unix: check error for Getresuid and Getresgid

Author: oxzi

unix/syscall_linux.go

@@ -2420,19 +2420,23 @@ func PthreadSigmask(how int, set, oldset *Sigset_t) error {
 	return rtSigprocmask(how, set, oldset, _C__NSIG/8)
 }
 
-//sysnb	getresuid(ruid *_C_int, euid *_C_int, suid *_C_int)
-//sysnb	getresgid(rgid *_C_int, egid *_C_int, sgid *_C_int)
+//sysnb	getresuid(ruid *_C_int, euid *_C_int, suid *_C_int) (err error)
+//sysnb	getresgid(rgid *_C_int, egid *_C_int, sgid *_C_int) (err error)
 
-func Getresuid() (ruid, euid, suid int) {
+func Getresuid() (ruid, euid, suid int, err error) {
 	var r, e, s _C_int
-	getresuid(&r, &e, &s)
-	return int(r), int(e), int(s)
+	if err = getresuid(&r, &e, &s); err != nil {
+		return
+	}
+	return int(r), int(e), int(s), err
 }
 
-func Getresgid() (rgid, egid, sgid int) {
+func Getresgid() (rgid, egid, sgid int, err error) {
 	var r, e, s _C_int
-	getresgid(&r, &e, &s)
-	return int(r), int(e), int(s)
+	if err = getresgid(&r, &e, &s); err != nil {
+		return
+	}
+	return int(r), int(e), int(s), err
 }
 
 /*