Implementation Differences

The implementation of tftpd on the HP 3000 differs from tftpd on the HP 9000 in three ways:

On HP-UX, tftpd is usually run as root. On MPE/iX, it is usually run as USER.TFTP.
On HP-UX, tftpd checks if the user tftp can write to or read the file. On MPE, tftpd checks if the user specified in its configuration file can write to or read the file. If you configure tftpd as recommended in this chapter, USER.TFTP will be specified in the configuration file and tftpd will check the same user.
On MPE/iX, the tftp user is configurable and it is not on HP-UX. As a result, on MPE/iX tftpd looks at the file relative to the home directory of whichever user is specified in the inetd configuration file. On HP-UX, inetd always looks at the file relative to the home directory of the tftp user.

Technical documentation