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rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: main.c,v 1.21 2009/10/27 23:59:41 deraadt Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	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.
 */

#include <stdarg.h>
#include <libgen.h>
#include "defs.h"

#define NHOSTS 100

/*
 * Remote distribution program.
 */

char	*distfile = NULL;
#define _RDIST_TMP	"rdistXXXXXXXXXX"
char	tempfile[sizeof _PATH_TMP + sizeof _RDIST_TMP - 1];
char	*tempname;

int	debug;		/* debugging flag */
int	nflag;		/* NOP flag, just print commands without executing */
int	qflag;		/* Quiet. Don't print messages */
int	options;	/* global options */
int	iamremote;	/* act as remote server for transfering files */

FILE	*fin = NULL;	/* input file pointer */
int	rem = -1;	/* file descriptor to remote source/sink process */
char	host[MAXHOSTNAMELEN]; /* host name */
int	nerrs;		/* number of errors while sending/receiving */
char	user[MAXLOGNAME]; /* user's name */
char	homedir[MAXPATHLEN]; /* user's home directory */
uid_t	userid;		/* user's user ID */
gid_t	groupid;	/* user's group ID */

struct	passwd *pw;	/* pointer to static area used by getpwent */
struct	group *gr;	/* pointer to static area used by getgrent */

static void usage(void);
static void docmdargs(int, char *[]);

int
main(argc, argv)
	int argc;
	char *argv[];
{
	char *arg;
	int cmdargs = 0;
	char *dhosts[NHOSTS], **hp = dhosts;

	pw = getpwuid(userid = getuid());
	if (pw == NULL) {
		fprintf(stderr, "%s: Who are you?\n", argv[0]);
		exit(1);
	}
	strlcpy(user, pw->pw_name, sizeof user);
	strlcpy(homedir, pw->pw_dir, sizeof homedir);
	groupid = pw->pw_gid;
	gethostname(host, sizeof(host));
	strlcpy(tempfile, _PATH_TMP, sizeof tempfile);
	strlcat(tempfile, _RDIST_TMP, sizeof tempfile);
	tempname = basename(tempfile);

	while (--argc > 0) {
		if ((arg = *++argv)[0] != '-')
			break;
		if (!strcmp(arg, "-Server"))
			iamremote++;
		else while (*++arg)
			switch (*arg) {
			case 'f':
				if (--argc <= 0)
					usage();
				distfile = *++argv;
				if (distfile[0] == '-' && distfile[1] == '\0')
					fin = stdin;
				break;

			case 'm':
				if (--argc <= 0)
					usage();
				if (hp >= &dhosts[NHOSTS-2]) {
					fprintf(stderr, "rdist: too many destination hosts\n");
					exit(1);
				}
				*hp++ = *++argv;
				break;

			case 'd':
				if (--argc <= 0)
					usage();
				define(*++argv);
				break;

			case 'D':
				debug++;
				break;

			case 'c':
				cmdargs++;
				break;

			case 'n':
				if (options & VERIFY) {
					printf("rdist: -n overrides -v\n");
					options &= ~VERIFY;
				}
				nflag++;
				break;

			case 'q':
				qflag++;
				break;

			case 'b':
				options |= COMPARE;
				break;

			case 'R':
				options |= REMOVE;
				break;

			case 'v':
				if (nflag) {
					printf("rdist: -n overrides -v\n");
					break;
				}
				options |= VERIFY;
				break;

			case 'w':
				options |= WHOLE;
				break;

			case 'y':
				options |= YOUNGER;
				break;

			case 'h':
				options |= FOLLOW;
				break;

			case 'i':
				options |= IGNLNKS;
				break;

			default:
				usage();
			}
	}
	*hp = NULL;

#if	defined(DIRECT_RCMD)
	seteuid(userid);
#else	/* DIRECT_RCMD */
	if (!iamremote && getuid() != geteuid()) {
		error("This version of rdist should not be installed setuid.\n");
		exit(1);
	}
#endif	/* DIRECT_RCMD */

	if (mktemp(tempfile) == NULL)
		fatal("cannot get temp file\n");

	if (iamremote) {
		server();
		exit(nerrs != 0);
	}

	if (cmdargs)
		docmdargs(argc, argv);
	else {
		if (fin == NULL) {
			if (distfile == NULL) {
				if ((fin = fopen("distfile","r")) == NULL)
					fin = fopen("Distfile", "r");
			} else
				fin = fopen(distfile, "r");
			if (fin == NULL) {
				perror(distfile ? distfile : "distfile");
				exit(1);
			}
		}
		yyparse();
		if (nerrs == 0)
			docmds(dhosts, argc, argv);
	}

	exit(nerrs != 0);
}

static void
usage()
{
	printf(
	    "usage: rdist [-bhinqRvwy] [-d var=value] [-f distfile] [-m host] [name ...]\n"
	    "       rdist [-bhinqRvwy] -c name ...  [login@]host[:dest]\n");
	exit(1);
}

/*
 * rcp like interface for distributing files.
 */
static void
docmdargs(nargs, args)
	int nargs;
	char *args[];
{
	struct namelist *nl, *prev;
	char *cp;
	struct namelist *files, *hosts;
	struct subcmd *cmds;
	char *dest;
	static struct namelist tnl = { NULL, NULL };
	int i;

	if (nargs < 2)
		usage();

	prev = NULL;
	for (i = 0; i < nargs - 1; i++) {
		nl = makenl(args[i]);
		if (prev == NULL)
			files = prev = nl;
		else {
			prev->n_next = nl;
			prev = nl;
		}
	}

	cp = args[i];
	if ((dest = strchr(cp, ':')) != NULL)
		*dest++ = '\0';
	tnl.n_name = cp;
	hosts = expand(&tnl, E_ALL);
	if (nerrs)
		exit(1);

	if (dest == NULL || *dest == '\0')
		cmds = NULL;
	else {
		cmds = makesubcmd(INSTALL);
		cmds->sc_options = options;
		cmds->sc_name = dest;
	}

	if (debug) {
		printf("docmdargs()\nfiles = ");
		prnames(files);
		printf("hosts = ");
		prnames(hosts);
	}
	insert(NULL, files, hosts, cmds);
	docmds(NULL, 0, NULL);
}

/*
 * Print a list of NAME blocks (mostly for debugging).
 */
void
prnames(nl)
	struct namelist *nl;
{
	printf("( ");
	while (nl != NULL) {
		printf("%s ", nl->n_name);
		nl = nl->n_next;
	}
	printf(")\n");
}