Thread: Child process status when command doesn't exist/path iis worng

Hi, I have this program which gets two arguments as parameters and runs it in linux:

Code:

 int main(int argc, char *argv[])
{
 
    int status;
    pid_t pid;
    pid = fork();
    if(pid == 0)
       execvp(argv[1],argv+1);
    else if (pid >0) {
            /*this is the part of the code I'm missing*/
            }
    return 0;
}

I need to capture if the parameters passed are not a valid UX command.
I've tried WIFEXITED and WEXISTSTATUS but they always return "1" whether it's a valid linux command or not. Is there a way to know if the linux command wwhich the child process is running doesn't exist?