SYNOPSIS

       cyclog [ -ssize ] [ -nnum ] [ -mmargin ] dir

DESCRIPTION

       cyclog  copies its input to a log file in the dir directo-
ry.  When that
       file reaches 100000 bytes, cyclog makes sure it is  safely
written  to
       disk  and  starts writing to a new file.  cyclog also  re-
moves old files
       to guarantee that there are at most 10 log files in dir.

       The  name of a log file is the TAI timestamp when the file
was  started.
       The  mode of the file is 444 if it has been safely written
to disk, 644
       otherwise.   A  log file that has not been written to disk
is not guaran-
       teed to survive a system crash.

       The dir directory must exist and be writable to cyclog.

OPTIONS

       -ssize
            (Default:  104000. Minimum: 512.)  Maximum file size.
After writ-
            ing  this many bytes to one file, cyclog will start a
new file.

       -nnum
            (Default: 10. Minimum: 1.)   Maximum  number  of  log
files.   If
            cyclog  sees  this  many  files before it opens a new
file, it removes
            the oldest, as determined by the starting timestamps.

       -mmargin
            (Default:  4000.)  cyclog tries to chop log files  at
line  bound-
            aries.   If  it  sees a newline within  margin  bytes
of the maximum
            file size, it starts a new file.

SEE ALSO

       fsync(2)



                                                                     cy-
clog(1)