In C how to make a function equivalent to malloc without using any other inbuilt function?

Question

Does there exist any way to make the command line arguments available to other functions without passing them as arguments to the function in C programming?

Answer 1

brk and sbrk are basic memory management system calls used in Unix and Unix-like operating systems to control the amount of memory allocated to the data segment of the process.
These functions are typically called from a higher-level memory management library function such as malloc. In the original Unix system, brk and sbrk were the only ways in which applications could acquire additional data space; later versions allowed this to also be done using the mmap call.