The single parameter is an argv-style list of arguments.
The first element is the name of the program to run.
Subsequent elements are parameters. The list must be
-non-empty (ie. must contain a program name).
+non-empty (ie. must contain a program name). Note that
+the command runs directly, and is I<not> invoked via
+the shell (see C<sh>).
The return value is anything printed to I<stdout> by
the command.
This is the same as C<command>, but splits the
result into a list of lines.
+See also: C<sh-lines>
+
Because of the message protocol, there is a transfer limit
of somewhere between 2MB and 4MB. To transfer large files you should use
FTP.
This returns the verbose messages flag.
+=head2 glob-expand
+
+ glob-expand pattern
+
+This command searches for all the pathnames matching
+C<pattern> according to the wildcard expansion rules
+used by the shell.
+
+If no paths match, then this returns an empty list
+(note: not an error).
+
+It is just a wrapper around the C L<glob(3)> function
+with flags C<GLOB_MARK|GLOB_BRACE>.
+See that manual page for more details.
+
=head2 grub-install
grub-install root device
human-readable output of the L<sfdisk(8)> command. It is
not intended to be parsed.
+=head2 sh
+
+ sh command
+
+This call runs a command from the guest filesystem via the
+guest's C</bin/sh>.
+
+This is like C<command>, but passes the command to:
+
+ /bin/sh -c "command"
+
+Depending on the guest's shell, this usually results in
+wildcards being expanded, shell expressions being interpolated
+and so on.
+
+All the provisos about C<command> apply to this call.
+
+=head2 sh-lines
+
+ sh-lines command
+
+This is the same as C<sh>, but splits the result
+into a list of lines.
+
+See also: C<command-lines>
+
=head2 sleep
sleep secs