linux 文件内容的复制

#include <string.h>

#include <strings.h>

#include <stdio.h>

#include <stdlib.h>

#define BUFFER_SIZE 1024 

int main(int argc,char **argv)

{

	FILE *from_fd;

	FILE *to_fd;

	long file_len=0;

	char buffer[BUFFER_SIZE];

	char *ptr; 

	/*判断入参*/

	if(argc!=3)

	{

		printf("Usage:%s fromfile tofile\n",argv[0]);

		exit(1);

	} 

/* 打开源文件 */

if((from_fd=fopen(argv[1],"rb"))==NULL)

{

	printf("Open %s Error\n",argv[1]);

	exit(1);

} 

/* 创建目的文件 */

if((to_fd=fopen(argv[2],"wb"))==NULL)

{

	printf("Open %s Error\n",argv[2]);

	exit(1);

} 

/*测得文件大小*/

fseek(from_fd,0L,SEEK_END);

file_len=ftell(from_fd);

fseek(from_fd,0L,SEEK_SET);

printf("from file size is=%d\n",file_len);

/*进行文件拷贝*/

while(!feof(from_fd))

{

	fread(buffer,BUFFER_SIZE,1,from_fd);

	if(BUFFER_SIZE>=file_len)

	{

		fwrite(buffer,file_len,1,to_fd);

	}

	else

	{

		fwrite(buffer,BUFFER_SIZE,1,to_fd);

		file_len=file_len-BUFFER_SIZE;

	}

	bzero(buffer,BUFFER_SIZE);

}

fclose(from_fd);

fclose(to_fd);

exit(0);

}
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linux 文件内容的复制

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