?? datasize.c
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/* * 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;}
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