new source committed

Practice_05/ipcShared_customer.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";
+
+    int shm_fd;
+    char* ptr;
+
+    shm_fd = shm_open(shmName, O_RDONLY, 0666);
+    ptr = (char*)mmap(0, shmSize, PROT_READ, MAP_SHARED, shm_fd, 0);
+
+    printf("%s", (char*)ptr);
+
+    shm_unlink(shmName);
+
+    return 0;
+}