Lastlog

Do you mean:

• The lastlog command, /lastlog [options] [pattern] [number [skip]], which searches retained output and redisplays matching lines or appends them to a file?
• The lastlog function, $lastlog(window pattern levels...), which returns matching line positions rather than displaying the text?

Related settings are set lastlog and window lastlog, which control retention limits, and lastlog_level, which controls which output levels are retained. Display scrollback and searchable lastlog records are related but are not identical; see memory usage.

These interfaces use locally retained output. They do not query the server for older messages or recover records already discarded. Their pattern syntax, results, and options differ; consult the selected interface before reusing arguments from the other.

Source references

• source/lastlog.c: retention, command search/display, and function results.
• source/vars.c and source/window.c: global and per-window retention settings.