diff --git a/libs/libc/include/unistd.h b/libs/libc/include/unistd.h
index ff770cc3..26bb30ce 100644
--- a/libs/libc/include/unistd.h
+++ b/libs/libc/include/unistd.h
@@ -50,6 +50,18 @@ extern "C"
     /* Returns the current process' effective group ID. */
     gid_t getegid(void);
 
+    /* Sets the current process' real and effective user IDs. */
+    int setuid(uid_t uid);
+
+    /* Sets the current process' effective user ID. */
+    int seteuid(uid_t uid);
+
+    /* Sets the current process' real and effective group IDs. */
+    int setgid(gid_t gid);
+
+    /* Sets the current process' effective group ID. */
+    int setegid(gid_t gid);
+
     /* Terminates the program with the status code status. */
     __lc_noreturn void _exit(int status);
 
diff --git a/libs/libc/src/unistd.cpp b/libs/libc/src/unistd.cpp
index ab4c9421..a781339f 100644
--- a/libs/libc/src/unistd.cpp
+++ b/libs/libc/src/unistd.cpp
@@ -58,6 +58,26 @@ extern "C"
         return (gid_t)getprocid(ID_EGID);
     }
 
+    int setuid(uid_t uid)
+    {
+        return (int)__lc_fast_syscall2(SYS_setuid, uid, uid);
+    }
+
+    int seteuid(uid_t uid)
+    {
+        return (int)__lc_fast_syscall2(SYS_setuid, getprocid(ID_UID), uid);
+    }
+
+    int setgid(gid_t gid)
+    {
+        return (int)__lc_fast_syscall2(SYS_setgid, gid, gid);
+    }
+
+    int setegid(gid_t gid)
+    {
+        return (int)__lc_fast_syscall2(SYS_setgid, getprocid(ID_GID), gid);
+    }
+
     unsigned int sleep(unsigned int seconds)
     {
         return msleep(seconds * 1000);