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-rw-r--r--src/journal/journalctl.c275
1 files changed, 174 insertions, 101 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 09f4e0fe38..b51df7d54e 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -130,6 +130,7 @@ typedef struct boot_id_t {
sd_id128_t id;
uint64_t first;
uint64_t last;
+ LIST_FIELDS(struct boot_id_t, boot_list);
} boot_id_t;
static void pager_open_if_enabled(void) {
@@ -734,6 +735,11 @@ static int parse_argv(int argc, char *argv[]) {
return -EINVAL;
}
+ if ((arg_boot || arg_action == ACTION_LIST_BOOTS) && (arg_file || arg_directory || arg_merge)) {
+ log_error("Using --boot or --list-boots with --file, --directory or --merge is not supported.");
+ return -EINVAL;
+ }
+
return 1;
}
@@ -853,111 +859,203 @@ static int add_matches(sd_journal *j, char **args) {
return 0;
}
-static int boot_id_cmp(const void *a, const void *b) {
- uint64_t _a, _b;
+static int discover_next_boot(sd_journal *j,
+ boot_id_t **boot,
+ bool advance_older,
+ bool read_realtime) {
+ int r;
+ char match[9+32+1] = "_BOOT_ID=";
+ _cleanup_free_ boot_id_t *next_boot = NULL;
- _a = ((const boot_id_t *)a)->first;
- _b = ((const boot_id_t *)b)->first;
+ assert(j);
+ assert(boot);
- return _a < _b ? -1 : (_a > _b ? 1 : 0);
-}
+ /* We expect the journal to be on the last position of a boot
+ * (in relation to the direction we are going), so that the next
+ * invocation of sd_journal_next/previous will be from a different
+ * boot. We then collect any information we desire and then jump
+ * to the last location of the new boot by using a _BOOT_ID match
+ * coming from the other journal direction. */
-static int get_boots(sd_journal *j,
- boot_id_t **boots,
- unsigned int *count,
- boot_id_t *query_ref_boot) {
- int r;
- const void *data;
- size_t length, allocated = 0;
+ /* Make sure we aren't restricted by any _BOOT_ID matches, so that
+ * we can actually advance to a *different* boot. */
+ sd_journal_flush_matches(j);
- assert(j);
- assert(boots);
- assert(count);
+ if (advance_older)
+ r = sd_journal_previous(j);
+ else
+ r = sd_journal_next(j);
+ if (r < 0)
+ return r;
+ else if (r == 0)
+ return 0; /* End of journal, yay. */
+
+ next_boot = new0(boot_id_t, 1);
+ if (!next_boot)
+ return log_oom();
- r = sd_journal_query_unique(j, "_BOOT_ID");
+ r = sd_journal_get_monotonic_usec(j, NULL, &next_boot->id);
if (r < 0)
return r;
- *count = 0;
- SD_JOURNAL_FOREACH_UNIQUE(j, data, length) {
- boot_id_t *id;
+ if (read_realtime) {
+ r = sd_journal_get_realtime_usec(j, &next_boot->first);
+ if (r < 0)
+ return r;
+ }
- assert(startswith(data, "_BOOT_ID="));
+ /* Now seek to the last occurrence of this boot ID. */
+ sd_id128_to_string(next_boot->id, match + 9);
+ r = sd_journal_add_match(j, match, sizeof(match) - 1);
+ if (r < 0)
+ return r;
- if (!GREEDY_REALLOC(*boots, allocated, *count + 1))
- return log_oom();
+ if (advance_older)
+ r = sd_journal_seek_head(j);
+ else
+ r = sd_journal_seek_tail(j);
+ if (r < 0)
+ return r;
- id = *boots + *count;
+ if (advance_older)
+ r = sd_journal_next(j);
+ else
+ r = sd_journal_previous(j);
+ if (r < 0)
+ return r;
+ else if (r == 0)
+ return -ENODATA; /* This shouldn't happen. We just came from this very boot ID. */
- r = sd_id128_from_string(((const char *)data) + strlen("_BOOT_ID="), &id->id);
+ if (read_realtime) {
+ r = sd_journal_get_realtime_usec(j, &next_boot->last);
if (r < 0)
- continue;
+ return r;
+ }
+
+ *boot = next_boot;
+ next_boot = NULL;
+ return 0;
+}
+
+static int get_boots(sd_journal *j,
+ boot_id_t **boots,
+ boot_id_t *query_ref_boot,
+ int ref_boot_offset) {
+ bool skip_once;
+ int r, count = 0;
+ boot_id_t *head = NULL, *tail = NULL;
+ const bool advance_older = query_ref_boot && ref_boot_offset <= 0;
+
+ assert(j);
+
+ /* Adjust for the asymmetry that offset 0 is
+ * the last (and current) boot, while 1 is considered the
+ * (chronological) first boot in the journal. */
+ skip_once = query_ref_boot && sd_id128_is_null(query_ref_boot->id) && ref_boot_offset < 0;
+
+ /* Advance to the earliest/latest occurrence of our reference
+ * boot ID (taking our lookup direction into account), so that
+ * discover_next_boot() can do its job.
