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1.
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#undef _FILE_OFFSET_BITS
#define _FILE_OFFSET_BITS 64
#include <unistd.h>
#include <dirent.h>
fopen64()
2.
º¯Êý£ºperror
NAME
perror - print a system error message
SYNOPSIS
#include <stdio.h>
void perror(const char *s);
#include <errno.h>
const char *sys_errlist[];
int sys_nerr;
int errno;
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