/*-
 * 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 <string.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;

        memset(&stat, 0, 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);
}