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xtrace(1) [debian man page]

XTRACE(1)							      XTRACE								 XTRACE(1)

NAME
xtrace - trace communication between X11 client and server 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, theoreti- cally) human readable form. If a command is given, xtrace executes the named command with $DISPLAY set to the faked X server. If that com- mand 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 connec- tions 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 back- ground). -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 any- way 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 num- ber 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 authentica- tion tokens from/into. If this is not set it will most likely use $HOME/.Xauthority. REPORTING BUGS
Report bugs to <brlink@debian.org> or the Debian BTS. SEE ALSO
xauth(1), x(7x), COPYRIGHT
Copyright (C) 2005 Bernhard R. Link This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. xtrace 26 June 2009 XTRACE(1)
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