SYNOPSIS

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

DESCRIPTION

       cyclog  copies its input to a log file in the dir directory.  When that
       file reaches 100000 bytes, cyclog makes sure it is  safely  written  to
       disk  and  starts writing to a new file.  cyclog also removes 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)



                                                                     cyclog(1)