diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/journal/journalctl.c | 134 |
1 files changed, 59 insertions, 75 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c index dfde0a9355..7ce5ff6a66 100644 --- a/src/journal/journalctl.c +++ b/src/journal/journalctl.c @@ -844,28 +844,32 @@ static int boot_id_cmp(const void *a, const void *b) { return _a < _b ? -1 : (_a > _b ? 1 : 0); } -static int list_boots(sd_journal *j) { +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; - unsigned int count = 0; - int w, i; size_t length, allocated = 0; - boot_id_t *id; - _cleanup_free_ boot_id_t *all_ids = NULL; + + assert(j); + assert(boots); + assert(count); r = sd_journal_query_unique(j, "_BOOT_ID"); if (r < 0) return r; - pager_open_if_enabled(); - + *count = 0; SD_JOURNAL_FOREACH_UNIQUE(j, data, length) { + boot_id_t *id; + assert(startswith(data, "_BOOT_ID=")); - if (!GREEDY_REALLOC(all_ids, allocated, count + 1)) + if (!GREEDY_REALLOC(*boots, allocated, *count + 1)) return log_oom(); - id = &all_ids[count]; + id = *boots + *count; r = sd_id128_from_string(((const char *)data) + strlen("_BOOT_ID="), &id->id); if (r < 0) @@ -889,26 +893,48 @@ static int list_boots(sd_journal *j) { if (r < 0) return r; - r = sd_journal_seek_tail(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; - r = sd_journal_previous(j); - if (r < 0) - return r; - else if (r == 0) - goto flush; + r = sd_journal_previous(j); + if (r < 0) + return r; + else if (r == 0) + goto flush; - r = sd_journal_get_realtime_usec(j, &id->last); - if (r < 0) - return r; + r = sd_journal_get_realtime_usec(j, &id->last); + if (r < 0) + return r; + } - count++; + (*count)++; flush: sd_journal_flush_matches(j); } - qsort_safe(all_ids, count, sizeof(boot_id_t), boot_id_cmp); + qsort_safe(*boots, *count, sizeof(boot_id_t), boot_id_cmp); + return 0; +} + +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; + + assert(j); + + r = get_boots(j, &all_ids, &count, NULL); + if (r < 0) + return r; + + pager_open_if_enabled(); /* numbers are one less, but we need an extra char for the sign */ w = DECIMAL_STR_WIDTH(count - 1) + 1; @@ -926,76 +952,34 @@ static int list_boots(sd_journal *j) { return 0; } -static int get_relative_boot_id(sd_journal *j, sd_id128_t *boot_id, int relative) { +static int get_boot_id_by_offset(sd_journal *j, sd_id128_t *boot_id, int offset) { int r; - const void *data; - unsigned int count = 0; - size_t length, allocated = 0; - boot_id_t ref_boot_id = {SD_ID128_NULL}, *id; + unsigned int count; + boot_id_t ref_boot_id = {}, *id; _cleanup_free_ boot_id_t *all_ids = NULL; assert(j); assert(boot_id); - r = sd_journal_query_unique(j, "_BOOT_ID"); + ref_boot_id.id = *boot_id; + r = get_boots(j, &all_ids, &count, &ref_boot_id); if (r < 0) return r; - SD_JOURNAL_FOREACH_UNIQUE(j, data, length) { - if (length < strlen("_BOOT_ID=")) - continue; - - if (!GREEDY_REALLOC(all_ids, allocated, count + 1)) - return log_oom(); - - id = &all_ids[count]; - - r = sd_id128_from_string(((const char *)data) + strlen("_BOOT_ID="), &id->id); - if (r < 0) - continue; - - r = sd_journal_add_match(j, data, length); - if (r < 0) - return r; - - r = sd_journal_seek_head(j); - if (r < 0) - return r; - - r = sd_journal_next(j); - if (r < 0) - return r; - else if (r == 0) - goto flush; - - r = sd_journal_get_realtime_usec(j, &id->first); - if (r < 0) - return r; - - if (sd_id128_equal(id->id, *boot_id)) - ref_boot_id = *id; - - count++; - flush: - sd_journal_flush_matches(j); - } - - qsort_safe(all_ids, count, sizeof(boot_id_t), boot_id_cmp); - if (sd_id128_equal(*boot_id, SD_ID128_NULL)) { - if (relative > (int) count || relative <= -(int)count) + if (offset > (int) count || offset <= -(int)count) return -EADDRNOTAVAIL; - *boot_id = all_ids[(relative <= 0)*count + relative - 1].id; + *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 || - relative <= 0 ? (id - all_ids) + relative < 0 : - (id - all_ids) + relative >= (int) count) + offset <= 0 ? (id - all_ids) + offset < 0 : + (id - all_ids) + offset >= (int) count) return -EADDRNOTAVAIL; - *boot_id = (id + relative)->id; + *boot_id = (id + offset)->id; } return 0; @@ -1013,7 +997,7 @@ 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_relative_boot_id(j, &arg_boot_id, arg_boot_offset); + 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("Failed to look up boot %+i: %s", arg_boot_offset, strerror(-r)); |