stuff

Examples/ipc/ipcmsg_gfg_s.c

@@ -0,0 +1,46 @@
+// C Program for Message Queue (Writer Process)
+#include <stdio.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
+#define MAX 10
+
+// structure for message queue
+struct mesg_buffer
+{
+    long mesg_type;
+    char mesg_text[100];
+} m1, m2, m3, m4;
+
+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);
+    m1.mesg_type = 1;
+    m2.mesg_type = 2;
+    m3.mesg_type = 3;
+    m4.mesg_type = 4;
+
+    printf("Write Data : ");
+    fgets(m1.mesg_text, MAX, stdin);
+    fgets(m2.mesg_text, MAX, stdin);
+    fgets(m3.mesg_text, MAX, stdin);
+    fgets(m4.mesg_text, MAX, stdin);
+
+    // msgsnd to send message
+    msgsnd(msgid, &m1, sizeof(m1), 0);
+    msgsnd(msgid, &m2, sizeof(m2), 0);
+    msgsnd(msgid, &m3, sizeof(m3), 0);
+    msgsnd(msgid, &m4, sizeof(m4), 0);
+
+    // display the message
+    // printf("Data send is : %s \n", message.mesg_text);
+
+    return 0;
+}