Mac OS X Panther for Unix Geeks, Second Edition

Name

kdumpd

Synopsis

kdumpd [-l] [-s directory [-u username] [-c | -C]] [-n] [directory]

Description

Provides a service meant to accept transfers of kernel core dumps from remote Mac OS X clients. Based on tftpd, kdumpd offers a simplistic file drop service. Setting it up involves:

• Adding a kdump entry to /etc/services, recommended on UDP port 1069.

• Creating a kdump service file in /etc/xinetd.d/, modeled after that for tftp.

• Executing sudo service kdump start.

Once that’s done, you can invoke tftp on a client system, enter connect server_name 1069, and use put filename to transfer a file. The file will be saved on the server in the directory specified in the arguments to kdumpd. There are restrictions: the filename cannot include / or .., so the target file will be deposited into the target directory only and must not already exist.

This service is apparently not used by any current facility, but may exist for future use by Apple.

Options/Usage

-c

Same as -C. Using this option should reject the connection if the path including the client IP address doesn’t exist, but a bug prevents it from doing this.

-C

Adds the client’s IP address to the end of the chroot directory path. If this path doesn’t already exist, it falls back to the one specified for -s.

-l

Enables logging via syslog using the ftp facility. However, logging is enabled by default, so this option doesn’t actually do anything.

-n

Suppresses a negative acknowledgment if the client requests a relative pathname that doesn’t exist.

-s

Performs ...