Libc-498.1.5.tar.gz

[apple/libc.git] / gen / asl_legacy1.c

/*
 * Copyright (c) 2007-2008 Apple Inc.  All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 2007 Apple Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#include <asl_core.h>
#include <asl_legacy1.h>
#include <asl_private.h>
#include <stdlib.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include <string.h>
#include <membership.h>
#include <mach/mach.h>
#include <sys/syslimits.h>
#include <sys/types.h>
#include <time.h>
#include <sys/mman.h>

#define forever for(;;)

#define FILE_MODE 0600

#define DB_RECORD_LEN 80

#define DB_HEADER_COOKIE_OFFSET 0
#define DB_HEADER_VERS_OFFSET 12

#define DB_TYPE_EMPTY   0
#define DB_TYPE_HEADER  1
#define DB_TYPE_MESSAGE 2
#define DB_TYPE_KVLIST  3
#define DB_TYPE_STRING  4
#define DB_TYPE_STRCONT 5

/*
 * Magic Cookie for database files.
 * MAXIMUM 12 CHARS! (DB_HEADER_VERS_OFFSET)
 */
#define ASL_DB_COOKIE "ASL DB"
#define ASL_DB_COOKIE_LEN 6

#define ASL_INDEX_NULL 0xffffffff

#define DB_HLEN_EMPTY    0
#define DB_HLEN_HEADER  13
#define DB_HLEN_MESSAGE 13
#define DB_HLEN_KVLIST   9
#define DB_HLEN_STRING  25
#define DB_HLEN_STRCONT  5

#define MSG_OFF_KEY_TYPE 0
#define MSG_OFF_KEY_NEXT 1
#define MSG_OFF_KEY_ID 5
#define MSG_OFF_KEY_RUID 13
#define MSG_OFF_KEY_RGID 17
#define MSG_OFF_KEY_TIME 21
#define MSG_OFF_KEY_HOST 29
#define MSG_OFF_KEY_SENDER 37
#define MSG_OFF_KEY_FACILITY 45
#define MSG_OFF_KEY_LEVEL 53
#define MSG_OFF_KEY_PID 57
#define MSG_OFF_KEY_UID 61
#define MSG_OFF_KEY_GID 65
#define MSG_OFF_KEY_MSG 69
#define MSG_OFF_KEY_FLAGS 77

extern time_t asl_parse_time(const char *str);
extern int asl_msg_cmp(asl_msg_t *a, asl_msg_t *b);

#define asl_msg_list_t asl_search_result_t

#define PMSG_SEL_TIME           0x0001
#define PMSG_SEL_HOST           0x0002
#define PMSG_SEL_SENDER         0x0004
#define PMSG_SEL_FACILITY       0x0008
#define PMSG_SEL_MESSAGE        0x0010
#define PMSG_SEL_LEVEL          0x0020
#define PMSG_SEL_PID            0x0040
#define PMSG_SEL_UID            0x0080
#define PMSG_SEL_GID            0x0100
#define PMSG_SEL_RUID           0x0200
#define PMSG_SEL_RGID           0x0400

#define PMSG_FETCH_ALL 0
#define PMSG_FETCH_STD 1
#define PMSG_FETCH_KV  2

#define Q_NULL 100001
#define Q_FAST 100002
#define Q_SLOW 100003
#define Q_FAIL 100004

typedef struct
{
        uint16_t kselect;
        uint16_t vselect;
        uint64_t msgid;
        uint64_t time;
        uint64_t host;
        uint64_t sender;
        uint64_t facility;
        uint64_t message;
        uint32_t level;
        uint32_t pid;
        int32_t uid;
        int32_t gid;
        int32_t ruid;
        int32_t rgid;
        uint32_t next;
        uint32_t kvcount;
        uint64_t *kvlist;
} pmsg_t;

static uint64_t
_asl_htonq(uint64_t n)
{
#ifdef __BIG_ENDIAN__
        return n;
#else
        u_int32_t t;
        union
        {
                u_int64_t q;
                u_int32_t l[2];
        } x;

        x.q = n;
        t = x.l[0];
        x.l[0] = htonl(x.l[1]);
        x.l[1] = htonl(t);

        return x.q;
#endif
}

static uint64_t
_asl_ntohq(uint64_t n)
{
#ifdef __BIG_ENDIAN__
        return n;
#else
        u_int32_t t;
        union
        {
                u_int64_t q;
                u_int32_t l[2];
        } x;

        x.q = n;
        t = x.l[0];
        x.l[0] = ntohl(x.l[1]);
        x.l[1] = ntohl(t);

        return x.q;
#endif
}

static uint16_t
_asl_get_16(char *h)
{
        uint16_t x;

        memcpy(&x, h, 2);
        return ntohs(x);
}

static uint32_t
_asl_get_32(char *h)
{
        uint32_t x;

        memcpy(&x, h, 4);
        return ntohl(x);
}

static uint64_t
_asl_get_64(char *h)
{
        uint64_t x;

        memcpy(&x, h, 8);
        return _asl_ntohq(x);
}

#define header_get_next(h)              _asl_get_32(h +  1)
#define header_get_id(h)                _asl_get_64(h +  5)
#define header_get_hash(h)              _asl_get_32(h + 17)

