Send log messages via the Unix Syslog interface.
Syslog is great for system daemons that log free-form human readable status messages
or other debugging output, but not so great for archiving structured data. Access to
read Syslog's messages may also be restricted. syslogd's logs are also not
necessarily kept forever. For application level logging consider
Core_extended.Std.Logger instead.
module Open_option = Core__.Syslog.Open_optionmodule Level = Core__.Syslog.Levelval setlogmask : ?allowed_levels:Level.t list ‑> ?from_level:Level.t ‑> ?to_level:Level.t ‑> unit ‑> unitAll levels in allowed_levels will be allowed, and additionally all ranging from
from_level to to_level (inclusive).
val openlog : ?id:string ‑> ?options:Open_option.t list ‑> ?facility:Facility.t ‑> unit ‑> unitopenlog ~id ~options ~facility () opens a connection to the system logger (possibly
delayed) using prefixed identifier id, options, and facility.
WARNING: this function leaks the id argument, if provided. There is no way around
that if syslog is called in a multi-threaded environment! Therefore it shouldn't be
called too often. What for, anyway?
Calling openlog before syslog is optional. If you forget, syslog will do it for
you with the defaults.
val syslog : ?facility:Facility.t ‑> ?level:Level.t ‑> string ‑> unitsyslog ~facility ~level message logs message using syslog with facility at
level.
val syslogf : ?facility:Facility.t ‑> ?level:Level.t ‑> ('a, unit, string, unit) Core__.Import.format4 ‑> 'asyslog_printf acts like syslog, but allows printf-style specification of the
message.