/*
 * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com>
 *
 * 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.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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 "hammer.h"

#include <fstab.h>

static __inline void hammer_parse_blkdevs(const char *blkdevs, int oflags);
static void __hammer_parse_blkdevs(const char *blkdevs, int oflags,
                int verify_volume, int verify_count);
static void sigalrm(int signo);
static void sigintr(int signo);
static void usage(int exit_code) __dead2;

int RecurseOpt;
int VerboseOpt;
int QuietOpt;
int TwoWayPipeOpt;
int TimeoutOpt;
int DelayOpt = 5;
char *SshPort;
int ForceYesOpt;
int CompressOpt;
int ForceOpt;
int RunningIoctl;
int DidInterrupt;
int BulkOpt;
int AllPFS;
uint64_t BandwidthOpt;
uint64_t SplitupOpt = 4ULL * 1024ULL * 1024ULL * 1024ULL;
uint64_t MemoryLimit = 1024LLU * 1024 * 1024;
const char *SplitupOptStr;
const char *CyclePath;

int
main(int ac, char **av)
{
        char *blkdevs = NULL;
        char *ptr;
        char *restrictcmd = NULL;
        int ch;

        while ((ch = getopt(ac, av,
                            "b:c:de:hf:i:m:p:qrt:v2yABC:FR:S:T:X")) != -1) {
                switch(ch) {
                case '2':
                        TwoWayPipeOpt = 1;
                        break;
                case 'y':
                        ForceYesOpt = 1;
                        break;
                case 'b':
                        BandwidthOpt = strtoull(optarg, &ptr, 0);
                        switch(*ptr) {
                        case 'g':
                        case 'G':
                                BandwidthOpt *= 1024;
                                /* fall through */
                        case 'm':
                        case 'M':
                                BandwidthOpt *= 1024;
                                /* fall through */
                        case 'k':
                        case 'K':
                                BandwidthOpt *= 1024;
                                break;
                        case '\0':
                                /* bytes per second if no suffix */
                                break;
                        default:
                                usage(1);
                                /* not reached */
                        }
                        break;
                case 'S':
                        SplitupOptStr = strdup(optarg);
                        SplitupOpt = strtoull(optarg, &ptr, 0);
                        switch(*ptr) {
                        case 'g':
                        case 'G':
                                SplitupOpt *= 1024;
                                /* fall through */
                        case 'm':
                        case 'M':
                                SplitupOpt *= 1024;
                                /* fall through */
                        case 'k':
                        case 'K':
                                SplitupOpt *= 1024;
                                break;
                        case '\0':
                                /* bytes per second if no suffix */
                                break;
                        default:
                                usage(1);
                                /* not reached */
                        }
                        break;
                case 'c':
                        CyclePath = optarg;
                        break;
                case 'd':
                        ++DebugOpt;
                        break;
                case 'e':
                        ScoreBoardFile = optarg;
                        break;
                case 'h':
                        usage(0);
                        /* not reached */
                case 'i':
                        DelayOpt = strtol(optarg, NULL, 0);
                        break;
                case 'm':
                        MemoryLimit = strtouq(optarg, &ptr, 0);
                        switch(*ptr) {
                        case 't':
                        case 'T':
                                MemoryLimit *= 1024;
                                /* fall through */
                        case 'g':
                        case 'G':
                                MemoryLimit *= 1024;
                                /* fall through */
                        case 'm':
                        case 'M':
                                MemoryLimit *= 1024;
                                /* fall through */
                        case 'k':
                        case 'K':
                                MemoryLimit *= 1024;
                                /* fall through */
                        default:
                                break;
                        }

