Question

i have a file hello.txt
and a pointer *i pointing to the file, i have opened the file using c open(*i) function. i want to get the size of file using getpagesize(2) to read the content of the file and further write that content to a destination file. so getting the size of the file i required to now how big is the file and how much content there is to read.

Answer 1

If you are using the open system function to open the file, you should look into the fstat function to get the size:

int fd = open(...);

struct stat st;
fstat(fd, &st);

printf("File size: %ld bytes\n", st.st_size);