LINUX用C检查文件的大小的代码

#include <sys/stat.h>
unsigned long get_file_size(const char *pPath)
{
    unsigned long nFileSize = -1;
    struct stat statbuff;
    if (stat(pPath, &statbuff) >= 0)
    {
        nFileSize = statbuff.st_size;
    }
    return nFileSize;
}  

unsigned long get_file_size2(const char *pPath)
{
    unsigned long nFileSize = -1;
    FILE *pFile;
    pFile = fopen(pPath, "r");
    if(pFile)
    {
        fseek(pFile, 0L, SEEK_END);
        nFileSize = ftell(pFile);
        fclose(pFile);
    }
    return nFileSize;
}