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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: rdist.c,v 1.19 2009/10/27 23:59:42 deraadt Exp $	*/

/*
 * Copyright (c) 1983 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 "defs.h"
#include "y.tab.h"

#include <netdb.h>
#include <sys/ioctl.h>

/*
 * Remote distribution program.
 */

char   	       *distfile = NULL;		/* Name of distfile to use */
int     	maxchildren = MAXCHILDREN;	/* Max no of concurrent PIDs */
int		nflag = 0;			/* Say without doing */
long		min_freespace = 0;		/* Min filesys free space */
long		min_freefiles = 0;		/* Min filesys free # files */
FILE   	       *fin = NULL;			/* Input file pointer */
char		localmsglist[] = "stdout=all:notify=all:syslog=nerror,ferror";
char   	       *remotemsglist = NULL;
char		optchars[] = "A:a:bcd:DFf:hil:L:M:m:NnOo:p:P:qRrst:Vvwxy";
char	       *path_rdistd = _PATH_RDISTD;
char	       *path_remsh = NULL;

static void addhostlist(char *, struct namelist **);
static void usage(void);
int main(int, char **, char **);

/*
 * Add a hostname to the host list
 */
static void
addhostlist(char *name, struct namelist **hostlist)
{
	struct namelist *ptr, *new;

	if (!name || !hostlist)
		return;

	new = (struct namelist *) xmalloc(sizeof(struct namelist));
	new->n_name = xstrdup(name);
	new->n_regex = NULL;
	new->n_next = NULL;

	if (*hostlist) {
		for (ptr = *hostlist; ptr && ptr->n_next; ptr = ptr->n_next)
			;
		ptr->n_next = new;
	} else
		*hostlist = new;
}

int
main(int argc, char **argv, char **envp)
{
	extern char *__progname;
	struct namelist *hostlist = NULL;
	int x;
	char *cp;
	int cmdargs = 0;
	int c;

	progname = __progname;

	if ((cp = msgparseopts(localmsglist, TRUE)) != NULL) {
		error("Bad builtin log option (%s): %s.", 
		      localmsglist, cp);
		usage();
	}

	if ((cp = getenv("RDIST_OPTIONS")) != NULL)
		if (parsedistopts(cp, &options, TRUE)) {
			error("Bad dist option environment string \"%s\".", 
			      cp);
			exit(1);
		}

	if (init(argc, argv, envp) < 0)
		exit(1);

	/*
	 * Be backwards compatible.
	 */
	for (x = 1; x <= argc && argv[x]; x++) {
		if (strcmp(argv[x], "-Server") != 0)
			continue;
#if	defined(_PATH_OLDRDIST)
		message(MT_SYSLOG, 
			"Old rdist (-Server) requested; running %s", 
			_PATH_OLDRDIST);
		(void) execl(_PATH_OLDRDIST, xbasename(_PATH_OLDRDIST), 
			     "-Server", (char *)NULL);
		fatalerr("Exec old rdist failed: %s: %s.", 
			 _PATH_OLDRDIST, SYSERR);
#else	/* !_PATH_OLDRDIST */
		fatalerr("Old rdist not available.");
#endif	/* _PATH_OLDRDIST */
		exit(1);
	}

#if	defined(DIRECT_RCMD)
	if (becomeuser() != 0)
		exit(1);
#else	/* !DIRECT_RCMD */
	/*
	 * Perform check to make sure we are not incorrectly installed
	 * setuid to root or anybody else.
	 */
	if (getuid() != geteuid())
		fatalerr("This version of rdist should not be installed setuid.");
#endif	/* DIRECT_RCMD */

	while ((c = getopt(argc, argv, optchars)) != -1)
		switch (c) {
		case 'l':
			if ((cp = msgparseopts(optarg, TRUE)) != NULL) {
				error("Bad log option \"%s\": %s.", optarg,cp);
				usage();
			}
			break;

		case 'L':
			remotemsglist = xstrdup(optarg);
			break;

		case 'A':
		case 'a':
		case 'M':
		case 't':
			if (!isdigit((unsigned char)*optarg)) {
				error("\"%s\" is not a number.", optarg);
				usage();
			}
			if (c == 'a')
				min_freespace = atoi(optarg);
			else if (c == 'A')
				min_freefiles = atoi(optarg);
			else if (c == 'M')
				maxchildren = atoi(optarg);
			else if (c == 't')
				rtimeout = atoi(optarg);
			break;

		case 'F':
			do_fork = FALSE;
			break;

		case 'f':
			distfile = xstrdup(optarg);
			if (distfile[0] == '-' && distfile[1] == CNULL)
				fin = stdin;
			break;

		case 'm':
			addhostlist(optarg, &hostlist);
			break;

		case 'd':
			define(optarg);
			break;

		case 'D':
			debug = DM_ALL;
			if ((cp = msgparseopts("stdout=all,debug",
			    TRUE)) != NULL) {
				error("Enable debug messages failed: %s.", cp);
				usage();
			}
			break;

		case 'c':
			cmdargs++;
			break;

		case 'n':
			nflag++;
			break;

		case 'V':
			printf("%s\n", getversion());
			exit(0);

		case 'o':
			if (parsedistopts(optarg, &options, TRUE)) {
				error("Bad dist option string \"%s\".", 
				      optarg);
				usage();
			}
			break;

		case 'p':
			if (!optarg) {
				error("No path specified to \"-p\".");
				usage();
			}
			path_rdistd = xstrdup(optarg);
			break;

		case 'P':
			if (!optarg) {
				error("No path specified to \"-P\".");
				usage();
			}
			if ((cp = searchpath(optarg)) != NULL)
				path_remsh = xstrdup(cp);
			else {
				error("No component of path \"%s\" exists.",
				      optarg);
				usage();
			}
			break;

