can any one give me detailed explanation of pipes??????

-Pipes are basically a tunnel to pass information from one process to another.
-When u create a pipe a memory is allocated in RAM viz. is accessible through its read and write file descriptor.

-Pipes are of 64k and works just like a circular queue.

To understand its working :  Assume it like a tube that is connecting to two processes. There is one way sending of data at a time.

For bater understanding about pipe read these examples:->

Example no. 1.:

#include<stdio.h>
#include<unistd.h>
int main()
{
        int fp[2],fp1[2],ret,ret1;
        ret = pipe(fp);
        ret1 = pipe(fp1);
        printf("fdr :=%d\nfdw:= %d\n",fp[0],fp[1]);
        printf("ret :=%d\n",ret);
        printf("fdr1 :=%d\nfdw:= %d\n",fp1[0],fp1[1]);
        printf("ret1 :=%d\n",ret1);
        return 0;
}
 
Example no. 2:

#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
int main()
{
        int fp[2],ret,countr,countw;
        char buf[20]="my name is ankit",buf1[20];
        ret = pipe(fp);
        printf("fdr :=%d\nfdw:= %d\n",fp[0],fp[1]);
        printf("ret :=%d\n",ret);
        countw=write(fp[1],buf,strlen(buf));
        if(countw==-1)
        {
                perror("write");
                EXIT_FAILURE;
        }
        countr=read(fp[0],buf1,20);
        if(countr==-1)
        {
                perror("read");
                EXIT_FAILURE;
        }
        printf("countw :=%d\ncountr:= %d\n",countw,countr);
        printf("data :=%s\n",buf1);
        return 0;
}

Above example shows :
* Generation of pipe or how to create  a pipe.
*File descriptor given by pipe.
*And how to write into the pipe and how to read from the pipe