+#include <asl_store.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
+
+/*
+ * 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
+
+#define mix(a, b, c) \
+{ \
+ a -= b; a -= c; a ^= (c>>13); \
+ b -= c; b -= a; b ^= (a<< 8); \
+ c -= a; c -= b; c ^= (b>>13); \
+ a -= b; a -= c; a ^= (c>>12); \
+ b -= c; b -= a; b ^= (a<<16); \
+ c -= a; c -= b; c ^= (b>> 5); \
+ a -= b; a -= c; a ^= (c>> 3); \
+ b -= c; b -= a; b ^= (a<<10); \
+ c -= a; c -= b; c ^= (b>>15); \
+}
+
+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
+
+#define ARCHIVE_DELETE_VS_COPY_PERCENT 5
+
+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 void
+_asl_put_16(uint16_t i, char *h)
+{
+ uint16_t x;
+
+ x = htons(i);
+ memcpy(h, &x, 2);
+}
+
+static uint32_t
+_asl_get_32(char *h)
+{
+ uint32_t x;
+
+ memcpy(&x, h, 4);
+ return ntohl(x);
+}
+
+static void
+_asl_put_32(uint32_t i, char *h)
+{
+ uint32_t x;
+
+ x = htonl(i);
+ memcpy(h, &x, 4);
+}
+
+static uint64_t
+_asl_get_64(char *h)
+{
+ uint64_t x;
+
+ memcpy(&x, h, 8);
+ return _asl_ntohq(x);
+}
+
+static void
+_asl_put_64(uint64_t i, char *h)
+{
+ uint64_t x;
+
+ x = _asl_htonq(i);
+ memcpy(h, &x, 8);
+}
+
+#define header_get_next(h) _asl_get_32(h + 1)
+#define header_get_id(h) _asl_get_64(h + 5)
+#define header_get_refcount(h) _asl_get_32(h + 13)
+#define header_get_hash(h) _asl_get_32(h + 17)
+
+#define header_put_next(i, h) _asl_put_32(i, h + 1)
+#define header_put_id(i, h) _asl_put_64(i, h + 5)
+#define header_put_refcount(i, h) _asl_put_32(i, h + 13)
+#define header_put_hash(i, h) _asl_put_32(i, 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)
+{
+ slot_info_t *ai, *bi;
+
+ if (a == NULL)
+ {
+ if (b == NULL) return 0;
+ return -1;
+ }
+
+ if (b == NULL) return 1;
+
+ ai = (slot_info_t *)a;
+ bi = (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 a slot (with xid 0) in the slot list */
+static uint32_t
+slotlist_find_xid0_slot(asl_store_t *s, uint32_t slot)
+{
+ uint32_t top, bot, mid, range;
+
+ if (s == NULL) return ASL_INDEX_NULL;
+ if (s->slot_zero_count == 0) return ASL_INDEX_NULL;
+
+ top = s->slot_zero_count - 1;
+ bot = 0;
+ mid = top / 2;
+
+ range = top - bot;
+ while (range > 1)
+ {
+ if (slot == s->slotlist[mid].slot) return mid;
+ else if (slot < s->slotlist[mid].slot) top = mid;
+ else bot = mid;
+
+ range = top - bot;
+ mid = bot + (range / 2);
+ }
+
+ if (slot == s->slotlist[top].slot) return top;
+ if (slot == s->slotlist[bot].slot) return bot;
+
+ return ASL_INDEX_NULL;
+}
+
+/* find an xid in the slot list */
+static uint32_t
+slotlist_find(asl_store_t *s, uint64_t xid, uint32_t slot, 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;
+
+ /* special case for xid 0: binary search for slot */
+ if (xid == 0) return slotlist_find_xid0_slot(s, slot);
+
+ 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_insert(asl_store_t *s, uint8_t type, uint32_t slot, uint64_t xid, uint32_t hash)
+{
+ int i, j, k;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->slotlist_count == 0)
+ {
+ s->slotlist = (slot_info_t *)calloc(1, sizeof(slot_info_t));
+ if (s->slotlist == NULL) return ASL_STATUS_NO_MEMORY;
+
+ s->slotlist[0].type = type;
+ s->slotlist[0].slot = slot;
+ s->slotlist[0].xid = xid;
+ s->slotlist[0].hash = hash;
+ s->slotlist_count = 1;
+ if (xid == 0) s->slot_zero_count = 1;
+ return ASL_STATUS_OK;
+ }
+
+ s->slotlist = (slot_info_t *)reallocf(s->slotlist, (s->slotlist_count + 1) * sizeof(slot_info_t));
+ if (s->slotlist == NULL)
+ {
+ s->slotlist_count = 0;
+ s->slot_zero_count = 0;
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ /*
+ * slotlist is sorted in increasing order by xid
+ * there may be multiple xid 0 entries (empty slots) which are further sorted by slot
+ */
+ if (xid == 0)
+ {
+ /* update empty count */
+ s->slot_zero_count++;
+
+ for (i = 0; (i < s->slotlist_count) && (s->slotlist[i].xid == 0); i++)
+ {
+ if (slot <= s->slotlist[i].slot) break;
+ }
+ }
+ else
+ {
+ i = s->slotlist_count - 1;
+ if (xid > s->slotlist[i].xid)
+ {
+ /* append XID at end of slotlist */
+ i++;
+ }
+ else
+ {
+ /* usually we are adding records, so it's likely that the new xid will be large */
+ for (i = s->slotlist_count; i > 0; i--)
+ {
+ if (xid > s->slotlist[i - 1].xid) break;
+ }
+ }
+ }
+
+ for (j = s->slotlist_count; j > i; j--)
+ {
+ k = j - 1;
+ s->slotlist[j].type = s->slotlist[k].type;
+ s->slotlist[j].slot = s->slotlist[k].slot;
+ s->slotlist[j].xid = s->slotlist[k].xid;
+ s->slotlist[j].hash = s->slotlist[k].hash;
+ }
+
+ s->slotlist[i].type = type;
+ s->slotlist[i].slot = slot;
+ s->slotlist[i].xid = xid;
+ s->slotlist[i].hash = hash;
+ s->slotlist_count++;
+
+ return ASL_STATUS_OK;
+}
+
+static uint32_t
+slotlist_delete(asl_store_t *s, uint32_t where)
+{
+ uint32_t i, j, n;
+
+ if (s->slotlist_count == 0) return ASL_STATUS_OK;
+
+ n = s->slotlist_count - 1;
+ if (n == 0)
+ {
+ free(s->slotlist);
+ s->slotlist = NULL;
+ s->slotlist_count = 0;
+ s->slot_zero_count = 0;
+ return ASL_STATUS_OK;
+ }
+
+ if (s->slotlist[where].xid == 0) s->slot_zero_count--;
+
+ for (i = where, j = i + 1; i < n; i++, j++)
+ {
+ s->slotlist[i].type = s->slotlist[j].type;
+ s->slotlist[i].slot = s->slotlist[j].slot;
+ s->slotlist[i].xid = s->slotlist[j].xid;
+ s->slotlist[i].hash = s->slotlist[j].hash;
+ }
+
+ s->slotlist_count = n;
+ s->slotlist = (slot_info_t *)reallocf(s->slotlist, s->slotlist_count * sizeof(slot_info_t));
+
+ if (s->slotlist == NULL)
+ {
+ s->slotlist_count = 0;
+ s->slot_zero_count = 0;
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ return ASL_STATUS_OK;
+}
+
+static uint32_t
+slotlist_make_empty(asl_store_t *s, uint32_t where)
+{
+ uint32_t i, j, slot;
+
+ if (s->slotlist_count == 0) return ASL_STATUS_OK;
+ if (where > s->slotlist_count) return ASL_STATUS_OK;
+
+ /*
+ * Special case for asl_store_archive.
+ * Since we expect to be doing lots of deletions during an archive call,
+ * this routine only marks the type as empty.
+ * asl_store_archive cleans up the slotlist when it is finished.
