cmd/zonecfg/zonecfg_grammar.y

	zonecfg_grammar.y revision 3f2f09c1efd66f6d2995998ea72c5df8c70c9a97
%{
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdio.h>

#include "zonecfg.h"

static cmd_t *cmd = NULL;       /* Command being processed */
static complex_property_ptr_t complex = NULL;
static list_property_ptr_t new_list = NULL, tmp_list, last,
    list[MAX_EQ_PROP_PAIRS];
static property_value_t property[MAX_EQ_PROP_PAIRS];

extern bool newline_terminated;
extern int num_prop_vals;       /* # of property values */

/* yacc externals */
extern int yydebug;
extern void yyerror(char *s);

%}

%union {
    int ival;
    char *strval;
    cmd_t *cmd;
    complex_property_ptr_t complex;
    list_property_ptr_t list;
}

%start commands

%token HELP CREATE EXPORT ADD DELETE REMOVE SELECT SET INFO CANCEL END VERIFY
%token COMMIT REVERT EXIT SEMICOLON TOKEN ZONENAME ZONEPATH AUTOBOOT POOL NET
%token FS IPD ATTR DEVICE RCTL SPECIAL RAW DIR OPTIONS TYPE ADDRESS PHYSICAL
%token NAME MATCH PRIV LIMIT ACTION VALUE EQUAL OPEN_SQ_BRACKET CLOSE_SQ_BRACKET
%token OPEN_PAREN CLOSE_PAREN COMMA DATASET LIMITPRIV BOOTARGS

%type <strval> TOKEN EQUAL OPEN_SQ_BRACKET CLOSE_SQ_BRACKET
    property_value OPEN_PAREN CLOSE_PAREN COMMA simple_prop_val
%type <complex> complex_piece complex_prop_val
%type <ival> resource_type NET FS IPD DEVICE RCTL ATTR
%type <ival> property_name SPECIAL RAW DIR OPTIONS TYPE ADDRESS PHYSICAL NAME
    MATCH ZONENAME ZONEPATH AUTOBOOT POOL LIMITPRIV BOOTARGS VALUE PRIV LIMIT
    ACTION
%type <cmd> command
%type <cmd> add_command ADD
%type <cmd> cancel_command CANCEL
%type <cmd> commit_command COMMIT
%type <cmd> create_command CREATE
%type <cmd> delete_command DELETE
%type <cmd> end_command END
%type <cmd> exit_command EXIT
%type <cmd> export_command EXPORT
%type <cmd> help_command HELP
%type <cmd> info_command INFO
%type <cmd> remove_command REMOVE
%type <cmd> revert_command REVERT
%type <cmd> select_command SELECT
%type <cmd> set_command SET
%type <cmd> verify_command VERIFY
%type <cmd> terminator

%%

commands: command terminator
    {
        if ($1 != NULL) {
            if ($1->cmd_handler != NULL)
                $1->cmd_handler($1);
            free_cmd($1);
            bzero(list, sizeof (list_property_t));
            num_prop_vals = 0;
        }
        return (0);
    }
    | command error terminator
    {
        if ($1 != NULL) {
            free_cmd($1);
            bzero(list, sizeof (list_property_t));
            num_prop_vals = 0;
        }
        if (YYRECOVERING())
            YYABORT;
        yyclearin;
        yyerrok;
    }
    | error terminator
    {
        if (YYRECOVERING())
            YYABORT;
        yyclearin;
        yyerrok;
    }
    | terminator
    {
        return (0);
    }

command: add_command
    | cancel_command
    | create_command
    | commit_command
    | delete_command
    | end_command
    | exit_command
    | export_command
    | help_command
    | info_command
    | remove_command
    | revert_command
    | select_command
    | set_command
    | verify_command

terminator: '\n'    { newline_terminated = TRUE; }
    |   ';' { newline_terminated = FALSE; }

