freebsd-dev/usr.sbin/config/mkswapconf.c
Peter Wemm d8f19d9417 Make a little more effort to avoid touching certain generated files if
they were not changed.  This makes 'make depend' more useful.
1996-01-12 08:57:10 +00:00

264 lines
6.8 KiB
C

/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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. 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, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char sccsid[] = "@(#)mkswapconf.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
/*
* Build a swap configuration file.
*/
#include "config.h"
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <ctype.h>
#include <stdio.h>
swapconf()
{
register struct file_list *fl;
struct file_list *do_swap();
fl = conf_list;
while (fl) {
if (fl->f_type != SYSTEMSPEC) {
fl = fl->f_next;
continue;
}
fl = do_swap(fl);
}
}
struct file_list *
do_swap(fl)
register struct file_list *fl;
{
FILE *fp;
char newswapname[80];
char swapname[80];
register struct file_list *swap;
dev_t dev;
if (eq(fl->f_fn, "generic")) {
fl = fl->f_next;
return (fl->f_next);
}
(void) sprintf(swapname, "swap%s.c", fl->f_fn);
(void) sprintf(newswapname, "swap%s.c.new", fl->f_fn);
fp = fopen(path(newswapname), "w");
if (fp == 0) {
perror(path(newswapname));
exit(1);
}
fprintf(fp, "#include <sys/param.h>\n");
fprintf(fp, "#include <sys/conf.h>\n");
fprintf(fp, "\n");
/*
* If there aren't any swap devices
* specified, just return, the error
* has already been noted.
*/
swap = fl->f_next;
if (swap == 0 || swap->f_type != SWAPSPEC) {
(void) unlink(path(newswapname));
fclose(fp);
return (swap);
}
fprintf(fp, "dev_t\trootdev = makedev(%d, 0x%08x);\t\t/* %s */\n",
major(fl->f_rootdev), minor(fl->f_rootdev),
devtoname(fl->f_rootdev));
if (fl->f_dumpdev != NODEV) {
fprintf(fp, "dev_t\tdumpdev = makedev(%d, 0x%08x);\t\t/* %s */\n",
major(fl->f_dumpdev), minor(fl->f_dumpdev),
devtoname(fl->f_dumpdev));
} else {
fprintf(fp, "dev_t\tdumpdev = NODEV;\t\t\t/* unconfigured */\n");
}
fprintf(fp, "\n");
fprintf(fp, "void\nsetconf()\n{\n}\n");
fclose(fp);
moveifchanged(path(newswapname), path(swapname));
return (swap);
}
static int devtablenotread = 1;
static struct devdescription {
char *dev_name;
int dev_major;
struct devdescription *dev_next;
} *devtable;
/*
* Given a device name specification figure out:
* major device number
* partition
* device name
* unit number
* This is a hack, but the system still thinks in
* terms of major/minor instead of string names.
*/
dev_t
nametodev(name, defunit, defslice, defpartition)
char *name;
int defunit;
int defslice;
char defpartition;
{
char *cp, partition;
int unit, slice;
register struct devdescription *dp;
cp = name;
if (cp == 0) {
fprintf(stderr, "config: internal error, nametodev\n");
exit(1);
}
while (*cp && !isdigit(*cp))
cp++;
unit = *cp ? atoi(cp) : defunit;
if (unit < 0 || unit > 31) {
fprintf(stderr,
"config: %s: invalid device specification, unit out of range\n", name);
unit = defunit; /* carry on more checking */
}
if (*cp) {
*cp++ = '\0';
while (*cp && isdigit(*cp))
cp++;
}
slice = defslice;
if (*cp == 's') {
++cp;
if (*cp) {
slice = atoi(cp);
if (slice < 0 || slice >= MAX_SLICES - 1) {
fprintf(stderr,
"config: %s: invalid device specification, slice out of range\n", cp);
slice = defslice;
}
if (slice != COMPATIBILITY_SLICE)
slice++;
*cp++ = '\0';
while (*cp && isdigit(*cp))
cp++;
}
}
partition = *cp ? *cp : defpartition;
if (partition < 'a' || partition > 'h') {
fprintf(stderr,
"config: %c: invalid device specification, bad partition\n", *cp);
partition = defpartition; /* carry on */
}
if (devtablenotread)
initdevtable();
for (dp = devtable; dp; dp = dp->dev_next)
if (eq(name, dp->dev_name))
break;
if (dp == 0) {
fprintf(stderr, "config: %s: unknown device\n", name);
return (NODEV);
}
return (makedev(dp->dev_major,
dkmakeminor(unit, slice, partition - 'a')));
}
char *
devtoname(dev)
dev_t dev;
{
char buf[80];
register struct devdescription *dp;
int part;
char partname[2];
int slice;
char slicename[32];
if (devtablenotread)
initdevtable();
for (dp = devtable; dp; dp = dp->dev_next)
if (major(dev) == dp->dev_major)
break;
if (dp == 0)
dp = devtable;
part = dkpart(dev);
slice = dkslice(dev);
slicename[0] = partname[0] = '\0';
if (slice != WHOLE_DISK_SLICE || part != RAW_PART) {
partname[0] = 'a' + part;
partname[1] = '\0';
if (slice != COMPATIBILITY_SLICE)
sprintf(slicename, "s%d", slice - 1);
}
(void) sprintf(buf, "%s%d%s%s", dp->dev_name,
dkunit(dev), slicename, partname);
return (ns(buf));
}
initdevtable()
{
char linebuf[256];
char buf[BUFSIZ];
int maj;
register struct devdescription **dp = &devtable;
FILE *fp;
(void) sprintf(buf, "../conf/devices.%s", machinename);
fp = fopen(buf, "r");
if (fp == NULL) {
fprintf(stderr, "config: can't open %s\n", buf);
exit(1);
}
while(fgets(linebuf,256,fp)) {
/*******************************\
* Allow a comment *
\*******************************/
if(linebuf[0] == '#') continue;
if (sscanf(linebuf, "%s\t%d\n", buf, &maj) == 2) {
*dp = (struct devdescription *)malloc(sizeof (**dp));
memset(*dp, 0, sizeof(**dp));
(*dp)->dev_name = ns(buf);
(*dp)->dev_major = maj;
dp = &(*dp)->dev_next;
} else {
fprintf(stderr,"illegal line in devices file\n");
break;
}
}
*dp = 0;
fclose(fp);
devtablenotread = 0;
}