stuff

Examples/ipc/ipcmsg_gfg_r.c

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+// C Program for Message Queue (Reader Process)
+#include <stdio.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
+
+// structure for message queue
+struct mesg_buffer
+{
+    long mesg_type;
+    char mesg_text[100];
+} message;
+
+int main()
+{
+    key_t key;
+    int msgid;
+
+    // ftok to generate unique key
+    key = ftok("progfile", 65);
+
+    // msgget creates a message queue
+    // and returns identifier
+    msgid = msgget(key, 0666 | IPC_CREAT);
+
+    // msgrcv to receive message
+    msgrcv(msgid, &message, sizeof(message), 0, 0);
+    printf("Data Received is : %s \n", message.mesg_text);
+    msgrcv(msgid, &message, sizeof(message), 0, 0);
+    printf("Data Received is : %s \n", message.mesg_text);
+    msgrcv(msgid, &message, sizeof(message), 0, 0);
+    printf("Data Received is : %s \n", message.mesg_text);
+    msgrcv(msgid, &message, sizeof(message), 0, 0);
+    printf("Data Received is : %s \n", message.mesg_text);
+
+    // to destroy the message queue
+    msgctl(msgid, IPC_RMID, NULL);
+
+    return 0;
+}