pwho is a software tool that allows programs to perform parallel whois queries. It enables efficient and faster retrieval of domain registration information.
The input process is as simple as it gets. All you have to do is provide the name and the IPv4 address of the whoisserver. The name should be a query without spaces, and the whoisserver must be an IPv4 address. The input process is also line-separated to make it easier for the user.
The output is just as simple. The output comprises of q, 0, and st. The q represents the input-line number in sequence-space. 0 represents that no further action is required after the lookup. The st denotes one of the following: permfail, which means that the name is not registered. Remotefail shows that there has been a temporary error, and the user should try again later. Ok indicates that the name is registered.
In the latest version of pwho, the developers have made a few updates to improve its performance. The pwho.c feature now waits, which causes kernel blocks. However, this update keeps the load down, which makes it more efficient than ever before. Now, pwho is the perfect tool for software developers who want accurate and reliable whois lookups for their programs.