                        /* minimum limit */
                        if (MemoryLimit < 1024 * 1024)
                                MemoryLimit = 1024 * 1024;
                        break;
                case 'p':
                        SshPort = optarg;
                        break;
                case 'r':
                        RecurseOpt = 1;
                        break;
                case 'f':
                        blkdevs = optarg;
                        break;
                case 't':
                        TimeoutOpt = strtol(optarg, NULL, 0);
                        break;
                case 'v':
                        if (QuietOpt > 0)
                                --QuietOpt;
                        else
                                ++VerboseOpt;
                        break;
                case 'q':
                        if (VerboseOpt > 0)
                                --VerboseOpt;
                        else
                                ++QuietOpt;
                        break;
                case 'A':
                        AllPFS = 1;
                        break;
                case 'B':
                        BulkOpt = 1;
                        break;
                case 'C':
                        if (hammer_parse_cache_size(optarg) == -1) {
                                usage(1);
                                /* not reached */
                        }
                        break;
                case 'F':
                        ForceOpt = 1;
                        break;
                case 'R':
                        if (restrictcmd == NULL)
                                restrictcmd = optarg;
                        break;
                case 'T':
                        if (RestrictTarget == NULL)
                                RestrictTarget = optarg;
                        break;
                case 'X':
                        CompressOpt = 1;
                        break;
                default:
                        usage(1);
                        /* not reached */
                }
        }
        ac -= optind;
        av += optind;
        if (ac < 1) {
                usage(1);
                /* not reached */
        }

        signal(SIGALRM, sigalrm);
        signal(SIGINT, sigintr);

        /*
         * Check command restriction (used by hammer ssh-remote).  Several
         * commands may be iterated with a comma.
         */
        if (restrictcmd) {
                char *elm, *dup;

                dup = ptr = strdup(restrictcmd);
                while ((elm = strsep(&ptr, ",")) != NULL) {
                        if (strcmp(av[0], elm) == 0)
                                break;
                }
                if (elm == NULL) {
                        errx(1, "hammer-remote: request does not match "
                                "restricted command");
                        /* not reached */
                }
                free(dup);
        }

        /*
         * Lookup the filesystem type
         */
        if (hammer_uuid_name_lookup(&Hammer_FSType, HAMMER_FSTYPE_STRING)) {
                errx(1, "uuids file does not have the DragonFly "
                        "HAMMER filesystem type");
                /* not reached */
        }

        /*
         * Parse commands
         */
        if (strcmp(av[0], "synctid") == 0) {
                hammer_cmd_synctid(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "namekey2") == 0) {
                int64_t key;
                int32_t crcx;
                int len;
                const char *aname = av[1];

                if (aname == NULL) {
                        usage(1);
                        /* not reached */
                }
                len = strlen(aname);
                key = (uint32_t)crc32(aname, len) & 0xFFFFFFFEU;

                switch(len) {
                default:
                        crcx = crc32(aname + 3, len - 5);
                        crcx = crcx ^ (crcx >> 6) ^ (crcx >> 12);
                        key |= (int64_t)(crcx & 0x3F) << 42;
                        /* fall through */
                case 5:
                case 4:
                        /* fall through */
                case 3:
                        key |= ((int64_t)(aname[2] & 0x1F) << 48);
                        /* fall through */
                case 2:
                        key |= ((int64_t)(aname[1] & 0x1F) << 53) |
                               ((int64_t)(aname[len-2] & 0x1F) << 37);
                        /* fall through */
                case 1:
                        key |= ((int64_t)(aname[0] & 0x1F) << 58) |
                               ((int64_t)(aname[len-1] & 0x1F) << 32);
                        /* fall through */
                case 0:
                        break;
                }
                if (key == 0)
                        key |= 0x100000000LL;
                printf("0x%016jx\n", (uintmax_t)key);
                exit(0);
        }
        if (strcmp(av[0], "namekey1") == 0) {
                int64_t key;

                if (av[1] == NULL) {
                        usage(1);
                        /* not reached */
                }
                key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
                if (key == 0)
                        key |= 0x100000000LL;
                printf("0x%016jx\n", (uintmax_t)key);
                exit(0);
        }
        if (strcmp(av[0], "namekey32") == 0) {
                int32_t key;

