/*      $NetBSD: mkswap.c,v 1.10 2015/09/03 13:53:36 uebayasi Exp $     */

/*
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Lawrence Berkeley Laboratories.
 *
 * 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.
 *
 *      from: @(#)mkswap.c      8.1 (Berkeley) 6/6/93
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
__RCSID("$NetBSD: mkswap.c,v 1.10 2015/09/03 13:53:36 uebayasi Exp $");

#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include "defs.h"
#include "sem.h"

static  char   *mkdevstr(dev_t);
static  int     mkoneswap(struct config *);

/*
 * Make the various swap*.c files.  Nothing to do for generic swap.
 */
int
mkswap(void)
{
        struct config *cf;

        TAILQ_FOREACH(cf, &allcf, cf_next) {
                if (mkoneswap(cf))
                        return (1);
        }
        return (0);
}

static char *
mkdevstr(dev_t d)
{
        static char buf[32];

        if (d == NODEV)
                (void)snprintf(buf, sizeof(buf), "NODEV");
        else
                (void)snprintf(buf, sizeof(buf), "makedev(%d, %d)",
                    major(d), minor(d));
        return buf;
}

static int
mkoneswap(struct config *cf)
{
        struct nvlist *nv;
        FILE *fp;
        char fname[200], tname[200];
        char specinfo[200];

        (void)snprintf(fname, sizeof(fname), "swap%s.c", cf->cf_name);
        (void)snprintf(tname, sizeof(tname), "swap%s.c.tmp", cf->cf_name);
        if ((fp = fopen(tname, "w")) == NULL) {
                warn("cannot open %s", fname);
                return (1);
        }

        autogen_comment(fp, fname);

        fputs("#include <sys/param.h>\n"
                "#include <sys/conf.h>\n\n", fp);
        /*
         * Emit the root device.
         */
        nv = cf->cf_root;
        if (cf->cf_root->nv_str == s_qmark)
                strlcpy(specinfo, "NULL", sizeof(specinfo));
        else
                snprintf(specinfo, sizeof(specinfo), "\"%s\"",
                    cf->cf_root->nv_str);
        fprintf(fp, "const char *rootspec = %s;\n", specinfo);
        fprintf(fp, "dev_t\trootdev = %s;\t/* %s */\n\n",
                mkdevstr((dev_t)nv->nv_num),
                nv->nv_str == s_qmark ? "wildcarded" : nv->nv_str);

        /*
         * Emit the dump device.
         */
        nv = cf->cf_dump;
        if (cf->cf_dump == NULL)
                strlcpy(specinfo, "NULL", sizeof(specinfo));
        else
                snprintf(specinfo, sizeof(specinfo), "\"%s\"", cf->cf_dump->nv_str);
        fprintf(fp, "const char *dumpspec = %s;\n", specinfo);
        fprintf(fp, "dev_t\tdumpdev = %s;\t/* %s */\n\n",
                nv ? mkdevstr((dev_t)nv->nv_num) : "NODEV",
                nv ? nv->nv_str : "unspecified");

        /*
         * Emit the root file system.
         */
        fprintf(fp, "const char *rootfstype = \"%s\";\n",
                cf->cf_fstype ? cf->cf_fstype : "?");

        fflush(fp);
        if (ferror(fp))
                goto wrerror;

        if (fclose(fp)) {
                fp = NULL;
                goto wrerror;
        }
        if (moveifchanged(tname, fname) != 0) {
                warn("error renaming %s", fname);
                return (1);
        }
        return (0);

 wrerror:
        warn("error writing %s", fname);
        if (fp != NULL)
                (void)fclose(fp);
#if 0
        (void)unlink(fname);
#endif
        return (1);
}