/*
 * callback for sorting slotlist
 * primary sort is by xid
 * secondary sort is by slot, which happens when xid is 0
 * this allows us to quickly find xids (using binary search on the xid key)
 * it's also used to find slots quickly from record_chain_free()
 */
static int
slot_comp(const void *a, const void *b)
{
        asl_legacy1_slot_info_t *ai, *bi;

        if (a == NULL)
        {
                if (b == NULL) return 0;
                return -1;
        }

        if (b == NULL) return 1;

        ai = (asl_legacy1_slot_info_t *)a;
        bi = (asl_legacy1_slot_info_t *)b;

        if (ai->xid < bi->xid) return -1;

        if (ai->xid == bi->xid)
        {
                if (ai->slot < bi->slot) return -1;
                if (ai->slot == bi->slot) return 0;
                return 1;
        }

        return 1;
}

/* find an xid in the slot list */
static uint32_t
slotlist_find(asl_legacy1_t *s, uint64_t xid, int32_t direction)
{
        uint32_t top, bot, mid, range;

        if (s == NULL) return ASL_INDEX_NULL;
        if (s->slotlist_count == 0) return ASL_INDEX_NULL;
        if (xid == 0) return ASL_INDEX_NULL;

        top = s->slotlist_count - 1;
        bot = 0;
        mid = top / 2;

        range = top - bot;
        while (range > 1)
        {
                if (xid == s->slotlist[mid].xid) return mid;
                else if (xid < s->slotlist[mid].xid) top = mid;
                else bot = mid;

                range = top - bot;
                mid = bot + (range / 2);
        }

        if (xid == s->slotlist[top].xid) return top;
        if (xid == s->slotlist[bot].xid) return bot;

        if (direction == 0) return ASL_INDEX_NULL;
        if (direction < 0) return bot;
        return top;
}

static uint32_t
slotlist_init(asl_legacy1_t *s, uint32_t count)
{
        uint32_t i, si, status, hash, addslot;
        uint64_t xid;
        uint8_t t;
        char tmp[DB_RECORD_LEN];

        /* Start at first slot after the header */
        status = fseek(s->db, DB_RECORD_LEN, SEEK_SET);
        if (status != 0) return ASL_STATUS_READ_FAILED;

        s->slotlist = (asl_legacy1_slot_info_t *)calloc(count, sizeof(asl_legacy1_slot_info_t));
        if (s->slotlist == NULL) return ASL_STATUS_NO_MEMORY;

        si = 0;

        for (i = 1; i < count; i++)
        {
                status = fread(tmp, DB_RECORD_LEN, 1, s->db);
                if (status != 1) return ASL_STATUS_READ_FAILED;

                t = tmp[0];
                addslot = 0;
                xid = 0;
                hash = 0;

                if (t == DB_TYPE_EMPTY) addslot = 1;

                if (t == DB_TYPE_STRING)
                {
                        addslot = 1;
                        xid = header_get_id(tmp);
                        hash = header_get_hash(tmp);
                }

                if (t == DB_TYPE_MESSAGE)
                {
                        addslot = 1;
                        xid = header_get_id(tmp);
                }

                if (addslot == 1)
                {
                        s->slotlist[si].type = t;
                        s->slotlist[si].slot = i;
                        s->slotlist[si].xid = xid;
                        s->slotlist[si].hash = hash;
                        si++;
                }
        }

        s->slotlist = (asl_legacy1_slot_info_t *)reallocf(s->slotlist, si * sizeof(asl_legacy1_slot_info_t));
        if (s->slotlist == NULL) return ASL_STATUS_NO_MEMORY;
        s->slotlist_count = si;

        /* slotlist is sorted by xid */
        qsort((void *)s->slotlist, s->slotlist_count, sizeof(asl_legacy1_slot_info_t), slot_comp);

        return ASL_STATUS_OK;
}

uint32_t
asl_legacy1_open(const char *path, asl_legacy1_t **out)
{
        asl_legacy1_t *s;
        struct stat sb;
        int status;
        char cbuf[DB_RECORD_LEN];
        off_t fsize;
        uint32_t count;

        memset(&sb, 0, sizeof(struct stat));
        status = stat(path, &sb);
        if (status < 0) return ASL_STATUS_FAILED;

        fsize = sb.st_size;

        s = (asl_legacy1_t *)calloc(1, sizeof(asl_legacy1_t));
        if (s == NULL) return ASL_STATUS_NO_MEMORY;

        s->db = fopen(path, "r");
        if (s->db == NULL)
        {
                free(s);
                return ASL_STATUS_INVALID_STORE;
        }

        memset(cbuf, 0, DB_RECORD_LEN);
        status = fread(cbuf, DB_RECORD_LEN, 1, s->db);
        if (status != 1)
        {
                fclose(s->db);
                free(s);
                return ASL_STATUS_READ_FAILED;
        }

        /* Check the database Magic Cookie */
        if (strncmp(cbuf, ASL_DB_COOKIE, ASL_DB_COOKIE_LEN))
        {
                fclose(s->db);
                free(s);
                return ASL_STATUS_INVALID_STORE;
        }

        count = fsize / DB_RECORD_LEN;

        status = slotlist_init(s, count);

        *out = s;
        return ASL_STATUS_OK;
}

uint32_t
asl_legacy1_close(asl_legacy1_t *s)
{
        if (s == NULL) return ASL_STATUS_INVALID_STORE;

        if (s->slotlist != NULL) free(s->slotlist);
        if (s->db != NULL) fclose(s->db);
        free(s);

        return ASL_STATUS_OK;
}

static uint32_t
string_fetch_slot(asl_legacy1_t *s, uint32_t slot, char **out)
{
        off_t offset;
        uint8_t type;
        uint32_t status, next, len, x, remaining;
        char *outstr, *p, tmp[DB_RECORD_LEN];

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (out == NULL) return ASL_STATUS_INVALID_ARG;

        *out = NULL;
        offset = slot * DB_RECORD_LEN;
        status = fseek(s->db, offset, SEEK_SET);

        if (status < 0) return ASL_STATUS_READ_FAILED;

        status = fread(tmp, DB_RECORD_LEN, 1, s->db);
        if (status != 1) return ASL_STATUS_READ_FAILED;

        type = tmp[0];
        if (type != DB_TYPE_STRING) return ASL_STATUS_INVALID_STRING;

        len = _asl_get_32(tmp + 21);
        if (len == 0) return ASL_STATUS_OK;

        next = header_get_next(tmp);

        outstr = calloc(1, len);
        if (outstr == NULL) return ASL_STATUS_NO_MEMORY;

        p = outstr;
        remaining = len;

        x = DB_RECORD_LEN - DB_HLEN_STRING;
        if (x > remaining) x = remaining;

        memcpy(p, tmp + DB_HLEN_STRING, x);
        p += x;
        remaining -= x;

        while ((next != 0) && (remaining > 0))
        {
                offset = next * DB_RECORD_LEN;
                status = fseek(s->db, offset, SEEK_SET);

                if (status < 0)
                {
                        free(outstr);
                        return ASL_STATUS_READ_FAILED;
                }

                status = fread(tmp, DB_RECORD_LEN, 1, s->db);
                if (status != 1)
                {
                        free(outstr);
                        return ASL_STATUS_READ_FAILED;
                }

                next = header_get_next(tmp);

                x = DB_RECORD_LEN - DB_HLEN_STRCONT;
                if (x > remaining) x = remaining;

                memcpy(p, tmp + DB_HLEN_STRCONT, x);
                p += x;
                remaining -= x;
        }

        if ((next != 0) || (remaining != 0))
        {
                free(outstr);
                return ASL_STATUS_READ_FAILED;
        }