                if (av[1] == NULL) {
                        usage(1);
                        /* not reached */
                }
                key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
                if (key == 0)
                        ++key;
                printf("0x%08x\n", key);
                exit(0);
        }
        if (strcmp(av[0], "pfs-status") == 0) {
                hammer_cmd_pseudofs_status(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "pfs-master") == 0) {
                hammer_cmd_pseudofs_create(av + 1, ac - 1, 0);
                exit(0);
        }
        if (strcmp(av[0], "pfs-slave") == 0) {
                hammer_cmd_pseudofs_create(av + 1, ac - 1, 1);
                exit(0);
        }
        if (strcmp(av[0], "pfs-update") == 0) {
                hammer_cmd_pseudofs_update(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "pfs-upgrade") == 0) {
                hammer_cmd_pseudofs_upgrade(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "pfs-downgrade") == 0) {
                hammer_cmd_pseudofs_downgrade(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "pfs-destroy") == 0) {
                hammer_cmd_pseudofs_destroy(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "prune") == 0) {
                hammer_cmd_softprune(av + 1, ac - 1, 0);
                exit(0);
        }
        if (strcmp(av[0], "prune-everything") == 0) {
                hammer_cmd_softprune(av + 1, ac - 1, 1);
                exit(0);
        }
        if (strcmp(av[0], "config") == 0) {
                hammer_cmd_config(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "viconfig") == 0) {
                hammer_cmd_viconfig(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "cleanup") == 0) {
                hammer_cmd_cleanup(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "abort-cleanup") == 0) {
                hammer_cmd_abort_cleanup(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "info") == 0) {
                hammer_cmd_info(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "ssh-remote") == 0) {
                if (ac != 3) {
                        usage(1);
                        /* not reached */
                }
                hammer_cmd_sshremote(av[1], av[2]);
                exit(0);
        }
        if (strcmp(av[0], "snap") == 0) {
                hammer_cmd_snap(av + 1, ac - 1, 0, 1);
                exit(0);
        }
        if (strcmp(av[0], "snaplo") == 0) {
                hammer_cmd_snap(av + 1, ac - 1, 0, 0);
                exit(0);
        }
        if (strcmp(av[0], "snapq") == 0) {
                hammer_cmd_snap(av + 1, ac - 1, 1, 0);
                exit(0);
        }
        if (strcmp(av[0], "snapls") == 0) {
                hammer_cmd_snapls(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "snaprm") == 0) {
                hammer_cmd_snaprm(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "snapshot") == 0) {
                hammer_cmd_snapshot(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "bstats") == 0) {
                hammer_cmd_bstats(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "iostats") == 0) {
                hammer_cmd_iostats(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "stats") == 0) {
                hammer_cmd_stats(av + 1, ac - 1);
                exit(0);
        }

        if (strncmp(av[0], "history", 7) == 0) {
                hammer_cmd_history(av[0] + 7, av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "rebalance") == 0) {
                signal(SIGINT, sigalrm);
                hammer_cmd_rebalance(av + 1, ac - 1);
                exit(0);
        }
        if (strncmp(av[0], "reblock", 7) == 0) {
                signal(SIGINT, sigalrm);
                if (strcmp(av[0], "reblock") == 0)
                        hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_FLAGS);
                else if (strcmp(av[0], "reblock-btree") == 0)
                        hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_BTREE);
                else if (strcmp(av[0], "reblock-inodes") == 0)
                        hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_INODES);
                else if (strcmp(av[0], "reblock-dirs") == 0)
                        hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DIRS);
                else if (strcmp(av[0], "reblock-data") == 0)
                        hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DATA);
                else {
                        usage(1);
                        /* not reached */
                }
                exit(0);
        }
        if (strncmp(av[0], "mirror", 6) == 0) {
                if (strcmp(av[0], "mirror-read") == 0)
                        hammer_cmd_mirror_read(av + 1, ac - 1, 0);
                else if (strcmp(av[0], "mirror-read-stream") == 0)
                        hammer_cmd_mirror_read(av + 1, ac - 1, 1);
                else if (strcmp(av[0], "mirror-write") == 0)
                        hammer_cmd_mirror_write(av + 1, ac - 1);
                else if (strcmp(av[0], "mirror-copy") == 0)
                        hammer_cmd_mirror_copy(av + 1, ac - 1, 0);
                else if (strcmp(av[0], "mirror-stream") == 0)
                        hammer_cmd_mirror_copy(av + 1, ac - 1, 1);
                else if (strcmp(av[0], "mirror-dump") == 0)
                        hammer_cmd_mirror_dump(av + 1, ac - 1);
                else {
                        usage(1);
                        /* not reached */
                }
                exit(0);
        }
        if (strcmp(av[0], "dedup-simulate") == 0) {
                hammer_cmd_dedup_simulate(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "dedup") == 0) {
                hammer_cmd_dedup(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "version") == 0) {
                hammer_cmd_get_version(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "version-upgrade") == 0) {
                hammer_cmd_set_version(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "volume-add") == 0) {
                hammer_cmd_volume_add(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "volume-del") == 0) {
                hammer_cmd_volume_del(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "volume-list") == 0) {
                hammer_cmd_volume_list(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "volume-blkdevs") == 0) {
                hammer_cmd_volume_blkdevs(av + 1, ac - 1);
                exit(0);
        }

