obtain size of block of memory allocated from heap NAME malloc_usable_size - obtain size of block of memory allocated from heap LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #…get list of groups to which a user belongs NAME getgrouplist - get list of groups to which a user belongs LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include <grp.h> int ge…delimited string input NAME getline, getdelim - delimited string input LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include <stdio.h> ssize_t getline(char **restrict lineptr…delimited string input NAME getline, getdelim - delimited string input LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include <stdio.h> ssize_t getline(char **restrict lineptr…