/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 1997 Doug Rabson
 * 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 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 AUTHOR 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/param.h>
#include <sys/module.h>
#include <sys/linker.h>

#include <err.h>
#include <libutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>

#define	PTR_WIDTH ((int)(sizeof(void *) * 2 + 2))

static void printmod(int);
static void printfile(int, int, int);
static void usage(void) __dead2;

static int showdata = 0;

static void
printmod(int modid)
{
	struct module_stat stat;

	bzero(&stat, sizeof(stat));
	stat.version = sizeof(struct module_stat);
	if (modstat(modid, &stat) < 0) {
		warn("can't stat module id %d", modid);
		return;
	}
	if (showdata) {
		printf("\t\t%3d %s (%d, %u, 0x%lx)\n", stat.id,
		    stat.name, stat.data.intval, stat.data.uintval,
		    stat.data.ulongval);
	} else
		printf("\t\t%3d %s\n", stat.id, stat.name);
}

static void
printfile(int fileid, int verbose, int humanized)
{
	struct kld_file_stat stat;
	int modid;
	char buf[5];

	stat.version = sizeof(struct kld_file_stat);
	if (kldstat(fileid, &stat) < 0)
		err(1, "can't stat file id %d", fileid);
	if (humanized) {
		humanize_number(buf, sizeof(buf), stat.size,
		    "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE);

		printf("%2d %4d %*p %5s %s",
		    stat.id, stat.refs, PTR_WIDTH, stat.address,
		    buf, stat.name);
	} else {
		printf("%2d %4d %*p %8zx %s",
		    stat.id, stat.refs, PTR_WIDTH, stat.address,
		    stat.size, stat.name);
	}

	if (verbose) {
		printf(" (%s)\n", stat.pathname);
		printf("\tContains modules:\n");
		printf("\t\t Id Name\n");
		for (modid = kldfirstmod(fileid); modid > 0; modid = modfnext(modid))
			printmod(modid);
	} else
		printf("\n");
}

static void __dead2
usage(void)
{
	fprintf(stderr, "usage: %1$s [-dhqv] [-i id] [-n filename]\n"
	    "       %1$s [-dq] [-m modname]\n", getprogname());
	exit(1);
}

int
main(int argc, char *argv[])
{
	struct module_stat stat;
	int humanized = 0;
	int verbose = 0;
	int fileid = 0;
	int quiet = 0;
	int c, modid;
	char *filename = NULL;
	char *modname = NULL;
	char *p;

	while ((c = getopt(argc, argv, "dhi:m:n:qv")) != -1) {
		switch (c) {
		case 'd':
			showdata = 1;
			break;
		case 'h':
			humanized = 1;
			break;
		case 'i':
			fileid = (int)strtoul(optarg, &p, 10);
			if (*p != '\0')
				usage();
			break;
		case 'm':
			modname = optarg;
			break;
		case 'n':
			filename = optarg;
			break;
		case 'q':
			quiet = 1;
			break;
		case 'v':
			verbose = 1;
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (argc != 0)
		usage();

	if (modname != NULL) {
		if ((modid = modfind(modname)) < 0) {
			if (!quiet)
				warn("can't find module %s", modname);
			return (1);
		} else if (quiet)
			return (0);

		stat.version = sizeof(struct module_stat);
		if (modstat(modid, &stat) < 0)
			warn("can't stat module id %d", modid);
		else {
			if (showdata) {
				printf("Id  Refs Name data..(int, uint, ulong)\n");
				printf("%3d %4d %s (%d, %u, 0x%lx)\n",
				    stat.id, stat.refs, stat.name,
				    stat.data.intval, stat.data.uintval,
				    stat.data.ulongval);
			} else {
				printf("Id  Refs Name\n");
				printf("%3d %4d %s\n", stat.id, stat.refs,
				    stat.name);
			}
		}

		return (0);
	}

	if (filename != NULL) {
		if ((fileid = kldfind(filename)) < 0) {
			if (!quiet)
				warn("can't find file %s", filename);
			return (1);
		} else if (quiet)
			return (0);
	}

	if (humanized) {
		printf("Id Refs Address%*c %5s Name\n", PTR_WIDTH - 7,
		    ' ', "Size");
	} else {
		printf("Id Refs Address%*c %8s Name\n", PTR_WIDTH - 7,
		    ' ', "Size");
	}
	if (fileid != 0)
		printfile(fileid, verbose, humanized);
	else
		for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid))
			printfile(fileid, verbose, humanized);

	return (0);
}