+ * If no reference is given, the journal head/tail will do,
+ * they're "virtual" boots after all. */
+ if (query_ref_boot && !sd_id128_is_null(query_ref_boot->id)) {
+ char match[9+32+1] = "_BOOT_ID=";
- r = sd_journal_add_match(j, data, length);
+ sd_journal_flush_matches(j);
+
+ sd_id128_to_string(query_ref_boot->id, match + 9);
+ r = sd_journal_add_match(j, match, sizeof(match) - 1);
if (r < 0)
return r;
- r = sd_journal_seek_head(j);
+ if (advance_older)
+ r = sd_journal_seek_head(j);
+ else
+ r = sd_journal_seek_tail(j);
if (r < 0)
return r;
- r = sd_journal_next(j);
+ if (advance_older)
+ r = sd_journal_next(j);
+ else
+ r = sd_journal_previous(j);
if (r < 0)
return r;
else if (r == 0)
- goto flush;
-
- r = sd_journal_get_realtime_usec(j, &id->first);
+ goto finish;
+ else if (ref_boot_offset == 0) {
+ count = 1;
+ goto finish;
+ }
+ } else {
+ if (advance_older)
+ r = sd_journal_seek_tail(j);
+ else
+ r = sd_journal_seek_head(j);
if (r < 0)
return r;
- if (query_ref_boot) {
- id->last = 0;
- if (sd_id128_equal(id->id, query_ref_boot->id))
- *query_ref_boot = *id;
- } else {
- r = sd_journal_seek_tail(j);
- if (r < 0)
- return r;
+ /* No sd_journal_next/previous here. */
+ }
- r = sd_journal_previous(j);
- if (r < 0)
- return r;
- else if (r == 0)
- goto flush;
+ while (true) {
+ _cleanup_free_ boot_id_t *current = NULL;
- r = sd_journal_get_realtime_usec(j, &id->last);
- if (r < 0)
- return r;
+ r = discover_next_boot(j, &current, advance_older, !query_ref_boot);
+ if (r < 0) {
+ boot_id_t *id, *id_next;
+ LIST_FOREACH_SAFE(boot_list, id, id_next, head)
+ free(id);
+ return r;
}
- (*count)++;
- flush:
- sd_journal_flush_matches(j);
+ if (!current)
+ break;
+
+ if (query_ref_boot) {
+ if (!skip_once)
+ ref_boot_offset += advance_older ? 1 : -1;
+ skip_once = false;
+
+ if (ref_boot_offset == 0) {
+ count = 1;
+ query_ref_boot->id = current->id;
+ break;
+ }
+ } else {
+ LIST_INSERT_AFTER(boot_list, head, tail, current);
+ tail = current;
+ current = NULL;
+ count++;
+ }
}
- qsort_safe(*boots, *count, sizeof(boot_id_t), boot_id_cmp);
- return 0;
+finish:
+ if (boots)
+ *boots = head;
+
+ sd_journal_flush_matches(j);
+
+ return count;
}
static int list_boots(sd_journal *j) {
- int r, w, i;
- unsigned int count;
- boot_id_t *id;
- _cleanup_free_ boot_id_t *all_ids = NULL;
+ int w, i, count;
+ boot_id_t *id, *id_next, *all_ids;
assert(j);
- r = get_boots(j, &all_ids, &count, NULL);
- if (r < 0)
- return r;
+ count = get_boots(j, &all_ids, NULL, 0);
+ if (count <= 0)
+ return count;
pager_open_if_enabled();
/* numbers are one less, but we need an extra char for the sign */
w = DECIMAL_STR_WIDTH(count - 1) + 1;
