new file mode 100644
--- /dev/null
+++ b/restartOp.h
@@ -0,0 +1,80 @@
+/*
+    Signal interruptible fonctions handlers
+*/
+
+
+
+#ifndef    RESTARTOP_H
+#define    RESTARTOP_H
+
+#include <sys/types.h>
+#include <sys/sem.h>
+#include <sys/socket.h>
+
+/********************************************************/
+/*                        fork                          */
+/********************************************************/
+
+extern pid_t fork_rs(void);
+
+/********************************************************/
+/*                   wait, waitpid                      */
+/********************************************************/
+
+//extern pid_t wait_rs(int *status);
+//extern pid_t waitpid_rs(pid_t pid, int *status, int options);
+
+/********************************************************/
+/*                         sleep                        */
+/********************************************************/
+ 
+extern unsigned int sleep_rs(unsigned int seconds);
+
+/********************************************************/
+/*                   read, write, close                 */
+/********************************************************/
+
+//extern ssize_t read_rs(int fd, void *buf, size_t len);
+//extern ssize_t write_rs(int fd, const void *buf, size_t count);
+//extern int     close_rs(int fd);
+
+/********************************************************/
+/*                        dup, dup2                     */
+/********************************************************/
+
+//extern int dup_rs(int oldfd);
+//extern int dup2_rs(int oldfd, int newfd);
+
+/********************************************************/
+/*                        semop                         */
+/********************************************************/
+//extern int semop_rs(int semid, struct sembuf *sops,unsigned nsops);
+
+/********************************************************/
+/*                      msgsnd, msgrcv                  */
+/********************************************************/
+
+//extern int msgsnd_rs(int msqid, /* const */ void* msgp, int msgsz, int msgflg);
+//extern int msgrcv_rs(int msqid, void* msgp, int msgsz, long msgtyp,int msgflg);
+
+/********************************************************/
+/*                     connect, accept                  */
+/********************************************************/
+
+//extern int connect_rs(int sockfd, struct sockaddr *serv_addr,socklen_t addrlen);
+//extern int accept_rs(int sockfd, struct sockaddr *addr,socklen_t *addrlen);
+
+/********************************************************/
+/*                     recv, send                       */
+/********************************************************/
+
+//extern ssize_t recv_rs(int sockfd, void *buf, size_t len, int flags);
+//extern ssize_t send_rs(int sockfd, const void *buf, size_t count, int flags);
+
+/********************************************************/
+/*                   recvfrom, sendto                   */
+/********************************************************/
+extern ssize_t recvfrom_rs(int sockfd, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen);
+//extern ssize_t sendto_rs(int sockfd, const void *msg, size_t count, int flags, const struct sockaddr *to, socklen_t tolen);
+
+#endif  /* RESTARTOP_H */