diff --git a/sysdeps/linux/generic/sysdeps.cpp b/sysdeps/linux/generic/sysdeps.cpp
index f0560bd2..e7241b9f 100644
--- a/sysdeps/linux/generic/sysdeps.cpp
+++ b/sysdeps/linux/generic/sysdeps.cpp
@@ -38,6 +38,10 @@
 #define NR_kill 62
 #define NR_fcntl 72
 #define NR_unlink 87
+#define NR_getuid 102
+#define NR_getgid 104
+#define NR_geteuid 107
+#define NR_getegid 108
 #define NR_arch_prctl 158
 #define NR_sys_futex 202
 #define NR_clock_gettime 228
@@ -372,6 +376,30 @@ pid_t sys_getpid() {
 	return sc_int_result<pid_t>(ret);
 }
 
+uid_t sys_getuid() {
+	auto ret = do_syscall(NR_getuid);
+	// getuid() always succeeds.
+	return sc_int_result<pid_t>(ret);
+}
+
+uid_t sys_geteuid() {
+	auto ret = do_syscall(NR_geteuid);
+	// geteuid() always succeeds.
+	return sc_int_result<pid_t>(ret);
+}
+
+gid_t sys_getgid() {
+	auto ret = do_syscall(NR_getgid);
+	// getgid() always succeeds.
+	return sc_int_result<pid_t>(ret);
+}
+
+gid_t sys_getegid() {
+	auto ret = do_syscall(NR_getegid);
+	// getegid() always succeeds.
+	return sc_int_result<pid_t>(ret);
+}
+
 int sys_kill(int pid, int sig) {
 	auto ret = do_syscall(NR_kill, pid, sig);
 	if (int e = sc_error(ret); e)