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/* $OpenBSD: ukc.c,v 1.14 2007/06/28 00:52:37 ray Exp $ */
/*
* Copyright (c) 1999-2001 Mats O Jansson. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 rcsid[] = "$OpenBSD: ukc.c,v 1.14 2007/06/28 00:52:37 ray Exp $";
#endif
#include <sys/types.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <err.h>
#include <kvm.h>
#include <fcntl.h>
#include <limits.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define UKC_MAIN
#include "ukc.h"
#include "exec.h"
void init(void);
void usage(void);
int ukc_mod_kernel = 0;
static void
check_int(int idx, const char *name)
{
if (nl[idx].n_type == 0)
printf("WARNING this kernel doesn't support modification "
"of %s.\n", name);
}
int
ukc(char *file, char *outfile, int uflag, int force)
{
extern char *__progname;
int i;
kvm_t *kd;
char errbuf[_POSIX2_LINE_MAX];
int histlen = 0, ok = 1;
char history[1024], kversion[1024];
if (file == NULL) {
fprintf(stderr, "%s: no file specified\n", __progname);
usage();
}
loadkernel(file);
if (nlist(file, nl) == -1)
errx(1, "nlist: %s", file);
if (uflag) {
if ((kd = kvm_openfiles(NULL,NULL,NULL,O_RDONLY, errbuf)) == 0)
errx(1, "kvm_openfiles: %s", errbuf);
if (kvm_nlist(kd, knl) == -1)
errx(1, "kvm_nlist: %s", kvm_geterr(kd));
i = 0;
while (i < NLENTRIES) {
if (nl[i].n_type != knl[i].n_type ||
nl[i].n_desc != knl[i].n_desc ||
nl[i].n_value != knl[i].n_value)
ok = 0;
i++;
}
if (knl[I_HISTLEN].n_type != 0 && ok) {
if (kvm_read(kd, knl[I_HISTLEN].n_value, &histlen,
sizeof(histlen)) != sizeof(histlen))
warnx("cannot read %s: %s",
knl[I_HISTLEN].n_name,
kvm_geterr(kd));
}
if (knl[CA_HISTORY].n_type != 0 && ok) {
if (kvm_read(kd, knl[CA_HISTORY].n_value, history,
sizeof(history)) != sizeof(history))
warnx("cannot read %s: %s",
knl[CA_HISTORY].n_name,
kvm_geterr(kd));
}
if (knl[P_VERSION].n_type != 0 && ok) {
if (kvm_read(kd, knl[P_VERSION].n_value, kversion,
sizeof(kversion)) != sizeof(kversion))
warnx("cannot read %s: %s",
knl[P_VERSION].n_name,
kvm_geterr(kd));
}
}
printf("%s", adjust((caddr_t)nl[P_VERSION].n_value));
if (force == 0 && outfile == NULL)
printf("warning: no output file specified\n");
if (nl[IA_EXTRALOC].n_type == 0 || nl[I_NEXTRALOC].n_type == 0 ||
nl[I_UEXTRALOC].n_type == 0 || nl[I_HISTLEN].n_type == 0 ||
nl[CA_HISTORY].n_type == 0) {
printf("\
WARNING this kernel doesn't contain all information needed!\n\
WARNING the commands add and change might not work.\n");
oldkernel = 1;
}
if (nl[P_PDEVNAMES].n_type == 0 ||
nl[I_PDEVSIZE].n_type == 0 ||
nl[S_PDEVINIT].n_type == 0) {
printf("\
WARNING this kernel doesn't support pseudo devices.\n");
nopdev = 1;
}
check_int(I_BUFCACHEPCT, "BUFCACHEPERCENT");
check_int(I_NKMEMPG, "NKMEMPAGES");
check_int(I_SHMSEG, "SHMSEG");
check_int(I_SHMMAXPGS, "SHMMAXPGS");
init();
if (uflag) {
if (ok) {
if (strcmp(adjust((caddr_t)nl[P_VERSION].n_value),
kversion) != 0)
ok = 1;
}
if (!ok) {
printf("WARNING kernel mismatch. -u ignored.\n");
printf("WARNING the running kernel version:\n");
printf("%s", kversion);
} else
process_history(histlen, history);
}
if (config()) {
if (force == 0 && outfile == NULL) {
fprintf(stderr, "not forced\n");
return (1);
}
if (outfile == NULL)
outfile = file;
if (ukc_mod_kernel == 0) {
fprintf(stderr, "Kernel not modified\n");
return (1);
} else {
printf ("Saving modified kernel.\n");
savekernel(outfile);
}
}
return(0);
}
void
init(void)
{
int i = 0, fd;
struct cfdata *cd;
short *ln;
int *p;
#ifdef NOTDEF
struct winsize w;
#endif
cd = get_cfdata(0); /* get first item */
while (cd->cf_attach != 0) {
maxdev = i;
totdev = i;
ln = get_locnamp(cd->cf_locnames);
while (*ln != -1) {
if (*ln > maxlocnames)
maxlocnames = *ln;
ln++;
}
i++;
cd++;
}
while (cd->cf_attach == 0) {
totdev = i;
i++;
cd++;
}
totdev = totdev - 1;
if (nopdev == 0) {
p = (int *)adjust((caddr_t)nl[I_PDEVSIZE].n_value);
maxpseudo = *p;
}
if ((fd = open("/dev/tty", O_RDWR)) < 0)
fd = 2;
#ifdef NOTDEF
if (ioctl(fd, TIOCGWINSZ, &w) == 0)
printf("row %d col %d\n", w.ws_row, w.ws_col);
if ((s = getenv("LINES")) != NULL)
sc_height = atoi(s);
else
sc_height = tgetnum("li");
if (sc_height <= 0)
sc_height = 24;
if ((s = getenv("COLUMNS")) != NULL)
sc_width = atoi(s);
else
sc_width = tgetnum("co");
if (sc_width <= 0)
sc_width = 80;
#endif
}
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