add_command: ADD
    {
        short_usage(CMD_ADD);
        (void) fputs("\n", stderr);
        usage(FALSE, HELP_RES_PROPS);
        YYERROR;
    }
    | ADD TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &add_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }
    | ADD resource_type
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &add_func;
        $$->cmd_argc = 0;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 0;
    }
    | ADD property_name property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &add_func;
        $$->cmd_argc = 0;
        $$->cmd_prop_nv_pairs = 1;
        $$->cmd_prop_name[0] = $2;
        $$->cmd_property_ptr[0] = &property[0];
    }

cancel_command: CANCEL
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &cancel_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | CANCEL TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &cancel_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

create_command: CREATE
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &create_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | CREATE TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &create_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }
    | CREATE TOKEN TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &create_func;
        $$->cmd_argc = 2;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = $3;
        $$->cmd_argv[2] = NULL;
    }
    | CREATE TOKEN TOKEN TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &create_func;
        $$->cmd_argc = 3;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = $3;
        $$->cmd_argv[2] = $4;
        $$->cmd_argv[3] = NULL;
    }

commit_command: COMMIT
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &commit_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | COMMIT TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &commit_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

delete_command: DELETE
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &delete_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    |   DELETE TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &delete_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

end_command: END
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &end_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | END TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &end_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

exit_command: EXIT
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &exit_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | EXIT TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &exit_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

export_command: EXPORT
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &export_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | EXPORT TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &export_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }
    | EXPORT TOKEN TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &export_func;
        $$->cmd_argc = 2;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = $3;
        $$->cmd_argv[2] = NULL;
    }

help_command:   HELP
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &help_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    |   HELP TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &help_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

info_command:   INFO
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_UNKNOWN;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO TOKEN
    {
        short_usage(CMD_INFO);
        (void) fputs("\n", stderr);
        usage(FALSE, HELP_RES_PROPS);
        free($2);
        YYERROR;
    }
    |   INFO resource_type
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO ZONENAME
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_ZONENAME;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO ZONEPATH
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_ZONEPATH;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO AUTOBOOT
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_AUTOBOOT;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO POOL
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_POOL;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO LIMITPRIV
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_LIMITPRIV;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO BOOTARGS
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = RT_BOOTARGS;
        $$->cmd_prop_nv_pairs = 0;
    }
    |   INFO resource_type property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 1;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
    }
    |   INFO resource_type property_name EQUAL property_value property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 2;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
        $$->cmd_prop_name[1] = $6;
        $$->cmd_property_ptr[1] = &property[1];
    }
    |   INFO resource_type property_name EQUAL property_value property_name EQUAL property_value property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &info_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 3;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
        $$->cmd_prop_name[1] = $6;
        $$->cmd_property_ptr[1] = &property[1];
        $$->cmd_prop_name[2] = $9;
        $$->cmd_property_ptr[2] = &property[2];
    }

remove_command: REMOVE
    {
        short_usage(CMD_REMOVE);
        (void) fputs("\n", stderr);
        usage(FALSE, HELP_RES_PROPS);
        YYERROR;
    }
    | REMOVE resource_type
    {
        short_usage(CMD_REMOVE);
        YYERROR;
    }
    | REMOVE property_name property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &remove_func;
        $$->cmd_prop_nv_pairs = 1;
        $$->cmd_prop_name[0] = $2;
        $$->cmd_property_ptr[0] = &property[0];
    }
    | REMOVE resource_type property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &remove_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 1;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
    }
    | REMOVE resource_type property_name EQUAL property_value property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &remove_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 2;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
        $$->cmd_prop_name[1] = $6;
        $$->cmd_property_ptr[1] = &property[1];
    }
    | REMOVE resource_type property_name EQUAL property_value property_name EQUAL property_value property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &remove_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 3;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
        $$->cmd_prop_name[1] = $6;
        $$->cmd_property_ptr[1] = &property[1];
        $$->cmd_prop_name[2] = $9;
        $$->cmd_property_ptr[2] = &property[2];
    }

