February 2004
Intermediate to advanced
383 pages
11h 49m
English
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Name
kdumpd
Synopsis
kdumpd [-l] [-sdirectory[-uusername] [-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
kdumpentry to/etc/services, recommended on UDP port 1069.Creating a
kdumpservice file in/etc/xinetd.d/, modeled after that fortftp.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
chrootdirectory path. If this path doesn’t already exist, it falls back to the one specified for -s.- -l
Enables logging via
syslogusing theftpfacility. 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 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.