Hi Monks!
Under a UNIX system, I want to create a sub which gets a path and resolves any env in the path. My current code is: 
sub resolve_env_in_path {
    my ($path) = @_;
    $path =~ s/\$\{(\w+)\}/$ENV{$1}/g;
    $path =~ s/\$(\w+)/$ENV{$1}/g;
    return $path;
}

[download]
It works ok but I have two problems I'm trying to solve:
1. I don't resolve multi envs in the path.
2. I don't check if $ENV{$1} is defined. Actually there could be paths like /a/b/c/file$ or /a/b/c/fi$le where $ is just inside the path (no such env).
To solve the first problem, I could do a while loop and try to replace every single env, until there is no envs left. But how do I treat the second problem?

In reply to How to replace envs in path? by ovedpo15

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