        if (strcmp(av[0], "show") == 0) {
                const char *arg = NULL;
                char *p, *dup;
                int filter = -1;
                int obfuscate = 0;
                int indent = 0;

                hammer_parse_blkdevs(blkdevs, O_RDONLY);
                if (ac > 3) {
                        errx(1, "Too many options specified");
                        /* not reached */
                }
                if (ac > 1)
                        arg = av[1];
                if (ac > 2) {
                        dup = ptr = strdup(av[2]);
                        while ((p = strsep(&ptr, ",")) != NULL) {
                                if (strcmp(p, "filter") == 0)
                                        filter = 1;
                                else if (strcmp(p, "nofilter") == 0)
                                        filter = 0;
                                else if (strcmp(p, "obfuscate") == 0)
                                        obfuscate = 1;
                                else if (strcmp(p, "indent") == 0)
                                        indent = 1;
                        }
                        free(dup);
                }
                hammer_cmd_show(arg, filter, obfuscate, indent);
                exit(0);
        }
        if (strcmp(av[0], "show-undo") == 0) {
                hammer_parse_blkdevs(blkdevs, O_RDONLY);
                hammer_cmd_show_undo();
                exit(0);
        }
        if (strcmp(av[0], "recover") == 0) {
                __hammer_parse_blkdevs(blkdevs, O_RDONLY, 0, 1);
                hammer_cmd_recover(av + 1, ac - 1);
                exit(0);
        }
        if (strcmp(av[0], "blockmap") == 0) {
                hammer_parse_blkdevs(blkdevs, O_RDONLY);
                hammer_cmd_blockmap();
                exit(0);
        }
        if (strcmp(av[0], "checkmap") == 0) {
                hammer_parse_blkdevs(blkdevs, O_RDONLY);
                hammer_cmd_checkmap();
                exit(0);
        }
        if (strcmp(av[0], "strip") == 0) {
                __hammer_parse_blkdevs(blkdevs, O_RDWR, 0, 0);
                hammer_cmd_strip();
                exit(0);
        }

        usage(1);
        /* not reached */
        return(0);
}

/*
 * Parse the device specification.
 *
 * Multi-volume hammer devices are colon-separated.  Each element
 * may be further expanded via /etc/devtab.  One may also specify
 * a single element which is expanded into multiple elements via
 * /etc/devtab.
 */
static
void
__hammer_parse_blkdevs(const char *blkdevs, int oflags, int verify_volume,
        int verify_count)
{
        volume_info_t volume = NULL;
        char *copy;
        char *volname;
        int vol_count = 0;

        if (blkdevs == NULL) {
                errx(1, "A -f blkdevs specification is required "
                        "for this command");
                /* not reached */
        }

        copy = strdup(blkdevs);
        while ((volname = copy) != NULL) {
                if ((copy = strchr(copy, ':')) != NULL)
                        *copy++ = 0;
                volname = getdevpath(volname, 0);
                if (strchr(volname, ':')) {
                        __hammer_parse_blkdevs(volname, oflags, verify_volume,
                                verify_count);
                } else {
                        volume = load_volume(volname, oflags, verify_volume);
                        assert(volume);
                        ++vol_count;
                }
                free(volname);
        }
        free(copy);

        assert(volume);
        if (verify_count) {
                if (vol_count != volume->ondisk->vol_count) {
                        errx(1, "Volume header says %d volumes, but %d specified.",
                                volume->ondisk->vol_count, vol_count);
                        /* not reached */
                }
                if (get_root_volume() == NULL) {
                        errx(1, "No root volume found");
                        /* not reached */
                }
        }
}

static __inline
void
hammer_parse_blkdevs(const char *blkdevs, int oflags)
{
        __hammer_parse_blkdevs(blkdevs, oflags, 1, 1);
}

static
void
sigalrm(int signo __unused)
{
        /* do nothing (interrupts HAMMER ioctl) */
}

