, found;

	for (ostop = 0; *(ntout + ostop) && ostop < 16; ostop++)
		continue;
	for (cp1 = name; *cp1; cp1++) {
		found = 0;
		for (i = 0; *(ntin + i) && i < 16; i++) {
			if (*cp1 == *(ntin + i)) {
				found++;
				if (i < ostop) {
					*cp2++ = *(ntout + i);
				}
				break;
			}
		}
		if (!found) {
			*cp2++ = *cp1;
		}
	}
	*cp2 = '\0';
	return (new);
}

char *
domap(char *name)
{
	static char new[PATH_MAX];
	char *cp1 = name, *cp2 = mapin;
	char *tp[9], *te[9];
	int i, toks[9], toknum = 0, match = 1;

	for (i=0; i < 9; ++i) {
		toks[i] = 0;
	}
	while (match && *cp1 && *cp2) {
		switch (*cp2) {
			case '\\':
				if (*++cp2 != *cp1) {
					match = 0;
				}
				break;
			case '$':
				if (*(cp2+1) >= '1' && (*cp2+1) <= '9') {
					if (*cp1 != *(++cp2+1)) {
						toks[toknum = *cp2 - '1']++;
						tp[toknum] = cp1;
						while (*++cp1 && *(cp2+1)
							!= *cp1);
						te[toknum] = cp1;
					}
					cp2++;
					break;
				}
				/* FALLTHROUGH */
			default:
				if (*cp2 != *cp1) {
					match = 0;
				}
				break;
		}
		if (match && *cp1) {
			cp1++;
		}
		if (match && *cp2) {
			cp2++;
		}
	}
	if (!match && *cp1) /* last token mismatch */
	{
		toks[toknum] = 0;
	}
	cp1 = new;
	*cp1 = '\0';
	cp2 = mapout;
	while (*cp2) {
		match = 0;
		switch (*cp2) {
			case '\\':
				if (*(cp2 + 1)) {
					*cp1++ = *++cp2;
				}
				break;
			case '[':
LOOP:
				if (*++cp2 == '$' && isdigit(*(cp2+1))) {
					if (*++cp2 == '0') {
						char *cp3 = name;

						while (*cp3) {
							*cp1++ = *cp3++;
						}
						match = 1;
					}
					else if (toks[toknum = *cp2 - '1']) {
						char *cp3 = tp[toknum];

						while (cp3 != te[toknum]) {
							*cp1++ = *cp3++;
						}
						match = 1;
					}
				}
				else {
					while (*cp2 && *cp2 != ',' &&
					    *cp2 != ']') {
						if (*cp2 == '\\') {
							cp2++;
						}
						else if (*cp2 == '$' &&
   						        isdigit(*(cp2+1))) {
							if (*++cp2 == '0') {
							   char *cp3 = name;

							   while (*cp3) {
								*cp1++ = *cp3++;
							   }
							}
							else if (toks[toknum =
							    *cp2 - '1']) {
							   char *cp3=tp[toknum];

							   while (cp3 !=
								  te[toknum]) {
								*cp1++ = *cp3++;
							   }
							}
						}
						else if (*cp2) {
							*cp1++ = *cp2++;
						}
					}
					if (!*cp2) {
						fputs(
"nmap: unbalanced brackets.\n", ttyout);
						return (name);
					}
					match = 1;
					cp2--;
				}
				if (match) {
					while (*++cp2 && *cp2 != ']') {
					      if (*cp2 == '\\' && *(cp2 + 1)) {
							cp2++;
					      }
					}
					if (!*cp2) {
						fputs(
"nmap: unbalanced brackets.\n", ttyout);
						return (name);
					}
					break;
				}
				switch (*++cp2) {
					case ',':
						goto LOOP;
					case ']':
						break;
					default:
						cp2--;
						goto LOOP;
				}
				break;
			case '$':
				if (isdigit(*(cp2 + 1))) {
					if (*++cp2 == '0') {
						char *cp3 = name;

						while (*cp3) {
							*cp1++ = *cp3++;
						}
					}
					else if (toks[toknum = *cp2 - '1']) {
						char *cp3 = tp[toknum];

						while (cp3 != te[toknum]) {
							*cp1++ = *cp3++;
						}
					}
					break;
				}
				/* FALLTHROUGH */
			default:
				*cp1++ = *cp2;
				break;
		}
		cp2++;
	}
	*cp1 = '\0';
	if (!*new) {
		return (name);
	}
	return (new);
}