        *out = outstr;
        return ASL_STATUS_OK;
}

static uint32_t
string_fetch_sid(asl_legacy1_t *s, uint64_t sid, char **out)
{
        uint32_t i, len, ref;
        uint64_t nsid;
        uint8_t inls;
        char *p;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (out == NULL) return ASL_STATUS_INVALID_ARG;

        *out = NULL;
        if (sid == ASL_REF_NULL) return ASL_STATUS_OK;

        ref = 0;

        inls = 0;
        nsid = _asl_htonq(sid);
        memcpy(&inls, &nsid, 1);
        if (inls & 0x80)
        {
                /* inline string */
                inls &= 0x0f;
                len = inls;
                *out = calloc(1, len);
                if (*out == NULL) return ASL_STATUS_NO_MEMORY;
                p = 1 + (char *)&nsid;
                memcpy(*out, p, len);
                return ASL_STATUS_OK;
        }

        /* Find the string in the database */
        i = slotlist_find(s, sid, 0);
        if (i == ASL_INDEX_NULL) return ASL_STATUS_NOT_FOUND;

        return string_fetch_slot(s, s->slotlist[i].slot, out);
}

static uint32_t
pmsg_fetch(asl_legacy1_t *s, uint32_t slot, uint32_t action, pmsg_t **pmsg)
{
        off_t offset;
        uint32_t status, i, n, v32, next;
        int32_t msgu, msgg;
        uint64_t msgid;
        uint16_t flags;
        pmsg_t *out;
        char *p, tmp[DB_RECORD_LEN];

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (pmsg == NULL) return ASL_STATUS_INVALID_ARG;

        out = NULL;

        if ((action == PMSG_FETCH_ALL) || (action == PMSG_FETCH_STD))
        {
                *pmsg = NULL;

                offset = slot * DB_RECORD_LEN;
                status = fseek(s->db, offset, SEEK_SET);

                if (status < 0) return ASL_STATUS_READ_FAILED;

                status = fread(tmp, DB_RECORD_LEN, 1, s->db);
                if (status != 1) return ASL_STATUS_READ_FAILED;

                msgid = _asl_get_64(tmp + MSG_OFF_KEY_ID);
                msgu = _asl_get_32(tmp + MSG_OFF_KEY_RUID);
                msgg = _asl_get_32(tmp + MSG_OFF_KEY_RGID);
                flags = _asl_get_16(tmp + MSG_OFF_KEY_FLAGS);

                out = (pmsg_t *)calloc(1, sizeof(pmsg_t));
                if (out == NULL) return ASL_STATUS_NO_MEMORY;


                p = tmp + 21;

                /* ID */
                out->msgid = msgid;

                /* ReadUID */
                out->ruid = msgu;

                /* ReadGID */
                out->rgid = msgg;

                /* Time */
                out->time = _asl_get_64(p);
                p += 8;

                /* Host */
                out->host = _asl_get_64(p);
                p += 8;

                /* Sender */
                out->sender = _asl_get_64(p);
                p += 8;

                /* Facility */
                out->facility = _asl_get_64(p);
                p += 8;

                /* Level */
                out->level = _asl_get_32(p);
                p += 4;

                /* PID */
                out->pid = _asl_get_32(p);
                p += 4;

                /* UID */
                out->uid = _asl_get_32(p);
                p += 4;

                /* GID */
                out->gid = _asl_get_32(p);
                p += 4;

                /* Message */
                out->message = _asl_get_64(p);
                p += 8;

                next = header_get_next(tmp);
                out->next = next;

                if (action == PMSG_FETCH_STD)
                {
                        /* caller only wants "standard" keys */
                        *pmsg = out;
                        return ASL_STATUS_OK;
                }

                *pmsg = out;
        }
        else
        {
                out = *pmsg;
        }

        n = 0;
        next = out->next;

        while (next != 0)
        {
                offset = next * DB_RECORD_LEN;
                status = fseek(s->db, offset, SEEK_SET);
                if (status < 0)
                {
                        *pmsg = NULL;
                        free(out);
                        return ASL_STATUS_READ_FAILED;
                }

                status = fread(tmp, DB_RECORD_LEN, 1, s->db);
                if (status != 1)
                {
                        *pmsg = NULL;
                        free(out);
                        return ASL_STATUS_READ_FAILED;
                }

                if (out->kvcount == 0)
                {
                        v32 = _asl_get_32(tmp + 5);
                        out->kvcount = v32 * 2;
                        out->kvlist = (uint64_t *)calloc(out->kvcount, sizeof(uint64_t));
                        if (out->kvlist == NULL)
                        {
                                *pmsg = NULL;
                                free(out);
                                return ASL_STATUS_NO_MEMORY;
                        }
                }

                p = tmp + 9;

                for (i = 0; (i < 4) && (n < out->kvcount); i++)
                {
                        out->kvlist[n++] = _asl_get_64(p);
                        p += 8;

