From f3ba6a3e40d72e00d13e943d9338b60b4bee2e40 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Tue, 13 Dec 2022 15:44:17 -0500
Subject: tests: Add a test for readdir() errors

---
 tests/posix/readdir_error.sh | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/posix/readdir_error.sh

diff --git a/tests/posix/readdir_error.sh b/tests/posix/readdir_error.sh
new file mode 100644
index 0000000..cca71f0
--- /dev/null
+++ b/tests/posix/readdir_error.sh
@@ -0,0 +1,21 @@
+clean_scratch
+mkfifo scratch/{pid,hup}
+
+(
+    # Create a zombie process
+    echo >/dev/null &
+    # Write the PID to scratch/pid
+    echo $! >scratch/pid
+    # Don't wait on the processes
+    exec cat scratch/hup >/dev/null
+) &
+
+# Kill cat on exit
+trap "echo >scratch/hup" EXIT
+
+# Read the zombie PID
+read -r pid <scratch/pid
+
+# On Linux, open(/proc/$pid/net) will succeed but readdir() will fail
+skip_unless test -r "/proc/$pid/net"
+fail invoke_bfs "/proc/$pid/net" >/dev/null
-- 
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