Shutting Down Your FTP Server

In order to support the proper shutting down of your server, you need to assure that the shutdown message file is in both the real user and anonymous user ftp areas. The location of the shutdown mesage file is specified in the ftpaccess file "shutdown" directive.

The problem is the supplied utility, 'ftpshut', only creates the message file in the actual location as indicated in the shutdown directive.

In the INSTALL file of wu-ftpd 2.4.* it is recommended to create a link in order for shutdown to work properly for real and anonymous user, e.g. If you use 'ftpshut', it will create a message file at the location specified in the ftpaccess shutdown directive.

When you are ready to remove the shutdown message file, you have to do so manually. (Ever had to go look in the ftpaccess file for its location because you forgot ...;-))

The following changes to 'ftpshut.c' and the new utility 'ftprestart' implement a means of shutting down the system that makes it convenient for the admin and does not require that you leave unresovled sybolic links scattered around your filesystems.

There are two files here, ftpshut and ftprestart. The copy of ftpshut.c included below was originally taken from BETA-13.

PLEASE NOTE: In order to get the virtual FTP server support described below you need to specify -DVIRTUAL in the appropriate makefile for your system.

The source is available here in a shar file.

ftpshut.c changes

The copy of ftpshut.c supports shutting down the server for both real users as well as guest accounts. It also supports virtual FTP servers.

Configurations:

FTPD server setup with no anonymous ftp support and NO virtual servers setup then the changes to ftpshut have no effect. The shutdown message file specified in the shutdown directive is created as before.
FTPD server setup WITH anonymous ftp support and NO virtual servers setup, ftpshut creates the shutdown message file at the location specified in the shutdown directive and also creates the message file in the anonymous FTP area. This allows automated support for both real users and guest accounts.
FTPD server setup WITH anonymous ftp support and WITH virtual servers setup, ftpshut acts as above and additionally creates the shutdown message file in the virtual FTP directories specified in the ftpaccess file. This allows shutdown support for virtual servers as well.

------------------ Example segment ------------------
shutdown /etc/shutmsg

# Virtual Server at 10.10.10.2 (ftp.some.domain)
virtual 10.10.10.2 root    /servers/some.domain/ftp
virtual 10.10.10.2 banner  /servers/some.domain/ftp/etc/msgs/banner.msg
virtual 10.10.10.2 logfile /var/log/servers/some.domain/xferlog


# Virtual Server at 10.10.10.10 (ftp.someother.domain)
virtual 10.10.10.10 root    /servers/someother.domain/ftp
virtual 10.10.10.10 banner  /servers/someother.domain/ftp/etc/msgs/banner.msg
virtual 10.10.10.10 logfile /var/log/servers/someother.domain/xferlog
------------------

Shutdown message files are created at

/etc/shutmsg
/servers/some.domain/ftp/etc/shutmsg
/servers/someother.domain/ftp/etc/shutmsg

Each file contains the same information.

ftprestart.c

ftprestart is used when you are ready to re-enable your FTP server. It does the opposite of ftpshut and removes shutdown message files that were created by ftpshut. It will remove the system-wide shutdown message file as well as the shutdown message files in the anonymous ftp areas and any virtual ftp server areas.

Sample output:

ftprestart: /servers/some.domain/ftp/etc/shutmsg removed.
ftprestart: /servers/someother.domain/ftp/etc/shutmsg removed.
ftprestart: /etc/shutmsg removed.

These modifications are being included in a future version of wu-ftpd.

---
Kent Landfield                        Phone: 1-817-545-2502             
The Landfield Group                   FAX:   1-817-545-7650             
Email: kent@landfield.com             http://www.landfield.com/
Please send comp.sources.misc related mail to kent@uunet.uu.net.
Search the Usenet Hypertext FAQ Archive at http://www.landfield.com/faqs/