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journal: make sure sd_journal_seek_cursor() seeks to the specified entry if it exists, not one after it

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This commit is contained in:
Lennart Poettering 2012-10-10 01:34:27 +02:00
parent 96ede2601f
commit a87247dd5d
2 changed files with 13 additions and 10 deletions
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3
src/journal/journal-internal.h
View file

@ -59,7 +59,8 @@ struct Match {
typedef enum LocationType {
LOCATION_HEAD,
LOCATION_TAIL,
LOCATION_DISCRETE
LOCATION_DISCRETE,
LOCATION_SEEK
} LocationType;
struct Location {

20
src/journal/sd-journal.c
View file

@ -58,12 +58,13 @@ static void reset_location(sd_journal *j) {
zero(j->current_location);
}
static void init_location(Location *l, JournalFile *f, Object *o) {
static void init_location(Location *l, LocationType type, JournalFile *f, Object *o) {
assert(l);
assert(type == LOCATION_DISCRETE || type == LOCATION_SEEK);
assert(f);
assert(o->object.type == OBJECT_ENTRY);
l->type = LOCATION_DISCRETE;
l->type = type;
l->seqnum = le64toh(o->entry.seqnum);
l->seqnum_id = f->header->seqnum_id;
l->realtime = le64toh(o->entry.realtime);
@ -74,12 +75,13 @@ static void init_location(Location *l, JournalFile *f, Object *o) {
l->seqnum_set = l->realtime_set = l->monotonic_set = l->xor_hash_set = true;
}
static void set_location(sd_journal *j, JournalFile *f, Object *o, uint64_t offset) {
static void set_location(sd_journal *j, LocationType type, JournalFile *f, Object *o, uint64_t offset) {
assert(j);
assert(type == LOCATION_DISCRETE || type == LOCATION_SEEK);
assert(f);
assert(o);
init_location(&j->current_location, f, o);
init_location(&j->current_location, type, f, o);
j->current_file = f;
j->current_field = 0;
@ -447,7 +449,7 @@ static int compare_with_location(JournalFile *af, Object *ao, Location *l) {
assert(af);
assert(ao);
assert(l);
assert(l->type == LOCATION_DISCRETE);
assert(l->type == LOCATION_DISCRETE || l->type == LOCATION_SEEK);
if (l->monotonic_set &&
sd_id128_equal(ao->entry.boot_id, l->boot_id) &&
@ -866,7 +868,7 @@ static int real_journal_next(sd_journal *j, direction_t direction) {
if (r < 0)
return r;
set_location(j, new_file, o, new_offset);
set_location(j, LOCATION_DISCRETE, new_file, o, new_offset);
return 1;
}
@ -1029,7 +1031,7 @@ _public_ int sd_journal_seek_cursor(sd_journal *j, const char *cursor) {
reset_location(j);
j->current_location.type = LOCATION_DISCRETE;
j->current_location.type = LOCATION_SEEK;
if (realtime_set) {
j->current_location.realtime = (uint64_t) realtime;
@ -1061,7 +1063,7 @@ _public_ int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, u
return -EINVAL;
reset_location(j);
j->current_location.type = LOCATION_DISCRETE;
j->current_location.type = LOCATION_SEEK;
j->current_location.boot_id = boot_id;
j->current_location.monotonic = usec;
j->current_location.monotonic_set = true;
@ -1074,7 +1076,7 @@ _public_ int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) {
return -EINVAL;
reset_location(j);
j->current_location.type = LOCATION_DISCRETE;
j->current_location.type = LOCATION_SEEK;
j->current_location.realtime = usec;
j->current_location.realtime_set = true;