/* $NetBSD: ophandlers.c,v 1.13 2013/07/02 11:59:46 joerg Exp $ */

/* $NetBSD: ophandlers.c,v 1.13 2013/07/02 11:59:46 joerg Exp $ */

/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

#include <sys/types.h>
#include <sys/ioctl.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <machine/eeprom.h>
#include <machine/openpromio.h>

#include "defs.h"

extern char *path_openprom;
extern int eval;
extern int verbose;

static char err_str[BUFSIZE];

static void op_notsupp (const struct extabent *, struct opiocdesc *, char *);

/*
* There are several known fields that I either don't know how to
* deal with or require special treatment.
*/
static const struct extabent opextab[] = {
{ "security-password", op_notsupp },
{ "security-mode", op_notsupp },
{ "oem-logo", op_notsupp },
{ NULL, op_notsupp },
};

#define BARF(str1, str2) { \
snprintf(err_str, sizeof err_str, "%s: %s", (str1), (str2)); \
++eval; \
return (err_str); \
};

void
op_action(char *keyword, char *arg)
{
char *cp;

if ((cp = op_handler(keyword, arg)) != NULL)
warnx("%s", cp);
return;
}

int
check_for_openprom(void)
{
int fd, rv, optnode;

/* if we can't open it, obviously we can't use it. */
if ((fd = open(path_openprom, O_RDONLY)) < 0)
return (0);

/* check for the presence of OpenFirmware with OPIOCGETOPTNODE */
rv = ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode);
close (fd);

return (rv == 0);
}

char *
op_handler(char *keyword, char *arg)
{
struct opiocdesc opio;
const struct extabent *ex;
char opio_buf[BUFSIZE];
int fd, optnode;

if ((fd = open(path_openprom, arg ? O_RDWR : O_RDONLY, 0640)) < 0)
BARF(path_openprom, strerror(errno));

/* Check to see if it's a special-case keyword. */
for (ex = opextab; ex->ex_keyword != NULL; ++ex)
if (strcmp(ex->ex_keyword, keyword) == 0)
break;

if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) {
(void)close(fd);
BARF("OPIOCGETOPTNODE", strerror(errno));
}

memset(&opio_buf[0], 0, sizeof(opio_buf));
memset(&opio, 0, sizeof(opio));
opio.op_nodeid = optnode;
opio.op_name = keyword;
opio.op_namelen = strlen(opio.op_name);

if (arg) {
if (verbose) {
printf("old: ");

opio.op_buf = &opio_buf[0];
opio.op_buflen = sizeof(opio_buf);
if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) {
(void)close(fd);
BARF("OPIOCGET", strerror(errno));
}

if (opio.op_buflen <= 0) {
printf("nothing available for %s\n", keyword);
goto out;
}

if (ex->ex_keyword != NULL)
(*ex->ex_handler)(ex, &opio, NULL);
else
printf("%s\n", opio.op_buf);
}
out:
if (ex->ex_keyword != NULL)
(*ex->ex_handler)(ex, &opio, arg);
else {
opio.op_buf = arg;
opio.op_buflen = strlen(arg);
}

if (ioctl(fd, OPIOCSET, (char *)&opio) < 0) {
(void)close(fd);
BARF("invalid keyword", keyword);
}

if (verbose) {
printf("new: ");
if (ex->ex_keyword != NULL)
(*ex->ex_handler)(ex, &opio, NULL);
else
printf("%s\n", opio.op_buf);
}
} else {
opio.op_buf = &opio_buf[0];
opio.op_buflen = sizeof(opio_buf);
if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) {
(void)close(fd);
BARF("OPIOCGET", strerror(errno));
}

if (opio.op_buflen <= 0) {
(void)snprintf(err_str, sizeof err_str,
"nothing available for %s", keyword);
return (err_str);
}

if (ex->ex_keyword != NULL)
(*ex->ex_handler)(ex, &opio, NULL);
else
printf("%s=%s\n", keyword, opio.op_buf);
}

(void)close(fd);
return (NULL);
}

/* ARGSUSED */
static void
op_notsupp(const struct extabent *exent, struct opiocdesc *opiop, char *arg)
{

warnx("property `%s' not yet supported", exent->ex_keyword);
}

/*
* XXX: This code is quite ugly. You have been warned.
* (Really! This is the only way I could get it to work!)
*/
void
op_dump(void)
{
struct opiocdesc opio1, opio2;
const struct extabent *ex;
char buf1[BUFSIZE], buf2[BUFSIZE], buf3[BUFSIZE], buf4[BUFSIZE];
int fd, optnode;

if ((fd = open(path_openprom, O_RDONLY, 0640)) < 0)
err(1, "open: %s", path_openprom);

if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0)
err(1, "OPIOCGETOPTNODE");

memset(&opio1, 0, sizeof(opio1));

/* This will grab the first property name from OPIOCNEXTPROP. */
memset(buf1, 0, sizeof(buf1));
memset(buf2, 0, sizeof(buf2));

opio1.op_nodeid = opio2.op_nodeid = optnode;

opio1.op_name = buf1;
opio1.op_buf = buf2;

opio2.op_name = buf3;
opio2.op_buf = buf4;

/*
* For reference: opio1 is for obtaining the name. Pass the
* name of the last property read in op_name, and the next one
* will be returned in op_buf. To get the first name, pass
* an empty string. There are no more properties when an
* empty string is returned.
*
* opio2 is for obtaining the value associated with that name.
* For some crazy reason, it seems as if we need to do all
* of that gratuitious zapping and copying. *sigh*
*/
for (;;) {
opio1.op_namelen = strlen(opio1.op_name);
opio1.op_buflen = sizeof(buf2);

if (ioctl(fd, OPIOCNEXTPROP, (char *)&opio1) < 0)
err(1, "ioctl: OPIOCNEXTPROP");

/*
* The name of the property we wish to get the
* value for has been stored in the value field
* of opio1. If the length of the name is 0, there
* are no more properties left.
*/
strcpy(opio2.op_name, opio1.op_buf); /* XXX strcpy is safe */
opio2.op_namelen = strlen(opio2.op_name);

if (opio2.op_namelen == 0) {
(void)close(fd);
return;
}

memset(opio2.op_buf, 0, sizeof(buf4));
opio2.op_buflen = sizeof(buf4);

if (ioctl(fd, OPIOCGET, (char *)&opio2) < 0)
err(1, "ioctl: OPIOCGET");

for (ex = opextab; ex->ex_keyword != NULL; ++ex)
if (strcmp(ex->ex_keyword, opio2.op_name) == 0)
break;

if (ex->ex_keyword != NULL)
(*ex->ex_handler)(ex, &opio2, NULL);
else
printf("%s=%s\n", opio2.op_name, opio2.op_buf);

/*
* Place the name of the last read value back into
* opio1 so that we may obtain the next name.
*/
memset(opio1.op_name, 0, sizeof(buf1));
memset(opio1.op_buf, 0, sizeof(buf2));
strcpy(opio1.op_name, opio2.op_name); /* XXX strcpy is safe */
}
/* NOTREACHED */
}