基于c语言实现linux的cp功能

仿linux的cp功能

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char **argv)
{
	int fdSrc, fdDes;
	char *readBuf = NULL;
	
	if (argc != 3)
	{
		printf("params error!\n");
		exit(-1);
	}
	
	fdSrc = open(argv[1], O_RDWR);
	int size = lseek(fdSrc, 0, SEEK_END);
	lseek(fdSrc, 0, SEEK_SET);
	
	printf("src size = %d\n", size);
	readBuf = (char *)malloc(sizeof(char) * size + 8);
	
	int n_read = read(fdSrc, readBuf, size);
	
	fdDes = open(argv[2], O_RDWR | O_CREAT | O_TRUNC, 0600);
	
	int n_write = write(fdDes, readBuf, strlen(readBuf));
	
	close(fdSrc);
	close(fdDes);
	
	return 0;
}