                        out->kvlist[n++] = _asl_get_64(p);
                        p += 8;
                }

                next = header_get_next(tmp);
        }

        return ASL_STATUS_OK;
}

static uint32_t
pmsg_match(asl_legacy1_t *s, pmsg_t *q, pmsg_t *m)
{
        uint32_t i, j;

        if (s == NULL) return 0;
        if (q == NULL) return 1;
        if (m == NULL) return 0;

        if (q->kselect & PMSG_SEL_TIME)
        {
                if (q->time == ASL_REF_NULL) return 0;
                if ((q->vselect & PMSG_SEL_TIME) && (q->time != m->time)) return 0;
        }

        if (q->kselect & PMSG_SEL_HOST)
        {
                if (q->host == ASL_REF_NULL) return 0;
                if ((q->vselect & PMSG_SEL_HOST) && (q->host != m->host)) return 0;
        }

        if (q->kselect & PMSG_SEL_SENDER)
        {
                if (q->sender == ASL_REF_NULL) return 0;
                if ((q->vselect & PMSG_SEL_SENDER) && (q->sender != m->sender)) return 0;
        }

        if (q->kselect & PMSG_SEL_FACILITY)
        {
                if (q->facility == ASL_REF_NULL) return 0;
                if ((q->vselect & PMSG_SEL_FACILITY) && (q->facility != m->facility)) return 0;
        }

        if (q->kselect & PMSG_SEL_MESSAGE)
        {
                if (q->message == ASL_REF_NULL) return 0;
                if ((q->vselect & PMSG_SEL_MESSAGE) && (q->message != m->message)) return 0;
        }

        if (q->kselect & PMSG_SEL_LEVEL)
        {
                if (q->level == ASL_INDEX_NULL) return 0;
                if ((q->vselect & PMSG_SEL_LEVEL) && (q->level != m->level)) return 0;
        }

        if (q->kselect & PMSG_SEL_PID)
        {
                if (q->pid == -1) return 0;
                if ((q->vselect & PMSG_SEL_PID) && (q->pid != m->pid)) return 0;
        }

        if (q->kselect & PMSG_SEL_UID)
        {
                if (q->uid == -2) return 0;
                if ((q->vselect & PMSG_SEL_UID) && (q->uid != m->uid)) return 0;
        }

        if (q->kselect & PMSG_SEL_GID)
        {
                if (q->gid == -2) return 0;
                if ((q->vselect & PMSG_SEL_GID) && (q->gid != m->gid)) return 0;
        }

        if (q->kselect & PMSG_SEL_RUID)
        {
                if (q->ruid == -1) return 0;
                if ((q->vselect & PMSG_SEL_RUID) && (q->ruid != m->ruid)) return 0;
        }

        if (q->kselect & PMSG_SEL_RGID)
        {
                if (q->rgid == -1) return 0;
                if ((q->vselect & PMSG_SEL_RGID) && (q->rgid != m->rgid)) return 0;
        }

        for (i = 0; i < q->kvcount; i += 2)
        {
                for (j = 0; j < m->kvcount; j += 2)
                {
                        if (q->kvlist[i] == m->kvlist[j])
                        {
                                if (q->kvlist[i + 1] == m->kvlist[j + 1]) break;
                                return 0;
                        }
                }

                if (j >= m->kvcount) return 0;
        }

        return 1;
}

static void
free_pmsg(pmsg_t *p)
{
        if (p == NULL) return;
        if (p->kvlist != NULL) free(p->kvlist);
        free(p);
}

static uint32_t
pmsg_fetch_by_id(asl_legacy1_t *s, uint64_t msgid, pmsg_t **pmsg, uint32_t *slot)
{
        uint32_t i, status;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (msgid == ASL_REF_NULL) return ASL_STATUS_INVALID_ARG;
        if (slot == NULL) return ASL_STATUS_INVALID_ARG;

        *slot = ASL_INDEX_NULL;

        i = slotlist_find(s, msgid, 0);
        if (i == ASL_INDEX_NULL) return ASL_STATUS_INVALID_ID;

        *slot = s->slotlist[i].slot;

        /* read the message */
        *pmsg = NULL;
        status = pmsg_fetch(s, s->slotlist[i].slot, PMSG_FETCH_ALL, pmsg);
        if (status != ASL_STATUS_OK) return status;
        if (pmsg == NULL) return ASL_STATUS_FAILED;

        return status;
}

static uint32_t
msg_decode(asl_legacy1_t *s, pmsg_t *pmsg, asl_msg_t **out)
{
        uint32_t status, i, n;
        char *key, *val;
        asl_msg_t *msg;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (out == NULL) return ASL_STATUS_INVALID_ARG;
        if (pmsg == NULL) return ASL_STATUS_INVALID_ARG;

        *out = NULL;

        msg = (asl_msg_t *)calloc(1, sizeof(asl_msg_t));
        if (msg == NULL) return ASL_STATUS_NO_MEMORY;

        msg->type = ASL_TYPE_MSG;
        msg->count = 0;
        if (pmsg->time != ASL_REF_NULL) msg->count++;
        if (pmsg->host != ASL_REF_NULL) msg->count++;
        if (pmsg->sender != ASL_REF_NULL) msg->count++;
        if (pmsg->facility != ASL_REF_NULL) msg->count++;
        if (pmsg->message != ASL_REF_NULL) msg->count++;
        if (pmsg->level != ASL_INDEX_NULL) msg->count++;
        if (pmsg->pid != -1) msg->count++;
        if (pmsg->uid != -2) msg->count++;
        if (pmsg->gid != -2) msg->count++;
        if (pmsg->ruid != -1) msg->count++;
        if (pmsg->rgid != -1) msg->count++;

        msg->count += pmsg->kvcount / 2;

        if (msg->count == 0)
        {
                free(msg);
                return ASL_STATUS_INVALID_MESSAGE;
        }

        /* Message ID */
        msg->count += 1;

        msg->key = (char **)calloc(msg->count, sizeof(char *));
        if (msg->key == NULL)
        {
                free(msg);
                return ASL_STATUS_NO_MEMORY;
        }

        msg->val = (char **)calloc(msg->count, sizeof(char *));
        if (msg->val == NULL)
        {
                free(msg->key);
                free(msg);
                return ASL_STATUS_NO_MEMORY;
        }

        n = 0;

