SYNOPSIS
xtrace [ options ] [ -s | -k ] [ [ -W ] [ -- ] command args ... ]DESCRIPTION
Xtrace fakes an X server and forwards all connections to a real X server, displaying the communication between clients in (well, theoretically) human readable form. If a command is given, xtrace executes the named command with $DISPLAY set to the faked X server. If that command exits before any connections are made, xtrace exits immediately unless -W is specified.OPTIONS
- -I directory
- Look into directory for protocol description files. (i.e. the directory where the .proto files can be found).
- -s | --stopwhendone (default)
- Terminate when all forwarded clients have disconnected. (Or when a program was run once the program has finished and all connections are closed).
- -k | --keeprunning
- If all clients disconnected, wait for new ones to connect.
- -W | --waitforclient
- Do not stop when the started program terminates before any connection was made. (Might be necessary if the program forks to background).
- -d name | --display name
- Forward connections to the X server specified by name instead of the one specified by the environment variable DISPLAY.
- -D name | --fakedisplay name
- Fake display name instead of $FAKEDISPLAY or :9 respectively.
- -f filename | --authfile filename
- Add an -f filename to the arguments for all calls to xauth to get the authentication tokens of the X server to connect to.
- -F filename | --newauthfile filename
- Add an -f filename to the arguments for all calls to xauth to save the authentication tokens to connect to the faked X server.
- -c | --copyauthentication (default)
-
Copy the authentication tokens for the X server to connect
to so that clients connecting to our fake server will use
them.
The commands run are roughly equivalent to: xauth add $FAKEDISPLAY . `xauth list $DISPLAY | awk '$2=="MIT-MAGIC-COOKIE-1" {print $3}'`
Not that only MIT-MAGIC-COOKIE-1 tokens are copied as xtrace does not yet support to change the authentication tokens so that XDM-AUTHORIZATION-1 would be possible.
- -n | --nocopyauthentication
- Do not call xauth and do fiddle with authentication tokens but leave that to the user to handle.
- -e | --denyextensions
- Modify all server replies to say there are no extensions available. (As xtrace does supports only a small number of extensions anyway and calls all extended requests "unknown" and all replies to such requests "unexpected").
- -w | --readwritedebug
- Print how many bytes are read and/or written when.
- -m count | --maxklistlength count
- Print only the first count many elements of all lists.
- -i | --interactive
- Only sent requests from the client to the server after interactive confirmation. Confirmation is given by pressing enter or a number followed by enter via stdin. This can give funny results when multiple clients are tunneled.
- -o | --outfile filename
- Dump output into filename instead of stdout.
- -b | --buffered
- Do not write every line on its own but wait until buffers are full. Speeds up things a little bit when outputting to a file. Not very useful at all together with -i.
- --timestamps
-
Print a timestamp before each line.
Note that the time a packet is printed is between the time a packet is received and the time a packet is sent, but it gives no other information than that.
- --relative-timestamps
-
Print a timestamp relative to the beginning of the connection
before each line.
Note that the time a packet is printed is between the time a packet is received and the time a packet is sent, but it gives no other information than that.
- --monotonic-timestamps
-
Print a CLOCK_MONOTONIC (see
clock_gettime(3))
timestamp each time a package is printed.
This is likely to be the uptime of your system.
Note that the time a packet is printed is between the time a packet is received and the time a packet is sent, but it gives no other information than that.
- --print-offsets
- Print offsets of all fields (useful to debug nested lists in protocol descriptions)
- --print-counts
- Print counts (useful to debug lists in protocol descriptions)
ENVIRONMENT VARIABLES
- DISPLAY
- Without --display the content of this variable is used to determine the server to connect to. (And without -n given to xauth to get the authentication tokens for this display.)
- FAKEDISPLAY
- Without --fakedisplay the content of this variable is used to determine how to listen for clients. (And without -n given to xauth to set the authentication tokens for this display.) If neither is given, xtrace will try :9
- XAUTHORITY
-
Without -n and without -f or -F your xauth
program will most likely look into this variable for the file
to get/save the authentication tokens from/into. If this is not
set it will most likely use $HOME/.Xauthority.
REPORTING BUGS
Report bugs to <[email protected]> or the Debian BTS.COPYRIGHT
Copyright © 2005 Bernhard R. LinkThis is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.