1 files changed, 8 insertions, 0 deletions
diff --git a/unspecified.c b/unspecified.c
new file mode 100644
index 0000000..28c1647
--- /dev/null
+++ b/unspecified.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int unspecified_main(int argc, char *argv[])
+{
+	(void)argc;
+	fprintf(stderr, "sh: %s is an extension allowed by POSIX but not implemented in this shell\n", argv[0]);
+	return 1;
+}