273 lines
6.9 KiB
C
273 lines
6.9 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)mkswapconf.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$Id: mkswapconf.c,v 1.14 1997/09/17 06:20:45 charnier Exp $";
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#endif /* not lint */
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/*
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* Build a swap configuration file.
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*/
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#include <err.h>
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#include <unistd.h>
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#include "config.h"
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#ifdef linux
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#include <sys/sysmacros.h>
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#endif
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#define ns(s) strdup(s)
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void initdevtable __P((void));
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void
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swapconf()
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{
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register struct file_list *fl;
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struct file_list *do_swap();
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fl = conf_list;
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while (fl) {
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if (fl->f_type != SYSTEMSPEC) {
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fl = fl->f_next;
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continue;
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}
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fl = do_swap(fl);
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}
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}
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struct file_list *
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do_swap(fl)
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register struct file_list *fl;
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{
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FILE *fp;
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char newswapname[80];
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char swapname[80];
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register struct file_list *swap;
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if (eq(fl->f_fn, "generic")) {
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fl = fl->f_next;
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return (fl->f_next);
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}
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(void) sprintf(swapname, "swap%s.c", fl->f_fn);
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(void) sprintf(newswapname, "swap%s.c.new", fl->f_fn);
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fp = fopen(path(newswapname), "w");
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if (fp == 0)
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err(1, "%s", path(newswapname));
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fprintf(fp, "#include <sys/param.h>\n");
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fprintf(fp, "#include <sys/conf.h>\n");
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fprintf(fp, "\n");
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/*
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* If there aren't any swap devices
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* specified, just return, the error
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* has already been noted.
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*/
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swap = fl->f_next;
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if (swap == 0 || swap->f_type != SWAPSPEC) {
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(void) unlink(path(newswapname));
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fclose(fp);
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return (swap);
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}
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fprintf(fp, "dev_t\trootdev = makedev(%d, 0x%08x);\t\t/* %s */\n",
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major(fl->f_rootdev), minor(fl->f_rootdev),
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devtoname(fl->f_rootdev));
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if (fl->f_dumpdev != NODEV) {
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fprintf(fp, "dev_t\tdumpdev = makedev(%d, 0x%08x);\t\t/* %s */\n",
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major(fl->f_dumpdev), minor(fl->f_dumpdev),
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devtoname(fl->f_dumpdev));
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} else {
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fprintf(fp, "dev_t\tdumpdev = NODEV;\t\t\t/* unconfigured */\n");
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}
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fprintf(fp, "\n");
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fprintf(fp, "void\nsetconf()\n{\n}\n");
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fclose(fp);
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moveifchanged(path(newswapname), path(swapname));
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return (swap);
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}
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static int devtablenotread = 1;
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static struct devdescription {
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char *dev_name;
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int dev_major;
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struct devdescription *dev_next;
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} *devtable;
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/*
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* Given a device name specification figure out:
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* major device number
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* partition
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* device name
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* unit number
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* This is a hack, but the system still thinks in
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* terms of major/minor instead of string names.
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*/
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dev_t
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nametodev(name, defunit, defslice, defpartition)
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char *name;
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int defunit;
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int defslice;
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char defpartition;
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{
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char *cp, partition;
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int unit, slice;
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register struct devdescription *dp;
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cp = name;
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if (cp == 0)
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errx(1, "internal error, nametodev");
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while (*cp && !isdigit(*cp))
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cp++;
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unit = *cp ? atoi(cp) : defunit;
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if (unit < 0 || unit > 31) {
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warnx(
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"%s: invalid device specification, unit out of range", name);
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unit = defunit; /* carry on more checking */
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}
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if (*cp) {
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*cp++ = '\0';
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while (*cp && isdigit(*cp))
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cp++;
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}
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slice = defslice;
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if (*cp == 's') {
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++cp;
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if (*cp) {
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slice = atoi(cp);
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if (slice < 0 || slice >= MAX_SLICES - 1) {
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warnx(
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"%s: invalid device specification, slice out of range",
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cp);
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slice = defslice;
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}
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if (slice != COMPATIBILITY_SLICE)
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slice++;
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*cp++ = '\0';
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while (*cp && isdigit(*cp))
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cp++;
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}
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}
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partition = *cp ? *cp : defpartition;
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if (partition < 'a' || partition > 'h') {
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warnx("%c: invalid device specification, bad partition", *cp);
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partition = defpartition; /* carry on */
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}
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if (devtablenotread)
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initdevtable();
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for (dp = devtable; dp; dp = dp->dev_next)
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if (eq(name, dp->dev_name))
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break;
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if (dp == 0) {
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warnx("%s: unknown device", name);
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return (NODEV);
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}
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return (makedev(dp->dev_major,
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dkmakeminor(unit, slice, partition - 'a')));
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}
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char *
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devtoname(dev)
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dev_t dev;
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{
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char buf[80];
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register struct devdescription *dp;
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int part;
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char partname[2];
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int slice;
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char slicename[32];
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if (devtablenotread)
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initdevtable();
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for (dp = devtable; dp; dp = dp->dev_next)
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if (major(dev) == dp->dev_major)
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break;
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if (dp == 0)
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dp = devtable;
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part = dkpart(dev);
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slice = dkslice(dev);
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slicename[0] = partname[0] = '\0';
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if (slice != WHOLE_DISK_SLICE || part != RAW_PART) {
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partname[0] = 'a' + part;
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partname[1] = '\0';
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if (slice != COMPATIBILITY_SLICE)
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sprintf(slicename, "s%d", slice - 1);
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}
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(void) sprintf(buf, "%s%d%s%s", dp->dev_name,
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dkunit(dev), slicename, partname);
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return (ns(buf));
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}
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void
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initdevtable()
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{
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char linebuf[256];
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char buf[BUFSIZ];
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int maj;
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register struct devdescription **dp = &devtable;
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FILE *fp;
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(void) sprintf(buf, "../conf/devices.%s", machinename);
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fp = fopen(buf, "r");
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if (fp == NULL)
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errx(1, "can't open %s", buf);
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while(fgets(linebuf,256,fp)) {
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/*******************************\
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* Allow a comment *
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\*******************************/
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if(linebuf[0] == '#') continue;
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if (sscanf(linebuf, "%s\t%d\n", buf, &maj) == 2) {
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*dp = (struct devdescription *)malloc(sizeof (**dp));
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memset(*dp, 0, sizeof(**dp));
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(*dp)->dev_name = ns(buf);
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(*dp)->dev_major = maj;
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dp = &(*dp)->dev_next;
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} else {
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fprintf(stderr,"illegal line in devices file\n");
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break;
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}
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}
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*dp = 0;
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fclose(fp);
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devtablenotread = 0;
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}
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