+ */
+ if (s->flags & ASL_STORE_FLAG_DEFER_SORT)
+ {
+ s->slotlist[where].type = DB_TYPE_EMPTY;
+ s->slotlist[where].hash = 0;
+
+ s->empty_count++;
+
+ return ASL_STATUS_OK;
+ }
+
+ slot = s->slotlist[where].slot;
+
+ /* primary sort by xid */
+ for (i = where, j = where - 1; (i > 0) && (s->slotlist[j].xid != 0); i--, j--)
+ {
+ s->slotlist[i].type = s->slotlist[j].type;
+ s->slotlist[i].slot = s->slotlist[j].slot;
+ s->slotlist[i].xid = s->slotlist[j].xid;
+ s->slotlist[i].hash = s->slotlist[j].hash;
+ }
+
+ /* xid 0 entries sorted by slot */
+ for (j = i - 1; (i > 0) && (s->slotlist[j].slot > slot); i--, j--)
+ {
+ s->slotlist[i].type = s->slotlist[j].type;
+ s->slotlist[i].slot = s->slotlist[j].slot;
+ s->slotlist[i].xid = s->slotlist[j].xid;
+ s->slotlist[i].hash = s->slotlist[j].hash;
+ }
+
+ s->slotlist[i].type = DB_TYPE_EMPTY;
+ s->slotlist[i].slot = slot;
+ s->slotlist[i].xid = 0;
+ s->slotlist[i].hash = 0;
+
+ s->empty_count++;
+
+ /* new xid=0 count */
+ for (s->slot_zero_count = 0; (s->slot_zero_count < s->slotlist_count) && (s->slotlist[s->slot_zero_count].xid == 0); s->slot_zero_count++);
+
+ return ASL_STATUS_OK;
+}
+
+static uint32_t
+slotlist_init(asl_store_t *s)
+{
+ uint32_t i, si, status, hash, addslot;
+ uint64_t xid, tick;
+ uint8_t t;
+ char tmp[DB_RECORD_LEN];
+
+ s->empty_count = 0;
+
+ /* 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 = (slot_info_t *)calloc(s->record_count, sizeof(slot_info_t));
+ if (s->slotlist == NULL) return ASL_STATUS_NO_MEMORY;
+
+ si = 0;
+
+ for (i = 1; i < s->record_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;
+ s->empty_count++;
+ }
+
+ if (t == DB_TYPE_STRING)
+ {
+ addslot = 1;
+ s->string_count++;
+ xid = header_get_id(tmp);
+ hash = header_get_hash(tmp);
+ }
+
+ if (t == DB_TYPE_MESSAGE)
+ {
+ addslot = 1;
+ s->message_count++;
+ xid = header_get_id(tmp);
+ tick = _asl_get_64(tmp + MSG_OFF_KEY_TIME);
+ if (tick > s->max_time) s->max_time = tick;
+ }
+
+ 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 = (slot_info_t *)reallocf(s->slotlist, si * sizeof(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(slot_info_t), slot_comp);
+
+ /* new xid=0 count */
+ for (s->slot_zero_count = 0; (s->slot_zero_count < s->slotlist_count) && (s->slotlist[s->slot_zero_count].xid == 0); s->slot_zero_count++);
+
+ return ASL_STATUS_OK;
+}
+
+uint32_t
+asl_store_open(const char *path, uint32_t flags, asl_store_t **out)
+{
+ asl_store_t *s;
+ struct stat sb;
+ int status, i, j, fd;
+ char cbuf[DB_RECORD_LEN];
+ off_t fsize;
+ uint64_t next;
+
+ memset(&sb, 0, sizeof(struct stat));
+ status = stat(path, &sb);
+
+ fsize = 0;
+
+ if (status < 0)
+ {
+ if (errno != ENOENT) return ASL_STATUS_FAILED;
+
+ fd = open(path, O_RDWR | O_CREAT | O_EXCL, FILE_MODE);
+ if (fd < 0) return ASL_STATUS_FAILED;
+
+ memset(cbuf, 0, DB_RECORD_LEN);
+ memcpy(cbuf, ASL_DB_COOKIE, ASL_DB_COOKIE_LEN);
+
+ _asl_put_32(DB_VERSION, cbuf + DB_HEADER_VERS_OFFSET);
+
+ /* record IDs start at 1 */
+ _asl_put_64(1, cbuf + DB_HEADER_MAXID_OFFSET);
+
+ status = write(fd, cbuf, DB_RECORD_LEN);
+ close(fd);
+ if (status != DB_RECORD_LEN) return ASL_STATUS_FAILED;
+
+ fsize = DB_RECORD_LEN;
+ }
+ else
+ {
+ fsize = sb.st_size;
+ }
+
+ s = (asl_store_t *)calloc(1, sizeof(asl_store_t));
+ if (s == NULL) return ASL_STATUS_NO_MEMORY;
+
+ s->flags = flags;
+
+ for (i = 0; i < RECORD_CACHE_SIZE; i++)
+ {
+ s->rcache[i] = malloc(DB_RECORD_LEN);
+ if (s->rcache[i] == NULL)
+ {
+ for (j = 0; j < i; j++) free(s->rcache[j]);
+ free(s);
+ return ASL_STATUS_NO_MEMORY;
+ }
+ }
+
+ s->db = NULL;
+ if (flags & ASL_STORE_FLAG_READ_ONLY) s->db = fopen(path, "r");
+ else 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;
+ }
+
+ next = 0;
+ memcpy(&next, cbuf + DB_HEADER_MAXID_OFFSET, 8);
+ s->next_id = _asl_ntohq(next);
+
+ s->record_count = fsize / DB_RECORD_LEN;
+
+ status = slotlist_init(s);
+
+ for (i = 0; i < STRING_CACHE_SIZE; i++)
+ {
+ s->string_cache[i].index = ASL_INDEX_NULL;
+ s->string_cache[i].refcount = 0;
+ s->string_cache[i].str = NULL;
+ }
+
+ s->db_path = strdup(path);
+
+ *out = s;
+ return ASL_STATUS_OK;
+}
+
+uint32_t
+asl_store_close(asl_store_t *s)
+{
+ uint32_t i;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+
+ if (s->slotlist != NULL) free(s->slotlist);
+ for (i = 0; i < RECORD_CACHE_SIZE; i++) free(s->rcache[i]);
+ for (i = 0; i < STRING_CACHE_SIZE; i++)
+ {
+ if (s->string_cache[i].str != NULL) free(s->string_cache[i].str);
+ }
+
+ if (s->db_path != NULL) free(s->db_path);
+ if (s->db != NULL) fclose(s->db);
+ free(s);
+
+ return ASL_STATUS_OK;
+}
+
+static char *
+record_buffer_alloc(asl_store_t *s)
+{
+ uint32_t i;
+
+ if (s == NULL) return calloc(1, DB_RECORD_LEN);
+
+ for (i = 0; i < RECORD_CACHE_SIZE; i++)
+ {
+ if (s->rcache_state[i] == 0)
+ {
+ s->rcache_state[i] = 1;
+ memset(s->rcache[i], 0, DB_RECORD_LEN);
+ return s->rcache[i];
+ }
+ }
+
+ return calloc(1, DB_RECORD_LEN);
+}
+
+static void
+record_buffer_free(asl_store_t *s, char *p)
+{
+ uint32_t i;
+
+ if (s == NULL) return free(p);
+
+ for (i = 0; i < RECORD_CACHE_SIZE; i++)
+ {
+ if (s->rcache[i] == p)
+ {
+ s->rcache_state[i] = 0;
+ return;
+ }
+ }
+
+ free(p);
+}
+
+/*
+ * Finds a free (DB_TYPE_EMPTY) record slot.
+ * Returns the index of the free entry in the slotlist.
+ * Returns ASL_INDEX_NULL if no free slots are available (next write should be at end of file).
+ */
+static uint32_t
+get_free_slot(asl_store_t *s)
+{
+ uint32_t i;
+
+ if (s == NULL) return ASL_INDEX_NULL;
+
+ if (s->empty_count == 0) return ASL_INDEX_NULL;
+
+ for (i = 0; i < s->slotlist_count; i++)
+ {
+ if (s->slotlist[i].type == DB_TYPE_EMPTY)
+ {
+ s->empty_count--;
+ return i;
+ }
+ }
+
+ /* impossible */
+ s->empty_count = 0;
+ return ASL_INDEX_NULL;
+}
+
+static void
+record_list_free(asl_store_t *s, char **list)
+{
+ uint32_t i;
+
+ if (list == NULL) return;
+
+ for (i = 0; list[i] != NULL; i++) record_buffer_free(s, list[i]);
+ free(list);
+}
+
+static uint64_t
+new_id(asl_store_t *s)
+{
+ int status;
+ uint64_t n, out;
+
+ if (s == NULL) return ASL_REF_NULL;
+
+ status = fseek(s->db, DB_HEADER_MAXID_OFFSET, SEEK_SET);
+ if (status < 0) return ASL_REF_NULL;
+
+ out = s->next_id;
+ s->next_id++;
+
+ n = _asl_htonq(s->next_id);
+ status = fwrite(&n, 8, 1, s->db);
+ if (status != 1) return ASL_REF_NULL;
+ return out;
+}
+
+/*
+ * Write each record in the list to a slot in the database.
+ * Fills in "next" index.
