1 files changed, 24 insertions, 0 deletions
diff --git a/Lib/test/subprocessdata/fd_status.py b/Lib/test/subprocessdata/fd_status.py
new file mode 100644
index 0000000000..1f61e13a34
--- /dev/null
+++ b/Lib/test/subprocessdata/fd_status.py
@@ -0,0 +1,24 @@
+"""When called as a script, print a comma-separated list of the open
+file descriptors on stdout."""
+
+import errno
+import os
+
+try:
+    _MAXFD = os.sysconf("SC_OPEN_MAX")
+except:
+    _MAXFD = 256
+
+if __name__ == "__main__":
+    fds = []
+    for fd in range(0, _MAXFD):
+        try:
+            st = os.fstat(fd)
+        except OSError as e:
+            if e.errno == errno.EBADF:
+                continue
+            raise
+        # Ignore Solaris door files
+        if st.st_mode & 0xF000 != 0xd000:
+            fds.append(fd)
+    print(','.join(map(str, fds)))