/*      $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);
}