On Thu, Jun 3, 2010 at 14:58, Wietse Venema <wie...@porcupine.org> wrote: > Phil Howard: >> It looks like postmap can read stdin when getting a list of keys for >> delete or query. > > As documented in the postmap manpage: > > -d key > ... > If a key value of - is specified, the program reads key values > from the standard input stream. > > -i Incremental mode. Read entries from standard input and do not > truncate an existing database. > > -q key > ... > If a key value of - is specified, the program reads key values > from the standard input stream and writes one line of key value > output for each key that was found. > >> There appeared to be no documented way to read from >> stdin to create a new map.
So that limits using stdin to incrementing an existing map (such as creating an empty one), or using the /dev/stdin trick. I'm just wondering if there any pitfalls to the /dev/stdin method.