+ */
+static uint32_t
+save_record_list(asl_store_t *s, char **list, uint32_t *start)
+{
+ uint32_t i, n, status, si, slot, next, rcount, hash;
+ uint8_t type;
+ off_t offset;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+
+ if (list == NULL) return ASL_STATUS_OK;
+
+ for (n = 0; list[n] != NULL; n++);
+
+ if (n == 0) return ASL_STATUS_OK;
+
+ rcount = s->record_count;
+ si = get_free_slot(s);
+
+ /* update slotlist */
+ type = list[0][0];
+
+ if (type == DB_TYPE_STRING) s->string_count++;
+ if (type == DB_TYPE_MESSAGE) s->message_count++;
+
+ next = ASL_INDEX_NULL;
+ if (si == ASL_INDEX_NULL)
+ {
+ next = s->record_count;
+ }
+ else if (si > s->slotlist_count)
+ {
+ return ASL_STATUS_FAILED;
+ }
+ else
+ {
+ next = s->slotlist[si].slot;
+ slotlist_delete(s, si);
+ }
+
+ hash = 0;
+ if (type == DB_TYPE_STRING) hash = header_get_hash(list[0]);
+
+ status = slotlist_insert(s, type, next, header_get_id(list[0]), hash);
+ if (status != ASL_STATUS_OK) return status;
+
+ *start = next;
+
+ for (i = 0; i < n; i++)
+ {
+ slot = next;
+
+ next = 0;
+ if ((i + 1) < n)
+ {
+ si = get_free_slot(s);
+ if (si == ASL_INDEX_NULL)
+ {
+ next = s->record_count + 1;
+ }
+ else if (next > s->slotlist_count)
+ {
+ return ASL_STATUS_FAILED;
+ }
+ else
+ {
+ type = list[i + 1][0];
+ next = s->slotlist[si].slot;
+ slotlist_delete(s, si);
+ }
+ }
+
+ offset = slot * DB_RECORD_LEN;
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0) return ASL_STATUS_WRITE_FAILED;
+
+ header_put_next(next, list[i]);
+
+ status = fwrite(list[i], DB_RECORD_LEN, 1, s->db);
+ if (status != 1) return ASL_STATUS_WRITE_FAILED;
+
+ if (si == ASL_INDEX_NULL) s->record_count++;
+ }
+
+ fflush(s->db);
+
+ return ASL_STATUS_OK;
+}
+
+/*
+ * Converts a string into a NULL-terminated list of records.
+ * Sets sid to new string ID.
+ */
+static uint32_t
+string_encode(asl_store_t *s, uint32_t hash, const char *str, uint64_t *sid, char ***list)
+{
+ char **outlist, *p;
+ const char *t;
+ uint32_t length, remaining, i, n, x;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (str == NULL) return ASL_STATUS_INVALID_STRING;
+
+ *sid = new_id(s);
+ if (*sid == ASL_REF_NULL) return ASL_STATUS_FAILED;
+
+ length = strlen(str) + 1;
+ remaining = length;
+
+ x = DB_RECORD_LEN - DB_HLEN_STRING;
+ if (remaining < x) x = remaining;
+ remaining -= x;
+ n = 1;
+
+ x = DB_RECORD_LEN - DB_HLEN_STRCONT;
+ n += (remaining + x - 1) / x;
+
+ outlist = (char **)calloc(n + 1, sizeof(char *));
+ if (outlist == NULL) return ASL_STATUS_NO_MEMORY;
+
+ for (i = 0; i < n; i++)
+ {
+ outlist[i] = record_buffer_alloc(s);
+ if (outlist[i] == NULL)
+ {
+ n = i;
+ for (i = 0; i < n; i++) record_buffer_free(s, outlist[i]);
+ free(outlist);
+ return ASL_STATUS_NO_MEMORY;
+ }
+ }
+
+ *list = outlist;
+
+ outlist[0][0] = (char)DB_TYPE_STRING;
+ p = outlist[0] + 5;
+
+ /* sid */
+ _asl_put_64(*sid, p);
+ p += 8;
+
+ /* refcount */
+ _asl_put_32(1, p);
+ p += 4;
+
+ /* hash */
+ _asl_put_32(hash, p);
+ p += 4;
+
+ /* string length (includes trailing nul) */
+ _asl_put_32(length, p);
+ p += 4;
+
+ t = str;
+ remaining = length;
+
+ x = DB_RECORD_LEN - DB_HLEN_STRING;
+ if (remaining < x) x = remaining;
+ memcpy(p, t, x);
+
+ t += x;
+ remaining -= x;
+
+ x = DB_RECORD_LEN - DB_HLEN_STRCONT;
+ for (i = 1; i < n; i++)
+ {
+ outlist[i][0] = (char)DB_TYPE_STRCONT;
+ p = outlist[i] + 5;
+
+ if (remaining < x) x = remaining;
+ memcpy(p, t, x);
+
+ t += x;
+ remaining -= x;
+ }
+
+ return ASL_STATUS_OK;
+}
+
+/*
+ * Hash is used to improve string search.
+ */
+uint32_t
+string_hash(const char *s, uint32_t inlen)
+{
+ uint32_t a, b, c, l, len;
+
+ if (s == NULL) return 0;
+
+ l = inlen;
+
+ len = l;
+ a = b = 0x9e3779b9;
+ c = 0;
+
+ while (len >= 12)
+ {
+ a += (s[0] + ((uint32_t)s[1]<<8) + ((uint32_t)s[ 2]<<16) + ((uint32_t)s[ 3]<<24));
+ b += (s[4] + ((uint32_t)s[5]<<8) + ((uint32_t)s[ 6]<<16) + ((uint32_t)s[ 7]<<24));
+ c += (s[8] + ((uint32_t)s[9]<<8) + ((uint32_t)s[10]<<16) + ((uint32_t)s[11]<<24));
+
+ mix(a, b, c);
+
+ s += 12;
+ len -= 12;
+ }
+
+ c += l;
+ switch(len)
+ {
+ case 11: c += ((uint32_t)s[10]<<24);
+ case 10: c += ((uint32_t)s[9]<<16);
+ case 9 : c += ((uint32_t)s[8]<<8);
+
+ case 8 : b += ((uint32_t)s[7]<<24);
+ case 7 : b += ((uint32_t)s[6]<<16);
+ case 6 : b += ((uint32_t)s[5]<<8);
+ case 5 : b += s[4];
+
+ case 4 : a += ((uint32_t)s[3]<<24);
+ case 3 : a += ((uint32_t)s[2]<<16);
+ case 2 : a += ((uint32_t)s[1]<<8);
+ case 1 : a += s[0];
+ }
+
+ mix(a, b, c);
+
+ return c;
+}
+
+/*
+ * Write refcount to database and update string cache.
+ */
+static void
+string_set_refcount(asl_store_t *s, uint32_t index, const char *str, uint32_t refcount)
+{
+ uint32_t slot, i, min, status, v32;
+ off_t offset;
+
+ if (s == NULL) return;
+
+ /* update the database */
+ slot = s->slotlist[index].slot;
+
+ offset = (slot * DB_RECORD_LEN) + 13;
+ status = fseek(s->db, offset, SEEK_SET);
+
+ if (status < 0) return;
+
+ v32 = htonl(refcount);
+ status = fwrite(&v32, 4, 1, s->db);
+
+ min = 0;
+
+ /* if the string is in the string cache, update the refcount there */
+ for (i = 0; i < STRING_CACHE_SIZE; i++)
+ {
+ if (s->string_cache[i].index == index)
+ {
+ s->string_cache[i].refcount = refcount;
+ return;
+ }
+
+ /* locate the minimum refcount while we're looping */
+ if (s->string_cache[i].refcount < s->string_cache[min].refcount) min = i;
+ }
+
+ /* bail out if the refcount is too low */
+ if (s->string_cache[min].refcount > refcount) return;
+
+ /* replace the current minimum */
+ if (s->string_cache[min].str != NULL) free(s->string_cache[min].str);
+
+ s->string_cache[min].index = index;
+ s->string_cache[min].refcount = refcount;
+ s->string_cache[min].str = strdup(str);
+
+ if (s->string_cache[min].str == NULL)
+ {
+ s->string_cache[min].index = ASL_INDEX_NULL;
+ s->string_cache[min].refcount = 0;
+ return;
+ }
+}
+
+static uint32_t
+string_fetch_slot(asl_store_t *s, uint32_t slot, char **out, uint32_t *refcount)
+{
+ 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;
+
+ *refcount = _asl_get_32(tmp + 13);
+
+ 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_store_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, 0);
+ if (i == ASL_INDEX_NULL) return ASL_STATUS_NOT_FOUND;
+
+ return string_fetch_slot(s, s->slotlist[i].slot, out, &ref);
+}
+
+static uint32_t
+check_user_access(int32_t msgu, int32_t u)
+{
+ /* -1 means anyone may read */
+ if (msgu == -1) return ASL_STATUS_OK;
+
+ /* Check for exact match */
+ if (msgu == u) return ASL_STATUS_OK;
+
+ return ASL_STATUS_ACCESS_DENIED;
+}
+
+static uint32_t
+check_group_access(int32_t msgg, int32_t u, int32_t g)
+{
+ int check;
+ uuid_t uu, gu;
+
+ /* -1 means anyone may read */
+ if (msgg == -1) return ASL_STATUS_OK;
+
+ /* Check for exact match */
+ if (msgg == g) return ASL_STATUS_OK;
+
+ /* Check if user (u) is in read group (msgg) */
+ mbr_uid_to_uuid(u, uu);
+ mbr_gid_to_uuid(msgg, gu);
+
+ check = 0;
+ mbr_check_membership(uu, gu, &check);
+ if (check != 0) return ASL_STATUS_OK;
+
+ return ASL_STATUS_ACCESS_DENIED;
+}
+
+static uint32_t
+check_access(int32_t msgu, int32_t msgg, int32_t u, int32_t g, uint16_t flags)
+{
+ uint16_t uset, gset;
+
+ /* root (uid 0) may always read */
+ if (u == 0) return ASL_STATUS_OK;
+
+ uset = flags & ASL_MSG_FLAG_READ_UID_SET;
+ gset = flags & ASL_MSG_FLAG_READ_GID_SET;
+
+ /* if no access controls are set, anyone may read */
+ if ((uset | gset) == 0) return ASL_STATUS_OK;
+
+ /* if only uid is set, then access is only by uid match */
+ if ((uset != 0) && (gset == 0)) return check_user_access(msgu, u);
+
