usr.bin/config/mkswap.c

   1 /*      $NetBSD: mkswap.c,v 1.6 2008/12/28 01:23:46 christos Exp $      */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratories.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      from: @(#)mkswap.c      8.1 (Berkeley) 6/6/93
  41  */
  42
  43 #if HAVE_NBTOOL_CONFIG_H
  44 #include "nbtool_config.h"
  45 #endif
  46
  47 #include <sys/param.h>
  48 #include <errno.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <err.h>
  53 #include "defs.h"
  54 #include "sem.h"
  55
  56 static  char   *mkdevstr(dev_t);
  57 static  int     mkoneswap(struct config *);
  58
  59 /*
  60  * Make the various swap*.c files.  Nothing to do for generic swap.
  61  */
  62 int
  63 mkswap(void)
  64 {
  65         struct config *cf;
  66
  67         TAILQ_FOREACH(cf, &allcf, cf_next) {
  68                 if (mkoneswap(cf))
  69                         return (1);
  70         }
  71         return (0);
  72 }
  73
  74 static char *
  75 mkdevstr(dev_t d)
  76 {
  77         static char buf[32];
  78
  79         if (d == NODEV)
  80                 (void)snprintf(buf, sizeof(buf), "NODEV");
  81         else
  82                 (void)snprintf(buf, sizeof(buf), "makedev(%d, %d)",
  83                     major(d), minor(d));
  84         return buf;
  85 }
  86
  87 static int
  88 mkoneswap(struct config *cf)
  89 {
  90         struct nvlist *nv;
  91         FILE *fp;
  92         char fname[200], tname[200];
  93         char specinfo[200];
  94
  95         (void)snprintf(fname, sizeof(fname), "swap%s.c", cf->cf_name);
  96         (void)snprintf(tname, sizeof(tname), "swap%s.c.tmp", cf->cf_name);
  97         if ((fp = fopen(tname, "w")) == NULL) {
  98                 warn("cannot open %s", fname);
  99                 return (1);
 100         }
 101
 102         autogen_comment(fp, fname);
 103
 104         fputs("#include <sys/param.h>\n"
 105                 "#include <sys/conf.h>\n\n", fp);
 106         /*
 107          * Emit the root device.
 108          */
 109         nv = cf->cf_root;
 110         if (cf->cf_root->nv_str == s_qmark)
 111                 strlcpy(specinfo, "NULL", sizeof(specinfo));
 112         else
 113                 snprintf(specinfo, sizeof(specinfo), "\"%s\"",
 114                     cf->cf_root->nv_str);
 115         fprintf(fp, "const char *rootspec = %s;\n", specinfo);
 116         fprintf(fp, "dev_t\trootdev = %s;\t/* %s */\n\n",
 117                 mkdevstr(nv->nv_num),
 118                 nv->nv_str == s_qmark ? "wildcarded" : nv->nv_str);
 119
 120         /*
 121          * Emit the dump device.
 122          */
 123         nv = cf->cf_dump;
 124         if (cf->cf_dump == NULL)
 125                 strlcpy(specinfo, "NULL", sizeof(specinfo));
 126         else
 127                 snprintf(specinfo, sizeof(specinfo), "\"%s\"", cf->cf_dump->nv_str);
 128         fprintf(fp, "const char *dumpspec = %s;\n", specinfo);
 129         fprintf(fp, "dev_t\tdumpdev = %s;\t/* %s */\n\n",
 130                 nv ? mkdevstr(nv->nv_num) : "NODEV",
 131                 nv ? nv->nv_str : "unspecified");
 132
 133         /*
 134          * Emit the root file system.
 135          */
 136         fprintf(fp, "const char *rootfstype = \"%s\";\n",
 137                 cf->cf_fstype ? cf->cf_fstype : "?");
 138
 139         fflush(fp);
 140         if (ferror(fp))
 141                 goto wrerror;
 142
 143         if (fclose(fp)) {
 144                 fp = NULL;
 145                 goto wrerror;
 146         }
 147         if (moveifchanged(tname, fname) != 0) {
 148                 warn("error renaming %s", fname);
 149                 return (1);
 150         }
 151         return (0);
 152
 153  wrerror:
 154         warn("error writing %s", fname);
 155         if (fp != NULL)
 156                 (void)fclose(fp);
 157 #if 0
 158         (void)unlink(fname);
 159 #endif
 160         return (1);
 161 }