/* * datasize.c -- print the size of common data items * This runs with any Linux kernel (not any Unix, because of <linux/types.h>) * * Copyright (C) 2001 Alessandro Rubini and Jonathan Corbet * Copyright (C) 2001 O'Reilly & Associates * * The source code in this file can be freely used, adapted, * and redistributed in source or binary form, so long as an * acknowledgment appears in derived source files.  The citation * should list that the code comes from the book "Linux Device * Drivers" by Alessandro Rubini and Jonathan Corbet, published * by O'Reilly & Associates.   No warranty is attached; * we cannot take responsibility for errors or fitness for use. */#include <stdio.h>#include <sys/utsname.h>#include <linux/types.h>int main(int argc, char **argv){    struct utsname name;    uname(&name); /* never fails :) */    printf("arch   Size:  char  short  int  long   ptr long-long "	   " u8 u16 u32 u64\n");    printf(       "%-12s  %3i   %3i   %3i   %3i   %3i   %3i      "	   "%3i %3i %3i %3i\n",	   name.machine,	   (int)sizeof(char), (int)sizeof(short), (int)sizeof(int),	   (int)sizeof(long),	   (int)sizeof(void *), (int)sizeof(long long), (int)sizeof(__u8),	   (int)sizeof(__u16), (int)sizeof(__u32), (int)sizeof(__u64));    return 0;}