1 files changed, 51 insertions, 0 deletions
diff --git a/tests/unistd/ttyname.c b/tests/unistd/ttyname.c
new file mode 100644
index 00000000..7080be5d
--- /dev/null
+++ b/tests/unistd/ttyname.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int main() {
+  char buffer[256];
+  int d = open("/device", O_RDWR);
+  int f = open("/", O_RDONLY);
+  char* result;
+
+  result = ctermid(buffer);
+  if (result) {
+    printf("ctermid: %s\n", result);
+  } else {
+    printf("ctermid errno: %d\n", errno);
+    errno = 0;
+  }
+
+  if (ttyname_r(d, buffer, 256) == 0) {
+    printf("ttyname_r(d, ..., 256): %s\n", buffer);
+  } else {
+    printf("ttyname_r(d, ..., 256) errno: %d\n", errno);
+    errno = 0;
+  }
+
+  if (ttyname_r(d, buffer, 2) == 0) {
+    printf("ttyname_r(d, ..., 2): %s\n", buffer);
+  } else {
+    printf("ttyname_r(d, ..., 2) errno: %d\n", errno);
+    errno = 0;
+  }
+
+  result = ttyname(d);
+  if (result) {
+    printf("ttyname(d): %s\n", result);
+  } else {
+    printf("ttyname(d) errno: %d\n", errno);
+    errno = 0;
+  }
+
+  result = ttyname(f);
+  if (result) {
+    printf("ttyname(f): %s\n", result);
+  } else {
+    printf("ttyname(f) errno: %d\n", errno);
+    errno = 0;
+  }
+
+  return 0;
+}