revert_command: REVERT
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &revert_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | REVERT TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &revert_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

select_command: SELECT
    {
        short_usage(CMD_SELECT);
        (void) fputs("\n", stderr);
        usage(FALSE, HELP_RES_PROPS);
        YYERROR;
    }
    | SELECT resource_type
    {
        short_usage(CMD_SELECT);
        YYERROR;
    }
    | SELECT resource_type property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &select_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 1;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
    }
    | SELECT resource_type property_name EQUAL property_value property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &select_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 2;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
        $$->cmd_prop_name[1] = $6;
        $$->cmd_property_ptr[1] = &property[1];
    }
    | SELECT resource_type property_name EQUAL property_value property_name EQUAL property_value property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &select_func;
        $$->cmd_res_type = $2;
        $$->cmd_prop_nv_pairs = 3;
        $$->cmd_prop_name[0] = $3;
        $$->cmd_property_ptr[0] = &property[0];
        $$->cmd_prop_name[1] = $6;
        $$->cmd_property_ptr[1] = &property[1];
        $$->cmd_prop_name[2] = $9;
        $$->cmd_property_ptr[2] = &property[2];
    }

set_command: SET
    {
        short_usage(CMD_SET);
        (void) fputs("\n", stderr);
        usage(FALSE, HELP_PROPS);
        YYERROR;
    }
    | SET property_name EQUAL OPEN_SQ_BRACKET CLOSE_SQ_BRACKET
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &set_func;
        $$->cmd_prop_nv_pairs = 0;
        $$->cmd_prop_name[0] = $2;
        property[0].pv_type = PROP_VAL_LIST;
        property[0].pv_list = NULL;
        $$->cmd_property_ptr[0] = &property[0];
    }
    | SET property_name EQUAL property_value
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &set_func;
        $$->cmd_prop_nv_pairs = 1;
        $$->cmd_prop_name[0] = $2;
        $$->cmd_property_ptr[0] = &property[0];
    }

verify_command: VERIFY
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &verify_func;
        $$->cmd_argc = 0;
        $$->cmd_argv[0] = NULL;
    }
    | VERIFY TOKEN
    {
        if (($$ = alloc_cmd()) == NULL)
            YYERROR;
        cmd = $$;
        $$->cmd_handler = &verify_func;
        $$->cmd_argc = 1;
        $$->cmd_argv[0] = $2;
        $$->cmd_argv[1] = NULL;
    }

resource_type: NET  { $$ = RT_NET; }
    | FS        { $$ = RT_FS; }
    | IPD       { $$ = RT_IPD; }
    | DEVICE    { $$ = RT_DEVICE; }
    | RCTL      { $$ = RT_RCTL; }
    | ATTR      { $$ = RT_ATTR; }
    | DATASET   { $$ = RT_DATASET; }

property_name: SPECIAL  { $$ = PT_SPECIAL; }
    | RAW       { $$ = PT_RAW; }
    | DIR       { $$ = PT_DIR; }
    | TYPE      { $$ = PT_TYPE; }
    | OPTIONS   { $$ = PT_OPTIONS; }
    | ZONENAME  { $$ = PT_ZONENAME; }
    | ZONEPATH  { $$ = PT_ZONEPATH; }
    | AUTOBOOT  { $$ = PT_AUTOBOOT; }
    | POOL      { $$ = PT_POOL; }
    | LIMITPRIV { $$ = PT_LIMITPRIV; }
    | BOOTARGS  { $$ = PT_BOOTARGS; }
    | ADDRESS   { $$ = PT_ADDRESS; }
    | PHYSICAL  { $$ = PT_PHYSICAL; }
    | NAME      { $$ = PT_NAME; }
    | VALUE     { $$ = PT_VALUE; }
    | MATCH     { $$ = PT_MATCH; }
    | PRIV      { $$ = PT_PRIV; }
    | LIMIT     { $$ = PT_LIMIT; }
    | ACTION    { $$ = PT_ACTION; }

