program to copy a file

Aim: Write a program to copy a file.

Program:

#include<stdio.h>

#include<fcntl.h>

#define buf 2048

int main(int argc, char *argv[])

{

          int fd,fd1;

          char buf1[buf];

          fd=open(argv[1],O_RDWR);

read(fd,buf1,buf);

fd1=creat(argv[2],O_WRONLY);

          write(fd1,buf1,buf);

close(fd);

close(fd1);

}

Output:

$ cat aa.txt

HELLO

$ cc copy.c

$ ./a.out aa.txt a.txt

$ cat a.txt

HELLO