t21.c

ALL LINUX LAB PROGRAM MIT MANIPAL 2008-09 BATCH

#include<stdio.h>
#include<fcntl.h>
main()
{
	int fd;
	char fname[20],c;
	printf("Enter the file name ");
	scanf("%s",fname);
	fd=creat(fname,0764);
	if(fd<0)
		printf("Cannot create file");
	else
	{
		fd=open(fname,1);
		if(fd<0)
			printf("File cannot open");
		else
		{
			while((c=getchar())!='#')
				write(fd,&c,1);
			close(fd);
			fd=open(fname,0);
			if(fd<0)
				printf("Cannot open file");
			else
			{
				while((read(fd,&c,1))!=0)
					putchar(c);
			}
			close(fd);
		}
	}
}