        /* Time */
        if (pmsg->time != ASL_REF_NULL)
        {
                msg->key[n] = strdup(ASL_KEY_TIME);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%llu", pmsg->time);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* Host */
        if (pmsg->host != ASL_REF_NULL)
        {
                msg->key[n] = strdup(ASL_KEY_HOST);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                status = string_fetch_sid(s, pmsg->host, &(msg->val[n]));
                n++;
        }

        /* Sender */
        if (pmsg->sender != ASL_REF_NULL)
        {
                msg->key[n] = strdup(ASL_KEY_SENDER);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                status = string_fetch_sid(s, pmsg->sender, &(msg->val[n]));
                n++;
        }

        /* Facility */
        if (pmsg->facility != ASL_REF_NULL)
        {
                msg->key[n] = strdup(ASL_KEY_FACILITY);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                status = string_fetch_sid(s, pmsg->facility, &(msg->val[n]));
                n++;
        }

        /* Level */
        if (pmsg->level != ASL_INDEX_NULL)
        {
                msg->key[n] = strdup(ASL_KEY_LEVEL);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%u", pmsg->level);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* PID */
        if (pmsg->pid != -1)
        {
                msg->key[n] = strdup(ASL_KEY_PID);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%d", pmsg->pid);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* UID */
        if (pmsg->uid != -2)
        {
                msg->key[n] = strdup(ASL_KEY_UID);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%d", pmsg->uid);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* GID */
        if (pmsg->gid != -2)
        {
                msg->key[n] = strdup(ASL_KEY_GID);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%d", pmsg->gid);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* Message */
        if (pmsg->message != ASL_REF_NULL)
        {
                msg->key[n] = strdup(ASL_KEY_MSG);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                status = string_fetch_sid(s, pmsg->message, &(msg->val[n]));
                n++;
        }

        /* ReadUID */
        if (pmsg->ruid != -1)
        {
                msg->key[n] = strdup(ASL_KEY_READ_UID);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%d", pmsg->ruid);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* ReadGID */
        if (pmsg->rgid != -1)
        {
                msg->key[n] = strdup(ASL_KEY_READ_GID);
                if (msg->key[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }

                asprintf(&(msg->val[n]), "%d", pmsg->rgid);
                if (msg->val[n] == NULL)
                {
                        asl_free(msg);
                        return ASL_STATUS_NO_MEMORY;
                }
                n++;
        }

        /* Message ID */
        msg->key[n] = strdup(ASL_KEY_MSG_ID);
        if (msg->key[n] == NULL)
        {
                asl_free(msg);
                return ASL_STATUS_NO_MEMORY;
        }

        asprintf(&(msg->val[n]), "%llu", pmsg->msgid);
        if (msg->val[n] == NULL)
        {
                asl_free(msg);
                return ASL_STATUS_NO_MEMORY;
        }
        n++;

        /* Key - Value List */
        for (i = 0; i < pmsg->kvcount; i++)
        {
                key = NULL;
                status = string_fetch_sid(s, pmsg->kvlist[i++], &key);
                if (status != ASL_STATUS_OK)
                {
                        if (key != NULL) free(key);
                        continue;
                }

                val = NULL;
                status = string_fetch_sid(s, pmsg->kvlist[i], &val);
                if (status != ASL_STATUS_OK)
                {
                        if (key != NULL) free(key);
                        if (val != NULL) free(val);
                        continue;
                }

                msg->key[n] = key;
                msg->val[n] = val;
                n++;
        }

        *out = msg;
        return ASL_STATUS_OK;
}

/*
 * Finds string either in the string cache or in the database
 */
static uint32_t
store_string_find(asl_legacy1_t *s, uint32_t hash, const char *str, uint32_t *index)
{
        uint32_t i, status;
        char *tmp;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (str == NULL) return ASL_STATUS_INVALID_ARG;
        if (index == NULL) return ASL_STATUS_INVALID_ARG;
        if (s->slotlist == NULL) return ASL_STATUS_FAILED;

        /* check the database */
        for (i = 0; i < s->slotlist_count; i++)
        {
                if ((s->slotlist[i].type != DB_TYPE_STRING) || (s->slotlist[i].hash != hash)) continue;

                /* read the whole string */
                tmp = NULL;
                status = string_fetch_slot(s, s->slotlist[i].slot, &tmp);
                if (status != ASL_STATUS_OK) return status;
                if (tmp == NULL) return ASL_STATUS_FAILED;

                status = strcmp(tmp, str);
                free(tmp);
                if (status != 0) continue;

                /* Bingo! */
                *index = i;
                return ASL_STATUS_OK;
        }

        return ASL_STATUS_FAILED;
}

/*
 * Looks up a string ID number.
 */
static uint64_t
string_lookup(asl_legacy1_t *s, const char *str)
{
        uint32_t status, hash, index, slot, len;
        uint64_t nsid, sid;
        char *p;
        uint8_t inls;

        if (s == NULL) return ASL_REF_NULL;
        if (str == NULL) return ASL_REF_NULL;

        sid = ASL_REF_NULL;
        index = ASL_INDEX_NULL;
        slot = ASL_INDEX_NULL;

        len = strlen(str);
        if (len < 8)
        {
                /* inline string */
                inls = len;
                inls |= 0x80;

                nsid = 0;
                p = (char *)&nsid;
                memcpy(p, &inls, 1);
                memcpy(p + 1, str, len);
                sid = _asl_ntohq(nsid);
                return sid;
        }

        hash = asl_core_string_hash(str, len);

