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Commit Graph

4 Commits

Author SHA1 Message Date
Lennart Poettering
3c1668da62 journal: add ability to list values a specified field can take in all entries of the journal
The new 'unique' API allows listing all unique field values that a field
specified by a field name can take in all entries of the journal. This
allows answering queries such as "What units logged to the journal?",
"What hosts have logged into the journal?", "Which boot IDs have logged
into the journal?".

Ultimately this allows implementation of tools similar to lastlog based
on journal data.

Note that listing these field values will not work for journal files
created with older journald, as the field values are not indexed in
older files.
2012-10-18 03:35:18 +02:00
Lennart Poettering
4a010f4e6e man: document sd_journal_get_cursor() 2012-07-13 20:39:05 +02:00
Lennart Poettering
7a8a6e8854 man: document sd_journal_get_realtime_usec() 2012-07-13 19:32:11 +02:00
Lennart Poettering
4171a6676c man: document sd_journal_get_data() and friends 2012-07-13 19:00:48 +02:00