如何将任意程序的log独立输出到某文件而不再出现在其他位置？

f5b

OpenBSD系统中，可以将任意程序的log输出独立保存在一个文件里面而不出现在任何其他地方，说明如下
http://www.openbsd.org/cgi-bin/m ... 386&format=html

EXAMPLES
     A configuration file might appear as follows:

     # Log info (and higher) messages from spamd only to
     # a dedicated file, discarding debug messages.
     # Matching messages abort evaluation of further rules.
     !!spamd
     daemon.info                                             /var/log/spamd
     daemon.debug                                            /dev/null
     !*



在FreeBSD中，好像无法做到，你们怎么做的？
http://www.freebsd.org/cgi/man.c ... ult&format=html

只有
     A program specification is a line beginning with `#!prog' or `!prog' (the
     former is for compatibility with the previous syslogd, if one is sharing
     syslog.conf files, for example) and the following blocks will be associ-
     ated with calls to syslog(3) from that specific program.  A program spec-
     ification for `foo' will also match any message logged by the kernel with
     the prefix `foo: '.  The `#!+prog' or `!+prog' specification works just
     like the previous one, and the `#!-prog' or `!-prog' specification will
     match any message but the ones from that program.        Multiple programs may
     be listed, separated by commas: `!prog1,prog2' matches messages from
     either program, while `!-prog1,prog2' matches all messages but those from
     `prog1' or `prog2'.