The Message structure and partial “server” code -using IPC mechanism message queue- seen below.a. Write needed code for creating message queueb. Write needed code for deleting message queuec. Write the corresponding partial “client” code for this partial server.Message Structure:typedef struct {long int msg_to; // Message in queue for this typelong int msg_fm; // Placed in the queue by this typechar buffer[BUFSIZ]; // The actual message}MESSAGE;Partial Server Code:1. while (1) {2. memset( msg.buffer, 0x0, BUFSIZ );3. if ((n=msgrcv(mid, &msg, BUFSIZ, SERVER, 0)) == -1 ) {4. perror("Server: msgrcv");5. return 2;6. } else if (n == 0) break;7. process_msg(msg.buffer, strlen(msg.buffer));8. msg.msg_to = msg.msg_fm;9. msg.msg_fm = SERVER;10. n += sizeof(msg.msg_fm);11. if (msgsnd(mid, &msg, n, 0) == -1 ) {12. perror("Server: msgsnd");13. return 3;14. }15. } 3.The Message structure and partial "server" code -using IPC mechanism message queue- seenbelow.Write needed code for creating message queueWrite needed code for deleting message queueWrite the corresponding partial “client" code for this partial server.а.b.C.Message Structure:typedef struct {long int msg_to;long int msg_fm;char buffer[BUFSIZ];}MESSAGE;// Message in queue for this type// Placed in the queue by this type// The actual messagePartial Server Code:while (1) {memset( msg.buffer, 0x0, BUFSIZ );if ((n=msgrcv(mid, &msg, BUFSIZ, SERVER, 0)) == -1 ) {perror("Server: msgrcv");return 2;} else if (n == 0) break;process_msg(msg.buffer, strlen(msg.buffer));msg.msg_to = msg.msg_fm;msg.msg_fm = SERVER;n += sizeof(msg.msg_fm);if (msgsnd(mid, &msg, n, 0) == -1){12.1.2.3.4.5.6.7.8.9.10.11.perror("Server: msgsnd");13.return 3;14. }15. }

It is defined as Inter process communication (IPC) is used for exchanging data between multiple…

Answered: Message structure and partial “server”…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

The Message structure and partial “server” code -using IPC mechanism message queue- seen below.
a. Write needed code for creating message queue
b. Write needed code for deleting message queue
c. Write the corresponding partial “client” code for this partial server.
Message Structure:
typedef struct {
long int msg_to; // Message in queue for this type
long int msg_fm; // Placed in the queue by this type
char buffer[BUFSIZ]; // The actual message
}MESSAGE;
Partial Server Code:
1. while (1) {
2. memset( msg.buffer, 0x0, BUFSIZ );
3. if ((n=msgrcv(mid, &msg, BUFSIZ, SERVER, 0)) == -1 ) {
4. perror("Server: msgrcv");
5. return 2;
6. } else if (n == 0) break;
7. process_msg(msg.buffer, strlen(msg.buffer));
8. msg.msg_to = msg.msg_fm;
9. msg.msg_fm = SERVER;
10. n += sizeof(msg.msg_fm);
11. if (msgsnd(mid, &msg, n, 0) == -1 ) {
12. perror("Server: msgsnd");
13. return 3;
14. }
15. }

3.
The Message structure and partial "server" code -using IPC mechanism message queue- seen
below.
Write needed code for creating message queue
Write needed code for deleting message queue
Write the corresponding partial “client" code for this partial server.
а.
b.
C.
Message Structure:
typedef struct {
long int msg_to;
long int msg_fm;
char buffer[BUFSIZ];
}MESSAGE;
// Message in queue for this type
// Placed in the queue by this type
// The actual message
Partial Server Code:
while (1) {
memset( msg.buffer, 0x0, BUFSIZ );
if ((n=msgrcv(mid, &msg, BUFSIZ, SERVER, 0)) == -1 ) {
perror("Server: msgrcv");
return 2;
} else if (n == 0) break;
process_msg(msg.buffer, strlen(msg.buffer));
msg.msg_to = msg.msg_fm;
msg.msg_fm = SERVER;
n += sizeof(msg.msg_fm);
if (msgsnd(mid, &msg, n, 0) == -1){
12.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
perror("Server: msgsnd");
13.
return 3;
14. }
15. }

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