NAME

       readproctitle - maintains an automatically rotated log in memory for inspection by ps(1).

       readproctitle is available in daemontools 0.75 and above.

SYNOPSIS

       readproctitle L D

DESCRIPTION

       L consists of any number of arguments.  D is one argument consisting of at least five dots.

       readproctitle reads data into the end of D, shifting D to the left to make room. This means that the most
       recent data is visible to process-listing tools such as ps(1).  readproctitle always leaves three dots at
       the left of D.

       For example, if

        readproctitle io errors: ....................

       reads the data

        fatal error xyz
        warning abc

       then its command-line arguments change to

        readproctitle io errors: ... xyz!warning abc!

       with  a  newline character in place of each !. Process-listing tools typically show the newline character
       as ? or \n.

       readproctitle exits when it reaches the end of input.

       Beware that most implementations of ps(1) have small argument-length limits. These limits  apply  to  the
       total length of readproctitle L D.  I have not seen a system with a limit below 512 bytes.

SEE ALSO

       supervise(8),  svc(8), svok(8), svstat(8), svscanboot(8), svscan(8), fghack(8), pgrphack(8), multilog(8),
       tai64n(8), tai64nlocal(8), setuidgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8), ps(1)

        http://cr.yp.to/daemontools.html
        http://cr.yp.to/slashcommand.html

                                                                                                readproctitle(8)