/*      $OpenBSD: distopt.c,v 1.14 2021/06/22 20:19:28 jmc 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 <stdlib.h>
#include <string.h>

#include "client.h"

/*
 * Dist Option functions
 */


/*
 * Distfile Option Information
 */
struct distoptinfo {
        opt_t           do_value;
        char           *do_name;
        char           *do_arg;
        size_t         arg_size;
} distoptinfo[] = {
        { DO_CHKNFS,            "chknfs",       NULL,           0},
        { DO_CHKREADONLY,       "chkreadonly",  NULL,           0},
        { DO_CHKSYM,            "chksym",       NULL,           0},
        { DO_COMPARE,           "compare",      NULL,           0},
        { DO_DEFGROUP,          "defgroup",     defgroup,       sizeof(defgroup) },
        { DO_DEFOWNER,          "defowner",     defowner,       sizeof(defowner) },
        { DO_FOLLOW,            "follow",       NULL,           0},
        { DO_HISTORY,           "history",      NULL,           0},
        { DO_IGNLNKS,           "ignlnks",      NULL,           0},
        { DO_NOCHKGROUP,        "nochkgroup",   NULL,           0},
        { DO_NOCHKMODE,         "nochkmode",    NULL,           0},
        { DO_NOCHKOWNER,        "nochkowner",   NULL,           0},
        { DO_NODESCEND,         "nodescend",    NULL,           0},
        { DO_NOEXEC,            "noexec",       NULL,           0},
        { DO_NUMCHKGROUP,       "numchkgroup",  NULL,           0},
        { DO_NUMCHKOWNER,       "numchkowner",  NULL,           0},
        { DO_QUIET,             "quiet",        NULL,           0},
        { DO_REMOVE,            "remove",       NULL,           0},
        { DO_SAVETARGETS,       "savetargets",  NULL,           0},
        { DO_SPARSE,            "sparse",       NULL,           0},
        { DO_UPDATEPERM,        "updateperm",   NULL,           0},
        { DO_VERIFY,            "verify",       NULL,           0},
        { DO_WHOLE,             "whole",        NULL,           0},
        { DO_YOUNGER,           "younger",      NULL,           0},
        { 0 },
};

/*
 * Get a Distfile Option entry named "name".
 */
static struct distoptinfo *
getdistopt(char *name, int *len)
{
        int i;

        for (i = 0; distoptinfo[i].do_name; ++i)
                if (strncasecmp(name, distoptinfo[i].do_name,
                                *len = strlen(distoptinfo[i].do_name)) == 0)
                        return(&distoptinfo[i]);

        return(NULL);
}

/*
 * Parse a dist option string.  Set option flags to optptr.
 * If doerrs is true, print out own error message.  Returns
 * 0 on success.
 */
int
parsedistopts(char *str, opt_t *optptr, int doerrs)
{
        char *string, *optstr;
        struct distoptinfo *distopt;
        int len;

        /* strtok() is destructive */
        string = xstrdup(str);

        for (optstr = strtok(string, ","); optstr;
             optstr = strtok(NULL, ",")) {
                /* Try Yes */
                if ((distopt = getdistopt(optstr, &len)) != NULL) {
                        FLAG_ON(*optptr, distopt->do_value);
                        if (distopt->do_arg && optstr[len] == '=')
                                (void) strlcpy(distopt->do_arg,
                                    &optstr[len + 1], distopt->arg_size);
                        continue;
                }

                /* Try No */
                if ((distopt = getdistopt(optstr+2, &len)) != NULL) {
                        FLAG_OFF(*optptr, distopt->do_value);
                        continue;
                }

                if (doerrs)
                        error("Dist option \"%s\" is not valid.", optstr);
        }

        if (string)
                (void) free(string);

        return(nerrs);
}

/*
 * Get a list of the Distfile Option Entries for each enabled 
 * value in "opts".
 */
char *
getondistoptlist(opt_t opts)
{
        int i;
        static char buf[1024];

        for (i = 0, buf[0] = CNULL; distoptinfo[i].do_name; ++i) {
                if (!IS_ON(opts, distoptinfo[i].do_value))
                        continue;

                if (buf[0] == CNULL)
                        (void) strlcpy(buf, distoptinfo[i].do_name, sizeof buf);
                else {
                        (void) strlcat(buf, ",", sizeof buf);
                        (void) strlcat(buf, distoptinfo[i].do_name, sizeof buf);
                }
                if (distoptinfo[i].do_arg) {
                        (void) strlcat(buf, "=", sizeof buf);
                        (void) strlcat(buf, distoptinfo[i].do_arg, sizeof buf);
                }
        }

        return(buf);
}