        /* check the database */
        status = store_string_find(s, hash, str, &index);
        if (status == ASL_STATUS_OK)
        {
                if (index == ASL_INDEX_NULL) return ASL_REF_NULL;
                return s->slotlist[index].xid;
        }

        return ASL_REF_NULL;
}

uint32_t
asl_legacy1_fetch(asl_legacy1_t *s, uint64_t msgid, asl_msg_t **msg)
{
        uint32_t status, slot;
        pmsg_t *pmsg;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (msgid == ASL_REF_NULL) return ASL_STATUS_INVALID_ARG;

        pmsg = NULL;
        slot = ASL_INDEX_NULL;

        status = pmsg_fetch_by_id(s, msgid, &pmsg, &slot);
        if (status != ASL_STATUS_OK) return status;
        if (pmsg == NULL) return ASL_STATUS_FAILED;

        status = msg_decode(s, pmsg, msg);
        free_pmsg(pmsg);

        return status;
}

static uint32_t
query_to_pmsg(asl_legacy1_t *s, asl_msg_t *q, pmsg_t **p)
{
        pmsg_t *out;
        uint32_t i, j;
        uint64_t ksid, vsid;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if (p == NULL) return ASL_STATUS_INVALID_ARG;

        if (q == NULL) return Q_NULL;
        if (q->count == 0) return Q_NULL;

        *p = NULL;

        if (q->op != NULL)
        {
                for (i = 0; i < q->count; i++) if (q->op[i] != ASL_QUERY_OP_EQUAL) return Q_SLOW;
        }

        out = (pmsg_t *)calloc(1, sizeof(pmsg_t));
        if (out == NULL) return ASL_STATUS_NO_MEMORY;

        for (i = 0; i < q->count; i++)
        {
                if (q->key[i] == NULL) continue;

                else if (!strcmp(q->key[i], ASL_KEY_TIME))
                {
                        if (out->kselect & PMSG_SEL_TIME)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_TIME;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_TIME;
                                out->time = asl_parse_time(q->val[i]);
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_HOST))
                {
                        if (out->kselect & PMSG_SEL_HOST)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_HOST;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_HOST;
                                out->host = string_lookup(s, q->val[i]);
                                if (out->host == ASL_REF_NULL)
                                {
                                        free_pmsg(out);
                                        return Q_FAIL;
                                }
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_SENDER))
                {
                        if (out->kselect & PMSG_SEL_SENDER)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_SENDER;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_SENDER;
                                out->sender = string_lookup(s, q->val[i]);
                                if (out->sender == ASL_REF_NULL)
                                {
                                        free_pmsg(out);
                                        return Q_FAIL;
                                }
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_PID))
                {
                        if (out->kselect & PMSG_SEL_PID)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_PID;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_PID;
                                out->pid = atoi(q->val[i]);
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_UID))
                {
                        if (out->kselect & PMSG_SEL_UID)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_UID;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_UID;
                                out->uid = atoi(q->val[i]);
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_GID))
                {
                        if (out->kselect & PMSG_SEL_GID)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_GID;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_GID;
                                out->gid = atoi(q->val[i]);
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_LEVEL))
                {
                        if (out->kselect & PMSG_SEL_LEVEL)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_LEVEL;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_LEVEL;
                                out->level = atoi(q->val[i]);
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_MSG))
                {
                        if (out->kselect & PMSG_SEL_MESSAGE)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_MESSAGE;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_MESSAGE;
                                out->message = string_lookup(s, q->val[i]);
                                if (out->message == ASL_REF_NULL)
                                {
                                        free_pmsg(out);
                                        return Q_FAIL;
                                }
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_FACILITY))
                {
                        if (out->kselect & PMSG_SEL_FACILITY)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_FACILITY;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_FACILITY;
                                out->facility = string_lookup(s, q->val[i]);
                                if (out->facility == ASL_REF_NULL)
                                {
                                        free_pmsg(out);
                                        return Q_FAIL;
                                }
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_READ_UID))
                {
                        if (out->kselect & PMSG_SEL_RUID)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_RUID;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_RUID;
                                out->ruid = atoi(q->val[i]);
                        }
                }
                else if (!strcmp(q->key[i], ASL_KEY_READ_GID))
                {
                        if (out->kselect & PMSG_SEL_RGID)
                        {
                                free_pmsg(out);
                                return Q_SLOW;
                        }

                        out->kselect |= PMSG_SEL_RGID;
                        if (q->val[i] != NULL)
                        {
                                out->vselect |= PMSG_SEL_RGID;
                                out->rgid = atoi(q->val[i]);
                        }
                }
                else
                {
                        ksid = string_lookup(s, q->key[i]);
                        if (ksid == ASL_REF_NULL)
                        {
                                free_pmsg(out);
                                return Q_FAIL;
                        }

                        for (j = 0; j < out->kvcount; j += 2)
                        {
                                if (out->kvlist[j] == ksid)
                                {
                                        free_pmsg(out);
                                        return Q_SLOW;
                                }
                        }

                        vsid = ASL_REF_NULL;
                        if (q->val[i] != NULL)
                        {
                                vsid = string_lookup(s, q->val[i]);
                                if (ksid == ASL_REF_NULL)
                                {
                                        free_pmsg(out);
                                        return Q_FAIL;
                                }
                        }

                        if (out->kvcount == 0)
                        {
                                out->kvlist = (uint64_t *)calloc(2, sizeof(uint64_t));
                        }
                        else
                        {
                                out->kvlist = (uint64_t *)reallocf(out->kvlist, (out->kvcount + 2) * sizeof(uint64_t));
                        }

                        if (out->kvlist == NULL)
                        {
                                free_pmsg(out);
                                return ASL_STATUS_NO_MEMORY;
                        }

                        out->kvlist[out->kvcount++] = ksid;
                        out->kvlist[out->kvcount++] = vsid;
                }
        }

        *p = out;
        return Q_FAST;
}

static uint32_t
msg_match(asl_legacy1_t *s, uint32_t qtype, pmsg_t *qp, asl_msg_t *q, uint32_t slot, pmsg_t **iopm, asl_msg_t **iomsg, asl_msg_list_t **res, uint32_t *didmatch)
{
        uint32_t status, what;

