Write a program in C...

Your programs should only use system calls for obtaining input and generating output. For example, use read() and write() system calls instead of C library functions (e.g. scanf or printf) to fetch input and display output.

The program should accept only one string argument that will be used to create a new file. Your program should check that the argument is valid and that the file doesnt already exist. The filter program then reads from STDIN and writes to both STDOUT and to the (newly created) file. Any error messages to be displayed should be sent to STDERR.