gistfile1.c

#include <stdio.h>                                                              
#include <sys/types.h>                                                          
#include <sys/stat.h>                                                              
#include <fcntl.h>                                                                 
#include <unistd.h>                                                                
                                                                                   
#define BUF_SIZE 128                                                               

int main() {                                                                       
    char *path= "/tmp/file";                                                       
    char *buf[BUF_SIZE];                                                           
                                                                                   
    int fd = open(path, O_RDONLY);                                                 
    int size = 0;                                                                  
    while((size = read(fd, buf, BUF_SIZE)) != 0) {                                                                     
        write(1, buf, size);                                                       
    }                                                                              
    return 0;                                                                      
}