- for (id = all_ids, i = 0; id < all_ids + count; id++, i++) {
+ i = 0;
+ LIST_FOREACH_SAFE(boot_list, id, id_next, all_ids) {
char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];
printf("% *i " SD_ID128_FORMAT_STR " %s—%s\n",
@@ -965,39 +1063,8 @@ static int list_boots(sd_journal *j) {
SD_ID128_FORMAT_VAL(id->id),
format_timestamp_maybe_utc(a, sizeof(a), id->first),
format_timestamp_maybe_utc(b, sizeof(b), id->last));
- }
-
- return 0;
-}
-
-static int get_boot_id_by_offset(sd_journal *j, sd_id128_t *boot_id, int offset) {
- int r;
- unsigned int count;
- boot_id_t ref_boot_id = {}, *id;
- _cleanup_free_ boot_id_t *all_ids = NULL;
-
- assert(j);
- assert(boot_id);
-
- ref_boot_id.id = *boot_id;
- r = get_boots(j, &all_ids, &count, &ref_boot_id);
- if (r < 0)
- return r;
-
- if (sd_id128_equal(*boot_id, SD_ID128_NULL)) {
- if (offset > (int) count || offset <= -(int)count)
- return -EADDRNOTAVAIL;
-
- *boot_id = all_ids[(offset <= 0)*count + offset - 1].id;
- } else {
- id = bsearch(&ref_boot_id, all_ids, count, sizeof(boot_id_t), boot_id_cmp);
-
- if (!id ||
- offset <= 0 ? (id - all_ids) + offset < 0 :
- (id - all_ids) + offset >= (int) count)
- return -EADDRNOTAVAIL;
-
- *boot_id = (id + offset)->id;
+ i++;
+ free(id);
}
return 0;
@@ -1006,6 +1073,7 @@ static int get_boot_id_by_offset(sd_journal *j, sd_id128_t *boot_id, int offset)
static int add_boot(sd_journal *j) {
char match[9+32+1] = "_BOOT_ID=";
int r;
+ boot_id_t ref_boot_id = {};
assert(j);
@@ -1015,17 +1083,22 @@ static int add_boot(sd_journal *j) {
if (arg_boot_offset == 0 && sd_id128_equal(arg_boot_id, SD_ID128_NULL))
return add_match_this_boot(j, arg_machine);
- r = get_boot_id_by_offset(j, &arg_boot_id, arg_boot_offset);
- if (r < 0) {
- if (sd_id128_equal(arg_boot_id, SD_ID128_NULL))
- log_error_errno(r, "Failed to look up boot %+i: %m", arg_boot_offset);
+ ref_boot_id.id = arg_boot_id;
+ r = get_boots(j, NULL, &ref_boot_id, arg_boot_offset);
+ assert(r <= 1);
+ if (r <= 0) {
+ const char *reason = (r == 0) ? "No such boot ID in journal" : strerror(-r);
+
+ if (sd_id128_is_null(arg_boot_id))
+ log_error("Failed to look up boot %+i: %s", arg_boot_offset, reason);
else
log_error("Failed to look up boot ID "SD_ID128_FORMAT_STR"%+i: %s",
- SD_ID128_FORMAT_VAL(arg_boot_id), arg_boot_offset, strerror(-r));
- return r;
+ SD_ID128_FORMAT_VAL(arg_boot_id), arg_boot_offset, reason);
+
+ return r == 0 ? -ENODATA : r;
}
- sd_id128_to_string(arg_boot_id, match + 9);
+ sd_id128_to_string(ref_boot_id.id, match + 9);
r = sd_journal_add_match(j, match, sizeof(match) - 1);
if (r < 0)
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-13 21:35:56 +0000