home *** CD-ROM | disk | FTP | other *** search
- Installation Instructions for POP3 server (08-19-91)
- =========================================
-
- General:
- The POP3 server is a TCP/IP server. It accepts one line commands,
- and responds with one or more ASCII text lines. For a complete
- description of the POP3 syntax, please refer to RFC 1225.
- The POP3 server is similar to the FTP and SMTP servers; it should
- be installed like ftpd and smtpd.
-
- UNIX installation:
- -----------------
-
- - copy and compile the pop3d program
- - copy the pop3d program to the /etc directory; it should
- be owned by root and should have permissions 700
- once installed, its directory listing should look something like this:
-
- -rwx------ 1 root 30720 Aug 10 1990 /etc/pop3d
-
-
- - add an entry for pop3d in the file /etc/services
- it should look like this:
-
- pop3 110/tcp postoffice
-
-
- - add an entry for pop3d in the file /etc/inetd.conf
- it should look like this:
-
- pop3 stream tcp nowait root /etc/pop3d pop3d
-
-
- - restart the inetd program; inetd will connect incoming TCP/IP
- traffic for the POP3 server to the pop3d program. Get the PID
- number for inetd with the ps command; then restart inetd:
-
- aggie: 9> ps -fax | grep inetd
- 92 ? I 3:19 /etc/inetd
- 14470 p0 S 0:00 grep inetd
- aggie: 10> kill -HUP 92
- aggie: 11>
-
-
- - pop3d is now installed
-
-
-
- Sun OS installation:
- -------------------
-
- - copy and compile the pop3d program
-
- - copy the pop3d program to the /etc directory (NOTE: network
- files may be stored in a different directory on your system); it should
- be owned by root and should have permissions 700
- once installed, its directory listing should look something like this:
-
- -rwx------ 1 root 49152 Feb 8 1990 /etc/in.pop3d
-
- - if you use an /etc/services file, add an entry for pop3d in the
- file /etc/services it should look like this:
-
- pop3 110/tcp postoffice
-
- - add an entry for pop3d in the file /usr/etc/inetd.conf
- it should look like this:
-
- pop3 stream tcp nowait root /etc/in.pop3d in.pop3d
-
-
- - if you are running Yellow Pages, remake yp
-
- - restart the inetd program; inetd will connect incoming TCP/IP
- traffic for the POP3 server to the pop3d program. Get the PID
- number for inetd with the ps command; then restart inetd:
-
- wilma% ps -ax | grep inetd
- 114 ? IW 0:15 inetd
- 2082 p1 S 0:00 grep inetd
- wilma% kill -HUP 114
- wilma%
-
-
- - pop3d is now installed
-
-
- Special note for various UNIX-like operating systems
- ====================================================
-
- When you compile the server, you may get an error involving
- the flock() function or the LOCK_EX and LOCK_UN
- constants. The purpose of these calls is to create an exclusive
- lock on the mailbox file. This prevents other processes from
- re-writing the mailbox while the POP server is also writing or
- reading from the mailbox.
-
- In general, the flock() function may not be avialable on your system.
-
- The 'brute force' way to get around this problem is to simply
- comment out the flock() calls. However, this will leave the mailbox
- file unprotected from other processes; if two processes write to the
- file at the same time, the results are undefined.
-
- As an alternative, you should check the source code for other
- e-mail prcoesses on your system. Presumably, they will have some
- kind of file locking mechanism. Modify the POP3 server source
- code to use the same file locking mechanism.
-
- -----------------------------------------------------------------------------
-
- -- Katie Stevens
- dkstevens@ucdavis.edu
- Information Technology -- Campus Access Point
- University of California, Davis
-