+ /* if only gid is set, then access is only by gid match */
+ if ((uset == 0) && (gset != 0)) return check_group_access(msgg, u, g);
+
+ /* both uid and gid are set - check user, then group */
+ if ((check_user_access(msgu, u)) == ASL_STATUS_OK) return ASL_STATUS_OK;
+ return check_group_access(msgg, u, g);
+}
+
+static uint32_t
+pmsg_fetch(asl_store_t *s, uint32_t slot, int32_t ruid, int32_t rgid, 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);
+
+ status = check_access(msgu, msgg, ruid, rgid, flags);
+ if (status != ASL_STATUS_OK) return status;
+
+ 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_store_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_store_t *s, uint64_t msgid, int32_t ruid, int32_t rgid, 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, 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, ruid, rgid, 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_store_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;
+ }
+
+ status = asl_set((aslmsg)msg, key, val);
+ if (key != NULL) free(key);
+ if (val != NULL) free(val);
+ if (status != 0)
+ {
+ asl_free(msg);
+ return ASL_STATUS_FAILED;
+ }
+ }
+
+ *out = msg;
+ return ASL_STATUS_OK;
+}
+
+/*
+ * Finds string either in the string cache or in the database
+ */
+static uint32_t
+store_string_find(asl_store_t *s, uint32_t hash, const char *str, uint32_t *index, uint32_t *refcount)
+{
+ uint32_t i, status, test;
+ 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 (refcount == NULL) return ASL_STATUS_INVALID_ARG;
+ if (s->slotlist == NULL) return ASL_STATUS_FAILED;
+
+ /* check the cache */
+ for (i = 0; i < STRING_CACHE_SIZE; i++)
+ {
+ if (s->string_cache[i].index == ASL_INDEX_NULL) continue;
+
+ test = s->slotlist[s->string_cache[i].index].hash;
+ if (test != hash) continue;
+
+ if (s->string_cache[i].str == NULL)
+ {
+ /* can't happen, but clean up anyway */
+ s->string_cache[i].index = ASL_INDEX_NULL;
+ s->string_cache[i].refcount = 0;
+ continue;
+ }
+
+ if (strcmp(s->string_cache[i].str, str)) continue;
+
+ /* Bingo */
+ *index = s->string_cache[i].index;
+ *refcount = s->string_cache[i].refcount;
+ return ASL_STATUS_OK;
+ }
+
+ /* 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;
+ *refcount = 0;
+ status = string_fetch_slot(s, s->slotlist[i].slot, &tmp, refcount);
+ 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;
+ }
+
+ *refcount = 0;
+ return ASL_STATUS_FAILED;
+}
+
+/*
+ * Looks up a string ID number.
+ * Creates the string if necessary.
+ * Increments the string refcount.
+ */
+static uint64_t
+string_retain(asl_store_t *s, const char *str, uint32_t create)
+{
+ uint32_t status, hash, index, slot, refcount, len;
+ uint64_t nsid, sid;
+ char **recordlist, *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;
+ refcount = 0;
+
+ 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 = string_hash(str, len);
+
+ /* check the database */
+ status = store_string_find(s, hash, str, &index, &refcount);
+ if (status == ASL_STATUS_OK)
+ {
+ if (index == ASL_INDEX_NULL) return ASL_REF_NULL;
+ if (create == 0) return s->slotlist[index].xid;
+
+ refcount++;
+ string_set_refcount(s, index, str, refcount);
+ return s->slotlist[index].xid;
+ }
+
+ if (create == 0) return ASL_REF_NULL;
+
+ /* create the string */
+ recordlist = NULL;
+ status = string_encode(s, hash, str, &sid, &recordlist);
+ if (status != ASL_STATUS_OK) return ASL_REF_NULL;
+ if (recordlist == NULL) return ASL_REF_NULL;
+
+ status = save_record_list(s, recordlist, &slot);
+ record_list_free(s, recordlist);
+ if (status != ASL_STATUS_OK) return status;
+
+ return sid;
+}
+
+static uint32_t
+record_chain_free(asl_store_t *s, uint64_t xid, uint32_t slot, uint8_t type)
+{
+ uint32_t status, next, where;
+ off_t offset;
+ char zdb[DB_RECORD_LEN];
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+
+ if ((type == DB_TYPE_STRING) && (s->string_count > 0)) s->string_count--;
+ if ((type == DB_TYPE_MESSAGE) && (s->message_count > 0)) s->message_count--;
+
+ memset(zdb, 0, DB_RECORD_LEN);
+
+ /*
+ * Walk the chain and mark each slot as free.
+ *
+ * This is tricky:
+ * We need to know the index in the slot list for each slot used in the record.
+ * We are given the xid for the record, which we pass to slotlist_find
+ * to get the index of the first slot. The slotlist entries for all subsequent
+ * slots will have xid 0, since they are of type DB_TYPE_KVLIST or DB_TYPE_STRCONT.
+ * Since slotlist has a secondary sort by slot, we can do a binary search within the
+ * xid 0 entries with slotlist_find to get the slotlist index of those slots.
+ */
+ where = slotlist_find(s, xid, 0, 0);
+
+ next = slot;
+ while (next != 0)
+ {
+ /* update slotlist */
+ slotlist_make_empty(s, where);
+
+ offset = next * DB_RECORD_LEN;
+
+ status = fseek(s->db, offset + 1, SEEK_SET);
+ if (status < 0) return ASL_STATUS_WRITE_FAILED;
+
+ status = fread(&next, 4, 1, s->db);
+ if (status != 1) return ASL_STATUS_WRITE_FAILED;
+ next = ntohl(next);
+
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0) return ASL_STATUS_WRITE_FAILED;
+
+ status = fwrite(zdb, DB_RECORD_LEN, 1, s->db);
+ if (status != 1) return ASL_STATUS_WRITE_FAILED;
+
+ if (next != 0) where = slotlist_find_xid0_slot(s, next);
+ }
+
+ return ASL_STATUS_OK;
+}
+
+/*
+ * Removes records.
+ *
+ * Decrements string refcount.
+ * Removes string if refcount becomes zero.
+ */
+static uint32_t
+id_release(asl_store_t *s, uint64_t xid, uint32_t slot, uint8_t type)
+{
+ uint32_t status, refcount, v32;
+ uint64_t x;
+ char head[17];
+ off_t offset;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (xid == ASL_REF_NULL) return ASL_STATUS_INVALID_ID;
+ if (slot == ASL_INDEX_NULL) return ASL_STATUS_INVALID_ARG;
+
+ /* Note that record_chain_free() updates slotlist */
+
+ offset = slot * DB_RECORD_LEN;
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0) return ASL_STATUS_WRITE_FAILED;
+
+ status = fread(head, 17, 1, s->db);
+ if (status != 1) return ASL_STATUS_WRITE_FAILED;
+
+ if (head[0] != type) return ASL_STATUS_FAILED;
+
+ x = header_get_id(head);
+
+ if (x != xid) return ASL_STATUS_FAILED;
+
+ /* small kludge: only strings are refcounted */
+ refcount = 1;
+ if (type == DB_TYPE_STRING) refcount = header_get_refcount(head);
+
+ refcount--;
+ if (refcount == 0)
+ {
+ return record_chain_free(s, xid, slot, type);
+ }
+ else
+ {
+ offset += 13;
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0) return ASL_STATUS_WRITE_FAILED;
+
+ v32 = htonl(refcount);
+ status = fwrite(&v32, 4, 1, s->db);
+ if (status != 1) return ASL_STATUS_WRITE_FAILED;
+
+ return ASL_STATUS_OK;
+ }
+}
+
+static uint32_t
+string_release(asl_store_t *s, uint64_t sid)
+{
+ uint32_t i;
+
+ i = slotlist_find(s, sid, 0, 0);
+ if (i == ASL_INDEX_NULL) return ASL_STATUS_INVALID_ID;
+
+ return id_release(s, sid, s->slotlist[i].slot, DB_TYPE_STRING);
+}
+
+static uint32_t
+message_release(asl_store_t *s, uint64_t xid)
+{
+ uint32_t i, slot, status;
+ pmsg_t *pmsg;
+
+ pmsg = NULL;
+ slot = ASL_INDEX_NULL;
+
+ /* read message and release strings */
+ status = pmsg_fetch_by_id(s, xid, 0, 0, &pmsg, &slot);
+ if (status != ASL_STATUS_OK) return status;
+ if (pmsg == NULL) return ASL_STATUS_READ_FAILED;
+
+ string_release(s, pmsg->host);
+ string_release(s, pmsg->sender);
+ string_release(s, pmsg->facility);
+ string_release(s, pmsg->message);
+ for (i = 0; i < pmsg->kvcount; i++) string_release(s, pmsg->kvlist[i]);
+ free_pmsg(pmsg);
+
+ return id_release(s, xid, slot, DB_TYPE_MESSAGE);
+}
+
+/*
+ * Convert msg into a database record (or list of records if additional key/value pairs are present).
