// md: target should be a series of blank-delimited directories to be created
//     If an element is a whildcard, the directory will always be created,
//     using mkdir -p.
//
//     uses: run()

void md(string target)
{
    int idx;
    list paths;
    string dir;

    paths = strtok(target, " ");

    for (idx = sizeof(paths); idx--; )
    {
        dir = element(idx, paths);
        if (!exists(dir))
            run("mkdir -p " + dir);
    }
}