/*
 * The grammar builds data structures from the bottom up.  Thus various
 * strings are lexed into TOKENs or commands or resource or property values.
 * Below is where the resource and property values are built up into more
 * complex data structures.
 *
 * There are three kinds of properties: simple (single valued), complex
 * (one or more name=value pairs) and list (concatenation of one or more
 * simple or complex properties).
 *
 * So the property structure has a type which is one of these, and the
 * corresponding _simple, _complex or _list is set to the corresponding
 * lower-level data structure.
 */

property_value: simple_prop_val
    {
        property[num_prop_vals].pv_type = PROP_VAL_SIMPLE;
        property[num_prop_vals].pv_simple = $1;
        if (list[num_prop_vals] != NULL) {
            free_outer_list(list[num_prop_vals]);
            list[num_prop_vals] = NULL;
        }
        num_prop_vals++;
    }
    | complex_prop_val
    {
        property[num_prop_vals].pv_type = PROP_VAL_COMPLEX;
        property[num_prop_vals].pv_complex = complex;
        if (list[num_prop_vals] != NULL) {
            free_outer_list(list[num_prop_vals]);
            list[num_prop_vals] = NULL;
        }
        num_prop_vals++;
    }
    | list_prop_val
    {
        property[num_prop_vals].pv_type = PROP_VAL_LIST;
        property[num_prop_vals].pv_list = list[num_prop_vals];
        num_prop_vals++;
    }

/*
 * One level lower, lists are made up of simple or complex values, so
 * simple_prop_val and complex_prop_val fill in a list structure and
 * insert it into the linked list which is built up.  And because
 * complex properties can have multiple name=value pairs, we keep
 * track of them in another linked list.
 *
 * The complex and list structures for the linked lists are allocated
 * below, and freed by recursive functions which are ultimately called
 * by free_cmd(), which is called from the top-most "commands" part of
 * the grammar.
 */

simple_prop_val: TOKEN
    {
        if ((new_list = alloc_list()) == NULL)
            YYERROR;
        new_list->lp_simple = $1;
        new_list->lp_complex = NULL;
        new_list->lp_next = NULL;
        if (list[num_prop_vals] == NULL) {
            list[num_prop_vals] = new_list;
        } else {
            for (tmp_list = list[num_prop_vals]; tmp_list != NULL;
                tmp_list = tmp_list->lp_next)
                last = tmp_list;
            last->lp_next = new_list;
        }
    }

complex_prop_val: OPEN_PAREN complex_piece CLOSE_PAREN
    {
        if ((new_list = alloc_list()) == NULL)
            YYERROR;
        new_list->lp_simple = NULL;
        new_list->lp_complex = complex;
        new_list->lp_next = NULL;
        if (list[num_prop_vals] == NULL) {
            list[num_prop_vals] = new_list;
        } else {
            for (tmp_list = list[num_prop_vals]; tmp_list != NULL;
                tmp_list = tmp_list->lp_next)
                last = tmp_list;
            last->lp_next = new_list;
        }
    }

complex_piece: property_name EQUAL TOKEN
    {
        if (($$ = alloc_complex()) == NULL)
            YYERROR;
        $$->cp_type = $1;
        $$->cp_value = $3;
        $$->cp_next = NULL;
        complex = $$;
    }
    | property_name EQUAL TOKEN COMMA complex_piece
    {
        if (($$ = alloc_complex()) == NULL)
            YYERROR;
        $$->cp_type = $1;
        $$->cp_value = $3;
        $$->cp_next = complex;
        complex = $$;
    }

list_piece: simple_prop_val
    | complex_prop_val
    | simple_prop_val COMMA list_piece
    | complex_prop_val COMMA list_piece

list_prop_val: OPEN_SQ_BRACKET list_piece CLOSE_SQ_BRACKET
%%