        *didmatch = 0;

        if (qtype == Q_FAIL) return ASL_STATUS_OK;

        if (qtype == Q_NULL)
        {
                if (*iopm == NULL)
                {
                        status = pmsg_fetch(s, slot, PMSG_FETCH_ALL, iopm);
                        if (status != ASL_STATUS_OK) return status;
                        if (*iopm == NULL) return ASL_STATUS_FAILED;
                }
        }
        else if (qtype == Q_FAST)
        {
                if (qp == NULL) return ASL_STATUS_INVALID_ARG;

                what = PMSG_FETCH_STD;
                if (qp->kvcount > 0) what = PMSG_FETCH_ALL;

                if (*iopm == NULL)
                {
                        status = pmsg_fetch(s, slot, what, iopm);
                        if (status != ASL_STATUS_OK) return status;
                        if (*iopm == NULL) return ASL_STATUS_FAILED;
                }

                status = pmsg_match(s, qp, *iopm);
                if (status == 1)
                {
                        if ((what == PMSG_FETCH_STD) && ((*iopm)->next != 0) && ((*iopm)->kvcount == 0))
                        {
                                status = pmsg_fetch(s, slot, PMSG_FETCH_KV, iopm);
                                if (status != ASL_STATUS_OK) return status;
                                if (*iopm == NULL) return ASL_STATUS_FAILED;
                        }
                }
                else return ASL_STATUS_OK;
        }
        else if (qtype == Q_SLOW)
        {
                if (*iomsg == NULL)
                {
                        if (*iopm == NULL)
                        {
                                status = pmsg_fetch(s, slot, PMSG_FETCH_ALL, iopm);
                                if (status != ASL_STATUS_OK) return status;
                                if (*iopm == NULL) return ASL_STATUS_FAILED;
                        }

                        status = msg_decode(s, *iopm, iomsg);
                        if (status == ASL_STATUS_INVALID_MESSAGE) return ASL_STATUS_OK;
                        if (status != ASL_STATUS_OK) return status;
                        if (*iomsg == NULL) return ASL_STATUS_FAILED;
                }

                status = 0;
                if (asl_msg_cmp(q, *iomsg) != 0) status = 1;
                if (status == 0) return ASL_STATUS_OK;
        }

        *didmatch = 1;

        if (res == NULL) return ASL_STATUS_OK;

        if (*iomsg == NULL)
        {
                status = msg_decode(s, *iopm, iomsg);
                if (status == ASL_STATUS_INVALID_MESSAGE)
                {
                        *didmatch = 0;
                        return ASL_STATUS_OK;
                }

                if (status != ASL_STATUS_OK) return status;
        }

        if ((*res)->count == 0) (*res)->msg = (asl_msg_t **)calloc(1, sizeof(asl_msg_t *));
        else (*res)->msg = (asl_msg_t **)reallocf((*res)->msg, (1 + (*res)->count) * sizeof(asl_msg_t *));
        if ((*res)->msg == NULL) return ASL_STATUS_NO_MEMORY;

        (*res)->msg[(*res)->count++] = *iomsg;

        return ASL_STATUS_OK;
}

static uint32_t
next_search_slot(asl_legacy1_t *s, uint32_t last_si, int32_t direction)
{
        uint32_t i;

        if (direction >= 0)
        {
                for (i = last_si + 1; i < s->slotlist_count; i++)
                {
                        if (s->slotlist[i].type == DB_TYPE_MESSAGE) return i;
                }

                return ASL_INDEX_NULL;
        }

        if (last_si == 0) return ASL_INDEX_NULL;
        if (last_si > s->slotlist_count) return ASL_INDEX_NULL;

        for (i = last_si - 1; i > 0; i--)
        {
                if (s->slotlist[i].type == DB_TYPE_MESSAGE) return i;
        }

        if (s->slotlist[0].type == DB_TYPE_MESSAGE) return 0;

        return ASL_INDEX_NULL;
}

static uint32_t
query_list_to_pmsg_list(asl_legacy1_t *s, asl_msg_list_t *query, uint32_t *match, pmsg_t ***qp, uint32_t **qtype, uint32_t *count)
{
        pmsg_t **outp, *pm;
        uint32_t i, j, *outt;
        *match = 0;
        *qp = NULL;
        *qtype = 0;
        *count = 0;

        if (query == NULL) return ASL_STATUS_OK;
        if (match == NULL) return ASL_STATUS_INVALID_ARG;
        if (qp == NULL) return ASL_STATUS_INVALID_ARG;
        if (qtype == NULL) return ASL_STATUS_OK;
        if (query->msg == NULL) return ASL_STATUS_OK;
        if (query->count == 0) return ASL_STATUS_OK;

        outp = (pmsg_t **)calloc(query->count, sizeof(pmsg_t *));
        if (outp == NULL) return ASL_STATUS_NO_MEMORY;

        outt = (uint32_t *)calloc(query->count, sizeof(uint32_t));
        if (outt == NULL)
        {
                free(outp);
                return ASL_STATUS_NO_MEMORY;
        }

        *match = 1;

        for (i = 0; i < query->count; i++)
        {
                pm = NULL;
                outt[i] = query_to_pmsg(s, query->msg[i], &pm);
                if (outt[i] <= ASL_STATUS_FAILED)
                {
                        if (pm != NULL) free_pmsg(pm);
                        for (j = 0; j < i; j++) free_pmsg(outp[j]);
                        free(outp);
                        free(outt);
                        return ASL_STATUS_NO_MEMORY;
                }

                outp[i] = pm;
        }

        *count = query->count;
        *qp = outp;
        *qtype = outt;
        return ASL_STATUS_OK;
}

static void
match_worker_cleanup(pmsg_t **ql, uint32_t *qt, uint32_t n, asl_msg_list_t **res)
{
        uint32_t i;

        if (ql != NULL)
        {
                for (i = 0; i < n; i++) free_pmsg(ql[i]);
                free(ql);
        }

        if (qt != NULL) free(qt);

        if (res != NULL)
        {
                for (i = 0; i < (*res)->count; i++) asl_free((*res)->msg[i]);
                free(*res);
        }
}

