/*-
 * Copyright (c) 2005, 2006 Marcel Moolenaar
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <sys/param.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libgeom.h>

struct retval {
        struct retval *retval;
        const char *param;
        char *value;
};

static struct retval *retval;
static int verbose;

static void
usage(void)
{
        fprintf(stdout, "usage: %s [-v] param[:len][=value] ...\n",
            getprogname());
        exit(1);
}

static int
parse(char *arg, char **param, char **value, int *len)
{
        char *e, *colon, *equal;

        if (*arg == '\0')
                return (EINVAL);

        colon = strchr(arg, ':');
        equal = strchr(arg, '=');
        if (colon == NULL && equal == NULL)
                return (EINVAL);
        if (colon == arg || equal == arg)
                return (EINVAL);
        if (colon != NULL && equal != NULL && equal < colon)
                return (EINVAL);

        if (colon != NULL)
                *colon++ = '\0';
        if (equal != NULL)
                *equal++ = '\0';

        *param = arg;
        if (colon != NULL) {
                /* Length specification. This parameter is RW. */
                if (*colon == '\0')
                        return (EINVAL);
                *len = strtol(colon, &e, 0);
                if (*e != '\0')
                        return (EINVAL);
                if (*len <= 0 || *len > PATH_MAX)
                        return (EINVAL);
                *value = calloc(*len, sizeof(char));
                if (*value == NULL)
                        return (ENOMEM);
                if (equal != NULL) {
                        if (strlen(equal) >= PATH_MAX)
                                return (ENOMEM);
                        strcpy(*value, equal);
                }
        } else {
                /* This parameter is RO. */
                *len = -1;
                if (*equal == '\0')
                        return (EINVAL);
                *value = equal;
        }

        return (0);
}

int
main(int argc, char *argv[])
{
        struct retval *rv;
        struct gctl_req *req;
        char *param, *value;
        const char *s;
        int c, len, parse_retval;

        req = gctl_get_handle();
        assert(req != NULL);

        while ((c = getopt(argc, argv, "v")) != -1) {
                switch (c) {
                case 'v':
                        verbose = 1;
                        break;
                case '?':
                default:
                        usage();
                        /* NOTREACHED */
                        break;
                }
        }

        for (; optind < argc; optind++) {
                parse_retval = parse(argv[optind], &param, &value, &len);
                if (parse_retval == 0) {
                        if (len > 0) {
                                rv = malloc(sizeof(struct retval));
                                assert(rv != NULL);
                                rv->param = param;
                                rv->value = value;
                                rv->retval = retval;
                                retval = rv;
                                gctl_rw_param(req, param, len, value);
                        } else
                                gctl_ro_param(req, param, -1, value);
                } else
                        warnc(parse_retval, "failed to parse argument (%s)",
                            argv[optind]);
        }

        if (verbose)
                gctl_dump(req, stdout);

        s = gctl_issue(req);
        if (s == NULL) {
                printf("PASS");
                while (retval != NULL) {
                        rv = retval->retval;
                        printf(" %s=%s", retval->param, retval->value);
                        free(retval->value);
                        free(retval);
                        retval = rv;
                }
                printf("\n");
        } else
                printf("FAIL %s\n", s);

        gctl_free(req);
        return (0);
}