# readproctitle(8) - man - phpMan

[readproctitle(8)](https://www.chedong.com/phpMan.php/man/readproctitle/8/markdown)                       System Manager's Manual                      [readproctitle(8)](https://www.chedong.com/phpMan.php/man/readproctitle/8/markdown)



## NAME
       readproctitle - maintains an automatically rotated log in memory for inspection by [**ps**(1)](https://www.chedong.com/phpMan.php/man/ps/1/markdown).

       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)](https://www.chedong.com/phpMan.php/man/ps/1/markdown).   **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)](https://www.chedong.com/phpMan.php/man/ps/1/markdown) have small argument-length limits. These limits ap‐
       ply  to  the  total length of **readproctitle** _L_ _D_.  I have not seen a system with a limit below
       512 bytes.

## SEE ALSO
       [supervise(8)](https://www.chedong.com/phpMan.php/man/supervise/8/markdown), [svc(8)](https://www.chedong.com/phpMan.php/man/svc/8/markdown), [svok(8)](https://www.chedong.com/phpMan.php/man/svok/8/markdown), [svstat(8)](https://www.chedong.com/phpMan.php/man/svstat/8/markdown), [svscanboot(8)](https://www.chedong.com/phpMan.php/man/svscanboot/8/markdown), [svscan(8)](https://www.chedong.com/phpMan.php/man/svscan/8/markdown),  [fghack(8)](https://www.chedong.com/phpMan.php/man/fghack/8/markdown),  [pgrphack(8)](https://www.chedong.com/phpMan.php/man/pgrphack/8/markdown),
       [multilog(8)](https://www.chedong.com/phpMan.php/man/multilog/8/markdown),  [tai64n(8)](https://www.chedong.com/phpMan.php/man/tai64n/8/markdown), [tai64nlocal(8)](https://www.chedong.com/phpMan.php/man/tai64nlocal/8/markdown), [setuidgid(8)](https://www.chedong.com/phpMan.php/man/setuidgid/8/markdown), [envuidgid(8)](https://www.chedong.com/phpMan.php/man/envuidgid/8/markdown), [envdir(8)](https://www.chedong.com/phpMan.php/man/envdir/8/markdown), [softlimit(8)](https://www.chedong.com/phpMan.php/man/softlimit/8/markdown),
       [setlock(8)](https://www.chedong.com/phpMan.php/man/setlock/8/markdown), [ps(1)](https://www.chedong.com/phpMan.php/man/ps/1/markdown)

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



                                                                                    [readproctitle(8)](https://www.chedong.com/phpMan.php/man/readproctitle/8/markdown)