1 files changed, 80 insertions, 0 deletions
diff --git a/portbash/syscalls.sh b/portbash/syscalls.sh
new file mode 100644
index 0000000..e89a742
--- /dev/null
+++ b/portbash/syscalls.sh
@@ -0,0 +1,80 @@
+#! /bin/sh
+CC=cc
+export CC
+
+cat > x.c << EOF
+/*
+ * exit 0 if we have the getgroups system or library call.
+ */
+
+main()
+{
+	int	g[100], ng;
+
+	ng = getgroups(100, g);
+	if (ng)
+		exit(0);
+	exit(1);
+}
+EOF
+if ${CC} x.c > /dev/null 2>&1 && ./a.out ; then
+	echo '#define HAVE_GETGROUPS'
+fi
+rm -f x.c x.o a.out
+
+cat > x.c << EOF
+extern int dup2();
+main()
+{
+	exit(dup2(1, 2) == -1);
+}
+EOF
+
+if ${CC} x.c > /dev/null 2>&1 && ./a.out ; then
+	echo '#define HAVE_DUP2'
+fi
+rm -f a.out x.c x.o
+
+cat > x.c << EOF
+extern int getpageesize();
+main()
+{
+	int n = getpagesize();
+}
+EOF
+
+if ${CC} x.c > /dev/null 2>&1
+then
+	echo '#define HAVE_GETPAGESIZE'
+fi
+rm -f a.out x.c x.o
+
+cat > x.c << EOF
+extern int getdtablesize();
+main()
+{
+	int n = getdtablesize();
+}
+EOF
+
+if ${CC} x.c > /dev/null 2>&1
+then
+	echo '#define HAVE_GETDTABLESIZE'
+fi
+rm -f a.out x.c x.o
+
+cat > x.c << EOF
+extern int setdtablesize();
+main()
+{
+	int n = setdtablesize(128);
+}
+EOF
+
+if ${CC} x.c > /dev/null 2>&1
+then
+	echo '#define HAVE_SETDTABLESIZE'
+fi
+rm -f a.out x.c x.o
+
+exit 0