+ * Returns a NULL-terminated list of records.
+ *
+ * Sets the message access control flags as follows:
+ * If ruid is specified (anthing other than -1), then we use that as the ReadUID and set the uid access flag
+ * Else if msg contains a ReadUID, we use that as the ReadUID and set the uid access flag
+ * Else ReadUID is -1 and we don't set the uid access flag.
+ * Same logic for ReadGID.
+ */
+static uint32_t
+message_encode(asl_store_t *s, asl_msg_t *msg, int32_t ruid, int32_t rgid, uint64_t *msgid, char ***list)
+{
+ char **outlist, *std, *kvl, *p;
+ uint32_t i, kvcount, kvn, len;
+ uint32_t level;
+ uint16_t flags;
+ int32_t pid, uid, gid, muid, mgid;
+ uint64_t time_val, host_sid, sender_sid, facility_sid, message_sid, k, v;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (msg == NULL) return ASL_STATUS_INVALID_MESSAGE;
+ if (list == NULL) return ASL_STATUS_INVALID_ARG;
+
+ len = 2;
+
+ outlist = (char **)calloc(len, sizeof(char *));
+ if (outlist == NULL) return ASL_STATUS_NO_MEMORY;
+
+ std = record_buffer_alloc(s);
+ if (std == NULL)
+ {
+ free(outlist);
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ *msgid = new_id(s);
+ if (*msgid == ASL_REF_NULL)
+ {
+ free(outlist);
+ free(std);
+ return ASL_STATUS_FAILED;
+ }
+
+ flags = 0;
+
+ muid = -1;
+ if (ruid != -1)
+ {
+ muid = ruid;
+ flags |= ASL_MSG_FLAG_READ_UID_SET;
+ }
+
+ mgid = -1;
+ if (rgid != -1)
+ {
+ mgid = rgid;
+ flags |= ASL_MSG_FLAG_READ_GID_SET;
+ }
+
+ outlist[0] = std;
+
+ flags = 0;
+ level = ASL_INDEX_NULL;
+ pid = -1;
+ uid = -2;
+ gid = -2;
+ host_sid = ASL_REF_NULL;
+ sender_sid = ASL_REF_NULL;
+ facility_sid = ASL_REF_NULL;
+ message_sid = ASL_REF_NULL;
+ time_val = ASL_REF_NULL;
+
+ kvcount = 0;
+ kvn = 0;
+ kvl = NULL;
+ p = NULL;
+
+ for (i = 0; i < msg->count; i++)
+ {
+ if (msg->key[i] == NULL) continue;
+
+ else if (!strcmp(msg->key[i], ASL_KEY_TIME))
+ {
+ if (msg->val[i] != NULL) time_val = asl_parse_time(msg->val[i]);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_HOST))
+ {
+ if (msg->val[i] != NULL) host_sid = string_retain(s, msg->val[i], 1);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_SENDER))
+ {
+ if (msg->val[i] != NULL) sender_sid = string_retain(s, msg->val[i], 1);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_PID))
+ {
+ if (msg->val[i] != NULL) pid = atoi(msg->val[i]);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_UID))
+ {
+ if (msg->val[i] != NULL) uid = atoi(msg->val[i]);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_GID))
+ {
+ if (msg->val[i] != NULL) gid = atoi(msg->val[i]);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_LEVEL))
+ {
+ if (msg->val[i] != NULL) level = atoi(msg->val[i]);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_MSG))
+ {
+ if (msg->val[i] != NULL) message_sid = string_retain(s, msg->val[i], 1);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_FACILITY))
+ {
+ if (msg->val[i] != NULL) facility_sid = string_retain(s, msg->val[i], 1);
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_READ_UID))
+ {
+ if (((flags & ASL_MSG_FLAG_READ_UID_SET) == 0) && (msg->val[i] != NULL))
+ {
+ muid = atoi(msg->val[i]);
+ flags |= ASL_MSG_FLAG_READ_UID_SET;
+ }
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_READ_GID))
+ {
+ if (((flags & ASL_MSG_FLAG_READ_GID_SET) == 0) && (msg->val[i] != NULL))
+ {
+ mgid = atoi(msg->val[i]);
+ flags |= ASL_MSG_FLAG_READ_GID_SET;
+ }
+ }
+ else if (!strcmp(msg->key[i], ASL_KEY_MSG_ID))
+ {
+ /* Ignore */
+ continue;
+ }
+ else
+ {
+ k = string_retain(s, msg->key[i], 1);
+ if (k == ASL_REF_NULL) continue;
+
+ v = ASL_REF_NULL;
+ if (msg->val[i] != NULL) v = string_retain(s, msg->val[i], 1);
+
+ if (kvl == NULL)
+ {
+ outlist = (char **)reallocf(outlist, (len + 1) * sizeof(char *));
+ if (outlist == NULL)
+ {
+ free(std);
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ kvl = record_buffer_alloc(s);
+ if (kvl == NULL)
+ {
+ record_list_free(s, outlist);
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ kvl[0] = DB_TYPE_KVLIST;
+ p = kvl + 9;
+
+ outlist[len - 1] = kvl;
+ outlist[len] = NULL;
+ len++;
+ }
+
+ kvcount++;
+
+ _asl_put_64(k, p);
+ kvn++;
+ p += 8;
+
+ _asl_put_64(v, p);
+ kvn++;
+ p += 8;
+
+ if (kvn >= 8)
+ {
+ kvl = NULL;
+ kvn = 0;
+ }
+ }
+ }
+
+ /* encode kvcount in first kvlist record */
+ if (kvcount > 0)
+ {
+ kvl = outlist[1];
+ _asl_put_32(kvcount, kvl + 5);
+ }
+
+ /* encode std */
+ std[0] = DB_TYPE_MESSAGE;
+ p = std + 5;
+
+ _asl_put_64(*msgid, p);
+ p += 8;
+
+ _asl_put_32(muid, p);
+ p += 4;
+
+ _asl_put_32(mgid, p);
+ p += 4;
+
+ _asl_put_64(time_val, p);
+ p += 8;
+
+ _asl_put_64(host_sid, p);
+ p += 8;
+
+ _asl_put_64(sender_sid, p);
+ p += 8;
+
+ _asl_put_64(facility_sid, p);
+ p += 8;
+
+ _asl_put_32(level, p);
+ p += 4;
+
+ _asl_put_32(pid, p);
+ p += 4;
+
+ _asl_put_32(uid, p);
+ p += 4;
+
+ _asl_put_32(gid, p);
+ p += 4;
+
+ _asl_put_64(message_sid, p);
+ p += 8;
+
+ _asl_put_16(flags, p);
+ p += 4;
+
+ *list = outlist;
+
+ return ASL_STATUS_OK;
+}
+
+uint32_t
+asl_store_save(asl_store_t *s, asl_msg_t *msg, int32_t ruid, int32_t rgid, uint64_t *msgid)
+{
+ char **list;
+ uint32_t status, slot;
+ uint64_t tick;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->flags & ASL_STORE_FLAG_READ_ONLY) return ASL_STATUS_READ_ONLY;
+
+ list = NULL;
+ status = message_encode(s, msg, ruid, rgid, msgid, &list);
+ if ((status != ASL_STATUS_OK) || (list == NULL)) return status;
+
+ slot = 0;
+ status = save_record_list(s, list, &slot);
+ tick = _asl_get_64(list[0] + MSG_OFF_KEY_TIME);
+
+ /* if time has gone backwards, unset the flag */
+ if (tick < s->max_time) s->flags &= ~ASL_STORE_FLAG_TIME_SORTED;
+ else s->max_time = tick;
+
+ record_list_free(s, list);
+
+ return status;
+}
+
+uint32_t
+asl_store_remove(asl_store_t *s, uint64_t msgid)
+{
+ uint32_t status;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->flags & ASL_STORE_FLAG_READ_ONLY) return ASL_STATUS_READ_ONLY;
+
+ status = message_release(s, msgid);
+ return status;
+}
+
+uint32_t
+asl_store_fetch(asl_store_t *s, uint64_t msgid, int32_t ruid, int32_t rgid, 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, ruid, rgid, &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_store_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_retain(s, q->val[i], 0);
+ 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_retain(s, q->val[i], 0);
+ 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_retain(s, q->val[i], 0);
+ 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_retain(s, q->val[i], 0);
+ 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_retain(s, q->key[i], 0);
+ 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_retain(s, q->val[i], 0);
+ 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;
+}
+
+uint32_t
+msg_match(asl_store_t *s, uint32_t qtype, pmsg_t *qp, asl_msg_t *q, int32_t ruid, int32_t rgid, 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, ruid, rgid, 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, ruid, rgid, 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, ruid, rgid, 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, ruid, rgid, 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_store_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_store_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_INVALID_ARG;
+ if (query->msg == NULL) return ASL_STATUS_INVALID_ARG;
+ 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_store_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_store_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, int32_t ruid, int32_t rgid)
+{
+ 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, 0, 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, ruid, rgid, 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_ACCESS_DENIED)
+ {
+ si = next_search_slot(s, si, direction);
+ continue;
+ }
+ else 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], ruid, rgid, slot, &iopmsg, &iomsg, res, &didmatch);
+ if (status == ASL_STATUS_ACCESS_DENIED) break;
+ else 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_store_match(asl_store_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, int32_t ruid, int32_t rgid)
+{
+ uint32_t idcount;
+
+ idcount = 0;
+ return match_worker(s, query, res, last_id, NULL, &idcount, start_id, count, direction, ruid, rgid);
+}
+
+uint32_t
+asl_store_prune(asl_store_t *s, asl_msg_list_t *prune)
+{
+ uint64_t *idlist, max_id;
+ uint32_t status, i, idcount;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->flags & ASL_STORE_FLAG_READ_ONLY) return ASL_STATUS_READ_ONLY;
+
+ if (prune == NULL) return ASL_STATUS_OK;
+
+ idlist = NULL;
+ idcount = 0;
+ max_id = 0;
+
+ status = match_worker(s, prune, NULL, &max_id, &idlist, &idcount, 0, 0, 1, 0, 0);
+ if (status != ASL_STATUS_OK)
+ {
+ if (idlist != NULL) free(idlist);
+ return status;
+ }
+
+ for (i = 0; i < idcount; i++) message_release(s, idlist[i]);
+ if (idlist != NULL) free(idlist);
+
+ return ASL_STATUS_OK;
+}
+
+/*
+ * Compact the database.
