I don't think its possible to do that in eclipse with any preference setting. However, you can modify the cvs configuration file to add default options to commands here are some examples:
The `~/.cvsrc' file is a way that you can add default options to cvs_commands within cvs, instead of relying on aliases or other shell scripts.
The format of the `~/.cvsrc' file is simple. The file is searched for a line that begins with the same name as the cvs_command being executed. If a match is found, then the remainder of the line is split up (at whitespace characters) into separate options and added to the command arguments before any options from the command line.
If a command has two names (e.g., checkout and co), the official name, not necessarily the one used on the command line, will be used to match against the file. So if this is the contents of the user's `~/.cvsrc' file:
log -N
diff -u
update -P
checkout -P
the command cvs checkout foo' would have the
-P' option added to the arguments, as well as `cvs co foo'.
So I would suggest adding this
update -q
to that file which eclipse should then by default append. Hope that works. - Duncan