---------x    1 root     root          512 Oct 11 12:59 dst.txt

#include <stdio.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
	if (argc!=3)
	{
		printf("\nUSAGE: %s <source file name> <destination file name>\n",argv[0]);
		exit(1);
	}
	
	int src_handle,dst_handle;
	char buffer[512];
	const int bytes_read=512;
	int rd,wr;

	if ((src_handle=open(argv[1],O_RDONLY))==-1)
	{
		perror("Source File open read");
		exit(1);
	} 

	if ((dst_handle=open(argv[2],O_CREAT,O_WRONLY))==-1)
	{
		perror("Destination File create");
		exit(1);
	} 
	if ((dst_handle=open(argv[2],O_WRONLY))==-1)
	{
		perror("Destination File open write");
		exit(1);
	} 
	
	memset(buffer,'\0',512);
	while ((rd=read(src_handle,buffer,bytes_read*(sizeof(char))))!=0)
	{
		//printf("\nrd:= %d\n",rd);
		if (rd==-1)
		{
			printf("\nError reading source file\n");
			exit(1);
		}
		wr=write(dst_handle,buffer,bytes_read*(sizeof(char)));
		//printf("\nwr:= %d\n",wr);
		if (wr==-1)
		{
			printf("\nError writing to destination file\n");
			exit(1);
		}
	}
	
 return 0;
}

do{
  rd=read(src_handle,buffer,bytes_read*(sizeof(char)));
  if(rd>0)
    wr=write(dst_handle,buffer,rd);
}while(rd == bytes_read);

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

int main(int argv, char* argc[])
{
	struct stat buffer;
	
	if(argv!=3)
		printf("Program usage:\n\tfilestat <filename1> <filename2>\n\tfilename1 permissions/owner will be imposed on filename2.\n");
	else{
		if(!stat(argc[1],&buffer)){
			printf("Filename: %s\n",argc[1]);
			printf("------------------------------------------\n");
			printf("File owner is %d\n",buffer.st_uid);
			printf("File group is %d\n",buffer.st_gid);
			printf("File permisions are set to %o\n",buffer.st_mode);
			if(chmod(argc[2],buffer.st_mode))
				printf("Sorry, could not change the permissions of %s.\n",argc[2]);
			if(chown(argc[2],buffer.st_uid,buffer.st_gid))
				printf("Sorry. Could not change the owner of %s\n",argc[2]);
		}
		else
			printf("Sorry, %s is not a valid file.\n",argc[1]);
	}
	return 0;
}