于 2013年03月21日 21:08, Eric Blake 写道:
On 03/21/2013 04:20 AM, Daniel P. Berrange wrote:
In other words, if we're going to do this, go all the way and use wordexp() to get shell-like expansion, instead of reinventing it ourselves. Except that wordexp() is not portable to mingw, and not provided in gnulib.
Also, we'll need a way to escape the special meaning of '~' and '$' to get them treated as literal characters instead of special characters.
We already have the ability to quote characters, so that we can embed spaces; our quoting rules are (intentionally) copied on shell rules, so they would still work with a wordexp() approach.
This seems better than just expanding $HOME, i will try this wordexp(). One question, is variable can be accepted in the position of command and option? That is, is this form virsh # $VAR --$OPT=~/rpmbuild could be valid?