/*
 * Input to asl_legacy1_match is a list of queries.
 * A record in the store matches if it matches any query (i.e. query list is "OR"ed)
 *
 * If counting up (direction is positive) find first record with ID > start_id.
 * Else if counting down (direction is negative) find first record with ID < start_id.
 *
 * Set match flag on.
 * If any query is NULL, set match flog off (skips matching below).
 * Else if all queries only check "standard" keys, set std flag to on.
 *
 * If a query only tests equality, convert it to a pmsg_t.  The conversion routine
 * checks for string values that are NOT in the database.  If a string is not found,
 * the conversion fails and the query is markes as "never matches". Otherwise,
 * the query is marked "fast".
 *
 * If all queries are marked as "never matches", return NULL.
 *
 * match loop:
 *  fetch record (with std flag)
 *  if match flag is off, decode record and add it to result.
 *  else for each query:
 *    if query is NULL (shouldn't happen) decode record and add it to result.  Return to match loop.
 *    else if query never matches, ignore it.
 *    else if query is fast, use pmsg_match.  If it succeeds, decode record and add it to result.  Return to match loop.
 *    else decode record and use asl_cmp.  If it succeeds, add record to result.  Return to match loop.
 *
 * return results.
 */
static uint32_t
match_worker(asl_legacy1_t *s, asl_msg_list_t *query, asl_msg_list_t **res, uint64_t *last_id, uint64_t **idlist, uint32_t *idcount, uint64_t start_id, int32_t count, int32_t direction)
{
        uint32_t mx, si, slot, i, qcount, match, didmatch, status, *qtype;
        uint64_t xid;
        pmsg_t **qp, *iopmsg;
        asl_msg_t *iomsg;

        if (s == NULL) return ASL_STATUS_INVALID_STORE;
        if ((res == NULL) && (idlist == NULL)) return ASL_STATUS_INVALID_ARG;
        if (last_id == NULL) return ASL_STATUS_INVALID_ARG;
        if (idcount == NULL) return ASL_STATUS_INVALID_ARG;

        if (res != NULL) *res = NULL;
        if (idlist != NULL) *idlist = NULL;

        mx = 0;

        if (direction < 0) direction = -1;
        else direction = 1;

        si = ASL_INDEX_NULL;
        if ((direction == -1) && (start_id == ASL_REF_NULL)) si = s->slotlist_count;
        else si = slotlist_find(s, start_id, direction);

        si = next_search_slot(s, si, direction);
        if (si == ASL_INDEX_NULL) return ASL_STATUS_OK;
        if (si >= s->slotlist_count) return ASL_STATUS_FAILED;

        slot = s->slotlist[si].slot;

        status = query_list_to_pmsg_list(s, query, &match, &qp, &qtype, &qcount);
        if (status != ASL_STATUS_OK) return status;

        /*
         * initialize result list if we've been asked to return messages
         */
        if (res != NULL)
        {
                *res = (asl_msg_list_t *)calloc(1, sizeof(asl_msg_list_t));
                if (*res == NULL)
                {
                        match_worker_cleanup(qp, qtype, qcount, NULL);
                        return ASL_STATUS_NO_MEMORY;
                }
        }

        /*
         * loop through records
         */
        *idcount = 0;
        while ((count == 0) || (*idcount < count))
        {
                if (si == ASL_INDEX_NULL) break;
                if (si >= s->slotlist_count) break;

                slot = s->slotlist[si].slot;
                xid = s->slotlist[si].xid;

                *last_id = xid;

                iopmsg = NULL;
                iomsg = NULL;

                didmatch = 0;
                if (match == 0)
                {
                        status = msg_match(s, Q_NULL, NULL, NULL, slot, &iopmsg, &iomsg, res, &didmatch);
                        free_pmsg(iopmsg);
                        if (didmatch == 0)
                        {
                                asl_free(iomsg);
                                iomsg = NULL;
                        }
                        else
                        {
                                if (idlist != NULL)
                                {
                                        if (*idlist == NULL) *idlist = (uint64_t *)calloc(1, sizeof(uint64_t));
                                        else *idlist = (uint64_t *)reallocf(*idlist, (*idcount + 1) * sizeof(uint64_t));
                                        if (*idlist == NULL) status = ASL_STATUS_NO_MEMORY;
                                        else (*idlist)[*idcount] = xid;
                                }

                                (*idcount)++;
                        }

                        if (status != ASL_STATUS_OK)
                        {
                                match_worker_cleanup(qp, qtype, qcount, res);
                                return status;
                        }
                }
                else
                {
                        for (i = 0; i < qcount; i++)
                        {
                                status = msg_match(s, qtype[i], qp[i], query->msg[i], slot, &iopmsg, &iomsg, res, &didmatch);
                                if (status != ASL_STATUS_OK)
                                {
                                        free_pmsg(iopmsg);
                                        asl_free(iomsg);
                                        match_worker_cleanup(qp, qtype, qcount, res);
                                        return status;
                                }

                                if (didmatch == 1)
                                {
                                        if (idlist != NULL)
                                        {
                                                if (*idlist == NULL) *idlist = (uint64_t *)calloc(1, sizeof(uint64_t));
                                                else *idlist = (uint64_t *)reallocf(*idlist, (*idcount + 1) * sizeof(uint64_t));
                                                if (*idlist == NULL)
                                                {
                                                        match_worker_cleanup(qp, qtype, qcount, res);
                                                        return ASL_STATUS_NO_MEMORY;
                                                }

                                                (*idlist)[*idcount] = xid;
                                        }

                                        (*idcount)++;
                                        break;
                                }
                        }

                        free_pmsg(iopmsg);
                        if ((didmatch == 0) || (res == NULL)) asl_free(iomsg);
                }

                si = next_search_slot(s, si, direction);
        }

        match_worker_cleanup(qp, qtype, qcount, NULL);
        return status;
}

uint32_t
asl_legacy1_match(asl_legacy1_t *s, asl_msg_list_t *query, asl_msg_list_t **res, uint64_t *last_id, uint64_t start_id, uint32_t count, int32_t direction)
{
        uint32_t idcount;

        idcount = 0;
        return match_worker(s, query, res, last_id, NULL, &idcount, start_id, count, direction);
}