NetBSD/usr.sbin/config/mkswap.c

165 lines
4.8 KiB
C

/* $NetBSD: mkswap.c,v 1.16 2003/08/07 11:25:16 agc 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
*/
#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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) {
(void)fprintf(stderr, "config: cannot write %s: %s\n",
fname, strerror(errno));
return (1);
}
if (fputs("\
#include <sys/param.h>\n\
#include <sys/conf.h>\n\n", fp) < 0)
goto wrerror;
/*
* 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);
if (fprintf(fp, "const char *rootspec = %s;\n", specinfo) < 0)
goto wrerror;
if (fprintf(fp, "dev_t\trootdev = %s;\t/* %s */\n\n",
mkdevstr(nv->nv_int),
nv->nv_str == s_qmark ? "wildcarded" : nv->nv_str) < 0)
goto wrerror;
/*
* 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);
if (fprintf(fp, "const char *dumpspec = %s;\n", specinfo) < 0)
goto wrerror;
if (fprintf(fp, "dev_t\tdumpdev = %s;\t/* %s */\n\n",
nv ? mkdevstr(nv->nv_int) : "NODEV",
nv ? nv->nv_str : "unspecified") < 0)
goto wrerror;
/*
* Emit the root file system.
*/
if (cf->cf_fstype == NULL)
strlcpy(specinfo, "NULL", sizeof(specinfo));
else {
snprintf(specinfo, sizeof(specinfo), "%s_mountroot",
cf->cf_fstype);
if (fprintf(fp, "int %s(void);\n", specinfo) < 0)
goto wrerror;
}
if (fprintf(fp, "int (*mountroot)(void) = %s;\n", specinfo) < 0)
goto wrerror;
if (fclose(fp)) {
fp = NULL;
goto wrerror;
}
if (moveifchanged(tname, fname) != 0) {
(void)fprintf(stderr, "config: error renaming %s: %s\n",
fname, strerror(errno));
return (1);
}
return (0);
wrerror:
(void)fprintf(stderr, "config: error writing %s: %s\n",
fname, strerror(errno));
if (fp != NULL)
(void)fclose(fp);
/* (void)unlink(fname); */
return (1);
}