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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

%{
/*
 * 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 "defs.h"

struct	cmd *cmds = NULL;
struct	cmd *last_cmd;
struct	namelist *last_n;
struct	subcmd *last_sc;

static char  *makestr(char *);

%}

%term EQUAL	1
%term LP	2
%term RP	3
%term SM	4
%term ARROW	5
%term COLON	6
%term DCOLON	7
%term NAME	8
%term STRING	9
%term INSTALL	10
%term NOTIFY	11
%term EXCEPT	12
%term PATTERN	13
%term SPECIAL	14
%term OPTION	15

%union {
	int intval;
	char *string;
	struct subcmd *subcmd;
	struct namelist *namel;
}

%type <intval> OPTION, options
%type <string> NAME, STRING
%type <subcmd> INSTALL, NOTIFY, EXCEPT, PATTERN, SPECIAL, cmdlist, cmd
%type <namel> namelist, names, opt_namelist

%%

file:		  /* VOID */
		| file command
		;

command:	  NAME EQUAL namelist = {
			(void) lookup($1, INSERT, $3);
		}
		| namelist ARROW namelist cmdlist = {
			insert(NULL, $1, $3, $4);
		}
		| NAME COLON namelist ARROW namelist cmdlist = {
			insert($1, $3, $5, $6);
		}
		| namelist DCOLON NAME cmdlist = {
			append(NULL, $1, $3, $4);
		}
		| NAME COLON namelist DCOLON NAME cmdlist = {
			append($1, $3, $5, $6);
		}
		| error
		;

namelist:	  NAME = {
			$$ = makenl($1);
		}
		| LP names RP = {
			$$ = $2;
		}
		;

names:		  /* VOID */ {
			$$ = last_n = NULL;
		}
		| names NAME = {
			if (last_n == NULL)
				$$ = last_n = makenl($2);
			else {
				last_n->n_next = makenl($2);
				last_n = last_n->n_next;
				$$ = $1;
			}
		}
		;

cmdlist:	  /* VOID */ {
			$$ = last_sc = NULL;
		}
		| cmdlist cmd = {
			if (last_sc == NULL)
				$$ = last_sc = $2;
			else {
				last_sc->sc_next = $2;
				last_sc = $2;
				$$ = $1;
			}
		}
		;

cmd:		  INSTALL options opt_namelist SM = {
			register struct namelist *nl;

			$1->sc_options = $2 | options;
			if ($3 != NULL) {
				nl = expand($3, E_VARS);
				if (nl) {
					if (nl->n_next != NULL)
					    yyerror("only one name allowed\n");
					$1->sc_name = nl->n_name;
					free(nl);
				} else
					$1->sc_name = NULL;
			}
			$$ = $1;
		}
		| NOTIFY namelist SM = {
			if ($2 != NULL)
				$1->sc_args = expand($2, E_VARS);
			$$ = $1;
		}
		| EXCEPT namelist SM = {
			if ($2 != NULL)
				$1->sc_args = expand($2, E_ALL);
			$$ = $1;
		}
		| PATTERN namelist SM = {
			if ($2 != NULL)
				$1->sc_args = expand($2, E_VARS);
			$$ = $1;
		}
		| SPECIAL opt_namelist STRING SM = {
			if ($2 != NULL)
				$1->sc_args = expand($2, E_ALL);
			$1->sc_name = $3;
			$$ = $1;
		}
		;

options:	  /* VOID */ = {
			$$ = 0;
		}
		| options OPTION = {
			$$ |= $2;
		}
		;

opt_namelist:	  /* VOID */ = {
			$$ = NULL;
		}
		| namelist = {
			$$ = $1;
		}
		;

%%

int	yylineno = 1;
extern	FILE *fin;

int
yylex()
{
	static char yytext[INMAX];
	register int c;
	register char *cp1, *cp2;
	static char quotechars[] = "[]{}*?$";
	
again:
	switch (c = getc(fin)) {
	case EOF:  /* end of file */
		return(0);

	case '#':  /* start of comment */
		while ((c = getc(fin)) != EOF && c != '\n')
			;
		if (c == EOF)
			return(0);
	case '\n':
		yylineno++;
	case ' ':
	case '\t':  /* skip blanks */
		goto again;

	case '=':  /* EQUAL */
		return(EQUAL);

	case '(':  /* LP */
		return(LP);

	case ')':  /* RP */
		return(RP);

	case ';':  /* SM */
		return(SM);

	case '-':  /* -> */
		if ((c = getc(fin)) == '>')
			return(ARROW);
		ungetc(c, fin);
		c = '-';
		break;

	case '"':  /* STRING */
		cp1 = yytext;
		cp2 = &yytext[INMAX - 1];
		for (;;) {
			if (cp1 >= cp2) {
				yyerror("command string too long\n");
				break;
			}
			c = getc(fin);
			if (c == EOF || c == '"')
				break;
			if (c == '\\') {
				if ((c = getc(fin)) == EOF) {
					*cp1++ = '\\';
					break;
				}
			}
			if (c == '\n') {
				yylineno++;
				c = ' '; /* can't send '\n' */
			}
			*cp1++ = c;
		}
		if (c != '"')
			yyerror("missing closing '\"'\n");
		*cp1 = '\0';
		yylval.string = makestr(yytext);
		return(STRING);

