1 files changed, 2 insertions, 0 deletions
diff --git a/user/user.h b/user/user.h
index a076f37..34591fd 100644
--- a/user/user.h
+++ b/user/user.h
@@ -33,6 +33,8 @@ int ugetpid(void);
 #endif
 int trace(int);
 int sysinfo(struct sysinfo*);
+int sigalarm(int ticks, void (*handler)());
+int sigreturn(void);
 
 // ulib.c
 int stat(const char*, struct stat*);