FS-5: Manaul append

Description

Your task is to write a program on C/C++ that writes two lines in the files “first line” and “second line”. Writing should happen into two different file descriptors but write into the same file.

Requirements

• Write a C/C++ program that gets the filepath with the first argument and opens it.
• File should not be opened with the O_APPEND file.
• You are not allowed to use seek/lseek to move the cursor to the end.
• The program writes two lines: “first line” and “second line”. Each line is written in a different descriptor.
• After write, the file should contain both lines in the same file.

Hint: you may use dup/dup2.

Expected result

The resulting application should be able to build and execute from command line as follows:

make
./manual-append result.txt

The output file should contain the following text:

first line
second line

The final solution should contain a Makefile for the multi-stage build. The Makefile should also contain targets all and clean. It’s recommended to have compiler and compiler flags to be declared as a Makefile variables. Alternatively, cmake could also be used instead of make.