+ <b>--output=(messages|threads|files)</b>
+
+ <b>messages</b>
+ Output the number of matching messages. This is the
+ default.
+
+ <b>threads</b>
+ Output the number of matching threads.
+
+ <b>files</b> Output the number of files associated with matching mes‐
+ sages. This may be bigger than the number of matching
+ messages due to duplicates (i.e. multiple files having
+ the same message-id).
+
+ <b>--exclude=(true|false)</b>
+ Specify whether to omit messages matching search.tag_exclude
+ from the count (the default) or not.
+
+ <b>--batch</b>
+ Read queries from a file (stdin by default), one per line,
+ and output the number of matching messages (or threads) to
+ stdout, one per line. On an empty input line the count of all
+ messages (or threads) in the database will be output. This
+ option is not compatible with specifying search terms on the
+ command line.
+
+ <b>--lastmod</b>
+ Append lastmod (counter for number of database updates) and
+ UUID to the output. lastmod values are only comparable
+ between databases with the same UUID.
+
+ <b>--input=<filename></b>
+ Read input from given file, instead of from stdin. Implies
+ <b>--batch</b>.
+</pre>