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For open/openat, if the flags parameter does not contain O_CREAT, the
3rd (variadic) mode_t parameter is irrelevant.  Many developers in the past
have passed mode_t (0, 044, 0644, or such), which might lead future people
to copy this broken idiom, and perhaps even believe this parameter has some
meaning or implication or application. Delete them all.
This comes out of a conversation where tb@ noticed that a strange (but
intentional) pledge behaviour is to always knock-out high-bits from
mode_t on a number of system calls as a safety factor, and his bewilderment
that this appeared to be happening against valid modes (at least visually),
but no sorry, they are all irrelevant junk.  They could all be 0xdeafbeef.
ok millert

/*	$OpenBSD: optree.c,v 1.11 2021/10/24 21:24:18 deraadt Exp $	*/

/*
 * Copyright (c) 2007 Federico G. Schwindt <fgsch@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for
 * any purpose with or without fee is hereby granted, provided that
 * the above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
 * OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

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

#include <machine/openpromio.h>

#include "defs.h"

extern  char *path_openprom;

static void
op_print(struct opiocdesc *opio, int depth)
{
	char *p;
	int i, multi, special;
	uint32_t cell;

	opio->op_name[opio->op_namelen] = '\0';
	printf("%*s%s: ", depth * 4, " ", opio->op_name);
	if (opio->op_buflen > 0) {
		opio->op_buf[opio->op_buflen] = '\0';
		multi = special = 0;

		/*
		 * On macppc we have string-values properties that end
		 * with multiple NUL characters, and the serial number
		 * has them embedded within the string.
		 */
		if (opio->op_buf[0] != '\0') {
			for (i = 0; i < opio->op_buflen; i++) {
				p = &opio->op_buf[i];
				if (*p >= ' ' && *p <= '~')
					continue;
				if (*p == '\0') {
					if (i + 1 < opio->op_buflen)
						p++;
					if (*p >= ' ' && *p <= '~') {
						special = multi;
						continue;
					}
					if (*p == '\0') {
						multi = 1;
						continue;
					}
				}

				special = 1;
				break;
			}
		} else {
			if (opio->op_buflen > 1)
				special = 1;
		}

		if (special && strcmp(opio->op_name, "serial-number") != 0) {
			for (i = 0; opio->op_buflen - i >= sizeof(int);
			    i += sizeof(int)) {
				if (i)
					printf(".");
				cell = *(uint32_t *)&opio->op_buf[i];
				printf("%08x", betoh32(cell));
			}
			if (i < opio->op_buflen) {
				if (i)
					printf(".");
				for (; i < opio->op_buflen; i++) {
					printf("%02x",
					    *(u_char *)&opio->op_buf[i]);
				}
			}
		} else {
			for (i = 0; i < opio->op_buflen;
			    i += strlen(&opio->op_buf[i]) + 1) {
				if (i && strlen(&opio->op_buf[i]) == 0)
					continue;
				if (i)
					printf(" + ");
				printf("'%s'", &opio->op_buf[i]);
			}
		}
	} else if(opio->op_buflen < 0)
		printf("too large");
	printf("\n");
}

void
op_nodes(int fd, int node, int depth)
{
	char op_buf[BUFSIZE * 8];
	char op_name[BUFSIZE];
	struct opiocdesc opio;

	memset(op_name, 0, sizeof(op_name));
	opio.op_nodeid = node;
	opio.op_buf = op_buf;
	opio.op_name = op_name;

	if (!node) {
		if (ioctl(fd, OPIOCGETNEXT, &opio) == -1)
			err(1, "OPIOCGETNEXT");
		node = opio.op_nodeid;
	} else
		printf("\n%*s", depth * 4, " ");

	printf("Node 0x%x\n", node);

	for (;;) {
		opio.op_buflen = sizeof(op_buf);
		opio.op_namelen = sizeof(op_name);

		/* Get the next property. */
		if (ioctl(fd, OPIOCNEXTPROP, &opio) == -1)
			err(1, "OPIOCNEXTPROP");

		op_buf[opio.op_buflen] = '\0';
		(void)strlcpy(op_name, op_buf, sizeof(op_name));
		opio.op_namelen = strlen(op_name);

		/* If it's the last, punt. */
		if (opio.op_namelen == 0)
			break;

		bzero(op_buf, sizeof(op_buf));
		opio.op_buflen = sizeof(op_buf);

		/* And its value. */
		if (ioctl(fd, OPIOCGET, &opio) == -1) {
			if (errno != ENOMEM)
				err(1, "OPIOCGET");

			opio.op_buflen = -1;	/* for op_print */
		}

		op_print(&opio, depth + 1);
	}

	/* Get next child. */
	if (ioctl(fd, OPIOCGETCHILD, &opio) == -1)
		err(1, "OPIOCGETCHILD");
	if (opio.op_nodeid)
		op_nodes(fd, opio.op_nodeid, depth + 1);

	/* Get next node/sibling. */
	opio.op_nodeid = node;
	if (ioctl(fd, OPIOCGETNEXT, &opio) == -1)
		err(1, "OPIOCGETNEXT");
	if (opio.op_nodeid)
		op_nodes(fd, opio.op_nodeid, depth);
}

void
op_tree(void)
{
	int fd;

	if ((fd = open(path_openprom, O_RDONLY)) == -1)
		err(1, "open: %s", path_openprom);
	op_nodes(fd, 0, 0);
	(void)close(fd);
}