I am currently writing a program that requires me to find certain files in map based on their permissions and use "munmap" to unmap them. I have done this but munmap needs the address of the file, which I have stored in a char array in hexadecimal. Is there a way for me to create a pointer that points to the hexadecimal address I have stored in the char array? The only thing I can find is how to hard code it and I can't do this because each mapping is different.
Since the address is in hexa, it contains letters as well. aoti and scanf seem to only convert numbers. Trying to use "munmap(2)" - the parameters are 1) a pointer to the starting address and 2) the length to be unmapped. I have the starting address, but it is stored as a hexadecimal in a char array (i.e 0x7fa2c0e77000). I'm essentially trying to find a way to create a pointer that points to the hexadecimal address stored in the char array, not the actual array itself.
char Memory_Start; // contains 12 bit hexadecimal address with '0x' at start and is null terminated.
Trying to create a pointer that points to the hexadecimal address INSIDE the char array.