/*-
 * 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.
 *
 * $FreeBSD: src/sbin/kldstat/kldstat.c,v 1.20 2007/10/22 04:12:57 jb Exp $
 */

#include <err.h>
#include <libutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/module.h>
#include <sys/linker.h>

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

static int humanize = 0;
static int verbose = 0;


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

    stat.version = sizeof(struct module_stat);
    if (modstat(modid, &stat) < 0)
        warn("can't stat module id %d", modid);
    else
        printf("\t\t%2d %s\n", stat.id, stat.name);
}

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

    stat.version = sizeof(struct kld_file_stat);
    if (kldstat(fileid, &stat) < 0) {
        warn("can't stat file id %d", fileid);
    } else {
        if (humanize) {
            humanize_number(buf, sizeof(buf), stat.size, "",
                            HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE);
            printf("%2d %4d %*p %5s %s",
                   stat.id, stat.refs, POINTER_WIDTH, stat.address,
                   buf, stat.name);
        } else {
            printf("%2d %4d %*p %8zx %s",
                   stat.id, stat.refs, POINTER_WIDTH, stat.address,
                   stat.size, stat.name);
        }
    }

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

static void __dead2
usage(void)
{
    fprintf(stderr, "usage: kldstat [-hv] [-i id] [-n filename]\n");
    fprintf(stderr, "       kldstat [-q] [-m modname]\n");
    exit(1);
}

int
main(int argc, char** argv)
{
    int c;
    int fileid = 0;
    int quiet = 0;
    char* filename = NULL;
    char* modname = NULL;
    char* p;

    while ((c = getopt(argc, argv, "hi:m:n:qv")) != -1) {
        switch (c) {
        case 'h':
            humanize = 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) {
        int modid;
        struct module_stat stat;

        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 {
            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)
            err(1, "can't find file %s", filename);
    }

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

    return 0;
}