1 files changed, 38 insertions, 0 deletions
diff --git a/tests/unistd/dup.c b/tests/unistd/dup.c
new file mode 100644
index 00000000..8b4dca34
--- /dev/null
+++ b/tests/unistd/dup.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int main() {
+  int f, f2, f3;
+
+  printf("DUP\n");
+  f = open("/", O_RDONLY);
+  f2 = open("/", O_RDONLY);
+  f3 = dup(f);
+  printf("errno: %d\n", errno);
+  printf("f: %d\n", f);
+  printf("f2: %d\n", f2);
+  printf("f3: %d\n", f3);
+  printf("close(f1): %d\n", close(f));
+  printf("close(f2): %d\n", close(f2));
+  printf("close(f3): %d\n", close(f3));
+  printf("\n");
+  errno = 0;
+
+  printf("DUP2\n");
+  f = open("/", O_RDONLY);
+  f2 = open("/", O_RDONLY);
+  f3 = dup2(f, f2);
+  printf("errno: %d\n", errno);
+  printf("f: %d\n", f);
+  printf("f2: %d\n", f2);
+  printf("f3: %d\n", f3);
+  printf("close(f1): %d\n", close(f));
+  printf("close(f2): %d\n", close(f2));
+  printf("close(f3): %d\n", close(f3));
+  printf("\n");
+  errno = 0;
+
+  return 0;
+}