da12c6d2aa
Support slice numbers in device names. The syntax is `<driver name> [<unit number>] ['s' <slice number>] [<partition letter>]'. Only `['s' <slice number>]' is new here. The slice number defaults to 0 so that there is no change in the output from config if this new feature is not used. Replace some magic disk numbers by `dk' slice and label macros. mkswapconf.c: Improve the output formatting: Generate <> style includes. Print minor numbers in hex so that slice numbers are easy to see and edit. Print the rootdev and dumpdev names in comments like the swapdev names.
266 lines
6.9 KiB
C
266 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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static char sccsid[] = "@(#)mkswapconf.c 8.1 (Berkeley) 6/6/93";
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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 "config.h"
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <ctype.h>
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#include <stdio.h>
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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 swapname[80];
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register struct file_list *swap;
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dev_t dev;
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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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fp = fopen(path(swapname), "w");
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if (fp == 0) {
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perror(path(swapname));
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exit(1);
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}
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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(swapname));
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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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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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fprintf(fp, "\n");
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fprintf(fp, "struct\tswdevt swdevt[] = {\n");
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do {
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dev = swap->f_swapdev;
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fprintf(fp, "\t{ makedev(%d, 0x%08x),\t%d,\t%d },\t/* %s */\n",
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major(dev), minor(dev), swap->f_swapflag,
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swap->f_swapsize, swap->f_fn);
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swap = swap->f_next;
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} while (swap && swap->f_type == SWAPSPEC);
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fprintf(fp, "\t{ NODEV, 0, 0 },\t/* for NFS diskless */\n");
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fprintf(fp, "\t{ NODEV, 0, 0 }\n");
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fprintf(fp, "};\n");
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fclose(fp);
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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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fprintf(stderr, "config: internal error, nametodev\n");
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exit(1);
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}
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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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fprintf(stderr,
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"config: %s: invalid device specification, unit out of range\n", 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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fprintf(stderr,
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"config: %s: invalid device specification, slice out of range\n", 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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fprintf(stderr,
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"config: %c: invalid device specification, bad partition\n", *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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fprintf(stderr, "config: %s: unknown device\n", 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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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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fprintf(stderr, "config: can't open %s\n", buf);
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exit(1);
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}
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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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(*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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