+ * Removes NULL and EMPTY records by copying records to the front of the file.
+ */
+uint32_t
+asl_store_compact(asl_store_t *s)
+{
+ char tmp[DB_RECORD_LEN];
+ int status;
+ uint8_t t;
+ uint32_t i, j, nrecords, next, slcount, old_slcount, *record_map;
+ off_t offset;
+ slot_info_t *old_slot_list;
+ size_t vmrecord_map_len, vmslot_list_len;
+ void *vmrecord_map, *vmslot_list;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->flags & ASL_STORE_FLAG_READ_ONLY) return ASL_STATUS_READ_ONLY;
+
+ status = fseek(s->db, DB_RECORD_LEN, SEEK_SET);
+ if (status < 0) return ASL_STATUS_READ_FAILED;
+
+ /*
+ * record map is a mapping from pre-compaction record number to post-compaction record number.
+ * We allocate it in VM rather than on the malloc heap to keep from creating a lot of
+ * empty pages.
+ */
+ nrecords = s->record_count;
+
+ vmrecord_map_len = nrecords * sizeof(uint32_t);
+ vmrecord_map = mmap(0, vmrecord_map_len, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+
+ record_map = (uint32_t *)vmrecord_map;
+ if (record_map == NULL) return ASL_STATUS_NO_MEMORY;
+
+ record_map[0] = 0;
+
+ /* size of post-compaction slotlist */
+ slcount = 0;
+
+ /* first pass: create the record map (N.B. starting at 1 skips the header) */
+ for (i = 1, j = 1; i < nrecords; i++)
+ {
+ record_map[i] = 0;
+
+ status = fread(tmp, DB_RECORD_LEN, 1, s->db);
+ if (status != 1)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_READ_FAILED;
+ }
+
+ t = tmp[0];
+
+ if (t == DB_TYPE_HEADER)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_INVALID_STORE;
+ }
+
+ /*
+ * Only messages, kvlists, strings, and string continuations get copied.
+ * Empty, null, and unrecognized record types (i.e. corruption in the database)
+ * are skipped. This compresses out gaps and deletes bad records.
+ */
+ if ((t != DB_TYPE_MESSAGE) && (t != DB_TYPE_KVLIST) && (t != DB_TYPE_STRING) && (t != DB_TYPE_STRCONT)) continue;
+
+ /* count to get size of new slotlist */
+ if ((t == DB_TYPE_STRING) || (t == DB_TYPE_MESSAGE)) slcount++;
+
+ record_map[i] = j++;
+ }
+
+ /* second pass: copy records and fix "next" indexes */
+ for (i = 1; i < nrecords; i++)
+ {
+ offset = i * DB_RECORD_LEN;
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_READ_FAILED;
+ }
+
+ status = fread(tmp, DB_RECORD_LEN, 1, s->db);
+ if (status != 1)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_READ_FAILED;
+ }
+
+ t = tmp[0];
+
+ /* only copy messages, kvlists, strings, and string continuations */
+ if ((t != DB_TYPE_MESSAGE) && (t != DB_TYPE_KVLIST) && (t != DB_TYPE_STRING) && (t != DB_TYPE_STRCONT)) continue;
+
+ next = _asl_get_32(tmp + 1);
+
+ if (next > nrecords) next = 0;
+ else next = record_map[next];
+
+ _asl_put_32(next, tmp + 1);
+
+ offset = record_map[i] * DB_RECORD_LEN;
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_READ_FAILED;
+ }
+
+ status = fwrite(tmp, DB_RECORD_LEN, 1, s->db);
+ if (status != 1)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_WRITE_FAILED;
+ }
+ }
+
+ /* truncate file */
+ s->record_count = j;
+ offset = s->record_count * DB_RECORD_LEN;
+
+ status = fseek(s->db, 0, SEEK_SET);
+ if (status < 0)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_READ_FAILED;
+ }
+
+ status = ftruncate(fileno(s->db), offset);
+ if (status != 0)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_WRITE_FAILED;
+ }
+
+ /*
+ * build new slotlist
+ *
+ * We start by allocating and copying the old slotlist into VM.
+ * Then we realloc the old slotlist to become the new slotlist.
+ * Then we build the new slotlist from the values in VM.
+ * Finally we deallocate the VM.
+ * This is done so that we don't create a large malloc heap.
+ */
+
+ vmslot_list_len = s->slotlist_count * sizeof(slot_info_t);
+
+ vmslot_list = mmap(0, vmslot_list_len, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+ old_slot_list = (slot_info_t *)vmslot_list;
+ if (old_slot_list == NULL)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ old_slcount = s->slotlist_count;
+
+ /* copy old values to VM */
+ for (i = 0; i < s->slotlist_count; i++)
+ {
+ old_slot_list[i].type = s->slotlist[i].type;
+ old_slot_list[i].slot = s->slotlist[i].slot;
+ old_slot_list[i].xid = s->slotlist[i].xid;
+ old_slot_list[i].hash = s->slotlist[i].hash;
+ }
+
+ s->slotlist = (slot_info_t *)reallocf(s->slotlist, slcount * sizeof(slot_info_t));
+ if (s->slotlist == NULL)
+ {
+ munmap(vmrecord_map, vmrecord_map_len);
+ munmap(vmslot_list, vmslot_list_len);
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ s->slotlist_count = slcount;
+
+ /* create the new compacted slotlist */
+ for (i = 0, j = 0; i < old_slcount; i++)
+ {
+ t = old_slot_list[i].type;
+ if ((t == DB_TYPE_STRING) || (t == DB_TYPE_MESSAGE))
+ {
+ s->slotlist[j].type = t;
+ s->slotlist[j].slot = record_map[old_slot_list[i].slot];
+ s->slotlist[j].xid = old_slot_list[i].xid;
+ s->slotlist[j].hash = old_slot_list[i].hash;
+ j++;
+ }
+ }
+
+ munmap(vmslot_list, vmslot_list_len);
+
+ s->empty_count = 0;
+
+ /* fix string cache index (which indexes into slotlist) */
+ for (i = 0; i < STRING_CACHE_SIZE; i++)
+ {
+ if (s->string_cache[i].index == ASL_INDEX_NULL) continue;
+ s->string_cache[i].index = record_map[s->string_cache[i].index];
+ }
+
+ /* new xid=0 count */
+ for (s->slot_zero_count = 0; (s->slot_zero_count < s->slotlist_count) && (s->slotlist[s->slot_zero_count].xid == 0); s->slot_zero_count++);
+
+ munmap(vmrecord_map, vmrecord_map_len);
+
+ return ASL_STATUS_OK;
+}
+
+static uint32_t
+write_to_archive(asl_store_t *s, asl_store_t *a, uint64_t msgid)
+{
+ uint32_t status;
+ uint64_t xid;
+ aslmsg msg;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (a == NULL) return ASL_STATUS_OK;
+
+ status = asl_store_fetch(s, msgid, 0, 0, &msg);
+ if (status != ASL_STATUS_OK) return status;
+
+ status = asl_store_save(a, msg, -1, -1, &xid);
+ asl_free(msg);
+ return status;
+}
+
+static uint64_t
+oldest_id(asl_store_t *s)
+{
+ uint32_t si;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+
+ si = next_search_slot(s, ASL_INDEX_NULL, 1);
+ if (si == ASL_INDEX_NULL) return ASL_REF_NULL;
+
+ return s->slotlist[si].xid;
+}
+
+/*
+ * Archive/remove oldest messages to make the database <= max_size
+ * This is slow - messages are removed one at a time.
