usually(1)                                                          usually(1)



NNAAMMEE
       usually - copy input to output, checking for anomalous lines

SSYYNNOOPPSSIISS
       uussuuaallllyy _p_a_t_t_e_r_n_f_i_l_e

DDEESSCCRRIIPPTTIIOONN
       uussuuaallllyy  copies  lines  from  stdin to stdout.  It expects each line to
       match at least one of the patterns listed in _p_a_t_t_e_r_n_f_i_l_e.   If  a  line
       does not match, uussuuaallllyy prints it to stderr.

       To  keep  its  memory  use bounded, uussuuaallllyy truncates long lines to 500
       characters before checking them against _p_a_t_t_e_r_n_f_i_l_e and  printing  them
       to stderr.  It does not truncate the copy printed to stdout.

       If uussuuaallllyy receives a HUP signal, it reads _p_a_t_t_e_r_n_f_i_l_e again.

PPAATTTTEERRNNSS
       _p_a_t_t_e_r_n_f_i_l_e  contains  a set of patterns, one pattern per line.  A pat-
       tern is a string of characters and wildcards.  A wildcard  matches  any
       string  of  characters  that does _n_o_t include the next character in the
       pattern.

       For example, the pattern

       * tcpcontrol: ok * *:*:25 *

       matches any line that consists of (1) non-space characters followed  by
       a  space;  (2)  tcpcontrol:_ok_; (3) non-space characters followed by a
       space; (4) non-colon characters followed  by  a  colon;  (5)  non-colon
       characters  followed  by  a colon; (6) 25_; and (7) any characters fol-
       lowed by a newline.

       uussuuaallllyy always matches blank lines and partial final lines.

SSEEEE AALLSSOO
       writeerr(1)



                                                                    usually(1)