1 files changed, 13 insertions, 0 deletions
diff --git a/src/libstddjb/fd_sanitize.c b/src/libstddjb/fd_sanitize.c
new file mode 100644
index 0000000..d9349cc
--- /dev/null
+++ b/src/libstddjb/fd_sanitize.c
@@ -0,0 +1,13 @@
+/* ISC license. */
+
+#include <unistd.h>
+
+#include <skalibs/strerr.h>
+#include <skalibs/djbunix.h>
+
+void fd_sanitize (void)
+{
+  if (!fd_ensure_open(2, 1)) _exit(111) ;
+  if (!fd_ensure_open(1, 1)) strerr_diefu3sys(111, "ensure std", "out", " is open") ;
+  if (!fd_ensure_open(0, 0)) strerr_diefu3sys(111, "ensure std", "in",  " is open") ;
+}