first commit

Practice_05/ipcShared_producer.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/shm.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+int main(){
+    const int shmSize = 4096;
+    const char* shmName = "FOX";
+    const char* message_0 = "Hello, ";
+    const char* message_1 = "Shared Memory!\n";
+
+    int shm_fd;     // Shared memory to file descripter
+    char* ptr;      // Shared memory to pointer
+
+    shm_fd = shm_open(shmName, O_CREAT | O_RDWR, 0666);
+    ftruncate(shm_fd, shmSize);
+
+    ptr = (char*) mmap(0, shmSize, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0);
+
+    sprintf(ptr, "%s", message_0);
+    ptr += strlen(message_0);
+    sprintf(ptr, "%s", message_1);
+    ptr += strlen(message_1);
+
+    return 0;
+}