static
void
sigintr(int signo __unused)
{
        if (RunningIoctl == 0)
                _exit(1);
        DidInterrupt = 1;
        /* do nothing (interrupts HAMMER ioctl) */
}

static
void
usage(int exit_code)
{
        fprintf(stderr,
                "hammer -h\n"
                "hammer [-2ABFqrvXy] [-b bandwidth] [-C cachesize[:readahead]] \n"
                "       [-R restrictcmd] [-T restrictpath] [-c cyclefile]\n"
                "       [-e scoreboardfile] [-f blkdevs] [-i delay] [-p ssh-port]\n"
                "       [-S splitsize] [-t seconds] [-m memlimit] command [argument ...]\n"
                "hammer synctid <filesystem> [quick]\n"
                "hammer bstats [interval]\n"
                "hammer iostats [interval]\n"
                "hammer stats [interval]\n"
                "hammer history[@offset[,len]] <file> ...\n"
                "hammer namekey1 <path>\n"
                "hammer namekey2 <path>\n"
                "hammer namekey32 <path>\n"
                "hammer cleanup [<filesystem> ...]\n"
                "hammer abort-cleanup\n"
                "hammer info [<dirpath> ...]\n"
                "hammer snapshot [<filesystem>] <snapshot-dir>\n"
                "hammer snapshot <filesystem> <snapshot-dir> [<note>]\n"
                "hammer prune <softlink-dir>\n"
                "hammer prune-everything <filesystem>\n"
                "hammer rebalance <filesystem> [saturation_percentage]\n"
                "hammer reblock[-btree|-inodes|-dirs|-data] "
                        "<filesystem> [fill_percentage]\n"
                "hammer pfs-status <dirpath> ...\n"
                "hammer pfs-master <dirpath> [options]\n"
                "hammer pfs-slave <dirpath> [options]\n"
                "hammer pfs-update <dirpath> [options]\n"
                "hammer pfs-upgrade <dirpath>\n"
                "hammer pfs-downgrade <dirpath>\n"
                "hammer pfs-destroy <dirpath>\n"
                "hammer mirror-read <filesystem> [begin-tid]\n"
                "hammer mirror-read-stream <filesystem> [begin-tid]\n"
                "hammer mirror-write <filesystem>\n"
                "hammer mirror-dump [header]\n"
                "hammer mirror-copy [[user@]host:]<filesystem>"
                                  " [[user@]host:]<filesystem>\n"
                "hammer mirror-stream [[user@]host:]<filesystem>"
                                    " [[user@]host:]<filesystem>\n"
                "hammer ssh-remote command filesystem\n"
                "hammer version <filesystem>\n"
                "hammer version-upgrade <filesystem> <version> [force]\n"
                "hammer volume-add <device> <filesystem>\n"
                "hammer volume-del <device> <filesystem>\n"
                "hammer volume-list <filesystem>\n"
                "hammer volume-blkdevs <filesystem>\n"
        );

        fprintf(stderr, "\nHAMMER utility version 3+ commands:\n");

        fprintf(stderr,
                "hammer config [<filesystem> [<configfile>]]\n"
                "hammer viconfig [<filesystem>]\n"
                "hammer snap <path> [<note>]\n"
                "hammer snaplo <path> [<note>]\n"
                "hammer snapq <dir> [<note>]\n"
                "hammer snaprm <path> ...\n"
                "hammer snaprm <transid> ...\n"
                "hammer snaprm <filesystem> <transid> ...\n"
                "hammer snapls [<path> ...]\n"
        );

        fprintf(stderr, "\nHAMMER utility version 4+ commands:\n");

        fprintf(stderr,
                "hammer -f blkdevs blockmap\n"
                "hammer -f blkdevs checkmap\n"
                "hammer -f blkdevs [-qqq] show [lo:objid]\n"
                "hammer -f blkdevs show-undo\n"
                "hammer -f blkdevs recover <target_dir> [full|quick]\n"
                "hammer -f blkdevs strip\n"
        );

        fprintf(stderr, "\nHAMMER utility version 5+ commands:\n");

        fprintf(stderr,
                "hammer dedup-simulate <filesystem>\n"
                "hammer dedup <filesystem>\n"
        );

        exit(exit_code);
}