			/*
			 * These options are obsoleted by -o.  They are
			 * provided only for backwards compatibility
			 */
		case 'v':	FLAG_ON(options, DO_VERIFY);		break;
		case 'N':	FLAG_ON(options, DO_CHKNFS);		break;
		case 'O':	FLAG_ON(options, DO_CHKREADONLY);	break;
		case 'q':	FLAG_ON(options, DO_QUIET);		break;
		case 'b':	FLAG_ON(options, DO_COMPARE);		break;
		case 'r':	FLAG_ON(options, DO_NODESCEND);		break;
		case 'R':	FLAG_ON(options, DO_REMOVE);		break;
		case 's':	FLAG_ON(options, DO_SAVETARGETS);	break;
		case 'w':	FLAG_ON(options, DO_WHOLE);		break;
		case 'y':	FLAG_ON(options, DO_YOUNGER);		break;
		case 'h':	FLAG_ON(options, DO_FOLLOW);		break;
		case 'i':	FLAG_ON(options, DO_IGNLNKS);		break;
		case 'x':	FLAG_ON(options, DO_NOEXEC);		break;

		case '?':
		default:
			usage();
		}

	if (debug) {
		printf("%s\n", getversion());
		msgprconfig();
	}

	if (nflag && IS_ON(options, DO_VERIFY))
		fatalerr(
		 "The -n flag and \"verify\" mode may not both be used.");

	if (path_remsh == NULL) {
		if ((cp = getenv("RSH")) != NULL && *cp != '\0')
			path_remsh = cp;
		else
			path_remsh = _PATH_REMSH;
	}

	/*
	 * Don't fork children for nflag
	 */
	if (nflag)
		do_fork = 0;

	if (cmdargs)
		docmdargs(realargc - optind, &realargv[optind]);
	else {
		if (fin == NULL)
			fin = opendist(distfile);
		(void) yyparse();
		/*
		 * Need to keep stdin open for child processing later
		 */
		if (fin != stdin)
			(void) fclose(fin);
		if (nerrs == 0)
			docmds(hostlist, realargc-optind, &realargv[optind]);
	}

	exit(nerrs != 0);
}

/*
 * Open a distfile
 */
FILE *
opendist(char *distfile)
{
	char *file = NULL;
	FILE *fp;

	if (distfile == NULL) {
		if (access("distfile", R_OK) == 0)
			file = "distfile";
		else if (access("Distfile", R_OK) == 0)
			file = "Distfile";
	} else {
		/*
		 * Try to test to see if file is readable before running m4.
		 */
		if (access(distfile, R_OK) != 0)
			fatalerr("%s: Cannot access file: %s.", 
				 distfile, SYSERR);
		file = distfile;
	}

	if (file == NULL)
		fatalerr("No distfile found.");

	fp = fopen(file, "r");

	if (fp == NULL)
		fatalerr("%s: open failed: %s.", file, SYSERR);

	return(fp);
}

/*
 * Print usage message and exit.
 */
static void
usage(void)
{
	extern char *__progname;

	(void) fprintf(stderr,
		"usage: %s [-DFnV] [-Server] [-A num] [-a num] "
		"[-c mini_distfile]\n"
		"\t[-d var=value] [-f distfile] [-L remote_logopts] "
		"[-l local_logopts]\n"
		"\t[-M maxproc] [-m host] [-o distopts] [-P rsh-path] "
		"[-p rdistd-path]\n"
		"\t[-t timeout] [name ...]\n", __progname);


	(void) fprintf(stderr, "\nThe values for <distopts> are:\n\t%s\n",
		       getdistoptlist());

	msgprusage();

	exit(1);
}

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

	if (nargs < 2)
		usage();

	prev = NULL;
	files = 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;
	tnl.n_regex = NULL;
	tnl.n_next = NULL;
	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;
	}

	debugmsg(DM_MISC, "docmdargs()\nfiles = %s", getnlstr(files));
	debugmsg(DM_MISC, "host = %s", getnlstr(hosts));

	insert(NULL, files, hosts, cmds);
	docmds(NULL, 0, NULL);
}

/*
 * Get a list of NAME blocks (mostly for debugging).
 */
char *
getnlstr(struct namelist *nl)
{
	static char buf[16384];
	size_t len = 0;

	(void) snprintf(buf, sizeof(buf), "(");

	while (nl != NULL) {
		if (nl->n_name == NULL)
			continue;
		len += strlen(nl->n_name) + 2;
		if (len >= sizeof(buf)) {
			(void) strlcpy(buf,
				       "getnlstr() Buffer not large enough",
				       sizeof(buf));
			return(buf);
		}
		(void) strlcat(buf, " ", sizeof(buf));
		(void) strlcat(buf, nl->n_name, sizeof(buf));
		nl = nl->n_next;
	}

	(void) strlcat(buf, " )", sizeof(buf));

	return(buf);
}