	case ':':  /* : or :: */
		if ((c = getc(fin)) == ':')
			return(DCOLON);
		ungetc(c, fin);
		return(COLON);
	}
	cp1 = yytext;
	cp2 = &yytext[INMAX - 1];
	for (;;) {
		if (cp1 >= cp2) {
			yyerror("input line too long\n");
			break;
		}
		if (c == '\\') {
			if ((c = getc(fin)) != EOF) {
				if (any(c, quotechars))
					c |= QUOTE;
			} else {
				*cp1++ = '\\';
				break;
			}
		}
		*cp1++ = c;
		c = getc(fin);
		if (c == EOF || any(c, " \"'\t()=;:\n")) {
			ungetc(c, fin);
			break;
		}
	}
	*cp1 = '\0';
	if (yytext[0] == '-' && yytext[2] == '\0') {
		switch (yytext[1]) {
		case 'b':
			yylval.intval = COMPARE;
			return(OPTION);

		case 'R':
			yylval.intval = REMOVE;
			return(OPTION);

		case 'v':
			yylval.intval = VERIFY;
			return(OPTION);

		case 'w':
			yylval.intval = WHOLE;
			return(OPTION);

		case 'y':
			yylval.intval = YOUNGER;
			return(OPTION);

		case 'h':
			yylval.intval = FOLLOW;
			return(OPTION);

		case 'i':
			yylval.intval = IGNLNKS;
			return(OPTION);
		}
	}
	if (!strcmp(yytext, "install"))
		c = INSTALL;
	else if (!strcmp(yytext, "notify"))
		c = NOTIFY;
	else if (!strcmp(yytext, "except"))
		c = EXCEPT;
	else if (!strcmp(yytext, "except_pat"))
		c = PATTERN;
	else if (!strcmp(yytext, "special"))
		c = SPECIAL;
	else {
		yylval.string = makestr(yytext);
		return(NAME);
	}
	yylval.subcmd = makesubcmd(c);
	return(c);
}

int
any(c, str)
	register int c;
	register char *str;
{
	while (*str)
		if (c == *str++)
			return(1);
	return(0);
}

/*
 * Insert or append ARROW command to list of hosts to be updated.
 */
void
insert(label, files, hosts, subcmds)
	char *label;
	struct namelist *files, *hosts;
	struct subcmd *subcmds;
{
	register struct cmd *c, *prev, *nc;
	register struct namelist *h, *nexth;

	files = expand(files, E_VARS|E_SHELL);
	hosts = expand(hosts, E_ALL);
	for (h = hosts; h != NULL; nexth = h->n_next, free(h), h = nexth) {
		/*
		 * Search command list for an update to the same host.
		 */
		for (prev = NULL, c = cmds; c!=NULL; prev = c, c = c->c_next) {
			if (strcmp(c->c_name, h->n_name) == 0) {
				do {
					prev = c;
					c = c->c_next;
				} while (c != NULL &&
					strcmp(c->c_name, h->n_name) == 0);
				break;
			}
		}
		/*
		 * Insert new command to update host.
		 */
		nc = ALLOC(cmd);
		if (nc == NULL)
			fatal("ran out of memory\n");
		nc->c_type = ARROW;
		nc->c_name = h->n_name;
		nc->c_label = label;
		nc->c_files = files;
		nc->c_cmds = subcmds;
		nc->c_next = c;
		if (prev == NULL)
			cmds = nc;
		else
			prev->c_next = nc;
		/* update last_cmd if appending nc to cmds */
		if (c == NULL)
			last_cmd = nc;
	}
}

/*
 * Append DCOLON command to the end of the command list since these are always
 * executed in the order they appear in the distfile.
 */
void
append(label, files, stamp, subcmds)
	char *label;
	struct namelist *files;
	char *stamp;
	struct subcmd *subcmds;
{
	register struct cmd *c;

	c = ALLOC(cmd);
	if (c == NULL)
		fatal("ran out of memory\n");
	c->c_type = DCOLON;
	c->c_name = stamp;
	c->c_label = label;
	c->c_files = expand(files, E_ALL);
	c->c_cmds = subcmds;
	c->c_next = NULL;
	if (cmds == NULL)
		cmds = last_cmd = c;
	else {
		last_cmd->c_next = c;
		last_cmd = c;
	}
}

/*
 * Error printing routine in parser.
 */
void
yyerror(s)
	char *s;
{
	++nerrs;
	fflush(stdout);
	fprintf(stderr, "rdist: line %d: %s\n", yylineno, s);
}

/*
 * Return a copy of the string.
 */
static char *
makestr(str)
	char *str;
{
	register char *cp, *s;

	str = cp = malloc(strlen(s = str) + 1);
	if (cp == NULL)
		fatal("ran out of memory\n");
	while (*cp++ = *s++)
		;
	return(str);
}

/*
 * Allocate a namelist structure.
 */
struct namelist *
makenl(name)
	char *name;
{
	register struct namelist *nl;

	nl = ALLOC(namelist);
	if (nl == NULL)
		fatal("ran out of memory\n");
	nl->n_name = name;
	nl->n_next = NULL;
	return(nl);
}

/*
 * Make a sub command for lists of variables, commands, etc.
 */
struct subcmd *
makesubcmd(type)
	int type;
{
	register struct subcmd *sc;

	sc = ALLOC(subcmd);
	if (sc == NULL)
		fatal("ran out of memory\n");
	sc->sc_type = type;
	sc->sc_args = NULL;
	sc->sc_next = NULL;
	sc->sc_name = NULL;
	return(sc);
}