diff --git a/libc/inc/ipc/sem.h b/libc/inc/ipc/sem.h
index 6d5f0c9..3c01a3e 100644
--- a/libc/inc/ipc/sem.h
+++ b/libc/inc/ipc/sem.h
@@ -10,6 +10,42 @@
 #include "time.h"
 #include "ipc.h"
 
+
+
+/// @brief flags for semop
+#define SEM_UNDO	0x1000		/* undo the operation on exit */
+
+
+/// #brief Commands for semctl
+#define GETPID		11		/* get sempid */
+#define GETVAL		12		/* get semval */
+#define GETALL		13		/* get all semval's */
+#define GETNCNT		14		/* get semncnt */
+#define GETZCNT		15		/* get semzcnt */
+#define SETVAL		16		/* set semval */
+#define SETALL		17		/* set all semval's */
+
+
+
+
+
+/// @brief Optional argument for semctl() function
+union semun {
+    int val;                /* value for SETVAL */
+    struct semid_ds *buf;   /* buffer for IPC_STAT & IPC_SET */
+    unsigned short *array;  /* array for GETALL & SETALL */
+    struct seminfo *__buf;  /* buffer for IPC_INFO */
+};
+
+/// @brief Semaphore set
+struct semid_ds {
+    struct ipc_perm sem_perm;  /* Ownership and permissions */
+    time_t          sem_otime; /* Last semop time */
+    time_t          sem_ctime; /* Last change time */
+    unsigned long   sem_nsems; /* No. of semaphores in set */
+};
+
+
 /// @brief Buffer to use with the semaphore IPC.
 struct sembuf {
     /// Semaphore index in array.
@@ -20,6 +56,10 @@ struct sembuf {
     short sem_flg;
 };
 
+
+
+
+
 #ifdef __KERNEL__
 
 /// @brief Get a System V semaphore set identifier.
diff --git a/mentos/src/ipc/sem.c b/mentos/src/ipc/sem.c
index 3818eb4..6f4ff9a 100644
--- a/mentos/src/ipc/sem.c
+++ b/mentos/src/ipc/sem.c
@@ -9,13 +9,16 @@
 #define __DEBUG_HEADER__ "[IPCsem]"      ///< Change header.
 #define __DEBUG_LEVEL__  LOGLEVEL_NOTICE ///< Set log level.
 #include "io/debug.h"                    // Include debugging functions.
-
-#include "ipc/sem.h"
+#include <stdio.h> //test
+#include "ipc/sem.h" //test
 #include "system/panic.h"
 
+
+//test
 long sys_semget(key_t key, int nsems, int semflg)
 {
-    TODO("Not implemented");
+    printf("qui");
+    //TODO("Not implemented");
     return 0;
 }
 
diff --git a/programs/tests/CMakeLists.txt b/programs/tests/CMakeLists.txt
index 22d2855..639b232 100644
--- a/programs/tests/CMakeLists.txt
+++ b/programs/tests/CMakeLists.txt
@@ -85,6 +85,7 @@ set(TESTS
     t_kill.c
     t_itimer.c
     t_gid.c
+    t_semget.c
 )
 
 foreach(TEST ${TESTS})
diff --git a/programs/tests/t_semget.c b/programs/tests/t_semget.c
new file mode 100644
index 0000000..00f7899
--- /dev/null
+++ b/programs/tests/t_semget.c
@@ -0,0 +1,8 @@
+//testtt
+#include <ipc/sem.h>
+int main()
+{
+    long i = semget(0,0,0);
+    
+    return 0;
+}