NetSock | Simple and useful only for simple things C socket library

I am rewriting a simple reverse-shell program I made in python, now in C.

The program is supposed to be trying to connect to a host(netcat listening on the specified port) and then take the output from nc, sent over a tcp socket, and make a system call using popen() and then send back the terminal output via the socket connection to nc where it is displayed.

When I try sending commands the program returns what I requested, but also some giberish.

Ex.: /Users/jacob/Library/Developer/Xcode/DerivedData/backdoorfbhufkccmceisqaozrfitkmfsvge/Build/Products/Debu@Ԓ`? ??????0d?r?

(Output from nc in terminal, this was a 'pwd' command)

I also seem to have some kind of problem where a buffer isn't cleared? When I use the 'say' command(say [sentence] ) MacOS is supposed to use voice the sentence. This happens, but only the 2 first letters of the argument after 'say'(the 2 first characters of the sentence) and then says an earlier string. ('Successfully connected!')

Ex.: (command: 'say hello')

heSuccessfully connected!

I have tried to open the FILE stream in different places and

Code (after socket setup and connection):