+ */
+uint32_t
+asl_store_truncate(asl_store_t *s, uint64_t max_size, const char *archive)
+{
+ uint32_t max_slots, curr_used;
+ uint32_t status;
+ uint64_t old;
+ asl_store_t *a;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->flags & ASL_STORE_FLAG_READ_ONLY) return ASL_STATUS_READ_ONLY;
+
+ if (max_size == 0) return ASL_STATUS_OK;
+
+ a = NULL;
+
+ max_slots = (max_size + DB_RECORD_LEN - 1) / DB_RECORD_LEN;
+ curr_used = s->record_count - s->empty_count;
+
+ if ((curr_used > max_slots) && (archive != NULL))
+ {
+ status = asl_store_open(archive, 0, &a);
+ if (status != ASL_STATUS_OK) return status;
+ }
+
+ while (curr_used > max_slots)
+ {
+ old = oldest_id(s);
+ if (old == ASL_REF_NULL) return ASL_STATUS_FAILED;
+
+ if (archive != NULL)
+ {
+ status = write_to_archive(s, a, old);
+ if (status != ASL_STATUS_OK) return status;
+ }
+
+ status = message_release(s, old);
+ if (status != ASL_STATUS_OK) return status;
+
+ curr_used = s->record_count - s->empty_count;
+ }
+
+ if (archive != NULL) asl_store_close(a);
+
+ status = asl_store_compact(s);
+ return status;
+}
+
+static uint32_t
+archive_time_worker(asl_store_t *s, uint64_t cut_time, uint64_t **idlist, uint16_t **flags, uint32_t *idcount)
+{
+ uint32_t si, slot, status, check_sort;
+ uint64_t xid, t, lastt;
+ uint16_t rflags;
+ char tmp[DB_RECORD_LEN];
+ off_t offset;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (idlist == NULL) return ASL_STATUS_INVALID_ARG;
+ if (flags == NULL) return ASL_STATUS_INVALID_ARG;
+ if (idcount == NULL) return ASL_STATUS_INVALID_ARG;
+
+ *idlist = NULL;
+ *flags = NULL;
+ *idcount = 0;
+ si = ASL_INDEX_NULL;
+
+ lastt = 0;
+ check_sort = 1;
+
+ /*
+ * loop through records
+ *
+ * Note that next_search_slot() traverses slotlist, which is sorted by id numder.
+ * If the ASL_STORE_FLAG_TIME_SORTED flag is not set, we must search the whole database.
+ * If the flag is set, timestamps will increase with xid, so we stop when we get
+ * a message with time > cut_time.
+ */
+ forever
+ {
+ si = next_search_slot(s, si, 1);
+ if (si == ASL_INDEX_NULL) break;
+
+ slot = s->slotlist[si].slot;
+ xid = s->slotlist[si].xid;
+
+ 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;
+
+ t = _asl_get_64(tmp + MSG_OFF_KEY_TIME);
+
+ if (lastt > t) check_sort = 0;
+
+ if (t > cut_time)
+ {
+ if (s->flags & ASL_STORE_FLAG_TIME_SORTED) return ASL_STATUS_OK;
+ continue;
+ }
+
+ rflags = _asl_get_16(tmp + MSG_OFF_KEY_FLAGS);
+
+ if (*idlist == NULL)
+ {
+ *idlist = (uint64_t *)calloc(1, sizeof(uint64_t));
+ *flags = (uint16_t *)calloc(1, sizeof(uint16_t));
+ }
+ else
+ {
+ *idlist = (uint64_t *)reallocf(*idlist, (*idcount + 1) * sizeof(uint64_t));
+ *flags = (uint16_t *)reallocf(*flags, (*idcount + 1) * sizeof(uint16_t));
+ }
+
+ if (*idlist == NULL)
+ {
+ if (*flags != NULL) free(*flags);
+ *flags = NULL;
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ if (*flags == NULL)
+ {
+ if (*idlist != NULL) free(*idlist);
+ *idlist = NULL;
+ return ASL_STATUS_NO_MEMORY;
+ }
+
+ (*idlist)[*idcount] = xid;
+ (*flags)[*idcount] = rflags;
+ (*idcount)++;
+ }
+
+ /* if timestamps increase with xid, set the flag to improve subsequent search performance */
+ if (check_sort == 1) s->flags |= ASL_STORE_FLAG_TIME_SORTED;
+
+ return ASL_STATUS_OK;
+}
+
+static uint32_t
+archive_time_inverse(asl_store_t *s, uint64_t cut_time, uint64_t **idlist, uint32_t *idcount)
+{
+ uint32_t si, slot, status;
+ uint64_t xid, t, lastt;
+ char tmp[DB_RECORD_LEN];
+ off_t offset;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (idlist == NULL) return ASL_STATUS_INVALID_ARG;
+ if (idcount == NULL) return ASL_STATUS_INVALID_ARG;
+
+ *idlist = NULL;
+ *idcount = 0;
+ si = ASL_INDEX_NULL;
+
+ lastt = 0;
+
+ /*
+ * loop through records
+ */
+ forever
+ {
+ si = next_search_slot(s, si, 1);
+ if (si == ASL_INDEX_NULL) break;
+
+ slot = s->slotlist[si].slot;
+ xid = s->slotlist[si].xid;
+
+ 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;
+
+ t = _asl_get_64(tmp + MSG_OFF_KEY_TIME);
+
+ if (t <= cut_time) continue;
+
+ 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) return ASL_STATUS_NO_MEMORY;
+
+
+ (*idlist)[*idcount] = xid;
+ (*idcount)++;
+ }
+
+ return ASL_STATUS_OK;
+}
+
+static uint32_t
+archive_release(asl_store_t *s, uint64_t xid, uint64_t cut_time, uint64_t expire_ref)
+{
+ uint32_t i, slot, status;
+ uint16_t rflags;
+ pmsg_t *pmsg;
+ uint64_t expire_time;
+ char *str, tmp[DB_RECORD_LEN];
+ off_t offset;
+
+ pmsg = NULL;
+ slot = ASL_INDEX_NULL;
+
+ /* read message and release strings */
+ status = pmsg_fetch_by_id(s, xid, 0, 0, &pmsg, &slot);
+ if (status != ASL_STATUS_OK) return status;
+ if (pmsg == NULL) return ASL_STATUS_READ_FAILED;
+
+ if (expire_ref != ASL_REF_NULL)
+ {
+ for (i = 0; i < pmsg->kvcount; i += 2)
+ {
+ if (pmsg->kvlist[i] == expire_ref)
+ {
+ str = NULL;
+ status = string_fetch_sid(s, pmsg->kvlist[i + 1], &str);
+ if (status != ASL_STATUS_OK) return status;
+ if (str != NULL)
+ {
+ expire_time = 0;
+ /* relative time not allowed - that would be cheating! */
+ if (str[0] != '+') expire_time = asl_parse_time(str);
+ free(str);
+
+ if (expire_time > cut_time)
+ {
+ /* expires in the future - mark as "do not archive" and don't release */
+ free_pmsg(pmsg);
+
+ 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;
+
+ rflags = _asl_get_16(tmp + MSG_OFF_KEY_FLAGS);
+ if ((rflags & ASL_MSG_FLAG_DO_NOT_ARCHIVE) == 0)
+ {
+ rflags |= ASL_MSG_FLAG_DO_NOT_ARCHIVE;
+ _asl_put_16(rflags, tmp + MSG_OFF_KEY_FLAGS);
+
+ status = fseek(s->db, offset, SEEK_SET);
+ if (status < 0) return ASL_STATUS_WRITE_FAILED;
+
+ status = fwrite(tmp, DB_RECORD_LEN, 1, s->db);
+ if (status != 1) return ASL_STATUS_WRITE_FAILED;
+ }
+
+ return ASL_STATUS_OK;
+ }
+ }
+ }
+ }
+ }
+
+ string_release(s, pmsg->host);
+ string_release(s, pmsg->sender);
+ string_release(s, pmsg->facility);
+ string_release(s, pmsg->message);
+ for (i = 0; i < pmsg->kvcount; i++) string_release(s, pmsg->kvlist[i]);
+ free_pmsg(pmsg);
+
+ return id_release(s, xid, slot, DB_TYPE_MESSAGE);
+}
+
+static char *
+asl_store_mk_tmp_path()
+{
+ char tmp[PATH_MAX], *path;
+
+ if (confstr(_CS_DARWIN_USER_TEMP_DIR, tmp, sizeof(tmp)) <= 0) return NULL;
+
+ path = NULL;
+ asprintf(&path, "%sasl.%d.tmp", tmp, getpid());
+ return path;
+}
+
+/*
+ * Moves messages added at or before cut_time to an archive,
+ * or delete them if archive_name is NULL.
