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16_Named_Pipe_Sort_Array_P2.c
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16_Named_Pipe_Sort_Array_P2.c
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// Q. Transfer an unsorted array from program1 to read by program2
// and then after sorting that array sent it back using Named Pipe.
// Execute the programs in separate terminals.
// program1 --> 15_Named_Pipe_Sort_Array_P1.c
// program2 --> 15_Named_Pipe_Sort_Array_P2.c
// **Note: This program or transfer will work only if both the sender and receiver is available
// Receiver
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
// Swap function
void swap(int *x, int *y)
{
int temp = *x;
*x = *y;
*y = temp;
}
int main()
{
int n = 5, res;
int buf[5];
// Open named pipe
res = open("nPipe2", O_RDWR);
// Read message
read(res, buf, sizeof(buf));
printf("P2: Unsorted array received to process pid: %d.\n", getpid());
// Sort array
int i, j;
for (i = 0; i < n - 1; i++)
{
for (j = 0; j < n - i - 1; j++)
{
if (buf[j] > buf[j + 1])
swap(&buf[j], &buf[j + 1]);
}
}
printf("P2: Array sorted!\n");
// Send sorted array to P1
write(res, buf, sizeof(buf));
printf("P2: Sorted array sent back from process pid: %d.\n", getpid());
}
/*
Output:
[Terminal 1]
s4shibam@SHIBAM:~/OS$ gcc 16_Named_Pipe_Sort_Array_P1.c -o p1.out
s4shibam@SHIBAM:~/OS$ ./p1.out
Named pipe created successfully!
Enter 5 array elements (space-separated): 56 87 90 21 45
P1: Unsorted array sent from process pid: 602.
P1: Sorted array received to process pid: 602.
P1 says: Sorted Array: 21 45 56 87 90
s4shibam@SHIBAM:~/OS$
[Terminal 2]
s4shibam@SHIBAM:~/OS$ gcc 16_Named_Pipe_Sort_Array_P2.c -o p2.out
s4shibam@SHIBAM:~/OS$ ./p2.out
P2: Unsorted array received to process pid: 603.
P2: Array sorted!
P2: Sorted array sent back from process pid: 603.
s4shibam@SHIBAM:~/OS$
*/