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syscall-wrapper

System Call Wrappers​

Enter the support/syscall-wrapper/ folder and go through the practice items below. If you get stuck, take a sneak peek at the solutions in the solution/syscall-wrapper/ folder.

  1. Update the files in the syscall-wrapper/ folder to make the getpid system call available as a wrapper. Create a function with the signature unsigned int itoa(int n, char *a) that converts an integer to a string. It returns the number of digits in the string. For example, it will convert the number 1234 to the string "1234" string (NULL-terminated, 5 bytes long); the return value is 4 (the number of digits of the "1234" string).

    Then make the call to getpid; it gets no arguments and returns an integer (the PID - process ID of the current process).