From 17629b9ce63dba6aa4146d483cd61448cddb1fa5 Mon Sep 17 00:00:00 2001
From: Duncan Overbruck <mail@duncano.de>
Date: Thu, 12 Nov 2020 21:26:04 +0100
Subject: [PATCH] configure: add setresgid, setreuid and setregid checks

---
 configure | 42 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index d6c85af..0dfc649 100755
--- a/configure
+++ b/configure
@@ -384,9 +384,47 @@ int main(void) {
 	setresuid(0, 0, 0);
 	return 0;
 }'
-check_func "setresuid" "$src" || {
+check_func "setresuid" "$src"
+have_setresuid=$?
+
+#
+# Check for setresgid().
+#
+src='
+#include <unistd.h>
+int main(void) {
+	setresgid(0, 0, 0);
+	return 0;
+}'
+check_func "setresgid" "$src"
+have_setresgid=$?
+
+if [ $have_setresuid -eq 1 -o $have_setresgid -eq 1 ]; then
 	printf 'SRCS +=	libopenbsd/bsd-setres_id.c\n' >>$CONFIG_MK
-}
+fi
+
+#
+# Check for setreuid().
+#
+src='
+#include <unistd.h>
+int main(void) {
+	setreuid(0, 0);
+	return 0;
+}'
+check_func "setreuid" "$src"
+
+
+#
+# Check for setregid().
+#
+src='
+#include <unistd.h>
+int main(void) {
+	setregid(0, 0);
+	return 0;
+}'
+check_func "setregid" "$src"
 
 #
 # Check for closefrom().
-- 
2.39.2