1 files changed, 55 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/11.7.c b/reference/C/CONTRIB/OR_USING_C/11.7.c
new file mode 100644
index 0000000..c21a168
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/11.7.c
@@ -0,0 +1,55 @@
+/*
+ * shm-client - client program to demonstrate shared memory.
+ */
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <stdio.h>
+
+#define SHMSZ     27
+
+main()
+{
+    int shmid;
+    key_t key;
+    char *shmat();
+    char *shm, *s;
+
+    /*
+     * We need to get the segment named
+     * "5678", created by the server.
+     */
+    key = 5678;
+
+    /*
+     * Locate the segment.
+     */
+    if ((shmid = shmget(key, SHMSZ, 0666)) < 0) {
+        perror("shmget");
+        exit(1);
+    }
+
+    /*
+     * Now we attach the segment to our data space.
+     */
+    if ((shm = shmat(shmid, NULL, 0)) == (char *) -1) {
+        perror("shmat");
+        exit(1);
+    }
+
+    /*
+     * Now read what the server put in the memory.
+     */
+    for (s = shm; *s != NULL; s++)
+        putchar(*s);
+    putchar('\n');
+
+    /*
+     * Finally, change the first character of the 
+     * segment to '*', indicating we have read 
+     * the segment.
+     */
+    *shm = '*';
+
+    exit(0);
+}