diff --git a/TMP/Practice/04.10/output/mykey b/TMP/Practice/04.10/output/mykey
new file mode 100644
index 0000000..e69de29
diff --git a/TMP/Practice/04.10/output/mykey2 b/TMP/Practice/04.10/output/mykey2
new file mode 100644
index 0000000..e69de29
diff --git a/TMP/Practice/04.10/shmat/svshm_string.h b/TMP/Practice/04.10/shmat/svshm_string.h
new file mode 100644
index 0000000..9eabd8a
--- /dev/null
+++ b/TMP/Practice/04.10/shmat/svshm_string.h
@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <unistd.h>
+
+static void
+usage(const char *pname)
+{
+    fprintf(stderr, "Usage: %s [-cx] pathname proj-id num-sems\n",
+            pname);
+    fprintf(stderr, "    -c           Use IPC_CREAT flag\n");
+    fprintf(stderr, "    -x           Use IPC_EXCL flag\n");
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[])
+{
+    int semid, nsems, flags, opt;
+    key_t key;
+
+    flags = 0;
+    while ((opt = getopt(argc, argv, "cx")) != -1)
+    {
+        switch (opt)
+        {
+        case 'c':
+            flags |= IPC_CREAT;
+            break;
+        case 'x':
+            flags |= IPC_EXCL;
+            break;
+        default:
+            usage(argv[0]);
+        }
+    }
+
+    if (argc != optind + 3)
+        usage(argv[0]);
+
+    key = ftok(argv[optind], argv[optind + 1][0]);
+    if (key == -1)
+    {
+        perror("ftok");
+        exit(EXIT_FAILURE);
+    }
+
+    nsems = atoi(argv[optind + 2]);
+
+    semid = semget(key, nsems, flags | 0600);
+    if (semid == -1)
+    {
+        perror("semget");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("ID = %d\n", semid);
+
+    exit(EXIT_SUCCESS);
+}
diff --git a/TMP/Practice/04.10/shmat/svshm_string_read.c b/TMP/Practice/04.10/shmat/svshm_string_read.c
new file mode 100644
index 0000000..9eabd8a
--- /dev/null
+++ b/TMP/Practice/04.10/shmat/svshm_string_read.c
@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <unistd.h>
+
+static void
+usage(const char *pname)
+{
+    fprintf(stderr, "Usage: %s [-cx] pathname proj-id num-sems\n",
+            pname);
+    fprintf(stderr, "    -c           Use IPC_CREAT flag\n");
+    fprintf(stderr, "    -x           Use IPC_EXCL flag\n");
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[])
+{
+    int semid, nsems, flags, opt;
+    key_t key;
+
+    flags = 0;
+    while ((opt = getopt(argc, argv, "cx")) != -1)
+    {
+        switch (opt)
+        {
+        case 'c':
+            flags |= IPC_CREAT;
+            break;
+        case 'x':
+            flags |= IPC_EXCL;
+            break;
+        default:
+            usage(argv[0]);
+        }
+    }
+
+    if (argc != optind + 3)
+        usage(argv[0]);
+
+    key = ftok(argv[optind], argv[optind + 1][0]);
+    if (key == -1)
+    {
+        perror("ftok");
+        exit(EXIT_FAILURE);
+    }
+
+    nsems = atoi(argv[optind + 2]);
+
+    semid = semget(key, nsems, flags | 0600);
+    if (semid == -1)
+    {
+        perror("semget");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("ID = %d\n", semid);
+
+    exit(EXIT_SUCCESS);
+}
diff --git a/TMP/Practice/04.10/shmat/svshm_string_write.c b/TMP/Practice/04.10/shmat/svshm_string_write.c
new file mode 100644
index 0000000..9eabd8a
--- /dev/null
+++ b/TMP/Practice/04.10/shmat/svshm_string_write.c
@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#include <unistd.h>
+
+static void
+usage(const char *pname)
+{
+    fprintf(stderr, "Usage: %s [-cx] pathname proj-id num-sems\n",
+            pname);
+    fprintf(stderr, "    -c           Use IPC_CREAT flag\n");
+    fprintf(stderr, "    -x           Use IPC_EXCL flag\n");
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[])
+{
+    int semid, nsems, flags, opt;
+    key_t key;
+
+    flags = 0;
+    while ((opt = getopt(argc, argv, "cx")) != -1)
+    {
+        switch (opt)
+        {
+        case 'c':
+            flags |= IPC_CREAT;
+            break;
+        case 'x':
+            flags |= IPC_EXCL;
+            break;
+        default:
+            usage(argv[0]);
+        }
+    }
+
+    if (argc != optind + 3)
+        usage(argv[0]);
+
+    key = ftok(argv[optind], argv[optind + 1][0]);
+    if (key == -1)
+    {
+        perror("ftok");
+        exit(EXIT_FAILURE);
+    }
+
+    nsems = atoi(argv[optind + 2]);
+
+    semid = semget(key, nsems, flags | 0600);
+    if (semid == -1)
+    {
+        perror("semget");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("ID = %d\n", semid);
+
+    exit(EXIT_SUCCESS);
+}