+ */
+uint32_t
+asl_store_archive(asl_store_t *s, uint64_t cut_time, const char *archive_name)
+{
+ asl_store_t *archive, *newstore;
+ char *path, *newmapped;
+ uint16_t *flags;
+ uint32_t status, i, archive_count, save_count;
+ uint64_t expire_ref, *archive_list, *save_list;
+ size_t dbsize;
+
+ if (s == NULL) return ASL_STATUS_INVALID_STORE;
+ if (s->flags & ASL_STORE_FLAG_READ_ONLY) return ASL_STATUS_READ_ONLY;
+
+ if (cut_time == 0) return ASL_STATUS_OK;
+
+ archive_count = 0;
+ archive_list = NULL;
+ save_count = 0;
+ save_list = NULL;
+ flags = NULL;
+
+ s->flags = 0;
+
+ status = archive_time_worker(s, cut_time, &archive_list, &flags, &archive_count);
+ if (status != ASL_STATUS_OK) return status;
+
+ if ((archive_list == NULL) || (archive_count == 0))
+ {
+ if (archive_list != NULL) free(archive_list);
+ return ASL_STATUS_OK;
+ }
+
+ archive = NULL;
+ if (archive_name != NULL)
+ {
+ status = asl_store_open(archive_name, 0, &archive);
+ if (status != ASL_STATUS_OK) return status;
+ }
+
+ if (archive != NULL)
+ {
+ for (i = 0; i < archive_count; i++)
+ {
+ if (flags[i] & ASL_MSG_FLAG_DO_NOT_ARCHIVE) continue;
+
+ status = write_to_archive(s, archive, archive_list[i]);
+ if (status != ASL_STATUS_OK)
+ {
+ free(archive_list);
+ asl_store_close(archive);
+ return status;
+ }
+ }
+
+ asl_store_close(archive);
+ }
+
+ /*
+ * Deleting large numbers of records is slow.
+ * If the number of records to be deleted is at least 1000, and
+ * is ARCHIVE_DELETE_VS_COPY_PERCENT or above, we copy the records
+ * that should remain to a temporary archive, then replace the
+ * database with the temporary one.
+ * Note that we need to know the name of the current DB file.
+ */
+ path = NULL;
+ if ((archive_count >= 1000) && (((archive_count * 100) / s->message_count) >= ARCHIVE_DELETE_VS_COPY_PERCENT) && (s->db_path != NULL)) path = asl_store_mk_tmp_path();
+ if (path != NULL)
+ {
+ status = unlink(path);
+ if ((status != 0) && (errno != ENOENT))
+ {
+ free(path);
+ path = NULL;
+ }
+ }
+
+ if (path != NULL)
+ {
+ if (archive_list != NULL) free(archive_list);
+ archive_list = NULL;
+ archive_count = 0;
+
+ newstore = NULL;
+ status = asl_store_open(path, 0, &newstore);
+ free(path);
+ path = NULL;
+ if (status != ASL_STATUS_OK) return status;
+
+ /* Set the next_id so that the archive will have ids bigger than the current archive. */
+ newstore->next_id = s->next_id;
+
+ /* get a list of records that we want to keep */
+ status = archive_time_inverse(s, cut_time, &save_list, &save_count);
+ if (status != ASL_STATUS_OK)
+ {
+ asl_store_close(newstore);
+ return status;
+ }
+
+ if ((save_list == NULL) || (save_count == 0))
+ {
+ if (save_list != NULL) free(save_list);
+ asl_store_close(newstore);
+ return ASL_STATUS_OK;
+ }
+
+ /* save to the temp archive */
+ for (i = 0; i < save_count; i++)
+ {
+ status = write_to_archive(s, newstore, save_list[i]);
+ if (status != ASL_STATUS_OK)
+ {
+ if (save_list != NULL) free(save_list);
+ asl_store_close(newstore);
+ return status;
+ }
+ }
+
+ free(save_list);
+ save_list = NULL;
+
+ /* try rename since it's fast, but may fail (e.g. files are on different filesystems) */
+ fclose(s->db);
+ status = rename(newstore->db_path, s->db_path);
+ if (status == 0)
+ {
+ /* success */
+ s->db = fopen(s->db_path, "r+");
+ if (s->db == NULL)
+ {
+ /* Disaster! Can't open the database! */
+ asl_store_close(newstore);
+ return ASL_STATUS_FAILED;
+ }
+ }
+ else
+ {
+ /* rename failed, copy the data */
+ s->db = fopen(s->db_path, "r+");
+ if (s->db == NULL)
+ {
+ /* Disaster! Can't open the database! */
+ asl_store_close(newstore);
+ return ASL_STATUS_FAILED;
+ }
+
+ dbsize = newstore->record_count * DB_RECORD_LEN;
+ newmapped = mmap(0, dbsize, PROT_READ, MAP_PRIVATE, fileno(newstore->db), 0);
+ if (newmapped == (void *)-1)
+ {
+ asl_store_close(newstore);
+ return ASL_STATUS_FAILED;
+ }
+
+ fseek(s->db, 0, SEEK_SET);
+ status = ftruncate(fileno(s->db), 0);
+ if (status != ASL_STATUS_OK)
+ {
+ asl_store_close(newstore);
+ return status;
+ }
+
+ status = fwrite(newmapped, dbsize, 1, s->db);
+ munmap(newmapped, dbsize);
+ if (status == 0)
+ {
+ asl_store_close(newstore);
+ return ASL_STATUS_FAILED;
+ }
+ }
+
+ /* swap data in the store handles */
+ if (s->slotlist != NULL) free(s->slotlist);
+ s->slotlist = newstore->slotlist;
+ newstore->slotlist = NULL;
+
+ for (i = 0; i < RECORD_CACHE_SIZE; i++)
+ {
+ free(s->rcache[i]);
+ s->rcache[i] = newstore->rcache[i];
+ newstore->rcache[i] = NULL;
+ s->rcache_state[i] = newstore->rcache_state[i];
+ }
+
+ for (i = 0; i < STRING_CACHE_SIZE; i++)
+ {
+ s->string_cache[i].index = newstore->string_cache[i].index;
+ s->string_cache[i].refcount = newstore->string_cache[i].refcount;
+ if (s->string_cache[i].str != NULL) free(s->string_cache[i].str);
+ s->string_cache[i].str = newstore->string_cache[i].str;
+ newstore->string_cache[i].str = NULL;
+ }
+
+ s->flags = newstore->flags;
+ s->record_count = newstore->record_count;
+ s->message_count = newstore->message_count;
+ s->string_count = newstore->string_count;
+ s->empty_count = newstore->empty_count;
+ s->next_id = newstore->next_id;
+ s->max_time = newstore->max_time;
+ s->slotlist_count = newstore->slotlist_count;
+ s->slot_zero_count = newstore->slot_zero_count;
+
+ fclose(newstore->db);
+ unlink(newstore->db_path);
+ free(newstore->db_path);
+ free(newstore);
+
+ return ASL_STATUS_OK;
+ }
+
+ expire_ref = string_retain(s, ASL_KEY_EXPIRE_TIME, 0);
+
+ /*
+ * This flag turns off most of the code in slotlist_make_empty.
+ * We get much better performace while we delete records,
+ * but the slotlist has to be repaired and re-sorted afterwards.
+ */
+ s->flags |= ASL_STORE_FLAG_DEFER_SORT;
+
+ for (i = 0; i < archive_count; i++)
+ {
+ status = archive_release(s, archive_list[i], cut_time, expire_ref);
+ if (status != ASL_STATUS_OK) return status;
+ }
+
+ s->flags &= ~ASL_STORE_FLAG_DEFER_SORT;
+
+ free(archive_list);
+ archive_list = NULL;
+ archive_count = 0;
+
+ free(flags);
+ flags = NULL;
+
+ /* zero xids for slots that became empty during archive release */
+ for (i = 0; i < s->slotlist_count; i++)
+ {
+ if (s->slotlist[i].type == DB_TYPE_EMPTY) s->slotlist[i].xid = 0;
+ }
+
+ /* re-sort and determine the zero count */
+ qsort((void *)s->slotlist, s->slotlist_count, sizeof(slot_info_t), slot_comp);
+
+ /* new xid=0 count */
+ for (s->slot_zero_count = 0; (s->slot_zero_count < s->slotlist_count) && (s->slotlist[s->slot_zero_count].xid == 0); s->slot_zero_count++);
+
+ return ASL_STATUS_OK;
+}
+
+const char *
+asl_store_error(uint32_t code)
+{
+ switch (code)
+ {
+ case ASL_STATUS_OK: return "Operation Succeeded";
+ case ASL_STATUS_INVALID_ARG: return "Invalid Argument";
+ case ASL_STATUS_INVALID_STORE: return "Invalid Data Store";
+ case ASL_STATUS_INVALID_STRING: return "Invalid String";
+ case ASL_STATUS_INVALID_ID: return "Invalid ID Number";
+ case ASL_STATUS_INVALID_MESSAGE: return "Invalid Message";
+ case ASL_STATUS_NOT_FOUND: return "Not Found";
+ case ASL_STATUS_READ_FAILED: return "Read Operation Failed";
+ case ASL_STATUS_WRITE_FAILED: return "Write Operation Failed";
+ case ASL_STATUS_NO_MEMORY: return "System Memory Allocation Failed";
+ case ASL_STATUS_ACCESS_DENIED: return "Access Denied";
+ case ASL_STATUS_READ_ONLY: return "Read Only Access";
+ }
+
+ return "Operation Failed";
+}
projects / apple / syslog.git / commitdiff
